CN2138590Y - Monitor for automobile light - Google Patents
Monitor for automobile light Download PDFInfo
- Publication number
- CN2138590Y CN2138590Y CN 92242490 CN92242490U CN2138590Y CN 2138590 Y CN2138590 Y CN 2138590Y CN 92242490 CN92242490 CN 92242490 CN 92242490 U CN92242490 U CN 92242490U CN 2138590 Y CN2138590 Y CN 2138590Y
- Authority
- CN
- China
- Prior art keywords
- light
- lamp
- voltage
- emitting diode
- volt
- 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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Abstract
A monitor checks whether the light works normally, and in particular the monitor is suitable for monitoring for automobile light. The utility model is composed of an amplifier, an oscillator, a buzzer and a light emitting diode. When the light is not switched on or the light is lighted and the work is conducted normally, the voltage of the positive input end of the operational amplifier is lower than the voltage of the negative input end. The voltage of the output end is zero volt, and the light emitting diode is not lighted, and an oscillating circuit does not work, and the buzzer does not sound. When the automobile light or the lamp wire is broken circuit, the voltage of the positive input end of the operational amplifier is higher than the voltage of the negative input end. The voltage of the output end is near to the voltage of the power supply. The light emitting diode works, and the oscillating circuit is communicated with the buzzer, and the buzzer emits sound to generate the sound and light alarm.
Description
A kind of whether monitor of normal operation of light that detects is specially adapted to car bulb and detects.
Automobile often breaks down in the way of travelling, and is difficult for finding, will influence safety traffic like this.Also do not have the car light failure detector on the automobile both at home and abroad at present, the allied equipment of some foreign data introduction also can only detect when turning on light, and needs automobile circuit is carried out bigger change.
The purpose of this utility model is: for navigating mate provides a kind of reliable and secure automobile lamp detecting device.
The utility model is achieved in that and uses high sensitivity op amp (C) to do detection means that (D) does the sampling part with diode, utilized the diode inelastic region cleverly.The op amp positive input terminal is not through lamp (W) shorted to earth when turning on light, and voltage is 0 volt, and the negative input end reference signal is the partial pressure value of two 510K resistance mid points, and voltage is 5.81 volts.Because positive input terminal voltage is 0 volt far below the former op amp output voltage of negative input end voltage, at this moment fault-indicating lamp (red luminotron) does not work, open circuit as lamp line or car light, op amp positive input terminal voltage rises to 5.97 volts of the partial pressure value of two 1M resistance mid points, anode is higher than negative terminal output near power line voltage, (D) is bright for fault-indicating lamp, opening oscillating circuit (I) simultaneously reports to the police the warning circuit work buzzer phone sound, when car light is lighted such as car light just often take a sample and 0.7 volt of pressure drop arranged on the diode, op amp positive input terminal voltage is 5.65 volts and is lower than negative input end voltage and does not report to the police, when car light or bulb open circuit, op amp positive input terminal voltage rises to 5.9 volts, light-emitting diode is connected and is made oscillating circuit work buzzer warning, and device sends sound and light alarm.
The utility model has the advantages that report to the police immediately, and,, need not debug behind the welding assembly that reliability height, sensitivity, low being easy to of cost are promoted as long as component parameter is qualified as can be known to being that street lamp breaks down in case no matter whether car light uses circuit to break down
Fig. 1 is the light monitor for vehicle schematic circuit diagram.
The utility model embodiment is as follows.(C) for op amp as a comparison circuit be that car light or line are when opening circuit, (D) is not the sampling diode to the high op amp conducting of anode input voltage otherwise op amp is not worked, during the car light normal operation pressure drop be 0.7 volt in non-linear section work, (D) be the light-emitting diode of indication fault, (W) be that lamp (I) is an oscillating circuit, make this circuit oscillation after light-emitting diode is connected, buzzer phone (L) sends audible alarm.
Claims (3)
1, a kind of light monitor, it is made up of resistance, electric capacity, diode, light-emitting diode, op amp etc., it is characterized in that: op amp in this monitoring device (C) is made detector, when lamp (W) is not opened or during normal operation, make op amp anode input voltage be lower than the negative terminal input voltage, the op amp output voltage is 0 volt, light-emitting diode (D) is not worked, make arithmetic and logic unit anode input voltage be higher than negative terminal input voltage lumination of light emitting diode when lamp or lamp line open circuit, oscillating circuit (I) work makes buzzer phone (L) send the sound; When allowing diode (D) when lighting on, lamp (W) have 0.7 volt of pressure drop make it in non-linear disconnected work; The all separate work of each op amp.
2, light monitor according to claim 1, it is characterized in that: the op amp positive input terminal is not 0 volt through lamp (W) shorted to earth voltage when turning on light, negative defeated end is 5.81 volts by the dividing potential drop of two 510K resistance mid points; When lamp or lamp line opened circuit, the positive terminal voltage of op amp rose to 5.97 volts.
3, light monitor according to claim 1 is characterized in that: making when lamp is lighted on the sampling diode (D) has 0.7 volt of pressure drop, and op amp positive input terminal voltage is 5.65 volts, and the anode input voltage rises to 5.9V when lamp or lamp line open circuit
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242490 CN2138590Y (en) | 1992-12-04 | 1992-12-04 | Monitor for automobile light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242490 CN2138590Y (en) | 1992-12-04 | 1992-12-04 | Monitor for automobile light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2138590Y true CN2138590Y (en) | 1993-07-21 |
Family
ID=33782287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92242490 Expired - Fee Related CN2138590Y (en) | 1992-12-04 | 1992-12-04 | Monitor for automobile light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2138590Y (en) |
-
1992
- 1992-12-04 CN CN 92242490 patent/CN2138590Y/en not_active Expired - Fee Related
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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 |