CN2395271Y - Detector for motor vehicle lamp - Google Patents
Detector for motor vehicle lamp Download PDFInfo
- Publication number
- CN2395271Y CN2395271Y CN 99247055 CN99247055U CN2395271Y CN 2395271 Y CN2395271 Y CN 2395271Y CN 99247055 CN99247055 CN 99247055 CN 99247055 U CN99247055 U CN 99247055U CN 2395271 Y CN2395271 Y CN 2395271Y
- Authority
- CN
- China
- Prior art keywords
- car light
- triode
- diode
- power supply
- lamp
- 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
Links
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The utility model discloses a lamp detection device for motor vehicles. The utility model comprises a diode and an independent power supply detection circuit, wherein, the diode is connected in series with a lamp loop, and the independent power supply detection circuit is connected in parallel with the lamp loop; the independent power supply detection circuit is a triode switching circuit which is provided with an independent 3-12V power supplying power supply, and fault of the lamp can be judged by detecting the current in the lamp loop. The utility model is simple in structure, and a driver of the motor vehicle can find the faults of the lamp at any time without shutting down the motor vehicle.
Description
The utility model relates to a kind of detection Vehicular lamp failed equipment.
The detection of current fault to the Vehicular lamp circuit particularly detection of car light filament failure has two kinds of methods: a kind of is manually to check one by one; Another kind is the detection of electrons that adopts sensor.Manually checking one by one not only wastes time and energy, and can only check that after stopping the fault that takes place during driving can not be found at any time; Though adopt the detection of electrons of sensor can grasp situation at any time, system complex, cost an arm and a leg.
The purpose of this utility model provides a kind of simple in structure, can find the Vehicular lamp pick-up unit of car light fault when driving at any time.
For achieving the above object, the technical solution adopted in the utility model is as follows: this Vehicular lamp pick-up unit comprises the diode and the independent current source testing circuit that is attempted by in the vehicle light circuit that are serially connected in the vehicle light circuit, described independent current source testing circuit has independently 3-12V power supply, its positive pole connects the collector of triode, and negative pole connects the negative terminal of car light by diode; Resistance is attempted by between the collector and base stage of triode; The base stage of triode connects the anode of car light, and emitter connects the negative pole of independent current source by display circuit.
During use, the lighting circuit of car light and independent current source testing circuit have separately independently power supply U1 and U2 respectively, and for lighting circuit, U1 powers to car light by diode, lights car light; For the independent current source testing circuit, when open circuit property fault does not appear in the car light part, because the dividing potential drop effect of biasing resistor, transistor base is a low level, and not conducting of triode is when the filament of car light disconnects or during the socket loose contact, transistor base is a high level, the triode conducting, supply voltage is added on the display circuit by the Collector Emitter of triode, and display circuit is given a warning.
Technique scheme is simple in structure, and the inspection of driver's dispense with parking can be found the generation of abnormal conditions such as car light fracture of wire at any time when driving, eliminates the hidden danger of traffic hazard.
Further specify the utility model below in conjunction with drawings and Examples:
Accompanying drawing is the wiring diagram of an embodiment of the present utility model.
As shown in drawings, Vehicular lamp pick-up unit described in the utility model comprises a diode D1 and the independent current source testing circuit S that is attempted by in the car light L loop who is serially connected in the car light L loop.This independent current source testing circuit S has independently 3-12V power supply U2, the electric current of the alternator output on this power utilization motor vehicle is by independently transformation, rectification circuit obtain, also can be from independently storage battery or battery obtain, its positive pole connects the collector of triode Q, and negative pole connects the negative terminal of car light L by diode D2; Biasing resistor R is attempted by between the collector and base stage of triode Q; The base stage of triode Q connects the anode of car light L, emitter connects the negative pole of independent current source U2 by display circuit J, display circuit J can be any device that is subjected to voltage, Current Control, for example: can be a light emitting diode, also can be a miniature loudspeaker or also can be a field of LCD that what adopt in the present embodiment is a light emitting diode.
During use, the lighting circuit of car light and independent current source testing circuit have separately independently power supply U1 and U2 respectively, and for lighting circuit, U1 gives car light L power supply by diode D1, lights car light L; For independent current source testing circuit S, when open circuit property fault did not appear in the car light part, the filament resistance of car light L was less, because the dividing potential drop effect of biasing resistor R, triode Q base stage is a low level, not conducting of triode Q; When the filament of car light L disconnected or other open circuit property faults occur, triode Q base stage was a high level, triode Q conducting, and the voltage of power supply U2 is added on the light emitting diode by collector one emitter of triode Q, makes it luminous.The effect of diode D1 and D2 is thorough separate power supplies U1 and U2.
Triode Q in the accompanying drawing can select switch triodes such as 3DK12, and D1 adopts big current commutates diode, and D2 adopts commutation diode, and divider resistance R adopts the resistance of 10-20K.
This device of one cover is installed can for when on concrete motor vehicle, using the filament of each car light, i.e. corresponding filament of the duty of each light emitting diode, whether diode is luminous can judge whether corresponding filament is normal by observing like this.
Claims (3)
1, Vehicular lamp pick-up unit is characterized in that: this device comprises that one is serially connected in the diode (D1) in car light (L) loop and is attempted by independent current source testing circuit (S) in car light (L) loop.
2, Vehicular lamp pick-up unit according to claim 1, it is characterized in that: described independent current source testing circuit (S) has independently 3-12V power supply, its positive pole connects the collector of triode (Q), and negative pole connects the negative terminal of car light (L) by diode (D2); Resistance (R) is attempted by between the collector and base stage of triode (Q); The base stage of triode (Q) connects the anode of car light (L), and emitter connects the negative pole of independent current source by display circuit (J).
3, Vehicular lamp pick-up unit according to claim 2 is characterized in that: described display circuit (J) is a light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99247055 CN2395271Y (en) | 1999-11-10 | 1999-11-10 | Detector for motor vehicle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99247055 CN2395271Y (en) | 1999-11-10 | 1999-11-10 | Detector for motor vehicle lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2395271Y true CN2395271Y (en) | 2000-09-06 |
Family
ID=34032560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99247055 Expired - Fee Related CN2395271Y (en) | 1999-11-10 | 1999-11-10 | Detector for motor vehicle lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2395271Y (en) |
-
1999
- 1999-11-10 CN CN 99247055 patent/CN2395271Y/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 |