Automobile tire pressure sensor multi-channel automatic test equipment

Abstract

The application discloses a car tire pressure sensor multi-channel automatic test equipment and belongs to the technical field of tire pressure sensor detection. The car tire pressure sensor multi-channel automatic test equipment comprises a disc detection cabin mechanism, a driving mechanism, a rotary table mechanism, a heat exchange coil mechanism, an instantaneous supercharging mechanism, a cabin door mechanism, a refrigeration and heating mechanism and a pump station mechanism. The application synchronously clamps multiple tire pressure sensors through the rotary table multi-station, synchronously realizes high and low temperature environment, high pressure working condition and horizontal shaft rotation simulation in the closed cabin body, completes multiple sensor temperature, pressure and rotation compound working condition test at one time, greatly improves detection efficiency and data consistency, truly restores the vehicle-mounted use environment, realizes instantaneous supercharging through the air bag type energy accumulator and piston volume compression, accurately simulates tire sudden pressure rise and impact working condition, can test sensor dynamic response performance, has comprehensive test coverage and high repeatability, and effectively improves product reliability and factory detection precision.

Description

Technical Field

[0001] This invention belongs to the field of tire pressure sensor detection technology, specifically involving a multi-channel automated testing device for automotive tire pressure sensors. Background Technology

[0002] Tire pressure sensors are monitoring devices installed inside tires that collect real-time data such as tire pressure and temperature and transmit it to the vehicle's onboard system. They provide timely alerts when abnormalities occur, improving driving safety. They are mainly divided into direct and indirect types, with direct sensors offering higher accuracy and wider application. Tire pressure sensor testing primarily verifies its accuracy, stability, transmission distance, and anti-interference capabilities. Test content includes standard pressure comparison calibration, high and low temperature environmental adaptability testing, and wireless signal transmission testing. By simulating vehicle driving conditions, the stability of data transmission and the accuracy of alarm thresholds are checked to ensure reliable sensor operation under complex road conditions and guarantee the normal operation of the tire pressure monitoring system.

[0003] Current tire pressure sensor testing methods are mostly static, single-environment, and separate: the sensor is usually placed in a constant temperature chamber or pressure tank for separate temperature and pressure tests. While this method can perform temperature and pressure tests on tire pressure sensors, it still has the following drawbacks:

[0004] 1. The lack of horizontal axis rotation simulation makes it impossible to reproduce centrifugal and attitude changes during driving, and the lack of turbulence structure makes it difficult to meet the requirements for temperature uniformity.

[0005] 2. Temperature, pressure, and rotation cannot be applied simultaneously, the test environment differs greatly from the actual vehicle, and the data is not sufficiently authentic;

[0006] 3. Lacking a rapid instantaneous boost function, it is difficult to simulate the impact of sudden tire pressure changes and cannot detect dynamic response;

[0007] 4. Only a small number of sensors can be tested at a time, resulting in poor multi-station parallel processing capability and low detection efficiency.

[0008] For example, Chinese patent application CN2025113785836 discloses a comprehensive test device for tire pressure sensors that simulates the driving conditions of automobile tires. It includes a chamber, an acceleration turntable, a drive motor, a temperature control module, and an inflation module, which can simultaneously apply temperature, pressure, and rotation conditions. However, this device has the following shortcomings: (1) No turbulence structure is set on the turntable, and the temperature distribution inside the chamber may be uneven during multi-station testing, affecting the consistency of the test; (2) The continuous pressurization method using an inflation pipe and a proportional valve cannot simulate the instantaneous pressure impact caused by sudden tire blowout or rapid inflation, and cannot test the dynamic response performance of the sensor; (3) No piston-type instantaneous pressurization mechanism driven by an accumulator is set, making it difficult to achieve controllable and repeatable pressure surges. As another example, Chinese patent application CN213041439U discloses a simulation test device for tire pressure monitoring devices, which realizes multi-sensor rotation testing through a turntable and sensor mounting holes, but this solution lacks temperature control function and instantaneous pressure impact simulation capability. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multi-channel automated testing device for automotive tire pressure sensors.

[0010] The technical solution adopted to solve the above technical problems is: a multi-channel automated testing equipment for automotive tire pressure sensors, including a disc detection chamber mechanism, a drive mechanism, a rotating platform mechanism, a heat exchange coil mechanism, an instantaneous pressurization mechanism, a door mechanism, a refrigeration and heating mechanism, and a pump station mechanism. The rotating platform mechanism includes a turntable body, on which multiple side wall slots are equally spaced, and multiple sensor fixing holes are formed on the turntable body. Multiple baffles are integrally fixed on the turntable body. The side wall slots, sensor fixing holes, and baffles are all arranged in an equally spaced circular array.

[0011] The instantaneous pressurization mechanism includes a fixed frame and a piston cylinder. An accumulator is fixed on the fixed frame. The accumulator is a pneumatic accumulator and its hydraulic output end can be electrically locked. A piston rod is fixed to the output end of the accumulator. A sealed piston disc is fixed to the end of the piston rod. The open end of the piston cylinder is aligned with and sealed to the pressurization channel hole of the disc detection chamber mechanism.

