Transponder testing device, system and method considering complex medium and environment

Abstract

The invention relates to the technical field of transponder testing, in particular to a transponder testing device, system and method considering complex media and environments, and the testing device comprises a testing box body, a vacuum pump arranged on the outer wall of the testing box body, and a heater, an evaporator and a humidifier which are arranged in the testing box body, the suction end of the vacuum pump is communicated with the inner cavity of the test box body; the vibration table is arranged in the test box body, the transponder is arranged on the vibration table, the test window is arranged at the upper end of the test box body, the ultraviolet lamp is arranged on the inner wall of the test box body, the air blower is arranged in the test box body, the partition plate is arranged in the test box body, and the circulating air ports are formed in the upper end and the lower end of the partition plate respectively. The inner cavity of the test box body is divided into a test chamber and an equipment chamber which are adjacent front and back by virtue of a partition plate, and the test window corresponds to the transponder. According to the invention, the test of the transponder in a complex environment can be satisfied, the test is more in line with the actual situation, and the test result is more accurate.

Description

Technical Field

[0001] This invention relates to the field of transponder testing technology, and more specifically to a transponder testing apparatus, system, and method that takes into account complex media and environments. Background Technology

[0002] Transponder products have been widely used in high-speed railways and urban rail transit to realize one-way communication between the ground and the train. The transponder provides fixed and variable train control information to the on-board transponder information receiving unit and antenna.

[0003] The transponder is mounted on a sleeper at the center of the rail, either horizontally or vertically, and is a power-free device. When a train passes, the transponder is activated by an energy signal emitted by the onboard antenna, sending its stored message data to the onboard antenna, which in turn transmits it to the BTM host. The BTM host decodes the message signal and transmits the decoded data to the relevant train control equipment, such as ATP (Automatic Train Protection) equipment or LKJ (Low-Kill Junction) equipment, according to relevant protocols.

[0004] Transponders are typically located in outdoor environments, where the climate and surface debris can affect their transmission performance. When a train passes, this debris lies between the transponder's surface and the station antenna, and is therefore referred to as the medium. Current transponder product testing focuses on verifying performance parameters under single climatic conditions or single media conditions. However, railway transportation operations often involve a combination of complex conditions. While existing transponder products can pass individual environment and single medium tests, they are prone to failure in the complex real-world environment, resulting in a high failure rate. Therefore, improving the similarity between laboratory testing environments and railway transportation sites through comprehensive climatic and multi-medium simulations is a crucial technological challenge.

[0005] Current technologies for single-environment testing primarily focus on temperature, humidity, and vibration. However, air pressure and solar radiation are significant environmental factors that cannot be ignored. For example, in the high-altitude railway environment, high altitude, low air pressure, and strong solar radiation are representative application conditions. Therefore, in addition to simulating environmental conditions such as temperature, humidity, and vibration, simulating air pressure and solar radiation is also a problem that needs to be addressed in testing. Summary of the Invention

[0006] To address the technical problem that current transponder products can only be tested under a single environmental condition or a single cluttered environment, this invention provides a transponder testing device, system, and method that considers complex media and environments. This allows for testing the performance and lifespan of transponder products in complex real-world environments, resulting in more accurate test results and further improving the safety of transponder use.

[0007] The technical solution adopted by the present invention is to provide a transponder testing device that takes into account complex media and environments, including a test chamber, a vacuum pump installed on the outer wall of the test chamber, a heater, an evaporator and a humidifier installed inside the test chamber, wherein the suction end of the vacuum pump is connected to the inner cavity of the test chamber, and further includes a vibration table installed inside the test chamber, a transponder installed on the vibration table, a test window installed at the upper end of the test chamber, an ultraviolet lamp installed on the inner wall of the test chamber, a blower installed inside the test chamber, a partition installed inside the test chamber, and circulating air vents installed at the upper and lower ends of the partition respectively; The inner cavity of the test chamber is divided into a front-to-back test chamber and an equipment chamber by a partition. The vibration table is set inside the test chamber. The test window corresponds to the transponder. The vacuum pump extraction end is connected to the test chamber. The ultraviolet lamp is set on the inner wall of the test chamber and corresponds to the transponder. The heater, evaporator and humidifier are set inside the equipment chamber. The blower is set at the upper or lower end of the equipment chamber. The partition is connected to the test chamber by a circulating air vent.

