WO2000019389A1 - System and device to signal obstacles to flight - Google Patents

System and device to signal obstacles to flight Download PDF

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Publication number
WO2000019389A1
WO2000019389A1 PCT/IB1999/001582 IB9901582W WO0019389A1 WO 2000019389 A1 WO2000019389 A1 WO 2000019389A1 IB 9901582 W IB9901582 W IB 9901582W WO 0019389 A1 WO0019389 A1 WO 0019389A1
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WO
WIPO (PCT)
Prior art keywords
light
source
electric conductor
conductor
core
Prior art date
Application number
PCT/IB1999/001582
Other languages
French (fr)
Inventor
Giovanni Solari
Original Assignee
Clampco Sistemi Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Clampco Sistemi Srl filed Critical Clampco Sistemi Srl
Priority to AU56443/99A priority Critical patent/AU5644399A/en
Publication of WO2000019389A1 publication Critical patent/WO2000019389A1/en

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources

Definitions

  • This invention concerns a system and device to signal obstacles to flight, such as antennas, buildings, electricity pylons or similar, as set forth in the respective main claims .
  • the invention is suitable to be used particularly, but not exclusively, in electricity supply lines in order to signal the presence of pylons and electric conductors to low-flying aircraft .
  • the state of the art includes devices used in electricity supply lines, especially in those situated in areas affected by air traffic, to signal the presence of the pylons and high tension cables to the aircraft.
  • the state of the art also includes a luminous device comprising a special neon lamp which is directly fed with current from the electricity line.
  • the neon lamp is the high tension, low current type and is fed by means of connection rods of a capacitive type which are hung, by means of ceramic insulators, parallel to the conductors of the high tension line.
  • the devices used in lines with conductors with a smaller section are heavier than the devices used in lines with conductors with a larger section.
  • the purpose of the invention is to provide a device, simple to produce and in function, economical, robust, reliable and suitable to be installed, particularly in electric power lines, easily and quickly.
  • Another purpose of the invention is to provide a device with very low energy consumption.
  • a further purpose is to provide a device with a high level of autonomy even without any maintenance at all.
  • a further purpose is to provide a device with a compact structure, suitable to resist atmospheric agents, high temperature differences and mechanical stresses.
  • One purpose of the invention is to use extremely efficient sources of light which are easily visible even from a great distance .
  • the signalling system provides to feed at least a source of light with a current induced taken from the heads of at least an electric coil coupled inductively with the electric conductor provided in the obstacle to be signalled.
  • the device which embodies this system comprises at least a core on which the electric coil is wound.
  • the alternating electric current circulating in the electric conductor generates a variable magnetic field whose lines of force affect the coil and give rise to an induced current.
  • the induced current is straightened and stabilized before feeding the source of light .
  • the induced current can also be used to feed other defined appliances .
  • At least the source of light can be remotely activated or automatically according to the light conditions of the environment or by a timer.
  • Fig. 1 is a schematic view of a segment of an electricity supply line using the signalling system according to the invention
  • Fig. 2 is a side view, partly sectioned, of a signalling device according to the invention
  • Fig. 3 is a prospective view of the device shown in Fig. 2
  • Fig. 4 shows an enlarged detail of the device shown in Fig. 3.
  • DETAILED DESCRIPTION OF PREFERRED EMBODIMENT With reference to Fig. 1, a plurality of signalling devices 10 according to the invention are associated with the electric conductors 11, located higher up, of an electricity supply line 12.
  • Each device 10, which is shown in Fig. 2 during the step when it is coupled with a conductor 11, comprises an annular-shaped upper shell 13 suitable to couple with the electric conductor 11 and a cylindrical-shaped lower shell 14.
  • the shells, upper 13 and lower 14, are associated by means of a tubular element 16.
  • the upper shell 13 comprises two semi-shells, respectively
  • the upper shell 13 is suitable to contain a toroidal core 19 made in two parts, respectively 19a and 19b, each associated with a respective semi-shell 13a and 13b.
  • the shell 13 is provided with two lateral expansions 26 which can be opened; with the help of internal locking elements, they cooperate with the conductor 11 to prevent the device 10 from sliding along the conductor 11 and thus prevent the latter from being damaged.
  • the lower shell 14 comprises a cover 14a coupled with a cap 14b made of a transparent material such as for example polycarbonate .
  • the cover 14a and the cap 14b are made of materials which are resistant to atmospheric agents, great differences in temperature, ageing and mechanical stresses; they can be the conventional color of white and red or other colors which can be identified at a considerable distance, or they can be colored so as to be camouflaged, thus minimizing their optical impact on the surrounding environment during the day time.
  • the cover 14a and the cap 14b internally define a seating suitable to contain a source of light 15, of the type with reduced consumption and long life, electrically connected to the conductor 20 as will be described in more detail hereafter.
  • the source of light comprises a plurality of light emitting diodes, or LED, 21, for example red and of the ultra-luminous type, mounted on the circumference of a plurality of printed circuits 22; in the embodiment shown here there are eight, disk-shaped and stacked one on top of the other and anchored to the tubular element 16.
  • the electric energy needed to feed the source of light 15 is produced by induction.
  • the device 10 functions as follows:
  • the alternating electric current circulating in the conductor 11 generates a variable magnetic field whose lines of force affect the conductor 20 wound on the toroidal core 19 and give rise to an induced current which can be picked up at the heads 120 of the conductor 20.
  • the induced electric current is fed to a stabilized straightener circuit 23 made on cards associated with the tubular element 16 near the cover 14a.
  • the electric current output from the straightener circuit feeds the printed circuits 22 to light up the diodes 21.
  • the source of light 15 is switched on and off by remote control, by means of a radio frequency transmitter device of a conventional type connected to a receiver device 24 housed below the source of light 15.
  • the transmitter device is mounted on board the aircraft so as to automatically activate the devices 10 when the aircraft are at a defined distance from the electricity supply line 12.
  • a light-sensitive switch is provided on the device 10. It is obvious that, given the limited consumption and long life of the source of light 15, it is also possible to keep it always switched on.
  • the electric current induced in the conductor 20 is also used to feed a de-icing heating device which can be activated automatically by a specific sensor, particularly when the source of light 15 is switched off.
  • the device 10 is equipped with a supplementary source of light suitable to be automatically activated in the event of breakdowns or malfunctions of the main source of light 15.
  • the device 10 is equipped with a system to radio transmit a signal to give warning of a malfunction in the device itself, or to give warning that the intensity of light is insufficient, with a pre-set threshold at which it is activated.
  • the device 10 is equipped with a buffer battery suitable to automatically feed the source of light 15 every time the electric energy in the conductors 11 accidentally fails, or when the electric current in the conductors 11 goes below a pre-set lower limit . It is obvious that modifications or additions may be made to this invention, but these shall remain within the field and scope thereof.

