CN218629874U - Train sensor test system - Google Patents
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- CN218629874U CN218629874U CN202223042779.2U CN202223042779U CN218629874U CN 218629874 U CN218629874 U CN 218629874U CN 202223042779 U CN202223042779 U CN 202223042779U CN 218629874 U CN218629874 U CN 218629874U
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Abstract
The utility model provides a train sensor test system, including industrial computer, the numerical control power, speed test fixture and pressure test fixture, speed test fixture includes speed parameter acquisition module, speed power module, speed sensor interface and speed signal interface, pressure test fixture includes pressure parameter acquisition module, pressure generation module, pressure sensor interface and pressure signal interface, wherein industrial computer and numerical control power, speed parameter acquisition module, speed power module, pressure parameter acquisition module, pressure generation module all connects, speed parameter acquisition module and speed signal interface connection and data collection, pressure parameter acquisition module and pressure signal interface connection and data collection, numerical control power also with pressure signal interface connection, the pressure sensor interface sets up the air outlet at pressure generation module. The utility model discloses can realize the detection to speedtransmitter on one set of equipment, can realize the detection to pressure sensor again.
Description
Technical Field
The utility model relates to a sensor test system, concretely relates to speedtransmitter and pressure sensor's that use on train test system.
Background
The speed is a very important parameter in the running process of the train, and all trains are provided with speed sensors to monitor the parameter in real time so as to ensure the driving safety. The present commonly used speed sensor has photoelectric sensor, magnetoelectric sensor and hall sensor, like application number CN 200620051051051.8, the utility model patent of the name "non-contact train photoelectric velocity sensor", application number CN201920878215.1, the utility model patent of the name "a become magnetic resistance formula multichannel magnetoelectric speed sensor", application number CN202121173110.X, the utility model patent of the name "a shaft end hall speed sensor" are adopted photoelectric sensor, magnetoelectric sensor and hall sensor respectively and are tested the speed.
The air pressure value of the train air circuit plays a crucial role in ensuring that the train can normally complete braking and air release, and in order to avoid risks caused by overhigh or overlow air pressure, the air pressure value needs to be monitored by a pressure sensor in real time.
The sensor needs to be tested before being put into use, so that the performance is stable, the online operation failure rate of the sensor is reduced, and the purpose of forward movement of the monitoring point is achieved. For example, the utility model patent with the name of "portable speed sensor detection device and system" and application number CN202120203201.7 discloses a device and system for detecting a speed sensor. Also disclosed is an apparatus for detecting a pressure sensor, as disclosed in the utility model patent application No. CN201220519695.0 entitled "a detection apparatus for a pressure sensor dedicated to a locomotive". The above solutions can only detect one of the sensors, and cannot detect both the speed sensor and the pressure sensor in one system.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to current problem that integration is not high, the function is incomplete in to the detection device of train sensor, provided a train sensor test system, can realize the detection to speedtransmitter on one set of equipment, can realize the detection to pressure sensor again.
The utility model discloses a solve the technical means that above-mentioned problem adopted and do: the utility model provides a train sensor test system, including industrial computer, the numerical control power, speed test fixture and pressure test fixture, speed test fixture includes speed parameter acquisition module, speed power module, speed sensor interface and speed signal interface, pressure test fixture includes pressure parameter acquisition module, pressure generation module, pressure sensor interface and pressure signal interface, wherein industrial computer and numerical control power, speed parameter acquisition module, speed power module, pressure parameter acquisition module, pressure generation module all connects, speed parameter acquisition module and speed signal interface connection and data collection, pressure parameter acquisition module and pressure signal interface connection and data collection, numerical control power also with pressure signal interface connection, the pressure sensor interface sets up the air outlet at pressure generation module.
Furthermore, the pressure generation module comprises an air compressor, a supercharger and an adjusting device which are connected, the adjusting device is in control connection with an industrial computer, and an air outlet of the adjusting device is connected to a pressure sensor interface. The air compressor compresses air, then the air is pressurized again through the supercharger, and then the air pressure is adjusted to the corresponding size through the adjusting device.
Furthermore, the adjusting device comprises an analog quantity output module which is in control connection with the industrial computer, and an electric proportional valve which is in control connection with the analog quantity output module. The industrial computer controls the current output to the electric proportional valve through the analog quantity output module, and the electric proportional valve adjusts the air pressure to the corresponding size through the input current.
Further, the pressure sensor interface comprises a standard sensor interface and a sensor interface to be detected which are arranged at the air outlet of the pressure generation module, and the pressure signal interface comprises a standard signal port and a signal port to be detected.
Furthermore, the speed sensor interface comprises a photoelectric interface, a Hall interface and a magnetoelectric interface, and the speed signal interface comprises a Hall signal port, a photoelectric signal port and a magnetoelectric signal port; the numerical control power supply is connected with the Hall signal port and the photoelectric signal port, the speed parameter acquisition module is connected with the Hall signal port, the photoelectric signal port and the magnetoelectric signal port, the magnetoelectric interface and the Hall interface are arranged near the speed power module, and the photoelectric interface is connected with the speed power module. During testing, the sensor end of the photoelectric sensor is connected with the photoelectric interface, the signal output end is connected with the photoelectric signal port, or the sensor end of the Hall sensor is connected with the Hall interface, the signal output end is connected with the Hall signal port, or the sensor end of the magnetoelectric sensor is connected with the magnetoelectric interface, and the signal output end is connected with the magnetoelectric signal port; the industrial computer controls the numerical control power supply to provide proper voltage for the photoelectric sensor or the Hall sensor through the photoelectric signal port or the Hall signal port, the industrial computer also controls the speed power module to simulate the operation environment so that each sensor generates corresponding signals, and the speed parameter acquisition module acquires parameters of each sensor through the Hall signal port, the photoelectric signal port and the magnetoelectric signal port and transmits the parameters to the industrial computer to compare and judge the parameters.
Further, the speed parameter acquisition module comprises an oscilloscope and a control panel, the control panel is connected with the Hall signal port, the photoelectric signal port and the magnetoelectric signal port, the oscilloscope is connected with the control panel, and the oscilloscope and the control panel are connected with an industrial computer. The control panel is connected with the Hall signal port, the photoelectric signal port or the magnetoelectric signal port according to the command of the industrial computer, receives corresponding sensor signals and simultaneously transmits the sensor signals to the oscilloscope, and the oscilloscope and the control panel transmit the parameters which are respectively tested by the oscilloscope and the control panel to the industrial computer for comparison and judgment.
Furthermore, the control panel comprises a single chip microcomputer, and a current measuring unit, an internal resistance measuring unit, a load resistance switching unit and a self-checking signal unit which are controlled by the single chip microcomputer. Detecting the current consumption of the photoelectric sensor and the Hall sensor through a current measuring unit; detecting the internal resistance of the magnetoelectric sensor through an internal resistance measuring unit; providing proper load resistance for the test of each sensor through a load resistance switching unit; and providing a simulated signal for the test system through the self-test signal unit so as to perform self-test on various performances of the oscilloscope, the current measuring unit and the internal resistance measuring unit.
Furthermore, the current measuring unit comprises a current detecting chip and an analog-to-digital conversion chip, the current detecting chip is connected with the Hall signal port and the photoelectric signal port, and the analog-to-digital conversion chip is connected with the single chip microcomputer. The current detection chip measures the current consumed by the Hall sensor or the photoelectric sensor, and the singlechip controls the analog-to-digital conversion chip to read the current value measured by the current detection chip, convert the current value into a signal which can be displayed by a computer and transmit the signal to an industrial computer.
Further, the internal resistance measuring unit comprises a constant voltage source chip connected in series with the magnetoelectric signal port, a partial pressure internal resistance and an analog-to-digital conversion chip connected with the magnetoelectric signal port. The constant voltage source chip provides constant voltage for the series circuit, the resistance value of the divided internal resistance is constant, the internal resistance of the magneto-electric sensor is calculated, the singlechip controls the analog-digital conversion chip to read the internal resistance value, convert the internal resistance value into a signal which can be displayed by a computer and transmit the signal to the industrial computer.
Further, the load resistance switching unit comprises a voltage type load resistance switching unit connected with the voltage type sensor in parallel and a current type load resistance switching unit connected with the current type sensor in series, the voltage type load resistance switching unit comprises a switch chip controlled by the single chip microcomputer and load resistors connected with different interfaces of the switch chip in series, and the current type load resistance switching unit comprises a relay controlled by the single chip microcomputer and load resistors connected with the relay.
Further, the self-test signal unit comprises a waveform generator, a current consumption simulator and a magneto-electric sensor internal resistance simulator.
Further, the waveform generator includes a relay and a frequency divider controlled by a single chip microcomputer. During self-checking, the single chip microcomputer controls the relay to connect the frequency divider to the control board to form a self-checking waveform generating circuit.
Furthermore, the current consumption simulator comprises a relay controlled by the single chip microcomputer and a standard resistor connected with the relay, wherein one end of the relay is connected with the standard resistor, and the other end of the relay is connected with the numerical control power supply. During self-checking, the single chip microcomputer controls the relay to connect the standard resistor to the numerical control power supply, and standard consumed current is simulated.
Furthermore, the magneto-electric sensor internal resistance simulator comprises a relay controlled by a single chip microcomputer and a standard resistor connected with the relay, wherein one end of the relay is connected with the standard resistor, and the other end of the relay is connected with the magneto-electric signal port. During self-checking, the single chip microcomputer controls the relay to incorporate the standard resistor into the magnetoelectric signal port, and the standard internal resistor of the magnetoelectric sensor is simulated.
Furthermore, the speed power module comprises a servo controller connected with the industrial host, a servo motor controlled by the servo controller and a transmission case driven by the servo motor to work, a Hall interface and a magnetoelectric interface are arranged on the periphery of the outer side of a gear of the transmission case, and a photoelectric interface is arranged on a gear shaft sleeve.
Furthermore, the industrial computer comprises a display, an input device and an industrial host which are connected, and the industrial host is connected with the numerical control power supply, the speed parameter acquisition module and the speed power module. The input device is used for receiving a test instruction of a user, the industrial host controls the test system to test according to the instruction, and the display displays a test result on the screen.
Further, the industrial computer also comprises a printer for printing the test result.
Furthermore, the industrial computer also comprises a wireless communication module which wirelessly transmits the running state and the test result of the system to external equipment.
The beneficial effects of the utility model are that:
1. the utility model discloses integrate speed sensor and pressure sensor to a system and test, can accomplish speed sensor and pressure sensor's capability test simultaneously, integrate a plurality of parameters of multiple speed sensor to a test system simultaneously, can realize photoelectricity, hall and magnetoelectric sensor's capability test on single system.
2. The utility model detects the current consumption of the photoelectric sensor and the Hall sensor through the current measuring unit; detecting the internal resistance of the magnetoelectric sensor through an internal resistance measuring unit; appropriate load resistance is provided for various sensor tests through the load resistance switching unit; and providing a simulated signal for the test system through the self-test signal unit so as to perform self-test on various performances of the oscilloscope, the current measuring unit and the internal resistance measuring unit. Therefore, the detection function is complete, and the performance of the sensor can be tested in all directions.
Drawings
FIG. 1 is a schematic view of an overall structure of the embodiment;
FIG. 2 is a schematic diagram of a connection structure according to an embodiment;
FIG. 3 is a schematic diagram illustrating the operation of a current measuring unit according to an embodiment;
FIG. 4 is a schematic diagram illustrating the operation of a resistance measuring unit according to an embodiment;
FIG. 5 is a schematic diagram illustrating an operating principle of a voltage-type load resistor switching unit according to an embodiment;
FIG. 6 is a schematic diagram illustrating the operation of a current-mode load resistance switching unit according to an embodiment;
FIG. 7 is a schematic diagram of the operation of a waveform generator according to an embodiment;
in the figure: 1. the device comprises a display, 2, an original data connecting hole, 3, a button, 4, a printer, 5, a keyboard, 6, a mouse, 7, a magneto-electric interface, 8, a Hall interface, 9, a photoelectric interface, 10, a Hall/photoelectric signal port, 11, a magneto-electric signal port, 12, a standard sensor interface, 13, a sensor interface to be tested, 14, a standard signal port and 15, a signal port to be tested.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example one
A train sensor testing system can test the performances of a pressure sensor and three speed sensors of photoelectricity, hall and magnetoelectricity which are used on a train, and comprises an industrial computer, a numerical control power supply, a speed parameter acquisition module, a speed power module, a speed sensor interface, a speed signal interface, a pressure parameter acquisition module, a pressure generation module, a pressure sensor interface and a pressure signal interface, wherein the speed parameter acquisition module, the speed power module, the speed sensor interface, the speed signal interface, the pressure parameter acquisition module, the pressure generation module, the pressure sensor interface and the pressure signal interface are shown in figure 1. The industrial computer is a man-machine interaction part of the whole test system, receives commands input by an operator, outputs test results, and controls other parts to normally work according to the input commands in the test process. The numerical control power supply provides proper voltage for the photoelectric or Hall sensor and the pressure sensor in the test process according to the instruction of the industrial computer. The speed power module simulates the operating environment of the speed sensor according to the instruction of the industrial host to enable the speed sensor to generate a signal, and the speed parameter acquisition module reads the parameter of the speed sensor and transmits the parameter to the industrial host for test judgment and output. The pressure generation module simulates the operating environment of the pressure sensor according to the instruction of the industrial host to enable the pressure sensor to generate a signal, and the pressure parameter acquisition module acquires the parameter of the pressure sensor and transmits the parameter to the industrial host for test judgment and output.
As shown in FIG. 1, the industrial computer comprises an industrial host, a display 1, an input device, a printer 4 and a wireless communication module, wherein the input device comprises a keyboard 5 and a mouse 6, although other input devices such as a voice input device, a code scanning gun and the like can also be provided. During testing, an operator can input the model of the sensor to be tested through the keyboard 5, or select the model of the sensor to be tested through the mouse 6, and can input and adjust the parameter standard of the sensor testing through the input equipment. The display 1 displays the result after the industrial host test on a screen, and can also print the test result through the printer 4, or send the test result and the running state of the test system to a remote control end through a wireless communication module (such as a GPRS module) so as to know the running condition in real time. The industrial computer can also be provided with an original data connecting hole 2, a button 3 and the like, external equipment can acquire original parameters of the sensor through the original data connecting hole 2, and a worker controls the power-on and power-off of the whole test system and the on-off of the industrial computer through the button 3.
The numerical control power supply is a programmable power supply and is communicated with the industrial host through a 232 serial port, and the industrial host controls the power supply to output 5-30V direct current voltage through the numerical control power supply to supply power to the pressure sensor, the photoelectric sensor and the Hall sensor.
In this embodiment, the pressure parameter acquisition module adopts the analog input module who is connected to the industrial host computer, and the pressure generation module includes air compressor machine, booster and adjusting device in proper order according to the air flow order, and the atmospheric pressure of outside air increases to a take the altitude after the air compressor machine compression at first, then increases the pressure again through the booster and is higher than the atmospheric pressure value that awaits measuring, and adjusting device reduces atmospheric pressure to the setting value according to the instruction of industrial host computer at last.
The regulating device comprises an analog quantity output module and an electric proportional valve, wherein in the embodiment, the analog quantity output module is connected with the industrial host, current is output to the electric proportional valve according to the instruction of the industrial host, and the electric proportional valve controls the air pressure flowing to the pressure sensor interface according to the magnitude of the input current.
In order to accurately measure various parameters of the pressure sensor, an air outlet of the pressure generation module is provided with a standard sensor interface 12 and a sensor interface 13 to be measured, correspondingly, the pressure parameter acquisition module is simultaneously connected with a standard signal port 14 and a signal port 15 to be measured, the pressure generation module simultaneously provides air pressure for the standard sensor and the pressure sensor to be measured, the pressure parameter acquisition module simultaneously acquires parameters of the standard sensor and the pressure sensor to be measured and transmits the parameters to the industrial host, and the industrial host compares the parameters of the standard sensor and the pressure sensor to be measured so as to judge the condition of the pressure sensor to be measured.
The speed power module comprises a servo controller, a servo motor and a transmission case, wherein the servo controller is connected with the industrial host and is controlled by the industrial host; the servo motor outputs rotating speed with corresponding size according to the control of the servo controller; the transmission case moves under the drive of the servo motor.
As shown in fig. 1, the speed sensor interface includes a magnetoelectric interface 7, a hall interface 8 and a photoelectric interface 9, the magnetoelectric interface 7 and the hall interface 8 are disposed at the outer periphery of the gear of the transmission case, and the photoelectric interface 9 is disposed at the gear shaft sleeve. During testing, the sensor end of the magnetoelectric sensor is connected with the magnetoelectric interface 7, and the magnetoelectric sensor generates an induction signal through the rotation of the gear of the transmission case; the sensor end of the Hall sensor is connected with the Hall interface 8, and the Hall sensor generates a sensing signal through the rotation of the gear of the transmission case; the sensor end of the photoelectric sensor is connected with the photoelectric interface 9 and rotates synchronously with the gear to output signals. Wherein the magneto-electric interface 7 and the hall interface 8 can also be integrated into one interface. Of course, in the system, the magnetoelectric sensor, the hall sensor and the photoelectric sensor need to be tested respectively and cannot be tested simultaneously.
The speed signal interface comprises a Hall signal port, a photoelectric signal port and a magnetoelectric signal port 11. Since the same reading device can be used for the signal data of the hall sensor and the signal data of the photoelectric sensor with the same specification (the same number of channels), the hall signal port and the photoelectric signal port are combined into the hall/photoelectric signal port 10 to reduce the line connection as shown in fig. 1. Because the hall sensor and the photoelectric sensor need to use an external power supply in operation, and the sensors of different models have different requirements on voltage, the voltage transmitted to the hall/photoelectric signal port 10 is controlled by a numerical control power supply.
The speed parameter acquisition module comprises an oscilloscope and a control panel, the control panel is a circuit board which is customized and developed by self, an STM32 series main control chip is adopted, the control panel is connected with the Hall/photoelectric signal port 10, the magnetoelectric signal port 11, the oscilloscope and an industrial host, and test instructions of the industrial host are received, so that the consumption current measurement of a measured sensor, the internal resistance measurement of the magnetoelectric sensor, the pulse per revolution measurement, the load resistance switching of the sensor, the switching of a test channel and the self-checking function are realized. The oscilloscope is connected with the control board and the industrial host, and reads the frequency, duty ratio, phase difference, edge time, high and low level, effective value and the like of the output signal of the sensor through the switching and transmission of the control board to the output signal of the sensor. Because the speed signal interface of the magnetoelectric sensor is different from the speed signal interfaces of the photoelectric and Hall sensors, the control panel is required to judge which type of sensor is tested so as to determine from which speed signal interface to read data during testing, and therefore, the oscilloscope obtains data from the control panel so as to avoid multiple selections.
The control panel comprises a singlechip, and a current measuring unit, an internal resistance measuring unit, a load resistance switching unit and a self-checking signal unit which are controlled by the singlechip. The singlechip is used for programming self-written software into the chip to realize the control of each test unit on the control panel.
The current measuring unit is connected with the Hall/photoelectric signal port 10, in this embodiment, a plurality of sets of professional high-side current detection chips MAX4080 are adopted, the common-mode voltage of 4.5 to 76 volts can be borne, the gain is 60 times, the current detection chips are assisted by current detection resistors, the voltage value which is detected by the current detection chips and is in proportion to the detected current is converted into digital quantity through ADS7844EB analog-to-digital conversion chips with 12-bit precision, then the current value consumed by each channel of the sensor is calculated through a single chip microcomputer and is converted into a signal which can be displayed by a computer and transmitted to an industrial computer, and the signal is displayed or printed on the display 1. The working principle of the current measuring unit is shown in fig. 2: the current detection resistor is connected with a certain channel of the sensor in series, the current detection chip amplifies the voltage at two ends of the current detection resistor, and the voltage output by the current detection chip is detected by the analog-to-digital conversion chip, so that the current consumed by the channel can be calculated.
The internal resistance measuring unit is connected with the magnetoelectric signal port 11, a plurality of groups of 5-volt constant voltage source chips REF-02 are adopted in the embodiment, each group is matched with a high-precision 350-ohm divider resistor, and then the measurement of the multichannel internal resistance of the magnetoelectric sensor is realized through the analog-digital conversion chip. The working principle of measuring the internal resistance of each channel is shown in fig. 3: a group of 5V constant voltage source chips and a divider resistor are connected with a channel of a magnetoelectric sensor in series to form a loop, analog-digital conversion chips are arranged at two ends of the channel of the sensor to measure voltages at two ends of the channel, a single chip microcomputer calculates the internal resistance of the channel of the sensor according to a 5V voltage value on the whole loop, the voltages at two ends of the channel of the sensor and the resistance value of the divider resistor, and then the internal resistance value is converted into a signal which can be displayed by a computer and is transmitted to an industrial computer so as to be displayed or printed on a display 1. The magnetoelectric sensor can generate current in the working process, so that the magnetoelectric sensor cannot work when measuring the internal resistance.
The load resistance switching unit includes a voltage-type load resistance switching unit connected in parallel with the voltage-type sensor and a current-type load resistance switching unit connected in series with the current-type sensor. In this embodiment, as shown in fig. 4, the voltage type load resistance switching unit adopts six analog switch chips ADG5408 controlled by a single chip, an on resistance of 13.5 ohms thereof, two groups of gating combinations of one out of four, a current capacity as high as 30mA, and a maximum input voltage of 36V, and can completely realize switching of load resistances of various types of sensors, thereby providing ideal loads for various voltage type sensors. In the voltage type load resistance switching unit, an analog switch chip is connected in series with a load resistance and then connected in parallel with a sensor. As shown in fig. 5, the current-mode load resistance switching unit selectively switches in three load resistances by using three relays with double poles and double throws controlled by a single chip microcomputer to serve as a load of the two-wire current sensor. In this current-type load resistance switching unit, a relay and a load resistance are connected in series with a sensor.
The self-checking signal unit comprises a waveform generator, a current consumption simulator and a magnetoelectric sensor internal resistance simulator, covers the functions of waveform generation, current consumption simulation and resistance measurement simulation, and can comprehensively realize the self-checking of various performances. In this embodiment, as shown in fig. 6, the waveform generator adopts a combination of a CD4060 frequency divider and a 32.768KHZ passive crystal oscillator to form a self-calibration waveform generating circuit, and the waveform generated by the frequency divider is connected into a sensor signal testing loop by a relay under the command of a single chip microcomputer to detect the operation condition of each testing channel of the control board. The current consumption simulator adopts the relay and the standard resistor, and when the system self-checking, the standard resistor is connected to the power supply of the sensor power supply by the relay under the command of the singlechip, so that the standard consumed current can be simulated, and then the self-checking of the consumed current detection circuit is completed. The magneto-electric sensor internal resistance simulator adopts a relay and a standard resistor, when the system is subjected to self-checking, the standard resistor is merged into a line of the magneto-electric signal port 11 by the relay under the command of the single chip microcomputer, so that the standard resistor can be simulated, and then the self-checking of the magneto-electric sensor internal resistance detection circuit is completed.
The control panel still includes pulse number measuring unit, and pulse number measuring unit includes opto-coupler and singlechip, and the opto-coupler keeps apart the signal of inputing the control panel, supplies the singlechip to count, counts out the pulse quantity that the rotatory round sensor of gear exported to judge whether the sensor falls the pulse.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (10)
1. The utility model provides a train sensor test system which characterized in that: the industrial computer is connected with the numerical control power supply, the speed parameter acquisition module is connected with the speed signal interface and acquires data, the pressure parameter acquisition module is connected with the pressure signal interface and acquires data, the numerical control power supply is also connected with the pressure signal interface, and the pressure sensor interface is arranged at an air outlet of the pressure generation module.
2. The train sensor testing system of claim 1, wherein: the pressure generation module comprises an air compressor, a supercharger and an adjusting device which are connected, the adjusting device is connected with the industrial computer in a control way, and an air outlet of the adjusting device is connected to the pressure sensor interface.
3. The train sensor testing system of claim 2, wherein: the regulating device comprises an analog quantity output module which is in control connection with the industrial computer and an electric proportional valve which is in control connection with the analog quantity output module.
4. The train sensor testing system of claim 1, wherein: the pressure sensor interface comprises a standard sensor interface and a sensor interface to be detected which are arranged at the air outlet of the pressure generation module, and the pressure signal interface comprises a standard signal port and a signal port to be detected.
5. The train sensor testing system of claim 1, wherein: the speed sensor interface comprises a photoelectric interface, a Hall interface and a magnetoelectric interface, and the speed signal interface comprises a Hall signal port, a photoelectric signal port and a magnetoelectric signal port; the numerical control power supply is connected with the Hall signal port and the photoelectric signal port, the speed parameter acquisition module is connected with the Hall signal port, the photoelectric signal port and the magnetoelectric signal port, the magnetoelectric interface and the Hall interface are arranged near the speed power module, and the photoelectric interface is connected with the speed power module.
6. The train sensor testing system of claim 5, wherein: the speed parameter acquisition module comprises an oscilloscope and a control panel, the control panel is connected with the Hall signal port, the photoelectric signal port and the magnetoelectric signal port, the oscilloscope is connected with the control panel, and the oscilloscope and the control panel are connected with an industrial computer.
7. The train sensor testing system of claim 6, wherein: the control panel comprises a singlechip, and a current measuring unit, an internal resistance measuring unit, a load resistance switching unit and a self-checking signal unit which are controlled by the singlechip;
the current measuring unit comprises a current detecting chip and an analog-to-digital conversion chip, the current detecting chip is connected with the Hall signal port and the photoelectric signal port, and the analog-to-digital conversion chip is connected with the single chip microcomputer;
the internal resistance measuring unit comprises a constant voltage source chip connected with the magnetoelectric signal port in series, a partial pressure internal resistance and an analog-to-digital conversion chip connected with the magnetoelectric signal port.
8. The train sensor testing system of claim 7, wherein: the load resistance switching unit comprises a voltage type load resistance switching unit connected with the voltage type sensor in parallel and a current type load resistance switching unit connected with the current type sensor in series, the voltage type load resistance switching unit comprises a switch chip controlled by a single chip microcomputer and load resistances connected with the switch chip in series at different interfaces, and the current type load resistance switching unit comprises a relay controlled by the single chip microcomputer and load resistances connected with the relay.
9. The train sensor testing system of claim 7, wherein: the self-checking signal unit comprises a waveform generator, a current consumption simulator and a magnetoelectric sensor internal resistance simulator;
the waveform generator comprises a relay and a frequency divider which are controlled by a single chip microcomputer;
the current consumption simulator comprises a relay controlled by a single chip microcomputer and a standard resistor connected with the relay, wherein one end of the relay is connected with the standard resistor, and the other end of the relay is connected with the numerical control power supply;
the magneto-electric sensor internal resistance simulator comprises a relay controlled by a single chip microcomputer and a standard resistor connected with the relay, wherein one end of the relay is connected with the standard resistor, and the other end of the relay is connected with a magneto-electric signal port.
10. The train sensor testing system of claim 5, wherein: the speed power module comprises a servo controller connected with the industrial host, a servo motor controlled by the servo controller and a transmission case driven by the servo motor to work, a Hall interface and a magnetoelectric interface are arranged on the periphery of the outer side of a gear of the transmission case, and a photoelectric interface is arranged on a gear shaft sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223042779.2U CN218629874U (en) | 2022-11-16 | 2022-11-16 | Train sensor test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223042779.2U CN218629874U (en) | 2022-11-16 | 2022-11-16 | Train sensor test system |
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| CN218629874U true CN218629874U (en) | 2023-03-14 |
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