Special railway trolley and special railway trolley protection system

Abstract

The invention relates to a special railway trolley and a special railway trolley protection system, relates to the technical field of railway operation equipment, and aims to solve the problem that trundles of the special railway trolley are easy to damage. The special trolley for the railway comprises a trolley body; the trundles are rotationally arranged at the bottom of the vehicle body; the driving mechanism is arranged on the vehicle body and connected with the trundles, and the driving mechanism is used for driving the trundles to rotate; the telescopic supporting mechanism is arranged on the vehicle body and used for lifting and supporting the vehicle body; the telescopic supporting mechanism is used for achieving overall lifting of the vehicle body, so that the trundles are suspended and separated from the ground. Therefore, the vehicle body is supported by the telescopic supporting mechanism. Moreover, under the action of the gravity of the special trolley for the railway, the telescopic supporting mechanism is pressed on the ground, so that the special trolley for the railway is supported and fixed. Therefore, when the special trolley for the railway needs to stop for unloading, the trolley body and the trundles can be lifted. Therefore, the trundles are not pressed.

Description

Technical Field

[0001] The invention relates to the technical field of railway operating equipment, and in particular to a special railway trolley and a special railway trolley protection system. Background Art

[0002] During the construction of railway operating lines, maintenance personnel often rely on simple flatbed trolleys as railway special trolleys to transport materials or machinery. Due to the heavy weight of materials or machinery, the casters of the simple flatbed trolley bear the weight of the vehicle body and the materials or machinery (cargo) on it for a long time. This makes the casters easily damaged and unable to roll, shortening the service life of the casters. At the same time, it also increases the maintenance and maintenance costs of the simple flatbed trolley.

[0003] That is to say, the casters of the railway special trolley in the prior art have the problem of being easily damaged. Summary of the invention

[0004] The invention provides a railway special trolley and a railway special trolley protection system, which are used to solve the problem that the casters of the railway special trolley are easily damaged.

[0005] The present invention provides a railway special trolley, which comprises:

[0006] the body of the vehicle; and

[0007] Casters, which are rotatably disposed at the bottom of the vehicle body; and

[0008] A driving mechanism, which is disposed on the vehicle body and connected to the casters, and is used to drive the casters to rotate; and

[0009] A telescopic support mechanism is arranged on the vehicle body, and is used for lifting and supporting the vehicle body;

[0010] Among them, the railway special trolley is constructed so that the telescopic support mechanism inside it can be extended to raise the car body and make the casters suspended in the air, so as to realize the fixed support function of the telescopic support mechanism on the car body, and the telescopic support mechanism inside it can be shortened to lower the car body so that the casters can contact and roll with the ground.

[0011] In one embodiment, the drive mechanism comprises:

[0012] A servo motor, a fixed end of which is fixed to the vehicle body, and the servo motor is extended in a first direction; and

[0013] A first gear connected to a drive shaft of the servo motor; and

[0014] A second gear meshing with the first gear, wherein a central axis of the second gear is arranged at an angle of 90 degrees to a central axis of the first gear;

[0015] A driving rod, on the outer periphery of which a second gear is arranged, and casters are arranged at both ends of the driving rod;

[0016] The rotation torque of the servo motor can be transmitted to the caster through the first gear, the second gear and the driving rod, so that the caster can roll on the ground.

[0017] In one embodiment, the first gear and the second gear are bevel gears.

[0018] In one embodiment, the telescopic support mechanism comprises:

[0019] A first telescopic assembly, one end of which is fixed to the bottom of the vehicle body; and

[0020] A second telescopic assembly, one end of which is fixed to the bottom of the vehicle body, and the second telescopic assembly is spaced apart from the first telescopic assembly in the second direction;

[0021] Among them, the other end of the first telescopic component is the telescopic end, and the other end of the second telescopic component is the telescopic end. The other end of the first telescopic component and the other end of the second telescopic component can be synchronously extended to contact the ground.

[0022] In one embodiment, the first telescopic assembly comprises:

[0023] A driving member, a fixed end of which is fixed to the bottom of the vehicle body; and

[0024] an assembly block connected to the driving end of the driving member; and

[0025] The fixing plate is provided with a card slot which is card-engaged with the assembly block.

[0026] In one embodiment, the driving member is an electric push rod or a driving cylinder or a jack.

[0027] In one embodiment, when the driving member is an electric push rod, a battery is provided on the vehicle body, and the battery is electrically connected to the electric push rod for supplying power to the electric push rod.

[0028] In one embodiment, the first telescopic assembly and the second telescopic assembly have the same structure.

[0029] In one embodiment, it also includes an operating handle, which is arranged on the vehicle body, and the operating handle is used for manually pushing the railway special vehicle to move.

[0030] In one embodiment, it includes:

[0031] Supporting parking signs, which are set at both ends of the work area; and

[0032] A backstage host body, which is electrically connected to the matching parking sign; and

[0033] The above-mentioned railway special trolley moves within the working area;

[0034] A handheld device is arranged on the railway trolley and is electrically connected to the background host body. The handheld device can collect the current position information of the railway trolley and send it to the background host body;

[0035] Among them, the railway special vehicle protection system is constructed so that when the background host body monitors that the current position of the railway special vehicle exceeds the area of ​​the operating area, the background host body can send a first alarm command to the handheld device, the handheld device receives the first alarm command and issues a voice alarm, and the background host body sends a second alarm command to the matching parking sign, the matching parking sign receives the second alarm command and displays the alarm on the screen.

[0036] Compared with the prior art, the advantage of the present invention is that a telescopic support mechanism is added to the railway special trolley, and the telescopic support mechanism is used to achieve the overall elevation of the car body, so that the casters are suspended and off the ground. Thereby, the telescopic support mechanism supports the car body. Moreover, under the action of the gravity of the railway special trolley itself, the telescopic support mechanism is pressed on the ground, thereby achieving the support and fixation of the railway special trolley. In this way, when the railway special trolley needs to stop to unload, the car body and casters can be raised. Thereby, the casters are not subjected to pressure. This avoids the problem in the prior art that the casters are always in a compressed state, resulting in a shortened service life. In this way, the service life of the casters is extended, thereby saving the maintenance and servicing costs of the railway special trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0038] Figure 1 Schematic diagram of the structure of a railway special trolley in an embodiment of the present invention;

[0039] Figure 2 yes Figure 1 A schematic diagram of the first and second telescopic components;

[0040] Figure 3 Schematic diagram of the structure of the railway special trolley protection system in an embodiment of the present invention;

[0041] Figure 4 yes Figure 3 Schematic diagram of the connection of the electrical module of the China Railway Special Trolley Protection System;

[0042] Figure 5 yes Figure 3 Schematic diagram of the internal structure of the middle and back-end host body.

[0043] Reference numerals:

[0044] 10. Car body; 20. Casters; 30. Driving mechanism; 31. Servo motor; 32. First gear; 33. Second gear; 34. Driving rod; 40. Telescopic support mechanism; 41. First telescopic assembly; 411. Driving member; 412. Assembly block; 413. Fixed plate; 4131. Card slot; 42. Second telescopic assembly; 50. Battery; 60. Operating handle; 100. Railway special trolley; 200. Matching parking sign; 201. Parking sign body; 202. Display screen; 300. Backstage host body; 301. Data storage module; 302. Wireless signal transceiver module; 303. Single chip microcomputer; 400. Handheld device. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] like Figure 1 As shown, the present invention provides a railway trolley 100, which includes a car body 10, a caster 20, a driving mechanism 30 and a telescopic support mechanism 40. The caster 20 is rotatably arranged at the bottom of the car body 10; the driving mechanism 30 is arranged on the car body 10 and connected to the caster 20, and the driving mechanism 30 is used to drive the caster 20 to rotate; the telescopic support mechanism 40 is arranged on the car body 10, and the telescopic support mechanism 40 is used to lift and support the car body 10. The railway trolley 100 is constructed so that the telescopic support mechanism 40 therein can be extended to raise the car body 10 and make the caster 20 suspended in the air, so as to realize the fixed support function of the telescopic support mechanism 40 on the car body 10, and the telescopic support mechanism 40 therein can be shortened to lower the car body 10, so that the caster 20 can contact with the ground and roll.

