CN108082041B - Steering lamp fault detection system - Google Patents
Steering lamp fault detection systemInfo
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- CN108082041B CN108082041B CN201711432097.3A CN201711432097A CN108082041B CN 108082041 B CN108082041 B CN 108082041B CN 201711432097 A CN201711432097 A CN 201711432097A CN 108082041 B CN108082041 B CN 108082041B
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- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- 230000015556 catabolic process Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention discloses a turn signal fault detection system, which comprises: the input end of the open circuit detection circuit is connected with the first output end of the steering lamp and is used for detecting open circuit information of the steering lamp; the input end of the short circuit detection circuit is connected with the second output end of the steering lamp and is used for detecting the short circuit information of the steering lamp; and the vehicle body controller is respectively connected with the output end of the open circuit detection circuit and the output end of the short circuit detection circuit and is used for outputting fault indication information according to the open circuit information or the short circuit information. The fault detection system of the steering lamp can timely detect fault information and provide the fault information for a driver, so that the formed safety can be effectively improved.
Description
Technical Field
The invention relates to the technical field of car lamps, in particular to a fault detection system of a steering lamp.
Background
A turn signal is an important indicator that is turned on when a motor vehicle turns to alert surrounding vehicles and pedestrians. The turn signal lamp is usually turned on when the motor vehicle turns and turned off when the motor vehicle turns, so that a very visual vehicle dynamic information indication is provided for nearby vehicles and pedestrians, and important guarantee is provided for driving safety. However, since the conventional steering lamp has no fault detection circuit, when the steering lamp is open or broken to fail, fault information cannot be provided to a driver in time, so that the potential safety hazard of driving is increased.
Disclosure of Invention
In view of the above problems, the fault detection system of the turn signal lamp can timely detect fault information and provide the fault information for a driver, so that the formed safety can be effectively increased.
In order to solve the above technical problems, the present invention provides a turn signal fault detection system, comprising:
the open circuit detection circuit is connected with the first output end of the steering lamp and used for detecting open circuit information of the steering lamp;
The input end of the short circuit detection circuit is connected with the second output end of the steering lamp and is used for detecting the short circuit information of the steering lamp;
And the vehicle body controller is respectively connected with the output end of the open circuit detection circuit and the output end of the short circuit detection circuit and is used for outputting fault indication information according to the open circuit information or the short circuit information.
As an improvement of the above-mentioned scheme, the open circuit detection circuit includes: a first triode and a first switching tube, wherein,
The base electrode of the first triode is grounded through a first resistor and a second resistor which are connected in series, the common connecting end of the first resistor and the second resistor is connected to the first output end of the steering lamp, the collector electrode is connected to the input end of the first switching tube, the collector electrode is connected to a power supply through a third resistor, and the emitter electrode is grounded;
the first output end of the first switch tube is connected to the first power supply through a fourth resistor, the second output end of the first switch tube is grounded, and the common connection end of the first output end and the fourth resistor is connected with the vehicle body controller;
when the steering lamp works normally, the first triode is conducted and the first switching tube is cut off, so that the first output end of the first switching tube outputs high level; when the turn signal lamp is in an open circuit, the first triode is cut off and the first switch tube is conducted, so that the first output end of the first switch tube outputs a low level, and open circuit detection is realized.
As an improvement of the scheme, the first switching tube comprises a second triode, the input end of the first switching tube is the base electrode of the second triode, the first output end of the first switching tube is the collector electrode of the second triode, and the second output end of the first switching tube is the emitter electrode of the second triode.
As an improvement of the scheme, the first switching tube comprises a first NMOS tube, the input end of the first switching tube is the grid electrode of the first NMOS tube, the first output end of the first switching tube is the source electrode of the first NMOS tube, and the second output end of the first switching tube is the drain electrode of the first NMOS tube.
As an improvement of the above-described aspect, the short-circuit detection circuit includes: the voltage stabilizing diode, the third triode and the second switching tube, wherein,
The negative electrode end of the voltage stabilizing diode is connected to the second output end of the steering lamp through a fifth resistor, the positive electrode end of the voltage stabilizing diode is grounded through a sixth resistor, and the common connection end of the positive electrode end and the sixth resistor is connected to the base electrode of the third triode through a seventh resistor;
The collector of the third triode is connected to the input end of the second switching tube, and is connected to the power supply through an eighth resistor, and the emitter is grounded;
The first output end of the second switch tube is connected to the first power supply through the fourth resistor, the second output end of the second switch tube is grounded, and the common connection end of the first output end of the second switch tube and the fourth resistor is connected with the vehicle body controller;
When the steering lamp works normally, the voltage stabilizing diode works in a reverse breakdown state, so that the third triode is conducted, the second switching tube is cut off, and the first output end of the second switching tube outputs high level; when the steering lamp is short-circuited, the voltage stabilizing diode is cut off, so that the third triode is cut off, the second switching tube is conducted, and the first output end of the second switching tube outputs low level to realize short-circuit detection.
As an improvement of the above scheme, the second switching tube includes a fourth triode, the input end of the second switching tube is the base electrode of the fourth triode, the first output end of the second switching tube is the collector electrode of the fourth triode, and the second output end of the second switching tube is the emitter electrode of the fourth triode;
As an improvement of the scheme, the second switching tube comprises a second NMOS tube, the input end of the second switching tube is the grid electrode of the second NMOS tube, the first output end of the second switching tube is the source electrode of the second NMOS tube, and the second output end of the second switching tube is the drain electrode of the second NMOS tube.
As an improvement of the scheme, the steering lamp comprises an LED lamp group, wherein the LED lamp group is a plurality of LED lamps connected in series, and the input end of the LED lamp group is connected with a constant current power supply to supply power to the LED lamp group.
As an improvement of the scheme, the first output end of the steering lamp is the negative electrode of the LED lamp group, and the second output end of the steering lamp is the positive electrode of the LED lamp group.
As an improvement of the scheme, the constant-current power supply comprises a boosting constant-current power supply, a reducing constant-current power supply or a SEPIC constant-current power supply, and the constant-current power supply is matched with the quantity of the LED lamp groups and the required current.
Compared with the prior art, the fault detection system of the steering lamp has the following beneficial effects:
(1) The steering lamp fault detection system can effectively detect open-circuit fault information and short-circuit fault information of the steering lamp, further provide fault information for a driver through a vehicle body controller in time, and increase driving safety;
(2) In the turn light fault detection system, the turn lights can be set as serial LED lights, and a constant current power supply is adopted to supply power to the serial LED lights, so that the serial LED lights have brightness consistency; a turn signal fault detection system;
(3) The constant current point source of the steering lamp fault detection system can be configured into a boosting constant current power supply, a reducing constant current power supply or a SEPIC constant current power supply according to the quantity and the current performance of the steering lamps, and the reliability and the portability of the steering lamp fault detection system can be effectively improved.
Drawings
Fig. 1 is a schematic diagram of a fault detection system for a turn signal lamp according to embodiment 1 of the present invention.
Fig. 2 is a schematic circuit diagram of a fault detection system for a turn signal lamp according to embodiment 1 of the present invention.
Fig. 3 is a schematic circuit diagram of a turn signal fault detection system when the turn signal is open in embodiment 1 of the present invention.
Fig. 4 is a schematic circuit diagram of a turn signal fault detection system in the case of a turn signal occurrence section in embodiment 1 of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly practiced by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
The technical scheme of the present invention is clearly and completely described below with reference to specific embodiments and drawings.
Fig. 1 is a schematic diagram of a fault detection system for a turn signal lamp according to embodiment 1 of the present invention.
The fault detection system of the steering lamp comprises: the open circuit detection circuit 1 is connected with the first output end of the turn signal lamp 3 at the input end and is used for detecting open circuit information of the turn signal lamp 3; the input end of the short circuit detection circuit 2 is connected with the second output end of the turn signal lamp 3 and is used for detecting the short circuit information of the turn signal lamp 3; and the vehicle body controller 4 is respectively connected with the output end of the open circuit detection circuit 1 and the output end of the short circuit detection circuit 2 and is used for outputting fault indication information according to the open circuit information or the short circuit information.
Specifically, as shown in fig. 1 and 2, the open circuit detection circuit 1 includes: a first triode Q1 and a first switching tube (not shown), wherein the base electrode of the first triode Q1 is grounded through a first resistor R1 and a second resistor R2 which are connected in series, the common connection end of the first resistor R1 and the second resistor R2 is connected to the first output end of the turn signal lamp 3, the collector electrode is connected to the input end of the first switching tube, the collector electrode is connected to the power supply V1 through a third resistor R3, and the emitter electrode is grounded; the first output end of the first switch tube is connected to a first power supply V1 through a fourth resistor R4, the second output end is grounded, and the common connection end of the first output end and the fourth resistor R4 is connected with a vehicle body controller 4; when the steering lamp 3 works normally, the first triode Q1 is switched on and the first switching tube is switched off, so that the first output end of the first switching tube outputs high level; when the turn signal lamp 3 is turned on, the first triode Q1 is turned off and the first switching tube is turned on, so that the first output end of the first switching tube outputs a low level, and open circuit detection is realized.
For example, as shown in fig. 2, when the first switching tube is the second triode Q2, the input end of the first switching tube is the base electrode of the second triode Q2, the first output end of the first switching tube is the collector electrode of the second triode Q2, and the second output end of the first switching tube is the emitter electrode of the second triode Q2. When the first switching tube is a first NMOS tube (not shown), the input end of the first switching tube is the gate of the first NMOS tube, the first output end of the first switching tube is the source of the first NMOS tube, and the second output end of the first switching tube is the drain of the first NMOS tube.
Further, as shown in fig. 2, the short-circuit detection circuit 2 in embodiment 1 includes: the voltage stabilizing diode D1, the third triode Q3 and a second switching tube (not shown), wherein the negative electrode end of the voltage stabilizing diode D1 is connected to the second output end of the steering lamp 3 through a fifth resistor R5, the positive electrode end of the voltage stabilizing diode D is grounded through a sixth resistor R6, and the common connection end of the positive electrode end and the sixth resistor R6 is connected to the base electrode of the third triode Q3 through a seventh resistor R7; the collector of the third triode Q3 is connected to the input end of the second switching tube, and the collector is connected to a power supply V1 through an eighth resistor R8, and the emitter is grounded; the first output end of the second switch tube is connected to the first power supply V1 through a fourth resistor R4, the second output end is grounded, and the common connection end of the first output end of the second switch and the fourth resistor R4 is connected with the vehicle body controller 4; when the steering lamp 3 works normally, the zener diode D1 works in a reverse breakdown state, so that the third triode Q3 is conducted, the second switch Guan Jiezhi is turned on, and the first output end of the second switch tube outputs a high level; when the turn signal lamp 3 is short-circuited, the zener diode D1 is turned off, so that the third triode Q3 is turned off and the second switching tube is turned on, and the first output end of the second switching tube outputs a low level, thereby realizing short-circuit detection.
The second switching tube can be a triode or an NMOS tube. For example, as shown in fig. 4, when the second switch is the fourth triode Q4, the input end of the second switch tube is the base electrode of the fourth triode Q4, the first output end of the second switch tube is the collector electrode of the fourth triode Q4, and the second output end of the second switch tube is the emitter electrode of the fourth triode Q4. When the second switching tube is a second NMOS tube (not shown), the input end of the second switching tube is the gate of the second NMOS tube, the first output end of the second switching tube is the source of the second NMOS tube, and the second output end of the second switching tube is the drain of the second NMOS tube.
Preferably, in order to improve the consistency of the brightness of the LED lamps in the turn signal lamp 3, as shown in fig. 2, in the turn signal lamp fault detection system of the present invention, the turn signal lamp 3 includes an LED lamp group, the LED lamp group is a plurality of LED lamps connected in series, and the input end of the LED lamp group is connected with a constant current power supply V2 to supply power to the LED lamp group. The first output end of the steering lamp 3 is the negative electrode of the LED lamp group, and the second output end of the steering lamp 3 is the positive electrode of the LED lamp group.
Preferably, in the fault detection system of the steering lamp, the constant current power supply V2 comprises a boosting constant current power supply, a reducing constant current power supply or a SEPIC constant current power supply, and the constant current power supply V2 is matched with the number of LED lamp groups and required current, so that the reliability and portability of the fault detection system of the steering lamp are improved. For example, when the step-down LED lamps are adopted in the LED lamp group, the constant current power supply needs to be configured into the step-down constant current power supply according to the number of the step-down LED lamps and the voltage of the LED lamp group so as to match with the LED lamp group, so that when the LED lamp group works normally, the first triode Q1 can be turned on or the zener diode D1 can work in a direction breakdown state.
Next, the operation procedure of detecting the open fault of the steering lamp according to the present invention will be described by taking the example that the first switching tube is the second triode Q2:
As shown in fig. 2, when the turn signal lamp 3 works normally, the negative power V1 of the turn signal lamp 3 is directly conducted to the upper end of the first resistor R1, the base voltage of the first triode Q1 is always greater than 0.7V after the voltage division of the first resistor R1 and the second resistor R2 is set, so that the first triode Q1 is turned on, and when the first triode Q1 is turned on, the base voltage conducted to the second triode Q2 is about 0V, so that the second triode Q2 is turned off, and the collector of the second triode Q2 outputs a high level;
As shown in fig. 3, when the turn signal lamp 3 is opened, the first resistor R1 and the second resistor R2 are grounded, the current between the base and the emitter of the first triode Q1 is about 0, so that the first triode Q1 is turned off, when the first triode Q1 is turned off, the collector of the first triode Q1 outputs a high level, so that the base voltage of the second triode Q2 correspondingly rises and is greater than 0.7V, thereby enabling the second triode Q2 to be turned on, and the collector pin of the second triode Q2 is pulled low, so that the collector of the second triode Q2 outputs a low level;
Thus, when the vehicle body controller 4 detects that the collector of the second triode Q2 outputs a low level, open circuit detection is realized, and then the vehicle body controller 4 can output open circuit fault indication information according to the detected low level, and the open circuit fault information is provided for a driver in time, so that the driving safety is improved.
It can be understood that when the first switch tube is a first NMOS tube, the state change of the first NMOS tube is similar to the state change of the second triode Q2 when the turn signal lamp 3 is normally operated and is opened, and thus, the description thereof will not be repeated.
Next, the operation procedure of detecting a short-circuit fault of the turn signal lamp according to the present invention will be described by taking the example in which the second switching transistor is the fourth transistor Q4:
As shown in fig. 2, when the steering lamp 3 is operating normally, the zener diode D1 operates in a reverse breakdown state, and after being divided by the sixth resistor R6 and the seventh resistor R7, the base voltage of the third triode Q3 is always greater than 0.7V, so that the third triode Q3 is turned on, and when the third triode Q3 is turned on, the base voltage conducted to the fourth triode Q4 is about 0V, so that the fourth triode Q4 is turned off, and the collector of the fourth triode Q4 outputs a high level;
As shown in fig. 4, when the turn signal lamp 3 is shorted, the resistance of the branch where the turn signal lamp 3 is located becomes smaller, the current divided by the branch where the turn signal lamp 3 is located correspondingly increases, the current divided by the branch where the zener diode D1 is located correspondingly decreases, and then the zener diode D1 works in the off state, so that the current flowing through the sixth resistor R6 and the seventh resistor R7 is about 0, and therefore the third triode Q3 is turned off, when the third triode Q3 is turned off, the collector electrode of the third triode Q3 outputs a high level, so that the base voltage of the third triode Q3 correspondingly increases and is greater than 0.7V, thereby enabling the fourth triode Q4 to be turned on, the collector pin of the fourth triode Q4 to be pulled down, and enabling the collector electrode of the fourth triode Q4 to output a low level;
thus, when the vehicle body controller 4 detects that the collector of the fourth triode Q4 outputs a low level, short circuit detection is realized, and then the vehicle body controller 4 can output short circuit fault indication information according to the detected low level, so that the short circuit fault information is provided for a driver in time, and the driving safety is improved.
It can be understood that when the second switch tube is a second NMOS tube, the state change of the second NMOS tube is similar to the state change of the fourth triode Q4 during normal operation and the occurrence of the turn signal lamp 3, and will not be described herein.
Preferably, in order to simplify the fault detection system of the steering lamp 3, the open circuit information and the short circuit information of the steering lamp 3 can be detected from the same output end, the collector of the second triode Q2 and the collector of the fourth triode Q4 are both connected to the power supply V1 through the fourth resistor R4, the common connection ends of the collector of the second triode Q2 and the collector of the fourth triode Q4 and the fourth resistor R4 form a feedback output end, and then the vehicle body controller 4 realizes fault detection of the steering lamp 3 when detecting that the voltage of the feedback output end is the level.
It should be understood that the turn signal fault detection system of the present invention may be provided with the open circuit detection circuit 1 or the short circuit detection circuit 2 for the turn signal 3 to realize the open circuit fault detection or the short circuit fault detection of the turn signal 3, and is not limited to the embodiments shown in fig. 2-4.
The present invention is not limited to the preferred embodiments, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention will still fall within the scope of the technical solution of the present invention.