Abstract

System of luminous signals on obstacles to flight, such as antennas, buildings, electricity pylons or similar, wherein said obstacles are provided with at least an electric conductor (11) in which an alternating current circulates, and to which at least a source of light (15) is associated, said source of light (15) being fed by means of an induced current generated on a coil (20) coupled inductively to said conductor (11). Luminous device to signal obstacles to flight, such as antennas, buildings, electricity pylons or similar, wherein said obstacles are provided with at least an electric conductor (11) in which an alternating current circulates, and to which at least a source of light (15) is associated, said device being equipped with means to constrain it to said conductor (11), a core (19) being suitable to cooperate with said electric conductor (11), at least a coil (20) being wound onto said core (19) and connected to said source of light (15), at the heads of the coil (20) an electric current being induced due to the effect of the electro-magnetic field generated by said electric conductor (11).

Description

"SYSTEM AND DEVICE TO SIGNAL OBSTACLES TO FLIGHT"
* * * * *
FIELD OF THE INVENTION This invention concerns a system and device to signal obstacles to flight, such as antennas, buildings, electricity pylons or similar, as set forth in the respective main claims .
The invention is suitable to be used particularly, but not exclusively, in electricity supply lines in order to signal the presence of pylons and electric conductors to low-flying aircraft .
BACKGROUND OF THE INVENTION The state of the art includes devices used in electricity supply lines, especially in those situated in areas affected by air traffic, to signal the presence of the pylons and high tension cables to the aircraft.
Among these, there are signalling devices consisting of balls, usually white and red, which are associated to the guard wire of the electric line. These devices, obviously, are only efficient during the day and in good visibility.
The state of the art also includes a luminous device comprising a special neon lamp which is directly fed with current from the electricity line.
The neon lamp is the high tension, low current type and is fed by means of connection rods of a capacitive type which are hung, by means of ceramic insulators, parallel to the conductors of the high tension line.
These devices have problems in installation and are very expensive. Moreover, the length of the rods and the whole device, and also the number of insulators and neon lamps, is inversely proportionate to the value of the voltage of the line.
This is a problem since the section of the conductors used in the electricity supply lines is directly proportionate to the value of electric energy transported.
As a result, the devices used in lines with conductors with a smaller section are heavier than the devices used in lines with conductors with a larger section.
The present Applicant has devised and embodied this invention to overcome these shortcomings and to obtain further advantages as explained hereafter.
SUMMARY OF THE INVENTION The invention is set forth and characterised in the main claims, while the dependent claims describe other innovative characteristics of the main embodiment.
The purpose of the invention is to provide a device, simple to produce and in function, economical, robust, reliable and suitable to be installed, particularly in electric power lines, easily and quickly.
Another purpose of the invention is to provide a device with very low energy consumption.
A further purpose is to provide a device with a high level of autonomy even without any maintenance at all.
A further purpose is to provide a device with a compact structure, suitable to resist atmospheric agents, high temperature differences and mechanical stresses.
One purpose of the invention is to use extremely efficient sources of light which are easily visible even from a great distance .
The signalling system according to the invention provides to feed at least a source of light with a current induced taken from the heads of at least an electric coil coupled inductively with the electric conductor provided in the obstacle to be signalled.
The device which embodies this system comprises at least a core on which the electric coil is wound. The alternating electric current circulating in the electric conductor generates a variable magnetic field whose lines of force affect the coil and give rise to an induced current. In the preferential embodiment of the invention, the induced current is straightened and stabilized before feeding the source of light .
According to one characteristic of the invention, the induced current can also be used to feed other defined appliances .
According to another characteristic of the invention, at least the source of light can be remotely activated or automatically according to the light conditions of the environment or by a timer. BRIEF DESCRIPTION OF THE DRAWINGS