[0008] The test chamber is equipped with a vent valve at the top, and one end of the vent valve is connected to the test chamber; an operation port is provided on one side of the test chamber, and an opening and closing door is provided on the operation port; a lighting lamp is provided on the inner wall of the test chamber, and the lighting lamp is located inside the test chamber.

[0009] The upper end of the vibration table is provided with a limiting fixture and a medium fixture provided on the vibration table and located within the limiting fixture. The limiting fixture includes limiting blocks provided on the four corners of the upper end of the vibration table. The limiting blocks have an L-shaped structure and the openings face inward. The media fixture includes a liquid media fixture or a solid media fixture; The liquid medium tooling includes a liquid medium tank, an injection port located at the upper end of the liquid medium tank, a clearance groove located at the lower end of the liquid medium tank, and filling boxes embedded at both ends of the clearance groove. The clearance groove has a through-groove structure with openings at both ends. The clearance groove corresponds to and is adapted to the transponder at the upper end of the vibration table. There are two filling boxes, which are embedded in the clearance groove and located at both ends of the transponder. The solid medium fixture includes a solid medium housing, a medium tank located at the upper end of the solid medium housing, and a clearance slot located at the lower end of the solid medium housing. The clearance slot corresponds to and is adapted to the transponder, and the medium tank corresponds to the transponder.

[0010] The upper end of the vibration table is provided with a test fixture, which includes a pad, a baffle that is respectively provided on the upper side of both ends of the pad and protruding upwards, a limiting groove that is respectively provided on the lower side of both ends of the pad, a padding groove provided in the middle of the upper end of the pad, a fixing hole provided in the padding groove, and an operating groove provided in the middle of the lower end of the pad. The baffle and the limiting groove correspond to and are adapted to each other. The padding groove and the operating groove are both through groove structures with one side open.

[0011] A test system for a transponder test device considering complex media and environments includes a central controller, a negative pressure module, a heating module, a cooling module, a humidification module, a vibration module, a solar radiation module, a radio frequency energy signal generation module, and an uplink signal acquisition and analysis module, all connected to the central controller. The negative pressure module controls the vacuum pump, the heating module controls the heater, the cooling module controls the evaporator, the humidification module controls the humidifier, the vibration module controls the vibration table, the solar radiation module controls the ultraviolet lamp, the radio frequency energy signal generation module sends radio frequency energy signals to the transponder, the uplink signal acquisition and analysis module acquires and identifies the uplink signals emitted by the transponder, and the central controller receives control feedback signals from each module to monitor and record the real-time status of the test environment.

[0012] The radio frequency energy signal generation module includes a signal generator, a power amplifier, an attenuator, and a transmitting loop antenna. The output terminal of the signal generator is electrically connected to the input terminal of the power amplifier, the output terminal of the power amplifier is connected to the input terminal of the attenuator, and the output terminal of the attenuator is connected to the input terminal of the transmitting loop antenna.

[0013] The uplink signal acquisition and analysis module includes an acquisition loop antenna, a signal filtering circuit, an A / D sampling and gain acquisition circuit, a signal amplitude detection module, a signal rate detection module, a signal frequency detection module, a signal conditioning and decoding module, and an analysis result display and recording module. The output terminal of the acquisition loop antenna is electrically connected to the input terminal of the signal filtering circuit, the output terminal of the signal filtering circuit is electrically connected to the input terminal of the A / D sampling and gain acquisition circuit, the output terminal of the A / D sampling and gain acquisition circuit is electrically connected to the input terminals of the signal amplitude detection module, the signal rate detection module, the signal frequency detection module, and the signal conditioning and decoding module, respectively, and the input terminal of the analysis result display and recording module is electrically connected to the output terminals of the signal amplitude detection module, the signal rate detection module, the signal frequency detection module, and the signal conditioning and decoding module, respectively.

[0014] A test method for a transponder test apparatus that takes into account complex media and environments includes the following steps: S1. Based on the requirements of the transponder test environment, a suitable test environment is provided by setting up a test device, including one or more of the following: negative pressure environment, high temperature or low temperature environment, humid environment, liquid or solid medium coverage, solar radiation environment, and vibration environment. S2. Periodically send excitation signals to the transponders located in the test device, and the activated transponders periodically send uplink signals. S3. Receive the uplink signal sent by the transponder and analyze and judge it by Fast Fourier Transform (FFT), including message compliance, center frequency, frequency offset, average data rate, jitter and maximum time interval error. S4. Set the threshold values ​​for transponder 7 parameters to determine the performance and lifespan of transponder 7.

