CN113291231A - Running water lamp control system - Google Patents
Running water lamp control system Download PDFInfo
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- CN113291231A CN113291231A CN202110499438.9A CN202110499438A CN113291231A CN 113291231 A CN113291231 A CN 113291231A CN 202110499438 A CN202110499438 A CN 202110499438A CN 113291231 A CN113291231 A CN 113291231A
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- light
- emitting diode
- chip microcomputer
- single chip
- lamp
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/0088—Details of electrical connections
- B60Q1/0094—Arrangement of electronic circuits separated from the light source, e.g. mounting of housings for starter circuits for discharge lamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
- B60Q11/007—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not the lighting devices indicating change of drive direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention provides a running water lamp control system, which comprises a storage battery power supply, an electric lock ON gear switch, a left steering lamp switch, a right steering lamp switch, a flashing unit and a light-emitting diode group, wherein the storage battery power supply is connected with the electric lock ON gear switch; the flashing unit comprises a single chip microcomputer, a power supply module, a switch acquisition circuit, an NMOS (N-channel metal oxide semiconductor) tube, a light emitting diode control circuit, a left steering lamp fault diagnosis module and a right steering lamp fault diagnosis module. By implementing the invention, the control circuit of the running water lamp can be effectively simplified, and whether each light-emitting diode has a fault can be respectively detected, so that the control problem of the running water lamp is effectively simplified, and the control reliability of the running water lamp is improved.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a running water lamp control system.
Background
With the gradual popularization of automobiles, people have higher and higher requirements on the automobiles from functions or appearances, and steering running lights also gradually start to be assembled from options to standards. The running water lamp brings visual impact to people, is more gorgeous and colorful, and increases the return rate. When the steering running water lamp brings various advantages, the steering running water lamp is more complex than the traditional steering lamp, the cost is higher, and the failure rate is improved to some extent. The current flowing water lamp control circuit is complex and cannot provide effective fault diagnosis function.
Disclosure of Invention
The present invention is directed to a running water lamp control system to solve the above-mentioned technical problems, thereby simplifying a running water lamp control circuit and providing an effective fault diagnosis function.
In order to solve the technical problem, the invention provides a running water lamp control system, which comprises a battery power supply, an electric lock ON stop switch, a left turn light switch, a right turn light switch, a flash unit and a light emitting diode group, wherein the battery power supply is connected with the battery power supply;
the flashing unit comprises a single chip microcomputer, a power supply module, a switch acquisition circuit, an NMOS (N-channel metal oxide semiconductor) tube, a light emitting diode control circuit, a left steering lamp fault diagnosis module and a right steering lamp fault diagnosis module;
the light-emitting diode group comprises a plurality of left light-emitting diodes and a plurality of right light-emitting diodes, the number of the light-emitting diode control circuits is multiple, and the light-emitting diode control circuits and the light-emitting diodes in the light-emitting diode group are in one-to-one correspondence;
the single chip microcomputer is respectively connected with the electric lock ON gear switch, the left steering lamp switch and the right steering lamp switch through the switch acquisition circuit; the potential end of the singlechip is connected with the grid of the NMOS tube; the output end of the storage battery power supply is respectively connected with the input end of the power supply module and the drain electrode of the NMOS tube, the output end of the power supply module is respectively connected with the power supply end of the single chip microcomputer and the first input end of each LED control circuit, and the second input end of each LED control circuit is connected with the source electrode of the NMOS tube; the control ends of the single chip microcomputer are respectively connected with the control ends of the light emitting diode control circuits one by one; the output end of each light-emitting diode control circuit is respectively connected with the anodes of each left light-emitting diode and each right light-emitting diode, and the cathodes of each left light-emitting diode and each right light-emitting diode are grounded together;
the control end of the left steering lamp fault diagnosis module is connected with the first signal end of the single chip microcomputer, and a plurality of detection ends of the left steering lamp fault diagnosis module are respectively connected with the anode of each left light-emitting diode; the control end of the right turn light fault diagnosis module is connected with the second signal end of the single chip microcomputer, and a plurality of detection ends of the right turn light fault diagnosis module are respectively connected with the anode of each right light-emitting diode.
