Comprehensive test platform and method for electrical equipment for rail transit

Abstract

The invention discloses a comprehensive testing platform and method for electrical equipment for rail transit, and belongs to the technical field of communication testing, the comprehensive testing platform comprises a human-computer interaction interface and a multifunctional transmission platform, the human-computer interaction interface is connected to the multifunctional transmission platform through a CANFD bus, and the multifunctional transmission platform comprises external input and output interfaces. The multifunctional transmission platform can be connected to a to-be-tested device according to needs, tests the whole set of functions of the to-be-tested device at the same time, is provided with a high-precision sensor and an advanced test circuit, can simulate various electrical environments in a rail transit system, and can accurately test electrical devices. Through the mode, the comprehensive test platform and method for the electrical equipment for the rail transit integrate multifunctionality, intelligence and efficient data management, remarkably improve the test efficiency and accuracy, are suitable for maintenance and fault diagnosis of a rail transit system, and have wide application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of communication testing, and in particular to a comprehensive testing platform and method for electrical equipment for rail transit. Background Art

[0002] With the rapid development of the global railway industry, the rapid expansion of high-speed railways, intercity railways and urban rail transit systems (such as subways), the safety, reliability and operational efficiency of railway systems have become the focus of attention within and outside the industry. As a core component of the railway system, the performance and quality of electrical equipment are directly related to the stable operation of the entire railway system and the safe travel of passengers.

[0003] The electrical equipment in modern railway systems is highly integrated, with a wide variety of types and functions. For example, the traction system not only needs to provide stable power output, but also needs to have functions such as energy consumption management and fault diagnosis; the signal system needs to ensure safe spacing between trains and provide accurate driving instructions and dispatching information. The performance parameters, working conditions and coordination of these electrical equipment must be strictly tested and verified to ensure the safe and reliable operation of the entire railway system.

[0004] However, the traditional single test platform can usually only test a certain type or a certain type of electrical equipment, and cannot meet the test requirements of electrical equipment integrating multiple functions in modern railway systems. This results in the need to use multiple different test platforms during the actual test process, which not only has a long test cycle and high costs, but is also prone to incompatibility between test platforms or inconsistent data, which can affect the accuracy and reliability of the test results.

[0005] Therefore, there is an urgent need for a multifunctional comprehensive testing platform that can integrate multiple testing functions, has high precision, high efficiency, high reliability and good scalability. This testing platform needs to be able to adapt to the testing needs of electrical equipment integrating multiple functions in modern railway systems. Summary of the invention

[0006] The main technical problem solved by the present invention is to provide a comprehensive testing platform and method for electrical equipment for rail transit. The platform integrates an advanced human-computer interaction interface and an efficient output test bench, aiming to achieve comprehensive and accurate inspection and testing of electrical equipment in rail transit systems, ensure rail transit safety, and improve operation and maintenance efficiency.

[0007] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a comprehensive test platform for electrical equipment for rail transit, comprising: The human-computer interaction interface is equipped with a touch screen, in which the host computer software is integrated to receive user input operations and generate corresponding control instructions; A multifunctional transmission platform, including an input interface and an external input and output interface, wherein the input interface communicates with the human-computer interaction interface and is used to receive and execute the control instructions; The device under test is connected to the external input and output interface of the multifunctional transmission platform and is used to receive the test signal and feed back the test result.

[0008] In a preferred embodiment of the present invention, the host computer software includes: a display and monitoring module for real-time acquisition and display of voltage, current and switch state; a parameter configuration module for users to quickly set test parameters through a touch screen; a communication protocol library module for supporting CANopen, Modbus RTU / TCP protocols, and allowing users to customize communication message formats according to test requirements; a test report generation module for automatically generating a test report based on test data and supporting export.

[0009] In a preferred embodiment of the present invention, the multifunctional transmission platform includes: a main control MCU, connected to the human-computer interaction interface through a CAN_FD bus, for coordinating and controlling the operation of each functional module; an analog control MCU, connected to the back end of the main control MCU through an SPI bus, for controlling the analog control loop; a switch control MCU, connected to the back end of the main control MCU through an SPI bus, for controlling switch input and output channels with optional multi-level voltages; a waveform control MCU, connected to the back end of the main control MCU through an SPI bus, for controlling a waveform output loop with optional multi-level voltages; and a communication control MCU, connected to the back end of the main control MCU through an SPI bus, for controlling multiple communication loops.

