CN105828474A - Two-stage light emitting diode safety monitoring lighting device - Google Patents
Two-stage light emitting diode safety monitoring lighting device Download PDFInfo
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- CN105828474A CN105828474A CN201610161074.2A CN201610161074A CN105828474A CN 105828474 A CN105828474 A CN 105828474A CN 201610161074 A CN201610161074 A CN 201610161074A CN 105828474 A CN105828474 A CN 105828474A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
Abstract
The invention discloses a two-stage light emitting diode safety monitoring lighting device. When at night, a light emitting diode light source is on automatically and displays low-brightness lighting; when an action detector detects an intrusive action, the light emitting diode light source is instantly switched into high-stage lighting from low-stage lighting, and after short delay, the low-stage lighting is restored to save energy. The device comprises a power management unit, a light activated switch control unit, an action detection unit, a load and power control unit, a zero crossing point detection circuit and a light emitting unit, wherein the light emitting unit comprises a phase angle controller and an AC light source; the phase angle controller is serially connected with the AC light source and connected with an AC power supply; the AC light source is composed of one or more light emitting diodes; the load and power control unit comprises a microcontroller for controlling the conduction time of the phase angle controller and adjusting the average electric power of the light emitting unit. When the action detection unit detects an intrusive action, the load and power control unit improves the average electric power of the light emitting unit, the light emitting unit generates high-stage brightness, and the high-stage brightness is continued for a preset period of time.
Description
The application is filing date on 07 14th, 2011, Application No. 201110201785.5, the divisional application of invention entitled " two stepwise light emitting diode security monitoring illuminators " patent of invention.
Technical field
The present invention relates to a kind of illuminator, and particularly to a kind of two stepwise light emitting diode security monitoring illuminators with low-order and high-order brightness.
Background technology
The various light sources such as electric filament lamp, fluorescent lamp, Halogen light, and light emitting diode are existing illuminators.Outdoor illumination device generally uses photoconductive resistance automatically to start the light source of light fixture, it is referred to as light-operated mode of operation (Photo-ControlMode, it is called for short PC pattern), under optical mode control, use timer to control light source after one period of set time of all light, the illumination of light fixture extinguished or be switching to relatively low-light level, it is referred to as saving operation mode (Power-SavingMode, it is called for short PS pattern), the most often use movement detection device, light fixture is restarted when personnel being detected near light fixture, make all light one the of short duration time of illumination, reply energy saver mode afterwards.Either automatically starting illumination by detection background light level, regularly all light and illuminate all light from complete dark or lower-wattage brightness by testing staff's action, or adjust the control of brightness, often the complicated circuit engineering of utilization realizes.Especially in the driving of light emitting diode, still fall within the technology of complicated and high cost of manufacture.
The control of various light-source brightness, especially at the Lighting control of light emitting diode, for how strengthening the contrast of brightness of illumination and colour temperature, proposing the simple effective practice, being the problem of the present invention.
Summary of the invention
It is an object of the invention to propose the light emitting diode security monitoring illuminator of a kind of two stepwise brightness, its available adjustment electric current or mode of light source load, when personnel's action being detected in the power save mode, it is immediately switched to high-order brightness and continues for some time to reach the effect of warning.When being not detected by people, to save the energy under the state maintaining low order illumination.
The present invention provides a kind of two stepwise light emitting diode security monitoring illuminators, including a Power Management Unit, a photosensitive switch control unit, an action detector unit, a load and power control unit and a luminescence unit, this luminescence unit includes the light emitting diode of one or more series connection；When this photosensitive switch control unit detects that ambient brightness is less than a preset value, this load and power control unit open this luminescence unit, make this luminescence unit produce a high-order or a low order brightness；When this photosensitive switch control unit detects that ambient brightness is higher than this preset value, this load and power control unit close this luminescence unit；In the power save mode, when this action detector unit detects personnel's action, this load and power control unit improve the electric current flowing through this luminescence unit, make this luminescence unit produce a high-order brightness and continue one section of Preset Time.
The present invention also provides for a kind of two stepwise light emitting diode security monitoring illuminators, including a Power Management Unit, a photosensitive switch control unit, an action detector unit, a load and power control unit and a luminescence unit, this luminescence unit includes the light emitting diode of multiple series connection, when this photosensitive switch control unit detects that ambient brightness is less than a preset value, this load and power control unit open all or part of light emitting diode in this luminescence unit, make this luminescence unit produce a high-order or a low order brightness；When this photosensitive switch control unit detects that ambient brightness is higher than this preset value, this load and power control unit close all light emitting diodes in this luminescence unit；In the power save mode, when this action detector unit detects personnel's action, this load and power control unit open the light emitting diode of the whole numbers in this luminescence unit, make this luminescence unit produce a high-order brightness lasting one section of Preset Time；Fixed current controling circuit is combined, with the light emitting diode in this luminescence unit of fixing direct current driven in this embodiment.
The present invention provides again a kind of two stepwise light emitting diode security monitoring illuminators, including a Power Management Unit, a photosensitive switch control unit, an action detector unit, a load and power control unit and a luminescence unit, this luminescence unit includes a Phase angle control device and one or more AC-operated light sources in parallel, and this Phase angle control device is coupled between said one or the AC-operated light sources of multiple parallel connection and alternating current power supply；Wherein, this load and power control unit adjust the average electrical power of this luminescence unit via this Phase angle control device；When this photosensitive switch control unit detects that ambient brightness is less than a preset value, this load and power control unit open this luminescence unit, make this luminescence unit produce a high-order or the brightness of a low order；When this photosensitive switch control unit detects that ambient brightness is higher than this preset value, this load and power control unit close this luminescence unit；In the power save mode, when this action detector unit detects personnel's action, this load and power control unit improve the average electrical power of this luminescence unit, make this luminescence unit produce a high-order brightness and continue one section of Preset Time.
The present invention also proposes a kind of two stepwise light emitting diode security monitoring illuminators, including a Power Management Unit, one photosensitive switch control unit, one action detector unit, one load and power control unit and a luminescence unit, this luminescence unit is formed by the alternating-current light emitting diode of X high wattage is parallel with one another with the alternating-current light emitting diode of Y low wattage, when this photosensitive switch control unit detects that ambient brightness is less than a preset value, this load and power control unit open the alternating-current light emitting diode of those low wattages, this luminescence unit is made to produce a low order brightness；When this photosensitive switch control unit detects that ambient brightness is higher than this preset value, this load and power control unit close this luminescence unit；When this action detector unit detects an intruder operation, this load and power control unit open the light emitting diode of those high wattage and the light emitting diode of those low wattages simultaneously, making this luminescence unit produce a high-order brightness and continue one section of Preset Time, wherein X, Y are positive integer.
The present invention proposes again a kind of two stepwise light emitting diode security monitoring illuminators, including a Power Management Unit, a photosensitive switch control unit, an action detector unit, a load and power control unit and a luminescence unit, this luminescence unit includes that a rectification circuit is coupled between above-mentioned AC-operated light sources and alternating current power supply with one or more AC-operated light sources in parallel, this rectification circuit；Wherein, this load and power control unit adjust the average electrical power of this luminescence unit via this rectification circuit；When this photosensitive switch control unit detects that ambient brightness is less than a preset value, this load and power control unit open this luminescence unit, make this luminescence unit produce a low order brightness；When this photosensitive switch control unit detects that ambient brightness is higher than this preset value, this load and power control unit close this luminescence unit；When this action detector unit detects an intruder operation, this load and power control unit improve the average electrical power of this luminescence unit, this luminescence unit is made to produce a high-order brightness and continue one section of Preset Time, wherein this rectification circuit includes a switch and a diode of parallel connection, and this switch is controlled by this load and power control unit.
In sum, the light emitting diode security monitoring illuminator of the two benches brightness that the embodiment of the present invention is provided, light-operated and saving operation mode can be performed.Under optical mode control, automatically turn on illumination at dark, and be automatically switched off illumination at cockcrow.Optical mode control first produces the high-order brightness one setting period of illumination, is automatically switching to produce the energy saver mode of low order brightness illumination via control unit afterwards.In the power save mode, when movement detection device detects people, illuminator can be immediately switched to high-order brightness and maintain one section of of short duration Preset Time, to reach illumination or the effectiveness of warning.After Preset Time, illuminator can automatically switch the illumination returning to low order brightness to save the energy.
It is further understood that inventive feature and technology contents for enabling, refers to below in connection with detailed description of the invention and accompanying drawing, but these explanations and institute's accompanying drawings are intended merely to the present invention is described, rather than the interest field of the present invention is made any restriction.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of two stepwise light emitting diode security monitoring illuminators of first embodiment of the invention.
Fig. 2 A is the circuit diagram of two stepwise light emitting diode security monitoring illuminators of first embodiment of the invention.
Fig. 2 B is the oscillogram of the pulse wave width modulation signal PWM of first embodiment of the invention.
Fig. 3 A is the circuit diagram of two stepwise light emitting diode security monitoring illuminators of second embodiment of the invention.
Fig. 3 B is the circuit diagram of two stepwise light emitting diode security monitoring illuminators of second embodiment of the invention.
Fig. 4 A is the circuit diagram of two stepwise light emitting diode security monitoring illuminators of third embodiment of the invention.
Fig. 4 B is the waveform diagram of two stepwise light emitting diode security monitoring illuminators of third embodiment of the invention.
Fig. 5 is the circuit diagram of two stepwise light emitting diode security monitoring illuminators of third embodiment of the invention.
Fig. 6 is the circuit diagram of two stepwise light emitting diode security monitoring illuminators of fourth embodiment of the invention.
Fig. 7 is the circuit diagram of two stepwise light emitting diode security monitoring illuminators of fifth embodiment of the invention.
Wherein, description of reference numerals is as follows:
100: two stepwise light emitting diode security monitoring illuminators；
110: Power Management Unit；
120: photosensitive switch control unit；
130: movement detection unit；
140: load and power control unit；
150,250,350,450,550,650,750: luminescence unit；
220: optical sensor；
230: movement detection device；
240: microcontroller；
260: time setting unit；
L1～L3: light emitting diode；
ACLED, ACLED1～3: alternating-current light emitting diode；
451,551: Phase angle control device；
452,552,553: controllable silicon；
651,652,751～753: switch；
Q1, Q2, Q4, Q5: transistor
R, R1, R2, R16, R17: resistance；
GND: earth terminal；
J1, J2: relay.
Detailed description of the invention
(first embodiment)
With reference to Fig. 1, it show the circuit structure diagram of two stepwise light emitting diode security monitoring illuminators of first embodiment of the invention.Two stepwises light emitting diode security monitoring illuminator (abbreviation illuminator) 100 include Power Management Unit 110, photosensitive switch control unit 120, movement detection unit 130, load and power control unit 140 and luminescence unit 150.Power Management Unit 110 is for providing the power supply needed for System Operation, and its structure includes the most existing AC/DC voltage conversion circuit (AC/DCvoltageconverter).Photosensitive switch control unit 120 e.g. photoconductive resistance, it is coupled to load and power control unit 140, is used for detecting ambient brightness to judge daytime and night.Movement detection unit 130 e.g. passive infrared thread detector (PassiveInfraredSensor, PIR), it is coupled to load and power control unit 140, for detecting whether there is people to enter.When there being people to enter in the detection range of movement detection unit 130, movement detection unit 130 can send detection signal, sends load and power control unit 140 to.
Load and power control unit 140 can use microcontroller implementation, and it is coupled to luminescence unit 150, can control the brightness of luminescence unit 150 according to the detection signal of photosensitive switch control unit 120 with movement detection unit 130.Luminescence unit 150 can include multiple light emitting diode and switch element.Load and power control unit 140 can control luminescence unit 150, to produce the brightness flop of more than at least two.
In the present embodiment, when photosensitive switch control unit 120 detects that ambient brightness is less than preset value (darkness), load and power control unit 140 perform optical mode control, open luminescence unit 150, luminescence unit 150 is made to produce high-order brightness, again through a Preset Time, it is switching to the energy saver mode of low order brightness.When photosensitive switch control unit 120 detects that ambient brightness is higher than preset value (dawn), load and power control unit 140 can close luminescence unit 150.In the power save mode, when movement detection unit 130 detects personnel's action, load and power control unit 140 can improve the electric current flowing through luminescence unit 150, make luminescence unit 150 produce high-order brightness and continue one section of of short duration Preset Time.After of short duration Preset Time, can automatically reduce the electric current flowing through luminescence unit 150, make luminescence unit 150 produce low order brightness to save the energy.
Refer to Fig. 2 A, it show the circuit diagram of illuminator 100 of first embodiment of the invention.Photosensitive switch control unit 120 realizes with optical sensor 220；Movement detection unit 130 realizes with movement detection device 230；Load and power control unit 140 are realized by microcontroller 240.Luminescence unit 250 includes three light emitting diode L1～L3 of series connection.Light emitting diode L1～L3 is connected between a DC source and transistor Q1, and its DC source can be provided by Power Management Unit 110.Transistor Q1 is N channel metal-oxide half field effect transistor (NMOS).Transistor Q1 is connected between three light emitting diode L1～L3 and the ground connection GND of series connection.Load and power control unit 140 realize with microcontroller 240, and it can export pulse wave width modulation signal (PWM) to the grid of transistor Q1, to control the average current that luminescence unit 250 is turned on.It should be noted that the element of above-mentioned Fig. 2 A is only one embodiment of the invention, the present invention is not restricted to the element of Fig. 2 A.
Referring to Fig. 2 B, it show the oscillogram of pulse wave width modulation signal PWM of first embodiment of the invention.Under optical mode control, pwm signal makes the time T that transistor Q1 turns ononRelatively T deadlineoffLong.In the power save mode, pwm signal makes the time T that transistor Q1 turns ononRelatively T deadlineoffShort.The relatively brightness of illumination of two kinds of mode of operations, under optical mode control, due to the time T of Q1 conductingonLong so that the average current of driven for emitting lights unit 250 is higher, so brightness is higher, belongs to high-order brightness；In the power save mode, due to the time T of Q1 conductingonShort so that the average current of driven for emitting lights unit 250 is relatively low, so brightness is relatively low, belong to low order brightness.
Microcontroller 240 can cut out luminescence unit 250 in the daytime, is starting optical mode control at dark, is opening luminescence unit 250 so that it is cuts the energy saver mode of low order illumination after producing high-order brightness a period of time.In the power save mode, when movement detection device 230 detects people, luminescence unit 250 can be switched to high-order brightness to reach illumination or the effect of warning.After luminescence unit 250 maintains the one of short duration period of high-order brightness, low order brightness can be automatically switched to save the energy.
It addition, microcontroller 240 is coupled to a time setting unit 260, this time setup unit 260 is available for users to set persistent period or the time of all light pattern of its high-order brightness under optical mode control, and the present embodiment is not limited.
(the second embodiment)
Referring again to Fig. 1, the brightness flop of its luminescence unit 150 can also produce the brightness of more than at least two by the number of the light source load that adjustment is opened.In the present embodiment, illuminator 100 can produce low order brightness and high-order brightness by lighting part light emitting diode or whole light emitting diodes.
Referring to Fig. 3 A, it show the circuit diagram of illuminator 100 of second embodiment of the invention.Fig. 3 A and Fig. 2 A main difference is that luminescence unit 350, including three light emitting diode L1～L3 and nmos pass transistor Q1, Q2.Light emitting diode L1～L3 connects with transistor Q1, and is connected between DC source and fixed current controling circuit 310.It addition, the two ends of transistor Q2 and light emitting diode L2 and L3 become to be connected in parallel.The grid of transistor Q1 and Q2 is connected respectively to microcontroller 240 and indicates the pin of PC and PS.In the present embodiment, fixed current controling circuit 310 limits the electric current of driven for emitting lights diode L1～L3 for determine electric current, i.e. L1～L3 is luminous with constant current mode (Constant-CurrentMode).
With reference to Fig. 3 A, the PC pin of microcontroller 240 controls transistor Q1 on or off；When PC pin is high potential or electronegative potential, make Q1 on or off respectively, be used for being turned on and off all light emitting diode L1～L3.The PS pin of microcontroller 240 controls transistor Q2 on or off, can form two current loops 351,352 on luminescence unit 350.When the PS pin of microcontroller 240 is high potential, Q2 turns on, and current loop 351 is by light emitting diode L1 and transistor Q2；When PS pin is electronegative potential, Q2 ends, and current loop 352 is by whole light emitting diode L1～L3.So, microcontroller 240 can control light emitting diode number to be opened by transistor Q2, to produce the brightness of high or low rank.
When optical sensor 220 detects that ambient brightness is higher than preset value, microcontroller 240 sends a low-potential voltage from PC pin, and transistor Q1 ends and closes whole light emitting diode L1～L3 in luminescence unit 350.When optical sensor 220 detects that ambient brightness is less than preset value, microcontroller 240 starts optical mode control, namely send a high-potential voltage from PC pin and PS pin is electronegative potential, make transistor Q1 conducting and transistor Q2 cut-off, forming the current loop 352 that Fig. 3 A indicates, three light emitting diode L1～L3 opened in luminescence unit 350 produce high-order brightness.After high-order brightness continues one default period, microcontroller 240 enters energy saver mode, namely PC pin maintains high potential, but PS pin sends a high-potential voltage makes transistor Q2 turn on, form the current loop 351 that Fig. 3 A indicates, therefore only have single light emitting diode L1 luminous, produce low order brightness.