[0015] The beneficial effects of this invention are: 1. The testing apparatus, system and method of the present invention can provide different combinations of environments for transponder testing, simulating the real working environment of field transponders in a laboratory environment.

[0016] 2. The testing device, system and method of the present invention enable transponders with problems in the railway field to reproduce the problems in the laboratory, providing technical support for locating product defects.

[0017] 3. By decoding and analyzing the transponder signal through the uplink signal acquisition and analysis module, the amplitude and signal characteristic indicators of the transponder signal are analyzed, providing technical support for determining the environmental boundary conditions of transponder products, design and development, experimental verification, inspection and testing, and safe operation and maintenance.

[0018] 4. By increasing the frequency of vehicle traffic signals and the rate of change of temperature, humidity, and air pressure, the environmental conditions of the transponder are simulated to change more rapidly in the laboratory, thereby accelerating the aging process and providing technical support for predicting the lifespan of transponder products. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cross-section of the present invention; Figure 2 This is a schematic diagram of the structure of the vibration table and the liquid medium tank combined in this invention; Figure 3 This is a schematic diagram of the liquid medium tank and filling tank in this invention; Figure 4 This is a schematic diagram of the structure of the vibration table and solid medium box combined in this invention; Figure 5 This is a schematic diagram of the solid medium box in this invention, viewed from below. Figure 6 This is a schematic diagram of the structure of the vibration table and transponder combined in this invention; Figure 7 This is a schematic diagram of the transponder test fixture in this invention; Figure 8 This is a system block diagram of the testing system in this invention; Figure 9 This is a flowchart illustrating the testing method in this invention.

[0020] In the attached diagram, 1 is the test chamber, 2 is the vacuum pump, 3 is the heater, 4 is the evaporator, 5 is the humidifier, 6 is the vibration table, 7 is the transponder, 8 is the test window, 9 is the ultraviolet lamp, 10 is the blower, 11 is the partition, 12 is the test chamber, 13 is the equipment chamber, 14 is the vent valve, 15 is the switch door, 16 is the lighting lamp, 17 is the limit stop, 18 is the liquid medium tank, 19 is the liquid injection port, 20 is the clearance groove, 21 is the filling tank, 22 is the solid medium tank, 23 is the medium tank, 24 is the clearance groove, 25 is the pad, 26 is the baffle, 27 is the limit groove, 28 is the padding groove, and 29 is the operation groove. Detailed Implementation

[0021] like Figure 1-7 As shown, the present invention provides a transponder testing device considering complex media and environments, including a test chamber 1, a vacuum pump 2 disposed on the outer wall of the test chamber 1, a heater 3 disposed inside the test chamber 1, an evaporator 4, and a humidifier 5. The suction end of the vacuum pump 2 is connected to the inner cavity of the test chamber 1. It also includes a vibration table 6 disposed inside the test chamber 1, a transponder 7 disposed on the vibration table 6, a test window 8 disposed at the upper end of the test chamber 1, an ultraviolet lamp 9 disposed on the inner wall of the test chamber 1, a blower 10 disposed inside the test chamber 1, and a partition 11 disposed inside the test chamber 1. The test chamber 1 has circulating air vents at the top and bottom of the partition 11; the inner cavity of the test chamber 1 is divided into a test chamber 12 and an equipment chamber 13 by means of the partition 11; the vibration table 6 is set inside the test chamber 1; the test window 8 corresponds to the transponder 7; the vacuum pump 2 is connected to the test chamber 12 at its extraction end; the ultraviolet lamp 9 is set on the inner wall of the test chamber 12 and corresponds to the transponder 7; the heater 3, evaporator 4 and humidifier 5 are set inside the equipment chamber 13; the blower 10 is set at the top or bottom of the equipment chamber 13; and the partition 11 is connected to the test chamber 12 by means of circulating air vents.

[0022] Test chamber 1 is a chamber with a sealed inner cavity. A vacuum pump 2, installed on the outer wall of test chamber 1, evacuates the inner cavity, changing the pressure from positive to negative, providing a negative pressure testing environment for transponder 7. A heater 3 is installed inside test chamber 1; activating heater 3 heats the inner cavity, providing a high-temperature testing environment for transponder 7. An evaporator 4 cools the inside of test chamber 1, providing a low-temperature testing environment for transponder 7. A humidifier 5 humidifies the inside of test chamber, providing a humidity testing environment for transponder 7. The conventional structural layout of the circuits, pipes, valves, etc., of the vacuum pump 2, heater 3, evaporator 4, and humidifier 5 is not limited, as long as the functionality is achieved.

[0023] The transponder 7 is fixed on the vibration table 6, which is installed inside the test chamber 1. Starting the vibration table 6 provides a vibration test environment for the transponder 7. The ultraviolet lamp 9 can irradiate the transponder 7 on the vibration table 6, providing a solar radiation test environment for the transponder 7.

[0024] The inner cavity of the test chamber 1 is divided into two adjacent chambers, either front-to-back or left-to-right, by a partition 11: a test chamber 12 and an equipment chamber 13. The equipment chamber 13 provides space for installing the heater 3, evaporator 4, and humidifier 5, while the test chamber 12 is used to install the vibration table 6 and provides testing space for the transponder 7. Circulation vents (not shown in the figure) are provided at the upper and lower ends of the partition 11. A blower 10 within the equipment chamber 13 allows airflow within the test chamber 1 to circulate between the two chambers, resulting in more uniform heating, humidification, or cooling, and higher efficiency.

[0025] Test window 8 is located at the top of test chamber 1 and corresponds to transponder 7 on vibration table 6. Test window 8 is enclosed by a transparent non-metallic plate, such as a transparent plastic plate. During testing, a control module with a vehicle-mounted antenna is set above test window 8 to activate and receive transponder 7, thereby realizing signal testing of transponder 7.

[0026] like Figure 1 As shown, a vent valve 14 is provided at the upper end of the test chamber 1, and one end of the vent valve 14 is connected to the test chamber 12; an operation port is provided on one side of the test chamber 1, and an opening and closing door 15 is provided on the operation port; a lighting lamp 16 is provided on the inner wall of the test chamber 1, and the lighting lamp 16 is located inside the test chamber 12.

[0027] Vent valve 14 is a vent valve connecting the inner cavity of test chamber 1, used to allow air intake, exhaust, and exchange within test chamber 1. The switch door 15 is made of transparent material and can be opened and closed, facilitating observation and manual operation by testing personnel. Lighting lamp 16 provides a light source for the inner cavity of test chamber 1, facilitating observation by testing personnel.

[0028] like Figure 1-6 As shown, the upper end of the vibration table 6 is provided with a limiting fixture and a medium fixture provided on the vibration table 6 and located within the limiting fixture. The limiting fixture includes limiting blocks 17 provided on the four corners of the upper end of the vibration table 6. The limiting blocks 17 have an L-shaped structure and the opening faces inward. The media fixture includes a liquid media fixture or a solid media fixture; The liquid medium tooling includes a liquid medium tank 18, an injection port 19 located at the upper end of the liquid medium tank 18, a clearance groove 20 located at the lower end of the liquid medium tank 18, and filling boxes 21 embedded at both ends of the clearance groove 20. The clearance groove 20 has a through groove structure with openings at both ends. The clearance groove 20 corresponds to and is adapted to the transponder 7 at the upper end of the vibration table 6. There are two filling boxes 21, which are respectively embedded in the clearance groove 20 and located at both ends of the transponder 7. The solid medium fixture includes a solid medium housing 22, a medium tank 23 disposed at the upper end of the solid medium housing 22, and a clearance slot 24 disposed at the lower end of the solid medium housing 22. The clearance slot 24 corresponds to and is adapted to the transponder 7, and the medium tank 23 corresponds to the transponder 7.

[0029] The limiting blocks 17 are used to limit the liquid or solid medium tooling. The four L-shaped limiting blocks 17 located at the four corners of the vibration table 6 form a frame structure. The liquid or solid medium tooling is placed between the limiting blocks 17 without the need for further fixation, which facilitates the replacement of the liquid or solid medium tooling.

[0030] The liquid medium tank 18 is a tank structure with an internal cavity. A test liquid medium, such as water, can be injected through the injection port 19 at its upper end. The clearance groove 20 is the location of the transponder 7. After the liquid medium tank 18 is placed between the upper limit stops 17 of the vibration table 6, the transponder 7 is positioned within the clearance groove 20, without obstructing the lower end of the liquid medium tank 18 from contacting the surface of the vibration table 6. The filling tank 21 can slide and embed into both ends of the clearance groove 20, located at both ends of the transponder 7, enabling the transponder 7 to be covered with liquid medium around its sides and top. The liquid medium is selected according to the testing requirements.

[0031] The solid medium tank 22 is a box structure with an inner cavity. The inner cavity is an annular structure surrounding the medium tank 23 and the avoidance groove 24. There is no inner cavity between the medium tank 23 and the avoidance groove 24, and it corresponds to the upper end of the transponder 7. The medium tank 23 corresponds to the upper end of the transponder 7 in terms of position and size. The installation method of the solid medium tank 22 is the same as that of the liquid medium tank 18, but only one can be used. Its size is adapted to the inner space after the limiting block 17 is placed on the vibration table 6. Between, the transponder 7 on the vibration table 6 is located in the avoidance groove 24. The annular inner cavity of the solid medium box 22 is filled with solid medium, such as crushed ore. After the solid medium box 22 is placed, the crushed ore surrounds the transponder 7. At this time, the upper end of the transponder 7 corresponds to the medium groove 23 at the upper end of the solid medium box 22, and there is no ore covering it. Finally, crushed ore is added to the medium groove 23. The medium groove 23 can easily adjust the thickness of the crushed ore covering and can easily add a curing agent to prevent the crushed ore from falling out of the medium groove 23 during vibration.

[0032] like Figure 6 , 7 As shown, the upper end of the vibration table 6 is provided with a test fixing frame. The test fixing frame includes a pad 25, baffles 26 respectively provided on the upper sides of both ends of the pad 25 and protruding upwards, limiting grooves 27 respectively provided on the lower sides of both ends of the pad 25, padding groove 28 provided in the middle of the upper end of the pad 25, fixing holes 30 provided in the padding groove 28, and operating groove 29 provided in the middle of the lower end of the pad 25. The baffles 26 correspond to and are adapted to the limiting grooves 27. The padding groove 28 and the operating groove 29 are both through groove structures with one side open.

[0033] The test mounting bracket is used to install and fix the transponder 7. It is stackable, and the pads 25 can be stacked according to the height requirements of the transponder 7 for easy height adjustment. The stops 26 and limiting grooves 27 of the pads 25 correspond and fit together, facilitating positioning and limiting during stacking. A soft rubber pad can be added to the padding groove 28 to cushion the transponder 7 and increase friction. The operating groove 29 is located at the lower end of the pad 25 and corresponds to the fastening screw hole. When the transponder 7 is fixed with bolts, it is convenient to insert a wrench to limit one end of the bolt, making it easier for the tester to fix the transponder 7. In use, two sets of pads 25 are used at intervals, with both ends of the transponder 7 resting on the two sets of pads 25 respectively for greater stability.

[0034] See appendix Figure 7In one embodiment, three fixing holes 30 are provided on the vibration table 6. Through holes or screw holes are provided on the vibration table 6 corresponding to the two fixing holes at both ends. The bolt is inserted into the through hole or screw hole of the vibration table 6 from the upper end of the pad 25 and tightened. The upper end of the bolt is recessed into the pad groove 28 to make the upper end of the pad 25 flat, which facilitates the fixing of the transponder 7. After adding the rubber pad, the transponder 7 is placed on the pad 25, and the bolt is inserted into the middle fixing hole from the through hole on the transponder 7. The locking nut at the lower end of the bolt is inserted from the position of the operating groove 29 and tightened by a wrench.

[0035] like Figure 8 As shown, the present invention provides a test system for a transponder test device that takes into account complex media and environments, including a central controller, a negative pressure module, a heating module, a cooling module, a humidification module, a vibration module, a solar radiation module, a radio frequency energy signal generation module, and an uplink signal acquisition and analysis module, all connected to the central controller. The negative pressure module controls the vacuum pump 2, the heating module controls the heater 3, the cooling module controls the evaporator 4, the humidification module controls the humidifier 5, the vibration module controls the vibration table 6, the solar radiation module controls the ultraviolet lamp 9, the radio frequency energy signal generation module sends radio frequency energy signals to the transponder 7, the uplink signal acquisition and analysis module acquires and identifies the uplink signals emitted by the transponder 7, and the central controller receives the control feedback signals from each module to monitor and record the real-time status of the test environment.

[0036] During use, the central controller sends control commands to the negative pressure module, heating module, cooling module, humidification module, vibration module, solar radiation module, radio frequency energy signal generation module, and uplink signal acquisition and analysis module. Testers input commands to the central controller according to the test environment requirements to control one or more of the negative pressure module, heating module, cooling module, humidification module, vibration module, solar radiation module, radio frequency energy signal generation module, and uplink signal acquisition and analysis module to provide a test environment for transponder 7. The central controller records the condition parameters of the test environment in real time and sends them to the analysis result display and recording module for displaying, recording, and analyzing the test environment conditions.

