New energy automobile power transmission system high-speed measurement and control platform architecture

Abstract

The invention relates to the field of electric automobile testing, in particular to a high-speed measurement and control platform architecture for a new energy automobile power transmission system. A high-speed data acquisition module comprises a high-speed parallel sampling module and an industrial field internet Ethercat communication module, the high-speed parallel sampling module is used for acquiring parameters, and the acquired data are transmitted to a slave station through the industrial field internet Ethercat communication module and uploaded to a master station through the slave station. And data issued by the master station is issued to the high-speed parallel sampling module through the slave station for controlling the execution device. Through optimal design of the master station and the slave station, integration of data acquisition, transmission, control and analysis and utilization is realized, and data acquisition and control are convenient to increase or decrease, so that continuous change of data acquisition and control requirements in design and development can be met, and different data acquisition, control, use and analysis requirements can be met.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle testing, and in particular to a high-speed measurement and control platform architecture for a power transmission system of a new energy vehicle. Background Art

[0002] At present, pure electric vehicles among new energy vehicles still have many problems such as slow speed and short driving range, which are mainly solved by improving the efficiency of the drive motor in the power system and improving the performance of the on-board battery. In the development process of the whole vehicle, it is necessary to monitor the running status of the whole vehicle in real time, diagnose faults, continuously record the long-term test running data of the whole vehicle, and conduct offline analysis. Involving acquisition modules, real-time control modules, high-speed measurement and control and other technologies, it is necessary to organically integrate these technologies to achieve integrated and modular design and development, and improve system development capabilities.

[0003] The Chinese invention patent "Semi-physical simulation platform for electric vehicle drive system" (application number 201310261679.5) discloses a real-time simulator, which integrates a virtual driver model, a virtual vehicle model and a virtual driving condition, and also includes a power supply, an electric drive system and a load simulation system, which are all physical objects; during the simulation cycle, the virtual driver model judges the deviation between the speed of the virtual driving condition and the actual speed of the electric drive system, and accelerates, drives at a constant speed or decelerates. The virtual driver model sends an accelerator pedal signal or a brake pedal signal to the electric drive system to change it. The virtual vehicle model calculates the speed to be reached in the next cycle based on the estimated value and the current actual speed, and the load simulation system changes the load torque; the present invention adopts a forward simulation structure, and the energy and control signal flow are consistent with the actual driving process of the car, which is closer to the actual operating condition of the electric drive system; and the driver model is introduced, which is consistent with the actual driving process. This patent only processes the speed data collected by the implementation, and does not disclose the specific communication method and data collection method, so it cannot be used in the development of automobiles. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a high-speed measurement and control platform architecture for a new energy vehicle power transmission system. The high-speed data acquisition module of the present invention includes a high-speed parallel sampling module and an industrial field Internet Ethercat communication module. The high-speed parallel sampling module is used to collect parameters, and the collected data is transmitted to the slave station through the industrial field Internet Ethercat communication module and uploaded to the master station through the slave station. The data sent by the master station is sent to the high-speed parallel sampling module through the slave station for controlling the actuator. The present invention realizes the integration of data acquisition and control, transmission and analysis and utilization through the optimized design of the master and slave stations, and data and control acquisition are easy to increase or decrease, which can meet the ever-changing requirements of data acquisition and control in design and development, and meet different data acquisition and control usage and analysis needs.

[0005] The technical solution of the present invention is: a high-speed measurement and control platform architecture for a new energy vehicle power transmission system, including a high-speed data acquisition module, a real-time control module and a high-speed measurement and control software module, characterized in that: the high-speed data acquisition module includes a high-speed parallel sampling module and an industrial field Internet Ethercat communication module, the high-speed parallel sampling module is used to collect parameters, and the collected data is transmitted to the slave station through the industrial field Internet Ethercat communication module and uploaded to the master station through the slave station, and the data sent by the master station is sent to the high-speed parallel sampling module through the slave station for controlling the actuator; the real-time control module includes a distributed Ethercat master-slave station architecture, FP GA real-time control module; the distributed Ethercat master-slave station architecture adopts the EtherCAT network structure in master-slave mode; the high-speed measurement and control software module includes signal filtering processing and multi-signal display analysis and recording modules. The signal filtering processing filters the data collected by the master station, and the filtered data is displayed, analyzed and recorded by multiple signals to realize the analysis and management of the collected data. The high-speed measurement and control software module customizes the test interface of the industrial computer according to the parameter requirements of the tested device, test motor and environmental chamber, transmits the control quantity through the EtherCAT bus, and collects the feedback values ​​of the tested device, test motor and sensor tests in the environmental chamber back to the industrial computer for closed-loop control.

[0006] According to the high-speed measurement and control platform architecture of the new energy vehicle power transmission system as described above, it is characterized in that the real-time control module slave station is directly connected to the external communication line.

[0007] According to the high-speed measurement and control platform architecture of the new energy vehicle power transmission system as described above, it is characterized in that the high-speed data acquisition module uses parallel acquisition and industrial field Internet Ethercat communication module to transmit the data collected on-site to the real-time control module or receive data from the real-time control module.

[0008] According to the high-speed measurement and control platform architecture of the new energy vehicle power transmission system as described above, it is characterized in that: the high-speed measurement and control software module can also include a fully automatic test process and a customized function expansion module, and automatic data analysis and testing are realized through the fully automatic test process, and the demand for expansion of collected data is realized through customized function expansion.

[0009] According to the high-speed measurement and control platform architecture of the new energy vehicle power transmission system as described above, it is characterized in that: the high-speed measurement and control software module and the main station are installed on an industrial computer, the high-speed measurement and control software module adopts an object-oriented method and a dialog box-based structure to achieve a friendly human-computer interaction interface design, and uses multiple windows to achieve test interface design with different functions.

[0010] According to the high-speed measurement and control platform architecture of the new energy vehicle power transmission system as described above, it is characterized in that: the high-speed data acquisition module includes a digital acquisition circuit, a control circuit, and a communication circuit. The digital acquisition circuit is connected to the control circuit, and the control circuit acquires the signal output by the digital acquisition circuit.

[0011] According to the high-speed measurement and control platform architecture of the new energy vehicle power transmission system as described above, the feature is that the slave module implements the EtherCAT data link layer protocol, processes the EtherCAT data frame, and provides a data interface for the slave control device.

[0012] According to the high-speed measurement and control platform architecture of the new energy vehicle power transmission system as described above, it is characterized in that: the slave station module actually provides 2 to 4 data transceiver ports, and each port can transmit and receive Ethernet data frames.

[0013] The beneficial effects of the present invention are: BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The following is a block diagram of the architecture.

[0015] Figure 2 Schematic diagram of high-speed measurement and control software module.

[0016] Figure 3 This is the working principle block diagram of the high-speed data acquisition module.

[0017] Figure 4 This is a schematic diagram of the data transmission sequence of the slave module. Implementation

[0018] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown, a high-speed measurement and control platform architecture of a new energy vehicle power transmission system includes a high-speed data acquisition module, a real-time control module and a high-speed measurement and control software module. The high-speed data acquisition module includes a high-speed parallel sampling module and an industrial field Internet Ethercat communication module. The high-speed parallel sampling module is used to collect parameters such as speed, torque, and sensor. The collected data is transmitted to the slave station through the industrial field Internet Ethercat communication module and uploaded to the master station through the slave station. The data sent by the master station is sent to the high-speed parallel sampling module through the slave station to control the actuators such as the motor; the real-time control module slave station of the present invention can be directly connected to the external communication line to realize the internal communication of the slave station. That is, the high-speed data acquisition module of the present invention uses parallel acquisition and industrial field Internet Ethercat communication modules to transmit the data collected on site to the real-time control module or receive the data of the real-time control module.

[0020] The real-time control module includes a distributed Ethercat master-slave station architecture and an FPGA real-time control module; the distributed Ethercat master-slave station architecture adopts an EtherCAT network structure in master-slave mode; the high-speed measurement and control software module uses an industrial computer and LabVIEW software, and adopts multi-threading technology and thread synchronization technology to realize a high-speed measurement and control architecture for the power transmission system of new energy vehicles.

[0021] The high-speed measurement and control software module includes modules such as signal filtering processing and multi-signal display analysis and recording. The signal filtering processing filters the data collected by the main station, and the filtered data is displayed, analyzed and recorded by multiple signals to realize the analysis and management of the collected data. The high-speed measurement and control software module can also include modules such as full-automatic test process and customized function expansion. Automatic data analysis and testing are realized through the full-automatic test process, and the demand for the expansion of collected data is realized through customized function expansion. High-speed measurement and control software module The high-speed measurement and control software module and the main station of the present invention can be installed on an industrial computer. The high-speed measurement and control software module adopts an object-oriented method and a dialog box structure to realize a friendly human-computer interaction interface design, and uses multiple windows to realize the test interface design of different functions. The measurement and control platform function matching is realized in terms of signal filtering processing, multi-signal display analysis and recording, full-automatic test process, customized function expansion, etc.

[0022] The high-speed measurement and control software module of the present invention customizes the test interface of the industrial computer according to the parameter requirements of the tested object, the test motor and the environmental chamber, transmits the control quantity through the EtherCAT bus, and collects the feedback values ​​of the tested object, the test motor and the sensor test in the environmental chamber back to the industrial computer for closed-loop control. The industrial computer of the present invention can be connected to the Ethernet, and a server end is built for data recording, aggregation and analysis, and the measurement and control mode of each terminal is selected and adjusted on the server end to form a networked distributed test bench system.