In the power save mode, when movement detection device 230 detects personnel's action, the PS pin of microcontroller 240 is of short duration switches to low-potential voltage from high potential, make the of short duration cut-off of transistor Q2, form current loop 352, open all light emitting diode L1～L3 in luminescence unit 350, make luminescence unit 350 of short duration generation high-order brightness.Wherein, luminescence unit 350 is to determine electric current (definite value) driving, so its brightness can be the most in direct ratio with the light emitting diode number lighted.Fig. 3 B is another type embodiment of Fig. 3 A, substitutes the switching function of nmos pass transistor Q1 and Q2 with relay J 1 and J2.Microcontroller 240 controls relay J 2 and J1 via controlling NPN transistor (NPNbipolarjunctiontransistor) Q4, Q5.Resistance R16, R17 are current-limiting resistance.
Under optical mode control, relay J 1 adhesive, and relay J 2 flicks, and determines electric current and drives all light emitting diode L1～L3 to produce high-order brightness；In the power save mode, relay J 1 and J2 adhesive, determine electric current driven for emitting lights diode L1 and produce low order brightness, and when movement detection device 230 detects personnel's action, the PS pin of microcontroller 240 is of short duration switches to low-potential voltage from high potential, make that relay J 2 is of short duration flicks adhesive again, produce of short duration high-order brightness.
In order to strengthen the contrast of high/low rank brightness, light emitting diode L1 can use 2700K color temperature light emitting diode, and light emitting diode L2, L3 can use 5000K color temperature light emitting diode.Light emitting diode number included by luminescence unit 350 can be more than three, such as 5 or 6.Transistor Q2 can be parallel to the two ends of multiple light emitting diode relatively, to adjust the difference of high/low rank brightness.It addition, luminescence unit 350 may also comprise multiple transistor Q2, it is respectively coupled to the two ends of each light emitting diode to provide more selection modes.Microcontroller 240 can be according to design requirement, in different situations, determines light emitting diode number to be lighted.After via the explanation of above-described embodiment, the art tool usually intellectual should deduce its embodiment, is not added with at this repeating.
(the 3rd embodiment)
Referring again to Fig. 1, its luminescence unit 150 can also include Phase angle control device and one or more alternating-current light emitting diodes in parallel, and Phase angle control device is coupled between said one or the alternating-current light emitting diode of multiple parallel connection and alternating current power supply.In the present embodiment, load and power control unit 140 can adjust the average electrical power of luminescence unit 150 via Phase angle control device, to produce the change of low order brightness and high-order brightness.
Refer to Fig. 4 A, it show the circuit diagram of illuminator 100 of third embodiment of the invention.Fig. 4 A Yu Fig. 3 main difference is that the light source load of luminescence unit 450 is alternating-current light emitting diode ACLED, is couple to alternating current power supply, and luminescence unit 450 also includes Phase angle control device 451.Phase angle control device 451 includes controllable silicon 452, zero-crossing detection circuit 453 and resistance R.When optical sensor 220 detects that ambient brightness is higher than preset value, microcontroller 240 cuts out luminescence unit 450.When optical sensor 220 detects that ambient brightness is less than preset value, microcontroller 240 starts optical mode control, opens luminescence unit 450.Under optical mode control, microcontroller 240 selects one to control foot, pulse signal is sent to trigger controllable silicon 452 via resistance R, produce a big conduction phase angle, make luminescence unit 450 produce high-order brightness, after continuing one default period, controlled foot by same and send the pulse signal of energy saver mode to trigger controllable silicon 452, produce a little conduction phase angle, make luminescence unit 450 be switching to the energy saver mode of low order brightness from high-order brightness.In the power save mode, when movement detection unit 230 detects personnel's action, microcontroller 240 is controlled the of short duration pulse signal sending optical mode control of foot by same, makes luminescence unit 450 reply low order brightness after producing high-order brightness, and lasting one of short duration period.
Lighting control at alternating-current light emitting diode ACLED, microcontroller 240 combines zero-crossing detection circuit 453, by the detected zero crossing time (when such as AC wave shape is by no-voltage), send the pulse signal Tong Bu with alternating current power supply, the controllable silicon 452 triggered in Phase angle control device 451 is allowed to turn on, and thus changes the average electrical power being input to luminescence unit 450.Because alternating-current light emitting diode ACLED has a cut-in voltage V begun to turn ontIf the time point that pulse signal triggering controllable silicon 452 is allowed to conducting is inaccurate, and when triggering pulse and occurring, the instant value of alternating voltage is less than the cut-in voltage V of alternating-current light emitting diode ACLEDt, it is likely to result in alternating-current light emitting diode ACLED flicker or non-luminous phenomenon.So, the pulse signal that microcontroller 240 produces must fall behind one suitable lead time of zero crossing of AC supply voltage string ripple.
The voltage amplitude assuming alternating current power supply is Vm, frequency is f, then for having cut-in voltage VtLight source load, microcontroller 240 output trigger pulse zero crossing lead time tDScope a: t must be limited ino<tD<1/(2f)–to.Wherein to=(1/2 π f) sin-1(Vt/Vm).This criterion is applicable to various alternating-current light emitting diode, to determine that controllable silicon 452 all can stably trigger in the positive-negative half-cycle of alternating current power supply.V with alternating-current light emitting diodet(rms) as a example by=80V, and V is assumedm(rms)=110V and f=60Hz, obtains to=2.2ms and 1/ (2f)=8.3ms.Therefore, the pulse of the modulation phase angle of microcontroller 240 output, lead time t of the zero crossing of its backward alternating voltage string rippleDMust design at 2.2ms < tD< the scope of 6.1ms.
Refer to the waveform diagram of the two stepwise light emitting diode security monitoring illuminators that Fig. 4 B, Fig. 4 B is third embodiment of the invention.Voltage waveform between output connecting pin and 450 two end points of luminescence unit of the zero crossing delay pulse that waveform (a) in Fig. 4 B～(d) represent alternating current power supply, zero-crossing detection circuit 453, microcontroller 240 respectively.The alternating voltage string ripple of 453 alternating current power supplys of zero-crossing detection circuit, such as the little figure (a) in Fig. 4 B, is transformed into and includes a low and symmetrical square wave for a high magnitude of voltage, such as the little figure (b) in Fig. 4 B.At the zero crossing of alternating voltage string ripple, symmetrical square wave is upgraded to high-voltage value from low voltage value, or drops to low voltage value from high-voltage value.That is, the edge of symmetrical square wave zero crossing of corresponding alternating voltage string ripple in sequential.Microcontroller 240 produces the zero crossing delay pulse of the zero crossing relative to alternating voltage string ripple according to the waveform that zero-crossing detection circuit 453 is exported, such as the little figure (c) in Fig. 4 B.Zero crossing delay pulse falls later lead time t relative to the edge of symmetrical square wave in sequentialD。tDMust be an effective range, to determine that controllable silicon 452 can stably trigger and make alternating-current light emitting diode ACLED to turn on.Little figure (d) in Fig. 4 B is the voltage waveform being added between alternating-current light emitting diode ACLED two ends, the brightness of luminescence unit 450 and the conducting period t of alternating-current light emitting diode ACLEDonRelevant, namely tonLength be directly proportional to the average electrical power being input to alternating-current light emitting diode ACLED.Relatively optical mode control and the difference of energy saver mode, under optical mode control, alternating-current light emitting diode ACLED has longer conducting period ton, send high-order brightness；When energy saver mode, the conducting period t of alternating-current light emitting diode ACLEDonShorter, then send low order brightness.
Refer to Fig. 5, it show the circuit diagram of illuminator 100 of third embodiment of the invention.The luminescence unit 550 of illuminator 100 includes alternating-current light emitting diode ACLED1 and ACLED2 and Phase angle control device 551.Phase angle control device includes controllable silicon 552 and 553, zero-crossing detection circuit 554 and resistance R1 and R2.With the difference of the luminescence unit 450 of Fig. 4 A, the luminescence unit 550 of Fig. 5 is that luminescence unit 550 has more than one alternating-current light emitting diode and more than one controllable silicon, and the light emission color temperature of alternating-current light emitting diode ACLED1 and alternating-current light emitting diode ACLED2 can select to differ.
In the embodiment of Fig. 5, alternating-current light emitting diode ACLED1 is that high color temperature is luminous, and alternating-current light emitting diode ACLED2 is that low colour temperature is luminous.Under optical mode control, microcontroller 240 controls conduction phase angle via Phase angle control device 551 and lights alternating-current light emitting diode ACLED1 and ACLED2 simultaneously, makes luminescence unit 450 produce high-order brightness and mixing colour temperature illumination.In the power save mode, microcontroller 240 controls conduction phase angle via Phase angle control device 551 and only lights alternating-current light emitting diode ACLED2, makes luminescence unit 450 produce low order brightness and the illumination of low colour temperature.And in the power save mode, when movement detection device 230 detects personnel's action, microcontroller 240 controls maximum conduction phase angle via Phase angle control device 551 and lights alternating-current light emitting diode ACLED1 and ACLED2, luminescence unit 450 is made to produce high-order brightness and high color temperature illumination, produce and there is the high brightness of alarm function and high shade contrast, and continue one of short duration default period.Illuminator accordingly, can produce the illumination of high or low rank brightness, and the illumination of high-order brightness and low order brightness has and differs tone.The operating principle of other parts of luminescence unit 550 is identical with luminescence unit 450, repeats no more.