These and other characteristics of the invention will become clear from the following description of a preferred form of embodiment, given as a non-restrictive example, with reference to the attached drawings wherein: Fig. 1 is a schematic view of a segment of an electricity supply line using the signalling system according to the invention; Fig. 2 is a side view, partly sectioned, of a signalling device according to the invention; Fig. 3 is a prospective view of the device shown in Fig. 2; and Fig. 4 shows an enlarged detail of the device shown in Fig. 3. DETAILED DESCRIPTION OF PREFERRED EMBODIMENT With reference to Fig. 1, a plurality of signalling devices 10 according to the invention are associated with the electric conductors 11, located higher up, of an electricity supply line 12. Each device 10, which is shown in Fig. 2 during the step when it is coupled with a conductor 11, comprises an annular-shaped upper shell 13 suitable to couple with the electric conductor 11 and a cylindrical-shaped lower shell 14.
The shells, upper 13 and lower 14, are associated by means of a tubular element 16.
The upper shell 13 comprises two semi-shells, respectively
13a and 13b, which can be opened; in Fig. 3 they are shown in the open position, constrained together at a first end by means of a pin 17 and at the other end by means of a clamping element 18.
The upper shell 13 is suitable to contain a toroidal core 19 made in two parts, respectively 19a and 19b, each associated with a respective semi-shell 13a and 13b.
The shell 13 is provided with two lateral expansions 26 which can be opened; with the help of internal locking elements, they cooperate with the conductor 11 to prevent the device 10 from sliding along the conductor 11 and thus prevent the latter from being damaged.
Around the lower half 19b (Fig. 4) of the toroidal core 19 a conductor 20 is wound in spirals, thus achieving a coil, the ends 120 of which are taken into the lower shell 14 through the tubular element 16. The lower shell 14 comprises a cover 14a coupled with a cap 14b made of a transparent material such as for example polycarbonate .
The cover 14a and the cap 14b, just as all the other components of the device 10, are made of materials which are resistant to atmospheric agents, great differences in temperature, ageing and mechanical stresses; they can be the conventional color of white and red or other colors which can be identified at a considerable distance, or they can be colored so as to be camouflaged, thus minimizing their optical impact on the surrounding environment during the day time.
The cover 14a and the cap 14b internally define a seating suitable to contain a source of light 15, of the type with reduced consumption and long life, electrically connected to the conductor 20 as will be described in more detail hereafter.
In this case, the source of light comprises a plurality of light emitting diodes, or LED, 21, for example red and of the ultra-luminous type, mounted on the circumference of a plurality of printed circuits 22; in the embodiment shown here there are eight, disk-shaped and stacked one on top of the other and anchored to the tubular element 16. According to one characteristic of the invention, the electric energy needed to feed the source of light 15 is produced by induction.
To be more exact, the device 10 according to the invention functions as follows: The alternating electric current circulating in the conductor 11 generates a variable magnetic field whose lines of force affect the conductor 20 wound on the toroidal core 19 and give rise to an induced current which can be picked up at the heads 120 of the conductor 20. The induced electric current is fed to a stabilized straightener circuit 23 made on cards associated with the tubular element 16 near the cover 14a.
By means of a cable 25, the electric current output from the straightener circuit feeds the printed circuits 22 to light up the diodes 21.
In a first embodiment of the invention, the source of light 15 is switched on and off by remote control, by means of a radio frequency transmitter device of a conventional type connected to a receiver device 24 housed below the source of light 15.
According to a variant, the transmitter device is mounted on board the aircraft so as to automatically activate the devices 10 when the aircraft are at a defined distance from the electricity supply line 12.
In another embodiment, instead of the radio frequency receiver 24, a light-sensitive switch is provided on the device 10. It is obvious that, given the limited consumption and long life of the source of light 15, it is also possible to keep it always switched on.
According to a variant of the invention, moreover, the electric current induced in the conductor 20 is also used to feed a de-icing heating device which can be activated automatically by a specific sensor, particularly when the source of light 15 is switched off.
According to another variant which is not shown here, the device 10 is equipped with a supplementary source of light suitable to be automatically activated in the event of breakdowns or malfunctions of the main source of light 15.
According to a further variant which is not shown here, the device 10 is equipped with a system to radio transmit a signal to give warning of a malfunction in the device itself, or to give warning that the intensity of light is insufficient, with a pre-set threshold at which it is activated.
According to a further variant, the device 10 is equipped with a buffer battery suitable to automatically feed the source of light 15 every time the electric energy in the conductors 11 accidentally fails, or when the electric current in the conductors 11 goes below a pre-set lower limit . It is obvious that modifications or additions may be made to this invention, but these shall remain within the field and scope thereof.

