CN204964697U - LED fault detection device - Google Patents
LED fault detection device Download PDFInfo
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- CN204964697U CN204964697U CN201520661496.7U CN201520661496U CN204964697U CN 204964697 U CN204964697 U CN 204964697U CN 201520661496 U CN201520661496 U CN 201520661496U CN 204964697 U CN204964697 U CN 204964697U
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- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims description 35
- 238000005070 sampling Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 description 4
- 230000005669 field effect Effects 0.000 description 2
- 230000004397 blinking Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a LED fault detection device, include: an at least light pipe, an at least photoelectric switching circuit, gate, electric signal detection circuit and control circuit, the one end of every light pipe presses close to to wait to detect LED, and a photoelectric switching circuit is pressed close to to the other end, waits to detect one -to -one between LED, light pipe, the photoelectric switching circuit three, control circuit is connected with the gate electricity, and awaiting measuring that according to actual need lighted tries LED, and the control gate drives electric signal detection circuit and carries out signal of telecommunication detection to corresponding photoelectric switching circuit, the electricity signal detection circuit be connected with gate, each photoelectric switching circuit and control circuit, carries out the signal of telecommunication to corresponding photoelectric switching circuit and detect under the gate drive to to detect result feedback and give control circuit, judge according to the testing result whether wait to detect LED breaks down for control circuit. The utility model discloses whether can break down LED makes timely detection.
Description
Technical Field
The utility model relates to an on-vehicle equipment technical field especially relates to a LED fault detection device.
Background
At present, an LED is generally integrated in a vehicle-mounted instrument, and various information is indicated through the on and off of the LED. When the LED breaks down, the driver cannot acquire correct automobile state information, and driving safety is affected. However, in the conventional technology, the automobile is not provided with a device for timely detecting the failure of the LED, and generally depends on human discovery.
SUMMERY OF THE UTILITY MODEL
Accordingly, there is a need for an LED failure detection device that can detect whether an LED fails in time.
An LED fault detection device comprising: the system comprises at least one light guide pipe, at least one photoelectric conversion circuit, a gating circuit, an electric signal detection circuit and a control circuit; wherein,
one end of each light guide pipe is close to an LED to be detected, the other end of each light guide pipe is close to a photoelectric conversion circuit, and the LED to be detected, the light guide pipe and the photoelectric conversion circuit are in one-to-one correspondence;
the control circuit is electrically connected with the gating circuit, and controls the gating circuit to drive the electric signal detection circuit to detect the electric signal of the corresponding photoelectric conversion circuit according to the LED to be tested which is lighted according to actual needs;
the electric signal detection circuit is connected with the gating circuit, each photoelectric conversion circuit and the control circuit, and is used for detecting electric signals of the corresponding photoelectric conversion circuit under the driving of the gating circuit and feeding back a detection result to the control circuit so that the control circuit can judge whether the LED to be detected has faults according to the detection result.
Furthermore, a light shield is arranged at one end, close to the LED to be detected, of each light guide pipe; and the outer surface of each light guide pipe is coated with a shading coating.
Specifically, each of the photoelectric conversion circuits includes a photodiode.
Specifically, the electric signal detection circuit includes a voltage/current sampling circuit and an analog-to-digital conversion circuit;
the voltage/current sampling circuit samples voltage or current of the photoelectric conversion circuit; the analog-to-digital conversion circuit converts the sampled analog signal into a digital signal and transmits the digital signal to the control circuit.
Specifically, the control circuit comprises an MCU, and the MCU reads the numerical value of the digital signal and judges whether the corresponding LED to be detected works normally according to whether the numerical value is within a preset range.
Further, the LED fault detection device also comprises an alarm circuit connected with the control circuit, and the alarm circuit gives an alarm when the LED to be detected has a fault.
According to the LED fault detection device, the light pipe is used for receiving the optical signal of the LED to be detected, the optical signal is transmitted to the photoelectric conversion circuit to be converted into the electric signal, the control circuit lights the LED to be detected to control the electric signal detection circuit to detect the electric signal of the corresponding photoelectric conversion circuit according to actual needs, the detection result is fed back to the control circuit, and the control circuit judges whether the LED to be detected is in fault according to the detection result.
Drawings
Fig. 1 is a schematic structural diagram of an LED failure detection apparatus in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, in one embodiment there is provided an LED fault detection apparatus comprising: the device comprises at least one light guide pipe, at least one photoelectric conversion circuit, a gating circuit, an electric signal detection circuit and a control circuit. One end of each light guide pipe is close to an LED to be detected, the other end of each light guide pipe is close to a photoelectric conversion circuit, and the LED to be detected, the light guide pipe and the photoelectric conversion circuit are in one-to-one correspondence. The control circuit is electrically connected with the gating circuit, and the gating circuit is controlled to drive the electric signal detection circuit to detect the electric signal of the corresponding photoelectric conversion circuit according to the LED to be tested which is lighted according to actual needs. The electric signal detection circuit is connected with the gating circuit, each photoelectric conversion circuit and the control circuit, carries out electric signal detection on the corresponding photoelectric conversion circuit under the driving of the gating circuit, and feeds back the detection result to the control circuit so that the control circuit can judge whether the LED to be detected breaks down according to the detection result.
The working principle of the device in this embodiment can be specifically explained as follows:
each light pipe is pressed close to the one end of waiting to detect LED and is equipped with the lens hood, prevents that the ambient light intensity from to detecting the production influence, also prevents to detect the light that LED sent and is received by other light pipes. The outer surface of each light guide pipe is covered with a shading coating. The LED to be detected is integrated in various vehicle-mounted instruments and can be lightened according to actual needs (controlled by a human or automobile controller). When the LED is lighted, the light pipe can receive a certain light signal, and when the LED is extinguished, the light pipe cannot acquire the light signal with enough intensity.
The control circuit CAN be connected with the automobile controller in a CAN bus, a serial port and other modes, CAN directly acquire the identification number of the LED to be detected which needs to be lightened actually, controls the gating circuit to drive the electric signal detection circuit to detect the electric signal of the corresponding photoelectric conversion circuit, and feeds back the detection result to the control circuit. Optionally, each of the photoelectric conversion circuits includes a photodiode, the gating circuit may be composed of a plurality of field effect transistors, and when some photodiodes need to be subjected to electrical signal detection, the field effect transistors are in a closed state to form a loop. It is to be understood that the form of the gate circuit is not limited thereto, and the present invention is not limited thereto. If the photodiode receives the light signal transmitted by the light pipe, current and voltage are generated. The electric signal detection circuit comprises a voltage/current sampling circuit and an analog-to-digital conversion circuit, wherein the voltage/current sampling circuit samples voltage or current of the photoelectric conversion circuit, and the analog-to-digital conversion circuit converts a sampled analog signal into a digital signal and transmits the digital signal to the control circuit. The control circuit comprises an MCU, the MCU reads the numerical value of the digital signal and judges whether the corresponding LED to be detected works normally or not according to whether the numerical value is within a preset range or not.
Optionally, the device in this embodiment may further include an alarm circuit connected to the control circuit, the alarm circuit may alarm when the to-be-detected LED fails, and the alarm circuit may include a speaker, a blinking LED, or another display screen.
The LED failure detection apparatus provided in the above embodiment receives an optical signal of an LED to be detected by using a light pipe, and transmits the optical signal to a photoelectric conversion circuit to be converted into an electrical signal, the control circuit controls the detection circuit to detect the electrical signal of the corresponding photoelectric conversion circuit according to the LED to be detected which is turned on as required, and feeds back a detection result to the control circuit, and the control circuit determines whether the LED to be detected fails according to the detection result.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. An LED fault detection device, comprising: the system comprises at least one light guide pipe, at least one photoelectric conversion circuit, a gating circuit, an electric signal detection circuit and a control circuit; wherein,
one end of each light guide pipe is close to an LED to be detected, the other end of each light guide pipe is close to a photoelectric conversion circuit, and the LED to be detected, the light guide pipe and the photoelectric conversion circuit are in one-to-one correspondence;
the control circuit is electrically connected with the gating circuit, and controls the gating circuit to drive the electric signal detection circuit to detect the electric signal of the corresponding photoelectric conversion circuit according to the LED to be tested which is lighted according to actual needs;
the electric signal detection circuit is connected with the gating circuit, each photoelectric conversion circuit and the control circuit, and is used for detecting electric signals of the corresponding photoelectric conversion circuit under the driving of the gating circuit and feeding back a detection result to the control circuit so that the control circuit can judge whether the LED to be detected has faults according to the detection result.
2. The apparatus according to claim 1, wherein a light shield is disposed at an end of each of the light pipes adjacent to the LED to be detected; and the outer surface of each light guide pipe is coated with a shading coating.
3. The apparatus of claim 1, wherein each of the photoelectric conversion circuits comprises a photodiode.
4. The apparatus of any one of claims 1 to 3, wherein the electrical signal detection circuit comprises a voltage/current sampling circuit and an analog-to-digital conversion circuit;
the voltage/current sampling circuit samples voltage or current of the photoelectric conversion circuit; the analog-to-digital conversion circuit converts the sampled analog signal into a digital signal and transmits the digital signal to the control circuit.
5. The device according to claim 4, wherein the control circuit comprises an MCU, the MCU reads the numerical value of the digital signal and judges whether the corresponding LED to be detected works normally according to whether the numerical value is within a preset range.
6. The device of claim 1, further comprising an alarm circuit connected to the control circuit for alarming when the LED to be detected fails.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520661496.7U CN204964697U (en) | 2015-08-28 | 2015-08-28 | LED fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520661496.7U CN204964697U (en) | 2015-08-28 | 2015-08-28 | LED fault detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204964697U true CN204964697U (en) | 2016-01-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520661496.7U Expired - Fee Related CN204964697U (en) | 2015-08-28 | 2015-08-28 | LED fault detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204964697U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093090A (en) * | 2015-08-28 | 2015-11-25 | 惠州华阳通用电子有限公司 | LED fault detection apparatus and method |
-
2015
- 2015-08-28 CN CN201520661496.7U patent/CN204964697U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093090A (en) * | 2015-08-28 | 2015-11-25 | 惠州华阳通用电子有限公司 | LED fault detection apparatus and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |