CN205750513U - A kind of Multi-parameter detection device of automobile ABS-ECU - Google Patents

Abstract

The utility model discloses an automobile ABS‑ECU multi-parameter detection device. The device includes a host computer, a central controller, a signal output module, and a signal acquisition module. Among them, the upper computer and the central controller are connected and communicated through the RS232 serial port; the signal output module is realized by the digital-to-analog conversion circuit controlled by the central controller, and is connected to the signal sensor in the ABS-ECU through the fixed terminal; the signal acquisition module It is directly connected to the signal output pin of ABS‑ECU, and the output signal is converted to the central controller. In the utility model, the entire detection process of controlling the automobile ABS-ECU is realized through the upper computer, and no actual vehicle detection is required, which saves economic expenditure and improves detection efficiency.

Description

A multi-parameter detection device for automobile ABS-ECU

technical field

The utility model belongs to the technical field of vehicle engineering and relates to a detection device for an automobile ABS-ECU.

Background technique

ABS is a key component to ensure the safety of automobile braking. In the development, matching and troubleshooting, it is necessary to test the functional algorithm, bus function and durability of ABS-ECU, and realize the quality of ECU product software through black box testing or system testing methods evaluation.

Accurate and reliable results can be obtained by using real vehicle tests, but there are many unfavorable factors such as poor economy, low measurement efficiency, inability to meet all working conditions, and safety risks for experimenters.

Contents of the invention

Aiming at the deficiencies of the background technology, the purpose of this utility model is to provide a simulation test device to realize the simulation and comprehensive detection of automobile ABS-ECU parameters.

The technical scheme that the utility model solves its technical problem adopts is:

Automotive ABS-ECU multi-parameter detection device, including upper computer, central controller, signal output module and signal acquisition module. Among them, the upper computer and the central controller are connected and communicated through the RS232 serial port; the signal output module is realized by the digital-to-analog conversion circuit controlled by the central controller, and is connected to the signal sensor in the ABS-ECU of the tested equipment through fixed terminals; The signal acquisition module is directly connected to the signal output pin of the ABS-ECU of the tested equipment, and the output signal is converted to the central controller.

The signal output module includes a fault light signal output module, a fault flash code signal output module, a drive valve signal output module, a wheel speed signal output module, a key switch signal output module, and a brake switch signal output module.

The signal collection module includes a fault light signal collection module, a fault flash code signal collection module, a drive valve signal collection module, a wheel speed signal collection module, a key switch signal collection module and a brake switch signal collection module.

Compared with the background technology, the beneficial effects of the utility model are:

1. The ABS-ECU detection device in the utility model does not need real vehicle inspection, which reduces the consumption of economy and manpower.

2. The parameters that can be detected by the detection device are very comprehensive, which avoids the trouble of multiple inspections for different parameters.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is a work flow diagram of the utility model.

detailed description

As shown in Figure 1, it is a schematic diagram of the automobile ABS-ECU multi-parameter detection device of the present invention, which device includes a host computer 1, a central controller 2, a signal output module 3, and a signal acquisition module 4. Among them, the upper computer and the central controller are connected and communicated through the RS232 serial port; the signal output module is realized by the digital-to-analog conversion circuit controlled by the central controller, and is connected to the signal sensor in the ABS-ECU 17 of the tested equipment through a fixed terminal ; The signal acquisition module is directly connected to the signal output pin of the ABS-ECU, and the output signal is converted to the central controller. According to the above detection items and shown in Figure 1, the signal output module includes a fault light signal output module 5, a fault flash code signal output module 6, a drive valve signal output module 7, a wheel speed signal output module 8, and a key switch signal output module 9. The brake switch signal output module 10. The signal collection module includes a fault light signal collection module 11, a fault flash code signal collection module 12, a drive valve signal collection module 13, a wheel speed signal collection module 14, a key switch signal collection module 15 and a brake switch signal collection module 16.

