LED automobile steering lamp fault detection circuit and method
A fault detection circuit, LED turn signal technology, applied in the direction of electric light source, electrical components, vehicle parts, etc., can solve the problems of low LED lamp power, inability to accurately determine faults, current changes, etc., to save wiring harness connections, easy to implement , The effect of simple detection circuit
Active Publication Date: 2018-04-27
CHONGQING CHANGAN AUTOMOBILE CO LTD
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the power of LED lights is low, the current change after power failure or failure is small, and it is easily covered by the change of vehicle level voltage and the noise on the transmission path of the detection circuit, etc., so the fault cannot be accurately judged. A new fault detection method, the detection module circuit of this detection method should be simple and easy to implement, low in cost, and easy to realize cost control of the whole vehicle
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0018] Such as figure 1 As shown, a LED automobile turn signal fault detection circuit includes two parts: a fault detection feedback circuit and a fault detection circuit. The fault detection circuit includes: IN_LED terminal, R1 resistor 1, R2 resistor 2, R3 resistor 3, capacitor C4, VBAT power supply terminal and OUT_BCM terminal. Wherein, the IN_LED end is an external connector, one end is externally connected to an LED turn signal, and the other end is respectively connected to one end of R1 resistor 1, R2 resistor 2 and capacitor C4. The other end of the R1 resistor is connected to the VBAT power supply terminal. The OUT_BCM end is an external connector, one end is externally connected to the MCU analog acquisition port of the body controller, and the other end is connected to R2 resistor 2 and R3 resistor 3 respectively. The other en...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an LED automobile steering lamp fault detection circuit and method. The fault detection circuit comprises a test circuit and a test method; the test circuit comprises a fault detection feedback circuit and a fault detection circuit; the fault detection circuit comprises an IN-LED end, an R1 resistor, an R2 resistor, an R3 resistor, a capacitor C, a VBAT power supply end andan OUT-BCM end; and the fault detection feedback circuit comprises an LED steering lamp externally connected with the IN-LED end of the fault detection circuit, and a BCM (body control model) connected with the OUT-BCM end through a feedback line. By identifying whether the IN-LED end is in high resistance rate or not and by judging the level states on the front and back feedback lines, the faultcondition of the LED steering lamp can be judged. An intelligent detection chip is not needed, so that low manufacturing cost and accurate fault detection are achieved.
Description
technical field [0001] The invention relates to the field of automobile electronics, in particular to an LED automobile turn signal fault detection circuit and a method thereof. Background technique [0002] With the continuous development of LED technology and the reduction of cost, LED lights are more and more used in automobiles. In order to ensure the safety of the car in the process of driving, the law stipulates that the turn signal of the car must be checked for faults from time to time, and a warning will be issued to avoid driving hazards caused by damage to the turn signal. But the detection method of the traditional turn signal is not suitable for LED fault detection. The traditional turn signal has high power, so its current changes greatly after power failure or failure, and the intelligent power chip can be used to obtain the fault information by detecting the feedback current. CN102452352 discloses "a detection control circuit and detection method of an LED ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityApplications(China)
IPC IPC(8): H05B33/08B60Q1/34H05B44/00
CPCB60Q1/34H05B45/50Y02B20/30
Inventor王晓伟周游徐瑛刘平涂径
OwnerCHONGQING CHANGAN AUTOMOBILE CO LTD