An FCT automated tooling equipment for ESC

Abstract

The present invention discloses a FCT automated tooling device for ESC, which belongs to the technical field of ESC test systems. The test software module sets parameters and downloads the test program of ESC to PCBA through a CAN communication module. The test software module receives PCBA data information through a CAN communication module, and transmits the data information to a test bench module through an information acquisition module. The control test bench module performs signal simulation on the PCBA, and a fault simulation module has corresponding action performance. The test software collects simulation results through a signal acquisition module and displays them through a CAN communication module, and compares them with relevant standards to determine whether the test function has passed. The present invention uses FCT automation to test various performances of ECS, saves manpower and material resources, greatly reduces test costs, and avoids the dangers brought by real vehicle testing.

Description

Technical Field

[0001] The present invention belongs to the technical field of ESC test systems, and more particularly relates to an FCT automated tooling device for ESC. Background Art

[0002] The electronic stability control system (ESC) of a vehicle is a new type of active safety system for vehicles. It is a further extension of the functions of the anti-lock braking system (ABS) and traction control system (TCS). On this basis, it adds electronic brake-force distribution (EBD), vehicle stability control (VCS), etc., and controls the driving force and braking force of the front, rear, left and right four wheels through the ECU to ensure the lateral stability of the vehicle.

[0003] ESC mainly controls the longitudinal and lateral stability of the vehicle. Since the tires are prone to lock when braking in an emergency, the steering wheel cannot be turned, which can easily cause great danger. When developing a vehicle stability system, it is necessary to conduct a large number of tests on circuit functions and methods, collect relevant data, and analyze it through relevant software. However, there are many disadvantages in using actual vehicle experiments. For example, the test requires the actual vehicle ABS, EPB, steering, acceleration and other functions. The actual vehicle experiment is costly, very dangerous, time-consuming, costly, and has a high risk factor. At the same time, there will also be certain errors and randomness. If a dedicated test bench is used to replace some whole vehicle experiments, it can not only shorten the development time, but also reduce the experimental cost, while ensuring the safety of personnel.

[0004] Therefore, providing an FCT automated tooling equipment for ESC to test the functions of ESC through automation and reduce the cost and risk of actual vehicle testing is an urgent problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides an FCT automated tooling device for ESC to achieve automated testing of ESC functions, save manpower and material resources, and reduce testing costs and risks of actual vehicle testing.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions, including:

[0007] An FCT automated tooling device for ESC, comprising a programmable power supply, a test software module, a CAN communication module, a signal acquisition module, a test bench module, a fault simulation module, and a PCBA;

[0008] The programmable power supply is simultaneously connected to the test software module and the PCBA, and the test software module, signal acquisition module, test bench module and PCBA are connected in sequence; the test software module is also connected to the PCBA via the CAN communication module; the PCBA and signal acquisition module are both connected to the fault simulation module;

[0009] The programmable power supply supplies power to the test software module and PCBA, and the test program of the ESC is downloaded to the PCBA through the CAN communication module by setting parameters in the test software module; the test software module receives data information from the PCBA through the CAN communication module, and transmits the data information of the PCBA to the test bench module through the information acquisition module, controls the operation of the test bench module, performs signal simulation on the PCBA, and the fault simulation module displays corresponding action performance according to the signal simulation state; the simulation result is collected by the test software module through the signal acquisition module, and the test result and product serial number are displayed on the test software module through the CAN communication module, and compared with the standard of the test function to determine whether it is qualified.

[0010] Preferably, the test software module, CAN communication module, and programmable power supply constitute a first circuit for program burning and receiving data information from the ESC.

[0011] Preferably, the test software module, signal acquisition module, test bench module, PCBA and CAN communication module constitute a second loop, which is used to control the test bench module, perform signal simulation on the PCBA, and obtain data information from the ESC in the PCBA through the CAN communication module and display it on the test software module.

[0012] Preferably, the test bench module includes an analog switch matrix, a light control module, a pressure sensor module and a wheel speed test equipment;

[0013] The simulation switch matrix performs switch simulation; the wheel speed test equipment performs wheel speed testing; the pressure sensor module sets a fixed pressure value, simultaneously collects pressure, and compares the collected actual pressure value with the set pressure value; the test software module issues a pressure increase, pressure maintenance, or pressure relief instruction based on the comparison result;

[0014] The fault simulation module includes an HCU load, a motor simulation load and an indicator light simulation circuit; wherein the information acquisition module is connected to the indicator light simulation circuit; the HCU load is used to test the solenoid valve and motor of the ESC.

[0015] Preferably, the fault simulation module displays corresponding action performance according to the signal simulation state, including: the solenoid valve and motor simulation load on the HCU are opened or closed according to the instructions of the software test module for boosting, maintaining pressure and releasing pressure, and the corresponding EPB and ESC indicator lights flash.

[0016] Preferably, the wheel speed testing equipment performs the following steps for the wheel speed test:

[0017] The specific frequency signal given by the board acquisition card is sent to the wheel speed test equipment to drive the LR and RR gears to rotate, connect the LR wheel speed sensor and the RR wheel speed sensor, and collect the LR and RR signals of the LR wheel speed sensor and the RR wheel speed sensor through the wheel speed acquisition module of the ESC test circuit board;

[0018] The pulse signal output by the VSO signal output module on the ESC test circuit board is transmitted to the wheel speed test equipment to drive the LF and RF gears to rotate, connect the LF sensor and the RF wheel speed sensor, and connect the LF wheel speed sensor and the RF wheel speed sensor to the wheel speed acquisition module of the ESC test circuit board to collect the LF and RF signals;

[0019] The IMU is tested by simulating the rotation of the control frame through the test bench module.

[0020] It can be seen from the above technical solution that, compared with the prior art, the FCT automated tooling equipment for ESC provided by the present invention includes a programmable power supply, a test software (industrial computer) module, a CAN communication module, a signal acquisition module, a test bench module, a fault simulation module and a PCBA; wherein the test software module can both receive data from the CAN communication module and communicate with the PCBA through the CAN communication module, the module is reasonably used and the module utilization rate is high; the present invention pre-sets the working parameters in the software test module, which can realize program burning of different products, and uses FCT automation to test various performances of the ECS, saving manpower and material resources, greatly reducing testing costs, and avoiding the dangers brought by actual vehicle testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a system framework diagram of an FCT automated tooling equipment for ESC provided by the present invention;

[0022] Figure 2 A schematic diagram of the working structure of the wheel speed testing equipment provided by the present invention;

[0023] Figure 3 A schematic diagram of a software solution for FCT automated tooling equipment for ESC provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] The embodiment of the present invention proposes an FCT automated tooling device for ESC, such as Figure 1 As shown, it includes programmable power supply, test software module, CAN communication module, signal acquisition module, test bench module, fault simulation module and PCBA;

[0026] The programmable power supply is connected to the test software module and PCBA at the same time. The test software module, signal acquisition module, test bench module and PCBA are connected in sequence. The test software module is also connected to the PCBA via the CAN communication module. The PCBA and signal acquisition module are both connected to the fault simulation module.

[0027] The programmable power supply supplies power to the test software module and PCBA. The parameters of the test software module are set to download the ESC test program to the PCBA through the CAN communication module. The test software module receives data information from the PCBA through the CAN communication module, and transmits the data information of the PCBA to the test bench module through the information acquisition module. The test bench module is controlled to simulate signals on the PCBA, and the fault simulation module displays corresponding action performance according to the signal simulation status. The simulation results are collected by the test software module through the signal acquisition module, and the test results and product serial number are displayed on the test software module through the CAN communication module, and compared with the test function standards to determine whether they are qualified.

[0028] The test bench module includes a simulated switch matrix, a light control module, a pressure sensor module, and wheel speed test equipment; the fault simulation module includes an HCU load, a motor simulated load, and an indicator light simulation circuit; the information acquisition module is connected to the indicator light simulation circuit;

[0029] During the specific implementation, the analog switch matrix performs switch simulation;

[0030] Wheel speed test equipment is used to perform wheel speed test; the specific steps of wheel speed test are as follows: Figure 2As shown in the figure: the specific frequency signal given by the board acquisition card is sent to the wheel speed test equipment to drive the LR and RR gears to rotate, and the LR wheel speed sensor and the RR wheel speed sensor are connected. The LR and RR signals of the LR wheel speed sensor and the RR wheel speed sensor are collected through the wheel speed acquisition module of the ESC test circuit board; the pulse signal output by the VSO signal output module on the ESC test circuit board is transmitted to the wheel speed test equipment to drive the LF and RF gears to rotate, and the LF sensor and the RF wheel speed sensor are connected. The LF wheel speed sensor and the RF wheel speed sensor are then connected to the wheel speed acquisition module of the ESC test circuit board to collect the LF and RF signals; the test bench module simulates the rotation of the control frame to test the IMU;

[0031] The pressure sensor module sets a fixed pressure value, collects pressure at the same time, and compares the actual pressure value collected with the set pressure value. The test software module issues a pressure increase, pressure maintenance or pressure relief instruction based on the comparison result;

[0032] The HCU load is used to test the solenoid valves and motors of the ESC.

[0033] The fault simulation module displays corresponding action performance according to the signal simulation status, including: the solenoid valve and motor simulated load on the HCU are opened or closed according to the instructions of the software test module for boost, pressure maintenance and pressure relief, and the corresponding EPB and ESC indicator lights flash.

[0034] Furthermore, the test software module, the CAN communication module, and the programmable power supply constitute a first circuit for program burning and receiving data information from the ESC.

[0035] The test software module, signal acquisition module, test bench module, PCBA and CAN communication module constitute the second loop, which is used to control the test bench module, simulate the signal of PCBA, obtain the data information from ESC in PCBA through CAN communication module and display it on the test software module.

[0036] like Figure 3As shown, the software structure of the present invention includes a LabVIEW host computer (industrial computer), a power supply, a CAN card (CAN communication module), a NI board (information acquisition module), an ECU (PCBA), and a self-made analog control circuit. The LabVIEW host computer burns the test program to the ECU via the CAN card and sends control commands via the NI board. Based on the test data fed back by the ECU via the CAN card, the test item is checked for pass, and the test result data is recorded and stored. In the above process, the LabVIEW host computer not only receives data from the CAN card, integrates it and transmits it to the ESC ECU, but also receives parameters from the ECU, integrates it and transmits it to the NI board. It can be seen that the LabVIEW host computer serves as both a parameter setting and output module and a terminal receiving and data display module, and its functions are reasonably integrated, thereby improving utilization.

[0037] In a specific implementation, a programmable power supply provides 12V power to the test software (industrial computer) module and PCBA. The test software module detects the current (current range: 1.5-0.2A), performs a preliminary power-on test on the PCBA, downloads production line test software via the CAN card, controls the IGN (ignition switch) on and off, checks whether the IGN is dormant when powered off, and tests whether CAN data is still being transmitted on the bus. When the IGN is powered on, data transmission is normal. The host computer controls the relay on and off, and simulates switching using a simulated switch matrix. The motor simulates a load and rotates at three speeds: high, medium, and low. The indicator light simulation circuit controls the on and off of the PCBA, and the signal acquisition module collects signals and detects the current value to determine compliance. The industrial computer issues a test command to simultaneously test the simulated loads of the left and right motors, while also collecting feedback current. The solenoid valve performs current and current tests, the eight linear valves perform high, medium, and low speed tests, and the four switch valves perform on-off tests (primarily testing the HCU load). The acquisition card sends a specific frequency signal to the wheel speed test equipment, driving the LR and RR gears to rotate. The LR and RR wheel speed sensors are then connected. The wheel speed acquisition module on the ESC test circuit board collects the LR and RR signals. The pulse signal output by the VSO signal output module on the ESC test circuit board is connected to the wheel speed test equipment, driving the LF and RF gears to rotate. The LF and RF wheel speed sensors are then connected to the wheel speed acquisition module on the ESC test circuit board for speed acquisition. The test bench module simulates the rotation of the control frame to test the IMU. The pressure sensor module is given a fixed pressure value and simultaneously collects pressure. By comparing the actual pressure value with the set pressure value, ESC pressure acquisition and comparison are achieved.

[0038] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0039] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An FCT automated tooling equipment for ESC, characterized in that: Including programmable power supply, test software module, CAN communication module, signal acquisition module, test bench module, fault simulation module and PCBA; The programmable power supply is simultaneously connected to the test software module and the PCBA, and the test software module, signal acquisition module, test bench module and PCBA are connected in sequence; the test software module is also connected to the PCBA via the CAN communication module; the PCBA and signal acquisition module are both connected to the fault simulation module; The programmable power supply supplies power to the test software module and PCBA, and the test software module sets parameters to download the ESC test program to the PCBA via the CAN communication module; the test software module receives data information from the PCBA via the CAN communication module, and transmits the data information from the PCBA to the test bench module via the signal acquisition module, controls the operation of the test bench module, performs signal simulation on the PCBA, and the fault simulation module displays corresponding action performance according to the signal simulation state; the simulation results are collected by the test software module via the signal acquisition module, and displayed on the test software module via the CAN communication module, and compared with the test function standard to determine whether it is qualified; The test bench module includes an analog switch matrix, a light control module, a pressure sensor module and a wheel speed test equipment; The simulation switch matrix performs switch simulation; the wheel speed test equipment performs wheel speed testing; the pressure sensor module sets a fixed pressure value, simultaneously collects pressure, and compares the collected actual pressure value with the set pressure value; the test software module issues a pressure increase, pressure maintenance, or pressure relief instruction based on the comparison result; The fault simulation module includes an HCU load, a motor simulation load, and an indicator light simulation circuit; wherein the signal acquisition module is connected to the indicator light simulation circuit; the HCU load is used to test the solenoid valve and motor of the ESC; The fault simulation module displays corresponding action performance according to the signal simulation state, including: The solenoid valve and motor simulated load on the HCU are opened or closed according to the pressure increase, pressure maintenance and pressure relief instructions of the test software module, and the corresponding EPB and ESC indicators flash; The steps of performing wheel speed testing with the wheel speed testing equipment are as follows: The frequency signal given by the board acquisition card is sent to the wheel speed test equipment to drive the LR and RR gears to rotate, connect the LR wheel speed sensor and the RR wheel speed sensor, and collect the LR and RR signals of the LR wheel speed sensor and the RR wheel speed sensor through the wheel speed acquisition module of the ESC test circuit board; The pulse signal output by the VSO signal output module on the ESC test circuit board is transmitted to the wheel speed test equipment to drive the LF and RF gears to rotate, connect the LF sensor and the RF wheel speed sensor, and connect the LF wheel speed sensor and the RF wheel speed sensor to the wheel speed acquisition module of the ESC test circuit board to collect the LF and RF signals; The IMU is tested by simulating the rotation of the control frame through the test bench module.

2. The FCT automated tooling equipment for ESC according to claim 1, characterized in that: The test software module, CAN communication module and programmable power supply constitute a first circuit, which is used for program burning and receiving data information from the ESC.

3. The FCT automated tooling equipment for ESC according to claim 1, characterized in that: The test software module, signal acquisition module, test bench module, PCBA and CAN communication module constitute a second loop, which is used to control the test bench module, perform signal simulation on the PCBA, and obtain data information from the ESC in the PCBA through the CAN communication module and display it on the test software module.

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