[0010] In a preferred embodiment of the present invention, the analog quantity control loop includes an analog quantity output loop and an analog quantity input loop, and the analog quantity output loop includes an AD74412R chip, a triode, a MOS tube, a filter loop and a load: the input end of the AD74412R chip is connected to the analog quantity control MCU to receive the analog signal of the analog quantity control MCU and convert it into a digital signal, the triode and the MOS tube are sequentially connected to the output end of the AD74412R chip to amplify the digital signal, the filter loop is connected to the output end of the MOS tube to filter out the noise in the signal, and the load is connected to the output end of the filter loop to receive the filtered analog signal; The analog input circuit includes an AD7606 chip, a filtering circuit, a differential amplifier circuit, a sampling resistor and a sensor: the input end of the AD7606 chip is connected to the analog control MCU to receive the analog signal of the analog control MCU and convert it into a digital signal, the filtering circuit is connected to the output end of the AD7606 chip to filter out noise in the analog signal, the differential amplifier circuit is connected to the output end of the filtering circuit to amplify the filtered differential signal, the sampling resistor is connected to the output end of the differential amplifier circuit to convert the amplified differential signal into a voltage signal, and the sensor is connected to the sampling resistor to detect physical quantities and output corresponding analog signals.

[0011] In a preferred embodiment of the present invention, the multi-level voltage selectable switch output channel includes a 24 decoder, an isolation transformer circuit, relay one, relay two and relay three. The input end of the 24 decoder is connected to the switch control MCU to receive and decode the control signal. The isolation transformer circuit is connected to the output end of the 24 decoder to isolate and convert the input signal. The relay one, relay two and relay three are respectively connected to the output end of the isolation transformer circuit for outputting 12V, 24V, and 110V voltages. The relay one, relay two and relay three output the selected voltage level through the DO output end. The output ends of the relay one, relay two and relay three are also provided with a 3.3V feedback output port, which is fed back to the switch control MCU for real-time monitoring of the working status of the output channel.

[0012] In a preferred embodiment of the present invention, the waveform output circuit with selectable multi-level voltage includes an isolation optocoupler, a current limiting resistor 1, a pull-up resistor, a current limiting resistor 2, a voltage dividing resistor and a MOS tube. One side of the isolation optocoupler input end is connected in series with a pull-up resistor and then connected to the waveform generation pin of the waveform control MCU, which is used to receive the PWM signal generated by the waveform control MCU and perform electrical isolation; one side of the isolation optocoupler output end is respectively connected to one end of the voltage dividing resistor and the G end of the MOS tube, the other end of the voltage dividing resistor is connected to the S end of the MOS tube and the connection point is connected to GND, the voltage is divided and the signal is adjusted through the voltage dividing resistor, the D end of the MOS tube corresponds to the PWM output end, the PWM signal is controlled by the MOS tube to reproduce the output and the selected PWM signal is output through the PWM output end, the other side of the isolation optocoupler input end is connected in series with a current limiting resistor 1 and then connected to the power supply, and the other side of the isolation optocoupler output end is connected in series with a current limiting resistor 2 and then connected to the power supply.

[0013] In a preferred embodiment of the present invention, the multiple communication circuits include a CAN_FD communication circuit, an RS485 communication circuit or an ETH communication circuit.

[0014] In a preferred embodiment of the present invention, the CAN_FD communication circuit includes a CAN controller, a peripheral circuit, a CAN transceiver and an interface circuit. The input end of the CAN controller is connected to the communication control MCU via an SPI bus to realize communication control of the CAN_FD protocol; the peripheral circuit is connected to the output end of the CAN controller, the CAN transceiver is connected to the output end of the peripheral circuit to convert the CAN controller signal into a CAN bus signal, and the interface circuit is connected to the output end of the CAN transceiver to realize the connection between the peripheral circuit and the device under test, and transmit the CAN bus signal to the device under test.