[0012] Through the above technical solution, the turntable body is bolted and fixed to the connecting seat, ensuring high assembly precision and reliable transmission. It can simulate the rotation of a wheel around a horizontal axis under the drive mechanism. Multiple sensor mounting holes are arranged in an equidistant circular array on the turntable body, allowing for the simultaneous mounting of multiple tire pressure sensors and enabling multi-channel synchronous testing. The hollowed-out grooves on the side walls reduce the turntable's weight and balance airflow. Combined with integrated baffle blades, these baffles disturb the gas inside the chamber during rotation, resulting in a more uniform temperature and pressure distribution. The overall structure is symmetrical and has good dynamic balance, ensuring stable operation under high-speed rotation conditions, improving test consistency and environmental simulation realism. It can test multiple sensors at a time, exhibiting strong multi-station parallel capability and high testing efficiency. The airbag-type accumulator is pre-loaded. The accumulator stores energy and maintains it through an electrically locked output. Both the mounting bracket and the piston cylinder are fixed to the vertical chamber, ensuring a stable and reliable structure. The piston cylinder opening is aligned and sealed with the pressurization channel hole. When instantaneous pressure increase is required, the accumulator unlocks the output, quickly driving the piston rod to move the sealed piston disc. The piston disc rapidly compresses the air volume inside the detection chamber, reducing the effective volume to achieve an instantaneous pressure jump, accurately simulating tire pressure surge conditions. The electrically locked structure precisely controls the triggering timing and pressure holding time, while the sealed piston disc ensures a leak-free seal, thus achieving rapid, controllable, and highly repeatable instantaneous pressure increase. This meets the transient pressure response test requirements of tire pressure sensors, simulating tire pressure surge impacts to detect dynamic responses.

[0013] Furthermore, the disc detection chamber mechanism includes a vertical chamber, an electronic pressure relief valve is embedded and fixed on the rear wall of the vertical chamber, a pressure boosting channel hole is opened on the rear wall of the vertical chamber, and the vertical chamber is in the shape of a hollow disc.

[0014] Through the above technical solution, the vertical chamber adopts a hollow disc-shaped structure, forming a regular and sealed testing space inside, providing a stable environmental carrier for tire pressure sensor testing; the electronic pressure relief valve embedded in the rear wall can realize automatic adjustment and rapid release of pressure inside the chamber, ensuring the safety and controllability of the testing process; the pressurization channel hole opened in the rear wall allows for the precise introduction of external high-pressure gas into the chamber, realizing rapid pressure establishment and adjustment; the hollow disc structure can not only ensure the overall rigidity and sealing of the chamber, but also facilitate the arrangement of internal mechanisms and uniform airflow distribution, providing a good structural foundation for multi-station synchronous testing and meeting the testing environment requirements under different pressure conditions.

[0015] Furthermore, a base is fixed to the bottom of the vertical cabin, a control panel is fixed on the base, a multi-channel radio frequency signal receiver is installed in the control panel, multiple spring latches are fixed to the outside of the vertical cabin, and a hinge seat is integrally fixed to one side of the vertical cabin.

[0016] Through the above technical solutions, the base provides stable support for the vertical chamber, ensuring the overall rigidity and stability of the equipment during operation; the control panel allows operators to intuitively set parameters, monitor test status, and execute start-stop control; its integrated multi-channel radio frequency signal receiver can simultaneously receive wireless data from multiple tire pressure sensors, enabling multi-station parallel signal acquisition and real-time monitoring; spring latches are distributed on the outside of the vertical chamber, enabling rapid clamping and reliable sealing of the chamber door, ensuring no pressure leakage inside the chamber; the hinged seat is used for hinged assembly of the chamber door mechanism, enabling flexible opening and closing and precise alignment of the chamber door; the overall structural layout is reasonable, the installation is stable, the operation is convenient, and it takes into account the equipment's sealing performance, safety of use, and ease of maintenance, providing a stable and reliable structural foundation for automated testing.

[0017] Furthermore, the drive mechanism includes a variable frequency motor fixed to the rear of the vertical cabin. The output end of the variable frequency motor is connected to a motor shaft, and a connecting seat is coaxially fixed to the end of the motor shaft. Multiple connecting bolts are passed through the connecting seat.

[0018] Through the above technical solution, the variable frequency motor is fixed at the rear of the vertical cabin, and the output power is stable and controllable. The speed can be adjusted to simulate different driving conditions. The motor shaft is fixed coaxially with the connecting seat to ensure transmission concentricity and rotation accuracy, and reduce vibration and eccentricity errors. The connecting seat is rigidly connected to the rotating platform mechanism through multiple connecting bolts to realize reliable power transmission and drive the platform to rotate smoothly, thereby realistically simulating the rotation of the wheel around the horizontal axis and realistically restoring the centrifugal and attitude changes under driving conditions.

[0019] Furthermore, the heat exchange coil mechanism includes an outer coil, an inner coil connected to the inner side of the outer coil, an open end of the outer coil being a liquid inlet, an open end of the inner coil being a liquid outlet, and a plurality of coil fixing clips fitted on the outer coil, the coil fixing clips being fixed to the inner wall of the vertical chamber.

[0020] Through the above technical solution, the outer coil and the inner coil are connected to form a double-layer coil structure, which increases the heat exchange area with the gas in the chamber, improves the heat exchange efficiency, and facilitates rapid adjustment of the chamber temperature. The outer coil is the liquid inlet and the inner coil is the liquid outlet, which allows the heat exchange medium to flow in an orderly manner and ensures heat exchange uniformity. The coil fixing clip firmly fixes the heat exchange coil mechanism to the inner wall of the vertical chamber, preventing the coil from shaking during equipment operation and ensuring structural stability. The overall structural design is reasonable and adaptable to the disc structure of the vertical chamber, which can quickly build a stable temperature environment to meet the testing requirements of the tire pressure sensor under different temperature conditions and realize the synchronous application of temperature, pressure and rotation.

[0021] Furthermore, the hatch mechanism includes a hinged arm rotatably connected to the hinged seat, a hatch body integrally fixed to the hinged arm, a plurality of locking hooks integrally fixed to the hatch body, a sealing ring bonded to the inner side of the hatch body, and an observation window embedded in the hatch body.

[0022] Through the above technical solution, the door mechanism is rotatably connected to the hinged seat of the vertical chamber via a hinged arm, enabling flexible opening and closing of the door body, which facilitates sensor clamping and equipment maintenance; the latch hook on the door body cooperates with the spring latch of the vertical chamber to quickly lock the door and ensure the airtightness of the test chamber; the sealing ring bonded on the inner side further enhances the sealing performance, prevents pressure and temperature leakage inside the chamber, and ensures a stable test environment; the embedded observation window allows operators to observe the test status inside the chamber in real time, keep abreast of the operation of sensors and equipment, and monitor the test process without opening the door.

[0023] Furthermore, the refrigeration and heating mechanism includes a small high and low temperature integrated unit, which is connected to a liquid outlet pipe and a liquid return pipe. The liquid outlet pipe is connected to an outer coil, and the liquid return pipe is connected to an inner coil. The liquid outlet pipe and the liquid return pipe are wrapped with an insulation sleeve.

[0024] Through the above technical solution, the small high and low temperature integrated unit can be the LC-GDX-10 / 10 model high and low temperature integrated unit, or other high and low temperature integrated units with a large temperature control range. The small high and low temperature integrated unit can stably output heat exchange medium at different temperatures, which is transported to the outer and inner coils of the heat exchange coil mechanism through the liquid outlet pipe. After heat exchange in the outer and inner coils, it flows back to the small high and low temperature integrated unit through the liquid return pipe, forming a closed-loop heat exchange circuit, realizing precise control of the temperature inside the detection chamber. The insulation jacket wrapped around the liquid outlet pipe and the liquid return pipe can effectively reduce the temperature loss of the heat exchange medium during the transportation process, ensuring heat exchange efficiency and temperature control accuracy. The overall structure is adapted to the double-layer layout of the heat exchange coil, which can quickly build and maintain the required high and low temperature environment inside the chamber, meet the performance testing requirements of the tire pressure sensor under different temperature conditions, and improve the accuracy and reliability of the test data.

[0025] Furthermore, the pump station mechanism includes a pump station cabinet fixed to the bottom of the base. The pump station cabinet is externally connected to a pressurized air pipe, a compressed nitrogen tank, and a hydraulic oil pipe. The pump station cabinet is internally equipped with a hydraulic pump, an air compressor, and a compressed nitrogen tank. One end of the pressurized air pipe is connected to the air compressor, and the other end is connected to the vertical cabin. One end of the compressed nitrogen tank is connected to the compressed nitrogen tank, and the other end is connected to the air bladder of the accumulator. One end of the hydraulic oil pipe is connected to the hydraulic pump, and the other end is connected to the hydraulic oil chamber of the accumulator.

[0026] Through the above technical solution, the pump station cabinet is fixed to the bottom of the base, integrating the hydraulic pump, air compressor, and compressed nitrogen tank. The structure is compact and rationally laid out, providing stable power support for equipment operation. The pressurized air pipe connects the air compressor to the vertical chamber, allowing compressed air to be introduced into the chamber, enabling the establishment and maintenance of both conventional and high-pressure operating conditions. Before the instantaneous pressure boosting test, the accumulator's output end is locked. The compressed nitrogen tank fills the accumulator's air bladder with compressed nitrogen. At this time, pressure accumulates in the accumulator's hydraulic oil chamber. When the instantaneous pressure boosting test is required, the accumulator's output end unlocks, and the compressed nitrogen in the air bladder expands instantaneously, thereby pushing the output end to quickly drive the piston rod, which in turn moves the sealed piston disc. When it is necessary to retract the output end and compressed nitrogen, the hydraulic pump pumps hydraulic oil into the accumulator's hydraulic oil chamber. The hydraulic oil expands, causing the air bladder to contract, and the compressed nitrogen is forced back into the compressed nitrogen tank. The compressed nitrogen tank valve closes, and the hydraulic... The pressure pump then draws hydraulic oil from the accumulator. Under negative pressure, the accumulator output retracts, resetting the piston rod and sealing piston disc for repeated instantaneous pressurization tests. Through the coordinated action of the turbulence vanes on the rotating platform mechanism and the rotation of the turntable, the sensor rotation conditions are simulated while the turntable's rotational kinetic energy drives the turbulence vanes to agitate the gas inside the chamber, promoting a uniform distribution of temperature and pressure fields. This eliminates local temperature differences and pressure gradients caused by the chamber structure or sensor arrangement in multi-station parallel testing, significantly improving the consistency of multi-channel test data. The instantaneous pressurization mechanism adopts a closed-loop energy storage-release structure of a bladder-type accumulator and piston cylinder, enabling millisecond-level pressure jumps to accurately simulate transient impact conditions such as sudden tire blowouts and rapid air leaks. Simultaneously, nitrogen is recovered in reverse by the hydraulic pump to achieve energy recycling, resulting in higher repeatability and control accuracy.

[0027] Furthermore, the input end of the electronic pressure relief valve is connected to the interior of the vertical cabin, and the output end is connected to the exterior of the vertical cabin.

[0028] Furthermore, the control panel is equipped with a PLC controller, which automatically controls the sequential operation of the refrigeration and heating mechanism, the pump station mechanism, the drive mechanism, and the instantaneous pressurization mechanism according to the set temperature, pressure, speed, and instantaneous pressurization trigger conditions.

[0029] Through the above technical solution, the built-in PLC controller serves as the core central control unit of the equipment. It can coordinate and manage the start and stop of all actuators of the entire equipment with one click. It operates in a closed loop according to the preset rated temperature control threshold, standard pressure gradient, simulated wheel speed parameters, and instantaneous pressure boosting precise triggering timing program, without the need for manual intervention at each step, and has a high degree of automation integration. It can synchronously match the timing of multi-channel radio frequency acquisition, high and low temperature constant temperature control, constant pressure stabilization, rotational uniform speed drive, and millisecond-level instantaneous pressure boosting, effectively avoiding the timing deviation, parameter control error, and human operation errors caused by manual step-by-step operation. It comprehensively ensures a high degree of uniformity in the synchronous testing conditions of multi-station tire pressure sensors, greatly improving the parallel consistency and traceability reliability of batch test data. At the same time, it automatically completes the closed loop of the test process, fault self-check shutdown, and real-time recording of operating conditions, reducing manual maintenance costs and improving the overall operating safety factor and batch automated testing efficiency of the equipment.

[0030] The beneficial effects of this invention are as follows:

[0031] 1. High-efficiency multi-condition composite testing: Through the coordination of the rotating platform and drive mechanism, heat exchange coil and refrigeration and heating mechanism, pump station and instantaneous pressurization mechanism, temperature, pressure and rotation composite conditions are realized simultaneously in the same sealed chamber, and multi-channel parallel testing is supported, which greatly improves the testing efficiency.

[0032] 2. Improved test environment consistency: By coordinating the rotation of the spoiler blades and the turntable, the rotational kinetic energy is used to actively balance the temperature and pressure fields inside the chamber, eliminating environmental differences between multiple workstations, and enabling multi-sensor test data to have higher intra-group consistency and repeatability.

[0033] 3. Transient pressure shock testing capability: By forming an energy storage-release closed loop with a bladder-type accumulator and piston cylinder, millisecond-level pressure surge is achieved, accurately simulating transient conditions such as sudden tire blowout and rapid air leakage, filling the gap in the lack of dynamic response testing methods in existing testing equipment.

[0034] 4. Energy saving and repeatability: The instantaneous pressurization mechanism recovers nitrogen gas in reverse through a hydraulic pump, realizing the recycling of the energy storage medium and reducing testing costs; at the same time, electric locking and PLC control ensure the accuracy and repeatability of each instantaneous pressurization. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0036] Figure 2 This is a schematic diagram of the disc detection chamber mechanism of the present invention;

[0037] Figure 3 This is a schematic diagram of the drive mechanism structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the rotating platform mechanism and heat exchange coil mechanism of the present invention;

[0039] Figure 5 This is a schematic diagram of the rotating platform mechanism of the present invention, wherein the dashed arrow indicates the flow direction of the airflow under the action of the baffle.

[0040] Figure 6 This is a schematic diagram of the heat exchange coil mechanism of the present invention;

[0041] Figure 7 This is a schematic diagram of the instantaneous booster mechanism of the present invention;

[0042] Figure 8 This is a schematic diagram of the hatch mechanism structure of the present invention;

[0043] Figure 9 This is a schematic diagram of the cooling and heating mechanism of the present invention;

[0044] Figure 10 This is a schematic diagram of the pump station mechanism of the present invention.

[0045] Reference numerals: 1. Circular detection chamber mechanism; 101. Vertical chamber; 102. Electronic pressure relief valve; 103. Pressure boosting channel hole; 104. Base; 105. Control panel; 106. Spring lock; 107. Hinge seat; 2. Drive mechanism; 201. Variable frequency motor; 202. Motor shaft; 203. Connecting seat; 204. Connecting bolt; 3. Rotating platform mechanism; 301. Turntable body; 302. Side wall perforated groove; 303. Sensor fixing hole; 304. Baffle blade; 4. Heat exchange coil mechanism; 401. Outer coil; 402. Inner coil; 403. 5. Instantaneous pressurization mechanism; 501. Fixing frame; 502. Accumulator; 503. Piston cylinder; 504. Piston rod; 505. Sealed piston disc; 6. Door mechanism; 601. Hinge arm; 602. Door body; 603. Locking hook; 604. Sealing ring; 605. Observation window; 7. Refrigeration and heating mechanism; 701. Small high and low temperature integrated unit; 702. Liquid outlet pipe; 703. Liquid return pipe; 704. Insulation sleeve; 8. Pump station mechanism; 801. Pump station cabinet; 802. Pressurized gas pipe; 803. Compressed nitrogen tank; 804. Hydraulic oil pipe. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0047] like Figures 1-10As shown, the multi-channel automated testing equipment for automotive tire pressure sensors includes a disc detection chamber mechanism 1, a drive mechanism 2, a rotating platform mechanism 3, a heat exchange coil mechanism 4, an instantaneous pressurization mechanism 5, a door mechanism 6, a cooling and heating mechanism 7, and a pump station mechanism 8. The disc detection chamber mechanism 1 includes a vertical chamber 101, an electronic pressure relief valve 102 is embedded and fixed on the rear wall of the vertical chamber 101, and a pressurization channel hole 103 is opened on the rear wall of the vertical chamber 101. The vertical chamber 101 is in the shape of a hollow disc, and a base 104 is fixed at the bottom of the vertical chamber 101. A control panel 105 is fixed on the 104, and a multi-channel radio frequency signal receiver is installed inside the control panel 105. Multiple spring latches 106 are fixed externally to the vertical chamber 101. A hinge seat 107 is integrally fixed to one side of the vertical chamber 101. The vertical chamber 101 adopts a hollow disc-shaped structure, forming a regular and sealed detection space inside, providing a stable environment for tire pressure sensor testing. An electronic pressure relief valve 102 embedded in the rear wall can realize automatic pressure adjustment and rapid release within the chamber, ensuring a safe and controllable testing process. A pressurization valve is opened on the rear wall. The channel hole 103 is used for the precise introduction of external high-pressure gas into the chamber, enabling rapid pressure establishment and regulation. The hollow disc structure ensures both the overall rigidity and sealing of the chamber, while also facilitating the internal mechanism layout and uniform airflow distribution, providing a good structural foundation for multi-station synchronous testing and meeting the testing environment requirements under different pressure conditions. The base 104 provides stable support for the vertical chamber 101, ensuring the overall rigidity and stability of the equipment during operation. The control panel 105 allows operators to intuitively set parameters, monitor test status, and execute start-stop control. Its integrated multi-channel radio frequency signal receiver can simultaneously receive wireless data from multiple tire pressure sensors, enabling parallel signal acquisition and real-time monitoring at multiple stations. Spring latches 106 are distributed on the outside of the vertical chamber 101, enabling rapid clamping and reliable sealing of the chamber door, ensuring no pressure leakage inside the chamber. The hinge seat 107 is used for the hinged assembly of the chamber door mechanism 6, enabling flexible opening and closing and precise alignment of the chamber door. The overall structure is reasonably laid out, securely installed, and easy to operate, taking into account the equipment's sealing performance, safety of use, and ease of maintenance, providing a stable and reliable structural foundation for automated testing.

[0048] like Figure 1 and Figure 3As shown, the drive mechanism 2 includes a variable frequency motor 201 fixed to the rear of the vertical cabin 101. The output end of the variable frequency motor 201 is connected to a motor shaft 202. A connecting seat 203 is coaxially fixed to the end of the motor shaft 202. Multiple connecting bolts 204 are threaded through the connecting seat 203. The variable frequency motor 201 is fixed to the rear of the vertical cabin 101, and the output power is stable and controllable. The speed can be adjusted to simulate different driving states. The motor shaft 202 and the connecting seat 203 are coaxially fixed to ensure transmission concentricity and rotational accuracy, and reduce vibration and eccentricity errors. The connecting seat 203 is rigidly connected to the rotating platform mechanism 3 through multiple connecting bolts 204 to realize reliable power transmission and drive the platform to rotate smoothly, thereby realistically simulating the rotation of the wheel around the horizontal axis.

[0049] like Figure 1 , Figure 4 and Figure 5 As shown, the rotating platform mechanism 3 includes a turntable body 301. Multiple sidewall slots 302 are equidistantly spaced on the turntable body 301. Multiple sensor mounting holes 303 are also provided on the turntable body 301. The turntable body 301 is bolted to the connecting seat 203. Multiple baffle blades 304 are integrally fixed to the turntable body 301. The sidewall slots 302, sensor mounting holes 303, and baffle blades 304 are all arranged in an equidistant circular array. The turntable body 301 is bolted to the connecting seat 203, resulting in high assembly precision and reliable transmission. Driven by the drive mechanism 2, the rotating disc simulates the rotation of a wheel around a horizontal axis. Multiple sensor mounting holes 303 are arranged in an equidistant circular array on the turntable body 301, allowing for the simultaneous mounting of multiple tire pressure sensors and enabling multi-channel synchronous testing. The sidewall perforated grooves 302 reduce the turntable's mass and balance airflow. Combined with the integrally formed baffle blades 304, when the variable frequency motor 201 drives the turntable body 301 to rotate to simulate the rotation of the wheel's horizontal axis, the baffle blades 304 rotate synchronously, continuously agitating the air inside the vertical chamber 101, creating forced convection. This forced convection accelerates the heat exchange efficiency between the heat exchange coil mechanism 4 and the gas inside the chamber, rapidly bringing the temperature near each sensor mounting hole 303 to a uniform level. Furthermore, it eliminates local dead zones and pressure gradients caused by the chamber's geometry or sensor arrangement. Through this collaborative design, a uniform environmental field can be obtained without the need for an additional power source while achieving synchronous rotation testing of multiple sensors. The difference in the test environment of each sensor station is reduced compared to the design without turbulence. The overall structural layout is symmetrical and has good dynamic balance performance, which meets the requirements for stable operation under high-speed rotation conditions and improves the consistency of testing and the realism of environmental simulation.

[0050] like Figure 1 , Figure 4 and Figure 6As shown, the heat exchange coil mechanism 4 includes an outer coil 401, with an inner coil 402 connected to the inner side of the outer coil 401. The open end of the outer coil 401 is the liquid inlet, and the open end of the inner coil 402 is the liquid outlet. Multiple coil fixing clips 403 are fitted onto the outer coil 401, and the coil fixing clips 403 are fixed to the inner wall of the vertical chamber 101. The outer coil 401 and the inner coil 402 are connected to form a double-layer coil structure, which increases the heat exchange area with the gas inside the chamber and improves the heat exchange efficiency. This design facilitates rapid adjustment of the chamber temperature; the outer coil 401 is the liquid inlet and the inner coil 402 is the liquid outlet, ensuring orderly flow of the heat exchange medium and uniform heat exchange; the coil fixing clip 403 firmly fixes the heat exchange coil mechanism 4 to the inner wall of the vertical chamber 101, preventing the coil from shaking during operation and ensuring structural stability; the overall structural design is reasonable and adaptable to the disc structure of the vertical chamber 101, enabling the rapid construction of a stable temperature environment to meet the testing requirements of the tire pressure sensor under different temperature conditions.

[0051] like Figure 1 and Figure 7 As shown, the instantaneous pressurization mechanism 5 includes a fixed frame 501 and a piston cylinder 503. An accumulator 502 is fixed on the fixed frame 501. A piston rod 504 is fixed to the output end of the accumulator 502, and a sealing piston disc 505 is fixed to the end of the piston rod 504. The accumulator 502 is a pneumatic accumulator 502, and its hydraulic output end can be electrically locked. Both the fixed frame 501 and the piston cylinder 503 are fixed to the vertical cabin 101. The open end of the piston cylinder 503 is aligned with and sealed to the pressurization channel hole 103. The pneumatic accumulator 502 stores energy in advance and maintains energy by electrically locking the output end. Both the fixed frame 501 and the piston cylinder 503 are... Fixed to the vertical chamber 101, the structure is stable and reliable. The open end of the piston cylinder 503 is aligned and sealed with the pressurization channel hole 103. When instantaneous pressure increase is required, the accumulator 502 unlocks the output end, quickly driving the piston rod 504 to move the sealed piston disc 505. The piston disc rapidly compresses the air volume inside the detection chamber, reducing the effective volume inside the chamber to achieve instantaneous pressure jump, accurately simulating the tire pressure change condition. The electric locking structure can precisely control the triggering time and pressure holding time. The sealed piston disc 505 ensures a leak-free seal, thereby achieving rapid, controllable, and highly repeatable instantaneous pressure increase, meeting the requirements of the tire pressure sensor transient pressure response test.

[0052] like Figure 1 and Figure 8As shown, the hatch mechanism 6 includes a hinge arm 601 rotatably connected to the hinge seat 107. A hatch body 602 is integrally fixed to the hinge arm 601. Multiple locking hooks 603 are integrally fixed to the hatch body 602. A sealing ring 604 is bonded to the inner side of the hatch body 602. An observation window 605 is embedded in the hatch body 602. The hatch mechanism 6 is rotatably connected to the hinge seat 107 of the vertical hatch 101 via the hinge arm 601, enabling the hatch body 602 to open and close flexibly, facilitating... Sensor clamping and equipment maintenance; the latch hook 603 on the door body 602 corresponds to the spring latch 106 on the vertical chamber 101, which can quickly lock the door and ensure the airtightness of the test chamber; the sealing ring 604 bonded on the inner side further enhances the sealing performance, prevents pressure and temperature leakage inside the chamber, and ensures the stability of the test environment; the embedded observation window 605 allows the operator to observe the test status inside the chamber in real time, keep abreast of the operation of the sensors and equipment, and monitor the test process without opening the door.

[0053] like Figure 1 and Figure 9 As shown, the refrigeration and heating mechanism 7 includes a small high-low temperature integrated unit 701. The small high-low temperature integrated unit 701 is connected to an outlet pipe 702 and a return pipe 703. The outlet pipe 702 is connected to the outer coil 401, and the return pipe 703 is connected to the inner coil 402. The outlet pipe 702 and the return pipe 703 are wrapped with an insulation sleeve 704. The small high-low temperature integrated unit 701 can be an LC-GDX-10 / 10 model high-low temperature integrated unit, or other high-low temperature integrated units with a large temperature control range. The small high-low temperature integrated unit 701 can stably output heat exchange media at different temperatures, which are transported to the outer coil of the heat exchange coil mechanism 4 through the outlet pipe 702. The side coil 401 and the inner coil 402 exchange heat and then return to the small high and low temperature integrated unit 701 via the return pipe 703, forming a closed-loop heat exchange circuit to achieve precise control of the temperature inside the detection chamber. The insulation jacket 704 wrapped around the outlet pipe 702 and the return pipe 703 can effectively reduce the temperature loss of the heat exchange medium during transportation, ensuring heat exchange efficiency and temperature control accuracy. The overall structure is adapted to the double-layer layout of the heat exchange coils, which can quickly build and maintain the required high and low temperature environment inside the chamber, meet the performance testing requirements of the tire pressure sensor under different temperature conditions, and improve the accuracy and reliability of the test data.

[0054] like Figure 1 , Figure 7 and Figure 10As shown, the pump station mechanism 8 includes a pump station cabinet 801 fixed to the bottom of the base 104. The pump station cabinet 801 is externally connected to a pressurized air pipe 802, a compressed nitrogen tank 803, and a hydraulic oil pipe 804. The pump station cabinet 801 internally houses a hydraulic pump, an air compressor, and the compressed nitrogen tank 803. One end of the pressurized air pipe 802 is connected to the air compressor, and the other end is connected to the vertical cabin 101. One end of the compressed nitrogen tank 803 is connected to the compressed nitrogen tank 803, and the other end is connected to the air bladder of the accumulator 502. One end of the hydraulic oil pipe 804 is connected to the hydraulic pump, and the other end... Connected to the hydraulic oil chamber of accumulator 502, pump station cabinet 801 is fixed to the bottom of base 104, integrating hydraulic pump, air compressor, and compressed nitrogen tank 803. Its compact structure and reasonable layout provide stable power support for equipment operation. Pressurized air pipe 802 connects the air compressor to the vertical chamber 101, allowing compressed air to be introduced into the chamber, enabling the establishment and maintenance of both normal and high-pressure operating conditions. Before the instantaneous pressure test, the output end of accumulator 502 is locked. Compressed nitrogen tank 803 fills the air bladder of accumulator 502 with compressed nitrogen. At this time, accumulator 502... The hydraulic oil chamber accumulates pressure. When an instantaneous pressure boosting test is required, the output end of the accumulator 502 unlocks, and the compressed nitrogen in the bladder expands instantaneously, thereby pushing the output end to quickly drive the piston rod 504 to move the sealed piston disc 505. When it is necessary to retract the output end and the compressed nitrogen, the hydraulic pump pumps hydraulic oil into the hydraulic oil chamber of the accumulator 502. The volume of the hydraulic oil expands, causing the bladder to contract, and the compressed nitrogen is forced back into the compressed nitrogen tank 803. The valve of the compressed nitrogen tank 803 closes, and the hydraulic pump then draws hydraulic oil from the accumulator 502. Under the action of negative pressure... The output of accumulator 502 retracts, resetting piston rod 504 and sealing piston disc 505 to facilitate repeated instantaneous pressurization tests. The PLC controller in control panel 105 controls the coordinated operation of pump station mechanism 8 and instantaneous pressurization mechanism 5 according to the following logic: Before the instantaneous pressurization test, the output of accumulator 502 is electrically locked. Compressed nitrogen tank 803 fills the bladder of accumulator 502 with compressed nitrogen at a set pressure. The hydraulic pump injects hydraulic oil into the hydraulic oil chamber of accumulator 502 to reach the predetermined pressure, compressing the bladder and completing energy storage. When an instantaneous pressurization test is required, the controller sends an unlock signal, the output of accumulator 502 is released instantaneously, and the compressed nitrogen in the bladder rapidly expands, pushing piston rod 504 and sealing piston disc 505 forward at 1.5-5.0 m / s, compressing the effective volume within the chamber and achieving a pressure jump. After the test is completed, the controller activates the hydraulic pump to work in reverse, pumping hydraulic oil into the hydraulic oil chamber of the accumulator 502. The expansion of the hydraulic oil forces the gas bladder to contract, and compressed nitrogen flows back to the compressed nitrogen tank 803 through the pipeline and closes the valve. Then, the hydraulic pump extracts hydraulic oil from the accumulator 502, and the piston rod 504 and the sealing piston disc 505 reset under negative pressure. The entire reset process can be repeated a certain number of times by the controller, realizing the automation of multiple instantaneous pressure boosting tests.

[0055] The working principle of this embodiment is as follows: During specific testing, multiple tire pressure sensors are first installed into the sensor fixing holes 303, and the hatch is closed and locked. Test parameters are set through the control panel 105, including: temperature range (e.g., -40℃ to 125℃), pressure range (e.g., 0 to 800kPa), rotation speed (e.g., 0 to 3000rpm), pressure holding time (e.g., 1 to 60 minutes), and instantaneous pressure boosting trigger conditions (e.g., pressure jumps from 200kPa to 500kPa, jump time ≤50ms). After the system starts, the small high and low temperature integrated unit 701 starts working, and the heat exchange medium circulates in the outer coil 401 and the inner coil 402 to adjust the temperature inside the chamber to the set value and stabilize it within ±0.5℃; the air compressor fills the vertical chamber 101 with compressed air through the pressurized air pipe 802 to establish the basic static pressure; the variable frequency motor 201 drives the turntable body 301 to rotate at the set speed. After the temperature, pressure, and rotation speed stabilize, the controller unlocks the accumulator 502 according to preset trigger conditions (such as time or external commands). The sealed piston disc 505 completes its compression stroke within 20ms, and the pressure inside the chamber instantly rises to the target value. The multi-channel radio frequency signal receiver simultaneously records the pressure, temperature data, and response time of each sensor during this impact process. After the instantaneous pressurization test is completed, the electronic pressure relief valve 102 slowly releases pressure (the pressure relief rate can be set, such as 5kPa / s), stopping cooling, heating, and rotation. After the pressure inside the chamber drops to atmospheric pressure, the chamber is opened and the sensors are removed.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A multi-channel automated testing device for automotive tire pressure sensors, comprising a disc detection chamber mechanism (1), a drive mechanism (2), a rotating platform mechanism (3), a heat exchange coil mechanism (4), an instantaneous pressurization mechanism (5), a door mechanism (6), a cooling and heating mechanism (7), and a pump station mechanism (8), characterized in that: The rotating platform mechanism (3) includes a turntable body (301), on which multiple side wall hollow slots (302) are equally spaced, and multiple sensor fixing holes (303) are opened on the turntable body (301). Multiple baffle blades (304) are integrally fixed on the turntable body (301). The side wall hollow slots (302), sensor fixing holes (303) and baffle blades (304) are all arranged in an equidistant circular array. The instantaneous pressurization mechanism (5) includes a fixed frame (501) and a piston cylinder (503). An accumulator (502) is fixed on the fixed frame (501). The accumulator (502) is a pneumatic accumulator (502) and its hydraulic output end can be electrically locked. A piston rod (504) is fixed to the output end of the accumulator (502). A sealing piston disc (505) is fixed to the end of the piston rod (504). The open end of the piston cylinder (503) is aligned with and sealed to the pressurization channel hole (103) of the disc detection chamber mechanism (1).

2. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 1, characterized in that, The disc detection chamber mechanism (1) includes a vertical chamber (101), an electronic pressure relief valve (102) is embedded and fixed on the rear wall of the vertical chamber (101), and a pressure boosting channel hole (103) is opened on the rear wall of the vertical chamber (101). The vertical chamber (101) is in the shape of a hollow disc.

3. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 2, characterized in that, The bottom of the vertical cabin (101) is fixed with a base (104), and a control panel (105) is fixed on the base (104). A multi-channel radio frequency signal receiver is installed in the control panel (105). Multiple spring latches (106) are fixed to the outside of the vertical cabin (101). A hinge seat (107) is integrally fixed to one side of the vertical cabin (101).

4. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 2, characterized in that, The drive mechanism (2) includes a variable frequency motor (201) fixed to the rear of the vertical cabin (101). The output end of the variable frequency motor (201) is connected to a motor shaft (202). A connecting seat (203) is coaxially fixed to the end of the motor shaft (202). Multiple connecting bolts (204) are passed through the connecting seat (203).

5. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 1, characterized in that, The heat exchange coil mechanism (4) includes an outer coil (401), and an inner coil (402) is connected to the inner side of the outer coil (401). The open end of the outer coil (401) is the liquid inlet end, and the open end of the inner coil (402) is the liquid outlet end. Multiple coil fixing clips (403) are sleeved on the outer coil (401), and the coil fixing clips (403) are fixed to the inner wall of the vertical chamber (101).

6. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 3, characterized in that, The hatch mechanism (6) includes a hinge arm (601) rotatably connected to a hinge seat (107), a hatch body (602) integrally fixed on the hinge arm (601), a plurality of latch hooks (603) integrally fixed on the hatch body (602), a sealing ring (604) bonded to the inner side of the hatch body (602), and an observation window (605) inlaid and fixed on the hatch body (602).

7. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 1, characterized in that, The refrigeration and heating mechanism (7) includes a small high and low temperature integrated unit (701). The small high and low temperature integrated unit (701) is connected to a liquid outlet pipe (702) and a liquid return pipe (703). The liquid outlet pipe (702) is connected to an outer coil (401), and the liquid return pipe (703) is connected to an inner coil (402). The liquid outlet pipe (702) and the liquid return pipe (703) are wrapped with an insulation sleeve (704).

8. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 3, characterized in that, The pump station mechanism (8) includes a pump station cabinet (801) fixed to the bottom of the base (104). The pump station cabinet (801) is externally connected to a pressurized air pipe (802), a compressed nitrogen tank (803), and a hydraulic oil pipe (804). The pump station cabinet (801) is internally equipped with a hydraulic pump, an air compressor, and a compressed nitrogen tank (803). One end of the pressurized air pipe (802) is connected to the air compressor, and the other end is connected to the vertical cabin (101). One end of the compressed nitrogen tank (803) is connected to the compressed nitrogen tank (803), and the other end is connected to the air bladder of the accumulator (502). One end of the hydraulic oil pipe (804) is connected to the hydraulic pump, and the other end is connected to the hydraulic oil chamber of the accumulator (502).

9. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 2, characterized in that, The input end of the electronic pressure relief valve (102) is connected to the interior of the vertical cabin (101), and the output end is connected to the exterior of the vertical cabin (101).

10. The multi-channel automated testing equipment for automotive tire pressure sensors according to claim 3, characterized in that, The control panel (105) is equipped with a PLC controller, which automatically controls the sequential operation of the refrigeration and heating mechanism (7), the pump station mechanism (8), the drive mechanism (2) and the instantaneous pressure boosting mechanism (5) according to the set temperature, pressure, speed and instantaneous pressure boosting trigger conditions.

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