(the 4th embodiment)
Refer to Fig. 6, it show the circuit diagram of illuminator 100 of fourth embodiment of the invention.Luminescence unit 650 implements the luminescence unit 150 of Fig. 1, including alternating-current light emitting diode ACLED1～3 and the switch 651 and 652 of three identical luminous powers.Switch 651 and 652 can be relay.Alternating-current light emitting diode ACLED1 and ACLED2 is in parallel and connects with switch 652, constitutes twice power light-sources, and this is in parallel with alternating-current light emitting diode ACLED3 again, constitutes three times power light sources, is couple to alternating current power supply via switch 651.It addition, Fig. 6 realizes load and the power control unit 140 of Fig. 1 with microcontroller 240.The pin of PC and PS of microcontroller 240 is respectively coupled to switch 651 and 652, and output voltage signal controls to switch 651 and 652 to produce short circuit or open circuit respectively.
Under optical mode control, PC and PS of microcontroller 240 connects feet-controlled 651 and 652 and produces short circuit simultaneously, and alternating-current light emitting diode ACLED1～3 is thus connected to alternating current power supply so that luminescence unit 650 produces the high-order brightness of three times powers.After high-order brightness continues one setting period, energy saver mode cut by microcontroller 240, and maintenance switch 651 is in short-circuit condition, but PS connects feet-controlled 652 open circuit, only alternating-current light emitting diode ACLED3 is connected to alternating current power supply so that luminescence unit 650 produces the low order brightness of a times power.In the power save mode, when movement detection device 230 detects personnel's action, the of short duration activate switch of microcontroller 240 652 produces short circuit, sends the high-order brightness of three times powers and continues one section of Preset Time, return the state of switch 652 open circuits, send the low order brightness of a times power.The illuminator of Fig. 6 therefore, it is possible in a simple manner, produces the two benches illumination of at least 3:1 luminance contrast via control switch 651 and 652.
Alternating-current light emitting diode ACLED1 and ACLED2 of Fig. 6 can be high luminous power and 5000K color temperature light sources, and alternating-current light emitting diode ACLED3 is low luminous power and 2700K color temperature light sources, then it is not necessary to use zero-crossing detection circuit, producing two benches illumination from alternating-current light emitting diode, it has more intensive brightness and colour temperature contrast.
(the 5th embodiment)
With reference to Fig. 7, it show the circuit diagram of illuminator 100 of fifth embodiment of the invention.The luminescence unit 750 of Fig. 7 is to connect at an alternating-current light emitting diode ACLED3 and commutation diode D with the difference of the luminescence unit 650 of Fig. 6.Commutation diode D is in parallel with switch 753, and is connected between alternating-current light emitting diode ACLED3 and switch 751.When switching 753 conducting, it is Full wave shape by the alternating current power supply of alternating-current light emitting diode ACLED3.When switching 753 open circuit, being positive half-wave shape by the alternating current power supply of alternating-current light emitting diode ACLED3 because of the rectification of commutation diode D, the luminous power of its alternating-current light emitting diode ACLED3 is left half.
Switch 753 is controlled by the PS pin of microcontroller 240 as switch 752, synchronizes to produce short circuit or open circuit.If the luminous power of three alternating-current light emitting diode ACLED1～3 is identical, under optical mode control, PC and PS of microcontroller 240 connects feet-controlled 751 and switch 752～753 produces short circuit simultaneously, alternating-current light emitting diode ACLED1～3 is the most luminous so that luminescence unit 750 produces the high-order brightness being three times in single LED power.In the power save mode, microcontroller 240 maintains switch 751 short circuit, but controls switch 752 and 753 open circuits.Now, only alternating-current light emitting diode ACLED3 can luminescence.Because alternating current power supply is after commutation diode D rectification, the waveform of the most remaining positive half-wave, so the luminous power of alternating-current light emitting diode ACLED3 is only without the half under rectification state.Under high-order brightness, alternating-current light emitting diode ACLED1～3 meeting all light, and under low order brightness, only alternating-current light emitting diode ACLED3 can produce the brightness of power half.Ratio higher-order brightness and low order brightness, the ratio of its luminous power is 6 to 1, therefore can produce the strongest luminance contrast, to reach to warn the effect of invader.
It should be noted that, in the 5th embodiment, luminescence unit is not limited to alternating-current light emitting diode, luminescence unit can be the AC-operated light sources of alternating-current light emitting diode, electric filament lamp or fluorescent lamp etc..
According to five embodiments of the present invention, use the most several light emitting diodes, in conjunction with microcontroller and various detecting element, realize a type illuminator with easy drive circuit.Can automatically start highlight illumination when ambient brightness deficiency, timing for cutting changes low-light level illumination into afterwards.Additionally, when there being people to enter detection region, illuminator can switch to highlight illumination from low-light level, to provide personnel sufficient illumination, or produce strong brightness and colour temperature contrast, effractor is monitored.
The foregoing is only embodiments of the invention, its scope of the claims being not intended to limit to the present invention.
Claims (10)
1. a stepwise light emitting diode security monitoring illuminator, it is characterized in that, including a Power Management Unit, a photosensitive switch control unit, an action detector unit, load and power control unit, a zero-crossing detection circuit and a luminescence unit, described luminescence unit includes at least one Phase angle control device and at least one AC-operated light sources, and described Phase angle control device is connected described AC-operated light sources and be connected to described alternating current power supply；Wherein, described load and power control unit include a microcontroller, control the ON time of described Phase angle control device with write-in program, adjust the average electrical power of described luminescence unit with this；When described photosensitive switch control unit detects that ambient brightness is less than a preset value, described load and power control unit open described luminescence unit, make described luminescence unit produce a low order brightness；When described photosensitive switch control unit detects that ambient brightness is higher than described preset value, described load and power control unit close described luminescence unit；When described movement detection unit detects an intruder operation, described load and power control unit improve the average electrical power of described luminescence unit, make described luminescence unit produce a high-order brightness and continue one section of Preset Time.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 1, it is characterised in that described AC-operated light sources is alternating-current light emitting diode, and described Phase angle control device includes controllable silicon.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 1, it is characterised in that the ON time of described Phase angle control device is limited in toWith 1/ (2f) toBetween, wherein to=(1/2 π f) sin-1(Vt/Vm), f is the frequency of described alternating current power supply, VmFor the voltage amplitude of described alternating current power supply, VtFor turning on the minimum amount of voltage that needed for described luminescence unit.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 1, it is characterised in that described luminescence unit includes the controllable silicon of multiple AC-operated light sources and equal number, is connected to described alternating current power supply with parallel way.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 1, it is characterized in that, described microcontroller cuts out described luminescence unit in the daytime, an optical mode control is started at the most described microcontroller, open described luminescence unit, make described luminescence unit cut, after producing described high-order brightness a period of time in advance, the energy saver mode that described low order brightness is illuminated again.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 5, it is characterized in that, under described energy saver mode, when described movement detection unit detects people, described luminescence unit will switch to described high-order brightness to reach illumination or the effect of warning.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 5, it is characterized in that, under described optical mode control, described microcontroller controls conduction phase angle via described Phase angle control device and lights whole described luminescence unit simultaneously, makes described luminescence unit produce described high-order brightness and mixing colour temperature illumination.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 5, it is characterized in that, under described energy saver mode, described microcontroller controls conduction phase angle via described Phase angle control device and only lights the described luminescence unit of part, makes described luminescence unit produce described low order brightness and the illumination of low colour temperature.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 5, it is characterized in that, described microcontroller is coupled to a time setting unit, described time setting unit is available for users to set under described optical mode control the persistent period of the described high-order brightness of described luminescence unit, or the time of an all light pattern.
Two stepwise light emitting diode security monitoring illuminators the most according to claim 1, it is characterized in that, described microcontroller combines described zero-crossing detection circuit, by the detected zero crossing time, send the pulse signal synchronize with described alternating current power supply, it is allowed to turn on the controllable silicon in the described Phase angle control device of triggering, thus changes the average electrical power being input to described luminescence unit.
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| CN2011102017855A CN102883496A (en) | 2011-07-14 | 2011-07-14 | Safety monitoring and lighting device for two-order type light emitting diode |
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| CN107191799A (en) * | 2017-06-30 | 2017-09-22 | 芜湖泰伦特能源科技有限公司 | A kind of adjustable type LED illumination lamp |
| CN107289370A (en) * | 2017-06-30 | 2017-10-24 | 芜湖泰伦特能源科技有限公司 | A kind of multi-angle lawn LED illumination lamp |
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