The upper computer realizes the selection of detection items, the transmission of detection item signals and real-time display. The central controller receives the signal sent by the upper computer, judges and outputs the analog signal of the corresponding detection item, and then obtains the signal output by the ECU and displays it in the upper computer after processing. Signal output modules such as fault lights and fault flash codes are completed by digital/analog (D/A) conversion circuits. The signal acquisition module of fault lights and fault flash code lights is completed by an analog/digital (A/D) conversion circuit.

The above-mentioned central controller is a 32-bit ARM microcontroller STM32F103.

The working process of the utility model is shown in Figure 2. After the system is powered on, it first reads the interior of the ABS-ECU, and initially judges whether the ECU is qualified. If it is unqualified, it directly ends the detection. Then select the test item, and carry out static test, dynamic test, additional test and fault test successively according to the selected test item. After testing is complete, read and clear the DTCs. Finally, the test data is counted and reported.

The specific project inspection process is as follows:

1) Fault light/fault flash code detection: The upper computer sends out start and stop brake switch signals (1-way I/O control relay), receives the fault light pin voltage signal, and displays the fault through the change of the fault light pin signal codes and information.

2) Wheel speed static detection: The upper computer sends 2 voltage pulse signals (VSO, OBD, OC gate signals) with a frequency of (0-2) KHz to monitor and display the changes in the wheel speed output pin signal.

3) Wheel speed dynamic detection: the upper computer sends four wheel speed signals, brake switch signals, acceleration, adds arbitrary wave interference signals, receives CAN signals (including four wheel speed signals, brake switch signals), and 8 coil voltages Analog signal, VSO, OBD, fault light, electrode voltage and current signal.

4) Abnormal detection of valve drive: communication between upper computer and ABS-ECU products, control coil and motor energization, receive 8-way voltage analog signal, 1-way motor voltage signal and 1-way motor current signal, detect coil power supply and motor power supply .

5) K line/CAN line communication detection: the upper computer sends CAN protocol and K protocol signals, communicates with ABS-ECU products, and receives CAN protocol and K protocol signals, that is, serial number, production date, software version, hardware version, Release date, system configuration information, and display on the human-computer interaction interface.

6) Abnormal detection of key switch: the host computer sends on and off key switch voltage analog signals (1 channel I/O control relay, 1 channel A/D), and receives 1 channel voltage signal, so as to realize the control of the product key switch on and off .

7) Key switch abnormality detection.

8) Brake switch abnormality detection: The host computer sends on and off brake switch signals, and receives a voltage signal, so as to realize the on-off control of the product brake switch.

9) Fault diagnosis and detection: It can be realized by manual setting and computer setting. When setting manually, the operation switch controls the on-off of the corresponding relay coil, and the contact of the relay completes the operations such as open circuit and short circuit of the simulated fault point. Press a certain fault switch button, the system can carry out the corresponding fault simulation test; when the computer is automatically set, the control signal is sent by the IO port of the measurement and control card, and the corresponding relay is controlled by the power drive circuit to realize the same function as manual control , but computers can automatically and quickly accomplish the same task. At the same time, when the relay is setting the fault, it also turns on the corresponding fault setting indicator light to remind the operator of the current fault state.

Claims (1)

1. automobile ABS-ECU Multi-parameter detection device, this device includes host computer (1), central controller (2), signal output module (3) and signal acquisition module (4)；It is characterized in that: be attached and communication by RS232 serial ports between host computer (1) and central controller (2)；Signal output module (3) is controlled D/A converting circuit by central controller (2) and realizes, and by link terminal and tested device A BS-ECU(19) in signal transducer be connected；Signal acquisition module (4) is directly connected with the signal output pin of tested device A BS-ECU, converted outputs signal to central controller (2)；

Described signal output module (3) includes that trouble light signal output module (5), fault are dodged code signal output module (6), driven valve signal output module (7), wheel speed signal output module (8), key switch signal output module (9), brake switch signal output module (10)；

Described signal acquisition module (4) includes that trouble light signal acquisition module (11), fault are dodged code signal acquisition module (12), driven valve signal acquisition module (13), wheel velocity signal capturing module (14), key switch signal acquisition module (15) and brake switch signal acquisition module (16).