CN100517898C - Protector for vehicle electric seat - Google Patents
Protector for vehicle electric seat Download PDFInfo
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- CN100517898C CN100517898C CNB2006100659476A CN200610065947A CN100517898C CN 100517898 C CN100517898 C CN 100517898C CN B2006100659476 A CNB2006100659476 A CN B2006100659476A CN 200610065947 A CN200610065947 A CN 200610065947A CN 100517898 C CN100517898 C CN 100517898C
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- protective device
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Abstract
A protection device of motor-driven seat on automobile is prepared as using a processing unit to control rotation of motor through motor actuator, using transducer to sense rotation of motor and to generate square wave with frequency in direct ratio to rotary speed of motor, setting motor rotary speed signal processing module in said processing unit and using said module to receive said square wave and to emit out signal allowing motor to be operated or not to motor actuator according to frequency of said square wave.
Description
Technical field
The present invention relates to electric seat of car, especially relate to a kind of protective device of electric seat of car.
Background technology
The technology of regulating automotive seat at present is divided into three kinds, be mechanical type seat adjustment technology, manual type automatic seat regulation technology and self-action automatic seat regulation technology, and the automatic seat regulation technology has become the developing direction of automotive seat regulation technology owing to advantages such as its better fail safe, comfortableness, hommizations.
Fig. 1 has shown the end view of a general-utility car seat, seat among the figure comprises cushion, it can move forward and backward A1, and can move up and down A2, backrest can move forward and backward A3, and headrest can move up and down A4, and the cooperation of these several move modes can make the passenger obtain the only seating position of the most comfortable.
Fig. 2 has shown the block diagram of existing automatic chair control device, A1-A4 represents the control to the automatic seat diverse location among the figure, common automatic chair control device comprises: processing unit, motor driver, motor and transducer, wherein, processing unit is the core of The whole control device, it can receive the signal that comes from miscellaneous part, these signals are carried out computing and operation result is sent to motor driver, motor driver is again according to these operation result drive motors rotations, thereby the control seat moves to suitable position.
The transducer that is connected with motor is used for the rotating speed of detection-sensitive motor, and produce the square-wave signal that frequency is directly proportional with motor speed, and the square-wave signal of these generations sent it back processing unit, thereby processing unit can read the information that motor rotates from the square-wave signal that feeds back to, and according to suitable adjustment rotating speed of motor.For example; when moving, seat is subjected to resistance or barrier and can not be mobile the time; rotating speed of motor will be zero; described transducer will not produce square-wave signal this moment; present technology is; when the processing unit of automatic seat is when checking less than square-wave signal within a certain period of time; judge that then seat has run into barrier and can not move at this moment; thereby disable motor; prevent that motor from taking place to damage or burn; Figure 3 shows that the analytic curve that the automatic seat protective device is adopted in the prior art; abscissa is the label of Frequency point among the figure, and ordinate is the square wave frequency size, when described processing unit detects less than square-wave signal within a certain period of time; be the P3 point, will control motor and stop operating.But the judgement of this situation is inaccurate, because check that in a period of time the motor of seat may be subjected to infringement, thereby can not effectively protect seat safety when believe less than square wave, and raising useful life.
Summary of the invention
The objective of the invention is to overcome the defective that effectively to protect the seat motor in the prior art, provide a kind of and can be subjected to obstacle and initial stage of slowing down just closes motor, thereby prevent that motor from being burnt or damage at seat.
The invention provides a kind of protective device of electric seat of car; this protective device comprises: processing unit; motor driver; motor and transducer; this protective device also comprises the motor speed signal processing module; described processing unit is used for the rotation by motor driver control motor; described transducer is used for the rotation of detection-sensitive motor and produces the square wave that frequency is directly proportional with motor speed; described motor speed signal processing module is in described processing unit; be used to receive the square wave that described transducer produces; and send the signal that whether allows machine operation to described motor driver according to the frequency of this square wave; wherein; described motor speed signal processing module comprises rate of change size decision sub-module; be used to judge the size of square wave frequency in the unit interval fall; if described square wave frequency greater than a rate of change threshold value, then makes motor quit work in the unit interval fall.
Protective device provided by the invention and guard method can improve the fail safe of electric seat of car, prevent to damage owing to being subjected to resistance.
