Speed intelligent sensor detection device and method for fuxing bullet train set

Abstract

The present application relates to train detection accessory technical field, specifically, it is intelligent sensor detection device and method for speed of Fuxing Hao motor train unit, including the detection mechanism installed in the axle box of the bottom of motor train unit, its inside is equipped with speed measurement module, and the speed measurement module includes speed sensor, contact type position sensor and control box, the speed measurement module is arranged in the detection box, and the detection box is equipped with recovery mechanism. The intelligent sensor detection device and method for speed of Fuxing Hao motor train unit, through motor drive screw rod, drive slider and pressboard move back and forth, and then through connecting rod mechanism control mounting plate's extension and shrink, realize the positioning and recovery of speed sensor, simultaneously, the lower convex rod of mounting plate bottom and the bending groove on baffle cooperate, drive two baffle move towards when speed sensor shrink, close detection box front end opening, prevent speed sensor continue to measure speed, and reduce the use of additional driving element, improve the reliability of system.

Description

Technical Field

[0001] This invention relates to the field of train inspection accessories technology, and more specifically, to a speed intelligent sensor detection device and method for Fuxing bullet trains. Background Technology

[0002] The intelligent speed sensor on the Fuxing bullet train uses high-precision magnetoelectric or laser measurement technology to monitor the train's speed in real time and transmit the data to the control system. This sensor has the ability to provide core data support for train safety protection, precise stopping, and energy-saving optimization, effectively ensuring the intelligent and efficient operation of the high-speed rail system.

[0003] Patent application number CN201810874945.4 discloses a high-speed wheelset online detection device and method. The detection device is installed on all wheelsets on the train. Sensors collect wheelset operation data in real time. A microcontroller analyzes and processes the collected data and transmits the processing results to the control center in real time. The original data is transmitted to the service station data center after the train enters the station, and the stored data is deleted from the memory. This high-speed wheelset online detection device monitors parameters such as temperature, acceleration, vibration and noise, and compares the monitoring data with the original database through a microcontroller, realizing comprehensive monitoring of the train and wheelset operation.

[0004] However, in terms of structural design, the speed detection equipment of existing Fuxing bullet trains mostly uses fixed, exposed speed sensors or requires independent drive mechanisms for protection. This not only makes them susceptible to impacts, contamination, and damage during operation, leading to inaccurate measurements or malfunctions, but also increases the complexity and manufacturing cost of the system. Secondly, in terms of operation and maintenance, there is a lack of effective real-time status monitoring and intelligent diagnostic functions, making it impossible to provide early warnings of speed sensor signal degradation. Replacement can only be done passively after a malfunction occurs. This not only significantly increases the risk of sudden shutdowns and maintenance costs, but also poses a potential hazard to driving safety.

[0005] In view of this, we propose a speed intelligent sensor detection device and method for Fuxing bullet trains. Summary of the Invention

[0006] The purpose of this invention is to provide a speed intelligent sensor detection device and method for Fuxing high-speed trains. The device uses a motor to drive a lead screw, which moves a slider and a pressure plate back and forth. Then, a linkage mechanism controls the extension and retraction of the mounting plate to achieve the positioning and retrieval of the speed sensor, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The Fuxing bullet train speed intelligent sensor detection device includes a detection mechanism installed in the axle box at the bottom of the bullet train, which contains a speed measurement module. The speed measurement module includes a speed sensor, a contact position sensor, and a control box. The speed measurement module is located inside the detection box, which also contains a retrieval mechanism.

[0009] The detection box includes a box body with an opening at the front end and two symmetrically distributed baffles. A bending groove is provided on the bottom horizontal plate of the baffle.

[0010] The recycling mechanism includes a motor, a lead screw driven by the motor, a slider sleeved on the outside of the lead screw, a pressure plate disposed at the bottom of the slider, and a mounting plate that moves with the pressure plate to fix the speed sensor. The mounting plate has a pair of inner supports inside, and two protruding rods are provided on the bottom surface of the mounting plate.

[0011] After the motor starts, it drives the lead screw to rotate, which in turn moves the slider and the pressure plate. After the pressure plate moves forward, it drives a pair of inner supports to extend outward, thus fixing the mounting plate inside the box. After the pressure plate moves backward, the mounting plate drives the speed sensor to retract into the box and drives the lower convex rod to move along the bending groove, causing the two baffles to seal the front opening of the box.

[0012] In the technical solution of the present invention, the front end of the box body is provided with a sliding groove with an L-shaped longitudinal cross section, and the inner bottom surface of the box body is provided with two limiting grooves that communicate with the sliding groove. The baffle has an L-shaped longitudinal cross section and slides inside the sliding groove.

[0013] In the technical solution of the present invention, the detection box further includes a partition integrally formed on the inner wall of the box, a cover plate disposed at the rear end of the box, and a pair of lifting lugs disposed on the outer walls of the left and right ends of the box near the bottom.

[0014] In the technical solution of the present invention, a through groove is provided on the top surface of the partition, the cover plate is fixedly connected to the rear side wall of the box by screws, and the lifting lug is welded and fixed to the box.

[0015] The aforementioned baffles are moved in opposite directions to prevent the speed measuring module from continuing to measure speed.

[0016] In the technical solution of the present invention, the probe of the speed sensor is provided with a threaded groove on the outside, and a nut for fixing the speed sensor is provided on the outside of the threaded groove. The contact position sensor and the control box are both fixedly connected to the box body by screws.

[0017] This setup, by adding a contact position sensor in conjunction with the system's self-diagnostic algorithm, upgrades the sensor from a passive component into a predictable and manageable intelligent asset, achieving a leap from replacing it after it breaks down to managing it before it breaks down, significantly improving the system's availability and security.

[0018] In the technical solution of the present invention, the motor is fixedly connected to the top surface of the partition by screws, one end of the lead screw is coaxially connected to the motor and the other end is rotatably connected to the inner wall of the box, the slider is slidably connected to the inside of the through groove on the plate, and the slider is threadedly connected to the lead screw.

[0019] In the technical solution of the present invention, the pressure plate is snapped and fixed on the bottom surface of the slider. The pressure plate has a through circular hole with a diameter larger than that of the speed sensor probe. The mounting plate is slidably connected to the inside of the box. The two ends of the mounting plate have external through grooves with an L-shaped cross section. The bottom end of the lower protrusion passes through the limiting groove and extends into the inside of the bending groove.

[0020] The above setup adjusts the position of the speed sensor by changing the position of the mounting plate, and then synchronously drives the two baffles to move towards each other after the sensor retracts into the housing, thus reducing the investment in additional drive equipment.

[0021] In the technical solution of the present invention, the inner support part includes a slide rod slidably connected to the outer through groove, a pair of telescopic rods snapped and fixed to the outer wall of the slide rod, a spring sleeved on the outside of the telescopic rod, and an inner support plate slidably connected to the outer through groove. The inner support plate is snapped and fixed to the ends of the two telescopic rods.

[0022] In the technical solution of the present invention, the recycling mechanism further includes a connecting rod rotatably connected between the outer wall protrusion of the pressure plate and the outer wall protrusion of the slide bar.

[0023] The above settings are used to limit the fixed position of the mounting plate inside the housing, while ensuring that the end of the speed sensor is close to the shaft end gear inside the axle box.

[0024] On the other hand, the present invention also provides a method for detecting the speed of a Fuxing high-speed train using an intelligent speed sensor, which includes the following steps using the aforementioned Fuxing high-speed train intelligent speed sensor detection device:

[0025] Before the S1 and Fuxing bullet trains are put into operation, several testing mechanisms are installed in several axle boxes at the bottom of the train. The motor is started to drive the lead screw to rotate, which drives the slider and pressure plate to move forward. The tilt angle of the connecting rod changes, which in turn drives the inner support to move outward inside the outer through groove of the mounting plate.

[0026] S2. After the inner support plate comes into contact with the inner wall of the box, the slide rod continues to move outward, and the spring is compressed and increases its own elastic potential energy. The spring force acts on the inner support plate, thereby limiting the fixed position of the mounting plate in the box and ensuring that the end of the speed sensor is close to the shaft end gear inside the axle box.

[0027] S3. During operation, the high-speed gears at the axle end of the Fuxing bullet train rotate at high speed. The magnetic element inside the Hall effect speed sensor periodically approaches and moves away from the tooth tip and tooth groove of the axle end gear, disturbing the magnetic field and generating a pulse electrical signal whose frequency is strictly proportional to the rotational speed. This signal is transmitted through the control box to the signal processing unit inside the bullet train, where the signal is filtered, shaped, and digitized. By accurately calculating the pulse frequency and combining it with the number of teeth of the gear and the circumference of the wheel, the real-time speed of the Fuxing bullet train is calculated.

[0028] S4. During the operation of the Fuxing bullet train, the signal processing unit detects the signal transmitted by the speed sensor in real time. The system's self-diagnosis algorithm continuously evaluates the pulse electrical signal. When it detects that the pulse signal jitter has increased or that the pulse signal is lost or exceeds the tolerance, it sends a retraction command to the control box.

[0029] S5. When the motor drives the lead screw to rotate in the opposite direction and the slider and pressure plate move backward, it first drives the structure of the inner support to reset, and then pulls the mounting plate with the speed sensor to retract into the interior of the box. At this time, the lower protrusion at the bottom of the mounting plate moves along the bending groove, which drives the two baffles to move towards each other, thereby closing the opening at the front end of the box.

[0030] S6. Next, after the mounting plate comes into contact with the contact position sensor, it feeds back the current status of the mounting plate to the control box to ensure that the action is performed in place. The signal processing unit reports the information of the target detection mechanism to the train operator based on the warning status and fault status.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. The Fuxing bullet train speed intelligent sensor detection device and method uses a motor to drive a lead screw, which moves a slider and a pressure plate back and forth. Then, a linkage mechanism controls the extension and retraction of the mounting plate to achieve the positioning and retrieval of the speed sensor. At the same time, the lower protrusion at the bottom of the mounting plate cooperates with the bending groove on the baffle to drive the two baffles to move towards each other when the speed sensor retracts, closing the front opening of the detection box and preventing the speed sensor from continuing to measure speed. This reduces the use of additional driving components and improves the reliability of the system.

[0033] 2. The intelligent speed sensor detection device and method for the Fuxing bullet train uses a contact position sensor and a self-diagnostic algorithm in the signal processing unit to monitor the quality of the pulse signal output by the speed sensor in real time. Once abnormal states such as signal jitter, loss, or out-of-tolerance are detected, a recovery command is immediately triggered, causing the speed sensor to retract and feed back status information. This realizes the transformation of the operation and maintenance mode from replacement after a fault to early warning before a fault occurs, which greatly improves the monitoring accuracy and system safety during the operation of the bullet train, while reducing the risk of sudden shutdown and maintenance costs. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure and installation position of the present invention;

[0035] Figure 2 This is a cross-sectional schematic diagram of the detection mechanism in this invention;

[0036] Figure 3 This is a cross-sectional schematic diagram of the detection box in this invention;

[0037] Figure 4 This is a schematic diagram of the baffle structure in this invention;

[0038] Figure 5 This is a schematic diagram of the speed measuring module in this invention;

[0039] Figure 6 This is a schematic diagram of the recycling mechanism in this invention;

[0040] Figure 7 This is a schematic diagram of the mounting plate in this invention;

[0041] Figure 8 This is a schematic diagram of the internal support portion in this invention;

[0042] Figure 9 This is a schematic diagram illustrating the principle of internal mechanism adjustment in the recycling mechanism of this invention;

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Detection mechanism; 110. Detection box; 111. Box body; 1110. Slide groove; 1111. Limiting groove; 112. Partition; 1120. Plate surface through groove; 113. Baffle; 1130. Bending groove; 114. Cover plate; 115. Lifting lug; 120. Speed ​​measuring module; 121. Speed ​​sensor; 122. Contact position sensor; 123. Control box; 130. Recycling mechanism; 131. Motor; 132. Lead screw; 133. Slider; 134. Pressure plate; 135. Connecting rod; 136. Mounting plate; 1360. External through groove; 1361. Lower protruding rod; 137. Internal support part; 1370. Slide rod; 1371. Telescopic rod; 1372. Spring; 1373. Internal support plate. Detailed Implementation

[0045] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0046] Please see Figures 1-4As shown, this embodiment provides a technical solution:

[0047] The Fuxing bullet train speed intelligent sensor detection device includes a detection mechanism 100 installed in the bottom axle box of the bullet train, which has a speed measuring module 120 inside; the speed measuring module 120 is set inside the detection box 110, and the detection box 110 has a recycling mechanism 130 inside.

[0048] Specifically, the detection box 110 includes a box body 111 with an opening at the front end and two symmetrically distributed baffles 113. A bending groove 1130 is provided on the bottom horizontal plate of the baffle 113.

[0049] Furthermore, the front end of the box body 111 is provided with a slide groove 1110 with an L-shaped longitudinal cross section, and two limiting grooves 1111 connected to the slide groove 1110 are provided on the inner bottom surface of the box body 111. The baffle 113 has an L-shaped longitudinal cross section and slides inside the slide groove 1110.

[0050] Furthermore, the test box 110 also includes a partition 112 integrally formed on the inner wall of the box body 111, a cover 114 disposed at the rear end of the box body 111, and a pair of lifting lugs 115 disposed on the outer walls of the left and right ends of the box body 111 near the bottom.

[0051] Furthermore, a through groove 1120 is provided on the top surface of the partition 112, and the cover plate 114 is fixedly connected to the rear side wall of the box body 111 by screws. The lifting lug 115 is welded and fixed to the box body 111.

[0052] Furthermore, the box 111 provides a placement area for the speed measuring module 120 and the recycling mechanism 130, the partition 112 is used to separate the internal area of ​​the box 111, and the plate groove 1120 is used to provide a sliding area for the internal structure of the recycling mechanism 130. This setting prevents the speed measuring module 120 from continuing to measure speed after the baffle 113 moves towards each other.

[0053] Please see Figures 5-9 As shown, in this embodiment, the speed measurement module 120 includes a speed sensor 121, a contact position sensor 122, and a control box 123.

[0054] Specifically, the probe of speed sensor 121 has a threaded groove on the outside, and a nut for fixing speed sensor 121 is provided on the outside of the threaded groove. The contact position sensor 122 and the control box 123 are both fixedly connected to the box body 111 by screws.

[0055] Furthermore, during the operation of the Fuxing bullet train, the signal processing unit monitors the signal transmitted by the speed sensor 121 in real time. The system's self-diagnostic algorithm continuously evaluates the pulse electrical signal. When it detects increased pulse signal jitter, loss of pulse signal, or exceeding tolerance, it sends a retraction command to the control box 123. Meanwhile, the contact position sensor 122 feeds back the current status of the speed sensor 121 to the control box 123 to ensure that the action is executed properly. The signal processing unit reports the information of the target detection mechanism 100 to the train operator based on the warning status and fault status. This setting, by adding the contact position sensor 122 in conjunction with the system's self-diagnostic algorithm, upgrades the sensor from a passive component to a predictable and manageable intelligent asset, realizing a leap from replacing it after it breaks down to managing it before it breaks down, significantly improving the system's availability and safety.

[0056] Please see Figures 1-9 As shown, in this embodiment, the recycling mechanism 130 includes a motor 131, a lead screw 132 driven by the motor 131, a slider 133 sleeved on the outside of the lead screw 132, a pressure plate 134 disposed at the bottom of the slider 133, and a mounting plate 136 that moves with the pressure plate 134 to fix the speed sensor 121. The mounting plate 136 has a pair of inner support parts 137 inside, and two lower protruding rods 1361 are provided on the bottom surface of the mounting plate 136.

[0057] Specifically, the motor 131 is fixedly connected to the top surface of the partition 112 by screws, one end of the lead screw 132 is coaxially connected to the motor 131, and the other end is rotatably connected to the inner wall of the box 111. The slider 133 is slidably connected to the inside of the plate through groove 1120, and the slider 133 is threadedly connected to the lead screw 132.

[0058] Furthermore, the pressure plate 134 is snapped and fixed to the bottom surface of the slider 133. The pressure plate 134 has a through-hole with a diameter larger than that of the probe of the speed sensor 121. The mounting plate 136 is slidably connected to the inside of the box 111. The two ends of the mounting plate 136 have external through grooves 1360 with an L-shaped cross section. The bottom end of the lower protrusion 1361 passes through the limiting groove 1111 and extends into the inside of the bending groove 1130.

[0059] Furthermore, the recycling mechanism 130 also includes a connecting rod 135 that is rotatably connected between the outer wall protrusion of the pressure plate 134 and the outer wall protrusion of the slide rod 1370.

[0060] Furthermore, after installing several detection mechanisms 100 on several shaft boxes at their bottom, the motor 131 starts and drives the lead screw 132 to rotate, causing the slider 133 and the pressure plate 134 to move. After the pressure plate 134 moves forward, the tilt angle of the connecting rod 135 changes, driving a pair of inner supports 137 to extend outward, thus fixing the mounting plate 136 inside the box 111. After the pressure plate 134 moves backward, the mounting plate 136 drives the speed sensor 121 to retract into the box 111 and drives the lower protrusion 1361 to move along the bending groove 1130, causing the two baffles 113 to block the front opening of the box 111. This setting adjusts the position of the speed sensor 121 by changing the position of the mounting plate 136, and after it retracts into the box 111, it synchronously drives the two baffles 113 to move towards each other, thereby reducing the investment in additional drive equipment.

[0061] Please see Figures 6-8 As shown, in this embodiment, the inner support portion 137 includes a slide rod 1370 slidably connected to the outer through groove 1360, a pair of telescopic rods 1371 snapped and fixed to the outer wall of the slide rod 1370, a spring 1372 sleeved on the outside of the telescopic rods 1371, and an inner support plate 1373 slidably connected to the outer through groove 1360. The inner support plate 1373 is snapped and fixed to the ends of the two telescopic rods 1371.

[0062] Furthermore, after the inner support plate 1373 comes into contact with the inner wall of the housing 111, and the slide rod 1370 continues to move outward, the spring 1372 is compressed and increases its own elastic potential energy. The elastic force of the spring 1372 acts on the inner support plate 1373. This setting is used to limit the fixed position of the mounting plate 136 in the housing 111, and ensure that the end of the speed sensor 121 is close to the shaft end gear inside the axle box.

[0063] This invention also provides a method for detecting the speed of a Fuxing high-speed train using an intelligent speed sensor. The method, using the aforementioned Fuxing high-speed train intelligent speed sensor detection device, includes the following steps:

[0064] Before the S1 Fuxing bullet train is put into operation, several detection mechanisms 100 are installed on several axle boxes at its bottom. The motor 131 is started to drive the lead screw 132 to rotate. When the slider 133 and the pressure plate 134 move forward, the tilt angle of the connecting rod 135 changes, which causes the inner support part 137 to move outward inside the outer through groove 1360 of the mounting plate 136.

[0065] S2. After the inner support plate 1373 comes into contact with the inner wall of the box 111, the slide rod 1370 continues to move outward, and the spring 1372 is compressed and increases its own elastic potential energy. The elastic force of the spring 1372 acts on the inner support plate 1373, thereby limiting the fixed position of the mounting plate 136 in the box 111, and ensuring that the end of the speed sensor 121 is close to the shaft end gear inside the axle box.

[0066] S3. During operation, the axle-end gears of the subsequent Fuxing bullet train rotate at high speed. The magnetic element inside the Hall-effect speed sensor 121 periodically approaches and moves away from the tooth tip and tooth groove of the axle-end gear, disturbing the magnetic field and generating a pulse electrical signal whose frequency is strictly proportional to the rotational speed. This signal is transmitted to the signal processing unit inside the bullet train via the control box 123. The signal is filtered, shaped and digitized. By accurately calculating the pulse frequency and combining it with the number of teeth of the gear and the wheel circumference, the real-time speed of the Fuxing bullet train is calculated.

[0067] S4. During the operation of the Fuxing bullet train, the signal processing unit detects the signal transmitted by the speed sensor 121 in real time. The system's self-diagnosis algorithm continuously evaluates the pulse electrical signal. When it detects that the pulse signal jitter has increased or the pulse signal is lost or exceeds the tolerance, it sends a retraction command to the control box 123.

[0068] S5. When the motor 131 drives the lead screw 132 to rotate in the opposite direction, and the slider 133 and the pressure plate 134 move backward, the structure of the inner support part 137 is reset first, and then the mounting plate 136 is pulled to retract into the interior of the box 111 along with the speed sensor 121. At this time, the lower protrusion 1361 at the bottom of the mounting plate 136 moves along the bending groove 1130, which drives the two baffles 113 to move towards each other, thereby closing the opening at the front end of the box 111.

[0069] S6. Next, after the mounting plate 136 contacts the contact position sensor 122, it feeds back the current status of the speed sensor 121 to the control box 123 to ensure that the action is executed in place. The signal processing unit reports the information of the target detection mechanism 100 to the train operator based on the warning status and fault status.

[0070] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A speed intelligent sensor detection device for Fuxing bullet trains, comprising a detection mechanism installed inside the axle box at the bottom of the bullet train, wherein a speed measuring module is provided inside, the speed measuring module comprising a speed sensor, a contact position sensor, and a control box; characterized in that: The speed measuring module is located inside the detection box, and the detection box is equipped with a recycling mechanism. The detection box includes a box body with an opening at the front end and two symmetrically distributed baffles. A bending groove is provided on the bottom horizontal plate of the baffle. The recycling mechanism includes a motor, a lead screw driven by the motor, a slider sleeved on the outside of the lead screw, a pressure plate disposed at the bottom of the slider, and a mounting plate that moves with the pressure plate to fix the speed sensor. The mounting plate has a pair of inner supports inside, and two protruding rods are provided on the bottom surface of the mounting plate. After the motor starts, it drives the lead screw to rotate, which in turn moves the slider and the pressure plate. After the pressure plate moves forward, it drives a pair of inner supports to extend outward, thus fixing the mounting plate inside the box. After the pressure plate moves backward, the mounting plate drives the speed sensor to retract into the box and drives the lower protrusion to move along the bending groove, causing the two baffles to seal the front opening of the box.

2. The intelligent speed sensor detection device for Fuxing bullet trains according to claim 1, characterized in that: The front end of the box body is provided with a sliding groove with an L-shaped longitudinal cross section, and the bottom surface of the box body is provided with two limiting grooves that are connected to the sliding groove. The baffle has an L-shaped longitudinal cross section and slides inside the sliding groove.

3. The intelligent speed sensor detection device for Fuxing bullet trains according to claim 2, characterized in that: The testing box also includes a partition integrally formed on the inner wall of the box, a cover plate disposed at the rear end of the box, and a pair of lifting lugs disposed on the outer walls of the left and right ends of the box near the bottom.

4. The intelligent speed sensor detection device for Fuxing bullet trains according to claim 3, characterized in that: The top surface of the partition has a through groove running vertically through it. The cover plate is fixedly connected to the rear side wall of the box by screws, and the lifting lug is welded to the box.

5. The intelligent speed sensor detection device for Fuxing bullet trains according to claim 4, characterized in that: The probe of the speed sensor has a threaded groove on its outer side, and a nut for fixing the speed sensor is provided on the outer side of the threaded groove. The contact position sensor and the control box are both fixedly connected to the box body by screws.

6. The intelligent speed sensor detection device for Fuxing bullet trains according to claim 5, characterized in that: The motor is fixedly connected to the top surface of the partition by screws. One end of the lead screw is coaxially connected to the motor, and the other end is rotatably connected to the inner wall of the box. The slider is slidably connected to the inside of the through groove on the plate, and the slider is threadedly connected to the lead screw.

7. The intelligent speed sensor detection device for Fuxing bullet trains according to claim 6, characterized in that: The pressure plate is snapped and fixed to the bottom surface of the slider. The pressure plate has a through-hole that runs from front to back. The diameter of the hole is larger than that of the speed sensor probe. The mounting plate is slidably connected to the inside of the box. The two ends of the mounting plate have external through grooves with an L-shaped cross section. The bottom end of the lower protrusion passes through the limiting groove and extends into the inside of the bending groove.

8. The intelligent speed sensor detection device for Fuxing bullet trains according to claim 7, characterized in that: The inner support includes a slide rod slidably connected to the outer through groove, a pair of telescopic rods snapped and fixed to the outer wall of the slide rod, a spring sleeved on the outside of the telescopic rod, and an inner support plate slidably connected to the outer through groove. The inner support plate is snapped and fixed to the ends of the two telescopic rods.

9. The intelligent speed sensor detection device for the Fuxing bullet train according to claim 8, characterized in that: The recycling mechanism also includes a connecting rod that is rotatably connected between the outer wall protrusion of the pressure plate and the outer wall protrusion of the slide bar.

10. A method for detecting the speed of a Fuxing bullet train using an intelligent speed sensor, comprising the Fuxing bullet train intelligent speed sensor detection device as described in claim 9, characterized in that... Includes the following steps: Before the S1 and Fuxing bullet trains are put into operation, several testing mechanisms are installed in several axle boxes at the bottom of the train. The motor is started to drive the lead screw to rotate, which drives the slider and pressure plate to move forward. The tilt angle of the connecting rod changes, which in turn drives the inner support to move outward inside the outer through groove of the mounting plate. S2. After the inner support plate comes into contact with the inner wall of the box, the slide rod continues to move outward, and the spring is compressed and increases its own elastic potential energy. The spring force acts on the inner support plate, thereby limiting the fixed position of the mounting plate in the box and ensuring that the end of the speed sensor is close to the shaft end gear inside the axle box. S3. During operation, the high-speed gears at the axle end of the Fuxing bullet train rotate at high speed. The magnetic element inside the Hall effect speed sensor periodically approaches and moves away from the tooth tip and tooth groove of the axle end gear, disturbing the magnetic field and generating a pulse electrical signal whose frequency is strictly proportional to the rotational speed. This signal is transmitted through the control box to the signal processing unit inside the bullet train, where the signal is filtered, shaped, and digitized. By accurately calculating the pulse frequency and combining it with the number of teeth of the gear and the circumference of the wheel, the real-time speed of the Fuxing bullet train is calculated. S4. During the operation of the Fuxing bullet train, the signal processing unit detects the signal transmitted by the speed sensor in real time. The system's self-diagnosis algorithm continuously evaluates the pulse electrical signal. When it detects that the pulse signal jitter has increased or that the pulse signal is lost or exceeds the tolerance, it sends a retraction command to the control box. S5. When the motor drives the lead screw to rotate in the opposite direction and the slider and pressure plate move backward, it first drives the structure of the inner support to reset, and then pulls the mounting plate with the speed sensor to retract into the interior of the box. At this time, the lower protrusion at the bottom of the mounting plate moves along the bending groove, which drives the two baffles to move towards each other, thereby closing the opening at the front end of the box. S6. Next, after the mounting plate comes into contact with the contact position sensor, it feeds back the current status of the mounting plate to the control box to ensure that the action is performed in place. The signal processing unit reports the information of the target detection mechanism to the train operator based on the warning status and fault status.

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