[0015] In a preferred embodiment of the present invention, the multifunctional transmission platform further includes a power conversion module to convert the input voltage into a required output voltage, and the power conversion module includes: DC12V- DC5V voltage conversion circuit, used to convert 12V DC voltage into 5V DC voltage; DC24V-DC12V voltage conversion circuit, used to convert 24V DC voltage into 12V DC voltage; DC36V-DC24V voltage conversion circuit, used to convert 36V DC voltage into 24V DC voltage; DC48V-DC36V voltage conversion circuit, used to convert 48V DC voltage into 36V DC voltage; DC110V-DC48V voltage conversion circuit, used to convert 110V DC voltage into 48V DC voltage; AC220V-DC110V voltage conversion circuit is used to convert 220V AC voltage into 110V DC voltage.

[0016] The beneficial effects of the present invention are: a human-computer interaction interface designed with a high-definition touch screen is easy and intuitive to operate, and users can easily select test items, set test parameters, and view test results in real time through the interface; a multifunctional output test platform is adopted, equipped with high-precision sensors and advanced test circuits, which can simulate various electrical environments in rail transit systems and perform precise tests on electrical equipment. The test bench also has an automatic calibration function to ensure the accuracy and reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1It is a structural schematic diagram of a preferred embodiment of the comprehensive test platform for rail transit electrical equipment of the present invention; Figure 2 It is a structural schematic diagram of the analog output circuit of the present invention; Figure 3 It is a structural schematic diagram of the analog input circuit of the present invention; Figure 4 It is a structural schematic diagram of a switch output channel with multi-level voltage selectability of the present invention; Figure 5 It is a structural schematic diagram of a waveform output circuit with multi-level voltage selectability of the present invention; Figure 6 It is a structural schematic diagram of the CAN_FD communication circuit of the present invention; DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, the present invention relates to a comprehensive test platform for electrical equipment for rail transit, which includes a human-computer interaction interface and a multi-functional transmission platform. The human-computer interaction interface is connected to the multi-functional transmission platform through a CAN_FD bus. The multi-functional transmission platform includes an external input and output interface, which can be connected to a device to be tested as needed, and a full set of functions of the device to be tested can be tested at the same time.

[0021] The first is the human-computer interaction interface, which is equipped with a touch screen. The touch screen integrates the host computer software. The host computer software is used to receive user input operations and generate corresponding control instructions. At the same time, it realizes the control of the multi-functional transmission platform and the management of test data. The human-computer interaction interface interacts with the user through the touch screen to complete the testing, monitoring and data management of the equipment under test.

[0022] The host computer software includes a display and monitoring module, a parameter configuration module, a communication protocol library module and a test report generation module. In detail, The display and monitoring module is used to collect and display the voltage, current and switch status in real time. The display and monitoring module receives the test data from the multi-functional transmission platform and displays it on the touch screen in an intuitive way, so that users can monitor the status of the device under test in real time.

[0023] The parameter configuration module allows users to quickly set test parameters, such as voltage and current setting values, test mode, etc., through the touch display screen, and send the configuration parameters to the multi-function transmission platform through the CAN_FD bus.

[0024] The communication protocol library module has built-in CANopen and Modbus RTU / TCP protocol libraries to support CANopen and ModbusRTU / TCP protocols and realize communication with the multi-function platform. Users can select the corresponding protocol library according to the communication protocol of the device under test to ensure the compatibility and stability of data transmission; at the same time, users can customize the communication message format according to test requirements to meet the communication requirements in different test scenarios.

[0025] The test report generation module is used to automatically generate standardized test reports based on the data records and test results during the test process, and supports export, making it easier for users to save and analyze test data.

[0026] The above modules jointly realize the function of the human-computer interaction interface, which interacts with the user through the touch screen, controls the multi-functional transmission platform, and completes the testing, monitoring and data management of the equipment under test.

[0027] The second is a multifunctional transmission platform, which includes an input interface and an external input and output interface, wherein the input interface communicates with the human-computer interaction interface to receive and execute the control instructions, and the external input and output interface is connected to the device under test, receives the test signal through the device under test and feeds back the test results.

[0028] The core of the multifunctional transmission platform is the main control MCU, which is connected to the back-end analog control MCU, switch control MCU, waveform control MCU and communication control MCU through the SPI bus. These control MCUs are responsible for different control tasks: The analog quantity control MCU is connected to the analog quantity control loop and is responsible for controlling the input and output of analog signals; the switch quantity control MCU is connected to the switch quantity input and output channels with multi-level voltage options and is responsible for controlling the switch signals; the waveform control MCU is connected to the waveform output loop with multi-level voltage options and is responsible for generating and outputting waveform signals; the communication control MCU is connected to a variety of communication loops and is responsible for processing communication protocols and data transmission.

[0029] Among them, the analog control loop includes an analog output loop and an analog input loop: the analog output loop is based on AD74412R, connected to the front-end analog control MCU, and builds corresponding peripheral circuits and filtering loops, which can effectively output the required analog quantity to the corresponding load end. The AD74412R chip can convert digital signals into 4-20mA current output or 0~10V voltage output, which is used to drive current type loads or voltage type loads.

[0030] The analog input circuit is based on AD7606 and is connected to the front-end analog control MCU. It is equipped with a filtering circuit, a differential amplifier circuit, and a standard sampling resistor, which can collect various numerical changes of the corresponding sensor in real time.

[0031] like Figure 2 As shown, in a specific implementation, the analog output circuit includes an AD74412R chip, a triode, a MOS tube, a filter circuit and a load.

[0032] The input end of the AD74412R chip is connected to the analog control MCU to receive the analog signal of the analog control MCU and convert it into a digital signal. The AD74412R chip supports multiple output modes, including 4-20mA current output and 0-10V voltage output, and can drive different types of loads.

[0033] The triode and the MOS tube are sequentially connected to the output end of the AD74412R chip to amplify the digital signal to meet the load's requirements on signal amplitude and driving capability.

[0034] The filter circuit is connected to the output end of the MOS tube to filter out the noise in the signal and ensure the purity of the output signal. The output signal of the filter circuit is a processed analog signal with a significantly reduced noise level, which is suitable for directly driving the load.

[0035] The load is connected to the output end of the filter loop to receive the filtered analog signal. In practical applications, overcurrent protection and overvoltage protection circuits can be added to the load end to prevent damage to the load.

[0036] like Figure 3 As shown, in a specific implementation, the analog input circuit includes an AD7606 chip, a filter circuit, a differential amplifier circuit, a sampling resistor and a sensor.

[0037] The AD7606 chip supports multi-channel synchronous sampling and can collect multiple analog signals in real time. The input end of the AD7606 chip is connected to the analog control MCU to receive the analog signal of the analog control MCU and convert it into a digital signal. The filter circuit is connected to the output end of the AD7606 chip to filter out the noise in the analog signal and ensure the accuracy of signal acquisition. The output signal of the filter circuit is an analog signal that has been preliminarily processed, and its noise level is significantly reduced, which is suitable for subsequent differential amplification processing.

[0038] The differential amplifier circuit is connected to the output end of the filter circuit to amplify the filtered differential signal, which can effectively improve the resolution and anti-interference ability of the signal.

[0039] The sampling resistor is connected to the output end of the differential amplifier circuit to convert the amplified differential signal into a voltage signal. The sensor is connected to the sampling resistor to detect physical quantities and output corresponding analog signals.

[0040] Among them, the resistance value of the sampling resistor is selected according to the output characteristics of the sensor and the input range of the AD7606 chip. After the output signal of the sensor is converted into a voltage signal through the sampling resistor, it passes through the differential amplifier circuit, the filter circuit and the AD7606 chip in sequence, and is finally converted into a digital signal and transmitted to the analog control MCU.

[0041] like Figure 4 As shown, in a specific implementation, one of the multi-level voltage selectable switch output channels includes a 24 decoder, an isolation transformer circuit, relay one, relay two and relay three.

[0042] The 24 decoder is the core component of the switch output channel, responsible for decoding the control signal of the switch control MCU into specific output instructions.

[0043] The input end of the 24 decoder is connected to the switch control MCU to receive and decode the control signal. The output end of the 24 decoder is connected to the isolation transformer circuit for electrically isolating and level converting the decoded signal. The output signal of the isolation transformer circuit is an isolated and conditioned control signal that can safely drive subsequent relays.

[0044] The relay 1, relay 2 and relay 3 are respectively connected to the output end of the isolation transformer circuit, and the specific function of each relay is: relay 1 is used to output 12V voltage, which is suitable for low voltage loads; relay 2 is used to output 24V voltage, which is suitable for medium voltage loads; relay 3 is used to output 110V voltage, which is suitable for high voltage loads.

[0045] The relay 1, relay 2 and relay 3 output the selected voltage level through the DO output terminal, realizing multi-level voltage optional switching.

[0046] The output ends of the relays 1, 2 and 3 are also provided with 3.3V feedback output ports for real-time monitoring of the working status of the output channels. The feedback signals are transmitted to the switch quantity control MCU through the signal lines for real-time monitoring of the working status of the output channels.

[0047] like Figure 5 As shown, in a specific embodiment, a waveform output circuit with multi-level voltage selectable includes: an isolation optocoupler, a current limiting resistor 1, a pull-up resistor, a current limiting resistor 2, a voltage dividing resistor and a MOS tube, which can achieve 24V, 36V, and 48V voltage waveform output.

[0048] The isolation optocoupler is the core component of the waveform output circuit, which is responsible for electrically isolating the PWM signal generated by the waveform control MCU to prevent the high voltage circuit from interfering with the control circuit.

[0049] One side of the isolation optocoupler input end is connected in series with a pull-up resistor and then connected to the waveform generation pin of the waveform control MCU, so as to receive the PWM signal generated by the waveform control MCU and perform electrical isolation transmission; one side of the isolation optocoupler output end is respectively connected to one end of the voltage divider resistor and the G end of the MOS tube, so as to drive the PWM signal output of the high voltage loop.

[0050] The other side of the isolation optocoupler input end is connected in series with a current limiting resistor 1 and then connected to a power supply, and the other side of the isolation optocoupler output end is connected in series with a current limiting resistor 2 and then connected to a power supply.

[0051] The other end of the voltage-dividing resistor is connected to the S end of the MOS tube and the connection point is connected to GND. The voltage-dividing resistor is used to divide the voltage and adjust the signal to ensure that the MOS tube operates within a suitable gate voltage range.

[0052] The D end of the MOS tube corresponds to the PWM output end, and the reproducing output of the PWM signal is controlled by the MOS tube and the selected PWM signal is output through the PWM output end.

[0053] By adjusting the resistance of the voltage divider resistor and the working state of the MOS tube, PWM waveform output of multiple voltages such as 24V, 36V, and 48V can be achieved.

[0054] The multiple communication circuits include: CAN_FD communication circuit, RS485 communication circuit, and ETH communication circuit.

[0055] Take CAN_FD communication as an example. Figure 6 As shown, in a specific embodiment, the CAN_FD communication loop is provided with a CAN controller, which communicates with the communication control MCU through the SPI bus, and the back end is provided with a corresponding peripheral circuit connector CAN transceiver, which is then connected to the device under test through the peripheral interface circuit to meet the CAN_FD communication requirements.

[0056] The CAN controller is the core of the CAN_FD communication loop and is responsible for implementing the communication control of the CAN_FD protocol. Its input end is connected to the communication control MCU through the SPI bus, receives instructions and data from the MCU, and executes the encapsulation and parsing of the CAN_FD protocol. The output end of the CAN controller is connected to the peripheral circuit to transmit the processed signal to the CAN transceiver.

[0057] The CAN transceiver is connected to the output end of the peripheral circuit to convert the CAN controller signal into a CAN bus signal, and the output end of the CAN transceiver is connected to the device under test through an interface circuit to realize the transmission of the CAN bus signal. Among them, the interface circuit is connected to the output end of the CAN transceiver to realize the connection between the peripheral circuit and the device under test.

[0058] On the basis of the above module structure, the multifunctional transmission platform further has a power conversion module to convert different input voltages into required output voltages.

[0059] The power conversion module includes a multi-level voltage conversion circuit that meets rail transit standards, including: DC12V-DC5V voltage conversion circuit, which is used to convert 12V DC voltage into 5V DC voltage, suitable for powering low-power devices; DC24V-DC12V voltage conversion circuit, which is used to convert 24V DC voltage into 12V DC voltage and is suitable for powering medium-power equipment; DC36V-DC24V voltage conversion circuit, which is used to convert 36V DC voltage into 24V DC voltage, suitable for powering high-power equipment; DC48V-DC36V voltage conversion circuit, which is used to convert 48V DC voltage into 36V DC voltage, suitable for power supply of high voltage equipment; DC110V-DC48V voltage conversion circuit, which is used to convert 110V DC voltage into 48V DC voltage, suitable for power supply of high voltage and high power equipment; AC220V-DC110V voltage conversion circuit, which is used to convert 220V AC voltage into 110V DC voltage, and is suitable for AC power supply.

[0060] Based on the above test platform, the present invention also relates to a comprehensive test method for rail transit electrical equipment, comprising the following steps: S1. Classify the devices under test according to their functions and application scenarios, determine the test tasks based on the types of devices under test and test requirements, analyze the failure modes and performance indicators of the devices under test, and provide data support for the determination of test tasks.

[0061] S2. Based on the type of test task, select the corresponding control module and configure the communication link between the multifunctional transmission platform and the human-computer interaction interface and the device under test.

[0062] S3. Set the test parameters through the parameter configuration module of the human-computer interaction interface, send control signals to the device under test through the multi-functional transmission platform, and collect feedback signals from the device under test in real time. Exchange data with the device under test through the corresponding control loop, and monitor the test parameters of the control loop in real time.

[0063] S4, store test data in real time, display test data in real time through human-computer interaction interface, and conduct preliminary analysis; S5. Through the upper computer software of the human-computer interaction interface, a test report including test parameters, test process and test results is automatically generated.

[0064] Taking the smart dimmer test as an example, the specific test steps are: S1. The intelligent dimmer involves two RS485 communications, two analog input channels, two active 110V DI circuits and two active 110V DO circuits.

[0065] S2, connect the two RS485 communication interfaces of the intelligent dimmer to the RS485 communication circuit of the multi-functional transmission platform. Connect the two analog input channels of the intelligent dimmer to the analog output circuit of the multi-functional transmission platform. Connect the two active 110V DI loops and two active 110V DO loops of the smart dimmer to the switch output channels of the multi-functional transmission platform respectively; The power conversion module of the multi-functional transmission platform provides the required 110V DC power to the smart dimmer; Through the communication protocol library module of the human-computer interaction interface, select the RS485 communication protocol, configure the communication parameters, establish a communication link between the host computer, the multi-functional transmission platform and the intelligent dimmer, and ensure normal communication.

[0066] S3, Analog output configuration and test: Through the parameter configuration module of the human-computer interaction interface, set the output parameters of the analog output channel, configure the output form of the AD74412R chip, ensure that the correct two-way 4-20mA analog input signal is provided, receive the analog data converted by the intelligent dimmer through the RS485 channel, transmit the collected analog data to the host computer through the CAN_FD bus, and display it in real time in the display and monitoring module of the human-computer interaction interface; Switching input and output configuration and testing: Configure the input signal type of the two active 110V DI loops, configure the output mode of the two active 110V DO loops, and set the voltage level of the output signal to 110V. The MCU is controlled by the switch quantity to send test signals to the two active 110V DI circuits of the smart dimmer, monitor the response of the smart dimmer to the input signal, and feed back to the multi-functional transmission platform through the switch quantity output channel. Send control signals to the two active 110V DO circuits of the smart dimmer through the switch output circuit of the multi-function transmission platform to verify its output function; RS485 communication configuration and test: Configure the test parameters of two RS485 communications, load the Modbus RTU protocol library through the communication protocol library module, Through the RS485 communication loop, the test command in the Modbus RTU protocol format is sent to the smart dimmer, the response data of the smart dimmer is received, and the display and monitoring module of the human-computer interaction interface is displayed in real time to verify the correctness and real-time nature of the communication data and ensure the stability of the two-way RS485 communication.

[0067] S4. Data storage and analysis: The analog data, switch data and communication data collected during the test are stored in real time in the database of the host computer. The test data are analyzed through the display and monitoring module of the human-computer interaction interface, such as the fluctuation range of the analog signal, the response time of the switch signal, the bit error rate of the communication data, etc. The data analysis algorithm is used to evaluate the performance indicators of the smart dimmer.

[0068] S5. Test report generation: Through the test report generation module of the host computer software, a test report containing test parameter configuration information, analog input and output data, switch input and output data, communication data, etc. is automatically generated.

[0069] By using the comprehensive test platform for rail transit electrical equipment of the present invention, all functions of the intelligent dimmer can be completely and effectively tested, and full-stage monitoring from the upper computer to the intelligent dimmer and finally to the lower computer and sub-equipment can be realized, thereby effectively completing the comprehensive test of the equipment.

[0070] The beneficial effects of the comprehensive test platform and method for rail transit electrical equipment of the present invention are: Versatility: The platform supports testing of various electrical equipment in rail transit systems, including but not limited to intelligent dimmers, auxiliary diagnostic units, and logic control units. By selecting different test modules and parameter settings, users can easily complete various test tasks; Intelligent testing: The platform has built-in intelligent testing algorithms that can automatically adjust test parameters and test processes according to different test items. It can also intelligently analyze test results, provide fault warnings and diagnostic suggestions, and help users quickly locate problems and take appropriate solutions. Data management and report generation: The platform has comprehensive data management functions and can store a large amount of test data and historical records. Users can query and export these data at any time for further analysis and processing. In addition, the platform also supports automatic generation of test reports, which is convenient for users to output and report test results.

[0071] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A comprehensive test platform for electrical equipment for rail transit, characterized in that: include: The human-computer interaction interface is equipped with a touch screen, in which the host computer software is integrated to receive user input operations and generate corresponding control instructions; A multifunctional transmission platform, including an input interface and an external input and output interface, wherein the input interface communicates with the human-computer interaction interface and is used to receive and execute the control instructions; The device under test is connected to the external input and output interface of the multifunctional transmission platform and is used to receive the test signal and feed back the test result.

2. The comprehensive test platform for rail transit electrical equipment according to claim 1 is characterized in that: The host computer software includes: Display and monitoring module, used to collect and display voltage, current and switch status in real time; Parameter configuration module, used by users to quickly set test parameters through the touch screen; Communication protocol library module, used to support CANopen, Modbus RTU / TCP protocols, and allow users to customize the communication message format according to test requirements; The test report generation module is used to automatically generate test reports based on test data and supports export.

3. The comprehensive test platform for rail transit electrical equipment according to claim 1 is characterized in that: The multifunctional transmission platform comprises: The main control MCU is connected to the human-machine interface through the CAN_FD bus and is used to coordinate and control the operation of each functional module; The analog control MCU is connected to the back end of the main control MCU through the SPI bus and is used to control the analog control loop; The switch quantity control MCU is connected to the back end of the main control MCU through the SPI bus and is used to control the switch quantity input and output channels with multi-level voltage options; The waveform control MCU is connected to the back end of the main control MCU through the SPI bus and is used to control the waveform output circuit with multi-level voltage options; The communication control MCU is connected to the back end of the main control MCU via the SPI bus and is used to control various communication circuits.

4. The comprehensive test platform for rail transit electrical equipment according to claim 3 is characterized in that: The analog control loop includes an analog output loop and an analog input loop. The analog output circuit includes an AD74412R chip, a triode, a MOS tube, a filter circuit and a load: the input end of the AD74412R chip is connected to the analog control MCU to receive the analog signal of the analog control MCU and convert it into a digital signal. The triode and the MOS tube are sequentially connected to the output end of the AD74412R chip to amplify the digital signal, the filter circuit is connected to the output end of the MOS tube to filter out the noise in the signal, and the load is connected to the output end of the filter circuit to receive the filtered analog signal; The analog input circuit includes an AD7606 chip, a filter circuit, a differential amplifier circuit, a sampling resistor and a sensor: the input end of the AD7606 chip is connected to the analog control MCU to receive the analog signal of the analog control MCU and convert it into a digital signal. The filter circuit is connected to the output end of the AD7606 chip to filter out noise in the analog signal, the differential amplifier circuit is connected to the output end of the filter circuit to amplify the filtered differential signal, the sampling resistor is connected to the output end of the differential amplifier circuit to convert the amplified differential signal into a voltage signal, and the sensor is connected to the sampling resistor to detect physical quantities and output corresponding analog signals.

5. The comprehensive test platform for rail transit electrical equipment according to claim 3 is characterized in that: The multi-level voltage selectable switch output channel includes a 24 decoder, an isolation transformer circuit, a relay 1, a relay 2 and a relay 3. The input end of the 24 decoder is connected to the switch control MCU to receive the control signal and decode it. The isolation transformer circuit is connected to the output end of the 24 decoder to isolate and convert the input signal. The relay 1, relay 2 and relay 3 are respectively connected to the output end of the isolation transformer circuit to output 12V, 24V, and 110V voltages. The relay 1, relay 2 and relay 3 output the selected voltage level through the DO output end. The output ends of the relay 1, relay 2 and relay 3 are also provided with a 3.3V feedback output port, which is fed back to the switch quantity control MCU for real-time monitoring of the working status of the output channel.

6. The comprehensive test platform for rail transit electrical equipment according to claim 3 is characterized in that: The waveform output circuit with multi-level voltage selectability includes an isolation optocoupler, a current limiting resistor 1, a pull-up resistor, a current limiting resistor 2, a voltage dividing resistor and a MOS tube. One side of the isolation optocoupler input end is connected in series with a pull-up resistor and then connected to the waveform generation pin of the waveform control MCU, so as to receive the PWM signal generated by the waveform control MCU and perform electrical isolation; One side of the output end of the isolation optocoupler is respectively connected to one end of the voltage-dividing resistor and the G end of the MOS tube, the other end of the voltage-dividing resistor is connected to the S end of the MOS tube and the connection point is connected to GND, the voltage-dividing resistor is used to divide the voltage and adjust the signal, the D end of the MOS tube corresponds to the PWM output end, the MOS tube controls the recurrence output of the PWM signal and outputs the selected PWM signal through the PWM output end, The other side of the isolation optocoupler input end is connected in series with a current limiting resistor 1 and then connected to a power supply, and the other side of the isolation optocoupler output end is connected in series with a current limiting resistor 2 and then connected to a power supply.

7. The comprehensive test platform for rail transit electrical equipment according to claim 3 is characterized in that: The multiple communication circuits include a CAN_FD communication circuit, an RS485 communication circuit or an ETH communication circuit.

8. The comprehensive test platform for rail transit electrical equipment according to claim 7 is characterized in that: The CAN_FD communication circuit includes a CAN controller, a peripheral circuit, a CAN transceiver and an interface circuit. The CAN controller input end is connected to the communication control MCU via the SPI bus to implement communication control of the CAN_FD protocol; The peripheral circuit is connected to the output end of the CAN controller, and the CAN transceiver is connected to the output end of the peripheral circuit to convert the CAN controller signal into a CAN bus signal. The interface circuit is connected to the output end of the CAN transceiver to achieve the connection between the peripheral circuit and the device under test, and transmit the CAN bus signal to the device under test.

9. The comprehensive test platform for rail transit electrical equipment according to any one of claims 3 to 8, characterized in that: The multifunctional transmission platform further includes a power conversion module to convert an input voltage into a required output voltage, and the power conversion module includes: DC12V- DC5V voltage conversion circuit, used to convert 12V DC voltage into 5V DC voltage; DC24V-DC12V voltage conversion circuit, used to convert 24V DC voltage into 12V DC voltage; DC36V-DC24V voltage conversion circuit, used to convert 36V DC voltage into 24V DC voltage; DC48V-DC36V voltage conversion circuit, used to convert 48V DC voltage into 36V DC voltage; DC110V-DC48V voltage conversion circuit, used to convert 110V DC voltage into 48V DC voltage; AC220V-DC110V voltage conversion circuit is used to convert 220V AC voltage into 110V DC voltage.

10. A comprehensive testing method for electrical equipment for rail transit, characterized in that: The steps include: S1. Determine the test task based on the type of device under test and the test requirements; S2. Based on the type of test task, select the corresponding control module and establish a communication link between the multifunctional transmission platform, the human-computer interaction interface and the device under test; S3. Configure the test parameters through the human-computer interaction interface based on the information of the device under test, send control signals to the device under test through the multi-functional transmission platform, collect feedback signals from the device under test in real time, exchange data with the device under test through the corresponding control loop, and monitor the test parameters of the control loop; S4, store test data in real time, and display and analyze it through the human-computer interaction interface; S5. Through the upper computer software of the human-computer interaction interface, a test report including test parameters, test process and test results is automatically generated.

Images