CN217124728U - Vehicle intelligent driving and diagnosing system with gateway function - Google Patents
Vehicle intelligent driving and diagnosing system with gateway function Download PDFInfo
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- CN217124728U CN217124728U CN202220619648.7U CN202220619648U CN217124728U CN 217124728 U CN217124728 U CN 217124728U CN 202220619648 U CN202220619648 U CN 202220619648U CN 217124728 U CN217124728 U CN 217124728U
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Abstract
The utility model provides a vehicle intelligence drive and diagnostic system with gateway function, the system includes: the system comprises an MCU system module, a CAN communication module, a system power supply module, a power supply diagnosis module, a switching value acquisition module, a power driving and diagnosis module and a wake-up circuit module. After the system collects the switching signals, the control commands are sent to the controller through the CAN bus, corresponding control logics are executed, the power driving and diagnosing module reads related fault information through a special diagnosing tool, the related information is fed back to the MCU system module, the switching signal collection and logic operation are completed, the power load driving output and diagnosis are completed, necessary information is sent to other control units, and CAN information from other control units on the vehicle bus is received and processed for the system to use. The system improves the fault detection efficiency and is convenient for the maintenance of the intelligent vehicle driving and diagnosing system.
Description
Technical Field
The utility model belongs to the technical field of heavy-duty car, concretely relates to vehicle intelligence drive and diagnostic system with gateway function.
Background
With the complexity of the electric system of the whole vehicle, a distributed electric network architecture of the CAN communication is used to transmit data and information in a shared manner, so as to realize networked digital communication and control functions, and the development trend of the electronic and electric of the vehicle is already reached. At present, medium and heavy trucks at home and abroad are developing towards electrical appliances and intellectualization, and more electric control units are arranged on the vehicles. As the number of controllers increases, data communication between electronic devices becomes frequent, and these separate modules used in large numbers cause problems such as increase in cost, increase in failure rate, and complexity in wiring. Therefore, it is necessary to design an integrated and simple and stable vehicle intelligent driving and diagnosis system.
In the prior art, a fault diagnosis method based on a CAN communication bus system (patent No. CN201610516482.5) discloses S0, the vehicle starts; s1, the vehicle controller circularly receives each part message; s2, the vehicle controller judges whether the message of each component is received, if so, the step S1 is carried out; otherwise, go to step S3; s3, the vehicle control unit judges whether the message of the part which does not receive the message in the step S2 is received in the preset time, if so, the vehicle control unit goes to the step S1; otherwise, go to step S4; s4, the vehicle control unit judges whether the part which does not receive the message in the step S3 is the main part, if yes, the step S5 is carried out, otherwise, the step S6 is carried out; s5, the vehicle controller actively cuts off the driving part of the vehicle to ensure the normal work of the braking, steering, light and signal parts, and goes to step S6; and S6, the vehicle control unit judges the fault code corresponding to the part which does not receive the message in the step S3 and sends the fault code to the instrument, and the instrument displays the corresponding fault information.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art, the utility model provides a vehicle intelligence drive and diagnostic system with gateway function gathers and sends control command for corresponding controller through the CAN bus after the switch is closed, carries out control logic, realizes the drive and the failure diagnosis to automobile parts.
The utility model provides a vehicle intelligence drive and diagnostic system with gateway function, include:
MCU system module: the MCU system module is connected with a vehicle CAN bus through a CAN communication module and is used for receiving and processing CAN information from a vehicle bus control unit;
a CAN communication module: the system is used for connecting the MCU system module and the automobile CAN bus and supporting the information transmission between the MCU system module and the automobile bus control unit;
a system power supply module: the power supply conversion device is used for converting a 24V power supply of a vehicle into a 5V power supply required by a main controller and a CAN communication module of a control system;
a power supply diagnosis module: the system is used for diagnosing the voltage condition of the power supply of the whole vehicle in real time and sending the voltage condition to an instrument through a CAN bus;
switching value acquisition module: the system is used for acquiring the on-off states of the vehicle lamp and the windscreen wiper and sending the on-off states to the MCU system module for logical operation;
a power drive and diagnostic module: the fault diagnosis system is connected with a load and used for driving the load and diagnosing faults, wherein the fault diagnosis comprises an open circuit and a short circuit;
the wake-up circuit module: the power supply input device is used for providing an input power supply for the low-control switch acquisition module and disconnecting the power supply input of the low-control switch acquisition module when the single chip microcomputer is in a dormant state.
According to the utility model provides a vehicle intelligence drive and diagnostic system, MCU system module connected mode is:
a TXCAN0 pin of the MCU system module is connected with a TXD pin of the CAN communication module through a resistor R5; the RXDA 0 pin of the MCU system module is connected with the RXD pin of the CAN communication module through a resistor R6; a PTC9 pin of the MCU system module is connected with an STB pin of the CAN communication module through a resistor R8;
a Reset pin of the MCU system module is connected with a PWRGD pin of the system power supply module through a resistor R13;
the AD pin of the MCU system module is connected with the output end of the power supply diagnosis module;
an ADC01 pin of the MCU system module is connected with one end of a switch acquisition module resistor R2 and one end of a switch acquisition module resistor R3;
an ADC1_03 pin of the MCU system module is connected with a CS1 pin of the power driving and diagnosing module through a resistor R25; a PTE0 pin of the MCU system module is connected with a CS1 pin of the power driving and diagnosing module through a resistor R28, a base electrode of a triode Q3, a collector and a resistor R27; an IO driving pin PTE4 of the MCU system module is connected with a power driving and diagnosing module resistor R31; an IO driving pin PTA9 of the MCU system module is connected with a power driving and diagnosing module resistor R20;
and a PTC1 pin of the MCU system module is connected with the base electrode of the wake-up circuit triode Q5 through a resistor R35.
According to the utility model provides a vehicle intelligence drive and diagnostic system, the connected mode of CAN communication module and car CAN bus is:
the CANH pin of the CAN communication module is connected with the CANH of a CAN bus of the whole vehicle;
and a CANL pin of the CAN communication module is connected with a CANL of a CAN bus of the whole vehicle.
According to the utility model provides a vehicle intelligence drive and diagnostic system, inductance L1 of system power module passes through electric capacity C10-C15 and is connected with the VCC pin of CAN communication module, MCU system module;
the VIN pin of the system power supply module is respectively connected with a complete vehicle power supply KL 30-A, KL 30-B through D3 and D4;
and filtering the whole vehicle POWER supply KL 30-A, KL 30-B to obtain a POWER POWER supply.
According to the utility model provides a vehicle intelligence drive and diagnostic system, the power diagnosis module includes the state diagnosis to KL30_ A, KL30_ B, key switch, and the input of power diagnosis module with wait to detect the power and be connected, the output is connected with the AD pin of MCU chip.
According to the utility model provides a vehicle intelligence drive and diagnostic system, switching value collection module includes high accuse switch collection module and low accuse switch collection module;
the high-control switch acquisition module is connected with switches of a left steering lamp, a right steering lamp, an emergency alarm, a position lamp, a front fog lamp, a rear fog lamp, a low-speed windscreen wiper, an intermittent windscreen wiper, a starting signal, a high-speed windscreen wiper and a spraying windscreen wiper on the whole vehicle through plug connectors;
the low-control switch acquisition module is connected with a wiper return signal switch on the whole vehicle through a plug connector;
the input end of the switch acquisition module is connected with the whole vehicle switch, and the output end of the switch acquisition module is connected with the AD port of the MCU system module.
According to the utility model provides a vehicle intelligence drive and diagnostic system, power drive and diagnostic module with the load is connected;
the pin IN1 of the power driving and diagnosing module is connected with a resistor R31;
the pin OUT1 of the output of the power driving and diagnosis module is connected with a capacitor C19, a TVS tube D8, the cathode of a diode D7 and a driving load;
a POWER pin of the POWER driving module is connected with a whole vehicle POWER supply KL30_ B;
and the output of the power driving module adopts TVS protection.
According to the utility model provides a vehicle intelligence drive and diagnostic system, awaken circuit module's connected mode and do: the anode of the voltage stabilizing tube D9 is connected with the POWER end of the system POWER supply module; the collector of the triode Q4 is connected with a low-control switch module KL30Swt pin; the base of the triode Q5 is connected with the MCU system module pin PTC1 through a resistor R35.
According to the utility model provides a vehicle intelligence drive and diagnostic system, the wake-up circuit module is under MCU system module wake-up state, MCU system module IO drive pin output high level, provides input power for low accuse switch collection module; when the MCU system module is in a dormant state, the IO driving pin of the MCU system module outputs a low level, the power supply input of the low control switch acquisition module is disconnected, and the quiescent current is reduced.
According to the utility model provides a vehicle intelligence drive and diagnostic system, vehicle intelligence drive and diagnostic system are under no load, turn-off condition, and its quiescent current of itself can fall to 1.5 uA.
The beneficial effects of the utility model are that:
the control system collects that the switch is closed and then sends a control command to the corresponding controller through the CAN bus to execute the control logic. The fault information connected to the system can be stored, the relevant fault information can be read through a special diagnosis tool, the fault can be quickly detected even if the fault occurs, and the fault clearing efficiency is improved. The system can acquire switching signals in real time, complete load driving, and complete lamp type judgment, cold open circuit and detection of open circuit and short circuit faults in the driving process. And the CAN communication is adopted, so that the using quantity of wire harnesses is reduced, and the maintenance of an intelligent vehicle driving and diagnosing system is facilitated. This controller system, when not going up the key electricity, CAN realize that main control chip, CAN communication chip are in the dormancy state, reduce control system quiescent current, effectively avoid whole car battery power consumption great problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of the overall mechanism of an embodiment of the intelligent driving and diagnosing system for a vehicle with gateway function according to the present invention;
fig. 2 is a schematic diagram of the MCU system module structure of an embodiment of the present invention based on an intelligent driving and diagnosing system for a vehicle with gateway function;
fig. 3 is a schematic structural diagram of a CAN communication module according to an embodiment of the present invention based on an intelligent vehicle driving and diagnosing system with gateway function;
fig. 4 is a schematic structural diagram of a system power module according to an embodiment of the present invention based on an intelligent vehicle driving and diagnosing system with gateway function;
fig. 5 is a schematic structural diagram of a power supply diagnostic module according to an embodiment of the present invention based on an intelligent driving and diagnostic system for a vehicle with gateway function;
fig. 6 is a schematic structural diagram of a high-voltage switch acquisition module with a freewheeling diode according to an embodiment of the present invention based on an intelligent vehicle driving and diagnosing system with a gateway function;
fig. 7 is a schematic structural diagram of an embodiment of a wiper return low-control switch acquisition module based on an intelligent vehicle driving and diagnosing system with gateway function of the present invention;
fig. 8 is a schematic structural diagram of a power driving and diagnosing module according to an embodiment of the present invention based on an intelligent driving and diagnosing system for vehicles with gateway function;
fig. 9 is a schematic diagram of an embodiment wake-up circuit module structure based on a vehicle intelligent driving and diagnosis system with gateway function.
Detailed Description
The invention will be further explained with reference to the following embodiments and drawings: in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily limit the invention.
The utility model provides a vehicle intelligence drive and diagnostic system with gateway function, for the intelligent drive and diagnostic system in heavy-duty car field, will accomplish mainly to be responsible for switching signal collection and logical operation, power load drive output and diagnosis, send necessary information and provide other the control unit, receive, handle the CAN information that comes from other the control unit on the vehicle bus and supply this system to use.
As shown in FIG. 1, the embodiment of the utility model provides a vehicle intelligence drive and diagnostic system with gateway function, including MCU system module, switching value collection module, awakening circuit module, power drive and fault detection module, system power module, CAN communication module and power diagnosis module.
The MCU system module is connected with the CAN communication module, the switching value acquisition module, the system power supply module, the power supply diagnosis module, the power driving and diagnosis module and the wake-up circuit module; the MCU system module is connected with the automobile CAN bus through the CAN communication module, receives and processes CAN information from other control units on the automobile bus, sends necessary information and provides the necessary information for other control units to use; the switching value acquisition module acquires the switching states of all lamps, wipers and starting signals and performs related logic operation; the system power supply module converts a vehicle power supply into a 5V power supply required by a main controller and a CAN communication module of a control system; the power supply diagnosis module diagnoses the power supply voltage condition of the whole vehicle in real time; the output end of the power driving and diagnosing module is connected with the load, and open-circuit and short-circuit fault diagnosis and feedback are realized.
In an embodiment of the present invention, as shown in fig. 2, the MCU system module adopts the single chip microcomputer S32K144 of engzhipu and its peripheral circuit, and its pin connection mode is:
a TXCAN0 pin of the MCU system module is connected with a TXD pin of the CAN communication module through a resistor R5; the RXDA 0 pin of the MCU system module is connected with the RXD pin of the CAN communication module through a resistor R6; a PTC9 pin of the MCU system module is connected with an STB pin of the CAN communication module through a resistor R8;
a Reset pin of the MCU system module is connected with a POWER pin of the system POWER supply module through a resistor R13;
the AD pin of the MCU system module is connected with the output end of the power supply diagnosis module;
an ADC01 pin of the MCU system module is connected with one end of a switch acquisition module resistor R2 and one end of a switch acquisition module resistor R3;
an ADC1_03 pin of the MCU system module is connected with a CS1 pin of the power driving and diagnosing module through a resistor R25; a PTE0 pin of the MCU system module is connected with a CS1 pin of the power driving and diagnosing module through a resistor R28, a base electrode of a triode Q3, a collector and a resistor R27; an IN1 pin of the MCU system module is connected with a resistor R31; an IO driving pin PTE4 of the MCU system module is connected with a power driving and diagnosing module resistor R31; an output OUT1 pin of the MCU system module is connected with a power driving and diagnosing module capacitor C19, a TVS tube D8, a cathode of a diode D7 and a driving load; an IO driving pin PTA9 of the MCU system module is connected with a power driving and diagnosing module resistor R20;
and a PTC1 pin of the MCU system module is connected with the base electrode of the wake-up circuit triode Q5 through a resistor R35.
CAN communication module in the utility model discloses in CAN communication module adopts CAN communication chip TJA1042 and peripheral circuit for receive, handle the CAN information that comes from other the control unit on the vehicle bus, send necessary information, provide other the control unit and use.
As shown in fig. 3, the circuit configuration is: the TXD pin of the CAN transceiver chip TJA1042 is connected with the TXDAN 0 pin of the singlechip S32K144 through a resistor R5, the power supply pin VCC of the chip TJA1042 is respectively connected with one end of a capacitor C2 and one end of a resistor R7, the other end of the capacitor C2 is connected with the ground, the other end of the resistor R7 is connected with one end of a resistor R6 and the RXD pin of the chip TJA1042, the other end of the resistor R6 is connected with the RXDA 0 pin of the singlechip S32K144 chip, the STB pin of the chip TJA1042 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with the PTC9 pin of the singlechip S32K144 chip, the CANH pin of the chip TJA1042 is connected with one end of the capacitor C3 and the 2 pin of the ESD protection chip D2, CANH of the whole vehicle CAN bus is connected, the other end of the capacitor C3 is grounded, a CANL pin of the chip TJA1042 is connected with one end of the capacitor C4, a pin 1 of the ESD protection chip D2 and a CANL of the whole vehicle CAN bus, the other end of the capacitor C4 is connected with the ground, a pin 1 of the ESD protection chip D2 is grounded, and a GND pin of the CAN communication module is grounded.
The system power supply module converts a 24V power supply of a vehicle into a 5V power supply required by a main controller and a CAN communication module of the intelligent vehicle driving and diagnosing system, and under the conditions of no load and turn-off, the quiescent current of the system power supply module CAN be reduced to 1.5uA, so that the requirement of the whole vehicle on the quiescent current is met; and filtering the whole vehicle POWER supply KL 30-A, KL 30-B to obtain a POWER POWER supply. The power circuit comprises functions of reverse connection prevention protection, TVS protection, filtering, voltage stabilization and the like. In an embodiment of the present invention, the power module employs a power chip TPS 57160.
As shown in fig. 4, the circuit configuration is: the VIN pin of the TPS57160 power chip is connected with the negative electrodes of capacitors C5, C6, C7, a rectifier diode D3, a rectifier diode D4, a transient suppression diode D5 and a resistor R9, the positive electrodes of the rectifier diode D3 and the rectifier diode D4 are respectively connected with a whole vehicle power KL30_ A and a whole vehicle power KL30_ B, and the other ends of the transient suppression diode D5, the capacitors C5, C6 and C7 are grounded; the other end of the resistor R9 is connected with EN pins of the resistor R10 and the TPS57160 power supply chip; the other end of the resistor R10 is grounded; the SS/TR pin of the TPS57160 power chip is connected with the ground through a capacitor C8; the RT/CLK pin of the TPS57160 power supply chip is connected with the ground through a resistor R11; a BOOT pin of the TPS57160 power chip is connected with a PH pin of the power chip, a cathode of a diode D6 and one end of an inductor L1 through a resistor R12 and a capacitor C9; the other end of the inductor L1 is connected with a capacitor C10-C15, namely a VCC output pin; the other ends of the capacitors C10-C15, the anode of the diode D6 and a GND pin of the power chip are connected with the ground; a COMP pin of the TPS57160 power supply chip is connected with one end of a resistor R14 and one end of a capacitor C16; the other end of the capacitor C16 is grounded; the other end of the resistor R14 is grounded through a capacitor C17; the VSNS pin of the TPS57160 power chip is connected with the resistors R15 and R16; the other end of the resistor R15 is connected with a VCC pin; the other end of the resistor R16 is grounded; the PWRGD pin of the TPS57160 power supply chip is connected with the Reset pin of the singlechip through a resistor R13; the VCC is 5V power output, and provides required power for MCU chip and CAN communication chip TJA1042 of the control system.
The power supply diagnosis module, the power supply diagnosis module includes the state diagnosis to KL30_ A, KL30_ B, key electricity, the input is connected with the power that awaits measuring, the output is connected with the AD pin of singlechip S32K144 chip, the outside whole car power state of real-time detection, if whole car power supply is higher than 32V, or be less than 18V and detect that whole car power supply breaks down promptly, this control system gathers whole car power supply information to send for the instrument through the CAN bus, show the real-time display power state by the instrument.
As shown in fig. 5, taking KL30_ a power supply diagnosis module as an example, the circuit configuration is as follows: the input end is connected with a vehicle power supply KL30_ A and is connected with a capacitor C18, a resistor R18 and a resistor R17, and the other ends of the capacitor C18 and the resistor R18 are grounded; the other end of the resistor R17 is connected with a resistor R19 and an AD pin ADC02 of the single chip microcomputer S2K144 chip; the other end of the resistor R19 is grounded; the input end resistor R18 and the capacitor C18 form an RC filter circuit, and the output end adopts a resistor voltage division type to send the acquired power state to the single chip microcomputer. All elements of the KL30_ B power supply diagnosis module and the key electric diagnosis module in the system are composed and structurally refer to the wiper high-speed switch acquisition module.
The switch acquisition module comprises a high-control switch acquisition module and a low-control switch acquisition module; the high-control switch acquisition module comprises 11 paths of switch acquisition and standby switching, wherein the 11 paths of switch acquisition comprise a left steering lamp, a right steering lamp, an emergency alarm, a position lamp, a front fog lamp, a rear fog lamp, a low-speed windscreen wiper, a windscreen wiper intermittence, a starting signal, a high-speed windscreen wiper and windscreen wiper spraying; the low-control switch acquisition module comprises 7 paths of switch acquisition and standby of wiper return signals. The high-control switch acquisition module is connected with switches of a left steering lamp, a right steering lamp, an emergency alarm, a position lamp, a front fog lamp, a rear fog lamp, a low-speed windscreen wiper, an intermittent windscreen wiper, a starting signal, a high-speed windscreen wiper and a spraying windscreen wiper on the whole vehicle through plug connectors; the low-control switch acquisition module is connected with a wiper return signal switch on the whole vehicle through a plug connector;
preferably, the input end of the switch acquisition module is provided with a freewheeling diode switch acquisition module and a switch acquisition module without a freewheeling diode; the switch acquisition module with the freewheeling diode is used for acquiring the switch with the inductive load characteristic, so that the reliability of the circuit is ensured; the whole vehicle high-control switch is connected with a whole vehicle power supply, and if the corresponding high-control switch is closed, an input pin of the high-control switch acquisition module is connected with a whole vehicle 24V power supply; the whole vehicle low-control switch is connected with a whole vehicle ground, and if the corresponding low-control switch is closed, the input pin of the low-control switch acquisition module is connected with the whole vehicle ground.
As shown in fig. 6, taking the wiper high-speed switch acquisition module as an example, since the wiper motor coil is an inductive load, the input end of the switch acquisition module is designed with a freewheeling diode, and the circuit composition is as follows:
if the wiper high-speed switch is closed, the input end of a wiper high-speed switch acquisition module, namely an In _ DIG _01_ H pin, is connected with a vehicle power supply 24V, the negative electrode of a fly-wheel diode D1 is connected with a capacitor CI, a resistor R1, a resistor R2 and a vehicle wiper high-speed switch, the other end of the resistor R2 is connected with a resistor R3 and an AD port ADC0_1 of a single chip S32K144 chip, and the voltage of the ADC0_1 end is 3.07V at the moment;
if the wiper high-speed switch is not closed, the input end of the wiper high-speed high-control switch acquisition module, namely an In _ DIG _01_ H pin, is suspended, the negative electrode of a fly-wheel diode D1 is connected with a capacitor CI, a resistor R1, a resistor R2 and the whole vehicle wiper high-speed switch, the other end of the resistor R2 is connected with a resistor R3 and an AD port ADC0_1 of a single chip S32K144 chip, the AD sampling pin of the single chip S32K144 main chip is 0, and the single chip acquires that the wiper high-speed switch is not closed, namely, the off state.
The other end of the resistor R3 is connected with the resistor R1, the other end of the capacitor C1 and the anode of the fly-wheel diode and is grounded; the resistor R1 and the capacitor C1 form an RC filter circuit to realize the filtering of the input end of the switch acquisition module;
the control system acquires switch information and sends the switch information to the instrument through the CAN bus, the instrument displays the state of each switch in real time, and the corresponding power driving and diagnosing module executes load control logic; all original components of other high-control switching value acquisition modules in the system form and structure reference wiper high-speed switch acquisition modules.
As shown in fig. 7, the low-control switch acquisition module is exemplified by a wiper return switch acquisition module, and the connection mode of the low-control switch acquisition module is as follows: the resistor R37 is connected with a collector of a triode Q4 of the wake-up circuit module, KL30Swt is at a high level in a wake-up state of the single chip microcomputer, the other end of the resistor R37 is connected with a resistor R38, a capacitor C20, a cathode of a voltage stabilizing diode D10 and a wiper return switch, the other end of the resistor R38 is connected with a resistor R39 and an AD port ADC04 of a chip of the single chip microcomputer S32K144, and the other end of the resistor R39 is grounded with the other end of the capacitor C20 and an anode of a voltage stabilizing diode D10; the voltage stabilizing diode D10 has the function of circuit protection, and the capacitor C20 realizes the filtering function. All original components of other low accuse switching value collection modules in this system constitute and the low accuse switching collection module of windscreen wiper return is referred to the structure.
The working principle is as follows: when the system normally works, the KL30Swt is at a high level of 24V, if the wiper return switch is closed, the input end IN _ DIG _01_ L of the wiper return switch acquisition module is grounded, and the voltage of an AD port ADC04 of the single chip microcomputer S32K144 chip is 0, which indicates that the low-control switch is closed; if the wiper return switch is not closed, that is, the input end IN _ DIG _01_ L of the wiper return switch acquisition module is suspended, the KL30Swt end is grounded through the resistor R37, the resistor R38 and the resistor R39 to form a loop, and the voltage of the AD port ADC04 of the single chip microcomputer S32K144 chip is 5V, which indicates that the low-control switch is not closed, that is, the signal acquisition function of the low-control switch is realized.
The switch acquisition module acquires the switch information and sends the switch information to the instrument through the CAN bus, the instrument displays the switch states in real time, and the corresponding power driving and diagnosing module executes the load driving control logic.
The power driving and diagnosing module comprises a left steering lamp of the main vehicle, a right steering lamp of the main vehicle, a rear fog lamp, a front fog lamp relay, a low-speed intermittent relay of a wiper, a daytime running lamp, a vehicle position lamp and a 3-way standby power driving and diagnosing module; the judgment of the type of the driving load lamp, namely the LED lamp or the halogen lamp, can be intelligently finished, and the LED lamp and the halogen lamp can be driven in a compatible manner.
In one embodiment of the present invention, the power driving and diagnosis module employs a power driving chip VND5T035A with current feedback.
When the power driving and diagnosing module does not acquire switch closing information and the key is powered on, the power driving and diagnosing module firstly diagnoses faults of all lamps and checks whether the lamps are open or not; after the switch is closed, detecting the states of the lamp load in real time, namely open circuit, normal and short circuit states; the control system sends the diagnosed lamp state information to the instrument through the CAN bus, the instrument displays the specific diagnosis state of the lamp in real time, and the control strategy is as follows:
in the embodiment, taking a left turn light control strategy of the main vehicle as an example, if the left turn light switch is not closed but the key is powered on, the system firstly performs open circuit detection of the lamp, that is, a high level is output by an IO pin PTA9 of the single chip microcomputer, the triodes Q1 and Q2 are turned on, the power KL30_ B directly drives the load, the driving power chip acquires the current of the load, converts the current into a voltage signal, that is, a corresponding AD value, and sends the voltage signal to the single chip microcomputer S32K144 through an IO pin ADC1_03, whether the load is open or not is judged by sampling the AD value, if the AD value is greater than a set threshold value K1, the lamp is normal, and if the AD value is less than the set threshold value K1, the lamp is open circuit, and open circuit detection of the powered lamp is realized;
if the left steering switch is closed, the singlechip S32K144 acquires that the switch is closed, sends the switch state to the instrument and completes the load driving and diagnosis actions at the same time, and the control strategy is as follows: firstly, the default load is a halogen lamp, the single-chip microcomputer IO pin PTA9 outputs a low level, the single-chip microcomputer IO pin PTE0 and PTE4 outputs a high level, the triode Q3 is conducted, the sampling resistor is the resistance value of the resistors R26 and R27 which are connected in parallel, then the driving chip VND5T035A is used for collecting the current of the load, the current signal is finally converted into a voltage signal through chip processing and resistor sampling, a corresponding AD value is obtained and sent to the single-chip microcomputer S32K144 through the ADC1_03 pin, and the AD value is compared by the single-chip microcomputer, so that the lamp state is judged; if the AD value is smaller, whether the lamp is an LED is judged, the IO pin PTE4 of the singlechip outputs high level, the PTE0 outputs low level, the triode Q3 is cut off, the sampling resistor is a resistor R26, if the obtained AD value is smaller than the LED open circuit threshold value, the open circuit fault of the lamp is judged, and if the obtained AD value is smaller than the LED open circuit threshold value, the lamp is judged to be an LED. The power load control principle of a relay, an electromagnetic valve and the like in the system refers to a left turn light driving module of the main vehicle.
As shown in fig. 8, taking the left turn signal power driving and diagnosing module of the main car as an example, the circuit configuration is as follows: the POWER pin of the POWER driving chip VND5T035A is connected with a vehicle POWER supply KL30_ B, the CS1 pin of the POWER driving chip VND5T035A is connected with resistors R25, R26 and R27, the other end of the resistor R25 is connected with a capacitor C18 and an AD interface ADC1_03 pin of the single chip microcomputer S32K144 chip, and the other ends of the capacitor C18 and the resistor R26 are connected with the ground; the other end of the resistor R27 is connected with the collector of a triode Q3; the base electrode of the triode Q3 is connected with the resistors R28 and R29; the other end of the resistor R28 is connected with an IO driving pin PTE0 of the single chip microcomputer S32K144 chip; the other end of the resistor R29 and the emitter of the triode Q3 are grounded; the IN1 pin of the power driving and diagnostic module is connected with a resistor R31; the other end of the resistor R31 is connected with an IO driving pin PTE4 and a resistor R30 of the single chip microcomputer S32K144 chip; the other end of the resistor R30 is grounded; an output OUT1 pin of the power driving and diagnosing module is connected with a capacitor C19, a TVS tube D8, a cathode of a diode D7 and a driving load; the other ends of the capacitor C19 and the TVS tube D8 are grounded; the anode of the diode D7 is connected with the resistor R24; the other end of the resistor R24 is connected with the collector of the triode Q2; an emitter of the triode Q2 is connected with KL30_ B and the resistor R23; the other end of the resistor R23 is connected with the base electrode of the triode Q2 and the resistor R22; the other end of the resistor R22 is connected with the collector of a triode Q1; the base electrode of the triode Q1 is connected with the resistors R21 and R20; the other end of the resistor R21 and the emitter of the triode Q3 are grounded; the other end of the resistor R20 is connected with an IO drive PTA9 pin of the single chip microcomputer S32K144 chip. The TVS protection is adopted for output, and the damage of overvoltage and overcurrent to the circuit is effectively avoided. All components of power driving and diagnosing modules such as a relay, an electromagnetic valve and the like in the system are composed and structurally refer to a left turn light power driving and diagnosing module of the main vehicle.
As shown in fig. 9, the connection manner of the wake-up circuit module is as follows: the positive electrode of the voltage-regulator tube D9 is connected with the POWER end of the system POWER supply module, the negative electrode of the voltage-regulator tube D9 is connected with the emitter of the triode Q4 and the resistor R33, the collector of the triode Q4 is connected with the KL30Swt pin of the low-control switch module, the base of the triode Q4 is connected with the other ends of the resistor R34 and the resistor R33, the other end of the resistor R34 is connected with the collector of the triode Q5, the base of the triode Q5 is connected with the resistor R35, the other end of the resistor R35 is connected with the pin PTC1 and the resistor R36 of the MCU system module, and the other end of the resistor R36 is grounded with the emitter of the triode Q5.
When the single chip microcomputer is in the wake-up state, the IO driving pin of the single chip microcomputer S32K144 chip outputs a high level, and an input power supply can be provided for the low-control switch acquisition module; when the single chip microcomputer is in a dormant state, the IO driving pin of the S32K144 chip of the single chip microcomputer outputs low level, the low-control switch acquisition module does not have power supply input, and the static current of the controller is effectively reduced.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.
Claims (10)
1. A vehicle intelligent driving and diagnosing system with gateway function, comprising:
MCU system module: the MCU system module is connected with a vehicle CAN bus through a CAN communication module and is used for receiving and processing CAN information from a vehicle bus control unit;
a CAN communication module: the system is used for connecting the MCU system module with the automobile CAN bus and supporting the information transmission between the MCU system module and the automobile bus control unit;
a system power supply module: the power supply conversion device is used for converting a 24V power supply of a vehicle into a 5V power supply required by a main controller and a CAN communication module of a control system;
a power supply diagnosis module: the system is used for diagnosing the voltage condition of the power supply of the whole vehicle in real time and sending the voltage condition to an instrument through a CAN bus;
switching value acquisition module: the system is used for acquiring the on-off states of the vehicle lamp and the windscreen wiper and sending the on-off states to the MCU system module for logical operation;
a power drive and diagnostic module: the fault diagnosis system is connected with a load and used for driving the load and diagnosing faults, wherein the fault diagnosis comprises an open circuit and a short circuit;
the wake-up circuit module: the power supply input device is used for providing an input power supply for the low-control switch acquisition module and disconnecting the power supply input of the low-control switch acquisition module when the single chip microcomputer is in a dormant state.
2. The vehicle intelligent driving and diagnostic system according to claim 1, wherein the MCU system module is connected in a manner of:
a TXCAN0 pin of the MCU system module is connected with a TXD pin of the CAN communication module through a resistor R5; the RXDA 0 pin of the MCU system module is connected with the RXD pin of the CAN communication module through a resistor R6; a PTC9 pin of the MCU system module is connected with an STB pin of the CAN communication module through a resistor R8;
a Reset pin of the MCU system module is connected with a PWRGD pin of the system power supply module through a resistor R13;
the AD pin of the MCU system module is connected with the output end of the power supply diagnosis module;
an ADC01 pin of the MCU system module is connected with one ends of the switch acquisition module resistors R2 and R3;
an ADC1_03 pin of the MCU system module is connected with a CS1 pin of the power driving and diagnosing module through a resistor R25; a PTE0 pin of the MCU system module is connected with a CS1 pin of the power driving and diagnosing module through a resistor R28, a base electrode of a triode Q3, a collector and a resistor R27; an IO driving pin PTE4 of the MCU system module is connected with a power driving and diagnosing module resistor R31; an IO driving pin PTA9 of the MCU system module is connected with a power driving and diagnosing module resistor R20;
and a PTC1 pin of the MCU system module is connected with a base electrode of the wake-up circuit module triode Q5 through a resistor R35.
3. The intelligent vehicle driving and diagnosing system of claim 1, wherein the connection between the CAN communication module and the CAN bus of the vehicle is as follows:
the CANH pin of the CAN communication module is connected with the CANH of a CAN bus of the whole vehicle;
and a CANL pin of the CAN communication module is connected with a CANL of a CAN bus of the whole vehicle.
4. The vehicle intelligent driving and diagnosis system according to claim 1, wherein the inductor L1 of the system power module is connected to the VCC pin of the CAN communication module and the MCU system module through capacitors C10-C15;
the VIN pin of the system power supply module is respectively connected with a complete vehicle power supply KL 30-A, KL 30-B through D3 and D4;
and filtering the whole vehicle POWER supply KL 30-A, KL 30-B to obtain a POWER POWER supply.
5. The vehicle intelligent driving and diagnosis system according to claim 1, wherein the power supply diagnosis module performs status diagnosis on KL30_ A, KL30_ B and a key switch, an input end of the power supply diagnosis module is connected with a power supply to be detected, and an output end of the power supply diagnosis module is connected with an AD pin of the MCU chip.
6. The vehicle intelligent driving and diagnostic system according to claim 1, wherein the switching value acquisition module comprises a high control switch acquisition module and a low control switch acquisition module;
the high-control switch acquisition module is connected with switches of a left steering lamp, a right steering lamp, an emergency alarm, a position lamp, a front fog lamp, a rear fog lamp, a low-speed windscreen wiper, an intermittent windscreen wiper, a starting signal, a high-speed windscreen wiper and a spraying windscreen wiper on the whole vehicle through plug connectors;
the low-control switch acquisition module is connected with a wiper return signal switch on the whole vehicle through a plug connector;
the input end of the switch acquisition module is connected with the whole vehicle switch, and the output end of the switch acquisition module is connected with the AD port of the MCU system module.
7. The vehicle intelligent drive and diagnostic system of claim 1, wherein the power drive and diagnostic module is connected to the load;
the pin IN1 of the power driving and diagnosing module is connected with a resistor R31;
the power driving and diagnosis module output OUT1 pin is connected with a capacitor C19, a TVS tube D8, a diode D7 cathode and a driving load;
a POWER pin of the POWER driving module is connected with a whole vehicle POWER supply KL30_ B;
and the output of the power driving module adopts TVS protection.
8. The intelligent vehicle driving and diagnostic system of claim 1, wherein the wake-up circuit module is connected in a manner of: the anode of the voltage regulator tube D9 is connected with the POWER end of the system POWER supply module; a collector electrode of the triode Q4 is connected with a KL30Swt pin of the low-control switch module; the base of the triode Q5 is connected with the PTC1 of the MCU system module through a resistor R35.
9. The vehicle intelligent driving and diagnosis system according to claim 1, wherein the wake-up circuit module outputs a high level from an IO driving pin of the MCU system module in the wake-up state of the MCU system module to provide an input power to the low-control switch acquisition module; when the MCU system module is in a dormant state, the IO driving pin of the MCU system module outputs a low level, the power supply input of the low control switch acquisition module is disconnected, and the quiescent current is reduced.
10. The vehicle intelligent driving and diagnosing system as recited in claim 1, wherein the quiescent current of the vehicle intelligent driving and diagnosing system can be reduced to 1.5uA in a no-load, off-state condition.
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| CN202220619648.7U CN217124728U (en) | 2022-03-21 | 2022-03-21 | Vehicle intelligent driving and diagnosing system with gateway function |
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