Fire-fighting inspection system

Abstract

The utility model discloses a fire-fighting inspection system, and relates to the technical field of detection equipment, the fire-fighting inspection system comprises a track and an inspection device, the track is laid on the top wall of an area to be inspected; the inspection device comprises a walking frame, a driving mechanism and a detection mechanism, the driving mechanism is installed on the walking frame and used for driving the walking frame to move in the extending direction of the track, the detection mechanism comprises a rotary driving assembly and an adjusting arm, the connecting end of the adjusting arm is connected with the rotary driving assembly, and the free end is provided with a detection module; the rotation driving assembly is installed on the walking frame and used for driving the adjusting arm to rotate relative to the walking frame so as to drive the detection module to swing relative to the walking frame and detect fire information in the air of the to-be-inspected area. According to the utility model, the driving mechanism drives the walking frame to move along the track, thereby ensuring that the inspection device can detect fire information in time when a fire occurs in any area, and ensuring that the fire can be found and blocked in time when the fire occurs in the bud, so that the detection is in time.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a fire inspection system. Background Art

[0002] The work site needs to be equipped with corresponding firefighting equipment to ensure fire prevention and fire safety. When a fire occurs at the work site, the firefighting equipment can sense it immediately and take fire-fighting actions, while transmitting fire warnings or signals to firefighting operators. The work site will be equipped with corresponding fire detection equipment, the most commonly used of which is the fire inspection system.

[0003] The fire inspection system can collect signals from the environment to collect fire information. If a fire hazard is found in the environment, fire extinguishing action will be taken immediately, or a fire information alarm will be issued.

[0004] The fire inspection systems currently used in the market are usually installed on the top of the work site, and a certain structure is used to drive the fire inspection system to detect the environment. However, this type of fire inspection system can only achieve simple movement and can only detect the area corresponding to its location. When fire information appears in other areas, or when fire information appears in the detection blind spot of the fire inspection system, the fire inspection system cannot detect the fire information in time, and can often only be discovered after the fire has occurred and expanded. At the same time, when the existing fire inspection systems are used, they often adopt a fixed detection module. In this way, if the fire signal is not obvious enough, the fire inspection system will not be able to detect the fire environment in a timely and flexible manner, and there will be problems of untimely detection and inaccurate detection results, which may cause fire hazards to not be discovered in time or misjudgment. Utility Model Content

[0005] The main purpose of the utility model is to provide a fire inspection system, aiming to solve the problems of untimely detection and inaccurate detection results in the fire inspection system in the prior art.

[0006] To achieve the above purpose, the utility model proposes a fire inspection system, comprising:

[0007] A track, wherein the track is laid on the top wall of the area to be inspected;

[0008] The inspection device comprises a traveling frame, a driving mechanism and a detecting mechanism, wherein the driving mechanism is mounted on the traveling frame and is used to drive the traveling frame to move along the extension direction of the track, and the detecting mechanism comprises a rotating driving assembly and an adjusting arm, wherein the two ends of the adjusting arm are respectively a connecting end and a free end, wherein the connecting end is connected to the rotating driving assembly, and the free end is provided with a detecting module, and the rotating driving assembly is mounted on the traveling frame and is used to drive the adjusting arm to rotate relative to the traveling frame, so as to drive the detecting module to swing relative to the traveling frame and detect the fire information in the air of the area to be inspected.

[0009] In one embodiment, the rotary drive assembly includes a first rotary drive member and a first worm, and a first worm wheel cooperating with the first worm is provided on the connecting end. The first rotary drive member drives the first worm to rotate, so as to drive the adjusting arm to swing through the first worm wheel.

[0010] In one embodiment, the traveling frame is formed with a receiving groove with a notch facing downward, the receiving groove is used to accommodate the adjusting arm, the first rotary driving member is installed on the top of the traveling frame, and the first worm passes through the traveling frame and extends into the receiving groove.

[0011] In one embodiment, the detection module includes at least one of a smoke sensor, an image sensor, a thermal imaging sensor, and a gas sensor.

[0012] In one embodiment, the driving mechanism includes a second rotating driving member and a second worm, a first gear is rotatably provided on the top of the traveling frame, a first rack meshing with the first gear is provided at the bottom of the track, an extension direction of the first rack is the same as an extension direction of the track, a second worm wheel for cooperating with the second worm is provided on the first gear, the second rotating driving member drives the second worm to rotate, and drives the first gear to rotate through the second worm wheel, so that the traveling frame moves along the track through the cooperation of the first gear and the first rack.

[0013] In one embodiment, the inspection device further includes a spoiler mechanism, which is installed on the walking frame and is used to disturb the surrounding air.

[0014] In one embodiment, a second rack is provided at the bottom of the track, and the extension direction is the same as the extension direction of the track. The spoiler mechanism includes a second gear, a connecting shaft and a fan blade. The second gear is rotatably provided on the top of the traveling frame and meshes with the second rack. The fan blade is connected to the axis of the second gear through the connecting shaft. The second rack is used to drive the second gear to rotate when the traveling frame moves along the track, and drive the fan blade to rotate to disturb the air.

[0015] In one embodiment, a contact switch is provided at the bottom of each of the two end portions of the track along its extension direction, and two first contact blocks are provided at each of the two ends of the traveling frame along its moving direction, and the first contact blocks are used to abut against the contact switches provided on the same side thereof.

[0016] In one embodiment, the walking frame includes a frame body and a walking arm, the length direction of the frame body is the same as the extension direction of the track, and multiple walking arms are arranged on both sides of the width direction of the frame body, and the multiple walking arms are arranged at intervals along the length direction of the frame body. The track includes a vertical web and a horizontal bottom plate connected to the web, the bottom of each walking arm is connected to the frame body, and the top of each walking arm is provided with a roller supported on the top of the horizontal bottom plate and in rolling contact with the horizontal bottom plate.

[0017] In one embodiment, at least one of the walking arms is provided with a second contact block on a side facing the frame, and the horizontal base plate is bent upward on a side away from the vertical web to form a detection plate, and a plurality of position sensors for sensing the second contact block are provided on the detection plate, and the plurality of position sensors are spaced apart along the extension direction of the track, and all the position sensors are arranged at the same height as all the second contact blocks.

[0018] The technical solution of the utility model is to set a track on the top wall of the area to be inspected, and then drive the walking frame to move along the track through the driving mechanism to realize uninterrupted mobile inspection in the area to be inspected, thereby ensuring that the inspection device can detect the fire information in time when a fire occurs at any position in the area to be inspected, and ensure that the fire hazard can be discovered and blocked in time when it occurs in the bud, so that the detection is timely; at the same time, the detection module can move together with the swing of the adjustment arm, and the swinging adjustment arm can make the detection module closer to the occurrence position of the fire information, thereby improving the detection accuracy of the detection module for the fire information, thereby improving the accuracy of the detection result, so that the fire hazard can be discovered in time and no misjudgment will occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A structural schematic diagram of an embodiment of a fire inspection system provided by the utility model;

[0021] Figure 2 A schematic diagram of the structure of an inspection device of an embodiment of a fire inspection system provided by the utility model;

[0022] Figure 3 A schematic diagram of the structure of the first gear and the second worm gear of an embodiment of the fire inspection system provided by the utility model;

[0023] Figure 4 A schematic diagram of the structure of a spoiler mechanism of an embodiment of a fire inspection system provided by the utility model;

[0024] Figure 5 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0025] Figure 6 for Figure 1 Schematic diagram of the enlarged structure of part B.

[0026] Description of Figure Numbers:

[0027] 100. Fire inspection system; 1. Track; 11. First rack; 12. Second rack; 13. Contact switch; 14. Position sensor;

[0028] 2. Inspection device; 21. Traveling frame; 211. First gear; 212. Second worm gear; 213. First contact block; 214. Frame; 215. Traveling arm; 216. Roller; 217. Second contact block; 218. Ventilation groove; 22. Driving mechanism; 221. Second rotating driving member; 222. Second worm; 23. Detection mechanism; 231. Rotation driving assembly; 2311. First rotating driving member; 2312. First worm; 232. Adjustment arm; 2321. Connecting end; 2322. Free end; 2323. Detection module; 2324. First worm gear; 24. Accommodating groove; 25. Disturbing mechanism; 251. Second gear; 252. Fan blade.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The fire inspection systems currently used in the market are usually installed on the top of the work site, and a certain structure is used to drive the fire inspection system to detect the environment. However, this type of fire inspection system can only achieve simple movement and can only detect the area corresponding to its location. When fire information appears in other areas, or when fire information appears in the detection blind spot of the fire inspection system, the fire inspection system cannot detect the fire information in time, and can often only be discovered after the fire has occurred and expanded. At the same time, when the existing fire inspection systems are used, they often adopt a fixed detection module. In this way, if the fire signal is not obvious enough, the fire inspection system will not be able to detect the fire environment in a timely and flexible manner, and there will be problems of untimely detection and inaccurate detection results, which may cause fire hazards to not be discovered in time or misjudgment.

[0034] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 5 The utility model proposes a fire inspection system 100, including a track 1 and an inspection device 2, the track 1 is laid on the top wall of the area to be inspected; the inspection device 2 includes a traveling frame 21, a driving mechanism 22 and a detection mechanism 23, the driving mechanism 22 is installed on the traveling frame 21 and is used to drive the traveling frame 21 to move along the extension direction of the track 1, the detection mechanism 23 includes a rotation driving component 231 and an adjusting arm 232, the two ends of the adjusting arm 232 are respectively a connecting end 2321 and a free end 2322, wherein the connecting end 2321 is connected to the rotation driving component 231, and the free end 2322 is provided with a detection module 2323, the rotation driving component 231 is installed on the traveling frame 21 and is used to drive the adjusting arm 232 to rotate relative to the traveling frame 21, so as to drive the detection module 2323 to swing relative to the traveling frame 21 and detect the fire information in the air of the area to be inspected.

[0035] The technical solution of the utility model is to set a track 1 on the top wall of the area to be inspected, and then drive the walking frame 21 to move along the track 1 through the driving mechanism 22 to realize uninterrupted mobile inspection in the area to be inspected, thereby ensuring that the inspection device 2 can detect fire information in time when a fire occurs in any area, ensuring that it can be discovered and blocked in time when it occurs in the bud, so that the detection is timely; at the same time, the detection module 2323 can move together with the swing of the adjustment arm 232, and the swinging adjustment arm 232 can make the detection module 2323 closer to the occurrence location of the fire information, thereby improving the detection accuracy of the detection module 2323 for the fire information, thereby improving the accuracy of the detection result.

[0036] It should be noted that the fire inspection system 100 also includes a processor, which is electrically connected to the detection module 2323 and analyzes the fire information detected by the detection module 2323 to determine whether a fire may occur. It can also be used to issue an alarm message after determining that a fire may occur. The processor adopts a processor in the prior art, and the communication method between the processor and the detection module 2323 can also adopt a communication method in the prior art.

[0037] In one embodiment, the rotation drive assembly 231 includes a first rotation drive member 2311 and a first worm 2312. A first worm wheel 2324 that cooperates with the first worm 2312 is provided on the connecting end 2321. The first rotation drive member 2311 drives the first worm 2312 to rotate, so as to drive the adjusting arm 232 to swing through the first worm wheel 2324.

[0038] It can be understood that the first rotating drive member 2311 can be hydraulically driven, pneumatically driven, worm gear driven or electrically driven to realize the rotational drive function. Through the cooperation of the first worm gear 2324 and the first worm 2312, the connecting end 2321 of the adjusting arm 232 is fixed, and the free end 2322 swings relative to the connecting frame to realize the adjustment of the position of the detection module 2323, so that the detection module 2323 is closer to the occurrence location of the fire information, thereby improving the detection accuracy of the detection module 2323 for the fire information.

[0039] See also Figure 2 Furthermore, the traveling frame 21 is formed with a receiving groove 24 with a notch facing downwards, and the receiving groove 24 is used to receive the adjusting arm 232. The first rotating driving member 2311 is installed on the top of the traveling frame 21, and the first worm 2312 passes through the traveling frame 21 and extends into the receiving groove 24. Under normal conditions, the adjusting arm 232 is received in the receiving groove 24, which can prevent the adjusting arm 232 from interfering with other equipment in the inspection area and causing damage. Secondly, the traveling frame 21 can also protect the receiving groove 24 to prevent other objects from impacting the adjusting arm 232 and causing damage to the adjusting arm 232.

[0040] Specifically, the detection module 2323 includes at least one of a smoke sensor, an image sensor, a thermal imaging sensor, and a gas sensor. By setting various types of sensors, the detection module 2323 can clearly and accurately detect fire information for fires in different scenarios, thereby improving the applicability of the detection module 2323.

[0041] Please combine Figure 1 and Figure 6In one embodiment, the driving mechanism 22 includes a second rotating driving member 221 and a second worm 222. A first gear 211 is rotatably provided on the top of the traveling frame 21. A first rack 11 meshing with the first gear 211 is provided at the bottom of the track 1. The extension direction of the first rack 11 is the same as the extension direction of the track 1. A second worm wheel 212 for cooperating with the second worm 222 is provided on the first gear 211. The second rotating driving member 221 drives the second worm 222 to rotate, and drives the first gear 211 to rotate through the second worm wheel 212, so that the traveling frame 21 moves along the track 1 through the cooperation between the first gear 211 and the first rack 11. When in use, the second rotating driving member 221 drives the second worm 222 to rotate, and the second worm 222 drives the second worm wheel 212 to rotate. Since the second worm wheel 212 is fixed to the first gear 211, when the second worm wheel 212 rotates, the first gear 211 rotates therewith, and then through the meshing relationship between the first rack 11 and the first gear 211, the entire walking frame 21 is driven to move along the track 1. The movement is carried out by the cooperation of the first gear 211 and the first rack 11, and precise position control can be achieved. At the same time, the gear transmission system is usually highly efficient and can effectively convert the energy output by the second rotating driving member 221 into mechanical motion, thereby reducing energy waste and improving the energy utilization rate of the system.

[0042] Please combine Figure 1 and Figure 4 In one embodiment, the inspection device 2 further includes a spoiler mechanism 25, which is mounted on the traveling frame 21 and is used to disturb the surrounding air. The spoiler mechanism 25 can disturb the airflow outside the through slot, so that more air passes through the detection module 2323 when the traveling frame 21 moves, thereby improving the detection accuracy and detection efficiency of the detection module 2323 for the air in the area to be inspected.

[0043] Furthermore, a second rack 12 is provided at the bottom of the track 1, and the extension direction is the same as that of the track 1. The spoiler mechanism 25 includes a second gear 251, a connecting shaft and a fan blade 252. The second gear 251 is rotatably provided on the top of the traveling frame 21 and meshes with the second rack 12. The fan blade 252 is connected to the axis of the second gear 251 through the connecting shaft. The second rack 12 is used to drive the second gear 251 to rotate when the traveling frame 21 moves along the track 1, and drive the fan blade 252 to rotate to disturb the air.

[0044] When the driving mechanism 22 drives the traveling frame 21 to move along the track 1, the meshing relationship between the second gear 251 and the second rack 12 causes the second gear 251 to rotate when the traveling frame 21 moves, thereby driving the fan blades 252 to rotate through the connecting shaft to achieve the effect of disturbing the air.

[0045] It should be noted that the first rack 11 and the second rack 12 can be shared, that is, the first rack 11 and the second rack 12 can be the same rack, thereby simplifying the overall structure of the track 1 and the inspection device 2 and reducing their volume. The fan blade 252 is rotated by the cooperation of the second gear 251 and the second rack 12, without the need for additional power parts, thereby simplifying the structure and saving costs.

[0046] See also Figure 2 Specifically, a plurality of ventilation grooves 218 are provided at intervals at the position of the walking frame 21 corresponding to the spoiler mechanism 25, and the fan blades 252 stir the gas in the surrounding environment, and the gas flows to the detection module 2323 through the ventilation grooves 218. The smoke sensor on the detection module 2323 can detect dust and smoke in the air, the image sensor can collect environmental information, the thermal imaging sensor can detect the thermal distribution in the environment, and the gas sensor can detect various gas parameters in the environment, thereby improving the detection accuracy of fire information.

[0047] Please combine Figure 1 and Figure 2 In one embodiment, a contact switch 13 is provided at the bottom of each of the two ends of the track 1 along its extension direction, and two first contact blocks 213 are provided at each of the two ends of the traveling frame 21 along its moving direction. The first contact block 213 is used to abut against the contact switch 13 provided on the same side thereof.

[0048] Both contact switches 13 are connected to the processor, so that when the traveling frame 21 reaches the end of the track 1 and the first contact block 213 thereon abuts against the contact switch 13 arranged on the same side thereof, information is sent to the processor to confirm the current position of the traveling frame 21.

[0049] Please combine Figure 1 and Figure 2 In one embodiment, the walking frame 21 includes a frame body 214 and a walking arm 215. The length direction of the frame body 214 is the same as the extension direction of the track 1. Multiple walking arms 215 are arranged on both sides of the width direction of the frame body 214. The multiple walking arms 215 are arranged at intervals along the length direction of the frame body 214. The track 1 includes a vertical web and a horizontal bottom plate vertically connected to the web. The bottom of each walking arm 215 is connected to the frame body 214, and the top of each walking arm 215 is provided with a roller 216 supported on the top of the horizontal bottom plate and in rolling contact with the horizontal bottom plate.

[0050] The two walking arms 215 located on both sides of the width direction of the frame 214 form a group of walking arms 215. The frame 214 is provided with multiple groups of walking arms 215 at intervals along its length direction. The two walking arms 215 in each group of walking arms 215 are arranged correspondingly. Rollers 216 are arranged on the top walls of the walking arms 215, and the bottom is connected to the frame 214, so that the frame 214 is hoisted on the track 1, and the frame 214 is arranged downward, which is convenient for the detection module 2323 to detect downward, reduce the distance between the detection module 2323 and the flammable material, and improve the detection accuracy.

[0051] Furthermore, at least one walking arm 215 is provided with a second contact block 217 on one side facing the frame body 214, and the horizontal bottom plate is bent upward on one side away from the vertical web to form a detection plate, and a plurality of position sensors 14 for sensing the second contact block 217 are provided on the detection plate. The plurality of position sensors 14 are distributed at intervals along the extension direction of the track 1, and each position sensor 14 is arranged at the same height as each second contact block 217.

[0052] A second contact block 217 is set on the inner side of the walking arm 215, and a plurality of position sensors 14 are set at intervals on the outer side of the track 1. Each position sensor 14 is electrically connected to the processor. When the second contact block 217 passes through each position sensor 14, the position sensor 14 sends the corresponding position information to the processor, so that when a fire risk occurs in the environment, the processor can immediately identify and report the position sensor 14 closest to the patrol device 2 when the fire information is detected, thereby identifying the specific location of the fire information and achieving the purpose of precise fire fighting.

[0053] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fire inspection system, characterized in that: include: A track, wherein the track is laid on the top wall of the area to be inspected; An inspection device, the inspection device comprises a traveling frame, a driving mechanism and a detection mechanism, the driving mechanism is mounted on the traveling frame and is used to drive the traveling frame to move along the extension direction of the track, the detection mechanism comprises a rotation driving assembly and an adjustment arm, the two ends of the adjustment arm are respectively a connecting end and a free end, wherein the connecting end is connected to the rotation driving assembly, the free end is provided with a detection module, the rotation driving assembly is mounted on the traveling frame and is used to drive the adjustment arm to rotate relative to the traveling frame, so as to drive the detection module to swing relative to the traveling frame and detect the fire information in the air of the area to be inspected; The rotary drive assembly includes a first rotary drive member and a first worm, a first worm wheel matched with the first worm is arranged on the connecting end, and the first rotary drive member drives the first worm to rotate, so as to drive the adjusting arm to swing through the first worm wheel.

2. The fire inspection system according to claim 1, characterized in that: The traveling frame is formed with a receiving groove with a notch facing downwards, and the receiving groove is used to accommodate the adjusting arm. The first rotary driving member is installed on the top of the traveling frame, and the first worm passes through the traveling frame and extends into the receiving groove.

3. The fire inspection system according to claim 1, characterized in that: The detection module includes at least one of a smoke sensor, an image sensor, a thermal imaging sensor and a gas sensor.

4. The fire inspection system according to any one of claims 1 to 3, characterized in that: The driving mechanism includes a second rotating driving member and a second worm gear. A first gear is rotatably provided on the top of the traveling frame. A first rack meshing with the first gear gear is provided at the bottom of the track. The extension direction of the first rack gear is the same as the extension direction of the track. A second worm wheel for cooperating with the second worm gear is provided on the first gear. The second rotating driving member drives the second worm gear to rotate, and drives the first gear to rotate through the second worm wheel, so that the traveling frame moves along the track through the cooperation between the first gear gear and the first rack gear.

5. The fire inspection system according to any one of claims 1 to 3, characterized in that: The inspection device also includes a spoiler mechanism, which is installed on the walking frame and is used to disturb the air.

6. The fire inspection system according to claim 5, characterized in that: A second rack is provided at the bottom of the track, and its extension direction is the same as that of the track. The spoiler mechanism includes a second gear, a connecting shaft and a fan blade. The second gear is rotatably provided on the top of the traveling frame and meshes with the second rack. The fan blade is connected to the axis of the second gear through the connecting shaft. The second rack is used to drive the second gear to rotate when the traveling frame moves along the track, and drive the fan blade to rotate to disturb the air.

7. The fire inspection system according to any one of claims 1 to 3, characterized in that: A contact switch is respectively arranged at the bottom of both ends of the track along its extension direction, and two first contact blocks are respectively arranged at both ends of the traveling frame along its moving direction. The first contact blocks are used to abut against the contact switches arranged at the same ends thereof.

8. The fire inspection system according to any one of claims 1 to 3, characterized in that: The walking frame includes a frame body and a walking arm. The length direction of the frame body is the same as the extension direction of the track. A plurality of walking arms are arranged on both sides of the width direction of the frame body. The plurality of walking arms are arranged at intervals along the length direction of the frame body. The track includes a vertical web and a horizontal bottom plate connected to the web. The bottom of each walking arm is connected to the frame body, and the top of each walking arm is provided with a roller supported on the top of the horizontal bottom plate and in rolling contact with the horizontal bottom plate.

9. The fire inspection system according to claim 8, characterized in that: A second contact block is provided on a side of at least one of the walking arms facing the frame body, and the horizontal base plate is bent upward on a side away from the vertical web to form a detection plate, and a plurality of position sensors for sensing the second contact block are provided on the detection plate, and the plurality of position sensors are spaced apart along the extension direction of the track, and all the position sensors are arranged at the same height as all the second contact blocks.

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