A vehicle light fault reporting system

Abstract

The present invention provides a vehicle light fault reporting system, comprising: a vehicle light module circuit, the vehicle light module circuit comprising a vehicle light module, a detection module, and a signal interface; the vehicle light module comprising a first terminal and a second terminal; the detection module capable of generating an open circuit fault signal upon a change in a first level at the first terminal, and capable of generating a short circuit fault signal upon a change in a second level at the second terminal; the detection module comprising a third terminal for outputting the open circuit fault signal and the short circuit fault signal; the signal interface comprising a fourth terminal, the third terminal being connected to the fourth terminal; and a vehicle body controller connected to the signal interface. The detection module of this vehicle light fault reporting system is capable of sending a signal to the vehicle body controller upon a change in the first level or the second level, so that the vehicle body controller receives a signal indicating a vehicle light fault when the vehicle light is in an open circuit fault or a short circuit fault.

Description

Technical Field

[0001] The present invention relates to the field of vehicle electronic technology, and in particular to a vehicle lamp fault reporting system. Background Art

[0002] Turn signals are essential components on vehicles. With the continuous advancement of technology, vehicle lighting systems are becoming increasingly complex. Currently, turn signals on the market generally only report open circuit faults, and often fail to report short circuit faults. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that the turn signal lamp only supports short circuit fault reporting, the present invention provides a lamp fault reporting system to solve the above problem.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a vehicle light fault reporting system, comprising:

[0005] A headlight module circuit, comprising a headlight module, a detection module, and a signal interface;

[0006] The vehicle light module includes a first endpoint and a second endpoint;

[0007] The detection module is connected to the vehicle light module, the detection module is capable of obtaining a first level of the first terminal and a second level of the second terminal, the detection module is capable of generating an open circuit error signal after the first level changes, and the detection module is capable of generating a short circuit error signal after the second level changes, and the detection module includes a third terminal for outputting the open circuit error signal and the short circuit error signal;

[0008] The signal interface includes an input voltage terminal, a fourth terminal, and a ground terminal, the input voltage terminal is connected to the vehicle light module, the third terminal is connected to the fourth terminal, and the ground terminal is grounded;

[0009] A vehicle body controller is connected to the signal interface.

[0010] Preferably, the detection module includes an open circuit detection module and a short circuit detection module;

[0011] The open circuit detection module includes a first switch module, the first switch module includes a first transistor, the base of the first transistor is a first detection terminal, the collector of the first transistor is grounded, the emitter of the first transistor is a first output terminal, the first detection terminal is connected to the first terminal, and the first output terminal is connected to the third terminal;

[0012] The short circuit detection module includes a reference voltage module and a second switch module;

[0013] The reference voltage module includes a controllable precision voltage stabilizing source, a first voltage stabilizing resistor, and a second voltage stabilizing resistor. The controllable precision voltage stabilizing source includes a first terminal, a second terminal, and a third terminal. The first terminal is the input terminal of the reference voltage module. The input terminal of the reference voltage module is the second detection terminal. The second detection terminal is connected to the second terminal.

[0014] The first terminal is connected to one end of the first voltage-stabilizing resistor, the second terminal is connected to the other end of the first voltage-stabilizing resistor, the other end of the first voltage-stabilizing resistor is connected to one end of the second voltage-stabilizing resistor, and the other end of the second voltage-stabilizing resistor is connected to the third terminal, and the third terminal is the output end of the reference voltage module;

[0015] The second switch module includes a second transistor, a third transistor, a pull-down resistor and a pull-up resistor; the base of the third transistor is the input end of the second switch module, and the input end of the second switch module is connected to the output end of the reference voltage module;

[0016] The base of the third transistor is connected to one end of the pull-down resistor, and the other end of the pull-down resistor is grounded; the emitter of the third transistor is grounded, and the collector of the third transistor is connected to the base of the second transistor; the base of the second transistor is connected to one end of the pull-up resistor, and the emitter of the second transistor is grounded, the collector of the second transistor is the output end of the second switch module, the output end of the second switch module is the second output endpoint, and the second output endpoint is connected to the third endpoint.

[0017] Preferably, the headlight module includes a driver chip and a headlight assembly;

[0018] The driver chip includes the first terminal and the second terminal;

[0019] One end of the headlight group is connected to the second end point, the other end of the headlight group is connected to one end of the first current control module, the other end of the current control module is connected to one end of the second current control module, and the other end of the second current control module is grounded.

[0020] Preferably, a voltage stabilizing module is provided between the third endpoint and the ground terminal.

[0021] Preferably, a first voltage protection module is provided between the input voltage endpoint and the ground endpoint.

[0022] Preferably, a second voltage protection module is provided between the fourth endpoint and the ground terminal.