Claims

1 - System of luminous signals on obstacles to flight, such as antennas, buildings, electricity pylons or similar, wherein said obstacles are provided with at least an electric conductor (11) in which an alternating current circulates, and to which at least a source of light (15) is associated, the system being characterised in that said source of light (15) is fed by means of an induced current generated on a coil (20) coupled inductively to said conductor (11).
2 - System as in Claim 1, characterised in that said induced current is straightened and stabilised before feeding the source of light (15) .
3 - System as in Claim 1 or 2, characterised in that means are provided to activate said source of light (15) by remote control .
4 - System as in Claim 3 , characterised in that said remote control activation means are of the radio frequency type.
5 - System as in Claim 1 or 2 , characterised in that means are provided to automatically activate said source of light
(15) according to the light conditions of the environment.
6 - System as in Claim 1 or 2 , characterised in that means are provided to activate said source of light (15) on a timer basis. 7 - System as in Claim 1, characterised in that autonomous feed means are suitable to intervene in the event of a temporary failure of the induced current.
8 - System as in Claim 1, characterised in that heating means are provided with a de-icing function. 9 - Luminous device to signal obstacles to flight, such as antennas, buildings, electricity pylons or similar, wherein said obstacles are provided with at least an electric conductor (11) in which an alternating current circulates, and to which at least a source of light (15) is associated, said device being equipped with means to constrain it to said conductor (11), the device being characterised by a core (19) suitable to cooperate with said electric conductor (11), at least a coil (20) wound onto said core (19) and connected with said source of light (15), at the heads of said coil (20) an electric current being induced due to the effect of the electromagnetic field generated by said electric conductor (11) . 10 - Device as in Claim 9, characterised in that an electric circuit is suitable to straighten and stabilize said induced current .
11 - Device as in Claim 9, characterised in that activation means are suitable to switch on said source of light (15) automatically.
12 - Device as in Claim 11, characterised in that said activation means comprise a receiver circuit functionally associated with said source of light (15) and a transmitter circuit connected with said receiver circuit at a distance. 13 - Device as in Claim 12, characterised in that said transmitter circuit is suitable to be installed on board aircraft .
14 - Device as in Claim 11, characterised in that said activation means comprise at least a light sensitive device. 15 - Device as in Claim 9, characterised in that it comprises a heating circuit with a de-icing function.
16 - Device as in Claim 9, characterised in that it comprises a supplementary source of light suitable to be activated automatically in the event of a breakdown or malfunction of said source of light (15).
17 - Device as in Claim 9, characterised in that a buffer battery is suitable to be automatically activated in the event of a temporary failure in the delivery of electric energy from said electric conductor ( 11 ) .
18 - Device as in Claim 9 , characterised in that said core ( 19 ) is of the toroidal type and is suitable to be coupled in a subs tantially coaxial manner with said electric conductor ( 11 ) .
19 - Device as in Claim 18, characterised in that said core (19) is divided into two semi-cores (19a, 19b) which can be opened to allow said electric conductor (11) to be inserted.
20 - Device as in Claim 9, characterised in that at least an upper shell (13) is suitable to contain said core (19) and to be constrained to said conductor (11) and at least a lower shell (14) suitable to contain said source of light
(15), said shells (13, 14) being associated together by means of a tubular element (16) suitable to allow the heads of said coil (20) to pass.
21 - Device as in Claim 20, characterised in that said lower shell (14) comprises a cover (14a) and a cap (14b) made of transparent material .
22 - Device as in Claim 9, characterised in that said source of light (15) comprises a plurality of light emitting diodes
(21) .
23 - Device as in Claim 22, characterised in that said diodes (21) are assembled on the perimeter of at least a printed circuit (22) shaped like a disk and suitable to be associated with said tubular element (16) .
24 - Device as in Claim 23, characterised in that said upper shell (13) is made of two semi-shells (13a, 13b) which can be opened, each of which being suitable to contain a respective semi-core (19a, 19b), equipped with attachment means (18) suitable to clamp said semi-shells (13a, 13b) in the closed position.
25 - Device as in Claim 20, characterised in that, in cooperation with the upper shell (13), a substantially annular element (26) is suitable to wind around said electric conductor (11), said element (26) being made of material suitable to prevent the device (10) from sliding along said electric conductor (11) and to prevent damage thereto.
PCT/IB1999/001582 1998-09-30 1999-09-27 System and device to signal obstacles to flight WO2000019389A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56443/99A AU5644399A (en) 1998-09-30 1999-09-27 System and device to signal obstacles to flight

