Train operation scene test platform based on unmanned driving mode

Abstract

The utility model discloses a train operation scene test platform based on an unmanned driving mode, and relates to the technical field of train data simulation. Comprising a temperature detection simulation module which is composed of an integrated circuit temperature sensor, a diode and a first addition arithmetic unit and is used for detecting the surface temperature of the train diesel engine through communication of the sensor and the diode; the train running speed simulation module comprises a tachometer conversion board and a second addition arithmetic unit, and the voltage signal output by the industrial personal computer is adapted to the display equipment through the conversion board to simulate the train running speed; the disturbance signal simulation module comprises a random number generator chip and an operational amplifier and is used for simulating interference signals in the train running process and inputting the interference signals to the temperature and speed module; and the monitoring display module is composed of a microcontroller and train data display equipment, receives and displays the analog data and provides monitoring of the running state of the train. The platform can accurately simulate key parameters in the operation process of the unmanned train.

Description

TECHNICAL FIELD

[0001] The utility model relates to train data simulation technical field, concretely is a kind of train operation scene test platform based on unmanned mode. BACKGROUND

[0002] With the rapid development of artificial intelligence and automation technology, unmanned driving technology gradually becomes an important research direction in rail transit field, and unmanned train is gradually popularized in urban rail transit, freight railway and high-speed railway field with the advantages of high efficiency, energy saving, stability and safety. However, the operation of unmanned train is different from traditional manned train, and it relies on complex automation control system to complete the tasks such as train start, acceleration, deceleration, parking and environment monitoring. The operation of these systems needs to maintain high reliability, high accuracy and high stability in complex operation environment. However, train is inevitably affected by a series of complex factors in actual operation, including motor temperature change, train motor speed fluctuation, external electromagnetic interference and mechanical vibration, etc., which may have adverse effects on the control system of unmanned train and operation safety.

[0003] Traditional testing methods are often difficult to comprehensively and effectively simulate the real running scene of unmanned train. On the one hand, most of the existing simulation platforms have single function, for example, only one parameter (such as speed or temperature) of train can be simulated, and multiple running parameters cannot be simulated jointly, which leads to the difficulty of comprehensive reflection of actual running characteristics of train in simulation results. On the other hand, part of the test platform can only carry out static test, and cannot dynamically simulate the random disturbance signal received during train running process, which greatly reduces the accuracy and authenticity of test results. In addition, the output data of test platform often needs to be recorded and processed manually, which lacks real-time and intuitiveness, further limiting the test efficiency and visualization level of test results. The above problems are particularly critical in the research and verification process of unmanned train, if the automatic control system of train cannot be fully verified and optimized through high-precision and high-reproduction test platform, hidden trouble may occur in actual train operation, which affects the operation safety.

[0004] In view of the above technical problems, a test platform capable of comprehensively simulating the running scene of unmanned train is needed, which can realize the all-round evaluation and monitoring of train running state through the simulation of key running parameters (such as temperature, speed) of train and interference signal. At the same time, the test platform also needs to have the functions of data real-time display and storage, so as to facilitate the analysis and optimization of test process, so as to provide more reliable and efficient technical support for the research and development of unmanned train.

[0005] The above information disclosed in the BACKGROUND section merely to provide background information regarding the present disclosure, and as such it can include information that is not prior art to the present disclosure. Utility Model Content

[0006] The utility model discloses a train operation scene test platform based on unmanned mode, to solve the problem of above -mentioned background technology.

[0007] To achieve the above -mentioned purpose, the utility model provides the following technical scheme:

[0008] A train operation scene test platform based on unmanned mode, specifically includes:

[0009] Temperature simulation module, temperature simulation module includes temperature sensor unit and heating unit, temperature sensor unit and microcontroller module electric connection are used to gather the surface temperature of heating unit as the analog temperature data of train operation, and send to microcontroller module;

[0010] Speed simulation module, the speed simulation module includes DC motor and encoder unit, the encoder unit and the rotating shaft of DC motor coaxial connection, the encoder unit and microcontroller module electric connection are used to detect the rotating speed of DC motor as the analog rotating speed data of train, and send to microcontroller module;

[0011] Disturbance simulation module, the disturbance simulation module and the output of temperature sensor unit, encoder unit electric connection are used to produce disturbance signal, for simulating the interference signal of temperature measurement and rotation measurement in the process of train operation;

[0012] Microcontroller module, the microcontroller module and communication module electric connection are used to receive temperature data and rotating speed data after superimposed interference signal, constitute temperature simulation signal and rotating speed simulation signal, and through serial port delivery to communication module;

[0013] Communication module, the communication module and train's industrial computer electric connection are used to deliver temperature simulation signal and rotating speed simulation signal to train's industrial computer.

[0014] Further, the temperature sensor unit includes a temperature sensor and a first adder, the temperature sensor, the output of the disturbance simulation module are electrically connected with the input of the first adder, the output of the first adder is electrically connected with the microcontroller module, the temperature sensor is used to collect the surface temperature of the heating unit and convert the temperature data into an analog quantity, the disturbance simulation module is used to generate a disturbance signal, and the first adder is used to superimpose the disturbance signal generated by the disturbance simulation module and the temperature analog quantity generated by the temperature sensor to simulate the temperature data under the train operation condition.

[0015] Further, the speed simulation module further comprises a second adder, the encoder output is electrically connected with the input of the second adder, the output of the second adder is electrically connected with the microcontroller module, and the encoder is used for collecting the rotating speed simulation quantity of the DC motor, and the second adder is used for superimposing the disturbance signal generated by the disturbance simulation module and the rotating speed simulation quantity output by the encoder to simulate the rotating speed data in the running condition of the train.

[0016] Further, the disturbance simulation module comprises a random number generator chip and a digital-to-analog converter, the random number generator chip is used for generating digital random numbers, the input of the digital-to-analog converter is electrically connected with the output of the random number generator chip, the digital-to-analog converter is used for converting the digital random data output by the random number generator chip into a random fluctuation voltage signal, the random fluctuation voltage signal is used for simulating the disturbance signal in the running process of the train, and the output of the digital-to-analog converter serves as the output of the disturbance simulation module.

[0017] Further, the communication module comprises a signal input port and a communication interface, the signal input port is electrically connected with the microcontroller model, and the communication interface is electrically connected with the industrial computer, the communication module is used for transmitting the data output by the microcontroller to the industrial computer.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] Through the cooperative design of the temperature simulation module, the speed simulation module, the disturbance simulation module, the microcontroller module and the communication module, not only the surface temperature and the running speed of the train diesel engine can be accurately simulated, but also the interference signal in the running process of the train can be effectively simulated through the disturbance simulation module, so that the real running environment is approached more. Meanwhile, the communication module can record and transmit the related data in real time, and the test personnel can analyze and evaluate the simulation running data of the train. The test platform solves the problem that the train running scene is difficult to simulate in multiple dimensions in the prior art, significantly improves the comprehensiveness and accuracy of the test, and provides important technical support for the safety design and operation of the unmanned train. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a whole module structure schematic view of the utility model;

[0021] Fig. 2 It is a whole circuit structure schematic view of the utility model;

[0022] Fig. 3 It is an interference signal generation module schematic view of the utility model. CONCRETE IMPLEMENTATION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further explained in detail in combination with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood as the usual meaning by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Embodiment:

[0026] Please refer to Figs. 1-3 The utility model provides a technical scheme:

[0027] A train operation scene test platform based on unmanned mode, specifically comprising:

[0028] The temperature simulation module comprises a temperature sensor unit and a heating unit, the temperature sensor unit and the microcontroller module are electrically connected, and the surface temperature of the heating unit is collected as simulation temperature data of train operation and is sent to the microcontroller module.

[0029] The temperature sensor unit comprises a temperature sensor and a first adder, the output ends of the temperature sensor and the disturbance simulation module are electrically connected with the input end of the first adder, the output end of the first adder is electrically connected with the microcontroller module, the temperature sensor is used for collecting the surface temperature of the heating unit and converting the temperature data into an analog quantity, the disturbance simulation module is used for generating a disturbance signal, and the first adder is used for superimposing the disturbance signal generated by the disturbance simulation module and the temperature analog quantity generated by the temperature sensor, simulating the temperature data collected under the real running condition of the train. The temperature data collected under the real running condition of the simulation train specifically comprises the surface temperature of the train diesel engine.

[0030] The temperature sensor unit is specifically an IC Temperature Sensor, which is an electronic device that integrates temperature detection and signal processing on a single chip. They usually have an analog output that can provide accurate temperature measurements and are easy to interface with microcontrollers or other digital systems. Analog output temperature sensors output an analog voltage signal proportional to temperature, which can be directly connected to an analog input port for measurement. They are commonly used in portable devices and electric vehicles to monitor battery temperature and prevent overheating or overcooling, such as the LM35, a common analog output temperature sensor that outputs a voltage proportional to Celsius temperature, with 10mV per degree Celsius.

[0031] The ground terminal of the IC Temperature Sensor is electrically connected to the positive terminal of the diode, one of the main functions of which is to prevent reverse polarity of the power supply. When the power supply of the LM35 is connected incorrectly, the diode can limit the direction of current flow, preventing current from flowing back into the sensor and protecting the sensor from damage.

[0032] In this case, the diode is usually connected in series with the ground pin. When the power supply is connected in reverse, the diode blocks current due to reverse bias, providing protection. In complex electromagnetic environments such as railway control systems or industrial scenarios, the ground line may be affected by external electromagnetic interference. The diode can reduce the impact of electromagnetic interference signals on the LM35 to some extent, providing a purer reference ground potential for the sensor.

[0033] The temperature detection analog module includes an IC Temperature Sensor, which detects the surface temperature of the train diesel engine and outputs a corresponding voltage signal at the output terminal. The output terminal of the IC Temperature Sensor is electrically connected to one input terminal of the first adder. The first adder has two input terminals, and the first adder is composed of resistors R1, R2, R3, R4, R5, and R6 and an operational amplifier A1.

[0034] The heating unit is used to simulate the heating state of the diesel engine during train operation, and the following options can be selected: electric heating wire: a simple coil heater suitable for rapid heating; thermocouple: used for precise temperature control, but usually combined with other heating units.

[0035] The driving unit is responsible for controlling the temperature change of the heating unit, and the following options can be selected: MOSFET: used to control current, adjust the power of the heating unit through PWM signals, suitable for fast response; relay: used for control of high-power heating units, suitable for simple on-off control.

[0036] The speed simulation module comprises a direct current motor and an encoder unit, the encoder unit is coaxially connected with the rotating shaft of the direct current motor, and the encoder unit and the microcontroller module are electrically connected to detect the rotating speed of the direct current motor as the simulation rotating speed data of the train and send the simulation rotating speed data to the microcontroller module.

[0037] The speed simulation module further comprises a second adder, the encoder output end is electrically connected with the second adder input end, the output end of the second adder is electrically connected with the microcontroller module, the encoder is used to collect the rotating speed simulation of the direct current motor, the second adder is used to superimpose the disturbance signal generated by the disturbance simulation module and the rotating speed simulation collected by the encoder under the real running condition of the train, wherein the direct current motor and the heating unit can be connected with an external driving unit, and the external driving unit is used to control the direct current motor to work.

[0038] The H bridge is the most common direct current motor driving circuit, which can control the forward and reverse rotation of the motor. The H bridge can be constructed by using transistors, MOSFETs or IGBTs, and the like, and specifically, TB6612FNG is a low-power double H bridge driver, which is suitable for controlling small direct current motors, and L293D is another common H bridge driver, which is suitable for small power direct current motors.

[0039] The encoder is mainly divided into two types: incremental encoder and absolute encoder. For speed measurement, the incremental encoder is more commonly used, and the incremental encoder generates a pulse signal by detecting the rotation of the rotating shaft. A certain number of pulses are sent out every turn or at a certain angle, and the frequency of the pulses is proportional to the rotating speed. In practical applications, some common incremental encoder models can be selected, such as the following KY-040 rotary encoder: suitable for small projects, easy to use, and output pulse signals; HEDS-9000 series: high precision, suitable for applications requiring higher resolution. The simulation rotating speed signal output by the encoder is input as the input of the second adder through the input end Pin, and the signal superposition is completed.

[0040] The disturbance simulation module is electrically connected with the temperature sensor unit and the rotating speed meter conversion plate unit, and is used to generate a disturbance signal for simulating the interference signal for temperature measurement and rotating speed measurement during the running of the train.

[0041] The disturbance simulation module comprises a random number generator chip and a digital-to-analog converter, the random number generator chip is used to generate a digital random number, an input end of the digital-to-analog converter is electrically connected with an output end of the random number generator chip, and the digital-to-analog converter is used to convert the digital random number output by the random number generator chip into a random fluctuation voltage signal, so as to simulate a disturbance signal in the process of train running, and output ends of the digital-to-analog converter are electrically connected with input ends of the first and second adders, so as to simulate a superposition state of the temperature, the speed and the disturbance signal.

[0042] The random number generator chip can be a DS363 chip, the DS363 hardware random number generator is a chip for generating random numbers based on physical noise such as thermal noise, oscillator jitter and the like. Its final output is a digital random number, usually provided in the form of a bit stream such as a sequence of 0 and 1 or multi-bit parallel data, for secure encryption, data randomization or other scenarios requiring high-quality random numbers.

[0043] According to the digital random number output by the DS363 chip, the digital-to-analog converter DAC is used to convert the digital random number into a random fluctuation voltage signal, so as to simulate an interference signal in the process of train running, and finally, the random fluctuation voltage signal is electrically connected with the remaining input ends of the first and second adders, so as to realize superposition of the temperature, the speed information and the interference signal, and make the simulation platform more consistent with the actual environment.

[0044] The random fluctuation voltage signal converted by the digital-to-analog converter DAC is filtered by a filter circuit composed of a resistor R10 and a capacitor C2, high-frequency noise is removed, and an interference electrical signal G out .

[0045] The disturbance simulation module is electrically connected with output ends of the temperature sensor unit and the encoder unit, and is used to generate a disturbance signal, so as to simulate an interference signal for temperature measurement and rotation measurement in the process of train running.

[0046] The microcontroller has no less than two input ends, is used to receive and store superposition signals of states and disturbances in the process of train running, and is used to transmit the temperature simulation signal and the speed simulation signal to a train industrial computer through a communication module.

[0047] The microcontroller is used to calculate and format data, temporarily store the superposition signals, and then transmit the superposition signals to corresponding train data industrial computers through the communication module, the temperature superposition data is displayed by the industrial computer, the rotation speed information superposition data is input into a rotation speed table, and the rotation speed of the train motor is displayed.

[0048] When selecting a microcontroller for processing train data, several key factors need to be considered, including processing power, storage capacity, interface and communication capabilities, etc. STM32 series microcontrollers based on ARM Cortex-M core can be selected, which have different performance levels from M0 to M7, suitable for different application requirements, and also include multi-channel ADC, PWM output, UART, SPI, I2C and other interfaces.

[0049] The communication module is electrically connected with the industrial computer of the train, and is used for transmitting the temperature analog signal and the speed analog signal to the industrial computer of the train.

[0050] The communication module is a communication board card based on CAN bus, which is electrically connected with the output end of the microcontroller, and is used for transmitting the data output by the microcontroller to the industrial computer. The communication board card further includes a signal input unit electrically connected with the microcontroller model, which is used for receiving analog signals from the temperature analog module and the speed analog module; a communication interface is used for data transmission with the industrial computer through different communication protocols. The communication module is electrically connected with the industrial computer through the selected communication interface. According to the selected communication protocol, the corresponding pin is connected; the corresponding driver program and communication protocol need to be installed on the industrial computer to correctly receive and analyze the data.

[0051] The communication module is a communication board card based on CAN bus, and specifically can select PCI-1711H communication board card, which is a CAN interface card based on PCI bus, supporting multi-channel CAN communication, supporting CAN 2.0A and 2.0B protocols, providing multiple CAN channels, suitable for complex CAN network. Or PCI-1710 communication board card, which is a PCICAN communication card supporting multi-channel CAN network, providing multiple digital input / output channels, suitable for connecting sensors and actuators.

[0052] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application.

Claims

1. A test platform based on unmanned mode train operation scene, characterized in that, Specifically comprising: The temperature simulation module comprises a temperature sensor unit and a heating unit, the temperature sensor unit and the microcontroller module are electrically connected, used for collecting the surface temperature of the heating unit as the simulation temperature data of the train operation and sending to the microcontroller module; The speed simulation module comprises a DC motor and an encoder unit, the encoder unit and the rotating shaft of the DC motor are coaxially connected, the encoder unit and the microcontroller module are electrically connected, used for detecting the rotating speed of the DC motor as the simulation rotating speed data of the train and sending to the microcontroller module; The disturbance simulation module is electrically connected with the output ends of the temperature sensor unit and the encoder unit, used for generating a disturbance signal for simulating the interference signal for temperature measurement and rotation measurement during the train operation; The microcontroller module is electrically connected with the communication module, used for receiving the temperature data and the rotating speed data after superimposing the interference signal, constituting the temperature simulation signal and the rotating speed simulation signal, and transmitting to the communication module through the serial port; The communication module is electrically connected with the industrial computer of the train, used for transmitting the temperature simulation signal and the rotating speed simulation signal to the industrial computer of the train. 2.The train operation scene test platform based on unmanned mode according to claim 1, wherein: The temperature sensor unit comprises a temperature sensor and a first adder, the temperature sensor and the output end of the disturbance simulation module are electrically connected with the input end of the first adder, the output end of the first adder is electrically connected with the microcontroller module, the temperature sensor is used for collecting the surface temperature of the heating unit and converting the temperature data into an analog quantity, the disturbance simulation module is used for generating a disturbance signal, and the first adder is used for superimposing the disturbance signal generated by the disturbance simulation module and the temperature analog quantity generated by the temperature sensor, simulating the temperature data under the train operation.

3. The unmanned mode-based train operation scene test platform according to claim 2, characterized in that: The speed simulation module further comprises a second adder, the output end of the encoder is electrically connected with the input end of the second adder, the output end of the second adder is electrically connected with the microcontroller module, the encoder is used for collecting the rotating speed analog quantity of the DC motor, and the second adder is used for superimposing the disturbance signal generated by the disturbance simulation module and the rotating speed analog quantity output by the encoder, simulating the rotating speed data under the train operation.

4. The unmanned mode-based train operation scene test platform according to claim 2, characterized in that: The disturbance simulation module comprises a random number generator chip and a digital-to-analog converter, the random number generator chip is used for generating a digital random number, the input end of the digital-to-analog converter is electrically connected with the output end of the random number generator chip, used for converting the digital random data output by the random number generator chip into a random fluctuation voltage signal, used for simulating the disturbance signal during the train operation, and the output end of the digital-to-analog converter is used as the output of the disturbance simulation module.

5. The unmanned mode-based train operation scene test platform according to claim 1, characterized in that: The communication module comprises a signal input port and a communication interface, the signal input port is electrically connected with the microcontroller model, the communication interface is electrically connected with the industrial computer, and the communication module is used for transmitting the data output by the microcontroller to the industrial computer.

Images