[0023] Preferably, an anti-reverse connection module is provided between the input voltage endpoint and the ground terminal.

[0024] The beneficial effect of the present invention is that the detection module of this headlight fault reporting system can send an open circuit error signal to the body controller after the first level changes, and the detection module can send a short circuit error signal to the body controller after the second level changes, so that the body controller can receive signals indicating headlight faults when the headlights are in an open circuit fault or a short circuit fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and examples.

[0026] Figure 1 This is a system structure diagram of the optimal embodiment of a vehicle light fault reporting system of the present invention.

[0027] Figure 2 The present invention discloses an electrical schematic diagram of a headlight module circuit of a headlight fault reporting system. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] like Figures 1 and 2 As shown, the present invention provides a vehicle lamp fault reporting system, comprising:

[0032] The headlight module circuit includes a headlight module, a detection module and a signal interface.

[0033] The headlight module includes a driver chip and a headlight assembly.

[0034] In this embodiment, the vehicle light group includes multiple LED light groups connected in parallel, only one group is shown in the drawings, and each LED light group includes three LED lights arranged in series.

[0035] The driver chip is a constant current driver chip. In this embodiment, the driver chip model is TL4242.

[0036] The first pin of the driver chip is a PWM pin, which is connected to one end of resistor R10. The third pin of the driver chip is a ground pin. The eighth pin of the driver chip is an input pin. A capacitor C18 is provided between the third and eighth pins of the driver chip. The fifth pin of the driver chip is connected to one end of capacitor C15, the other end of which is grounded. The seventh pin of the driver chip is a floating pin.

[0037] The second pin of the driver chip is the ST pin, which is recorded as the first terminal in this embodiment. When an open circuit fault occurs in the LED lamp group, the voltage of the circuit where the faulty LED lamp group is located will increase, and the level of the first terminal will decrease.

[0038] The sixth pin of the driver chip is an output pin, which is referred to as the second endpoint in this embodiment. The second endpoint is connected to one end of the light assembly, and the other end of the light assembly is connected to one end of the first current control module. The other end of the first current control module is connected to one end of the second current control module, and the other end of the second current control module is connected to the ground pin. When the LED light assembly short-circuits, the voltage level at the second endpoint rises to a value greater than the short-circuit threshold.

[0039] The first current control module includes two resistor groups connected in series, each of which includes two resistors connected in parallel. In this embodiment, resistors R31 and R32 are connected in parallel, and resistors R30 and R19 are connected in parallel. The first current control module facilitates current control in the circuit where the headlight assembly resides while also providing heat dissipation.

[0040] The second current control module is a resistor R23 and a resistor R29 connected in parallel. The second current control module is used to adjust the magnitude of the current driving the headlight group. The resistor R23 and the resistor R29 set in parallel can facilitate developers to adjust the magnitude of the current driving the headlight group.

[0041] The detection module includes an open circuit detection module and a short circuit detection module.

[0042] The open circuit detection module includes a first switch module, which includes a first transistor Q1. In this embodiment, the first transistor Q1 is a PNP transistor. The base of the first transistor Q1 serves as a first detection terminal, which is connected to the first terminal. The emitter of the first transistor Q1 serves as a first output terminal, which is connected to the third terminal. The collector of the first transistor Q1 is grounded.

[0043] After an open circuit fault occurs in the headlight assembly, the level of the first terminal decreases, the level of the first detection terminal also decreases, the first transistor Q1 is turned on, and the first transistor Q1 outputs an open circuit error signal through the first output terminal, and the open circuit error signal is transmitted after passing through the third terminal.

[0044] The short circuit detection module includes a reference voltage module and a second switch module.

[0045] The reference voltage module includes a controllable precision voltage-stabilizing source, a first voltage-stabilizing resistor R24, and a second voltage-stabilizing resistor R18. In this embodiment, the model of the controllable precision voltage-stabilizing source is TL431. The controllable precision voltage-stabilizing source includes a cathode designated as terminal 1, a reference electrode designated as terminal 2, and an anode designated as terminal 3. The cathode of the controllable precision voltage-stabilizing source serves as the second detection terminal, and the second detection terminal is connected to the second terminal. One end of the first voltage-stabilizing resistor R24 ​​is connected to the cathode of the controllable precision voltage-stabilizing source, the reference electrode of the controllable precision voltage-stabilizing source is connected to the other end of the first voltage-stabilizing resistor R24, the other end of the first voltage-stabilizing resistor R24 ​​is connected to one end of the second voltage-stabilizing resistor R18, and the other end of R18 is connected to the anode of the controllable precision voltage-stabilizing source.

