A detection system and detection method for a pantograph slide plate

Abstract

The application provides a detection system and a detection method for a pantograph slide plate. The pantograph slide plate comprises an aluminum bracket and a carbon strip. The detection system comprises a clamping device, a current-carrying temperature rising device, a deformation measuring device and an environmental box. The clamping device is used for supporting the pantograph slide plate. The deformation measuring device is used for detecting the deformation of the pantograph slide plate. The environmental box can accommodate the pantograph slide plate and can provide a high-temperature environment, a low-temperature environment and a specified temperature environment. The current-carrying temperature rising device comprises a patch type temperature sensor, a pin type temperature sensor and an AC / DC power supply. The patch type temperature sensor is attached to the surface of the carbon strip and the aluminum bracket and is used for detecting the surface temperature. The measuring end of the pin type temperature sensor extends into the interior of the pantograph slide plate and is used for detecting the internal temperature. The output end of the AC / DC power supply is connected to the pantograph slide plate through a busbar. The AC / DC power supply can output AC power and DC power. The detection system can perform multiple project collaborative testing and realize evaluation under high and low temperature environments.

Description

Technical Field

[0001] This invention relates to the field of pantograph-catenary system testing in rail transit, and particularly to a testing system and method for pantograph sliding contact plates. Background Technology

[0002] The pantograph contactor is a key component for electric locomotives and EMUs to obtain electrical energy from the overhead contact line. Its current-carrying capacity and deformation resistance are directly related to the safety of train operation. In actual service, the pantograph contactor must withstand continuous current carrying, impact, mechanical wear, and environmental factors. Therefore, it is necessary to conduct rigorous testing and verification of its performance.

[0003] In existing technologies, performance tests of pantograph contactors are typically conducted using multiple independent devices, resulting in a wide variety of equipment, complex operating procedures, and high procurement and maintenance costs. Samples need to be clamped and disassembled multiple times between different devices, which not only leads to low testing efficiency but also easily introduces errors due to repeated positioning, affecting the consistency and repeatability of test data. Furthermore, existing equipment struggles to reproduce the actual service condition of the pantograph contactor, i.e., simultaneously testing deformation and other properties while it is under current-carrying conditions. Therefore, the test results cannot reflect the comprehensive performance of the pantograph contactor under actual operating conditions. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a detection system and method for pantograph sliding plates, which can perform multi-item collaborative testing and achieve evaluation under high and low temperature environments.

[0005] To address the aforementioned problems, this invention provides a detection system for a pantograph sliding plate. The pantograph sliding plate includes an aluminum support and a carbon strip disposed on the upper surface of the middle portion of the aluminum support. The detection system includes a clamping device, a current-carrying temperature rise device, a deformation measuring device, and an environmental chamber. The clamping device supports the pantograph sliding plate, the deformation measuring device detects the deformation of the pantograph sliding plate, and the environmental chamber is capable of accommodating the pantograph sliding plate and providing high-temperature, low-temperature, and specified-temperature environments. The current-carrying temperature rise device includes: A surface-mount temperature sensor is attached to the surface of the carbon strip and the aluminum support to detect surface temperature. A pin-type temperature sensor, wherein the measuring end of the pin-type temperature sensor extends into the interior of the pantograph plate to detect the internal temperature; An AC / DC power supply is provided, the output terminal of which is connected to the pantograph slide plate via a busbar. The AC / DC power supply is capable of outputting both AC and DC power, and the current intensity is adjustable. The output polarity of the AC / DC power supply is reversible, and the AC / DC power supply can automatically stop working under overcurrent or overvoltage conditions.

[0006] Furthermore, the detection system also includes: The controller is connected to the patch temperature sensor, the pin temperature sensor, the AC / DC power supply, and the environmental chamber. The controller is used to receive control commands from the industrial computer, control the environmental chamber to switch between a specified temperature environment, a high temperature environment, and a low temperature environment according to the control commands, and control the AC / DC power supply to switch on and off. The controller is also used to acquire the surface temperature and the internal temperature, and when the acquired surface temperature exceeds a first predetermined threshold or the acquired internal temperature exceeds a second predetermined threshold, the controller cuts off the AC / DC power supply. An industrial control computer is connected to the controller. The industrial control computer is used to send control signals to the controller so that the controller controls the AC / DC power supply to output a current of a predetermined intensity. The industrial control computer also receives the surface temperature and the internal temperature from the controller. The industrial control computer is further used to determine whether the current-carrying temperature rise characteristics of the pantograph sliding plate meet the requirements based on the rise of the surface temperature and the internal temperature after the AC / DC power supply has been powered for a predetermined time, when the environmental chamber is in at least one of a specified temperature environment, a high temperature environment, or a low temperature environment.

[0007] Furthermore, the clamping device includes: Workbench; A sliding rail is provided on the upper surface of the worktable; A first support rod and a fixing member, wherein the bottom end of the first support rod is slidably connected to the sliding rail, and the fixing member is used to fix the top end of the first support rod and the first end of the aluminum support. The second support rod and the support roller are provided. The bottom end of the second support rod is slidably connected to the sliding track, and the support roller is rotatably connected to the top end of the second support rod. The top end of the support roller is movably connected to the second end of the aluminum support.

[0008] Furthermore, the deformation measuring device includes: The first support base has its bottom disposed on the worktable and located below the middle of the aluminum support. A vertical displacement sensor is connected to the first support base, and the detection end of the vertical displacement sensor is connected to the bottom of the middle part of the aluminum support, for detecting the flexural deformation of the pantograph sliding plate; A measuring plate and a rotating component, wherein the measuring plate is rotatably connected to the second end of the aluminum support via the rotating component; The second support base is disposed on the workbench and located on the outer side of the second end of the pantograph slide plate; A horizontal displacement sensor is connected to the second support base, and the detection end of the horizontal displacement sensor abuts against the measuring plate to detect the extension deformation of the pantograph sliding plate.

[0009] Furthermore, the deformation measuring device also includes: The first lifting bracket is connected to the first support base via the first lifting bracket, and the first lifting bracket can drive the vertical displacement sensor to move up and down relative to the first support base. The second lifting bracket is used to connect the horizontal displacement sensor to the second support base. The second lifting bracket can drive the horizontal displacement sensor to move up and down relative to the second support base. A linear module is provided, and the second support base is connected to the worktable via the linear module. The linear module is capable of driving the second support base to move horizontally.

[0010] Furthermore, the controller is also connected to the vertical displacement sensor and the horizontal displacement sensor. The controller is used to control the environmental chamber to switch between a specified temperature environment, a high temperature environment and a low temperature environment according to the control instructions from the industrial control computer, and to control the AC and DC power supply to be turned on and off. The controller is also used to acquire the flexural deformation and the extension deformation. The industrial control computer is used to determine whether the deformation of the pantograph sliding plate meets the requirements based on the received flexural deformation and extension deformation under specified temperature, high temperature and low temperature environments, as well as the flexural deformation and extension deformation under AC / DC power supply conditions and AC / DC power supply failure conditions.

[0011] Furthermore, the detection system also includes an airtightness testing device, which comprises: The air source assembly includes, in sequence along the airflow direction, a filter, an air compressor, a condenser, a dryer, a pressure-stabilizing air tank, a safety valve, and a first one-way valve. The filter, the air compressor, the condenser, the dryer, the pressure-stabilizing air tank, the safety valve, and the first one-way valve are connected in sequence through a first pipeline. The air intake assembly includes, in sequence along the airflow direction, a pressure reducing valve, an air flow meter, a first solenoid valve, a pressure buffer tank, and a second solenoid valve. The pressure reducing valve, the air flow meter, the first solenoid valve, the pressure buffer tank, and the second solenoid valve are connected in sequence via a second pipeline. The air intake end of the pressure reducing valve is connected to the air outlet end of the first one-way valve via a third pipeline. The output end of the second solenoid valve is used to communicate with the air inlet of the pantograph slide plate.

[0012] Furthermore, the air source component also includes: A first pressure sensor, the detection end of the first pressure sensor being connected to a first pipeline between the dryer and the pressure-stabilized gas storage tank; A regeneration gas storage tank, which is connected to the dryer; The air intake assembly also includes: The second pressure sensor, the detection end of the second pressure sensor is connected to the second pipeline between the air pressure buffer tank and the second solenoid valve; The third solenoid valve is connected to the pressure buffer tank, and the output end of the third solenoid valve is used to connect to the environmental chamber. The fourth solenoid valve is connected to the second pipeline between the pressure buffer tank and the first solenoid valve; The second one-way valve is connected to the output end of the fourth solenoid valve; A silencer, which is connected to the output of the second one-way valve.

[0013] Furthermore, in the airtightness testing mode: The industrial control computer is used to issue a first control command to the controller; The controller is used to control the environmental chamber to switch to the target temperature environment of a specified temperature environment, a high temperature environment, or a low temperature environment according to the first control command, control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve and the fourth solenoid valve to close, and control the air compressor to operate until the pressure detected by the first pressure sensor reaches the first predetermined pressure. The controller is also used to control the operation of the pressure reducing valve until the pressure detected by the second pressure sensor reaches the second predetermined pressure. The controller is also used to close the first solenoid valve and maintain the closed state for a predetermined time; The industrial control computer is also used to determine whether the airtightness of the pantograph sliding plate meets the requirements under the target temperature environment based on the pressure change detected by the second pressure sensor within the predetermined time under the target temperature environment. In the flow continuity detection mode: The industrial control computer is used to issue a second control command to the controller; The controller is used to control the environmental chamber to switch to the target temperature environment of a specified temperature environment, a high temperature environment, or a low temperature environment according to the second control command, control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve and the fourth solenoid valve to close, and control the air compressor to operate until the pressure detected by the first pressure sensor reaches the third predetermined pressure. The controller is also used to control the operation of the pressure reducing valve until the pressure detected by the second pressure sensor reaches a fourth predetermined pressure. The industrial control computer is also used to determine, based on the flow rate value detected by the air flow meter, whether the flow continuity of the pantograph sliding plate meets the requirements under the target temperature environment when the sealing valve of the automatic pantograph lowering device is in the open state. Another aspect of the present invention provides a method for detecting a pantograph sliding plate, employing the pantograph sliding plate detection system described above, the detection method comprising: Environmental control steps: The control environment box provides at least one of a specified temperature environment, a high temperature environment, or a low temperature environment, so that the pantograph sliding plate is in the target temperature environment; Current-carrying temperature rise detection steps: Under the target temperature environment, control the AC / DC power supply to output a current of a predetermined intensity with a predetermined polarity, obtain the surface temperature and internal temperature, and determine whether the current-carrying temperature rise characteristics of the pantograph slide plate under the target temperature environment meet the requirements based on the rise of the surface temperature and the internal temperature after the AC / DC power supply has been powered for a predetermined time. Deformation measurement steps: Under the target temperature environment, obtain the flexural deformation and extension deformation of the pantograph sliding plate. Based on the flexural deformation and extension deformation under AC / DC power supply conditions and under AC / DC power supply unsupply conditions, determine whether the deformation of the pantograph sliding plate under the target temperature environment meets the requirements. Air tightness test steps: Under the target temperature environment, compressed air is introduced into the air passage of the pantograph sliding plate and the pressure is maintained for a predetermined time. Based on the pressure change during the pressure maintenance period, it is determined whether the air tightness of the pantograph sliding plate under the target temperature environment meets the requirements. Flow continuity testing steps: Under the target temperature environment, compressed air is introduced into the air passage of the pantograph slide plate. With the sealing valve of the automatic pantograph lowering device in the open state, the flow continuity of the pantograph slide plate under the target temperature environment is determined based on the flow rate value detected by the air flow meter.

[0014] Due to the above technical solution, the present invention has the following beneficial effects: The pantograph sliding plate detection system according to the present invention includes a clamping device, a current-carrying temperature rise device, a deformation measurement device, and an environmental chamber. Through the above-mentioned modular integrated design, the detection system of the present invention integrates clamping, current-carrying temperature rise, deformation measurement, and environmental simulation functions into one, effectively solving the problems of equipment dispersion, repeated sample clamping, difficulty in conducting multi-item collaborative testing under current-carrying conditions, and difficulty in conducting comprehensive performance evaluation under high and low temperature environments in the prior art. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the present invention, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0016] Figure 1 This is a structural diagram of a pantograph sliding plate detection system according to an embodiment of the present invention; Figure 2 This is a partial structural diagram of a pantograph sliding plate detection system according to an embodiment of the present invention; Figure 3 This is a schematic diagram of an airtightness testing device according to an embodiment of the present invention.

[0017] Figure label: 110. Workbench; 120. Sliding rail; 211. First support rod; 212. Fixing component; 221. Second support rod; 222. Support roller; 311. First support base; 312. First lifting bracket; 313. Vertical displacement sensor; 321. Rotating component; 322. Measuring plate; 331. Second support base; 332. Horizontal displacement sensor; 333. Linear module; 334. Second lifting bracket; 410. AC / DC power supply; 420. Surface mount temperature sensor; 430. Pin-type temperature sensor; 510. Controller; 520. Industrial computer; 610. Air source assembly; 611. Filter; 612. Air compressor; 613. Condenser; 614. Dryer; 615. Regenerated air tank; 616. First pressure sensor; 617. Pressure-stabilized air tank; 618. First check valve; 619. Safety valve; 620. Intake assembly; 621. Pressure reducing valve; 622. Air flow meter; 623. First solenoid valve; 624. Second check valve; 625. Silencer; 626. Pressure buffer tank; 627. Second pressure sensor; 628. Fourth solenoid valve; 629a. Second solenoid valve; 629b. Third solenoid valve; 710, aluminum support; 720, carbon fiber strip. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0020] The following describes the pantograph sliding plate detection system according to an embodiment of the present invention.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, the pantograph slide plate includes an aluminum support 710 and a carbon strip 720 disposed on the upper surface of the middle part of the aluminum support 710. The detection system includes a clamping device, a current-carrying temperature rise device, a deformation measuring device, and an environmental chamber.

[0022] The clamping device is used to support the pantograph slide plate.

[0023] The deformation measuring device is mounted on the workbench 110 and is used to detect the deformation of the pantograph slide plate. The deformation measuring device can use various types of displacement sensors, such as laser displacement sensors, grating rulers, or differential transformer displacement sensors (LVDT), which can accurately measure the displacement changes of the pantograph slide plate in the vertical and horizontal directions, thereby efficiently and accurately measuring the deformation of the pantograph slide plate.

[0024] The environmental chamber can accommodate the pantograph strip and provide high-temperature, low-temperature, and specified-temperature environments. During high-temperature or low-temperature tests, the entire device with the pantograph strip, or at least the pantograph strip itself, can be placed inside the environmental chamber. The required test temperature environment is provided by the temperature control system of the environmental chamber, thereby simulating the service conditions of the pantograph strip under different ambient temperatures.

[0025] The current-carrying temperature rise device includes a patch temperature sensor 420, a pin temperature sensor 430, and an AC / DC power supply 410. The patch temperature sensor 420 is attached to the surfaces of the carbon strip 720 and the aluminum support 710 to detect surface temperature. The patch temperature sensor 420 is a temperature-sensitive element with a flat, flexible structure. It can be tightly attached to the surfaces of the carbon strip 720 and the aluminum support 710 by thermally conductive adhesive or mechanical pressing, providing a fast response and real-time reflection of temperature changes on the pantograph plate surface. The pin temperature sensor 430's measuring end extends into the interior of the pantograph plate to detect internal temperature. The pin temperature sensor 430 has a slender probe structure that can be inserted into a pre-set temperature measuring hole inside the pantograph plate. The temperature-sensing element inside the probe can directly measure the temperature of the core area of ​​the pantograph plate, providing a more accurate reflection of the pantograph plate's true thermal state under current-carrying conditions than surface measurements. The output terminal of the AC / DC power supply 410 is connected to the pantograph slide plate via a busbar. The AC / DC power supply 410 can output both AC and DC power, with adjustable current intensity and reversible output polarity, enabling switching of the output current direction without changing the external wiring. The AC / DC power supply 410 can also automatically stop working in case of overcurrent or overvoltage to protect the pantograph slide plate and the test equipment.

[0026] Through the above modular integrated design, the detection system of the present invention integrates clamping, current-carrying temperature rise, deformation measurement and environmental simulation functions into one, effectively solving the problems of equipment dispersion, repeated sample clamping, difficulty in conducting multi-item collaborative testing under current-carrying conditions and difficulty in conducting comprehensive performance evaluation under high and low temperature environments in the prior art.

[0027] In some embodiments of the present invention, such as Figure 1 As shown, the detection system also includes a controller 510 and an industrial computer 520. The controller 510 is connected to a surface-mount temperature sensor 420, a pin-type temperature sensor 430, an AC / DC power supply 410, and an environmental chamber. The industrial computer 520 is connected to the controller 510.

[0028] The controller 510 receives control commands from the industrial computer 520 and controls the environmental enclosure to switch between a specified temperature environment, a high-temperature environment, and a low-temperature environment according to the control commands, and controls the switching on and off of the AC / DC power supply 410. The controller 510 also acquires the surface temperature and internal temperature, and when the acquired surface temperature exceeds a first predetermined threshold or the acquired internal temperature exceeds a second predetermined threshold, the controller 510 cuts off the AC / DC power supply 410. The first and second predetermined thresholds are upper temperature limits preset according to the withstand limits of the pantograph sliding plate material or test safety standards. The controller 510 receives signals from two temperature sensors in real time and compares them with the corresponding thresholds. Once either temperature value exceeds the safe range, the controller 510 immediately issues a power-off command, cutting off the output of the AC / DC power supply 410. The controller 510 can be a programmable logic controller (PLC) or a microcontroller, which has the functions of signal reception, logic judgment, and execution control.

[0029] The industrial computer 520 sends control signals to the controller 510, causing the controller 510 to control the AC / DC power supply 410 to output a current of a predetermined intensity, and receives the surface temperature and internal temperature from the controller 510. The industrial computer 520 is also used to determine whether the current-carrying temperature rise characteristics of the pantograph slider meet requirements under the corresponding temperature environment, based on the rise of the surface temperature and internal temperature after a predetermined time of power supply from the AC / DC power supply 410, under conditions where the environmental chamber is in at least one of a specified temperature environment, a high temperature environment, or a low temperature environment. The industrial computer 520 is an industrial control computer (e.g., an industrial touch screen all-in-one computer) with powerful data processing and graphics display capabilities. Users can input test parameters and issue control commands through the human-machine interface of the industrial computer 520. The industrial computer 520 sends the commands to the controller 510 for execution, and simultaneously, the controller 510 transmits the collected sensor data back to the industrial computer 520 in real time. The industrial computer 520 stores and analyzes this data and displays it in real time on the display screen in the form of numbers, curves, or graphs.

[0030] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the clamping device includes a worktable 110, a sliding rail 120, a first support rod 211, a fixing member 212, a second support rod 221, and support rollers 222. The worktable 110 serves as the mounting base for the entire detection system, providing a stable mounting surface for all other components. The sliding rail 120 is disposed on the upper surface of the worktable 110. The sliding rail 120 can be in various forms, such as a linear guide, a V-shaped guide, or a T-slot guide, and its function is to guide the first support rod 211 and the second support rod 221 to move horizontally, ensuring the straightness and stability of the movement. In this embodiment, the sliding rail 120 is preferably a linear guide, which has the advantages of low friction and high positioning accuracy.

[0031] The bottom end of the first support rod 211 is slidably connected to the sliding rail 120. This means that the first support rod 211 can move freely along the extension direction of the sliding rail 120 to accommodate pantograph slides of different lengths. The first support rod 211 is a vertically arranged columnar structure, and its height can be adjusted as needed. The fixing member 212 is used to fix the top end of the first support rod 211 and the first end of the aluminum support 710. The fixing member 212 can take various forms, such as a bolt assembly that presses the first end of the aluminum support 710 against the top end of the first support rod 211 by tightening the bolt; or it can be a pneumatic quick clamp that achieves quick clamping through air pressure. The function of the fixing member 212 is to provide a stable and reliable clamping force to ensure that the first end of the aluminum support 710 of the pantograph slide remains stationary and does not shift during the test.

[0032] The bottom end of the second support rod 221 is slidably connected to the sliding rail 120. Similar to the first support rod 211, the second support rod 221 can also move freely along the sliding rail 120. The top end of the second support rod 221 is rotatably connected to the top end of the second support rod 221. Specifically, the support roller 222 can be mounted on a mounting seat at the top end of the second support rod 221 via bearings, thus allowing it to rotate freely about its own axis. The top end of the support roller 222 is movably connected to the second end of the aluminum support 710. This means that the second end of the aluminum support 710 rests on the support roller 222, and the two are not fixedly connected but in movable contact. When the pantograph slide plate undergoes extension deformation due to heat or force, the second end of the aluminum support 710 can move freely on the support roller 222, thereby releasing deformation stress and avoiding the influence of fixed constraints on the accuracy of deformation measurement results.

[0033] Furthermore, such as Figure 1 As shown, the deformation measuring device includes a first support 311, a vertical displacement sensor 313, a measuring plate 322, a rotating component 321, a second support 331, and a horizontal displacement sensor 332.

[0034] The bottom of the first support base 311 is set on the worktable 110 and located below the middle of the aluminum support 710. The first support base 311 is a vertically mounted bracket, which supports the vertical displacement sensor 313. The first support base 311 can be a fixed column or a height-adjustable support column.

[0035] A vertical displacement sensor 313 is connected to the first support base 311. The detection end of the vertical displacement sensor 313 is connected to the bottom of the middle part of the aluminum support 710, and is used to detect the flexural deformation of the pantograph sliding plate. The vertical displacement sensor 313 is a sensor capable of measuring linear displacement, and its measurement direction is vertical. The detection end of the sensor is in contact with the bottom of the middle part of the pantograph sliding plate aluminum support 710. For example, when the pantograph sliding plate is heated under current loading and undergoes downward bending deformation (i.e., flexing), the bottom of the middle part of the aluminum support 710 will move downward, and the vertical displacement sensor 313 can measure this displacement. The magnitude of this displacement directly reflects the pantograph sliding plate's resistance to flexural deformation.

[0036] The measuring plate 322 is rotatably connected to the second end of the aluminum support 710 via a rotating member 321. The measuring plate 322 is a flat plate component used to cooperate with the horizontal displacement sensor 332 for measurement. The rotating member 321 can be a hinge, a shaft, or a universal joint, etc. Through the connection of the rotating member 321, the measuring plate 322 can be rotated and adjusted relative to the second end of the aluminum support 710, thereby ensuring that the measuring plate 322 always remains perpendicular to the detection end of the horizontal displacement sensor 332.

[0037] The bottom of the second support 331 is mounted on the workbench 110 and is located on the outer side of the second end of the pantograph slide plate. The second support 331 is also a bracket for supporting the horizontal displacement sensor 332, and its specific position is on the side of the second end of the aluminum support 710 away from the first end.

[0038] A horizontal displacement sensor 332 is connected to the second support 331, and its detection end abuts against the measuring plate 322 to detect the extension deformation of the pantograph slide plate. The horizontal displacement sensor 332 is a sensor capable of measuring linear displacement in the horizontal direction. Its detection end abuts against the surface of the measuring plate 322. For example, when the pantograph slide plate is heated, its length increases, i.e., it undergoes extension deformation. Since the second end of the aluminum support 710 rests on the support roller 222, the extension of the pantograph slide plate will push the second end of the aluminum support 710 to move horizontally (away from the first end), thereby causing the measuring plate 322 to move horizontally. The displacement detected by the horizontal displacement sensor 332 is the extension deformation of the pantograph slide plate.

[0039] In this embodiment, the vertical displacement sensor 313 and the horizontal displacement sensor 332 can be differential transformer linear displacement sensors (LVDT), which have the advantages of high accuracy, good linearity and long life.

[0040] Furthermore, the deformation measuring device also includes a first lifting bracket 312, a second lifting bracket 334, and a linear module 333.

[0041] The vertical displacement sensor 313 is connected to the first support base 311 via a first lifting bracket 312. The first lifting bracket 312 can drive the vertical displacement sensor 313 to move up and down relative to the first support base 311. The first lifting bracket 312 can be a threaded lifting mechanism, a worm gear lifting mechanism, or a precision adjusting handwheel, etc. By moving the adjusting component of the first lifting bracket 312, the initial height position of the vertical displacement sensor 313 can be precisely adjusted, thereby adapting to pantograph slides of different thicknesses or with different initial vertical positions, ensuring that the vertical displacement sensor 313 can perform measurements with the optimal working stroke, and improving the versatility and accuracy of the measurement.

[0042] The horizontal displacement sensor 332 is connected to the second support base 331 via the second lifting bracket 334. The second lifting bracket 334 can move the horizontal displacement sensor 332 up and down relative to the second support base 331. The structure of the second lifting bracket 334 is similar to that of the first lifting bracket 312, and it is used to adjust the vertical position of the horizontal displacement sensor 332 so that its detection end can be aligned with the center area of ​​the measuring plate 322, ensuring measurement accuracy.

[0043] The second support 331 is connected to the worktable 110 via a linear module 333. The linear module 333 drives the second support 331 to move horizontally. The linear module 333 is a standardized component capable of linear motion, such as a ball screw linear module (manual or automatic), a synchronous belt linear module, or a pneumatic slide. The linear module 333 enables automatic or manual adjustment of the second support 331 and the horizontal displacement sensor 332 in the horizontal direction. This allows the horizontal displacement sensor 332 to be adjusted to the most suitable measurement position according to the actual length of the pantograph slide, thus adapting to pantograph slides of different models and lengths, further enhancing the versatility and flexibility of the detection system.

[0044] Furthermore, the controller 510 is also connected to a vertical displacement sensor 313 and a horizontal displacement sensor 332. The controller 510 is used to control the environmental enclosure to switch between a specified temperature environment, a high-temperature environment, and a low-temperature environment according to control commands from the industrial computer 520, and to control the on / off state of the AC / DC power supply 410. The controller 510 is also used to acquire flexural deformation and elongation deformation. That is, the controller 510 not only acquires temperature signals but also simultaneously acquires deformation signals, realizing unified management of multi-source signals.

[0045] The industrial computer 520 is used to determine whether the deformation of the pantograph contactor meets the requirements based on the received flexural and elongation deformation under specified temperature, high temperature, and low temperature environments, as well as the flexural and elongation deformation under AC / DC power supply 410 conditions and under AC / DC power supply 410 conditions. Specifically, the industrial computer 520 can compare the deformation differences of the pantograph contactor under different temperature conditions, and compare the deformation differences of the pantograph contactor under energized and de-energized conditions, thereby comprehensively evaluating the pantograph contactor's resistance to deformation under current-carrying conditions and different ambient temperatures.

[0046] In some embodiments of the present invention, such as Figure 1 , Figure 2 and Figure 3 As shown, the testing system also includes an airtightness testing device. The airtightness testing device includes an air source assembly 610 and an air intake assembly 620.

[0047] The air source assembly 610, arranged sequentially along the airflow direction, includes a filter 611, an air compressor 612, a condenser 613, a dryer 614, a pressure-stabilizing air reservoir 617, a safety valve 619, and a first check valve 618. The filter 611, air compressor 612, condenser 613, dryer 614, pressure-stabilizing air reservoir 617, safety valve 619, and first check valve 618 are connected sequentially via a first pipeline. The filter 611 is used to filter out solid particulate impurities from the air. The air compressor 612 is used to compress the air to provide the air source power. The condenser 613 and dryer 614 constitute an air-water separation system, used to remove moisture from the compressed air, preventing moisture from entering the pantograph slide plate ADD air passage (automatic pantograph lowering device air passage) and affecting testing accuracy or causing air passage corrosion, as well as protecting the various valve components in the pipeline. The pressure-stabilizing air reservoir 617 stores compressed air and stabilizes the output air pressure through its volumetric effect, eliminating pressure fluctuations caused by the pulsation of the air compressor 612 and ensuring a continuous and stable air pressure source. A safety valve 619 is installed on the pressure-stabilizing air reservoir 617 to automatically release pressure when the system pressure exceeds the safety limit, protecting the air circuit system. A first one-way valve 618 is installed downstream of the pressure-stabilizing air reservoir 617 to prevent backflow of downstream gas when the system stops or is depressurized. The air source assembly 610 can provide an adjustable air pressure within the range of 0~2.5MPa to meet the air pressure requirements under different test conditions.

[0048] The air intake assembly 620, along the airflow direction, includes, in sequence, a pressure reducing valve 621, an air flow meter 622, a first solenoid valve 623, a pressure buffer tank 626, and a second solenoid valve 629a. The pressure reducing valve 621, air flow meter 622, first solenoid valve 623, pressure buffer tank 626, and second solenoid valve 629a are connected sequentially via a second pipeline. The air intake end of the pressure reducing valve 621 is connected to the outlet end of the first one-way valve 618 via a third pipeline. The pressure reducing valve 621 is used to precisely reduce the high-pressure gas from the pressure-stabilized gas reservoir 617 to the working pressure required for the test, and can adjust the pressure to the maximum working gas pressure (e.g., 1 MPa) or minimum working gas pressure (e.g., 0.5 MPa) of the ADD. The air flow meter 622 is used to measure the gas flow rate through the pipeline in real time, providing crucial data for continuous flow testing. The first solenoid valve 623 acts as the main switch for the gas path, controlling the on / off state of the gas path. A pressure buffer tank 626 is located after the first solenoid valve 623 to further buffer the airflow, stabilize the pressure, and eliminate airflow impact caused by the operation of the solenoid valve. The output end of the second solenoid valve 629a is connected to the air inlet of the pantograph slide plate, thereby introducing the pressure-regulated, purified, and metered compressed air into the ADD air passage inside the pantograph slide plate.

[0049] Furthermore, such as Figure 3 As shown, the air source assembly 610 also includes a first pressure sensor 616 and a regeneration air reservoir 615. The detection end of the first pressure sensor 616 is connected to the first pipeline between the dryer 614 and the pressure-stabilizing air reservoir 617. This first pressure sensor 616 is used to monitor the gas pressure at the outlet of the dryer 614 and before it enters the pressure-stabilizing air reservoir 617 in real time. Its detection signal can be fed back to the controller 510 to control the start, stop, or frequency conversion adjustment of the air compressor 612, thereby realizing automatic closed-loop control of the air supply pressure, ensuring that the inlet pressure of the pressure-stabilizing air reservoir 617 is constant, and providing a continuous and stable air source for downstream applications. In addition, this pressure sensor can also be used to monitor the pressure difference before and after the dryer 614. When the pressure difference exceeds a set value, it prompts for replacement or regeneration of the desiccant, thus playing a role in monitoring the working status of the dryer 614.

[0050] The regeneration air reservoir 615 is connected to the dryer 614. The dryer 614 is typically filled with a desiccant such as a molecular sieve. After prolonged use, the desiccant becomes saturated and loses its drying capacity. The regeneration air reservoir 615 stores a portion of the dried gas processed by the dryer 614. When desiccant regeneration is required, the system valves are switched to reverse the flow of the dried gas in the regeneration air reservoir 615 through the dryer 614, carrying away the moisture adsorbed in the desiccant and discharging it through the exhaust port. This achieves in-situ regeneration of the dryer 614, restoring its drying capacity. This design ensures that the dryer 614 maintains good dehumidification performance over a long period, guaranteeing that the compressed air entering the pantograph sliding plate air passage is dry and clean, meeting the air source quality requirements for airtightness testing.

[0051] The intake assembly 620 also includes a second pressure sensor 627, a third solenoid valve 629b, a fourth solenoid valve 628, a second check valve 624, and a muffler 625.

[0052] The detection end of the second pressure sensor 627 is connected to the second pipeline between the pressure buffer tank 626 and the second solenoid valve 629a. The second pressure sensor 627 is located near the final output end of the pantograph slide air passage and is used to accurately monitor the working gas pressure finally applied to the pantograph slide ADD air passage.

[0053] The third solenoid valve 629b is connected to the pressure buffer tank 626, and its output is connected to the environmental chamber. This third solenoid valve 629b constitutes the second output branch of the airtightness testing device. When conducting airtightness tests in high-temperature, low-temperature, and specified-temperature environments, the entire device, or at least the pantograph slide plate itself, can be placed inside the environmental chamber. The outlet of the third solenoid valve 629b is connected to the ADD air inlet of the pantograph slide plate inside the chamber via a through-chamber pipe.

[0054] The fourth solenoid valve 628 connects to the second pipeline between the pressure buffer tank 626 and the first solenoid valve 623. The second check valve 624 connects to the output of the fourth solenoid valve 628. This second check valve 624 prevents external gas from entering the detection system. The fourth solenoid valve 628 is used to switch the gas path when rapid depressurization is required (e.g., after a test), allowing gas to be discharged through the second check valve 624 and the silencer 625.

[0055] The silencer 625 is connected to the output of the second one-way valve 624. When the airtightness pressure test is completed, when the sample needs to be replaced, or when the residual air pressure in the pipeline needs to be released, the compressed air in the pressure buffer tank 626 and the pipeline is safely, quickly, and quietly discharged into the atmosphere through the silencer 625 by operating the corresponding valve. This avoids the safety risks and airflow impact noise caused by disassembling the pipeline under pressure, ensures the personal safety of the operators, and improves the working environment.

[0056] Furthermore, in the airtightness testing mode: The industrial computer 520 is used to send a first control command to the controller 510. The controller 510 is used to control the environmental box to switch to a target temperature environment in a specified temperature environment, a high temperature environment, or a low temperature environment according to the first control command, control the first solenoid valve 623 and the second solenoid valve 629a to open, control the third solenoid valve 629b and the fourth solenoid valve 628 to close, and control the air compressor 612 to operate until the pressure detected by the first pressure sensor 616 reaches the first predetermined pressure.

[0057] The controller 510 is further configured to control the operation of the pressure reducing valve 621 until the pressure detected by the second pressure sensor 627 reaches a second predetermined pressure. The second predetermined pressure is the working pressure of the air tightness pressure holding test, which may be set as the maximum working air pressure of ADD (for example, 1MPa).

[0058] The controller 510 is further configured to close the first solenoid valve 623 and maintain the closed state for a predetermined period of time. At this time, the ADD air passage of the pantograph slide plate is isolated from the air source and enters a pressure holding state. After maintaining this state for a predetermined period of time (for example, 10 minutes), the gas pressure in the air passage is read and recorded by the second pressure sensor 627.

[0059] The industrial personal computer 520 is further configured to determine, according to the pressure change detected by the second pressure sensor 627 within the predetermined period of time in the target temperature environment, whether the air tightness of the pantograph slide plate in the target temperature environment meets the requirements. Specifically, by observing the drop range of the pressure during the pressure holding period, if the pressure drop value is within the allowable range, it is determined that the air tightness is qualified; if the pressure drop value exceeds the allowable range, it is determined that the air tightness is unqualified.

[0060] In the flow continuity detection mode: The industrial personal computer 520 is configured to send a second control instruction to the controller 510. The controller 510 is configured to, according to the second control instruction, control the environment box to switch to a target temperature environment among a specified temperature environment, a high temperature environment or a low temperature environment, control the first solenoid valve 623 and the second solenoid valve 629a to open, control the third solenoid valve 629b and the fourth solenoid valve 628 to close, and control the air pressure pump 612 to operate until the pressure detected by the first pressure sensor 616 reaches a third predetermined pressure.

[0061] The controller 510 is further configured to control the operation of the pressure reducing valve 621 until the pressure detected by the second pressure sensor 627 reaches a fourth predetermined pressure. The fourth predetermined pressure is the working pressure of the flow continuity test, which may be set as the minimum working air pressure of ADD (for example, 0.5MPa).

[0062] The industrial personal computer 520 is further configured to, when the sealing cock of the automatic pantograph lowering device is in an open state, determine whether the flow continuity of the pantograph slide plate in the target temperature environment meets the requirements according to the flow value detected by the air flow meter 622. When performing the flow continuity test, the ADD air passage of the pantograph slide plate is inflated to the minimum working air pressure through the air inlet assembly 620, then the sealing cock of the automatic pantograph lowering device is opened. At this time, the gas flows out from the end of the air passage of the pantograph slide plate, the flow value is measured and recorded in real time by the air flow meter 622, and it is determined whether the air passage is unobstructed and whether the flow continuity meets the requirements according to the flow rate.

[0063] Hereinafter, the detection method for the pantograph slide plate according to the embodiment of the present invention will be described.

[0064] This invention also provides a method for detecting a pantograph contactor, which employs the aforementioned pantograph contactor detection system. The method includes an environmental control step, a current-carrying temperature rise detection step, a deformation measurement step, an airtightness detection step, and a flow continuity detection step.

[0065] In the environmental control step, the control environment chamber provides at least one of a specified temperature environment, a high-temperature environment, or a low-temperature environment, ensuring that the pantograph contact plate is within the target temperature environment. The operator sends an environmental temperature setting command to the controller 510 via the human-machine interface of the industrial computer 520. The controller 510 then controls the temperature control system of the environment chamber according to the command, adjusting the temperature inside the chamber to the required test temperature. This step can be performed separately before current-carrying temperature rise detection, deformation measurement, airtightness testing, and flow continuity testing, ensuring that all tests are conducted within the target temperature environment.

[0066] In the current-carrying temperature rise detection step, under the target temperature environment, the AC / DC power supply 410 is controlled to output a current of a predetermined intensity with a predetermined polarity to acquire the surface temperature and internal temperature. Based on the rise in surface temperature and internal temperature after a predetermined time of power supply from the AC / DC power supply 410, it is determined whether the current-carrying temperature rise characteristics of the pantograph slide plate under the target temperature environment meet the requirements. Specifically, the operator first selects or inputs the required current parameters for the test through the human-machine interface of the industrial control computer 520, including the current type (AC / DC), current magnitude, and output polarity. The industrial control computer 520 converts these setting parameters into control commands and sends them to the controller 510. The controller 510 drives the AC / DC power supply 410 according to the commands, causing it to input current to the pantograph slide plate according to the predetermined current value, thereby simulating the current-carrying heating state of the pantograph slide plate during locomotive operation. The controller 510 simultaneously reads the signals from the patch temperature sensor 420 and the pin temperature sensor 430, processes these signals, converts them into temperature values, and reports them to the industrial control computer 520 in real time. The industrial computer 520 compares the temperature rise curve and the final steady-state temperature value with the preset judgment criteria to determine whether the current-carrying temperature rise characteristics are qualified.

[0067] In the deformation measurement step, under the target temperature environment, the flexural and elongation deformations of the pantograph slide are acquired. Based on the flexural and elongation deformations under AC / DC power supply 410 and without AC / DC power supply 410, it is determined whether the deformation of the pantograph slide under the target temperature environment meets the requirements. Specifically, the controller 510 synchronously reads the signals from the vertical displacement sensor 313 and the horizontal displacement sensor 332, processes the signals, converts them into displacement values, and reports them to the industrial control computer 520 in real time. The industrial control computer 520 calculates the deformation difference based on the flexural and elongation deformation data under two conditions: AC / DC power supply 410 (i.e., the pantograph slide is in a current-carrying heating state) and AC / DC power supply 410 without power supply (i.e., the pantograph slide is in a non-current-carrying heating state), thereby evaluating the pantograph slide's resistance to deformation under current-carrying conditions. Simultaneously, the industrial control computer 520 can also compare deformation data under different temperature environments to evaluate the deformation characteristics of the pantograph slide under different climatic conditions.

[0068] In the airtightness testing step, compressed air is introduced into the air passage of the pantograph slide plate under the target temperature environment and the pressure is maintained for a predetermined time. Based on the pressure change during the pressure maintenance period, it is determined whether the airtightness of the pantograph slide plate under the target temperature environment meets the requirements. Specifically, according to the instructions of the industrial computer 520, the controller 510 controls the first solenoid valve 623 and the second solenoid valve 629a to open, and starts the air compressor 612 to inflate the air passage of the pantograph slide plate to the working pressure of the airtightness test (e.g., 1 MPa). After the air pressure stabilizes, the controller 510 closes the first solenoid valve 623, isolating the air passage of the pantograph slide plate from the air source and entering the pressure maintenance state. After maintaining this state for a predetermined time (e.g., 10 minutes), the second pressure sensor 627 reads and records the gas pressure in the air passage, and the industrial computer 520 determines whether the airtightness is qualified based on the pressure drop.

[0069] In the flow continuity test step, compressed air is introduced into the air passage of the pantograph slide plate under the target temperature environment. With the sealing valve of the automatic pantograph lowering device in the open state, the flow rate detected by the air flow meter 622 is used to determine whether the flow continuity of the pantograph slide plate meets the requirements under the target temperature environment. Specifically, the controller 510, according to the instructions of the industrial computer 520, controls the first solenoid valve 623 and the second solenoid valve 629a to open, and starts the air compressor 612 to charge the air passage of the pantograph slide plate to the working pressure of the flow continuity test (e.g., 0.5MPa). Then, the operator opens the sealing valve of the automatic pantograph lowering device, at which point the gas flows out from the end of the air passage of the pantograph slide plate. The air flow meter 622 measures and records the flow rate in real time and reports it to the industrial computer 520. The industrial computer 520 determines whether the air passage is unobstructed and whether the flow continuity meets the requirements based on the flow rate.

[0070] This embodiment provides an automated testing method based on the aforementioned highly integrated testing system. The method has a clear process and is simple to operate. Test parameters can be set via a human-machine interface on an industrial control computer to automatically complete data acquisition and judgment for various tests, greatly simplifying the traditional complex testing process. This method makes it possible to simultaneously acquire data on the temperature rise, deformation, and airtightness of the pantograph contact plate under current-carrying conditions, providing an efficient and reliable technical means for comprehensively and accurately evaluating the overall performance of the pantograph contact plate under different temperature environments.

[0071] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection system for a pantograph sliding plate, the pantograph sliding plate comprising an aluminum support and a carbon strip disposed on the upper surface of the middle portion of the aluminum support, characterized in that, The detection system includes a clamping device, a current-carrying temperature rise device, a deformation measuring device, and an environmental chamber. The clamping device supports the pantograph contact plate, the deformation measuring device detects the deformation of the pantograph contact plate, and the environmental chamber can accommodate the pantograph contact plate and provide high-temperature, low-temperature, and specified-temperature environments. The current-carrying temperature rise device includes: A surface-mount temperature sensor is attached to the surface of the carbon strip and the aluminum support to detect surface temperature. A pin-type temperature sensor, wherein the measuring end of the pin-type temperature sensor extends into the interior of the pantograph plate to detect the internal temperature; An AC / DC power supply is provided, the output terminal of which is connected to the pantograph slide plate via a busbar. The AC / DC power supply is capable of outputting both AC and DC power, and the current intensity is adjustable. The output polarity of the AC / DC power supply is reversible, and the AC / DC power supply can automatically stop working under overcurrent or overvoltage conditions.

2. The pantograph sliding plate detection system according to claim 1, characterized in that, The detection system also includes: The controller is connected to the patch temperature sensor, the pin temperature sensor, the AC / DC power supply, and the environmental chamber. The controller is used to receive control commands from the industrial computer, control the environmental chamber to switch between a specified temperature environment, a high temperature environment, and a low temperature environment according to the control commands, and control the AC / DC power supply to switch on and off. The controller is also used to acquire the surface temperature and the internal temperature, and when the acquired surface temperature exceeds a first predetermined threshold or the acquired internal temperature exceeds a second predetermined threshold, the controller cuts off the AC / DC power supply. An industrial control computer is connected to the controller. The industrial control computer is used to send control signals to the controller so that the controller controls the AC / DC power supply to output a current of a predetermined intensity. The industrial control computer also receives the surface temperature and the internal temperature from the controller. The industrial control computer is further used to determine whether the current-carrying temperature rise characteristics of the pantograph sliding plate meet the requirements based on the rise of the surface temperature and the internal temperature after the AC / DC power supply has been powered for a predetermined time, when the environmental chamber is in at least one of a specified temperature environment, a high temperature environment, or a low temperature environment.

3. The pantograph sliding plate detection system according to claim 2, characterized in that, The clamping device includes: Workbench; A sliding rail is provided on the upper surface of the worktable; A first support rod and a fixing member, wherein the bottom end of the first support rod is slidably connected to the sliding rail, and the fixing member is used to fix the top end of the first support rod and the first end of the aluminum support. The second support rod and the support roller are provided. The bottom end of the second support rod is slidably connected to the sliding track, and the support roller is rotatably connected to the top end of the second support rod. The top end of the support roller is movably connected to the second end of the aluminum support.