[0037] like Figure 8 As shown, the radio frequency energy signal generation module includes a signal generator, a power amplifier, an attenuator, and a transmitting loop antenna. The output terminal of the signal generator is electrically connected to the input terminal of the power amplifier, the output terminal of the power amplifier is connected to the input terminal of the attenuator, and the output terminal of the attenuator is connected to the input terminal of the transmitting loop antenna.

[0038] The radio frequency energy signal generation module can simulate the dynamic energy signal received by a transponder 7 when a train passes by at any speed from 10km / h to 500km / h. It can also continuously send radio frequency energy signals to simulate a train passing by at low speed or standing still above the transponder 7.

[0039] The operating mode of the radio frequency energy signal generation module can be controlled by the central controller. Using the technology of timed control of the power amplifier switch, when it is turned on, it sends a 27.095MHz radio frequency energy signal to the transponder 7. After receiving the 27.095MHz signal, the transponder 7 starts to enter the working state and sends uplink signals. When it is turned off, the radio frequency energy signal generation module stops sending the 27.095MHz energy signal to the transponder 7.

[0040] For example, sending a radio frequency energy signal to transponder 7 at 18.1ms trapezoidal wave intervals of 2s is equivalent to a train passing by at 100km / h at 2s intervals on a railway site. By changing the pulse width and frequency of the trapezoidal wave, it is possible to simulate trains passing by transponder 7 at different speeds and quickly bring transponder 7 to its theoretical working life threshold.

[0041] like Figure 8 As shown, the uplink signal acquisition and analysis module includes an acquisition loop antenna, a signal filtering circuit, an A / D sampling and gain acquisition circuit, a signal amplitude detection module, a signal rate detection module, a signal frequency detection module, a signal conditioning and decoding module, and an analysis result display and recording module. The output terminal of the acquisition loop antenna is electrically connected to the input terminal of the signal filtering circuit, the output terminal of the signal filtering circuit is electrically connected to the input terminal of the A / D sampling and gain acquisition circuit, the output terminal of the A / D sampling and gain acquisition circuit is electrically connected to the input terminals of the signal amplitude detection module, the signal rate detection module, the signal frequency detection module, and the signal conditioning and decoding module, respectively, and the input terminal of the analysis result display and recording module is electrically connected to the output terminals of the signal amplitude detection module, the signal rate detection module, the signal frequency detection module, and the signal conditioning and decoding module, respectively.

[0042] The acquisition loop antenna is used to receive the uplink signal emitted by the transponder 7. The signal filtering circuit is used to remove noise and interference from the uplink signal, control and improve signal quality. The A / D sampling and gain acquisition circuit is used to convert the analog signal into a digital signal, and amplify and adjust the signal for subsequent processing and analysis. The signal amplitude detection module, signal rate detection module, signal frequency detection module, signal conditioning and decoding module are used to analyze the uplink signal. The analysis result display and recording module is used to display and record the analyzed uplink signal data.

[0043] The uplink signal acquisition and analysis module can analyze the power of the signal emitted by transponder 7, the center frequency and frequency offset of the signal, the average data rate, the maximum time interval error, and the signal bandwidth through Fast Fourier Transform (FFT).

[0044] The central controller can control the operating mode of the uplink signal acquisition and analysis module, selectively testing one or more parameters such as the power of the signal emitted by transponder 7, the signal center frequency and frequency offset, average data rate, maximum time interval error, and signal bandwidth. Based on the parameter thresholds, the performance and lifespan of transponder 7 can be determined.

[0045] The central controller can control the working mode combination of the radio frequency energy signal generation module and the uplink signal acquisition and analysis module. For example, every 100 times the trapezoidal wave signal is sent, the uplink signal sent by the last transponder 7 is acquired, thereby analyzing the impact of the number of activations on the performance of transponder 7.

[0046] This invention, through the combined use of a testing device and system, can simulate the action of a train passing and activating the transponder 7, i.e., the actual working state of the transponder 7. This method can be used to test the product lifespan of the transponder 7.

[0047] Taking the Beijing-Shanghai Railway as an example, transponder 7 on the main line is activated a maximum of 152 times per day. Using the testing device and system of this invention, the radio frequency energy signal generation module can be set to send a train passing signal every 2 seconds, with a signal duration of 18.1ms, simulating a train passing transponder 7 at a speed of 100km / h. Therefore, transponder 7 can be activated approximately 39,200 times per day, equivalent to transponder 7 operating on the Beijing-Shanghai Railway for 204 days.