Preferably, the light emitting diode control circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode, a second triode and a third triode;
the first input end of the light-emitting diode control circuit is connected with the base electrode of the first triode through the first resistor, and the first input end of the light-emitting diode control circuit is connected with the collector electrode of the second triode through the second resistor; the emitting electrode of the first triode is connected with the control end of the light-emitting diode control circuit, the collecting electrode of the first triode is connected with the base electrode of the second triode, the emitting electrode of the second triode is respectively connected with the base electrode of the third triode and one end of the third resistor, the emitting electrode of the third triode and the other end of the third resistor are grounded together, and the second input end of the light-emitting diode control circuit is respectively connected with the collecting electrode of the third triode and the output end of the light-emitting diode control circuit through the fourth resistor.
As a preferable scheme, the left turn signal lamp fault diagnosis module is used for detecting a voltage value of each left light emitting diode in a working state and sending the voltage value to the single chip microcomputer, and the right turn signal lamp fault diagnosis module is used for detecting a voltage value of each right light emitting diode in a working state and sending the voltage value to the single chip microcomputer; the single chip microcomputer is used for comparing each acquired voltage value with a preset voltage threshold range so as to carry out fault diagnosis on each light emitting diode.
As a preferred scheme, the single chip microcomputer is specifically configured to determine that the light emitting diode is in an open circuit state when it is determined that the voltage value of the light emitting diode in the working state is greater than a preset maximum voltage threshold; and when the voltage value of the light-emitting diode in the working state is judged to be smaller than the preset voltage minimum threshold value, the light-emitting diode is judged to be in a short-circuit state.
Preferably, the single chip microcomputer is further configured to shorten the flashing interval time of the water lamp on one side when it is diagnosed that one or more light emitting diodes on the one side are in a fault state, so as to control the flashing frequency of the water lamp on the one side to be increased.
Preferably, the single chip microcomputer is further configured to generate a fault code according to the diagnosis result and send the fault code to the display instrument through the CAN bus when the one or more light emitting diodes are diagnosed to be in a fault state.
Preferably, the single chip microcomputer is further configured to cut off a power supply of the faulty light emitting diode through the control terminal when it is diagnosed that one or more light emitting diodes are in a faulty state.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a running water lamp control system, which comprises a storage battery power supply, an electric lock ON gear switch, a left steering lamp switch, a right steering lamp switch, a flashing unit and a light-emitting diode group, wherein the storage battery power supply is connected with the electric lock ON gear switch; the flashing unit comprises a single chip microcomputer, a power supply module, a switch acquisition circuit, an NMOS (N-channel metal oxide semiconductor) tube, a light emitting diode control circuit, a left steering lamp fault diagnosis module and a right steering lamp fault diagnosis module. By implementing the invention, the control circuit of the running water lamp can be effectively simplified, and whether each light-emitting diode has a fault can be respectively detected, so that the control problem of the running water lamp is effectively simplified, and the control reliability of the running water lamp is improved.
Drawings
Fig. 1 is a schematic structural diagram of a flowing water lamp control system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a running light control system, which includes a battery power supply, an electric lock ON stop switch, a left turn light switch, a right turn light switch, a flashing unit, and a light emitting diode set;
the flashing unit comprises a single chip microcomputer, a power supply module, a switch acquisition circuit, an NMOS (N-channel metal oxide semiconductor) tube, a light emitting diode control circuit, a left steering lamp fault diagnosis module and a right steering lamp fault diagnosis module;
the light-emitting diode group comprises a plurality of left light-emitting diodes and a plurality of right light-emitting diodes, the number of the light-emitting diode control circuits is multiple, and the light-emitting diode control circuits and the light-emitting diodes in the light-emitting diode group are in one-to-one correspondence;
the single chip microcomputer is respectively connected with the electric lock ON gear switch, the left steering lamp switch and the right steering lamp switch through the switch acquisition circuit; the potential end of the singlechip is connected with the grid of the NMOS tube; the output end of the storage battery power supply is respectively connected with the input end of the power supply module and the drain electrode of the NMOS tube, the output end of the power supply module is respectively connected with the power supply end of the single chip microcomputer and the first input end of each LED control circuit, and the second input end of each LED control circuit is connected with the source electrode of the NMOS tube; the control ends of the single chip microcomputer are respectively connected with the control ends of the light emitting diode control circuits one by one; the output end of each light-emitting diode control circuit is respectively connected with the anodes of each left light-emitting diode and each right light-emitting diode, and the cathodes of each left light-emitting diode and each right light-emitting diode are grounded together;
the control end of the left steering lamp fault diagnosis module is connected with the first signal end of the single chip microcomputer, and a plurality of detection ends of the left steering lamp fault diagnosis module are respectively connected with the anode of each left light-emitting diode; the control end of the right turn light fault diagnosis module is connected with the second signal end of the single chip microcomputer, and a plurality of detection ends of the right turn light fault diagnosis module are respectively connected with the anode of each right light-emitting diode.
Preferably, the light emitting diode control circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode, a second triode and a third triode;
the first input end of the light-emitting diode control circuit is connected with the base electrode of the first triode through the first resistor, and the first input end of the light-emitting diode control circuit is connected with the collector electrode of the second triode through the second resistor; the emitting electrode of the first triode is connected with the control end of the light-emitting diode control circuit, the collecting electrode of the first triode is connected with the base electrode of the second triode, the emitting electrode of the second triode is respectively connected with the base electrode of the third triode and one end of the third resistor, the emitting electrode of the third triode and the other end of the third resistor are grounded together, and the second input end of the light-emitting diode control circuit is respectively connected with the collecting electrode of the third triode and the output end of the light-emitting diode control circuit through the fourth resistor.
As a preferable scheme, the left turn signal lamp fault diagnosis module is used for detecting a voltage value of each left light emitting diode in a working state and sending the voltage value to the single chip microcomputer, and the right turn signal lamp fault diagnosis module is used for detecting a voltage value of each right light emitting diode in a working state and sending the voltage value to the single chip microcomputer; the single chip microcomputer is used for comparing each acquired voltage value with a preset voltage threshold range so as to carry out fault diagnosis on each light emitting diode.
As a preferred scheme, the single chip microcomputer is specifically configured to determine that the light emitting diode is in an open circuit state when it is determined that the voltage value of the light emitting diode in the working state is greater than a preset maximum voltage threshold; and when the voltage value of the light-emitting diode in the working state is judged to be smaller than the preset voltage minimum threshold value, the light-emitting diode is judged to be in a short-circuit state.
Preferably, the single chip microcomputer is further configured to shorten the flashing interval time of the water lamp on one side when it is diagnosed that one or more light emitting diodes on the one side are in a fault state, so as to control the flashing frequency of the water lamp on the one side to be increased.
Preferably, the single chip microcomputer is further configured to generate a fault code according to the diagnosis result and send the fault code to the display instrument through the CAN bus when the one or more light emitting diodes are diagnosed to be in a fault state.
Preferably, the single chip microcomputer is further configured to cut off a power supply of the faulty light emitting diode through the control terminal when it is diagnosed that one or more light emitting diodes are in a faulty state.
Referring to fig. 1, based on the above scheme, in order to better understand the flowing water lamp control system provided by the embodiment of the present invention, the following detailed description is provided:
the running water lamp control system provided by the embodiment of the invention comprises a storage battery power supply, an electric lock ON stop switch, a left steering lamp switch, a right steering lamp switch, a flashing unit (comprising a power supply module, a switch acquisition circuit, a single chip microcomputer, a light-emitting diode control circuit, a left steering lamp fault diagnosis module, a right steering lamp fault diagnosis module and the like), a light-emitting diode and the like.
The battery power supply provides power for the flash unit and the like; the electric lock ON gear switch provides an ON gear switch signal for the flash unit; the left turn light switch provides a left turn light switch signal for the flashing unit; the right turn light switch provides a right turn light switch signal for the flashing unit; the flashing unit receives the ON gear switch signal, the turn signal and the power supply provided by the battery jar, and controls the light-emitting diode according to the set control logic.
The flash unit comprises a power module, a switch acquisition circuit, a single chip microcomputer, a light emitting diode control circuit, a left steering lamp fault detection module, a right steering lamp fault detection module and the like, wherein the power module provides power for the single chip microcomputer and the light emitting diode control circuit; the switch acquisition circuit acquires an electric lock ON gear switch signal, a left steering lamp switch signal, a right steering lamp switch signal and the like; the light-emitting diode control circuit receives a negative pulse signal of the single chip microcomputer to control the ON and off of the light-emitting diode, and the single chip microcomputer controls the light-emitting diode through the light-emitting diode control circuit by acquiring an electric lock ON gear switch signal, a left and right steering lamp switch signal and the like; the left and right steering lamp fault detection module is used for detecting whether the light emitting diode has a fault or not;
the system has the following working principle and functions:
1. left and right steering indicating light non-working state
When the storage battery power supply supplies power to the single chip microcomputer through the power supply module, and the single chip microcomputer collects that the left and right turn signal lamp switching signals are invalid, the single chip microcomputer pulls down the grid potential of the NMOS tube T4, and at the moment, the power supply of all the light-reflecting diodes is disconnected, namely all the light-emitting diodes are in a non-working state;
2. danger alarm function
When the battery power supplies power to the single chip microcomputer through the power module, the single chip microcomputer collects the switch signals of the left turn light and the right turn light to be effective (it needs to be explained that the danger alarm function allows the electric lock to be opened under the condition that the electric lock is not electrified, for example, the vehicle is flamed out and the vehicle is not electrified, the danger alarm function can be started to remind surrounding vehicles to pay attention), the single chip microcomputer pulls the grid potential of the NMOS tube T4 high (the NMOS tube T4 is in a conducting state, and the power supply circuit of the light emitting diode is conducted), meanwhile, the levels of the ports P11 and P21 are pulled low, the levels of the P12, the P13, … …, the P1n, the P22, the … … and the P2n are still kept high, at the time, the triodes T2 and T3 are in a blocking state, the left light emitting diode 1 is high, the left light emitting diode 1 is in a conducting state (the light emitting diode is lighted), and the right light emitting diode 1 is lighted, other light emitting diodes are in an off state;
after the interval time t1, the single chip microcomputer keeps the level of the ports P11 and P21 at a low level, and pulls down the potentials of P12 and P22, so that the left light-emitting diode 2 and the right light-emitting diode 2 are also lightened; at an interval t1, the single chip microcomputer keeps the ports P11, P12, P21 and P22 at low level, and pulls down the potentials of the ports P13 and P23, so that the left LED 3 and the right LED 3 are also lighted; according to the interval time t1, the left side LED n and the right side LED n are lighted; at an interval t1, the single chip microcomputer pulls the potentials of the ports P11, P12, P13, … …, P1n, P21, P22, P23, … … and P2n high, and all the LEDs on the left side and the right side are turned off. At the interval of time t2, the single chip controls the left and right light emitting diodes by the same control logic, the left and right light emitting diodes are sequentially lightened in the sequence of running water at the same time in the same rhythm, and then are simultaneously extinguished and circulate until the turn light switch is failed;
3. left turn light function
When the storage battery power supply supplies power to the single chip microcomputer through the power supply module, the single chip microcomputer collects that an electric lock ON gear switch signal and a left turn light switch signal are both effective and a right turn light switch signal is not effective, the single chip microcomputer pulls up the grid potential of an NMOS tube T4 (the NMOS tube T4 is in a conduction state, a power supply circuit of the light emitting diode is conducted), pulls down the potential of a port P11, other ports still keep high level, only the left light emitting diode 1 is lightened at the moment, after the interval time T1, the single chip microcomputer keeps the potential of the port P11 as low potential, pulls down the potential of the port P12, the potentials of other ports keep unchanged, and the left light emitting diode 1 and the left light emitting diode 2 are in a lightening state at the moment; according to the interval time and the logic, until the left LED n is lightened; then at interval t1, the single chip microcomputer pulls the potentials of the ports P11, P12, P13, … … and P1n high, and all the light emitting diodes on the left side are in an off state; and at the interval of time t2, the single chip controls the left light-emitting diode according to the same control logic, the left light-emitting diode is sequentially lightened in the sequence of running water, and then is simultaneously extinguished and circulates until the left steering switch fails.
4. Right turn light function
When the storage battery power supply supplies power to the single chip microcomputer through the power supply module, the single chip microcomputer collects that an electric lock ON gear switch signal and a right turn light switch signal are both effective and a left turn light switch signal is not effective, the single chip microcomputer pulls up the grid potential of an NMOS tube T4 (the NMOS tube T4 is in a conducting state, a light-emitting diode power supply circuit is conducted), pulls down the potential of a port P21, other ports still keep high level, only a right light-emitting diode 1 is lightened at the moment, after the interval time T1, the single chip microcomputer keeps the potential of the port P21 as low potential, pulls down the potential of a port P22, the potentials of other ports keep unchanged, and the right light-emitting diode 1 and the right light-emitting diode 2 are in a lightening state at the moment; according to the interval time and the logic, until the right LED n is lightened; then at interval t1, the single chip microcomputer pulls the potentials of the ports P21, P22, P23, … … and P2n high, and all the light emitting diodes on the right side are in an off state; and at the interval of time t2, the single chip controls the right light-emitting diode by the same control logic, the right light-emitting diode is sequentially lightened in the sequence of running water, and then is simultaneously extinguished and circulates until the right steering switch fails.
5. Fault diagnosis and alarm function
When the light-emitting diodes are in a working state, the steering lamp fault diagnosis module detects the positive electrode potential of each light-emitting diode and sends the voltage value to the single chip microcomputer, the single chip microcomputer compares the voltage value with a set voltage value, and for example, if the detected voltage value is greater than 5 times of the set voltage value, the light-emitting diode is considered to be in an open circuit state; if the detected voltage value is less than 0.3 times of the set voltage value, the light-emitting diode is considered to be in a short-circuit state; when one or more LEDs on one side are in open circuit or short circuit, the flashing unit controls the flashing frequency of the workflow water turn lamp on the side to be accelerated by 1 time, and fault codes corresponding to the faults are sent to the instrument through the CAN bus. The driver can judge whether the water lamp has a fault or not through the flicker frequency of the water lamp seen by the instrument panel (the water lamp refers to a steering lamp arranged outside the automobile, the driver can judge whether the water lamp has the fault or not through the flicker frequency change of the steering indicator lamp in the instrument, the flicker frequency of the steering indicator lamp in the instrument is the same as that of the water lamp outside the automobile), and if the water lamp has the fault, the specific fault can be checked through the fault code displayed by the instrument.
When one or more LEDs are detected to be short-circuited or open-circuited, the singlechip pulls up the potential of the singlechip control port corresponding to the LED, the output of the LED is closed, and the rest LEDs work according to set logic.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
1. the embodiment of the invention provides a low-cost running water lamp control system by combining a control circuit built by a singlechip and a triode;
2. in view of the fact that the working current of the light-emitting diode is small and the working current of the light-emitting diode is difficult to detect, the embodiment of the invention judges whether the light-emitting diode is in a fault state or not by detecting the positive electrode potential value of the light-emitting diode according to the characteristics of the light-emitting diode;
3. the embodiment of the invention can detect whether each LED has a fault, and if one or more LEDs are detected to be in a fault state, the flash frequency of the water lamp is accelerated and a fault code is sent to the instrument to prompt a user;
4. according to the LED control circuit built by the embodiment of the invention, even if an external diode is short-circuited, a battery power supply is limited by the resistor R4, the working current of a diode loop is small, and a large amount of heat caused by overcurrent can not cause fire and the like.
5. When the left and right light-emitting diodes are in a non-working state, the power supply loop of the light-emitting diode is disconnected by the NMOS tube T4, so that the current in the loop is almost reduced to zero, and the quiescent current of the flash unit is greatly reduced.
6. The embodiment of the invention carries out independent control and fault diagnosis on each light-emitting diode, and if one or more of the light-emitting diodes have faults, the light-emitting diodes can be independently turned off, so that the normal work of other light-emitting diodes is not influenced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. A running water lamp control system is characterized by comprising a storage battery power supply, an electric lock ON gear switch, a left steering lamp switch, a right steering lamp switch, a flashing unit and a light emitting diode group;
the flashing unit comprises a single chip microcomputer, a power supply module, a switch acquisition circuit, an NMOS (N-channel metal oxide semiconductor) tube, a light emitting diode control circuit, a left steering lamp fault diagnosis module and a right steering lamp fault diagnosis module;
the light-emitting diode group comprises a plurality of left light-emitting diodes and a plurality of right light-emitting diodes, the number of the light-emitting diode control circuits is multiple, and the light-emitting diode control circuits and the light-emitting diodes in the light-emitting diode group are in one-to-one correspondence;
the single chip microcomputer is respectively connected with the electric lock ON gear switch, the left steering lamp switch and the right steering lamp switch through the switch acquisition circuit; the potential end of the singlechip is connected with the grid of the NMOS tube; the output end of the storage battery power supply is respectively connected with the input end of the power supply module and the drain electrode of the NMOS tube, the output end of the power supply module is respectively connected with the power supply end of the single chip microcomputer and the first input end of each LED control circuit, and the second input end of each LED control circuit is connected with the source electrode of the NMOS tube; the control ends of the single chip microcomputer are respectively connected with the control ends of the light emitting diode control circuits one by one; the output end of each light-emitting diode control circuit is respectively connected with the anodes of each left light-emitting diode and each right light-emitting diode, and the cathodes of each left light-emitting diode and each right light-emitting diode are grounded together;
the control end of the left steering lamp fault diagnosis module is connected with the first signal end of the single chip microcomputer, and a plurality of detection ends of the left steering lamp fault diagnosis module are respectively connected with the anode of each left light-emitting diode; the control end of the right turn light fault diagnosis module is connected with the second signal end of the single chip microcomputer, and a plurality of detection ends of the right turn light fault diagnosis module are respectively connected with the anode of each right light-emitting diode.
2. The water lamp control system according to claim 1, wherein the light emitting diode control circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, a second transistor, and a third transistor;
the first input end of the light-emitting diode control circuit is connected with the base electrode of the first triode through the first resistor, and the first input end of the light-emitting diode control circuit is connected with the collector electrode of the second triode through the second resistor; the emitting electrode of the first triode is connected with the control end of the light-emitting diode control circuit, the collecting electrode of the first triode is connected with the base electrode of the second triode, the emitting electrode of the second triode is respectively connected with the base electrode of the third triode and one end of the third resistor, the emitting electrode of the third triode and the other end of the third resistor are grounded together, and the second input end of the light-emitting diode control circuit is respectively connected with the collecting electrode of the third triode and the output end of the light-emitting diode control circuit through the fourth resistor.
3. The water-flowing lamp control system according to claim 1, wherein the left turn signal lamp fault diagnosis module is configured to detect a voltage value of each left light-emitting diode in an operating state and send the voltage value to the single-chip microcomputer, and the right turn signal lamp fault diagnosis module is configured to detect a voltage value of each right light-emitting diode in an operating state and send the voltage value to the single-chip microcomputer; the single chip microcomputer is used for comparing each acquired voltage value with a preset voltage threshold range so as to carry out fault diagnosis on each light emitting diode.
4. The water-flowing lamp control system according to claim 3, wherein the single chip microcomputer is specifically configured to determine that the light emitting diode is in an open circuit state when it is determined that the voltage value of the light emitting diode in the operating state is greater than a preset voltage maximum threshold; and when the voltage value of the light-emitting diode in the working state is judged to be smaller than the preset voltage minimum threshold value, the light-emitting diode is judged to be in a short-circuit state.
5. The water lamp control system according to claim 4, wherein the single chip microcomputer is further configured to shorten a flashing interval time of the water lamp on one side when it is diagnosed that one or more light emitting diodes on the one side are in a fault state, so as to control a flashing frequency of the water lamp on the one side to be increased.
6. The water lamp control system according to claim 5, wherein the single chip microcomputer is further configured to generate a fault code according to the diagnosis result and send the fault code to the display instrument through the CAN bus when the one or more light emitting diodes are diagnosed as being in a fault state.
7. The water-flowing lamp control system according to claim 6, wherein the single chip microcomputer is further configured to cut off power to one or more faulty light-emitting diodes through the control terminal when the fault condition is diagnosed.
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| CN202110499438.9A CN113291231B (en) | 2021-05-08 | 2021-05-08 | Running water lamp control system |
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| CN202110499438.9A CN113291231B (en) | 2021-05-08 | 2021-05-08 | Running water lamp control system |
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Citations (22)
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