Description of drawings
Fig. 1 is the end view of automotive seat;
Fig. 2 is the automobile seat control device schematic diagram of prior art;
Fig. 3 is the analytic curve that the automobile seat control device of prior art is adopted;
Fig. 4 is according to automobile seat control device schematic diagram of the present invention;
Fig. 5 is the automobile seat control device schematic diagram according to first embodiment of the invention;
Fig. 6 is the automobile seat control device schematic diagram according to second embodiment of the invention;
Fig. 7 is automobile seat control device schematic diagram according to the preferred embodiment of the present invention;
The analytic curve that Fig. 8 is adopted for automobile seat control device according to the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Fig. 4 is the schematic diagram according to automatic seat protective device of the present invention, and wherein A1-A4 represents the control to the automatic seat diverse location.Among the figure; automatic seat protective device provided by the invention comprises processing unit, motor driver, motor, transducer and motor speed signal processing module; described processing unit is used for the rotation by motor driver control motor; described transducer is used for the rotation of detection-sensitive motor and produces the square wave that frequency is directly proportional with motor speed; described motor speed signal processing module is in described processing unit; be used to receive the square wave that described transducer produces, and send the signal that whether allows machine operation to described motor driver according to the frequency of this square wave.
Being used to control the single-chip microcomputer that seat moves for existing on the automobile under the described processing unit preferable case, also can be independent microprocessor or hardware circuit.
Under the preferable case, described transducer is a Hall element.
According to an embodiment of the invention, as shown in Figure 5, described motor speed signal processing module comprises frequency size decision sub-module, is used to judge the size of square wave frequency, if frequency less than a threshold value, then makes motor quit work.
The analytic curve that Fig. 8 is adopted for automobile seat control device according to the present invention.Abscissa among the figure is represented the label of square wave frequency point, and ordinate is represented the size of square wave frequency.It will be appreciated that, numeral 5,10,15 of ordinate or the like only is exemplary and representational, do not represent that the frequency corresponding with this point one is decided to be this value, for example can to represent frequency be the square wave of 10Hz to numeral 10, the square wave frequency of numeral 20 representatives is 20Hz, and the two corresponding motor speed is respectively 1 revolutions per second and 2 revolutions per seconds.As can be seen from Figure, square wave frequency, promptly Dai Biao motor speed kept constant substantially before the P1 point, and this shows that motor is in normal running status; And square wave frequency begins to descend at the P1 point, and when square wave frequency is that motor speed is reduced to a certain degree P2 and during less than a threshold value, shows that then seat has run into obstacle, motor speed signal processing module control this moment motor quits work.And prior art just detects the mobile barrier that runs into of seat up to the P3 point, and this moment motor and running part be subjected to a certain degree infringement.The threshold speed that P2 is ordered can be set according to the mechanical parameter of the parameter of electric machine and transmission, for example, corresponding with the ordinate among the figure, this threshold value can be decided to be 20, be square wave frequency when being lower than 20Hz (rotating speed is lower than 2 revolutions per seconds), then show the mobile barrier that run into of seat.
According to another embodiment of the present invention, as shown in Figure 6, described motor speed signal processing module comprises rate of change size decision sub-module, be used to judge the size of square wave frequency in the unit interval fall, if described square wave frequency greater than a rate of change threshold value, then makes motor quit work in the unit interval fall.It should be noted that, here the said unit interval can be 1 second, 0.1 second, 0.01 second or other values, generally speaking, unit interval described here is two durations (being the duration of representative between the adjacent label of abscissa) between the sampled point, for example 1.6 milliseconds.
As shown in Figure 8, square wave frequency is basic before the P1 point to keep constant, the variation of frequency is less, and after the P1 point, begin quick decline, at this moment, if more precipitous decline curve, shown in curve a among the figure, show that then motor is subjected to stopping of external force suddenly, rotating speed sharply descends, at this moment, even curve does not also reach above-mentioned P2 point, because the fall in the unit interval of curve a, promptly this slope of a curve has surpassed a percentage speed variation threshold value, and described signal processing module still makes motor quit work.
It will be appreciated that above-described two execution modes can also can combine as criterion separately as criterion, for example, the two can be the relation of " with (AND) ", can be the relation of " or (OR) ", also can be other more known logical relations.This combination can be according to actual conditions and difference.
Under the preferable case; as shown in Figure 7; automatic seat protective device provided by the invention further comprises current/voltage detecting unit and current/voltage discrimination module; described current/voltage detecting unit is used for the electric current and/or the voltage of detection-sensitive motor and/or processing unit; described current/voltage discrimination module is in described processing unit; be used to receive the electric current and/or the voltage of the motor that described current/voltage detecting unit senses; when described electric current greater than a voltage threshold (for example loose contact) time, quits work motor greater than a current threshold (for example short circuit) or voltage.
Described current/voltage detecting unit can be present any known device that can sense current/voltage.
Described current/voltage discrimination module can be software or the hardware module in the described processing unit.
According to preferred implementation of the present invention; described automatic seat protective device further comprises the processing unit protection module; as shown in Figure 7; this processing unit protection module is in described processing unit; be used to receive the electric current and/or the voltage of the processing unit that described current/voltage detecting unit senses; if the voltage of described processing unit or electric current too high or too low (for example situation of short circuit or loose contact) then make described processing unit quit work.Here said too high or too low, be meant electric current and or voltage exceed the curtage of described processing unit normal range of operation.
Claims (5)
1. the protective device of an electric seat of car, this protective device comprises processing unit, motor driver, motor and transducer, this protective device also comprises the motor speed signal processing module; Described processing unit is used for the rotation by motor driver control motor, described transducer is used for the rotation of detection-sensitive motor and produces the square wave that frequency is directly proportional with motor speed, described motor speed signal processing module is in described processing unit, be used to receive the square wave that described transducer produces, and send the signal that whether allows machine operation to described motor driver according to the frequency of this square wave, wherein, described motor speed signal processing module comprises rate of change size decision sub-module, be used to judge the size of square wave frequency in the unit interval fall, if described square wave frequency greater than a rate of change threshold value, then makes motor quit work in the unit interval fall.
2. protective device according to claim 1, wherein, described transducer is a Hall element.
3. protective device according to claim 1, wherein, described motor speed signal processing module further comprises frequency size decision sub-module, is used to judge the size of square wave frequency, if frequency less than a threshold value, then makes motor quit work.
4. according to any described protective device in the claim 1 to 3; wherein; this protective device further comprises current/voltage detecting unit and current/voltage discrimination module; described current/voltage detecting unit is used for the electric current and/or the voltage of detection-sensitive motor and/or described processing unit; described current/voltage discrimination module is in described processing unit; be used to receive the electric current and/or the voltage of the motor that described current/voltage detecting unit senses; when described electric current greater than a voltage threshold time, quits work motor greater than a current threshold or voltage.
5. protective device according to claim 4; wherein; this protective device further comprises the processing unit protection module; this processing unit protection module is in described processing unit; be used to receive the electric current and/or the voltage of the processing unit that described current/voltage detecting unit senses; if the voltage of described processing unit or electric current exceed the normal range of operation of described processing unit, this processing unit is quit work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100659476A CN100517898C (en) | 2006-03-27 | 2006-03-27 | Protector for vehicle electric seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100659476A CN100517898C (en) | 2006-03-27 | 2006-03-27 | Protector for vehicle electric seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101047311A CN101047311A (en) | 2007-10-03 |
| CN100517898C true CN100517898C (en) | 2009-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100659476A Active CN100517898C (en) | 2006-03-27 | 2006-03-27 | Protector for vehicle electric seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100517898C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795032A (en) * | 2012-10-29 | 2014-05-14 | 北汽福田汽车股份有限公司 | Detection device and detection method of motor stalling |
| CN113031478B (en) * | 2021-03-02 | 2022-12-09 | 上海科世达-华阳汽车电器有限公司 | Control device and method for preventing unexpected sliding of automobile seat |
| CN113276739B (en) * | 2021-04-25 | 2022-11-25 | 宁波宝贝第一母婴用品有限公司 | Headrest adjusting method and system and child safety seat |
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2006
- 2006-03-27 CN CNB2006100659476A patent/CN100517898C/en active Active
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| Publication number | Publication date |
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| CN101047311A (en) | 2007-10-03 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: BYD Automobile Co., Ltd Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.4.25 to 2013.11.18 contract change Contract record no.: 2008440000072 Denomination of invention: Protector for vehicle electric seat License type: General permission Record date: 2008.5.4 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.25 TO 2013.11.18 Name of requester: BYD AUTOMOBILE CO., LTD. Effective date: 20080504 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |