Comprehensive test platform for various types of speed sensors

Abstract

The utility model belongs to the technical field of railway equipment, and particularly relates to a comprehensive test platform for various types of speed sensors, which comprises a test operation table and a speed measurement rotary table. The test operation table comprises an operation table cabinet body, a display and a control panel are mounted on the front surface of the operation table cabinet body, and a test host and a test control unit are arranged in the operation table cabinet body; the speed measuring rotary table comprises a rotary table cabinet body, various speed sensor connector bases and a gear box are installed on the front face of the rotary table cabinet body, a motor and a motor controller are arranged in the rotary table cabinet body, a measured speed sensor is installed on the gear box, and a gear is arranged in the gear box. A tested speed sensor is connected to the speed sensor connector base, and the speed sensor connector base is connected with the test control unit; the test host controls the motor through the motor controller to drive the gear in the gearbox to rotate, so that the tested speed sensor generates a speed signal waveform. According to the utility model, automatic testing of different types of speed sensors can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway equipment, and in particular relates to a comprehensive testing platform for various types of speed sensors. Background Art

[0002] In recent years, the construction of domestic high-speed railways has developed rapidly, and the number of operating lines and EMUs has increased rapidly. As the core control equipment of EMUs, the reliability and safety of ATP and LKJ equipment are directly related to the safe operation of EMUs. Speed ​​and distance measurement is one of the core functions of ATP and LKJ equipment. Inaccurate speed and distance measurement will seriously affect the function of ATP and LKJ equipment to ensure driving safety. Therefore, once the speed sensor fails, it will directly affect the driving safety of the EMU. Through the analysis and summary of the application and maintenance of speed sensors of ATP and LKJ equipment in recent years, it is found that there are the following problems in the application of speed sensors:

[0003] 1. There are many types of speed sensors used in ATP and LKJ equipment, and different types of speed sensors are not uniform in appearance, installation method and hardware interface;

[0004] 2. There are only inspection tools for specific types of speed sensors, and there is a lack of a comprehensive maintenance platform that is fully compatible with all types of ATP and LKJ speed sensors.

[0005] Based on the above reasons, we designed a comprehensive test platform for various types of speed sensors. Summary of the invention

[0006] The utility model aims to solve the problems existing in the prior art and propose a comprehensive test platform for various types of speed sensors to realize automatic testing of different types of speed sensors.

[0007] To achieve the above purpose, the technical solution adopted is:

[0008] A comprehensive test platform for various types of speed sensors, including a test operating table and a speed measuring turntable arranged side by side;

[0009] The test console includes a console cabinet, a display and a control panel are installed on the front of the console cabinet, a test host and a test control unit are arranged inside the console cabinet, and the display, control panel and test control unit are connected to the test host through cables;

[0010] The speed measuring turntable includes a turntable cabinet, a plurality of speed sensor connector bases and a gear box are installed on the front of the turntable cabinet, a motor and a motor controller are arranged inside the turntable cabinet, a speed sensor to be measured is installed on the gear box, and a gear is arranged inside the gear box; the speed sensor to be measured is connected to the speed sensor connector base, and the speed sensor connector base is connected to the test control unit; the test host controls the motor through the motor controller to drive the gears in the gear box to rotate, so that the speed sensor to be measured generates a speed signal waveform.

[0011] According to the utility model of the comprehensive test platform for speed sensors of various models, further, the control panel is provided with three digital display screens, which respectively display the test voltage, the motor speed and the test speed.

[0012] According to the utility model of various types of speed sensor comprehensive test platforms, further, two operation control buttons are arranged on the control panel, namely the main power switch button and the motor power switch button; one end of the main power switch button is connected to an external 220V power supply, and the other end is connected to a power management unit, and the power management unit provides stable power supplies of different voltages for the test operating table, various electrical components of the speed measuring turntable and the speed sensor being measured; the control panel is also provided with a motor operation indicator light and an emergency stop button.

[0013] According to the utility model of the comprehensive test platform for various types of speed sensors, further, the test control unit includes a DC24V power supply, a DC15V power supply, a digital multimeter, an oscilloscope and a relay adapter module, the DC24V power supply and the DC15V power supply are used to provide speed channel power supply to the speed sensor under test; the digital multimeter is used to measure the impedance of each channel of the AG43 speed sensor; the oscilloscope is used to measure the output speed signal waveform of each channel of the speed sensor under test; the relay adapter module is a relay module composed of multiple relays, which is used to switch the control channel and connect the specified channel of the speed sensor under test to the measurement interface of the digital multimeter or the oscilloscope.

[0014] According to the utility model of the comprehensive test platform for speed sensors of various types, further, a first speed sensor mounting plate is arranged on the top of the gear box, on which CDG11 and AG43 speed sensor mounting holes are opened; a second speed sensor mounting plate is arranged on the left side of the gear box, on which a short-axis Hall type speed sensor mounting hole is opened; a third speed sensor mounting plate is arranged on the right side of the gear box, on which a long-axis Hall type speed sensor mounting hole is opened; a fourth speed sensor mounting plate is arranged on the front of the gear box, on which a photoelectric speed sensor mounting hole is opened.

[0015] According to the various types of speed sensor comprehensive test platforms of the utility model, further, an observation hole is opened on the gear box for observing and measuring the clearance between the speed sensor under test and the gear.

[0016] According to the utility model of the comprehensive test platform for various types of speed sensors, further, the speed sensor connector base includes an AG43 speed sensor socket, an HS22 series speed sensor socket, a DF16 photoelectric speed sensor 14-core socket, and a DF16 photoelectric speed sensor 19-core socket. Other types of speed sensors are connected to the speed measuring turntable via adapter cables connected to the DF16 series sockets.

[0017] The beneficial effects achieved by adopting the above technical solution are:

[0018] The utility model provides a comprehensive test platform for various types of speed sensors. The speed sensor to be tested is installed in the corresponding installation hole of the gear box. The test host controls the motor through the motor controller to drive the gear in the gear box to rotate, so that the speed sensor to be tested can detect the speed signal. The relay adapter module selects a speed channel in the speed sensor to be connected to a digital multimeter to test the speed channel impedance, or to an oscilloscope to test the speed channel signal quality, thereby realizing the automatic test function of the speed sensor. In addition, the speed sensor connector base provides multiple types of speed sensor sockets, which can test the speed sensors of various types of ATP and LKJ equipment, and realizes compatibility with different hardware interfaces. The utility model provides a comprehensive test platform for various types of speed sensors with high integration and strong practicality, which improves the convenience of testing various types of speed sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. The drawings are only used to show some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0020] Figure 1 It is a principle block diagram of the comprehensive test platform for various types of speed sensors of the embodiment of the utility model;

[0021] Figure 2 It is a front view of the comprehensive test platform for various types of speed sensors in the embodiment of the utility model, in which 1-1 represents a display, 1-2 represents a USB interface, 1-3 represents a digital display screen, 1-4 represents a gear box, 1-5 represents a sensor connector base, 1-6 represents a test operating table, and 1-7 represents a speed measuring turntable;

[0022] Figure 3 It is a side view of a comprehensive test platform for various types of speed sensors according to an embodiment of the utility model;

[0023] Figure 4 It is a rear view of the comprehensive test platform for various types of speed sensors of the embodiment of the utility model;

[0024] Figure 5 5-1 is a cross-sectional view of a gearbox according to an embodiment of the present utility model, wherein 5-2 is a gearbox, 5-3 is a gear, and 5-4 is a drive shaft;

[0025] Figure 6 A schematic diagram of the structure of the gears in the gear box of the embodiment of the utility model;

[0026] Figure 7 It is a communication interface circuit between a relay switching module and a test host in an embodiment of the utility model;

[0027] Figure 8 It is a circuit schematic diagram of a relay switching module according to an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings of the specific embodiments of the utility model to clearly and completely describe the exemplary scheme of the utility model. Unless otherwise defined, the technical terms or scientific terms used in the utility model should be the common meanings understood by people with ordinary skills in the relevant field.

[0029] like Figures 1 to 4 As shown, the comprehensive test platform for various types of speed sensors of this embodiment includes a test operation table and a speed measuring turntable arranged side by side, so as to realize the automatic test function of different types of speed sensors.

[0030] The test console includes a console cabinet, and a display, a control panel and a 2-way USB interface are installed on the front of the console cabinet. The display adopts a 27-inch display to display the user interaction interface, which is convenient for users to quickly complete the settings of the speed sensor to be tested, the test item settings, and perform related test functions. There are three digital display screens on the control panel, which respectively display the test voltage, motor speed and test speed. There are two operation control buttons with indicator lights on the control panel, namely the main power switch button and the motor power switch button. The indicator lights are convenient for checking the power-on status of each part at any time. Among them, the main power switch button is used for powering on and off the external main power input, and the motor power switch button is used for powering on and off the motor power. The control panel is also provided with a motor running indicator light and an emergency stop button. The motor running indicator light is used to display the motor running status and prompt the operator to pay attention to operation safety. The emergency stop button is used to manually cut off the motor power supply and stop the test. One end of the main power switch button is connected to an external 220V power supply, and the other end is connected to a power management unit. The power management unit provides a stable and reliable power supply for the test console, various electrical components of the speed measuring turntable, and the speed sensor being tested. The total power is not less than 500W, and the output voltage includes a 220V AC power supply provided to the test host, test control unit, display and other equipment.

[0031] A test host and a test control unit are set up inside the operating console cabinet. The display, control panel and test control unit are connected to the test host through cables. The test host has built-in test software, which is mainly used to control the start and end of the test, configure test items, set test indicators, view test results, generate test reports, etc. It also has the function of tracing historical data.

[0032] The test control unit includes a DC24V power supply, a DC15V power supply, a digital multimeter, an oscilloscope and a relay adapter module, and supports automatic execution of resistance and function tests of each channel of the speed sensor under test.

[0033] The DC24V power supply and DC15V power supply are used to provide speed channel power supply to the speed sensor under test. The digital multimeter is used to measure the impedance of each channel of the AG43 speed sensor (3-channel sensor). The oscilloscope is used to measure the output speed signal waveform of each channel of the speed sensor under test, and test the high and low level voltage, signal cycle, phase, duty cycle, rising edge rise time and falling edge fall time of the speed signal under different motor speeds.

[0034] The relay transfer module is a relay module composed of multiple relays. According to the speed sensor to be measured and the test requirements, the control channel is switched to connect the specified channel of the speed sensor to the measurement interface of the digital multimeter or oscilloscope. Figure 7 The communication interface circuit between the relay transfer module and the test host is given. Figure 8In the test, each speed channel of the speed sensor (supporting channel 1 to channel 8) is connected to a digital multimeter to test the channel impedance through the relay adapter module according to the test requirements, or connected to an oscilloscope to test the speed channel signal quality, so as to measure the various indicators of the speed signal of the specified channel of the speed sensor. Figure 8 The circuit diagram also provides power to the speed sensor.

[0035] During the test, the RS232 serial port of the test host controls the relay adapter module to switch channels and switch between DC24V and DC15V power supplies. The RS485 interface of the test host controls the motor controller to drive the motor to drive the gears to rotate, and connects the speed channel to an oscilloscope or digital multimeter for measurement.

[0036] The speed measuring turntable is used to install the speed sensor to be measured, including a turntable cabinet. Various speed sensor connector bases and gear boxes are installed on the front of the turntable cabinet. The inside of the turntable cabinet is equipped with a motor and a motor controller. The gear box is equipped with gears. The motor is connected to the gear box drive shaft, and the gears are fixed on the drive shaft. Figure 5 and Figure 6 As shown, the test host controls the motor to rotate through the motor controller, drives the gears in the gear box to rotate through the drive shaft, and makes the speed sensor under test generate a speed signal waveform.

[0037] The speed sensor to be measured is installed on the gearbox. Specifically, the first speed sensor mounting plate is arranged on the top of the gearbox, and the mounting holes for CDG11 and AG43 speed sensors are provided on the mounting plate. The second speed sensor mounting plate is arranged on the left side of the gearbox, and the mounting holes for short-axis Hall-type speed sensors of the HS22, CDG and other series are provided on the mounting plate. The third speed sensor mounting plate is arranged on the right side of the gearbox, and the mounting holes for long-axis Hall-type speed sensors of the HS22, CDG and other series are provided on the mounting plate. The fourth speed sensor mounting plate is arranged on the front of the gearbox, and the mounting holes for photoelectric speed sensors of the TQG and other series are provided on the mounting plate. An observation hole is provided on the gearbox for observing and measuring the gap between the speed sensor to be measured and the gear. The gears in this embodiment use gears with a module of 2.0 and a number of teeth of 80. The rotation of the gears is used to make the speed sensor to be measured generate a speed signal.

[0038] The speed sensor cable to be measured is connected to the corresponding socket of the speed sensor connector base, and the speed sensor connector base is connected to the wiring terminal of the relay adapter module through the cable to realize the transmission of the speed signal of the speed sensor to be measured.

[0039] There are four types of speed sensor connector bases in this embodiment, namely, AG43 speed sensor socket, HS22 series speed sensor socket, DF16 photoelectric speed sensor 14-core socket (compatible with TQG series speed sensor), DF16 photoelectric speed sensor 19-core socket (compatible with TQG series speed sensor). For other types of speed sensors not within this range, they are connected to the speed measuring turntable through an adapter cable connected to the DF16 series socket.

[0040] In short, the utility model can support ATP and LKJ in-use sensors such as AG43 series speed sensors, HS22 series speed sensors, DF16 series speed sensors, CDG series speed sensors, TQG series speed sensors, and supports the expansion of other types of sensors through adapter cables, achieving compatibility with different hardware interfaces. The comprehensive test platform for various types of speed sensors can measure the number of pulses of each channel of the speed sensor under different gear speeds and different steering conditions in the gearbox, the high and low level values, period, maximum and minimum duty cycle, rising edge time, falling edge time, maximum phase difference, minimum phase difference and other technical indicators of the speed sensor output waveform, and realize the automatic testing function of various speed sensors of different models of ATP and LKJ. When replacing different models of speed sensors, you only need to install the speed sensor under test to the corresponding mounting hole of the gearbox, connect the speed sensor cable to the corresponding speed sensor socket, and the test host will automatically complete the relevant test process after selecting the corresponding model.

[0041] The preferred embodiments for implementing the present invention have been described in detail above, but it should be understood that the role of these embodiments is only to exemplify, and is not intended to limit the scope, applicability or configuration of the present invention in any way. The protection scope of the present invention is defined by the attached claims and their equivalents. A person of ordinary skill in the art can make many changes to the above embodiments under the guidance of the present invention, and these changes all fall within the protection scope of the present invention.

Claims

1. A comprehensive test platform for various types of speed sensors, characterized in that: It includes a test operation table and a speed measuring turntable arranged side by side; The test console includes a console cabinet, a display and a control panel are installed on the front of the console cabinet, a test host and a test control unit are arranged inside the console cabinet, and the display, control panel and test control unit are connected to the test host through cables; The speed measuring turntable includes a turntable cabinet, a plurality of speed sensor connector bases and a gear box are installed on the front of the turntable cabinet, a motor and a motor controller are arranged inside the turntable cabinet, a speed sensor to be measured is installed on the gear box, and a gear is arranged inside the gear box; the speed sensor to be measured is connected to the speed sensor connector base, and the speed sensor connector base is connected to the test control unit; the test host controls the motor through the motor controller to drive the gears in the gear box to rotate, so that the speed sensor to be measured generates a speed signal waveform.

2. The comprehensive test platform for various types of speed sensors according to claim 1 is characterized in that: The control panel is provided with three digital display screens, which respectively display the test voltage, the motor rotation speed and the test speed.

3. The comprehensive test platform for various types of speed sensors according to claim 2 is characterized in that: The control panel is provided with two operation control buttons, namely a main power switch button and a motor power switch button; one end of the main power switch button is connected to an external 220V power supply, and the other end is connected to a power management unit, and the power management unit provides stable power supplies of different voltages for the test operating table, various electrical components of the speed measuring turntable and the speed sensor being measured; the control panel is also provided with a motor operation indicator light and an emergency stop button.

4. The comprehensive test platform for various types of speed sensors according to claim 1 is characterized in that: The test control unit includes a DC24V power supply, a DC15V power supply, a digital multimeter, an oscilloscope and a relay adapter module. The DC24V power supply and the DC15V power supply are used to provide speed channel power to the speed sensor under test; the digital multimeter is used to measure the impedance of each channel of the AG43 speed sensor; the oscilloscope is used to measure the output speed signal waveform of each channel of the speed sensor under test; the relay adapter module is a relay module composed of multiple relays, which is used to switch the control channel and connect the specified channel of the speed sensor under test to the measurement interface of the digital multimeter or the oscilloscope.

5. The comprehensive test platform for various types of speed sensors according to claim 1 is characterized in that: A first speed sensor mounting plate is arranged on the top of the gear box, and CDG11 and AG43 speed sensor mounting holes are opened on the mounting plate; a second speed sensor mounting plate is arranged on the left side of the gear box, and a short-axis Hall type speed sensor mounting hole is opened on the mounting plate; a third speed sensor mounting plate is arranged on the right side of the gear box, and a long-axis Hall type speed sensor mounting hole is opened on the mounting plate; a fourth speed sensor mounting plate is arranged on the front of the gear box, and a photoelectric speed sensor mounting hole is opened on the mounting plate.

6. The comprehensive test platform for various types of speed sensors according to claim 1 or 5, characterized in that: The gear box is provided with an observation hole for observing and measuring the clearance between the speed sensor to be measured and the gear.

7. The comprehensive test platform for various types of speed sensors according to claim 1 is characterized in that: The speed sensor connector base includes an AG43 speed sensor socket, an HS22 series speed sensor socket, a DF16 photoelectric speed sensor 14-core socket, and a DF16 photoelectric speed sensor 19-core socket. Speed ​​sensors that are not within the above range are connected to the speed measuring turntable via an adapter cable connected to the DF16 series socket.

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