A device and method for detecting motion posture of rail transit vehicle

Abstract

The present invention relates to the technical field of posture detection, and more specifically to a device and method for detecting the motion posture of a rail transit vehicle, comprising a mounting plate, a front-to-back posture detector, and a left-to-right posture detector. The mounting plate comprises a mounting plate body, a rotating support platform, an adjustment handle, a gear, a damping ring, and a spirit level. The rotating support platform has an outer ring rack, which is rotatably mounted on the mounting plate body. The gear is rotatably mounted on the mounting plate body and meshes with the outer ring rack. The adjustment handle is connected to the gear. The damping ring is mounted on one side of the rotating support platform, and the spirit level is mounted on the mounting plate body. The front-to-back posture detector is mounted on the rotating support platform, and the left-to-right posture detector is mounted on the front-to-back posture detector. This allows for convenient adjustment of the detection device's position to improve measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of posture detection, and in particular to a device and method for detecting the motion posture of a rail transit vehicle. Background Art

[0002] Rail transit vehicle motion detection uses a series of sensors and advanced algorithms to monitor and analyze key parameters such as vehicle position, speed, acceleration, and tilt angle in real time during operation. This technology is crucial for ensuring the safety, stability, and comfort of train operations. Accurately detecting vehicle motion can promptly identify and warn of potential safety hazards, such as track deviation, abnormal vibration, or vehicle tilt, allowing appropriate measures to be taken to prevent accidents.

[0003] Existing detection devices for the motion posture of rail transit vehicles are directly installed on the vehicles, and cannot be guaranteed to be in a horizontal state when installed on the vehicles, which easily causes measurement errors and reduces measurement accuracy. Summary of the Invention

[0004] The object of the present invention is to provide a device and method for detecting the motion posture of a rail transit vehicle, so as to facilitate adjustment of the position of the detection device to improve measurement accuracy.

[0005] To achieve the above-mentioned object, in a first aspect, the present invention provides a device for detecting the motion posture of a rail transit vehicle, comprising a mounting plate, a front-to-rear posture detector, and a left-to-right posture detector;

[0006] The mounting plate includes a mounting plate body, a rotating support platform, an adjusting handle, a gear, a damping ring and a spirit level, wherein the rotating support platform has an outer ring rack, the rotating support platform is rotatably arranged on the mounting plate body, the gear is rotatably arranged on the mounting plate body and meshes with the outer ring rack, the adjusting handle is connected to the gear, the damping ring is arranged on one side of the rotating support platform, and the spirit level is arranged on the mounting plate body;

[0007] The front-to-back posture detector is arranged on the rotation support platform, and the left-to-right posture detector is arranged on the front-to-back posture detector.

[0008] In which, the damping ring includes two damping ring bodies, a clamping screw and two anti-slip pads. The two damping ring bodies are slidably arranged on the mounting plate body and are located on both sides of the rotating support platform. The clamping screw has two opposite sections of threads. The clamping screw is threadedly connected to the two damping ring bodies, and the anti-slip pad is arranged on one side of the damping ring body.

[0009] Among them, the front and rear posture detector includes a sliding sleeve, a support plate, a support spring and a pressure sensor, the sliding sleeve has a cavity, the sliding sleeve is slidably set on the rotating support platform, the support plate is slidably set on one side of the sliding sleeve, the support spring is set on one side of the support plate for supporting the support plate, and the pressure sensor is set on one side of the support spring.

[0010] The front-back attitude detector further comprises a dustproof cover and a connecting ring. The dustproof cover is arranged on the outside of the sliding cover. The connecting ring is fixed to the rotating support platform and connected to the dustproof cover.

[0011] Among them, the left and right posture detector includes a sphere, two sliding plates, two connecting rods, two air cavities and two air pressure sensors. The sphere is slidably arranged in the cavity of the sliding sleeve, the two sliding plates are slidably arranged on both sides of the sphere, the two connecting rods are respectively connected to the two sliding plates and respectively connected to the two air cavities, and the two air pressure sensors are respectively arranged on the two air cavities.

[0012] The sliding plate includes a sliding plate body, a guide rod and a plurality of ball bearings. The guide rod is fixedly connected to the sliding plate body and is located in a guide groove in the sliding sleeve. The plurality of ball bearings are arranged between the guide rod and the guide groove.

[0013] In which, the air cavity includes an air cavity body, a connecting plate, a flexible connecting belt, an inflation valve and an air pressure regulator. The air cavity body is fixed on one side of the sliding sleeve, the connecting plate closes the air cavity body through a flexible connecting belt, the connecting rod is connected to the connecting plate, the inflation valve is connected to the air cavity body, and the air pressure regulator is connected to the inflation valve.

[0014] Wherein, the air pressure regulator includes a vehicle speed acquisition unit, a target air pressure acquisition unit and an air pressure adjustment unit;

[0015] The vehicle speed acquisition unit is used to acquire the moving speed of the rail transit vehicle;

[0016] The target air pressure acquisition unit is configured to obtain the target air pressure used by the corresponding air cavity based on the moving speed by looking up a table;

[0017] The air pressure adjustment unit is used to adjust the inflation valve based on the difference between the current air pressure value obtained by the air pressure sensor and the target air pressure.

[0018] Wherein, the air cavity further includes an alarm unit, and the alarm unit is used to issue an alarm when the air pressure value is lower than a preset value.

[0019] In a second aspect, the present invention further provides a method for detecting the motion posture of a rail transit vehicle, comprising installing a detection device at a designated position of the rail transit vehicle;

[0020] When the vehicle runs on the track, it will cause the longitudinal change of the vehicle body. At this time, the sliding sleeves in the front and rear attitude detectors will produce relative displacement with the change of the vehicle body attitude, pushing the support plate to compress or stretch the support spring, causing the pressure on the pressure sensor to change and obtain the longitudinal air pressure change value;

[0021] When the vehicle passes a curve or tilts due to track unevenness, the balls in the left and right attitude detectors will shift to the lower side due to gravity, thereby driving the sliding plates on both sides to slide along the guide groove. The movement of the sliding plates pushes the connecting plates in the air cavity through the connecting rod, changing the volume of the gas inside the air cavity and causing the air pressure to change, thus obtaining the lateral air pressure change value;

[0022] The air pressure regulator obtains the corresponding target air pressure value by looking up the table based on the real-time speed information provided by the vehicle speed acquisition unit, and compares it with the actual air pressure measured by the current air pressure sensor. The air pressure adjustment unit controls the inflation valve to perform inflation or exhaust operations, so that the air cavity is always maintained within the optimal working air pressure range.

[0023] The present invention provides a device and method for detecting the motion posture of a rail transit vehicle. A mounting plate supports and secures the entire detection device, ensuring its stability and adjustability. Front and rear posture detectors detect changes in the vehicle's longitudinal (i.e., travel) posture, while left and right posture detectors detect changes in the vehicle's lateral posture, such as roll angle. The mounting plate body serves as the basic structure of the entire device, supporting other components and securing it to the vehicle body. A rotating support platform is mounted on the mounting plate body and can be rotated and adjusted within a certain range to allow the device to be leveled. An outer ring rack is provided on the outer edge of the rotating support platform, meshing with a gear mounted on the mounting plate body. Rotating an adjustment handle drives the gear, enabling precise adjustment of the rotating support platform's angle. The adjustment handle is directly connected to the gear, allowing the operator to manually rotate the handle to control the gear's rotation, thereby driving the rotating support platform for angle adjustment. This provides simple operation and high adjustment accuracy. A damping ring is mounted on one side of the rotating support platform to provide appropriate rotational resistance, preventing angular deviation caused by vibration or external interference, and ensuring device stability during detection. A spirit level is embedded in or fixed to the mounting plate body to assist in determining whether the mounting plate is level, ensuring the accuracy of the test data. The fore-aft attitude detector, mounted on the rotating support platform, dynamically detects the vehicle's fore-aft attitude. The left-right attitude detector, further mounted above the fore-aft attitude detector, independently detects changes in the vehicle's lateral attitude, based on the fore-aft attitude. This allows for more accurate dynamic attitude detection and improves detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural diagram of a device for detecting the motion posture of a rail transit vehicle according to the present invention.

[0026] Figure 2 This is a right side structural diagram of a device for detecting the motion posture of a rail transit vehicle according to the present invention.

[0027] Figure 3 This is a first cross-sectional structural diagram of a device for detecting the motion posture of a rail transit vehicle according to the present invention.

[0028] Figure 4 This is a second cross-sectional structural diagram of a device for detecting the motion posture of a rail transit vehicle according to the present invention.

[0029] Figure 5 It is a side view of a device for detecting the motion posture of a rail transit vehicle according to the present invention.

[0030] Figure 6 This is a third cross-sectional structural diagram of a device for detecting the motion posture of a rail transit vehicle according to the present invention.

[0031] Mounting plate body 104, rotating support platform 105, adjusting handle 106, gear 107, damping ring 108, spirit level 109, outer ring rack 110, damping ring body 111, clamping screw 112, anti-slip pad 113, sliding sleeve 114, support plate 115, support spring 116, pressure sensor 117, dust cover 118, connecting ring 119, sphere 120, sliding plate 121, connecting rod 122, air cavity 123, air pressure sensor 124, sliding plate body 125, guide rod 126, ball 127, air cavity body 128, connecting plate 129, flexible connecting belt 130, inflation valve 131, air pressure regulator 132, vehicle speed acquisition unit 133, target air pressure acquisition unit 134, air pressure adjustment unit 135, alarm unit 136. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0034] First embodiment

[0035] See also Figures 1 to 6 The present invention provides a device for detecting the motion posture of a rail transit vehicle, including a mounting plate, a front-to-back posture detector and a left-to-right posture detector; the mounting plate includes a mounting plate body 104, a rotating support platform 105, an adjusting handle 106, a gear 107, a damping ring 108 and a spirit level 109, the rotating support platform 105 has an outer ring rack 110, the rotating support platform 105 is rotatably set on the mounting plate body 104, the gear 107 is rotatably set on the mounting plate body 104 and meshes with the outer ring rack 110, the adjusting handle 106 is connected to the gear 107, the damping ring 108 is set on one side of the rotating support platform 105, and the spirit level 109 is set on the mounting plate body 104; the front-to-back posture detector is set on the rotating support platform 105, and the left-to-right posture detector is on the front-to-back posture detector.

[0036] In this embodiment, the mounting plate supports and secures the entire detection device, ensuring its stability and adjustability. The front and rear attitude detectors detect changes in the vehicle's longitudinal (i.e., driving) attitude, while the left and right attitude detectors detect changes in the vehicle's lateral attitude, such as roll angle. The mounting plate body 104 serves as the basic structure of the entire device, supporting other components and securing it to the vehicle. A rotating support platform 105 is mounted on the mounting plate body 104 and can be rotated and adjusted within a certain range to allow the device to be leveled. An outer ring rack 110 is provided on the outer edge of the rotating support platform 105, which is meshed with a gear 107 mounted on the mounting plate body 104. Rotating the gear 107 drives the gear 107, allowing precise adjustment of the angle of the rotating support platform 105. The adjustment handle 106 is directly connected to the gear 107. The operator can manually rotate the adjustment handle 106 to control the rotation of the gear 107, thereby driving the rotating support platform 105 for angle adjustment. This provides simple operation and high adjustment accuracy. The damping ring 108 is arranged on one side of the rotating support platform 105 to provide appropriate rotational resistance, prevent angular deviation caused by vibration or external interference, and ensure the stability of the device during the detection process. The spirit level 109 is embedded in or fixed on the mounting plate body 104 to assist in determining whether the mounting plate is in a horizontal state and ensure the accuracy of the detection data. The front and rear posture detectors are installed on the rotating support platform 105 to realize dynamic detection of the vehicle's front and rear posture. The left and right posture detectors are further arranged above the front and rear posture detectors, and can independently detect the vehicle's lateral posture changes based on the front and rear posture. This allows for more accurate dynamic posture detection and improved detection accuracy.

[0037] The damping ring 108 includes two damping ring bodies 111, a clamping screw 112 and two anti-slip pads 113. The two damping ring bodies 111 are slidably arranged on the mounting plate body 104 and are located on both sides of the rotating support platform 105. The clamping screw 112 has two opposite sections of threads. The clamping screw 112 is threadedly connected to the two damping ring bodies 111. The anti-slip pad 113 is arranged on one side of the damping ring body 111.

[0038] The damping ring 108 is an auxiliary structure used to adjust the rotational resistance of the rotating support platform 105. Its function is to apply appropriate friction to prevent uncontrolled deflection of the rotating support platform 105 due to vibration or external forces during the detection process, thereby improving the stability of the device and the accuracy of the detection results. The damping ring 108 includes two symmetrically arranged damping ring bodies 111, a clamping screw 112, and two anti-slip pads 113.

[0039] The two damping ring bodies 111 are made of a high-friction material, such as rubber or engineering plastic, and are capable of close contact with the sides of the rotating support platform 105 and generating sufficient damping. They are mounted on the mounting plate body 104 in a sliding fit, one on each side of the rotating support platform 105, forming a symmetrical clamping structure.

[0040] A clamping screw 112 extends between the two damping ring bodies 111 and is threadedly connected thereto. This clamping screw 112 has two sections of threaded threads with opposite rotation directions: one end is right-handed and the other is left-handed, respectively. These threads connect to the left and right damping ring bodies 111. When the operator rotates the clamping screw 112, the two damping ring bodies 111 move synchronously closer or farther away, enabling precise adjustment of the clamping force on the rotating support platform 105.

[0041] Each damping ring body 111 is equipped with an anti-slip pad 113 on the side facing the rotating support 105. Made of a flexible, wear-resistant material, these pads offer excellent friction and cushioning properties. Their primary function is to create a reliable frictional contact surface between the damping ring body 111 and the rotating support 105, preventing slippage while also reducing wear on the surface of the rotating support 105 and extending the life of the equipment.

[0042] The front and rear posture detector includes a sliding sleeve 114, a support plate 115, a support spring 116 and a pressure sensor 117. The sliding sleeve 114 has a cavity. The sliding sleeve 114 is slidably set on the rotating support platform 105. The support plate 115 is slidably set on one side of the sliding sleeve 114. The support spring 116 is set on one side of the support plate 115 for supporting the support plate 115. The pressure sensor 117 is set on one side of the support spring 116.

[0043] The sliding sleeve 114 has a hollow cavity structure inside and is slidably mounted on the rotating support 105. The sliding sleeve 114 can slide back and forth on the rotating support 105, thereby quickly responding to changes in the longitudinal posture of the vehicle caused by acceleration and deceleration during driving.

[0044] A support plate 115 is provided on one side of the sliding sleeve 114. This support plate 115 is also embedded within or on the side of the sliding sleeve 114 using a sliding fit, allowing for axial movement within a certain range. A support spring 116 is provided on the other side of the support plate 115. This spring serves as an elastic reset element, with one end fixed to the sliding sleeve 114 or the detector body and the other end connected to the support plate 115. A pressure sensor 117 is positioned on one side of the support spring 116 to detect changes in pressure on the support plate 115 in real time. When the vehicle pitches, the sliding sleeve 114 undergoes relative displacement as the vehicle's posture changes, pushing the support plate 115 to compress or stretch the support spring 116, causing changes in the pressure on the pressure sensor 117. By collecting and analyzing the signals output by the pressure sensor 117, the vehicle's current longitudinal posture and its changing trends can be inferred, enabling precise posture monitoring.

[0045] The front-back posture detector further includes a dustproof cover 118 and a connecting ring 119 . The dustproof cover 118 is arranged on the outside of the sliding cover 114 . The connecting ring 119 is fixed to the rotating support platform 105 and connected to the dustproof cover 118 .

[0046] To enhance the detector's environmental adaptability and service life, the front-to-back attitude detector also includes a dustproof boot 118 and a connecting ring 119. Dustproof boot 118 fits over the sliding sleeve 114 and is made of a flexible, weather-resistant material such as silicone or rubber. It offers excellent sealing and aging resistance, effectively preventing dust, rainwater, and other impurities from entering the sliding sleeve 114, potentially affecting its sliding performance and the sensor's measurement accuracy.

[0047] The connecting ring 119 is used to achieve a fixed connection between the dustproof sleeve 118 and the rotating support platform 105. One end of the connecting ring 119 is fixedly connected to the rotating support platform 105, and the other end is tightly connected to the top or middle of the dustproof sleeve 118 to form a stable sealing structure.

[0048] The left and right posture detector includes a sphere 120, two sliding plates 121, two connecting rods 122, two air cavities 123 and two air pressure sensors 124. The sphere 120 is slidably arranged in the cavity of the sliding sleeve 114, the two sliding plates 121 are slidably arranged on both sides of the sphere 120, the two connecting rods 122 are respectively connected to the two sliding plates 121, and are respectively connected to the two air cavities 123, and the two air pressure sensors 124 are respectively arranged on the two air cavities 123.

[0049] The sphere 120 is a freely movable component of a certain mass, preferably made of metal or engineering plastic with uniform density, a smooth surface, and good wear resistance. Sliding within the cavity of the sliding sleeve 114 in the front and rear attitude detectors, the sphere 120 is able to move freely laterally within the cavity. When the vehicle tilts left or right, gravity causes the sphere 120 to shift toward the lower side, triggering a corresponding displacement of the connected sliding plate 121.

[0050] Each sliding plate 121 is located on the left and right sides of the sphere 120, and is symmetrically distributed. A certain contact pressure is maintained between the sphere 120 to ensure that the movement of the sphere 120 can effectively drive the sliding plates 121 to move synchronously. Two connecting rods 122 are respectively connected to the sliding plates 121 on the left and right sides, and extend to the inside of the corresponding air cavity 123. The end of each connecting rod 122 is connected to the sealing piston in the air cavity 123. When the sliding plate 121 is displaced due to the movement of the sphere 120, the connecting rod 122 will push the piston to compress the gas volume in the air cavity 123, causing the air pressure inside the air cavity 123 to change. The air pressure change is collected in real time by the air pressure sensor 124 installed on the air cavity 123 and converted into an electrical signal output, thereby inverting the current lateral tilt angle of the vehicle.

[0051] The air cavity 123 is a closed structure, filled with inert gas or air, and has good air tightness and stability; the air pressure sensor 124 uses a high-precision, high-stability miniature pressure sensing element, which has the characteristics of fast response and strong anti-interference ability, and can accurately capture tiny pressure fluctuations, thereby achieving accurate measurement of changes in the vehicle's lateral posture.

[0052] The sliding plate 121 includes a sliding plate body 125, a guide rod 126 and a plurality of balls 127. The guide rod 126 is fixedly connected to the sliding plate body 125 and is located in a guide groove in the sliding sleeve 114. The plurality of balls 127 are arranged between the guide rod 126 and the guide groove.

[0053] The sliding plate body 125 serves as a load-bearing structural member, fixedly connected to the connecting rod 122. A guide rod 126 is fixedly mounted on one side of the sliding plate body 125 and extends into a guide groove within the sliding sleeve 114. This guide rod 126 guides the sliding plate 121 along a predetermined linear trajectory, preventing deflection or jamming. Multiple ball bearings 127 are embedded between the guide rod 126 and the guide groove, providing rolling support and significantly reducing friction during sliding, thereby improving smoothness and responsiveness.

[0054] The air cavity 123 includes an air cavity body 128, a connecting plate 129, a flexible connecting belt 130, an inflation valve 131 and an air pressure regulator 132. The air cavity body 128 is fixed on one side of the sliding sleeve 114. The connecting plate 129 closes the air cavity body 128 through the flexible connecting belt 130. The connecting rod 122 is connected to the connecting plate 129. The inflation valve 131 is connected to the air cavity body 128. The air pressure regulator 132 is connected to the inflation valve 131.

[0055] The air chamber body 128 is a sealed container, typically made of high-strength metal or pressure-resistant engineering plastic. It offers excellent airtightness and fatigue resistance, and can withstand repeated pressure fluctuations without deformation or leakage. The air chamber body 128 is fixedly mounted on one side of the sliding sleeve 114, strategically positioned to facilitate interaction with the connecting rod 122 and other components.

[0056] The connecting plate 129 closes one end of the air cavity body 128 through the flexible connecting belt 130, forming a relatively movable sealing structure. The flexible connecting belt 130 is made of a highly elastic and aging-resistant material (such as rubber or silicone composite film), which has good elasticity and sealing performance. It can maintain the closed state inside the air cavity 123 when the connecting plate 129 moves with the connecting rod 122, while allowing displacement changes within a certain range. One end of the connecting rod 122 is connected to the sliding plate 121, and the other end is fixed to the connecting plate 129. When the sliding plate 121 is laterally displaced due to the offset of the sphere 120, the connecting plate 129 will push the piston structure to compress or stretch the gas volume in the air cavity 123, thereby causing the air pressure to change.

[0057] To set and dynamically adjust the initial pressure within air cavity 123, air cavity 123 also includes an inflation valve 131 and an air pressure regulator 132. The inflation valve 131 is located on and communicates with the interior of the air cavity body 128 and is used to inject gas into or release excess gas from the air cavity 123 to adjust the internal pressure to the desired level. The air pressure regulator 132 is connected to the inflation valve 131, forming a closed-loop control system that automatically adjusts the air pressure within air cavity 123 based on real-time operating conditions, keeping it within the optimal operating range.

[0058] The air pressure regulator 132 includes a vehicle speed acquisition unit 133, a target air pressure acquisition unit 134 and an air pressure adjustment unit 135; the vehicle speed acquisition unit 133 is used to obtain the moving speed of the rail transit vehicle; the target air pressure acquisition unit 134 is used to obtain the target air pressure used by the corresponding air cavity 123 based on the moving speed lookup table; the air pressure adjustment unit 135 is used to adjust the inflation valve 131 based on the difference between the current air pressure value obtained by the air pressure sensor 124 and the target air pressure.

[0059] The vehicle speed acquisition unit 133 is used to obtain the current speed of the rail transit vehicle in real time. This information can be obtained through the train control system or onboard sensors and serves as an important reference for subsequent air pressure adjustment. The target air pressure acquisition unit 134 uses a table lookup based on the vehicle speed to determine the target air pressure to be maintained in the corresponding air cavity 123. Because the vehicle's posture detection sensitivity is higher when traveling at high speeds, a higher initial air pressure is required to improve response speed. At low speeds or when parked, the air pressure can be appropriately lowered to reduce energy consumption and avoid malfunctions. This unit performs a match query using a preset speed-air pressure comparison table and outputs the corresponding target air pressure. The air pressure adjustment unit 135 controls the opening and closing of the inflation valve 131 based on the difference between the current air pressure value detected by the air pressure sensor 124 and the target air pressure, automatically adjusting the air pressure within the air cavity 123. If the current air pressure is below the target value, inflation is initiated; if it is above the target value, exhaust is performed appropriately, ensuring that the system is always in optimal working condition.

[0060] The air cavity 123 further includes an alarm unit 136 , and the alarm unit 136 is configured to issue an alarm when the air pressure value is lower than a preset value.

[0061] The alarm unit 136 continuously monitors the air pressure inside the air cavity 123 and triggers an alarm signal when the air pressure is lower than a preset safety threshold, reminding maintenance personnel to promptly check for air leaks, sensor failures or other abnormal conditions to prevent posture detection errors or even system failures caused by insufficient air pressure.

[0062] In summary, air cavity 123 not only serves as a key pressure-sensing element in the left-right attitude detector but also integrates intelligent adjustment and safety warning functions, significantly enhancing the adaptability, stability, and intelligence of the detection device. Through the closed-loop control mechanism of air pressure regulator 132, the detection system maintains excellent response characteristics and measurement accuracy under various vehicle speeds and operating environments, providing more reliable and accurate lateral attitude monitoring for rail transit vehicles.

[0063] Second embodiment

[0064] The present invention also provides a method for detecting the motion posture of a rail transit vehicle, which adopts the above-mentioned device for detecting the motion posture of a rail transit vehicle.

[0065] First, install the detection device at a designated location on a rail transit vehicle (such as the underbody or bogie connection), ensuring it is securely connected and level. Adjusting the adjustment knob 106 on the mounting plate rotates the gear 107, which in turn drives the rotating support 105 to a horizontal position. The level gauge 109 on the mounting plate body 104 assists in confirming the device's ideal horizontal reference state. Simultaneously, set the initial pressure of the air chamber 123 based on the vehicle's operating parameters, and complete inflation and pressure setting via the air pressure regulator 132.

[0066] When a vehicle travels on a track, acceleration, deceleration, or traversing up or downhill slopes causes longitudinal changes in the vehicle body. As the vehicle body's posture changes, the sliding sleeves 114 in the front and rear attitude detectors move relative to each other, pushing the support plate 115 to compress or stretch the support spring 116, causing the pressure on the pressure sensor 117 to change. By collecting the longitudinal pressure changes output by the pressure sensor 117 and combining them with a preset calibration curve, the current longitudinal pitch angle of the vehicle can be calculated.

[0067] In addition, the design of the dustproof cover 118 and the connecting ring 119 effectively prevents the influence of the external environment on the sliding components, thereby improving the stability and reliability of the measurement data.

[0068] When the vehicle negotiates a curve or tilts due to track irregularities, the spheres 120 in the left and right attitude sensors shift toward the lower side due to gravity, driving the sliding plates 121 on either side to slide along the guide grooves. The movement of the sliding plates 121 pushes the connecting plates 129 in the air chamber 123 via the connecting rods 122, changing the volume of air within the air chamber 123 and causing a change in air pressure. Two air pressure sensors 124 measure the lateral pressure changes within the left and right air chambers 123, respectively, and transmit the difference signal to the control system, which determines the vehicle's current lateral tilt angle.

[0069] During this process, the ball 127 structure reduces the sliding friction resistance and improves the sliding response speed; the flexible connecting belt 130 ensures the sealing of the air cavity 123 while allowing a certain range of deformation, thereby enhancing the adaptability of the system.

[0070] In order to ensure that the detection accuracy is not affected by changes in vehicle speed, the air pressure regulator 132 looks up the table to obtain the corresponding target air pressure value based on the real-time speed information provided by the vehicle speed acquisition unit 133, and compares it with the actual air pressure measured by the current air pressure sensor 124. The air pressure adjustment unit 135 controls the inflation valve 131 to perform inflation or exhaust operations, so that the air cavity 123 is always maintained within the optimal working air pressure range.

[0071] This closed-loop air pressure regulation mechanism can effectively avoid misjudgments caused by air pressure fluctuations and improve the stability and consistency of the system under different operating conditions.

[0072] The system continuously monitors the air pressure status in the air cavity 123. Once the air pressure value is found to be lower than the set safety threshold, the alarm unit 136 immediately sends an alarm signal to prompt maintenance personnel to check and handle it, so as to prevent posture detection distortion caused by problems such as air leakage and sensor failure, and ensure the safety of train operation.

[0073] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A device for detecting the motion posture of a rail transit vehicle, characterized in that: It includes a mounting plate, a front-to-back attitude detector, and a left-to-right attitude detector; The mounting plate includes a mounting plate body, a rotating support platform, an adjusting handle, a gear, a damping ring and a spirit level, wherein the rotating support platform has an outer ring rack, the rotating support platform is rotatably arranged on the mounting plate body, the gear is rotatably arranged on the mounting plate body and meshes with the outer ring rack, the adjusting handle is connected to the gear, the damping ring is arranged on one side of the rotating support platform, and the spirit level is arranged on the mounting plate body; The front-to-back posture detector is arranged on the rotating support platform, and the left-right posture detector is on the front-to-back posture detector; the front-to-back posture detector includes a sliding sleeve, and the sliding sleeve has a cavity; The left and right posture detector includes a sphere, two sliding plates, two connecting rods, two air cavities and two air pressure sensors. The sphere is slidably arranged in the cavity of the sliding sleeve, the two sliding plates are slidably arranged on both sides of the sphere, the two connecting rods are respectively connected to the two sliding plates and respectively connected to the two air cavities, and the two air pressure sensors are respectively arranged on the two air cavities; the air cavity includes an air cavity body, a connecting plate, a flexible connecting belt, an inflation valve and an air pressure regulator, the air cavity body is fixed to one side of the sliding sleeve, the connecting plate closes the air cavity body through a flexible connecting belt, the connecting rod is connected to the connecting plate, the inflation valve is communicated with the air cavity body, and the air pressure regulator is communicated with the inflation valve; the air pressure regulator includes a vehicle speed acquisition unit, a target air pressure acquisition unit and an air pressure adjustment unit; The vehicle speed acquisition unit is used to acquire the moving speed of the rail transit vehicle; The target air pressure acquisition unit is configured to obtain the target air pressure used by the corresponding air cavity based on the moving speed by looking up a table; The air pressure adjustment unit is used to adjust the inflation valve based on the difference between the current air pressure value obtained by the air pressure sensor and the target air pressure.

2. A device for detecting the motion posture of a rail transit vehicle according to claim 1, characterized in that: The damping ring includes two damping ring bodies, a clamping screw and two anti-slip pads. The two damping ring bodies are slidably arranged on the mounting plate body and are located on both sides of the rotating support platform. The clamping screw has two opposite sections of threads. The clamping screw is threadedly connected to the two damping ring bodies. The anti-slip pad is arranged on one side of the damping ring body.

3. A device for detecting the motion posture of a rail transit vehicle according to claim 2, characterized in that: The front and rear posture detector also includes a support plate, a support spring and a pressure sensor. The sliding sleeve is slidably arranged on the rotating support platform, the support plate is slidably arranged on one side of the sliding sleeve, the support spring is arranged on one side of the support plate for supporting the support plate, and the pressure sensor is arranged on one side of the support spring.

4. A device for detecting the motion posture of a rail transit vehicle according to claim 3, characterized in that: The front-back posture detector further comprises a dustproof cover and a connecting ring. The dustproof cover is arranged on the outside of the sliding cover. The connecting ring is fixed to the rotating support platform and connected to the dustproof cover.

5. The device for detecting the motion posture of a rail transit vehicle according to claim 4, wherein: The sliding plate includes a sliding plate body, a guide rod and a plurality of balls. The guide rod is fixedly connected to the sliding plate body and is located in a guide groove in the sliding sleeve. The plurality of balls are arranged between the guide rod and the guide groove.

6. A device for detecting the motion posture of a rail transit vehicle according to claim 5, characterized in that: The air cavity further includes an alarm unit, which is used to issue an alarm when the air pressure value is lower than a preset value.

7. A method for detecting the motion posture of a rail transit vehicle, using a device for detecting the motion posture of a rail transit vehicle according to any one of claims 1 to 6, characterized in that: include: Install the detection device at a designated location on the rail transit vehicle; When the vehicle runs on the track, it will cause the longitudinal change of the vehicle body. At this time, the sliding sleeves in the front and rear attitude detectors will produce relative displacement with the change of the vehicle body attitude, pushing the support plate to compress or stretch the support spring, causing the pressure on the pressure sensor to change and obtain the longitudinal air pressure change value; When the vehicle passes a curve or tilts due to track unevenness, the balls in the left and right attitude detectors will shift to the lower side due to gravity, thereby driving the sliding plates on both sides to slide along the guide groove. The movement of the sliding plates pushes the connecting plates in the air cavity through the connecting rod, changing the volume of the gas inside the air cavity and causing the air pressure to change, thus obtaining the lateral air pressure change value; The air pressure regulator obtains the corresponding target air pressure value by looking up the table based on the real-time speed information provided by the vehicle speed acquisition unit, and compares it with the actual air pressure measured by the current air pressure sensor. The air pressure adjustment unit controls the inflation valve to perform inflation or exhaust operations, so that the air cavity is always maintained within the optimal working air pressure range.

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