4. The pantograph sliding plate detection system according to claim 3, characterized in that, The deformation measuring device includes: The first support base has its bottom disposed on the worktable and located below the middle of the aluminum support. A vertical displacement sensor is connected to the first support base, and the detection end of the vertical displacement sensor is connected to the bottom of the middle part of the aluminum support, for detecting the flexural deformation of the pantograph sliding plate; A measuring plate and a rotating component, wherein the measuring plate is rotatably connected to the second end of the aluminum support via the rotating component; The second support base is disposed on the workbench and located on the outside of the second end of the pantograph slide plate; A horizontal displacement sensor is connected to the second support base, and the detection end of the horizontal displacement sensor abuts against the measuring plate to detect the extension deformation of the pantograph sliding plate.

5. The pantograph sliding plate detection system according to claim 4, characterized in that, The deformation measuring device further includes: The first lifting bracket is connected to the first support base via the first lifting bracket, and the first lifting bracket can drive the vertical displacement sensor to move up and down relative to the first support base. The second lifting bracket is used to connect the horizontal displacement sensor to the second support base. The second lifting bracket can drive the horizontal displacement sensor to move up and down relative to the second support base. A linear module is provided, and the second support base is connected to the worktable via the linear module. The linear module is capable of driving the second support base to move horizontally.

6. The pantograph sliding plate detection system according to claim 5, characterized in that, The controller is also connected to the vertical displacement sensor and the horizontal displacement sensor. The controller is used to control the environmental chamber to switch between a specified temperature environment, a high temperature environment and a low temperature environment according to the control instructions from the industrial control computer, and to control the AC and DC power supply to be turned on and off. The controller is also used to acquire the flexural deformation and the extension deformation. The industrial control computer is used to determine whether the deformation of the pantograph sliding plate meets the requirements based on the received flexural deformation and extension deformation under specified temperature, high temperature and low temperature environments, as well as the flexural deformation and extension deformation under AC / DC power supply conditions and AC / DC power supply failure conditions.

7. The pantograph sliding plate detection system according to claim 6, characterized in that, The detection system further includes an airtightness testing device, which comprises: The air source assembly includes, in sequence along the airflow direction, a filter, an air compressor, a condenser, a dryer, a pressure-stabilizing air tank, a safety valve, and a first one-way valve. The filter, the air compressor, the condenser, the dryer, the pressure-stabilizing air tank, the safety valve, and the first one-way valve are connected in sequence through a first pipeline. The air intake assembly includes, in sequence along the airflow direction, a pressure reducing valve, an air flow meter, a first solenoid valve, a pressure buffer tank, and a second solenoid valve. The pressure reducing valve, the air flow meter, the first solenoid valve, the pressure buffer tank, and the second solenoid valve are connected in sequence via a second pipeline. The air intake end of the pressure reducing valve is connected to the air outlet end of the first one-way valve via a third pipeline. The output end of the second solenoid valve is used to communicate with the air inlet of the pantograph slide plate.

8. The pantograph sliding plate detection system according to claim 7, characterized in that, The air source component also includes: A first pressure sensor, the detection end of the first pressure sensor being connected to a first pipeline between the dryer and the pressure-stabilized gas storage tank; A regeneration gas storage tank, which is connected to the dryer; The intake assembly also includes: The second pressure sensor, the detection end of the second pressure sensor is connected to the second pipeline between the air pressure buffer tank and the second solenoid valve; The third solenoid valve is connected to the pressure buffer tank, and the output end of the third solenoid valve is used to connect to the environmental chamber. The fourth solenoid valve is connected to the second pipeline between the pressure buffer tank and the first solenoid valve; The second one-way valve is connected to the output end of the fourth solenoid valve; A silencer, which is connected to the output of the second one-way valve.

9. The pantograph sliding plate detection system according to claim 8, characterized in that, In airtightness testing mode: The industrial control computer is used to issue a first control command to the controller; The controller is used to control the environmental chamber to switch to the target temperature environment of a specified temperature environment, a high temperature environment, or a low temperature environment according to the first control command, control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve and the fourth solenoid valve to close, and control the air compressor to operate until the pressure detected by the first pressure sensor reaches the first predetermined pressure. The controller is also used to control the operation of the pressure reducing valve until the pressure detected by the second pressure sensor reaches the second predetermined pressure. The controller is also used to close the first solenoid valve and maintain the closed state for a predetermined time; The industrial control computer is also used to determine whether the airtightness of the pantograph sliding plate meets the requirements under the target temperature environment based on the pressure change detected by the second pressure sensor within the predetermined time under the target temperature environment. In the flow continuity detection mode: The industrial control computer is used to issue a second control command to the controller; The controller is used to control the environmental chamber to switch to the target temperature environment of a specified temperature environment, a high temperature environment, or a low temperature environment according to the second control command, control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve and the fourth solenoid valve to close, and control the air compressor to operate until the pressure detected by the first pressure sensor reaches the third predetermined pressure. The controller is also used to control the operation of the pressure reducing valve until the pressure detected by the second pressure sensor reaches a fourth predetermined pressure. The industrial control computer is also used to determine, based on the flow rate value detected by the air flow meter, whether the flow continuity of the pantograph sliding plate meets the requirements under the target temperature environment when the sealing valve of the automatic pantograph lowering device is in the open state.

10. A method for detecting a pantograph sliding plate, characterized in that, The detection system for the pantograph sliding plate as described in claim 8 or 9, wherein the detection method includes: Environmental control steps: The control environment box provides at least one of a specified temperature environment, a high temperature environment, or a low temperature environment, so that the pantograph sliding plate is in the target temperature environment; Current-carrying temperature rise detection steps: Under the target temperature environment, control the AC / DC power supply to output a current of a predetermined intensity with a predetermined polarity, obtain the surface temperature and internal temperature, and determine whether the current-carrying temperature rise characteristics of the pantograph slide plate under the target temperature environment meet the requirements based on the rise of the surface temperature and the internal temperature after the AC / DC power supply has been powered for a predetermined time. Deformation measurement steps: Under the target temperature environment, obtain the flexural deformation and extension deformation of the pantograph sliding plate. Based on the flexural deformation and extension deformation under AC / DC power supply conditions and under AC / DC power supply unsupply conditions, determine whether the deformation of the pantograph sliding plate under the target temperature environment meets the requirements. Air tightness test steps: Under the target temperature environment, compressed air is introduced into the air passage of the pantograph sliding plate and the pressure is maintained for a predetermined time. Based on the pressure change during the pressure maintenance period, it is determined whether the air tightness of the pantograph sliding plate under the target temperature environment meets the requirements. Flow continuity testing steps: Under the target temperature environment, compressed air is introduced into the air passage of the pantograph slide plate. With the sealing valve of the automatic pantograph lowering device in the open state, the flow continuity of the pantograph slide plate under the target temperature environment is determined based on the flow rate value detected by the air flow meter.

Images