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD98A000168 1998-09-30
ITUD980168 IT1302776B1 (en) 1998-09-30 1998-09-30 SYSTEM AND SIGNALING DEVICE FOR OBSTACLES TO FLIGHT

Publications (1)

Publication Number Publication Date
WO2000019389A1 true WO2000019389A1 (en) 2000-04-06

Family

ID=11422753

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1999/001582 WO2000019389A1 (en) 1998-09-30 1999-09-27 System and device to signal obstacles to flight

Country Status (3)

Country Link
AU (1) AU5644399A (en)
IT (1) IT1302776B1 (en)
WO (1) WO2000019389A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095306A (en) * 1932-10-10 1937-10-12 Ohio Brass Co Marker light
DE3309563A1 (en) * 1983-03-17 1984-09-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Arrangement for the power supply of electrical loads in lighting systems
US4904996A (en) * 1988-01-19 1990-02-27 Fernandes Roosevelt A Line-mounted, movable, power line monitoring system
US5208577A (en) * 1991-06-20 1993-05-04 Construcoes Electricas Eltec S.A. Marker light arrangement for power lines
US5254908A (en) * 1992-04-08 1993-10-19 Profile Systems Sign board lighting control system
US5448138A (en) * 1992-12-22 1995-09-05 Staggs; David Aeronautical obstruction light
US5614788A (en) * 1995-01-31 1997-03-25 Autosmart Light Switches, Inc. Automated ambient condition responsive daytime running light system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095306A (en) * 1932-10-10 1937-10-12 Ohio Brass Co Marker light
DE3309563A1 (en) * 1983-03-17 1984-09-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Arrangement for the power supply of electrical loads in lighting systems
US4904996A (en) * 1988-01-19 1990-02-27 Fernandes Roosevelt A Line-mounted, movable, power line monitoring system
US5208577A (en) * 1991-06-20 1993-05-04 Construcoes Electricas Eltec S.A. Marker light arrangement for power lines
US5254908A (en) * 1992-04-08 1993-10-19 Profile Systems Sign board lighting control system
US5448138A (en) * 1992-12-22 1995-09-05 Staggs; David Aeronautical obstruction light
US5614788A (en) * 1995-01-31 1997-03-25 Autosmart Light Switches, Inc. Automated ambient condition responsive daytime running light system

Also Published As

Publication number Publication date
ITUD980168A1 (en) 2000-03-30
IT1302776B1 (en) 2000-09-29
AU5644399A (en) 2000-04-17

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