[0048] like Figure 9 As shown, the present invention provides a test method for a transponder test apparatus that takes into account complex media and environments, comprising the following steps: S1. Based on the test environment requirements of transponder 7, a suitable test environment is provided by setting up a test device, including one or more of the following: negative pressure environment, high temperature or low temperature environment, humid environment, liquid or solid medium coverage, solar radiation environment, and vibration environment. S2. Periodically send excitation signals to transponder 7 located in the test device, and the activated transponder 7 periodically sends uplink signals. S3. Receive the uplink signal sent by the transponder 7, and analyze and judge it by Fast Fourier Transform (FFT), including message conformity, center frequency, frequency offset, average data rate, jitter and maximum time interval error. S4. Set the parameter thresholds for transponder 7 to determine its performance and lifespan. The parameter thresholds include the signal parameter thresholds for transponder 7 and the corresponding performance parameter thresholds for transponder 7 itself.

[0049] The testing apparatus, system, and method of the present invention can simulate the real environment of the transponder 7 in actual use. By sending a train passing signal to the transponder 7 through the radio frequency energy transmission module, the real situation of the train passing and activating the transponder 7 can be simulated. The activation cycle and activation number of the transponder 7 can be controlled, and the lifespan of the transponder 7 can be tested in a short time.

[0050] The complex media of this invention include, but are not limited to, liquid and solid media, as well as specific viscous liquids, powders, and semi-solid mixtures. Tests under these media can be performed using the aforementioned two types of media fixtures. This media will more comprehensively simulate the working environment of railway sites, such as coal dust on coal transport lines and iron filings and ore on mining lines. Combined with environmental condition simulation, various railway site application scenarios can be simulated, such as low-temperature, high-humidity coal dust media corresponding to the winter freight scenario in southern China, or low-temperature, low-pressure, high-solar radiation media corresponding to the application scenario of plateau railways. This scenario simulation can be used to study the synergistic effect between the media and specific environmental stresses.

Claims

1. A transponder testing apparatus considering complex media and environments, comprising a test chamber (1), a vacuum pump (2) disposed on the outer wall of the test chamber (1), a heater (3), an evaporator (4), and a humidifier (5) disposed inside the test chamber (1), wherein the suction end of the vacuum pump (2) is connected to the inner cavity of the test chamber (1), characterized in that: It also includes a vibration table (6) installed in the test chamber (1), a transponder (7) installed on the vibration table (6), a test window (8) installed at the upper end of the test chamber (1), an ultraviolet lamp (9) installed on the inner wall of the test chamber (1), a blower (10) installed in the test chamber (1), and a partition (11) installed in the test chamber (1), and circulating air vents installed at the upper and lower ends of the partition (11); The inner cavity of the test chamber (1) is divided into a test chamber (12) and an equipment chamber (13) by means of a partition (11). The vibration table (6) is set inside the test chamber (1). The test window (8) corresponds to the transponder (7). The vacuum pump (2) is connected to the test chamber (12) at its extraction end. The ultraviolet lamp (9) is set on the inner wall of the test chamber (12) and corresponds to the transponder (7). The heater (3), evaporator (4) and humidifier (5) are set inside the equipment chamber (13). The blower (10) is set at the upper or lower end of the equipment chamber (13). The partition (11) is connected to the test chamber (12) by means of a circulating air vent.

2. The transponder testing device considering complex media and environments according to claim 1, characterized in that: The test chamber (1) is provided with a vent valve (14) at the upper end and one end of the vent valve (14) is connected to the test chamber (12); the test chamber (1) is provided with an operation port on one side and a switch door (15) is provided on the operation port; a lighting lamp (16) is provided on the inner wall of the test chamber (1) and the lighting lamp (16) is located inside the test chamber (12).

3. The transponder testing device considering complex media and environments according to claim 1, characterized in that... The upper end of the vibration table (6) is provided with a limiting fixture and a medium fixture provided on the vibration table (6) and located within the limiting fixture. The limiting fixture includes limiting blocks (17) provided on the four corners of the upper end of the vibration table (6). The limiting blocks (17) are L-shaped and open inward. The media fixture includes a liquid media fixture or a solid media fixture; The liquid medium tooling includes a liquid medium tank (18), an injection port (19) located at the upper end of the liquid medium tank (18), a clearance groove (20) located at the lower end of the liquid medium tank (18), and filling boxes (21) embedded at both ends of the clearance groove (20). The clearance groove (20) is a through groove structure with openings at both ends. The clearance groove (20) corresponds to and is adapted to the transponder (7) at the upper end of the vibration table (6). There are two filling boxes (21) which are embedded in the clearance groove (20) and located at both ends of the transponder (7). The solid medium tooling includes a solid medium housing (22), a medium tank (23) disposed at the upper end of the solid medium housing (22), and a clearance slot (24) disposed at the lower end of the solid medium housing (22). The clearance slot (24) corresponds to and is adapted to the transponder (7), and the medium tank (23) corresponds to the transponder (7).

4. A transponder testing device considering complex media and environments according to claim 1, characterized in that... The vibration table (6) is provided with a test fixing frame at its upper end. The test fixing frame includes a pad (25), a baffle (26) that is respectively provided on the upper side of both ends of the pad (25) and protrudes upward, a limiting groove (27) that is respectively provided on the lower side of both ends of the pad (25), a padding groove (28) provided in the middle of the upper end of the pad (25), a fixing hole (30) provided in the padding groove (28), and an operation groove (29) provided in the middle of the lower end of the pad (25). The baffle (26) corresponds to and is adapted to the limiting groove (27). The padding groove (28) and the operation groove (29) are both through groove structures with one side open.

5. A test system for a transponder test apparatus considering complex media and environments as described in claim 1, characterized in that: It includes a central controller, a negative pressure module, a heating module, a cooling module, a humidification module, a vibration module, a solar radiation module, a radio frequency energy signal generation module, and an uplink signal acquisition and analysis module, all connected to the central controller. The negative pressure module is used to control the vacuum pump (2), the heating module is used to control the heater (3), the cooling module is used to control the evaporator (4), the humidification module is used to control the humidifier (5), the vibration module is used to control the vibration table (6), the solar radiation module is used to control the ultraviolet lamp (9), the radio frequency energy signal generation module is used to send radio frequency energy signals to the transponder (7), the uplink signal acquisition and analysis module is used to acquire and identify the uplink signals sent by the transponder (7), and the central controller receives the control feedback signals of each module to monitor and record the real-time status of the test environment.

6. The testing system according to claim 5, characterized in that: The radio frequency energy signal generation module includes a signal generator, a power amplifier, an attenuator, and a transmitting loop antenna. The output terminal of the signal generator is electrically connected to the input terminal of the power amplifier, the output terminal of the power amplifier is connected to the input terminal of the attenuator, and the output terminal of the attenuator is connected to the input terminal of the transmitting loop antenna.

7. The testing system according to claim 5, characterized in that: The uplink signal acquisition and analysis module includes an acquisition loop antenna, a signal filtering circuit, an A / D sampling and gain acquisition circuit, a signal amplitude detection module, a signal rate detection module, a signal frequency detection module, a signal conditioning and decoding module, and an analysis result display and recording module. The output terminal of the acquisition loop antenna is electrically connected to the input terminal of the signal filtering circuit, the output terminal of the signal filtering circuit is electrically connected to the input terminal of the A / D sampling and gain acquisition circuit, the output terminal of the A / D sampling and gain acquisition circuit is electrically connected to the input terminals of the signal amplitude detection module, the signal rate detection module, the signal frequency detection module, and the signal conditioning and decoding module, respectively, and the input terminal of the analysis result display and recording module is electrically connected to the output terminals of the signal amplitude detection module, the signal rate detection module, the signal frequency detection module, and the signal conditioning and decoding module, respectively.

8. A test method for a transponder test apparatus considering complex media and environments as described in claim 1, characterized in that: Includes the following steps, S1. According to the test environment requirements of the transponder (7), a suitable test environment is provided by setting up a test device, including one or more of the following: negative pressure environment, high temperature or low temperature environment, humid environment, liquid or solid medium coverage, solar radiation environment, and vibration environment. S2. Periodically send excitation signals to the transponder (7) located in the test device, and the activated transponder (7) periodically sends uplink signals; S3. Receive the uplink signal sent by the transponder (7), and analyze and judge it by Fast Fourier Transform (FFT), including message compliance, center frequency, frequency offset, average data rate, jitter and maximum time interval error. S4. Set the threshold values ​​for transponder 7 parameters to determine the performance and lifespan of transponder 7.

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