Claims (4)
1. A turn signal fault detection system, comprising:
the open circuit detection circuit is connected with the first output end of the steering lamp and used for detecting open circuit information of the steering lamp;
The input end of the short circuit detection circuit is connected with the second output end of the steering lamp and is used for detecting the short circuit information of the steering lamp;
The vehicle body controller is respectively connected with the output end of the open circuit detection circuit and the output end of the short circuit detection circuit and is used for outputting fault indication information according to the open circuit information or the short circuit information;
the open circuit detection circuit includes: a first triode and a first switching tube, wherein,
The base electrode of the first triode is grounded through a first resistor and a second resistor which are connected in series, the common connecting end of the first resistor and the second resistor is connected to the first output end of the steering lamp, the collector electrode is connected to the input end of the first switching tube, the collector electrode is connected to a power supply through a third resistor, and the emitter electrode is grounded;
The first output end of the first switch tube is connected to a first power supply through a fourth resistor, the second output end of the first switch tube is grounded, and the common connection end of the first output end and the fourth resistor is connected with the vehicle body controller;
When the steering lamp works normally, the first triode is conducted and the first switching tube is cut off, so that the first output end of the first switching tube outputs high level; when the turn lamp is opened, the first triode is cut off and the first switch tube is conducted, so that the first output end of the first switch tube outputs low level, and open circuit detection is realized;
the first switching tube comprises a second triode, the input end of the first switching tube is the base electrode of the second triode, the first output end of the first switching tube is the collector electrode of the second triode, and the second output end of the first switching tube is the emitter electrode of the second triode;
The first switch tube comprises a first NMOS tube, the input end of the first switch tube is the grid electrode of the first NMOS tube, the first output end of the first switch tube is the source electrode of the first NMOS tube, and the second output end of the first switch tube is the drain electrode of the first NMOS tube;
the short circuit detection circuit includes: the voltage stabilizing diode, the third triode and the second switching tube, wherein,
The negative electrode end of the voltage stabilizing diode is connected to the second output end of the steering lamp through a fifth resistor, the positive electrode end of the voltage stabilizing diode is grounded through a sixth resistor, and the common connection end of the positive electrode end and the sixth resistor is connected to the base electrode of the third triode through a seventh resistor;
The collector of the third triode is connected to the input end of the second switching tube, and is connected to the power supply through an eighth resistor, and the emitter is grounded;
The first output end of the second switch tube is connected to the first power supply through the fourth resistor, the second output end of the second switch tube is grounded, and the common connection end of the first output end of the second switch tube and the fourth resistor is connected with the vehicle body controller;
When the steering lamp works normally, the voltage stabilizing diode works in a reverse breakdown state, so that the third triode is conducted, the second switching tube is cut off, and the first output end of the second switching tube outputs high level; when the steering lamp is short-circuited, the voltage stabilizing diode is cut off, so that the third triode is cut off, the second switching tube is conducted, and the first output end of the second switching tube outputs low level to realize short-circuit detection;
the second switching tube comprises a fourth triode, the input end of the second switching tube is the base electrode of the fourth triode, the first output end of the second switching tube is the collector electrode of the fourth triode, and the second output end of the second switching tube is the emitter electrode of the fourth triode;
The second switching tube comprises a second NMOS tube, the input end of the second switching tube is the grid electrode of the second NMOS tube, the first output end of the second switching tube is the source electrode of the second NMOS tube, and the second output end of the second switching tube is the drain electrode of the second NMOS tube.
2. The turn signal fault detection system of claim 1 wherein the turn signal comprises an LED light string, the LED light string being a plurality of LED lights connected in series, an input of the LED light string being connected to a constant current power supply to power the LED light string.
3. The turn signal fault detection system of claim 2 wherein the first output of the turn signal is a negative pole of the LED light bank and the second output of the turn signal is a positive pole of the LED light bank.
4. The turn signal fault detection system of claim 2 wherein the constant current power supply comprises a boost constant current power supply, a buck-boost constant current power supply, a buck constant current power supply or a SEPIC constant current power supply, the constant current power supply matching the number of LED lamp sets and the required current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711432097.3A CN108082041B (en) | 2017-12-26 | Steering lamp fault detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711432097.3A CN108082041B (en) | 2017-12-26 | Steering lamp fault detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108082041A CN108082041A (en) | 2018-05-29 |
| CN108082041B true CN108082041B (en) | 2024-07-09 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207747821U (en) * | 2017-12-26 | 2018-08-21 | 广东晶科电子股份有限公司 | A kind of steering indicating light detecting fault system |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207747821U (en) * | 2017-12-26 | 2018-08-21 | 广东晶科电子股份有限公司 | A kind of steering indicating light detecting fault system |
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Address after: 511458 33 Nansha District City Road South, Nansha District, Guangzhou, Guangdong Applicant after: APT ELECTRONICS Co.,Ltd. Address before: 511458 No. 33, South Ring Road, Nansha District, Guangzhou, Guangdong. Applicant before: APT ELECTRONICS Co.,Ltd. |
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