CN210442431U

CN210442431U - Complete vehicle circuit and sensor detection equipment

Info

Publication number: CN210442431U
Application number: CN201921090242.9U
Authority: CN
Inventors: 蔡继业; 屈亚峰; 王超; 王伟
Original assignee: Shanghai Xingrong Automotive Technology Co ltd
Current assignee: Shanghai Xingrong Automotive Technology Co ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-05-01
Anticipated expiration: 2029-07-12

Abstract

The utility model provides a whole car circuit and sensor check out test set, includes control MCU, CAN communication circuit module, MOS drive circuit module, digital analog circuit module, modulus circuit module, switching circuit module, DB15 interface and is used for the communication module with the communication of diagnosis host computer, CAN communication circuit module, MOS drive circuit module, digital analog circuit module, modulus circuit module and communication module all with control MCU connects, CAN communication circuit module with DB15 interface connection, MOS drive circuit module, digital analog circuit module and modulus circuit module warp switching circuit module with DB15 interface connection. The utility model discloses can carry out accurate, high-efficient, convenient detection to whole car circuit and sensor.

Description

Complete vehicle circuit and sensor detection equipment

Technical Field

The utility model relates to a vehicle diagnosis technical field especially relates to a whole car circuit and sensor check out test set.

Background

At present, the detection modes of domestic commercial vehicle circuits and sensors are mainly two, one mode is detection through a conventional instrument, the method has great defects, and particularly under the condition that the vehicle circuits are in poor contact or aged, although the instrument is used for testing normally, the method is not in accordance with the actual condition; in addition, the other method is to adopt a lamp testing method to detect the automobile circuit, the appearance of the lamp testing on the market at present is like a special ball pen, the front end of the lamp testing device is provided with a pointed probe, one end of the probe testing device is connected with the circuit ground end of the automobile during measurement, the probe is used for detecting the electricity existence condition of the automobile circuit, the method can only detect the electricity existence condition of the circuit, the actual circuit voltage value cannot be reflected, the operation time is long, the test operation cannot be carried out in some special places in the automobile, even hands are easily injured, and the operation of a machine is inconvenient at night.

SUMMERY OF THE UTILITY MODEL

Based on this, to above-mentioned technical problem, provide a whole car circuit and sensor check out test set.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a whole car circuit and sensor check out test set, includes control MCU, CAN communication circuit module, MOS drive circuit module, digital analog circuit module, modulus circuit module, switching circuit module, DB15 interface and is used for the communication module with the communication of diagnosis host computer, CAN communication circuit module, MOS drive circuit module, digital analog circuit module, modulus circuit module and communication module all with control MCU connects, CAN communication circuit module with DB15 interface connection, MOS drive circuit module, digital analog circuit module and modulus circuit module warp switching circuit module with DB15 interface connection.

The communication module comprises a Bluetooth module and a USB interface module, and the Bluetooth module and the USB interface module are connected with the control MCU.

The scheme further comprises an LED lamp and a buzzer, wherein the LED lamp and the buzzer are connected with the control MCU.

The control MCU adopts stm32 MCU.

The utility model discloses can carry out accurate, high-efficient, convenient detection to whole car circuit and sensor.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:

fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1, the complete vehicle circuit and sensor detection device includes a control MCU11, a CAN communication circuit module 12, a MOS driving circuit module 13, a digital-analog circuit module 14, an analog-digital circuit module 15, a switching circuit module 16, a DB15 interface 17, and a communication module 18 for communicating with a diagnostic upper computer.

In this embodiment, the control MCU11 employs a stm32 MCU.

The CAN communication circuit module 12, the MOS driving circuit module 13, the digital-to-analog circuit module 14, the analog-to-digital circuit module 15 and the communication module 18 are all connected with the control MCU 11.

The CAN communication circuit module 12 is connected to the DB15 interface 17.

The MOS driving circuit module 13, the digital-analog circuit module 14 and the analog-digital circuit module 15 are connected to the DB15 interface 17 through the switching circuit module 16.

The MOS driving circuit module 13 can perform high control and low control of the same output pin, and can be used for driving some actuator units of an automobile, such as an EGR valve.

In this embodiment, communication module 18 includes bluetooth module and USB interface module, and bluetooth module and USB interface module all are connected with control MCU11, the diagnosis host computer can pass through bluetooth module or USB interface module with the utility model discloses equipment carries out the communication, has the app procedure on the diagnosis host computer, supplies the user to send out the instruction down.

The switching circuit module 16 is constituted by a relay.

The utility model discloses have following detection function:

1. measuring voltage

The communication module 18 sends a measurement voltage command from the host computer to the control MCU11, the control MCU11 cuts off the MOS drive circuit module 13 from the DB15 interface 17 through the switching circuit module 16 (the MOS drive circuit module 13 may affect the measurement accuracy), and converts the voltage at the DB15 interface pin into the ADC measurable range of the control MCU11 through the analog-to-digital circuit module 15, and obtains the actual voltage value of the pin through the ADC calculation of the control MCU 11.

If the accelerator pedal circuit can be diagnosed, a special wire harness is connected in series between the accelerator pedal and the corresponding joint, the joint of the special wire harness is connected with the DB15 interface 17, a detector steps on the accelerator pedal, and the analog-digital circuit module 15 acquires six signal voltages for the detector to diagnose.

2. Measuring resistance

The function is an expansion of the measurement voltage, the communication module 18 sends a measurement resistance instruction from the upper computer to the control MCU11, the control MCU11 cuts off the connection between the MOS drive circuit module 13 and the DB15 interface 17 through the switching circuit module 16, the analog-digital circuit module 15 converts the voltage on the DB15 interface 17 pin into the ADC measurable range of the control MCU11, and the actual resistance value of the pin is obtained through the ADC calculation of the control MCU 11.

3. Driving actuator

The communication module 18 sends a measurement driving instruction from the upper computer to the control MCU11, the control MCU11 communicates the MOS driving circuit module 13 with the DB15 interface 17 through the switching circuit module 16, the MOS driving circuit module 13 can select PWM high control, PWM low control, 5V output and the like according to the measurement driving instruction, and the analog-to-digital circuit module 15 can detect the voltage value at the pin of the DB15, at this time, the purpose of detecting the voltage value is only for reference, so the influence of the MOS driving circuit module 13 does not need to be considered.

In diagnosing a vehicle internal actuator, such as an EGR valve, a dedicated wiring harness is used to connect the EGR valve to DB15 interface 17. The EGR valve is enabled to enter a working state through the MOS driving circuit module 13, and meanwhile, the change of the corresponding terminal voltage is collected. And the detection personnel judges whether the EGR valve is normally driven or is blocked according to the data fed back by the EGR valve and the voltage change.

4. CAN bus communication

The communication module 18 sends a CAN communication instruction from the upper diagnostic computer to the control MCU11, the control MCU11 communicates the CAN communication circuit module 12 with the DB15 interface 17 through the switching circuit module 16, so that the instruction is sent to the vehicle through a CAN pin of the DB15 interface, meanwhile, if information is received through a CAN pin of the DB15, the CAN communication circuit module 12 sends the information received by the CAN pin to the control MCU11, and then the information is sent to the upper diagnostic computer, and meanwhile, the change of the corresponding terminal voltage CAN be collected through the analog-digital circuit module 15.

As in diagnosing a nitrogen oxygen sensor, a dedicated wiring harness is used to connect the nitrogen oxygen sensor to the DB15 interface 17. The nitrogen-oxygen sensor is activated through the CAN communication circuit module 12 and the DB15 interface 17, so that the nitrogen-oxygen sensor enters a working state, and data fed back by the nitrogen-oxygen sensor and the collected voltage change CAN be diagnosed by detection personnel, such as whether the nitrogen-oxygen concentration is less than 45ppm, whether the oxygen concentration is 18% -22%, whether the system current is about 600ma, and the like.

5. Analog voltage output

The communication module 18 sends an analog voltage output instruction from the upper computer to the controller

The MCU11 controls the MCU11 to cut off the MOS driving circuit module 13 from the DB15 interface 17 through the switching circuit module 16, converts voltage data to be converted into corresponding voltage through the digital-analog circuit module 14 and outputs the voltage through the DB15 interface 17, and meanwhile, the accuracy of analog output is guaranteed through PID control. In addition, the change of the corresponding terminal voltage can be acquired through the analog-to-digital circuit module 15.

If the intake pressure can be simulated by simulating the voltage output, a special wiring harness is used to connect the intake pressure sensor connector on the vehicle with the DB15 interface 17. The DB15 interface 17 outputs different signal voltages to simulate different air inlet pressures, and the ECU of the vehicle controls the vehicle operation according to the received air inlet pressure, so that diagnosis can be performed according to the vehicle performance.

The utility model discloses can also set up LED lamp 19a and bee calling organ 19b, LED lamp 19a and bee calling organ 19b all are connected with control MCU11, and LED lamp 19a can carry out the light suggestion, under the voltage transfinites or the system current transfinites the circumstances such as, bee calling organ 19b can report to the police.

However, those skilled in the art should realize that the above embodiments are only used for illustrating the present invention and not used as a limitation of the present invention, and that the changes and modifications to the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.

Claims

1. The utility model provides a whole car circuit and sensor check out test set, its characterized in that, including control MCU, CAN communication circuit module, MOS drive circuit module, digital analog circuit module, modulus circuit module, switching circuit module, DB15 interface and be used for with the communication module of diagnosing the host computer communication, CAN communication circuit module, MOS drive circuit module, digital analog circuit module, modulus circuit module and communication module all with control MCU connects, CAN communication circuit module with DB15 interface connection, MOS drive circuit module, digital analog circuit module and modulus circuit module warp switching circuit module with DB15 interface connection.

2. The vehicle circuit and sensor detection device according to claim 1, wherein the communication module comprises a bluetooth module and a USB interface module, and both the bluetooth module and the USB interface module are connected to the control MCU.

3. The vehicle circuit and sensor detection device according to claim 1 or 2, further comprising an LED lamp and a buzzer, wherein the LED lamp and the buzzer are both connected with the control MCU.

4. The vehicle circuit and sensor detection device of claim 3, wherein the control MCU is a stm32 MCU.