Light signal conversion head

Abstract

The utility model discloses a light signal conversion head. The light signal sampling part is used for collecting input light signals, and the single chip microcomputer is used for controlling the light signal output part to output control light signals, so that conversion between the light signals of two standards is realized, the light signals of different standards are unified and consistent, and the driving safety is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting signal conversion, in particular to a lighting signal conversion head. Background Art

[0002] With the increase in the number of imported vehicles, vehicles equipped with trailer sockets with lighting standards in the North American market have entered the market, providing consumers with more choices. Moreover, vehicles in the North American market have large displacements and sufficient horsepower, with strong towing capabilities to tow various towed recreational vehicles, trailers, etc. However, the functions of vehicles with North American market standards are very different from those of vehicles with European market standards and Chinese market standards. Specifically, the vehicle lighting and towing vehicle sockets in the North American market are in accordance with the SAE J2863 standard, the vehicle lighting and towing sockets in the European market are in accordance with the ISO 11446 standard, and the vehicle lighting and towing sockets in the Chinese market are in accordance with the GB / T 20718 standard, which is equivalent to adopting the ISO 11446 standard in the European market. The SAE J2863 standard and the ISO 11446 standard are not compatible in terms of the functional system. Specifically, the functional differences mainly include:

[0003] First, the differences in turn signals and brake lights of the SAE J2863 standard. Its left and right turn signals and brake lights respectively share a common pin, and the left turn signal, left brake light, right turn signal, and right brake light are each replaced by one light, that is, the left brake light and the right brake light, which are completely different from the left turn, right turn, and brake lights that are independent of each other in the ISO 11446 and GB / T 20718 standards.

[0004] Second, the difference in fog lights. The American trailer socket does not have a fog light function pin.

[0005] It can be seen that if a customer uses a vehicle with a Central European standard to tow a trailer with a vehicle in the North American market, it will cause the lights of the trailer to be disordered, seriously increasing the potential safety hazards during driving. Content of the Utility Model

[0006] By providing a lighting signal conversion head, the utility model realizes the technical effect of being able to make different standard lighting signals unified and consistent, greatly increasing driving safety.

[0007] The utility model provides a lighting signal conversion head, comprising: a first resistor, a second resistor, a third resistor, a first single-chip microcomputer, a second single-chip microcomputer, a third single-chip microcomputer, a fourth single-chip microcomputer, a fifth single-chip microcomputer, a first triode, a second triode, a third triode and a fourth triode; a first end of the first resistor is connected to a left brake light signal output end of a tractor lighting socket, and a second end of the first resistor is connected to a first signal input pin of the first single-chip microcomputer; a first signal output pin of the first single-chip microcomputer is connected to a base of the first triode, and an emitter of the first triode is grounded; a collector of the first triode is connected to a signal input pin of the second single-chip microcomputer; a signal output pin of the second single-chip microcomputer is connected to a left turn signal input end of a trailer lighting socket; a first end of the second resistor is connected to a right brake light signal output end of the tractor lighting socket, and a second end of the second resistor is connected to a second signal input pin of the first single-chip microcomputer; a second signal output pin of the first single-chip microcomputer is connected to a base of the second triode, and an emitter of the second triode is grounded; a collector of the second triode is connected to a signal input end of the third single-chip microcomputer; a signal output pin of the third single-chip microcomputer is connected to a right turn signal input end of the trailer lighting socket; a first end of the third resistor is connected to a width indicator light signal output end of the tractor lighting socket, and a second end of the third resistor is connected to a third signal input pin of the first single-chip microcomputer; a third signal output pin of the first single-chip microcomputer is connected to a base of the third triode, and an emitter of the third triode is grounded; a collector of the third triode is connected to a signal input end of the fourth single-chip microcomputer; a signal output pin of the fourth single-chip microcomputer is connected to a brake light signal input end of the trailer lighting socket; a fourth signal input pin of the first single-chip microcomputer is connected to a base of the fourth triode, and an emitter of the fourth triode is grounded; a collector of the fourth triode is connected to a signal input end of the fifth single-chip microcomputer; a signal output pin of the fifth single-chip microcomputer is connected to a rear fog light signal input end of the trailer lighting socket; a current detection input pin of the first single-chip microcomputer is connected to current detection output pins of the second single-chip microcomputer, the third single-chip microcomputer, the fourth single-chip microcomputer and the fifth single-chip microcomputer.

[0008] Specifically, it further includes: a first diode, a second diode, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor and a second capacitor; the positive electrode of the first diode is connected between the left brake light signal output terminal of the tractor lighting socket and the first end of the first resistor, and the negative electrode of the first diode is connected to the power supply; the first end of the fourth resistor is connected to the positive electrode of the first diode, and the second end of the fourth resistor is grounded; the first ends of the fifth resistor and the first capacitor are both connected to the second end of the first resistor, and the second ends of the fifth resistor and the first capacitor are both grounded; the positive electrode of the second diode is grounded, and the negative electrode of the second diode is connected to the second end of the first resistor; the sixth resistor and the second capacitor are connected in parallel to form a first parallel circuit; the first end of the first parallel circuit is connected to the signal output pin of the second single-chip microcomputer, and the second end of the first parallel circuit is grounded.

[0009] Specifically, it further includes: a third diode, a fourth diode, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor and a fourth capacitor; the positive electrode of the third diode is connected between the right brake light signal output terminal of the tractor lighting socket and the first end of the second resistor, and the negative electrode of the third diode is connected to the power supply; the first end of the seventh resistor is connected to the positive electrode of the third diode, and the second end of the seventh resistor is grounded; the first ends of the eighth resistor and the third capacitor are both connected to the second end of the second resistor, and the second ends of the eighth resistor and the third capacitor are both grounded; the positive electrode of the fourth diode is grounded, and the negative electrode of the fourth diode is connected to the second end of the second resistor; the ninth resistor and the fourth capacitor are connected in parallel to form a second parallel circuit; the first end of the second parallel circuit is connected to the signal output pin of the third single-chip microcomputer, and the second end of the second parallel circuit is grounded.

[0010] Specifically, it further includes: a fifth diode, a sixth diode, a tenth resistor, an eleventh resistor, a twelfth resistor, a fifth capacitor and a sixth capacitor; the positive electrode of the fifth diode is connected between the width indicator light signal output terminal of the tractor lighting socket and the first end of the third resistor, and the negative electrode of the fifth diode is connected to the power supply; the first end of the tenth resistor is connected to the positive electrode of the fifth diode, and the second end of the tenth resistor is grounded; the first ends of the eleventh resistor and the fifth capacitor are both connected to the second end of the third resistor, and the second ends of the eleventh resistor and the fifth capacitor are both grounded; the positive electrode of the sixth diode is grounded, and the negative electrode of the sixth diode is connected to the second end of the third resistor; the twelfth resistor and the sixth capacitor are connected in parallel to form a third parallel circuit; the first end of the third parallel circuit is connected to the signal output pin of the fourth single-chip microcomputer, and the second end of the third parallel circuit is grounded.

[0011] Specifically, it further includes: a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a fifth triode, a seventh capacitor, an eighth capacitor, and a sixth single-chip microcomputer; the power input terminal of the sixth single-chip microcomputer is connected to the power output port; the first end of the fifteenth resistor is connected to the level output pin of the first single-chip microcomputer, the second end of the fifteenth resistor is connected to the base of the fifth triode, and the emitter of the fifth triode is grounded; the collector of the fifth triode is connected to the signal input terminal of the sixth single-chip microcomputer; the sixteenth resistor and the eighth capacitor are connected in parallel to form a fourth parallel circuit; the first end of the fourth parallel circuit is connected to the power output end of the sixth single-chip microcomputer, and the first end of the fourth parallel circuit is grounded; the first end of the thirteenth resistor is connected to the power output port, the second end of the thirteenth resistor is connected to the first ends of the fourteenth resistor and the seventh capacitor, and the second end of the thirteenth resistor is also connected to the voltage acquisition pin of the first single-chip microcomputer; the second ends of the fourteenth resistor and the seventh capacitor are grounded.

[0012] Specifically, it further includes: a voltage conversion circuit; the power input terminal of the voltage conversion circuit is connected to the power supplies of the second single-chip microcomputer, the third single-chip microcomputer, the fourth single-chip microcomputer, and the fifth single-chip microcomputer, and the power output terminal of the voltage conversion circuit is connected to the power input terminal of the first single-chip microcomputer.

[0013] Specifically, the voltage conversion circuit includes: a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a seventeenth resistor, and a seventh single-chip microcomputer; the ninth capacitor, the tenth capacitor, and the eleventh capacitor are connected in parallel to form a fifth parallel circuit, and the twelfth capacitor, the thirteenth capacitor, and the fourteenth capacitor are connected in parallel to form a sixth parallel circuit; the first end of the fifth parallel circuit is connected to the power supply and the power input terminal of the seventh single-chip microcomputer, and the second end of the fifth parallel circuit is grounded; the first end of the seventeenth resistor is connected to the power supply, and the second end of the seventeenth resistor is connected to the enable terminal of the seventh single-chip microcomputer; the first end of the sixth parallel circuit is connected to the power output end of the seventh single-chip microcomputer, and the second end of the sixth parallel circuit is grounded.

[0014] Specifically, the model of the first single-chip microcomputer is STM8S003F3U6TR of STMicroelectronics, and the models of the second single-chip microcomputer, the third single-chip microcomputer, the fourth single-chip microcomputer, the fifth single-chip microcomputer, and the sixth single-chip microcomputer are all BTS6143D of Infineon Technologies, and the model of the seventh single-chip microcomputer is TPS70933DBVR of Texas Instruments.

[0015] One or more technical solutions provided in the present utility model have at least the following technical effects or advantages:

[0016] The input light signal is collected by the light signal sampling part, and the control light signal is output by the microcontroller to control the light signal output part, so as to realize the conversion between two standard light signals, make the light signals of different standards unified and consistent, and greatly increase the driving safety. Brief Description of the Drawings

[0017] Figure 1 It is the overall structural block diagram of the light signal converter provided by the embodiment of the present invention;

[0018] Figure 2 It is the circuit diagram of the light signal sampling part in the light signal converter provided by the embodiment of the present invention;

[0019] Figure 3 It is the circuit diagram of the first microcontroller U1 in the light signal converter provided by the embodiment of the present invention;

[0020] Figure 4 It is the circuit diagram of the light signal output part in the light signal converter provided by the embodiment of the present invention;

[0021] Figure 5 It is the circuit diagram of the voltage detection part in the light signal converter provided by the embodiment of the present invention;

[0022] Figure 6 It is the circuit diagram of the voltage conversion circuit in the light signal converter provided by the embodiment of the present invention. Detailed Embodiment

[0023] The embodiment of the present invention provides a light signal converter, which realizes the technical effect of making the light signals of different standards unified and consistent, and greatly increases the driving safety.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0025] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4, the light signal converter provided by the embodiment of the present utility model includes: a first resistor R1, a second resistor R2, a third resistor R3, a first single-chip microcomputer U1, a second single-chip microcomputer U2, a third single-chip microcomputer U3, a fourth single-chip microcomputer U4, a fifth single-chip microcomputer U5, a first triode Q1, a second triode Q2, a third triode Q3 and a fourth triode Q4; the first end of the first resistor R1 is connected to the left brake light signal output terminal LT&STOP of the tractor light socket, and the second end of the first resistor R1 is connected to the first signal input pin of the first single-chip microcomputer U1; the first signal output pin of the first single-chip microcomputer U1 is connected to the base of the first triode Q1, and the emitter of the first triode Q1 is grounded; the collector of the first triode Q1 is connected to the signal input pin of the second single-chip microcomputer U2; the signal output pin of the second single-chip microcomputer U2 is connected to the left turn signal input terminal LT of the trailer light socket; the first end of the second resistor R2 is connected to the right brake light signal output terminal RT&STOP of the tractor light socket, and the second end of the second resistor R2 is connected to the second signal input pin of the first single-chip microcomputer U1; the second signal output pin of the first single-chip microcomputer U1 is connected to the base of the second triode Q2, and the emitter of the second triode Q2 is grounded; the collector of the second triode Q2 is connected to the signal input terminal of the third single-chip microcomputer U3; the signal output pin of the third single-chip microcomputer U3 is connected to the right turn signal input terminal RT of the trailer light socket; the first end of the third resistor R3 is connected to the width indicator light signal output terminal T / M of the tractor light socket, and the second end of the third resistor R3 is connected to the third signal input pin of the first single-chip microcomputer U1; the third signal output pin of the first single-chip microcomputer U1 is connected to the base of the third triode Q3, and the emitter of the third triode Q3 is grounded; the collector of the third triode Q3 is connected to the signal input terminal of the fourth single-chip microcomputer U4; the signal output pin of the fourth single-chip microcomputer U4 is connected to the brake light signal input terminal STOP of the trailer light socket; the fourth signal input pin of the first single-chip microcomputer U1 is connected to the base of the fourth triode Q4, and the emitter of the fourth triode Q4 is grounded; the collector of the fourth triode Q4 is connected to the signal input terminal of the fifth single-chip microcomputer U5; the signal output pin of the fifth single-chip microcomputer U5 is connected to the rear fog light signal input terminal FOG of the trailer light socket. The current detection input pin LS of the first single-chip microcomputer U1 is connected to the current detection output pins IS of the second single-chip microcomputer U2, the third single-chip microcomputer U3, the fourth single-chip microcomputer U4 and the fifth single-chip microcomputer U5. The first single-chip microcomputer U1 matches the received input signal with the pre-stored comparison data and outputs the matched control signal, thereby realizing the conversion between light signals. The first end of the bidirectional diode D7 is connected to the positive power supply, and the second end of the bidirectional diode D7 is grounded; the positive electrode of the eighth diode D8 is connected to the positive power supply, and the negative electrode of the eighth diode D8 is connected to the negative power supply.

[0026] The circuit structure for signal conversion of the left turn signal is further described, and it further includes: the first diode D1, the second diode D2, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the first capacitor C1, and the second capacitor C2; the positive electrode of the first diode D1 is connected between the left brake light signal output terminal LT&STOP of the tractor lighting socket and the first end of the first resistor R1, and the negative electrode of the first diode D1 is connected to the power supply; the first end of the fourth resistor R4 is connected to the positive electrode of the first diode D1, and the second end of the fourth resistor R4 is grounded; the first ends of the fifth resistor R5 and the first capacitor C1 are both connected to the second end of the first resistor R1, and the second ends of the fifth resistor R5 and the first capacitor C1 are both grounded; the positive electrode of the second diode D2 is grounded, and the negative electrode of the second diode D2 is connected to the second end of the first resistor R1; the sixth resistor R6 and the second capacitor C2 are connected in parallel to form a first parallel circuit; the first end of the first parallel circuit is connected to the signal output pin of the second microcontroller U2, and the second end of the first parallel circuit is grounded.

[0027] The circuit structure for signal conversion of the right turn signal is further described, and it further includes: the third diode D3, the fourth diode D4, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the third capacitor C3, and the fourth capacitor C4; the positive electrode of the third diode D3 is connected between the right brake light signal output terminal RT&STOP of the tractor lighting socket and the first end of the second resistor R2, and the negative electrode of the third diode D3 is connected to the power supply; the first end of the seventh resistor R7 is connected to the positive electrode of the third diode D3, and the second end of the seventh resistor R7 is grounded; the first ends of the eighth resistor R8 and the third capacitor C3 are both connected to the second end of the second resistor R2, and the second ends of the eighth resistor R8 and the third capacitor C3 are both grounded; the positive electrode of the fourth diode D4 is grounded, and the negative electrode of the fourth diode D4 is connected to the second end of the second resistor R2; the ninth resistor R9 and the fourth capacitor C4 are connected in parallel to form a second parallel circuit; the first end of the second parallel circuit is connected to the signal output pin of the third microcontroller U3, and the second end of the second parallel circuit is grounded.

[0028] A further description of the circuit structure for signal conversion of the width indicator light is as follows. It further includes: a fifth diode D5, a sixth diode D6, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fifth capacitor C5, and a sixth capacitor C6. The positive electrode of the fifth diode D5 is connected between the width indicator light signal output terminal T / M of the tractor's lighting socket and the first end of the third resistor R3, and the negative electrode of the fifth diode D5 is connected to the power supply. The first end of the tenth resistor R10 is connected to the positive electrode of the fifth diode D5, and the second end of the tenth resistor R10 is grounded. The first ends of the eleventh resistor R11 and the fifth capacitor C5 are both connected to the second end of the third resistor R3, and the second ends of the eleventh resistor R11 and the fifth capacitor C5 are both grounded. The positive electrode of the sixth diode D6 is grounded, and the negative electrode of the sixth diode D6 is connected to the second end of the third resistor R3. The twelfth resistor R12 and the sixth capacitor C6 are connected in parallel to form a third parallel circuit. The first end of the third parallel circuit is connected to the signal output pin of the fourth microcontroller U4, and the second end of the third parallel circuit is grounded.

[0029] A specific description of the voltage detection part in the embodiments of the present invention is as follows. Refer to Figure 5 It further includes: a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a fifth triode Q5, a seventh capacitor C7, an eighth capacitor C8, and a sixth microcontroller U6. The power input terminal of the sixth microcontroller U6 is connected to the power output port AX. The first end of the fifteenth resistor R15 is connected to the level output pin IO7 of the first microcontroller U1, the second end of the fifteenth resistor R15 is connected to the base of the fifth triode Q5, and the emitter of the fifth triode Q5 is grounded. The collector of the fifth triode Q5 is connected to the signal input terminal of the sixth microcontroller U6. The sixteenth resistor R16 and the eighth capacitor C8 are connected in parallel to form a fourth parallel circuit. The first end of the fourth parallel circuit is connected to the power output terminal of the sixth microcontroller U6, and the first end of the fourth parallel circuit is grounded. The first end of the thirteenth resistor R13 is connected to the power output port AX, the second end of the thirteenth resistor R13 is connected to the first ends of the fourteenth resistor R14 and the seventh capacitor C7, and the second end of the thirteenth resistor R13 is also connected to the voltage acquisition pin ADC0 of the first microcontroller U1. The second ends of the fourteenth resistor R14 and the seventh capacitor C7 are grounded.

[0030] A specific description of the voltage conversion part in the embodiments of the present invention is as follows. It further includes: a voltage conversion circuit. The power input terminal of the voltage conversion circuit is connected to the power supplies of the second microcontroller U2, the third microcontroller U3, the fourth microcontroller U4, and the fifth microcontroller U5, and the power output terminal of the voltage conversion circuit is connected to the power input terminal of the first microcontroller U1.

[0031] For a specific description of the structure of the voltage conversion circuit, refer to Figure 6, the voltage conversion circuit includes: the ninth capacitor C9, the tenth capacitor C10, the eleventh capacitor C11, the twelfth capacitor C12, the thirteenth capacitor C13, the fourteenth capacitor C14, the seventeenth resistor R17, and the seventh single-chip microcomputer U7; the ninth capacitor C9, the tenth capacitor C10, and the eleventh capacitor C11 are connected in parallel to form a fifth parallel circuit, and the twelfth capacitor C12, the thirteenth capacitor C13, and the fourteenth capacitor C14 are connected in parallel to form a sixth parallel circuit; the first end of the fifth parallel circuit is connected to the power supply and the power input terminal of the seventh single-chip microcomputer U7, and the second end of the fifth parallel circuit is grounded; the first end of the seventeenth resistor R17 is connected to the power supply, and the second end of the seventeenth resistor R17 is connected to the enable terminal EN of the seventh single-chip microcomputer U7; the first end of the sixth parallel circuit is connected to the power output terminal of the seventh single-chip microcomputer U7, and the second end of the sixth parallel circuit is grounded.

[0032] In this embodiment, the voltage conversion circuit converts the 12V voltage into a 3.3V voltage. The 3.3V voltage powers the first single-chip microcomputer U1, and the 12V voltage powers the rest.

[0033] Specifically describing the power supply part for the first single-chip microcomputer U1, it also includes: the eighteenth resistor R18, the fifteenth capacitor C15, the sixteenth capacitor C16, and the seventeenth capacitor C17; the first end of the fifteenth capacitor C15 is grounded, the second end of the fifteenth capacitor C15 is connected to the first end of the eighteenth resistor R18, and the second end of the eighteenth resistor R18 is connected to the power supply; the reset pin NRST of the first single-chip microcomputer U1 is connected between the fifteenth capacitor C15 and the eighteenth resistor R18; the sixteenth capacitor C16 is connected between the power supply pin VSS of the first single-chip microcomputer U1 and the power supply; the first end of the seventeenth capacitor C17 is connected to the capacitor pin VCAP of the first single-chip microcomputer U1, and the second end of the seventeenth capacitor C17 is grounded.

[0034] In this embodiment, the model of the first single-chip microcomputer U1 is STM8S003F3U6TR of STMicroelectronics, and the models of the second single-chip microcomputer U2, the third single-chip microcomputer U3, the fourth single-chip microcomputer U4, the fifth single-chip microcomputer U5, and the sixth single-chip microcomputer U6 are all BTS6143D of Infineon Technologies, and the model of the seventh single-chip microcomputer U7 is TPS70933DBVR of Texas Instruments.

[0035] The pins of the SAE J2863 standard and the ISO 11446 (GB / T 20718) standard are specifically described below:

[0036] The SAE J2863 standard tractor-trailer socket has a total of 7 pins inside, and the functions of each pin are as follows:

[0037] LT pin - left turn signal & left brake light

[0038] RT Pin - Right Turn Signal & Right Brake Light

[0039] T / M Pin - Parking Light

[0040] BU Pin - Reverse Light

[0041] EB Pin - Electromagnetic Brake Wire

[0042] AX Pin - 12V Power Supply

[0043] GD Pin - Ground Wire

[0044] The ISO 11446 and GB / T 20718 standard tractor - trailer socket has a total of 13 pins, and the functions of each pin are as follows:

[0045] Pin 1 - Left Turn Signal

[0046] Pin 2 - Rear Fog Light

[0047] Pin 3 - Ground Wire

[0048] Pin 4 - Right Turn Signal

[0049] Pin 5 - Right Parking Light

[0050] Pin 6 - Brake Light

[0051] Pin 7 - Left Parking Light

[0052] Pin 8 - Reverse Light

[0053] Pin 9 - 12V Power Supply

[0054] Pin 10 - 12V - ACC Power Supply

[0055] Pin 11 - Ground Wire

[0056] Pin 12 - Electromagnetic Brake Wire

[0057] Pin 13 - Ground Wire

[0058] The working principle of the lighting signal conversion head provided by the embodiments of the present utility model will be specifically described below:

[0059] Left turn signal: When the tractor turns on the left turn signal switch, the left brake light LT&STOP of the tractor's lighting socket inputs 12V voltage. After passing through the first diode D1, it supplies power to the seventh single-chip microcomputer U7, the first single-chip microcomputer U1, the second single-chip microcomputer U2, the third single-chip microcomputer U3 MOS transistor, and the eighth diode D8 to output 12V converted to 3.3V to supply power to the single-chip microcomputer. After the single-chip microcomputer gets power supply, it starts to work. At the same time, the 12V voltage input by the left brake light LT&STOP of the tractor's lighting socket is shunted, divided, filtered, and regulated to 3.3V through components such as the fourth resistor R4, the first resistor R1, the fifth resistor R5, the first capacitor C1, and the second diode D2 to provide instructions for the IO0 interface of the single-chip microcomputer. After the IO0 port of the single-chip microcomputer receives a high level, the IO3 port outputs a high level, which is limited in current by the resistor RN1 and supplied to the base of the first triode Q1. The collector of the first triode Q1 conducts and turns on, pulling down the high level of the INPUT3 pin of the second single-chip microcomputer U2. The second single-chip microcomputer U2 starts to output, and the voltage of the left turn signal LT of the trailer lighting socket changes from 0V to 12V to drive the trailer left turn signal to work.

[0060] Right turn signal: When the tractor turns on the right turn signal switch, the right brake light RT&STOP of the tractor's lighting socket inputs 12V voltage. After passing through the third diode D3, it supplies power to the seventh single-chip microcomputer U7, the first single-chip microcomputer U1, the second single-chip microcomputer U2, the third single-chip microcomputer U3 MOS transistor, and the eighth diode D8 to output 12V converted to 3.3V to supply power to the single-chip microcomputer. After the single-chip microcomputer gets power supply, it starts to work. At the same time, the 12V voltage input by the right brake light RT&STOP of the tractor's lighting socket is shunted, divided, filtered, and regulated to 3.3V through components such as the seventh resistor R7, the second resistor R2, the eighth resistor R8, the third capacitor C3, and the fourth diode D4 to provide instructions for the IO1 interface of the single-chip microcomputer. After the IO1 port of the single-chip microcomputer receives a high level, the IO4 port outputs a high level, which is limited in current by the resistor RN2 and supplied to the base of the second triode Q2. The collector of the second triode Q2 conducts and turns on, pulling down the high level of the INPUT4 pin of the third single-chip microcomputer U3. The third single-chip microcomputer U3 starts to output, and the voltage of the right turn signal RT of the trailer lighting socket changes from 0V to 12V to drive the trailer right turn signal to work.

[0061] Brake light: When the tractor steps on the brake pedal, the left brake light LT&STOP of the tractor lighting socket and the right brake light RT&STOP of the tractor lighting socket simultaneously receive 12V voltage. The voltage passes through the first diode D1 and the third diode D3 to supply power to the seventh single-chip microcomputer U7, the first single-chip microcomputer U1, the second single-chip microcomputer U2, the third single-chip microcomputer U3 MOS transistor, and the eighth diode D8 to convert 12V to 3.3V for power supply output to the single-chip microcomputer. After the single-chip microcomputer gets power supply, it starts to work. At the same time, the 12V voltage input by the left brake light LT&STOP of the tractor lighting socket and the right brake light RT&STOP of the tractor lighting socket passes through components such as the fourth resistor R4, the seventh resistor R7, the first resistor R1, the fifth resistor R5, the second resistor R2, the eighth resistor R8, the first capacitor C1, the third capacitor C3, the second diode D2, and the fourth diode D4 for current shunting, voltage division, filtering, and voltage stabilization to 3.3V to provide instructions for the IO0 and IO1 interfaces of the single-chip microcomputer. After the IO0 and IO1 ports of the single-chip microcomputer receive high level, the IO5 port outputs high level. After current limiting by the resistor RN3, it supplies power to the base of the third triode Q3. The collector of the third triode Q3 conducts and turns on, pulling down the high level of the INPUT5 pin of the fourth single-chip microcomputer U4. The fourth single-chip microcomputer U4 starts to output, and the brake light STOP voltage of the trailer lighting socket changes from 0V to 12V to drive the trailer brake light to work.

[0062] Turn on the left turn signal after stepping on the brake: When the tractor steps on the brake pedal, the left brake light LT&STOP of the tractor lighting socket and the right brake light RT&STOP of the tractor lighting socket simultaneously receive 12V voltage. Through the first diode D1 and the third diode D3, it supplies power to the seventh single-chip microcomputer U7, the first single-chip microcomputer U1, the second single-chip microcomputer U2, the third single-chip microcomputer U3 MOS tube, and the eighth diode D8 to convert 12V to 3.3V for power supply output to the single-chip microcomputer. After the single-chip microcomputer gets power supply, it starts to work. At the same time, the 12V voltage input by the left brake light LT&STOP of the tractor lighting socket and the right brake light RT&STOP of the tractor lighting socket passes through the fourth resistor R4, the seventh resistor R7, the first resistor R1, the fifth resistor R5, the second resistor R2, the eighth resistor R8, the first capacitor C1, the third capacitor C3, the second diode D2, and the fourth diode D4 for element shunting, voltage division, filtering, and voltage regulation to 3.3V to provide instructions for the IO0 and IO1 interfaces of the single-chip microcomputer. After the IO0 and IO1 ports of the single-chip microcomputer receive a high level, the IO5 port outputs a high level, which is limited by the resistor RN3 and supplied to the base of the third triode Q3. The collector of the third triode Q3 conducts and turns on, pulling down the high level of the INPUT5 pin of the fourth single-chip microcomputer U4. The fourth single-chip microcomputer U4 starts to output, and the brake light STOP voltage of the trailer lighting socket changes from 0V to 12V to drive the trailer brake light to work. At this time, when turning on the left turn signal, the voltage from the left brake light LT&STOP port of the tractor lighting socket to the IO0 pin continuously changes between high and low. The voltage from the right brake light RT&STOP port of the tractor lighting socket to the IO1 pin remains unchanged. When the single-chip microcomputer recognizes that the voltage of IO1 has not changed, the IO5 keeps outputting a high level voltage unchanged, the third triode Q3 continues to conduct, and the fourth single-chip microcomputer U4 continues to work, and the brake light on the trailer remains on. And the IO3 output level changes continuously following IO0, the output voltage of the seventh single-chip microcomputer U7 blinks following the left brake light LT&STOP of the tractor lighting socket, and the left turn signal of the trailer blinks following the left brake light LT&STOP of the tractor lighting socket. When the left turn signal is turned off, the voltage of the left brake light LT&STOP of the tractor lighting socket changes from continuously changing to a high level. When the high level is detected by IO0 for more than 0.7 seconds, the IO3 voltage output is turned off, the first triode Q1 is cut off, and the seventh single-chip microcomputer U7 is turned off, and the left turn signal of the trailer is turned off.

[0063] Turn on the right turn signal after stepping on the brake: When the tractor steps on the brake pedal, the left brake light LT&STOP of the tractor lighting socket and the right brake light RT&STOP of the tractor lighting socket simultaneously receive 12V voltage. Through the first diode D1 and the third diode D3, it supplies power to the seventh single-chip microcomputer U7, the first single-chip microcomputer U1, the second single-chip microcomputer U2, the third single-chip microcomputer U3 MOS tube, and the eighth diode D8 to convert 12V to 3.3V for power supply output to the single-chip microcomputer. After the single-chip microcomputer gets power supply, it starts to work. At the same time, the 12V voltage input by the left brake light LT&STOP of the tractor lighting socket and the right brake light RT&STOP of the tractor lighting socket passes through the fourth resistor R4, the seventh resistor R7, the first resistor R1, the fifth resistor R5, the second resistor R2, the eighth resistor R8, the first capacitor C1, the third capacitor C3, the second diode D2, and the fourth diode D4 components for shunt, voltage division, filtering, and voltage regulation to 3.3V to provide instructions for the IO0 and IO1 interfaces of the single-chip microcomputer. After the IO0 and IO1 ports of the single-chip microcomputer receive a high level, the IO5 port outputs a high level, which is limited by the resistor RN3 and supplied to the base of the third triode Q3. The collector of the third triode Q3 conducts and turns on, pulling down the high level of the INPUT5 pin of the fourth single-chip microcomputer U4. The fourth single-chip microcomputer U4 starts to output, and the brake light STOP voltage of the trailer lighting socket changes from 0V to 12V to drive the trailer brake light to work. At this time, when turning on the right turn signal, the voltage from the right brake light RT&STOP port of the tractor lighting socket to the IO1 pin keeps flashing high and low. The voltage from the left brake light LT&STOP port of the tractor lighting socket to the IO0 pin remains unchanged. When the single-chip microcomputer recognizes that the voltage of IO0 has not changed, IO5 keeps outputting a high-level voltage unchanged, the third triode Q3 continues to conduct, the fourth single-chip microcomputer U4 continues to work, and the brake light on the trailer keeps working. And the output level of IO2 changes continuously following IO1. The output voltage of the first single-chip microcomputer U1 flashes following the right brake light RT&STOP of the tractor lighting socket, and the right turn signal of the trailer flashes following the right brake light RT&STOP of the tractor lighting socket. When the right turn signal is turned off, the voltage of the right brake light RT&STOP of the tractor lighting socket changes from continuously changing to a high level. When IO1 detects that the high level time exceeds 0.7 seconds, the voltage output of IO2 is turned off, the second triode Q2 is cut off, and the first single-chip microcomputer U1 is turned off, and the right turn signal of the trailer is turned off.

[0064] Hazard warning lights: When the tractor turns on the hazard warning lights, the left brake light LT&STOP of the tractor's lighting socket and the right brake light RT&STOP of the tractor's lighting socket simultaneously receive a 12V flashing voltage. Through the first diode D1 and the third diode D3, it supplies power to the seventh single-chip microcomputer U7, the first single-chip microcomputer U1, the second single-chip microcomputer U2, the third single-chip microcomputer U3 MOS transistor, and the eighth diode D8 to convert 12V to 3.3V for power supply output to the single-chip microcomputer. After the single-chip microcomputer gets power supply, it starts to work. At the same time, the 12V voltage input by the left brake light LT&STOP of the tractor's lighting socket and the right brake light RT&STOP of the tractor's lighting socket passes through components such as the fourth resistor R4, the seventh resistor R7, the first resistor R1, the fifth resistor R5, the second resistor R2, the eighth resistor R8, the first capacitor C1, the third capacitor C3, the second diode D2, and the fourth diode D4 for shunting, voltage division, filtering, and voltage regulation to 3.3V to provide instructions for the IO0 and IO1 interfaces of the single-chip microcomputer. After the IO0 and IO1 ports of the single-chip microcomputer receive a high level, the IO5 port outputs a high level, which is limited in current by the resistor RN3 and supplied to the base of the third triode Q3. The collector of the third triode Q3 conducts and turns on, pulling down the high level of the INPUT5 pin of the fourth single-chip microcomputer U4. The fourth single-chip microcomputer U4 starts to output, and the brake light STOP voltage of the trailer's lighting socket changes from 0V to 12V to drive the trailer's brake light to work. When the lighting time of the trailer's brake light is equal to 0.7 seconds and the extinguishing time is also equal to 0.7 seconds, after continuously flashing alternately 3 times, the IO5 of the single-chip microcomputer stops outputting, the third triode Q3 cuts off, and the second single-chip microcomputer U2 turns off. At the same time, IO3 and IO4 start to output, and the seventh single-chip microcomputer U7 and the first single-chip microcomputer U1 start to flash following the left brake light LT&STOP of the tractor's lighting socket and the right brake light RT&STOP of the tractor's lighting socket, and the left and right turn signals of the trailer flash simultaneously. When any one of the left brake light LT&STOP of the tractor's lighting socket and the right brake light RT&STOP of the tractor's lighting socket stops outputting, or the output time of the brake light STOP of the trailer's lighting socket is greater than or less than 0.7 seconds, then IO0 and IO1 stop outputting. The left and right turn signals of the trailer stop outputting.

[0065] Soft turn-on of rear fog lamp: When IO5 outputs a high level, switch the position lamp switch 3 times continuously. The T / M port of the position lamp on the tractor's lighting socket supplies voltage signals to the IO2 pin of the single-chip microcomputer through the tenth resistor R10, the third resistor R3, the eleventh resistor R11, the fifth capacitor C5, and the sixth diode D6 for shunting, voltage division, filtering, and voltage stabilization. The voltage level of the IO2 of the single-chip microcomputer changes 3 times. When it becomes high for the third time, IO6 outputs a high level, the fourth triode Q4 conducts, the fifth single-chip microcomputer U5 is turned on, the FOG port outputs voltage, and the rear fog lamp of the trailer lights up. When the position lamp switch is turned off, the T / M port of the position lamp on the tractor's lighting socket and IO2 become low levels. IO6 outputs a low level, the fourth triode Q4 cuts off, the fifth single-chip microcomputer U5 is turned off, the FOG port is closed, and the rear fog lamp of the trailer is turned off.

[0066] 12V ACC power output: The 12V power supply of the tractor's battery supplies power to the sixth single-chip microcomputer U6 through the AX port. At the same time, it is divided by the thirteenth resistor R13 and the fourteenth resistor R14, and filtered by the seventh capacitor C7. The voltage acquisition pin ADC0 of the single-chip microcomputer acquires the voltage. After the vehicle engine starts, the voltage of the AX port is 14.2V. After being divided by the thirteenth resistor R13 and the fourteenth resistor R14, the voltage of the voltage acquisition pin ADC0 is 1.7V. The level output pin IO7 of the single-chip microcomputer outputs a high level. After being limited by the sixteenth resistor R16, the fifth triode Q5 conducts and pulls down the voltage of pin 2 of the sixth single-chip microcomputer U6. The sixth single-chip microcomputer U6 starts, and the 12V-ACC port outputs voltage to supply power to the trailer. When the vehicle engine is turned off, the voltage of the AX port is 12.8V. After being divided by the thirteenth resistor R13 and the fourteenth resistor R14, the voltage of the ADC0 port is 1.3V. The IO7 pin of the single-chip microcomputer outputs a low level, the fifth triode Q5 cuts off, the sixth single-chip microcomputer U6 is turned off, and there is no voltage at the 12V-ACC port.

[0067] In the embodiment of the present utility model, the input lighting signals are collected by the lighting signal sampling part, and the lighting signal output part is controlled by the single-chip microcomputer to output control lighting signals, so as to realize the conversion between two standard lighting signals, make different standard lighting signals unified and consistent, and greatly increase driving safety.

[0068] Details not described in the embodiments of the present utility model are all well-known technologies to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A lighting signal conversion head, characterized in that, Including: A first resistor, a second resistor, a third resistor, a first single-chip microcomputer, a second single-chip microcomputer, a third single-chip microcomputer, a fourth single-chip microcomputer, a fifth single-chip microcomputer, a first triode, a second triode, a third triode and a fourth triode; a first end of the first resistor is connected to a left brake light signal output end of a tractor lighting socket, and a second end of the first resistor is connected to a first signal input pin of the first single-chip microcomputer; a first signal output pin of the first single-chip microcomputer is connected to a base of the first triode, and an emitter of the first triode is grounded; a collector of the first triode is connected to a signal input pin of the second single-chip microcomputer; a signal output pin of the second single-chip microcomputer is connected to a left turn signal input end of a trailer lighting socket; a first end of the second resistor is connected to a right brake light signal output end of the tractor lighting socket, and a second end of the second resistor is connected to a second signal input pin of the first single-chip microcomputer; a second signal output pin of the first single-chip microcomputer is connected to a base of the second triode, and an emitter of the second triode is grounded; a collector of the second triode is connected to a signal input end of the third single-chip microcomputer; a signal output pin of the third single-chip microcomputer is connected to a right turn signal input end of the trailer lighting socket; a first end of the third resistor is connected to a width indicator light signal output end of the tractor lighting socket, and a second end of the third resistor is connected to a third signal input pin of the first single-chip microcomputer; a third signal output pin of the first single-chip microcomputer is connected to a base of the third triode, and an emitter of the third triode is grounded; a collector of the third triode is connected to a signal input end of the fourth single-chip microcomputer; a signal output pin of the fourth single-chip microcomputer is connected to a brake light signal input end of the trailer lighting socket; a fourth signal input pin of the first single-chip microcomputer is connected to a base of the fourth triode, and an emitter of the fourth triode is grounded; a collector of the fourth triode is connected to a signal input end of the fifth single-chip microcomputer; a signal output pin of the fifth single-chip microcomputer is connected to a rear fog light signal input end of the trailer lighting socket; a current detection input pin of the first single-chip microcomputer is connected to current detection output pins of the second single-chip microcomputer, the third single-chip microcomputer, the fourth single-chip microcomputer and the fifth single-chip microcomputer.

2. The lighting signal conversion head according to claim 1, wherein, Further including: A first diode, a second diode, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor and a second capacitor; the positive electrode of the first diode is connected between the left brake light signal output terminal of the tractor lighting socket and the first end of the first resistor, and the negative electrode of the first diode is connected to the power supply; the first end of the fourth resistor is connected to the positive electrode of the first diode, and the second end of the fourth resistor is grounded; the first ends of the fifth resistor and the first capacitor are both connected to the second end of the first resistor, and the second ends of the fifth resistor and the first capacitor are both grounded; the positive electrode of the second diode is grounded, and the negative electrode of the second diode is connected to the second end of the first resistor; the sixth resistor and the second capacitor are connected in parallel to form a first parallel circuit; the first end of the first parallel circuit is connected to the signal output pin of the second single-chip microcomputer, and the second end of the first parallel circuit is grounded.

3. The lighting signal conversion head according to claim 1, characterized in that, It further includes: A third diode, a fourth diode, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor and a fourth capacitor; the positive electrode of the third diode is connected between the right brake light signal output terminal of the tractor lighting socket and the first end of the second resistor, and the negative electrode of the third diode is connected to the power supply; the first end of the seventh resistor is connected to the positive electrode of the third diode, and the second end of the seventh resistor is grounded; the first ends of the eighth resistor and the third capacitor are both connected to the second end of the second resistor, and the second ends of the eighth resistor and the third capacitor are both grounded; the positive electrode of the fourth diode is grounded, and the negative electrode of the fourth diode is connected to the second end of the second resistor; the ninth resistor and the fourth capacitor are connected in parallel to form a second parallel circuit; the first end of the second parallel circuit is connected to the signal output pin of the third single-chip microcomputer, and the second end of the second parallel circuit is grounded.

4. The lighting signal conversion head according to claim 1, wherein, It further includes: A fifth diode, a sixth diode, a tenth resistor, an eleventh resistor, a twelfth resistor, a fifth capacitor and a sixth capacitor; the positive electrode of the fifth diode is connected between the width indicator light signal output terminal of the tractor lighting socket and the first end of the third resistor, and the negative electrode of the fifth diode is connected to the power supply; the first end of the tenth resistor is connected to the positive electrode of the fifth diode, and the second end of the tenth resistor is grounded; the first ends of the eleventh resistor and the fifth capacitor are both connected to the second end of the third resistor, and the second ends of the eleventh resistor and the fifth capacitor are both grounded; the positive electrode of the sixth diode is grounded, and the negative electrode of the sixth diode is connected to the second end of the third resistor; the twelfth resistor and the sixth capacitor are connected in parallel to form a third parallel circuit; the first end of the third parallel circuit is connected to the signal output pin of the fourth single-chip microcomputer, and the second end of the third parallel circuit is grounded.

5. The lighting signal conversion head according to claim 1, characterized in that It further includes: The thirteenth resistor, the fourteenth resistor, the fifteenth resistor, the sixteenth resistor, the fifth triode, the seventh capacitor, the eighth capacitor and the sixth single-chip microcomputer; the power input terminal of the sixth single-chip microcomputer is connected to the power output port; the first end of the fifteenth resistor is connected to the level output pin of the first single-chip microcomputer, the second end of the fifteenth resistor is connected to the base of the fifth triode, and the emitter of the fifth triode is grounded; the collector of the fifth triode is connected to the signal input terminal of the sixth single-chip microcomputer; the sixteenth resistor and the eighth capacitor are connected in parallel to form a fourth parallel circuit; the first end of the fourth parallel circuit is connected to the power output terminal of the sixth single-chip microcomputer, and the first end of the fourth parallel circuit is grounded; the first end of the thirteenth resistor is connected to the power output port, the second end of the thirteenth resistor is connected to the first ends of the fourteenth resistor and the seventh capacitor, and the second end of the thirteenth resistor is also connected to the voltage acquisition pin of the first single-chip microcomputer; the second ends of the fourteenth resistor and the seventh capacitor are grounded.

6. The lighting signal conversion head according to claim 5, wherein It further includes: A voltage conversion circuit; the power input terminal of the voltage conversion circuit is connected to the power supplies of the second single-chip microcomputer, the third single-chip microcomputer, the fourth single-chip microcomputer and the fifth single-chip microcomputer, and the power output terminal of the voltage conversion circuit is connected to the power input terminal of the first single-chip microcomputer.

7. The lighting signal conversion head according to claim 6, characterized in that, The voltage conversion circuit includes: a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a seventeenth resistor and a seventh single-chip microcomputer; the ninth capacitor, the tenth capacitor and the eleventh capacitor are connected in parallel to form a fifth parallel circuit, and the twelfth capacitor, the thirteenth capacitor and the fourteenth capacitor are connected in parallel to form a sixth parallel circuit; the first end of the fifth parallel circuit is connected to the power supply and the power input terminal of the seventh single-chip microcomputer, and the second end of the fifth parallel circuit is grounded; the first end of the seventeenth resistor is connected to the power supply, and the second end of the seventeenth resistor is connected to the enable terminal of the seventh single-chip microcomputer; the first end of the sixth parallel circuit is connected to the power output terminal of the seventh single-chip microcomputer, and the second end of the sixth parallel circuit is grounded.

8. The lighting signal conversion head according to claim 7, characterized in that, The model of the first single-chip microcomputer is STM8S003F3U6TR of STMicroelectronics, and the models of the second single-chip microcomputer, the third single-chip microcomputer, the fourth single-chip microcomputer, the fifth single-chip microcomputer and the sixth single-chip microcomputer are all BTS6143D of Infineon Technologies, and the model of the seventh single-chip microcomputer is TPS70933DBVR of Texas Instruments.

Images