[0046] Developers can change the short-circuit threshold by changing the size of the first stabilizing resistor R24 ​​and the size of the second stabilizing resistor R18. In this embodiment, the short-circuit threshold is 2.5V.

[0047] The second switch module includes a second transistor Q2, a third transistor Q3, a resistor R18A, a pull-down resistor R18B, and a pull-up resistor R15.

[0048] One end of resistor R18A is connected to the anode of the controllable precision voltage regulator, one end of pull-down resistor R18B is connected to the anode of the controllable precision voltage regulator, and the other end of pull-down resistor R18B is grounded. In this embodiment, the second transistor Q2 and the third transistor Q3 are both NPN transistors. The base of the third transistor Q3 is connected to the other end of resistor R18A, the emitter of the third transistor Q3 is grounded, and the collector of the third transistor Q3 is connected to the base of the second transistor Q2. The base of the second transistor Q2 is connected to one end of pull-up resistor R15, the emitter of the second transistor Q2 is grounded, and the collector of the second transistor Q2 serves as a second output terminal, which is connected to the third terminal.

[0049] In this embodiment, a voltage stabilizing module is provided between the third endpoint and the ground terminal. The voltage stabilizing module includes a voltage stabilizing diode ZD1. The third endpoint is connected to the cathode of the voltage stabilizing diode ZD1, and the anode of the voltage stabilizing diode ZD1 is grounded. The voltage stabilizing diode ZD1 is capable of controlling the voltage range at the third endpoint.

[0050] The signal interface includes an input voltage terminal, a fourth terminal, and a ground terminal. In this embodiment, the signal interface is J1.

[0051] The input voltage endpoint is the T1 pin of J1, which is connected to one end of the inductor FB1, and the other end of the inductor FB1 is connected to the anode of the diode D1. The cathode of the diode D1 is connected to the other end of the resistor R10 and the input pin.

[0052] The cathode of the diode D1 is connected to one end of the resistor R1 , the other end of the resistor R1 is connected to the anode of the diode D3 , and the cathode of the diode D3 is connected to the base of the first transistor Q1 .

[0053] The cathode of the diode D1 is connected to one end of the resistor R4 , the other end of the resistor R4 is connected to the anode of the diode D4 , and the cathode of the diode D4 is connected to the collector of the second transistor Q2 .

[0054] The cathode of the diode D1 is connected to the base of the second transistor Q2.

[0055] The cathode of the diode D1 is connected to the other end of the pull-up resistor R15 .

[0056] When a short circuit occurs in the headlight assembly, the voltage level at the second terminal rises to a value greater than the short-circuit threshold. The voltage level at the second detection terminal also rises to a value greater than the short-circuit threshold. The third transistor Q3 is turned off due to the pull-down function of pull-down resistor R18B, while the second transistor Q2 is turned on due to the pull-up function of resistor R15. The second transistor Q2 outputs a short-circuit error signal through the second output terminal, which is then transmitted through the third terminal.

[0057] In this embodiment, a first voltage protection module and an anti-reverse connection module are provided between the input voltage terminal and the ground terminal.

[0058] The first voltage protection module includes capacitor C1, capacitor C2, resistor R5, and resistor R6. Resistors R5 and R6 are connected in parallel, with one end of resistor R5 connected to the input voltage endpoint and the other end of resistor R5 grounded. One end of capacitor C1 is connected to the input voltage endpoint, the other end of capacitor C1 is connected to capacitor C2, and the other end of capacitor C2 is grounded.

[0059] The first voltage protection module can protect the vehicle light module and the detection module when the voltage at the input voltage terminal is too large.

[0060] The reverse connection protection module includes a bidirectional voltage regulator D2, one end of which is connected to the input voltage terminal and the other end of which is grounded. This module protects the circuit if the operator incorrectly connects the input voltage terminal and the ground terminal of the signal interface.

[0061] The fourth terminal is the FB pin of J1 , and the fourth terminal is connected to the third terminal. The short circuit error signal and the open circuit error signal transmitted from the third terminal are transmitted through the fourth terminal.

[0062] In this embodiment, a second voltage protection module is provided between the fourth terminal and the ground terminal. The second voltage protection module includes a capacitor C13 and a bidirectional voltage regulator D5. One end of the capacitor C13 is connected to the fourth terminal, and the other end of the capacitor C13 is grounded. One end of the bidirectional voltage regulator D5 is connected to the fourth terminal, and the other end of the bidirectional voltage regulator D5 is grounded. The second voltage protection module provides input surge protection.

[0063] The ground terminal is the GND pin of J1, and the ground terminal is grounded.