[0023] like Figure 3 As shown, the high-speed data acquisition module of the present invention includes a data acquisition circuit, a control circuit, and a communication circuit. The data acquisition circuit is connected to the control circuit. The control circuit acquires the signal output by the data acquisition circuit. The data acquisition speed can reach 250KSPS. The control circuit includes an STM32 chip, a crystal oscillator, an EEPROM chip, etc. The control circuit is connected to the communication circuit and the slave controller to realize the transmission of the signal and the connection with the external interrupt. The communication circuit includes RS485, CAN, SPI interfaces, etc. The slave module of the present invention implements the EtherCAT data link layer protocol. It processes EtherCAT data frames and provides a data interface for the slave control device. The slave module can actually provide 2 to 4 data transceiver ports, and each port can receive and send Ethernet data frames. The transmission order of the data frame inside the slave is fixed, such as Figure 4As shown. Usually, data enters the slave module from port 0, and then is transmitted in the order of port 3 → port 1 → port 0. If the slave module detects that a port has no external connection, it automatically closes the port, and the data will automatically loop back and forward to the next port. The slave module of the present invention uses MII as a physical interface.

[0024] The high-speed measurement and control software module of the present invention has the following advantages: 1) The high-speed data acquisition module is designed and developed using parallel acquisition, industrial field Internet Ethercat, FPGA and other technologies, and uses FPGA technology to achieve high-speed parallel acquisition of multi-channel data and high-speed data communication, realizing a high-speed data acquisition unit with independent intellectual property rights, and can realize the integration of related unit circuit modules. 2) The real-time control module uses industrial field Internet Ethercat, FPGA and other technologies, and adopts the master-slave mode EtherCAT network structure for development. 3) The high-speed measurement and control software module uses industrial control computers and LabVIEW software, and adopts multi-threading technology and thread synchronization technology for design and development, realizing measurement and control platform function matching in terms of signal filtering processing, multi-signal display analysis and recording, fully automatic test process, customized function expansion and other aspects.

Claims

1. A high-speed measurement and control platform architecture for a new energy vehicle powertrain system, comprising a high-speed data acquisition module, a real-time control module and a high-speed measurement and control software module, characterized in that: The high-speed data acquisition module includes a high-speed parallel sampling module and an industrial field Internet Ethercat communication module. The high-speed parallel sampling module is used to collect parameters. The collected data is transmitted to the slave station through the industrial field Internet Ethercat communication module and uploaded to the master station through the slave station. The data sent by the master station is sent to the high-speed parallel sampling module through the slave station to control the actuator; the real-time control module includes a distributed Ethercat master-slave station architecture and an FPGA real-time control module; the distributed Ethercat master-slave station architecture adopts an EtherCAT network structure in master-slave mode; the high-speed measurement and control software module includes a signal filtering processing and a multi-signal display analysis and recording module. The signal filtering processing filters the data collected by the master station, and the filtered data is displayed, analyzed and recorded by multiple signals to realize the analysis and management of the collected data. The high-speed measurement and control software module customizes the test interface of the industrial computer according to the parameter requirements of the tested device, the test motor and the environmental chamber, transmits the control quantity through the EtherCAT bus, and collects the feedback values ​​of the tested device, the test motor and the sensor test in the environmental chamber back to the industrial computer for closed-loop control.

2. The high-speed measurement and control platform architecture of a new energy vehicle power transmission system according to claim 1 is characterized in that: The real-time control module slave station is directly connected to the external communication line.

3. The high-speed measurement and control platform architecture of a new energy vehicle power transmission system according to claim 1 is characterized in that: The high-speed data acquisition module uses parallel acquisition and industrial field Internet Ethercat communication modules to transmit the data collected on site to the real-time control module or receive data from the real-time control module.

4. The high-speed measurement and control platform architecture of a new energy vehicle power transmission system according to claim 1 is characterized in that: The high-speed measurement and control software module can also include a fully automatic test process and a customized function expansion module. Automatic data analysis and testing can be achieved through the fully automatic test process, and the demand for expanded collected data can be realized through customized function expansion.

5. The high-speed measurement and control platform architecture of a new energy vehicle power transmission system according to claim 1 is characterized in that: The high-speed measurement and control software module and the main station are installed on the industrial computer. The high-speed measurement and control software module adopts an object-oriented approach and a dialog box-based structure to achieve a friendly human-computer interaction interface design, and uses multiple windows to achieve test interface design with different functions.

6. The high-speed measurement and control platform architecture of a new energy vehicle power transmission system according to claim 1 is characterized by: The high-speed data acquisition module includes a data acquisition circuit, a control circuit, and a communication circuit. The data acquisition circuit is connected to the control circuit, and the control circuit acquires the signal output by the data acquisition circuit.

7. The high-speed measurement and control platform architecture of a new energy vehicle power transmission system according to claim 1 is characterized in that: The slave module implements the EtherCAT data link layer protocol, processes the EtherCAT data frames, and provides a data interface for the slave control device.

8. The high-speed measurement and control platform architecture of a new energy vehicle power transmission system according to claim 1 is characterized in that: The slave module actually provides 2 to 4 data transceiver ports, each of which can send and receive Ethernet data frames.

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