[0047] In the above arrangement, a telescopic support mechanism 40 is added to the railway trolley 100, and the telescopic support mechanism 40 is used to achieve the overall elevation of the car body 10, so that the caster 20 is suspended and off the ground. Thus, the telescopic support mechanism 40 supports the car body 10. Moreover, under the action of the gravity of the railway trolley 100 itself, the telescopic support mechanism 40 is pressed on the ground, thereby achieving the support and fixation of the railway trolley 100. In this way, when the railway trolley 100 needs to stop to unload, the car body 10 and the caster 20 can be raised. Thus, the caster 20 is not subjected to pressure. In addition, the problem of the caster 20 being always in a compressed state and shortening its service life in the prior art is avoided. In this way, the service life of the caster 20 is extended, thereby saving the maintenance and maintenance costs of the railway trolley 100.

[0048] In addition, the telescopic support mechanism 40 can adjust the height of the vehicle body 10 and the cargo thereon by its own telescopic function, so as to ensure that the cargo is adjusted to a suitable height, so as to facilitate the handling of the cargo by the handling personnel, thereby improving the handling efficiency of the cargo and also improving the convenience of its use.

[0049] Specifically, Figure 1 As shown, in one embodiment, the driving mechanism 30 includes a servo motor 31, a first gear 32, a second gear 33 and a driving rod 34. The servo motor 31 has a fixed end fixed on the vehicle body 10, and the servo motor 31 is extended in the first direction; the first gear 32 is connected to the driving shaft of the servo motor 31; the second gear 33 is meshed with the first gear 32, and the central axis of the second gear 33 is arranged at a 90-degree angle with the central axis of the first gear 32; the driving rod 34 has the second gear 33 arranged on its outer circumference, and casters 20 are arranged at both ends of the driving rod 34; through the first gear 32, the second gear 33 and the driving rod 34, the rotation torque of the servo motor 31 can be transmitted to the caster 20, so that the caster 20 can roll on the ground.

[0050] It should be noted that when the central axis of the second gear 33 is arranged at an angle of 90 degrees to the central axis of the first gear 32 , a certain angle deviation is allowed, for example, the angle deviation is plus or minus 0.5°.

[0051] Specifically, Figure 1 As shown, in one implementation, the first gear 32 and the second gear 33 are bevel gears.

[0052] Of course, according to actual conditions, the first gear 32 and the second gear 33 can be bevel gears.

[0053] It should be noted that bevel gears are also called bevel gears and bevel gears. They are used for transmission between intersecting shafts. Compared with cylindrical gears, they can change the transmission direction. The single-stage transmission ratio can be up to 6 and the maximum is 8.

[0054] Specifically, Figure 2 As shown, in one implementation, the telescopic support mechanism 40 includes a first telescopic assembly 41 and a second telescopic assembly 42. Among them, one end of the first telescopic assembly 41 is fixed to the bottom of the vehicle body 10; one end of the second telescopic assembly 42 is fixed to the bottom of the vehicle body 10, and the second telescopic assembly 42 is spaced apart from the first telescopic assembly 41 in the second direction; the other end of the first telescopic assembly 41 is a telescopic end, and the other end of the second telescopic assembly 42 is a telescopic end, and the other end of the first telescopic assembly 41 and the other end of the second telescopic assembly 42 can be synchronously extended to contact the ground.

[0055] In the above arrangement, the other end of the first telescopic assembly 41 and the other end of the second telescopic assembly 42 extend downward at the same time and contact the ground. In this way, the other end of the first telescopic assembly 41 and the other end of the second telescopic assembly 42 continue to extend downward, so that the vehicle body 10 can be lifted in the opposite direction. Thus, the lifting function of the vehicle body 10 is realized.

[0056] Specifically, Figure 2 As shown, in one implementation, the first telescopic assembly 41 includes a driving member 411, an assembly block 412 and a fixing plate 413. The driving member 411 has a fixed end fixed to the bottom of the vehicle body 10; the assembly block 412 is connected to the driving end of the driving member 411; and the fixing plate 413 is provided with a slot 4131, which is engaged with the assembly block 412.

[0057] It should be noted that the fixing plate 413 is a plate-mounted structure, which can increase its contact area with the ground, thereby improving the support performance of the first telescopic component 41. The fixing plate 413 can be a vacuum suction cup, which can give it a gripping function, thereby further improving the fixing performance of the first telescopic component 41.

[0058] Specifically, Figure 2 As shown, in one implementation, the driving member 411 is an electric push rod. Of course, a driving cylinder or a jack can be selected to be used as a substitute.

[0059] Specifically, Figure 1 As shown, in one implementation, a battery 50 is disposed on the vehicle body 10 , and the battery 50 is electrically connected to the electric push rod for supplying power to the electric push rod.

[0060] Specifically, the first telescopic assembly 41 and the second telescopic assembly 42 have the same structure, so that the first telescopic assembly 41 and the second telescopic assembly 42 can be interchanged, thereby improving the compatibility of the railway special trolley 100 and further improving the convenience of replacing parts.

[0061] Specifically, in one implementation, the number of the first telescopic components 41 is two in the third direction (perpendicular to Figure 1 The number of the second telescopic components 42 is two and they are spaced apart in the third direction. That is, the four telescopic components support and fix the vehicle body 10 together.

[0062] Specifically, Figure 1 As shown, in one implementation, the railway trolley 100 further includes an operating handle 60 , which is disposed on the vehicle body 10 , and the operating handle 60 is used to manually push the railway trolley 100 to move.

[0063] like Figure 3 and Figure 4As shown, the present invention also provides a railway special vehicle protection system, including a matching parking sign 200, a background host body 300, a railway special vehicle 100 and a handheld device 400. Among them, the supporting parking sign 200 is respectively arranged at both ends of the working area; the background host body 300 is electrically connected to the supporting parking sign 200; the railway special vehicle 100 moves in the working area; the handheld device 400 is arranged on the railway special vehicle 100 and is electrically connected to the background host body 300, the handheld device 400 can collect the current position information of the railway special vehicle 100 and send it to the background host body 300; the protection system of the railway special vehicle 100 is constructed so that when the background host body 300 monitors that the current position of the railway special vehicle 100 exceeds the area of ​​the working area, the background host body 300 can send a first alarm instruction to the handheld device 400, the handheld device 400 receives the first alarm instruction and issues a voice alarm, the background host body 300 sends a second alarm instruction to the supporting parking sign 200, the supporting parking sign 200 receives the second alarm instruction and displays an alarm on the screen.

[0064] In the above configuration, the background host body 300 has remote monitoring and alarm functions. When it is learned that the railway special vehicle 100 is not in the operating area, the background host body 300 can automatically send a first alarm command to the handheld device 400 and a second alarm command to the matching parking sign 200, thereby attracting the attention of the surrounding operators. In this way, the protection function of the railway special vehicle is realized.

[0065] Combine the following Figures 1 to 5 , describing a more complete embodiment:

[0066] The present invention provides a railway special trolley 100 and a protection system thereof, comprising a fixed plate 413, a driving rod 34, a car body 10 and a parking sign body 201, both sides of the bottom of the car body 10 are movably connected with the driving rod 34, four corners of the bottom of the car body 10 are equipped with electric telescopic rods, and the bottom of the electric telescopic rod is equipped with a fixed plate 413, a battery 50 is installed on the top of the car body 10, an operating handle 60 is welded on one side of the top of the car body 10, and a handheld device 400 is installed on one side of the top of the operating handle 60, a parking sign body 201 is installed on the outside of the car body 10, and a display screen 202 is installed on one side of the top of the parking sign body 201, a background host body 300 is installed on the outside of the car body 10, and a data storage module 301, a wireless signal transceiver module 302 and a single-chip computer 303 are installed in sequence inside the background host body 300, four fixed plates 413 are provided, and a non-slip rubber pad is provided at the bottom of the fixed plates 413;

[0067] When in use, by providing an anti-skid rubber pad at the bottom of the fixing plate 413, the anti-skid effect of the fixing plate 413 is improved, and the stability of the vehicle body 10 during braking is enhanced;

[0068] An assembly groove (slot 4131) is fixed at the middle position of the top of the fixing plate 413, and the inner wall of the assembly groove is provided with an internal thread, the driving end of the electric telescopic rod is fixed with an assembly block 412, and the outer wall of the assembly block 412 is provided with an external thread matching the internal thread;

[0069] When in use, the user can utilize the threaded connection between the assembly block 412 and the assembly groove to disassemble or assemble the fixing plate 413 at the bottom of the electric telescopic rod, thereby facilitating the user to maintain and replace the fixing plate 413;

[0070] Two driving rods 34 are provided, and a rotating structure is formed between the driving rods 34 and the vehicle body 10, and casters 20 are fixed to both ends of the driving rods 34;

[0071] The structure of the device is optimized, and the automatic operation of the vehicle body 10 is realized, thereby reducing human resources and enhancing the practicability of the device;

[0072] A second bevel gear (second gear 33) is welded at the middle position of the driving rod 34, a servo motor 31 is installed inside the vehicle body 10, and a first bevel gear (first gear 32) meshing with the second bevel gear is installed at the driving end of the servo motor 31;

[0073] When in use, the servo motor 31 is started to drive the first bevel gear to rotate, and then drive the second bevel gear meshing with the first bevel gear to rotate, thereby driving the driving rod 34 welded to the second bevel gear to rotate, and the driving rod 34 is used to drive the caster 20 to rotate automatically, thereby realizing the automatic movement of the vehicle body 10;

[0074] Both ends of the handheld device 400 are provided with screws connected to the operating handle 60, and a disassembly and installation structure is formed between the handheld device 400 and the operating handle 60;

[0075] When in use, on the one hand, by installing the handheld device 400 on the vehicle body 10, using the electronic modules such as GPS positioning and network communication inside the handheld device 400, the running position of the vehicle body 10 can be sent to the background host body 300, so that the device optimizes the performance of the mobile terminal, and the alarm information sent by the background host body 300 can be received, thereby enhancing the practicality of the device. On the other hand, screws connected to the operating handle 60 are provided at both ends of the handheld device 400, so that the handheld device 400 can be easily disassembled and maintained;

[0076] The handheld device 400 is in bidirectional electrical connection with the single-chip microcomputer 303, the wireless signal transceiver module 302 is in bidirectional electrical connection with the single-chip microcomputer 303 through a wire, and the output end of the single-chip microcomputer 303 is electrically connected to the servo motor 31, the display screen 202, the data storage module 301 and the input end of the electric telescopic rod through wires (see Figure 4 and Figure 5 ).

[0077] The model of the electric telescopic rod may be KM01, the model of the data storage module 301 may be CFM100, the model of the display screen 202 may be P10, the model of the servo motor 31 may be SGDM-04ADA, the model of the single-chip computer 303 may be dsPIC30F6012A30I / PT, and the model of the handheld device 400 may be T60KM.

[0078] The working principle of the railway special trolley protection system in this application is as follows:

[0079] When in use, the battery can supply power to the vehicle body, and the vehicle body can be used to transport goods. When the vehicle body is operated, the servo motor is started to drive the first bevel gear to rotate, and then drive the second bevel gear meshing with the first bevel gear to rotate, thereby driving the drive rod welded to the second bevel gear to rotate, and the drive rod is used to drive the casters to rotate automatically, thereby realizing the automatic movement of the vehicle body. At the same time, when the staff loads or unloads goods on the vehicle body, the four electric telescopic rods can be started to drive the corresponding fixed plates to descend to press against the ground, thereby realizing automatic braking of the vehicle body, improving the braking effect of the vehicle body, and enhancing the stabilization effect of the device. At the same time, by installing a handheld device on the vehicle body and utilizing the electronic modules such as GPS positioning and network communication inside the handheld device, the vehicle body can be sent to the background host body. The operating position of the device optimizes the performance of the mobile terminal and can receive alarm information sent by the background host body, thereby enhancing the practicability of the device. On the other hand, screws connected to the operating handle are provided at both ends of the handheld device, which facilitates the disassembly and maintenance of the handheld device. At the same time, the background host body can also receive the position of each running train equipped with a GPS locator in real time, which is convenient for data reception. By arranging a parking sign body next to the railway track, the display screen on the parking sign body will receive the data sent by the background host body, so that the parking sign body can electronically and intelligently remind the situation of the mobile parking signal board. In addition, the user can use the threaded connection between the assembly block and the assembly groove to disassemble or assemble the fixed plate at the bottom of the electric telescopic rod, thereby facilitating the user to maintain and replace the fixed plate.

[0080] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A railway special trolley (100), characterized in that: It includes: Vehicle body (10); as well as Casters (20) rotatably disposed at the bottom of the vehicle body (10); as well as a driving mechanism (30), which is arranged on the vehicle body (10) and connected to the caster (20), and the driving mechanism (30) is used to drive the caster (20) to rotate; and A telescopic support mechanism (40) is arranged on the vehicle body (10), and the telescopic support mechanism (40) is used to lift and support the vehicle body (10); The railway special trolley (100) is constructed such that the telescopic support mechanism (40) therein can be extended to raise the vehicle body (10) and allow the caster (20) to be suspended in the air, so as to realize the fixed support function of the telescopic support mechanism (40) on the vehicle body (10), and the telescopic support mechanism (40) therein can be shortened to lower the vehicle body (10) so as to allow the caster (20) to contact the ground and roll.

2. The railway-specific trolley (100) according to claim 1, characterized in that: The driving mechanism (30) comprises: A servo motor (31), a fixed end of which is fixed on the vehicle body (10), and the servo motor (31) is extended in a first direction; and a first gear (32) connected to a driving shaft of the servo motor (31); and a second gear (33) meshing with the first gear (32), wherein a central axis of the second gear (33) is arranged at an angle of 90 degrees to a central axis of the first gear (32); A driving rod (34), the outer circumference of which is provided with the second gear (33), and the two ends of the driving rod (34) are provided with the casters (20); The first gear (32), the second gear (33) and the driving rod (34) can transmit the rotation torque of the servo motor (31) to the caster (20), so that the caster (20) can roll on the ground.

3. The railway-specific trolley (100) according to claim 2, characterized in that: The first gear (32) and the second gear (33) are bevel gears.

4. The railway-specific trolley (100) according to claim 1, characterized in that: The telescopic support mechanism (40) comprises: A first telescopic assembly (41), one end of which is fixed to the bottom of the vehicle body (10); and A second telescopic assembly (42), one end of which is fixed to the bottom of the vehicle body (10), and the second telescopic assembly (42) and the first telescopic assembly (41) are spaced apart in a second direction; The other end of the first telescopic component (41) is a telescopic end, and the other end of the second telescopic component (42) is a telescopic end. The other end of the first telescopic component (41) and the other end of the second telescopic component (42) can be synchronously extended to contact the ground.

5. The railway-specific trolley (100) according to claim 4, characterized in that: The first telescopic assembly (41) comprises: A driving member (411), a fixed end of which is fixed to the bottom of the vehicle body (10); and an assembly block (412) connected to the driving end of the driving member (411); and The fixing plate (413) is provided with a slot (4131), and the slot (4131) is engaged with the assembly block (412).

6. The railway-specific trolley (100) according to claim 5, characterized in that: The driving member (411) is an electric push rod or a driving cylinder or a jack.

7. The railway special vehicle (100) according to claim 6, characterized in that: When the driving member (411) is an electric push rod, a storage battery (50) is provided on the vehicle body (10), and the storage battery (50) is electrically connected to the electric push rod for supplying power to the electric push rod.

8. The railway-specific trolley (100) according to claim 4, characterized in that: The first telescopic assembly (41) and the second telescopic assembly (42) have the same structure.

9. The railway special vehicle (100) according to claim 1, characterized in that: It also includes an operating handle (60) which is arranged on the vehicle body (10), and the operating handle (60) is used for manually pushing the railway-specific trolley (100) to move.

10. A railway special trolley protection system, characterized in that: include: Matching parking signs (200), which are respectively arranged at both ends of the operation area; as well as A backstage host body (300) electrically connected to the matching parking sign (200); and The railway trolley (100) according to any one of claims 1 to 9, which moves in the working area; A handheld device (400) is arranged on the railway special vehicle (100) and is electrically connected to the background host body (300). The handheld device (400) can collect current position information of the railway special vehicle (100) and send it to the background host body (300); The protection system for the railway-specific trolley (100) is constructed such that when the background host body (300) detects that the current position of the railway-specific trolley (100) exceeds the area of ​​the operation area, the background host body (300) can send a first alarm instruction to the handheld device (400), the handheld device (400) receives the first alarm instruction and issues a voice alarm, and the background host body (300) sends a second alarm instruction to the matching parking sign (200), the matching parking sign (200) receives the second alarm instruction and displays an alarm on the screen.

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