[0064] The body controller is connected to the signal interface, and a short-circuit error signal and an open-circuit error signal are transmitted to the body controller via the fourth terminal. In this embodiment, the short-circuit error signal and the open-circuit error signal are both at a low level. Upon receiving the short-circuit error signal and the open-circuit error signal, the body controller can change the flashing frequency of the LED lights in the non-faulty LED light group in the vehicle light assembly, causing the LED lights in the non-faulty LED light group to flash faster, thereby implementing the error reporting function.

[0065] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0066] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A vehicle lamp fault reporting system, characterized in that: include: A headlight module circuit, comprising a headlight module, a detection module, and a signal interface; The vehicle light module includes a first endpoint and a second endpoint; The detection module is connected to the vehicle light module, the detection module is capable of obtaining a first level of the first terminal and a second level of the second terminal, the detection module is capable of generating an open circuit error signal after the first level changes, and the detection module is capable of generating a short circuit error signal after the second level changes, and the detection module includes a third terminal for outputting the open circuit error signal and the short circuit error signal; The detection module includes an open circuit detection module and a short circuit detection module; The open circuit detection module includes a first switch module, the first switch module includes a first transistor, the base of the first transistor is a first detection terminal, the collector of the first transistor is grounded, the emitter of the first transistor is a first output terminal, the first detection terminal is connected to the first terminal, and the first output terminal is connected to the third terminal; The collector of the first transistor is grounded; When an open circuit fault occurs in the headlight assembly, the voltage level of the first terminal decreases, the voltage level of the first detection terminal also decreases, the first transistor is turned on, and the first transistor outputs an open circuit fault signal through the first output terminal. The open circuit fault signal is then transmitted through the third terminal. The short circuit detection module includes a reference voltage module and a second switch module; The reference voltage module includes a controllable precision voltage stabilizing source, a first voltage stabilizing resistor, and a second voltage stabilizing resistor. The controllable precision voltage stabilizing source includes a first terminal, a second terminal, and a third terminal. The first terminal is the input terminal of the reference voltage module. The input terminal of the reference voltage module is the second detection terminal. The second detection terminal is connected to the second terminal. Changing the short-circuit threshold by changing the size of the first voltage-stabilizing resistor and the size of the second voltage-stabilizing resistor; The first terminal is connected to one end of the first voltage-stabilizing resistor, the second terminal is connected to the other end of the first voltage-stabilizing resistor, the other end of the first voltage-stabilizing resistor is connected to one end of the second voltage-stabilizing resistor, and the other end of the second voltage-stabilizing resistor is connected to the third terminal, and the third terminal is the output end of the reference voltage module; The second switch module includes a second transistor, a third transistor, a pull-down resistor and a pull-up resistor; the base of the third transistor is the input end of the second switch module, and the input end of the second switch module is connected to the output end of the reference voltage module; The base of the third transistor is connected to one end of the pull-down resistor, and the other end of the pull-down resistor is grounded; the emitter of the third transistor is grounded, and the collector of the third transistor is connected to the base of the second transistor; the base of the second transistor is connected to one end of the pull-up resistor, and the emitter of the second transistor is grounded, the collector of the second transistor is the output end of the second switch module, the output end of the second switch module is the second output endpoint, and the second output endpoint is connected to the third endpoint; After a short circuit occurs in the headlight assembly, the voltage level at the second endpoint increases to a value greater than the short circuit threshold, and the voltage level at the second detection endpoint also increases to a value greater than the short circuit threshold. The third transistor is in a cut-off state, and the second transistor is in a conducting state. The second transistor outputs a short circuit error signal through the second output endpoint, and the short circuit error signal is transmitted through the third endpoint. The signal interface includes an input voltage terminal, a fourth terminal, and a ground terminal, the input voltage terminal is connected to the vehicle light module, the third terminal is connected to the fourth terminal, and the ground terminal is grounded; A vehicle body controller is connected to the signal interface.

2. The vehicle light fault reporting system according to claim 1, characterized in that: The headlight module includes a driver chip and a headlight assembly; The driver chip includes the first terminal and the second terminal; One end of the headlight group is connected to the second end point, the other end of the headlight group is connected to one end of the first current control module, the other end of the current control module is connected to one end of the second current control module, and the other end of the second current control module is grounded.

3. The vehicle light fault reporting system according to claim 1, characterized in that: A voltage stabilizing module is provided between the third endpoint and the ground terminal.

4. The vehicle light fault reporting system according to claim 1, characterized in that: A first voltage protection module is provided between the input voltage terminal and the ground terminal.

5. The vehicle light fault reporting system according to claim 1, characterized in that: A second voltage protection module is provided between the fourth end point and the ground end point.

6. The vehicle light fault reporting system according to claim 1, characterized in that: An anti-reverse connection module is provided between the input voltage terminal and the ground terminal.

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