CN2129238Y - Monitoring instrument for automobile headlight - Google Patents
Monitoring instrument for automobile headlight Download PDFInfo
- Publication number
- CN2129238Y CN2129238Y CN 92208827 CN92208827U CN2129238Y CN 2129238 Y CN2129238 Y CN 2129238Y CN 92208827 CN92208827 CN 92208827 CN 92208827 U CN92208827 U CN 92208827U CN 2129238 Y CN2129238 Y CN 2129238Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage comparator
- resistance
- vehicle lamp
- nand gate
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The utility model relates to a vehicle lamp fault selfchecking device, the property that the resistance of the photoconductive resistance can be changed in the illumination condition and the condition without the illumination is utilized, and the photoconductive resistance is combined with a voltage comparison circuit, and forms a basic circuit with a not-gate circuit, an oscillating circuit and a buzzer. Due to the fact that the circuit of the vehicle lamp fault selfchecking device is not connected with the circuit of the vehicle lamp, both of which work independently, the performance is stable and reliable. The vehicle lamp fault selfchecking device has the advantages of reasonable design, high sensitive degree, and accuracy, and is suitable for the selfchecking on the vehicle lamp faults of various vehicles.
Description
The utility model relates to a kind of vehicle failure automatic trouble locating arrangements, especially a kind of automobile lamp monitor.
Various illuminator lamps, the indication lamp of automobile are the important leverages of safe driving, break down and the driver can not in time find, may cause the generation of traffic accident.In the prior art, the automobile lamp failure detector all is not short circuit is arranged or to open circuit based on the inspection vehicle circuit for lamp, it as Chinese patent application number is 90205122.9 patent application, it has changed the electronic circuit of automobile lamp, its monitoring circuit is made up of isolation diode and a control aerotron that a forward is serially connected in the non-ground terminal of car light, because it is bigger to flow through the electric current of diode, diode causes automobile lamp to work than easy burn-out, thereby reliability is relatively poor.
The purpose of this utility model is to overcome the deficiencies in the prior art part, and a kind of automobile lamp monitor of reasonable in design, dependable performance is provided.
Task of the present utility model is finished like this: form basiccircuit by photoconductive cell, voltage comparator circuit, NAND gate oscillating circuit and buzzer phone etc., resistance changes under two kinds of situations of illumination and unglazed photograph having to utilize photoconductive cell, thereby make the also corresponding characteristic that changes of loss in voltage, adopt voltage comparator LM339, utilize potential device to produce a comparative voltage, compare with the testing circuit current potential, and send the car light failure alarm circuit, with the quality of indication car light comparative result.
Fig. 1 is a basic circuit diagram of the present utility model, and as Figure of abstract.
Further specify principle of work of the present utility model below in conjunction with accompanying drawing.
As car light W
1Not work, K
1Disconnect, photoconductive cell R does not have electric current to pass through.Comparator U
1Positive input is " O " level, reverse input end is that the reference voltage that obtains by potential device is a level"1", at this moment comparator is output as " O ", send into NAND gate through reverser, when the input end of NAND gate is " 1 " entirely, be output as " O ", then the base stage of aerotron 8050 is in active potential, aerotron conducting, buzzer phone do not have electric current to pass through not report to the police; Work as K
1Close, car light is luminous, and photoconductive cell is penetrated by illumination, and the loss in voltage on resistance reduction, the photoconductive cell is very little, and promptly the comparator positive input is " O ", and is same as above, and buzzer phone is not reported to the police; When car light breaks down, then photoconductive cell is because of unglazed photograph, its resistance is very big, and the loss in voltage that adds thereon is also big, and promptly the comparator positive input is " 1 ", then comparator is output as " 1 ", send into NAND gate through reverser, NAND gate is output as " 1 ", and at this moment the base stage of aerotron 8050 is a high level, aerotron ends, buzzer phone has electric current to pass through, and signal gives the alarm.Meanwhile, send optical signal with the corresponding light-emitting diode of the car light that is out of order.
The utility model adopts automobile storage battery+12V power supply, obtains+the 5V power line voltage through regulator block, and the light-emitting diode on the instrument panel is the car light of corresponding automobile one by one.Photoconductive cell is installed on the reflection shield of car light, and cable is along the car light cable routing.This device can be fixed on headstock, and in running car, the driver opens the switch on the instrument panel, and the utility model promptly is in monitoring state.When a certain car light breaks down, cooresponding light-emitting diode is lighted on the instrument panel, buzzer phone sends alerting signal.In the car light service condition just often, the utility model does not send any sound and light signal, can not disperse the attention of chaufeur.
The utility model utilizes the characteristic of photo resistance, and equipment circuit and car light circuit are worked alone separately, does not mutually have impact thereby dependable performance. The utility model is reasonable in design, has sensitivity, characteristics accurately, is suitable for various automobiles and makes the car light fault self-checking.
Claims (1)
- A kind of automobile lamp monitor, by the voltage comparator circuit NAND gate, composition such as oscillating circuit and buzzer phone, it is characterized in that voltage comparator circuit is made up of voltage comparator LM339 and photoconductive cell R and 8.1K resistance and 10K potential device, wherein the voltage comparator negative input end is by fixing reference potential of 10K potential device input, the bleeder circuit that the positive input termination is made up of 8.1K resistance and photoconductive cell, the mouth of voltage comparator links to each other by the input end of phase inverter with light-emitting diode and NAND gate, the mouth of NAND gate links to each other with the base stage of damping resistance with aerotron 8050 by the diode of unidirectional conducting, by control aerotron conducting and end the break-make of controlling the buzzer phone loop, provide drive pulse signal by 555 oscillating circuits that constitute for buzzer warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92208827 CN2129238Y (en) | 1992-04-30 | 1992-04-30 | Monitoring instrument for automobile headlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92208827 CN2129238Y (en) | 1992-04-30 | 1992-04-30 | Monitoring instrument for automobile headlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2129238Y true CN2129238Y (en) | 1993-04-07 |
Family
ID=33762556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92208827 Expired - Fee Related CN2129238Y (en) | 1992-04-30 | 1992-04-30 | Monitoring instrument for automobile headlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2129238Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840622A (en) * | 2010-03-29 | 2010-09-22 | 王家滨 | Automatic lighting illumination alarm system |
| CN102166984A (en) * | 2011-04-06 | 2011-08-31 | 吉林大学 | State monitoring system for turning lights and braking lights of automobile |
| CN102991421A (en) * | 2012-11-30 | 2013-03-27 | 杨夏芳 | External LED (Light Emitting Diode) car lamp system |
| CN109018835A (en) * | 2018-09-05 | 2018-12-18 | 张晨光 | A kind of photo resistance belt indulges this protective device |
-
1992
- 1992-04-30 CN CN 92208827 patent/CN2129238Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840622A (en) * | 2010-03-29 | 2010-09-22 | 王家滨 | Automatic lighting illumination alarm system |
| CN102166984A (en) * | 2011-04-06 | 2011-08-31 | 吉林大学 | State monitoring system for turning lights and braking lights of automobile |
| CN102166984B (en) * | 2011-04-06 | 2012-08-08 | 吉林大学 | State monitoring system for turning lights and braking lights of automobile |
| CN102991421A (en) * | 2012-11-30 | 2013-03-27 | 杨夏芳 | External LED (Light Emitting Diode) car lamp system |
| CN102991421B (en) * | 2012-11-30 | 2015-09-16 | 余姚德诚科技咨询有限公司 | LED exterior vehicle lights system |
| CN109018835A (en) * | 2018-09-05 | 2018-12-18 | 张晨光 | A kind of photo resistance belt indulges this protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |