Signal transmission device, wheeled mobile equipment and train-ground communication system

Abstract

The invention provides a signal transmission device, wheeled mobile equipment and a vehicle-ground communication system. The signal transmission device is used for being installed on the wheel type mobile equipment, the wheel type mobile equipment comprises a wheel shaft, the signal transmission device comprises a control assembly, the control assembly comprises a first disc support assembly, the first disc support assembly comprises a disc support and a driving device, the driving device comprises a fixing part and a driving part, the fixing part is used for being fixed to the wheel shaft, and the driving part is used for being fixed to the wheel shaft; the driving part is fixed on the disc support, and the disc support is used for fixing the first end of the optical signal transmission line and winding or releasing the optical signal transmission line during rotation. Communication connection can be realized through the optical signal transmission line, so that the communication bandwidth is increased, and the communication performance is improved.

Description

Technical Field

[0001] The present application relates to the field of optical communication technology, and in particular to a signal transmission device, a wheeled mobile device, and a vehicle-to-ground communication system. Background Art

[0002] For rail transit equipment, vehicle-to-ground communication is required to realize signal transmission between rail transit equipment and ground network. Vehicle-to-ground communication provides a data channel for rail transit equipment, carrying data transmission of wheeled mobile equipment control, comprehensive dispatching, locomotive video, locomotive operation data and maintenance operations.

[0003] With the development of intelligent railways, the requirements for vehicle-ground communication are gradually increasing. However, the communication method used in related technologies has a small communication bandwidth and has phenomena such as Doppler shift, which leads to reduced communication performance. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a signal transmission device, a wheeled mobile device and a vehicle-to-ground communication system, which can achieve communication connection through an optical signal transmission line to increase the communication bandwidth and improve the communication performance.

[0005] In a first aspect of the present application, a signal transmission device is provided, which is used to be installed on a wheeled mobile device. The wheeled mobile device includes a wheel axle and an on-board communication device, and the signal transmission device includes: a control component, the control component includes a first disc tray component, the first disc tray component includes a disc tray and a driving device, the driving device includes a fixing part and a driving part, the fixing part is used to be fixed on the wheel axle, the driving part is fixed on the disc tray, and the disc tray is used to fix one end of an optical signal transmission line and wind the optical signal transmission line or release the optical signal transmission line when rotating.

[0006] Wheeled mobile equipment can be high-speed trains, motor vehicles, trains and other vehicles that need to stop at fixed stations. Each station is equipped with station communication equipment and wiring piles, and the wiring piles are connected to the station communication equipment. Each station communication equipment is connected to the control center. Wheeled mobile equipment may include vehicle-mounted communication equipment.

[0007] In a possible implementation, when the signal transmission device is installed on a wheeled mobile device, the fixed part of the driving device can be installed on the axle of the wheeled mobile device, the first end of the optical signal transmission line is fixedly connected to the disc tray, and the reel-shaped optical signal transmission line is put on the disc tray and connected to the vehicle-mounted communication device, and the second end of the optical signal transmission line is connected to the wiring post. In this way, the vehicle-mounted communication device can be connected to the wiring post through the optical signal transmission line, thereby realizing the communication connection with the station communication device. Thus, the signal transmission between the vehicle-mounted communication device and the station communication device through the optical signal transmission line can be realized. Therefore, the present application can realize the communication connection between the vehicle-mounted communication device and the station communication device through the optical signal transmission line, thereby increasing the communication bandwidth and improving the anti-interference ability of the signal transmission. Moreover, the problem of Doppler frequency shift and frequent base station switching due to the high-speed driving of the wheeled mobile device will not be caused, resulting in a decrease in communication performance, thereby ensuring a reliable communication connection.

[0008] A wheel is fixed on the axle, and the wheel can roll on the road surface or track surface to drive the wheeled mobile device to move. The fixed part of the driving device is fixed on the axle. When the wheeled mobile device moves, the wheel can drive the fixed part to rotate synchronously, that is, the rotation speed of the fixed part is the same as the rotation speed of the wheel. The driving part can rotate relative to the fixed part, and the driving part is fixed on the disc tray. Therefore, the driving device can compensate the rotation speed of the disc tray while rotating synchronously with the axle, so that the rotation speed of the disc tray is greater than the rotation speed of the wheel. When the disc tray rotates, the optical signal transmission line wound on the disc tray can be gradually released from the disc tray as the disc tray rotates, and placed beside the track.

[0009] Since the disc tray is fixed on the wheel axle, the cross section of the disc tray can be circular. In order to avoid the disc tray from colliding with the track or objects beside the track, the diameter of the disc tray is usually smaller than the diameter of the wheel. When the rotation speed of the disc tray is greater than the rotation speed of the wheel, the linear speed of the optical signal transmission line released from the disc tray can be consistent with the linear speed of the wheeled mobile device, so that the release speed of the optical signal transmission line is consistent with the travel speed of the wheeled mobile device, avoiding the situation where the optical signal transmission line is damaged due to the different speeds of the two, thereby affecting the signal transmission. Therefore, the present application can achieve reliable communication connection.

[0010] In another possible implementation, an optical signal transmission line has been placed beside the track, and the second end of the optical signal transmission line is connected to the wiring post of the next station that the wheeled mobile device needs to reach. When the signal transmission device is installed on the wheeled mobile device, the fixed part of the drive device can be installed on the wheel axle of the wheeled mobile device, and the first end of the optical signal transmission line beside the track is fixed on the tray, and the optical cable interface on the tray is also connected to the vehicle-mounted communication device. In this way, the vehicle-mounted communication device can be connected to the wiring post through the optical signal transmission line, thereby realizing communication connection with the station communication device. In this way, signal transmission between the vehicle-mounted communication device and the station communication device can be realized.

[0011] Similar to the above embodiment, the driving device can also compensate the rotation speed of the tray while rotating synchronously with the wheel axle, so that the rotation speed of the tray is greater than the rotation speed of the wheel. When the tray rotates, the optical signal transmission line beside the track is wound around the tray as the tray rotates.

[0012] Since the disc tray is fixed on the wheel axle, the cross section of the disc tray can be circular. In order to avoid the disc tray from colliding with the track or objects beside the track, the diameter of the disc tray is usually smaller than the diameter of the wheel. When the rotation speed of the disc tray is greater than the rotation speed of the wheel, the linear speed of the optical signal transmission line wound on the disc tray can be consistent with the linear speed of the wheeled mobile device, so that the winding speed of the optical signal transmission line is consistent with the travel speed of the wheeled mobile device, avoiding the situation where the optical signal transmission line is damaged due to the different speeds of the two, thereby affecting the signal transmission. Therefore, the present application can achieve reliable communication connection.

[0013] In addition, the power source of the pan tray mainly comes from the power output of the wheel axle, so a low-power drive device can be configured to meet the rotation speed requirement of the pan tray, thereby reducing the cost of the drive device.

[0014] In some embodiments, the fixing part is used to be sleeved and fixed on the axle, the driving part is sleeved on the fixing part, and the disc tray is connected to the driving part along the axial direction of the driving part. Since the axle and the wheel are usually coaxially arranged, after the fixing part is fixed to the axle, the disc tray can be located on the side of the driving part away from the wheel, so as to facilitate the release of the optical signal transmission line wound on the disc tray or the optical signal transmission line on the trackside is wound on the disc tray.

[0015] In some embodiments, the disc tray includes a first limiting plate and a second limiting plate that are relatively arranged and a body located between the first limiting plate and the second limiting plate, the first limiting plate is fixed to the driving part, and the second limiting plate is detachably connected to the body. The optical signal transmission line can be wound around the body, and the plate surface diameters of the first limiting plate and the second limiting plate can be larger than the diameter of the body, thereby limiting the optical signal transmission line and preventing the optical signal transmission line from falling from the body. In the process of installing the signal transmission device on the wheeled mobile device, the reel-shaped optical signal transmission line is installed on the disc tray. In this process, the first limiting plate of the disc tray can be installed toward the wheel, the second limiting plate can be removed from the body, and after the reel-shaped optical signal transmission line is installed on the body, the second limiting plate can be installed on the body, thereby facilitating the installation of the reel-shaped optical signal transmission line on the wheel axle.

[0016] In some embodiments, the first disc tray assembly also includes a ratchet and a pawl, the pawl is used to be fixed on the wheel axle, the ratchet is sleeved and connected to the wheel axle through the pawl, and the driving part is fixedly connected to the disc tray through the ratchet; the pawl is used to provide a force to the ratchet to prevent the disc tray from reversing relative to the wheel axle. When the wheeled mobile device decelerates or brakes, the disc tray will continue to rotate at the original speed due to inertia, and the disc tray will be relatively different from the driving speed of the wheeled mobile device, thereby causing the pay-off speed or take-up speed of the optical signal transmission line to be different from the driving speed of the wheeled mobile device. At this time, the driving part of the driving device needs to be reversed relative to the wheel axle to drive the rotation speed of the disc tray to slow down. The pawl can provide a force to the ratchet to prevent the disc tray from reversing relative to the wheel axle, thereby avoiding the disc tray from reversing relative to the wheel axle, which causes the pay-off speed of the optical signal transmission line to be different from the driving speed of the mobile device, thereby causing the optical signal transmission line to break.

[0017] In some embodiments, the control assembly further includes a second tray assembly, and the second tray assembly is used to wind the optical signal transmission line extending from the first tray assembly, and the second end of the optical signal transmission line extends out of the second tray assembly. The optical signal transmission line can be an optical cable, and the optical cable includes an optical fiber, and the optical fiber has a small diameter and a light weight, resulting in a light weight of the optical cable. It is easy to become loose when released from the first tray assembly. When the control assembly further includes a second tray assembly, the reel-shaped optical signal transmission line can be sleeved on the first tray assembly, one end of the optical signal transmission line can be extended out of the first tray assembly, and the extended part can be generally wound around the second tray assembly, so that the first tray assembly and the second tray assembly can release the optical signal transmission line together.

[0018] Moreover, the second disc tray assembly has the same structure as the first disc tray assembly. The second disc tray assembly may also include a disc tray and a driving device, wherein the fixing portion of the driving device is fixed to the wheel shaft, and the driving portion is fixed to the disc tray, and the disc tray may also be driven to rotate by the rotation of the wheel shaft, and the disc tray may be provided with speed compensation by the driving device, so that the rotation of the first disc tray assembly and the second disc tray assembly are kept synchronously rotating.

[0019] In some embodiments, the control component also includes a tension mechanism and a base, the tension mechanism is connected to the base, the tension mechanism is located between the first disc tray assembly and the second disc tray assembly, and a portion of the outer surface of the tension mechanism is used to abut against the optical signal transmission line and detect the tension value of the optical signal transmission line.

[0020] In some embodiments, the control assembly further comprises a positioning roller connected to the base, the positioning roller being located between the first tray assembly and the second tray assembly, and the outer surface of the positioning roller being used to abut against the optical signal transmission line. In this way, the positioning roller not only provides a positioning function for a portion of the optical signal transmission line, but also enables the optical signal transmission line to be tightened, so that the optical signal transmission line can be released smoothly.

[0021] Moreover, the number of the positioning rollers is at least two, the first positioning roller of the at least two positioning rollers is closer to the second pan tray assembly, and the second positioning roller is closer to the first pan tray assembly.

[0022] In some embodiments, the control assembly further comprises a tensioning roller connected to the base, the tensioning roller is located on a side of the second tray assembly close to the first tray assembly, and the optical signal transmission line is clamped between the second tray assembly and the tensioning roller. In this way, the tensioning roller can provide pressure toward the axial direction of the tray for the optical signal transmission line, thereby providing friction for the optical signal transmission line, thereby, the optical signal transmission line can be smoothly released under the action of the friction force, and the optical signal transmission line is prevented from "slipping".

[0023] In some embodiments, the control assembly further includes a controller, the controller is electrically connected to the drive device, and the controller is used to: when the wheeled mobile device is traveling, control the drive unit of the drive device to rotate in a first direction, the first direction being the same as the rotation direction of the wheel axle. In this way, the control device can provide rotation speed compensation for the tray, so that the speed at which the optical signal transmission line is released from the tray is the same as the travel speed of the wheeled mobile device.

[0024] In some embodiments, the wheeled mobile device further comprises a wheel fixed on the wheel axle; the controller is specifically used to: calculate the first speed according to the diameter of the second pan support assembly, the rotation speed of the wheel and the tread diameter of the wheel, the tread diameter being the diameter of the surface of the wheel in contact with the load-bearing surface; and control the driving device of the second pan support assembly to rotate at the first speed. In this way, the rotation speed of the second pan support assembly can be determined more accurately.

[0025] In some embodiments, the controller is further configured to: when the wheeled mobile device stops, control the driving unit of the driving device to rotate in a second direction, the second direction being opposite to the rotation direction of the wheel axle. When the wheeled mobile device stops, the first disc support assembly and the second disc support assembly still rotate in the rotation direction of the wheel axle under the action of the inertial force, and their actual rotation speed is greater than the theoretical rotation speed, thereby causing the wheeled mobile device to still pay out the line when it stops. In this case, the controller controls the driving unit to rotate in a direction opposite to the rotation direction of the wheel axle, thereby overcoming the inertial force and causing the wheeled mobile device to stop paying out the line.

[0026] In some embodiments, the control assembly further includes a detector, the detection end of the detector faces the optical signal transmission line wound on the first tray assembly, and the detector is used to detect the maximum diameter of the optical signal transmission line portion wound on the first tray assembly; the controller is also used to: calculate the second rotation speed according to the maximum diameter detected by the detector, the rotation speed of the wheel, and the tread diameter of the wheel; and control the driving device of the first tray assembly to rotate at the second rotation speed. Since the reel-shaped optical signal transmission line is sleeved on the tray of the first tray assembly, as the optical signal transmission line is released, the optical signal transmission line wound on the tray of the first tray assembly becomes less and less, the maximum diameter of the optical signal transmission line portion wound on the first tray assembly also becomes smaller and smaller, and its unwinding speed also becomes smaller and smaller. The controller calculates the second rotation speed according to the maximum diameter detected by the detector, the rotation speed of the wheel, and the tread diameter of the wheel, thereby making the calculation of the second rotation speed more accurate.

[0027] In some embodiments, the control assembly further includes a tension mechanism, which is electrically connected to the controller, and is used to detect the tension value of the optical signal transmission line and send the tension value to the controller; the controller is further used to: adjust the second rotation speed according to the tension value and the preset tension value to obtain the third rotation speed; and control the driving device of the first disc tray assembly to rotate at the third rotation speed. When the speed at which the disc tray of the first disc tray assembly releases the optical signal transmission line is different from the speed at which the disc tray of the second disc tray assembly releases the optical signal transmission line due to manufacturing errors and other reasons, the tension of the tension mechanism will change. Therefore, when determining the rotation speed of the driving device, the tension value measured by the tension mechanism and the theoretical preset tension value are fully considered, so that the measured tension value is basically the same as the preset tension value, thereby ensuring that the speed at which the disc tray of the first disc tray assembly releases the optical signal transmission line is as close as possible to the speed at which the disc tray of the second disc tray assembly releases the optical signal transmission line.

[0028] In some embodiments, the signal transmission device includes at least two control components, and at least two control components are respectively used to wind different optical signal transmission lines, and the second end of each optical signal transmission line is respectively used to connect to station communication equipment at different stations; when the wheeled mobile device moves, the optical signal transmission line on the first control component of the at least two control components is released from the first tray component, and the optical signal transmission line of the second control component is wound on the first tray component. In this way, the on-board communication equipment can be respectively connected to the station communication equipment of different stations through at least two optical signal transmission lines, so that the communication path between the on-board communication equipment and the control center includes at least two. When one of the communication paths fails, the other communication path can still realize signal transmission, thereby improving the reliability of the communication connection.

[0029] In a second aspect of the present application, there is also provided a wheeled mobile device, comprising a vehicle body, a wheel axle, and a signal transmission device of any of the above embodiments, wherein the wheel axle is rotatably connected to the vehicle body, and a first disc support assembly of the signal transmission device is connected to the wheel axle or the vehicle body. The wheeled mobile device can achieve all the effects of the signal transmission device.

[0030] In some embodiments, the signal transmission device further includes a second disc tray assembly, and the first disc tray assembly and the second disc tray assembly are respectively connected to different axles. In this way, the disc tray of the first disc tray assembly and the disc tray of the second disc tray assembly can be driven to rotate by the axle, and the speed compensation is provided by the driving device, so that the pay-off speed of the optical signal transmission line is the same as the driving speed of the wheeled mobile device. In addition, the power source of the disc tray mainly comes from the power output of the axle, so a low-power driving device can be configured to meet the speed requirement of the disc tray, thereby reducing the cost of the driving device.

[0031] Moreover, the first disc tray assembly and the second disc tray assembly are respectively connected to two adjacent axles, so that the optical signal transmission line can be prevented from being wound around other axles due to the presence of other axles between the first disc tray assembly and the second disc tray assembly.

[0032] In some embodiments, the wheeled mobile device further includes a signal detection device and an optical signal transmission line; the optical signal transmission line includes a plurality of sub-optical signal transmission lines, the first end of the first sub-optical signal transmission line among the plurality of sub-optical signal transmission lines is connected to the vehicle-mounted communication device in the wheeled mobile device through the signal detection device, and the first sub-optical signal transmission line is used to receive the first optical signal sent by the signal detection device, and when subjected to an impact force, sends a second optical signal to the signal detection device, so that the signal detection device determines the location where the impact force occurs according to the second optical signal. In this way, when a foreign object falls onto the optical signal transmission line and presses on the optical signal transmission line, the first sub-optical signal transmission line can detect the impact force, thereby sending a second optical signal to the signal detection device, so that the signal detection device determines the presence of a foreign object, and can determine the location where the foreign object occurs according to the second optical signal. The location is transmitted to the control center through the vehicle-mounted communication device to facilitate maintenance by the staff.

[0033] In a third aspect of the present application, a vehicle-to-ground communication system is provided, comprising a station communication device, a vehicle-mounted communication device, an optical signal transmission line, and a signal transmission device of any of the above embodiments, wherein a first end of the optical signal transmission line is connected to the signal transmission device, a second end of the optical signal transmission line is connected to the station communication device, and the signal transmission device is communicatively connected to the vehicle-mounted communication device. The vehicle-to-ground communication system can achieve all the effects of the signal transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 It is a structural diagram of a vehicle-to-ground communication system in the first related technology;

[0036] Figure 2 is a structural diagram of a vehicle-to-ground communication system in a second related technology;

[0037] Figure 3 This is a schematic diagram of the structure of the communication connection between the wheeled mobile device and the station in one embodiment of the present application;

[0038] Figure 4 for Figure 3 In the illustrated embodiment, a schematic diagram of the structure of the communication connection between the wheeled mobile device and the equipment in the station when the wheeled mobile device departs from the station m;

[0039] Figure 5 for Figure 3In the illustrated embodiment, a schematic diagram of the structure of the communication connection between the wheeled mobile device and the equipment in the station when the wheeled mobile device is about to arrive at the station m+1;

[0040] Figure 6 for Figure 5 A schematic diagram of the structure of the connection between the first control assembly and the wheel axle in the illustrated embodiment;

[0041] Figure 7 for Figure 6 In the illustrated embodiment, a schematic diagram of the structure of the first disc support assembly connected to the wheel axle;

[0042] Figure 8 for Figure 7 A schematic diagram of the structure of the connection between the drive device and the wheel axle in the illustrated embodiment;

[0043] Fig. 9 for Figure 7 A schematic diagram of the structure of the connection between the ratchet, the pawl and the axle in the illustrated embodiment;

[0044] Fig.10 for Figure 7 In the illustrated embodiment, a schematic diagram of the structure of the disc holder;

[0045] Fig.11 is a flow chart of a method for controlling the rotation speed of a tray of a first tray assembly;

[0046] Fig.12 is a flow chart of a method for controlling the rotation speed of a tray of a second tray assembly;

[0047] Fig.13 is a schematic diagram of the tread diameters of two adjacent wheels;

[0048] Fig.14 for Fig.12 A schematic diagram of a specific process of controlling the speed of the driving part of the driving device relative to the fixed part in the process shown;

[0049] Fig.15 It is a structural schematic diagram of a situation in which a foreign object falls onto an optical signal transmission line when a wheeled mobile device is running on a track;

[0050] Fig.16 for Figure 4 In the illustrated embodiment, a schematic cross-sectional view of an optical signal transmission line;

[0051] Fig.17 for Figure 5 A schematic diagram of the structure in which the second control assembly is connected to the wheel axle in the illustrated embodiment.

[0052] Icons: 11-wireless controller; 12-switch; 13-trackside AP; 15-control center; 16-core network; 17-cluster server; 18-dispatching console; 19-transmission network; 110-base station; 112-station communication equipment; 113-wiring pile; 114-optical cable; 115-foreign matter; 2-wheeled mobile equipment; 21-on-board communication equipment; 22-on-board terminal equipment; 23-optical signal transmission line; 231-sub-optical signal transmission line; 2311-first sub-optical signal transmission line; 2312-second sub-optical signal transmission line; 24-vehicle body; 25-axle; 26-wheel; 27-signal detection device; 3-signal transmission transport device; 30-control component; 31-first control component; 32-second control component; 33-first disc support component; 331-disc support; 3311-first limit plate; 3312-second limit plate; 3313-main body; 332-driving device; 3321-fixing part; 3322-driving part; 333-ratchet; 3331-first mounting hole; 3332-second mounting hole; 334-ratchet; 335-slip ring; 34-second disc support component; 35-base; 36-tension mechanism; 361-power component; 362-tension roller; 38-positioning roller; 39-tensioning roller; 310-controller; 311-detector. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] The term "and / or" herein is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone, wherein A and B may be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one (item)" refers to one or more, and "plurality" refers to two or more. "At least one of the following (items)" or similar expressions refers to any combination of these items, including any combination of single (items) or plural (items). For example, at least one (item) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or multiple.

[0055] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0056] "Connected", "connected" and similar words are used to express the intercommunication or interaction between different components, which may include direct connection or indirect connection through other components. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, inclusion of a series of steps or units. Methods, systems, products or devices are not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. "Up", "down", "left", "right" and the like are only used relative to the orientation of the components in the drawings. These directional terms are relative concepts. They are used for description and clarification relative to the description, which may change accordingly according to the change of the orientation of the components in the drawings.

[0057] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0058] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0059] For wheeled mobile equipment, vehicle-to-ground communication is the communication between the wheeled mobile equipment and the ground network. Vehicle-to-ground communication provides a data channel between the wheeled mobile equipment and the ground network, carrying data transmission for wheeled mobile equipment control, comprehensive dispatch, locomotive video, locomotive operation data, maintenance operations and other services.

[0060] With the development of intelligent railways, vehicle-to-ground communication has evolved from supporting the "safe operation" and "punctuality" of wheeled mobile equipment to supporting "comfortable routes", "flexible scheduling", "digital equipment" and "real-time detection". These changes have led to a gradual increase in the requirements for vehicle-to-ground communication. Specifically, it requires a larger transmission bandwidth, a lower packet loss rate, and a lower latency.

[0061] At present, wireless communication is mainly used to achieve vehicle-ground communication. For example, in a related technology, wireless fidelity (Wi-Fi) technology is used to achieve vehicle-ground communication. Wi-Fi technology can realize communication based train control (CBTC), signal transmission in passenger information system (PIS), signal transmission in CCTV (closed circuit television, CCTV), trackside Internet of Things and other services. Figure 1 As shown, the vehicle-to-ground communication system for realizing vehicle-to-ground communication includes: a control center 15, a wireless controller (AC) 11, a switch 12, and a trackside access point (AP) 13. The wheeled mobile device includes a vehicle-mounted communication device 21. Among them, the control center 15 is connected to the wireless controller 11 for communication, and the wireless controller 11 and the trackside AP 13 are connected to each other through the switch 12. The trackside AP 13 and the vehicle-mounted communication device 21 are connected via Wi-Fi. It can be understood that Figure 1 In the figure, the solid line represents a wired connection and the dotted line represents a wireless connection.

[0062] However, the frequency bands of signals used in Wi-Fi technology are mainly 2.4GHz and 5GHz. Both frequency bands are public frequency bands, and signals are easily interfered, and safety cannot be guaranteed. For example, when the Wi-Fi hotspot of a mobile phone is turned on, it will interfere with the signal transmission and reception of the trackside AP13. Therefore, in terms of safety, the vehicle-to-ground communication system using Wi-Fi technology cannot meet the requirements for high signal availability.

[0063] In addition, Wi-Fi technology has a high number of reselection times and a low success rate under high-speed movement. Its coverage distance is about 50 meters. As the wheeled mobile device moves at high speed, the on-board communication device 21 and the trackside AP 13 need to frequently disconnect and reconnect. Therefore, a complex algorithm is required to solve the problem, which is costly.

[0064] In another related technology, a vehicle-to-ground communication system using dedicated frequency band resources can avoid signal interference when using public frequency bands, thereby meeting the availability requirements of vehicle-to-ground communication. For example, the vehicle-to-ground communication system uses the long term evolution-railway (LTE-R) system. Figure 2As shown, the vehicle-to-ground communication system includes: a control center 15, a transmission network 19 and a base station 110. Among them, the control center 15 includes a core network 16, a cluster server 17 and a dispatching station 18, and the core network 16, the cluster server 17 and the dispatching station 18 are connected to each other in communication, and are all connected to the base station 110 in communication through the transmission network 19. The base station 110 is connected to the vehicle-mounted communication device 21 in communication, and the vehicle-mounted communication device 21 can be a vehicle-mounted access unit (TAU).

[0065] However, in this related technology, the communication bandwidth is relatively small, for example, the frequency band of frequency division duplex (FDD) is 874.4MHz-880.0MHz / 919.4MHz-925.0MHz, and the frequency band of time division duplex (TDD) is 1900MHz-1910MHz. Since the authorized bandwidth of these two frequency bands is about 10MHz, they cannot meet the needs of services such as over-the-horizon surveillance, video modulation, vehicle status data, and vehicle-mounted video transmission that require larger bandwidth.

[0066] In addition, when the wheeled mobile equipment is a high-speed moving device such as a high-speed train or a motor vehicle, there will be Doppler frequency shift and frequent base station switching, which will lead to reduced transmission performance.

[0067] Based on this, the embodiment of the present application provides a vehicle-to-ground communication system, such as Figure 4 As shown, the vehicle-ground communication system includes station communication equipment 112, optical cables 114, terminal posts 113, vehicle-mounted communication equipment 21, optical signal transmission lines 23, signal transmission devices 3 and a control center 15.

[0068] The vehicle-mounted communication device 21, the signal transmission device 3 and the optical signal transmission line 23 may belong to the wheeled mobile device 2. The wheeled mobile device 2 may be a rail transit device, such as a high-speed rail, a train, a magnetic levitation wheeled mobile device and an urban rail transit. The wheeled mobile device 2 may also be a non-rail transit, that is, a vehicle traveling on the road. The wheeled mobile device 2 may be docked at a fixed station.

[0069] For example, Figure 3 As shown, there are N stations, namely, Station 1, Station 2... Station m, Station m+1... Station N-1 and Station N. Figure 4As shown, each station is provided with station communication equipment 112, terminal posts 113 and optical cables 114. Exemplarily, station m and station m+1 are both provided with station communication equipment 112, terminal posts 113 and optical cables 114. The station communication equipment 112 and the terminal posts 113 are connected via optical cables 114, and the station communication equipment 112 and the control center 15 are also connected via optical cables. It can be understood that the optical cables 114 between the station communication equipment 112 and the terminal posts 113, and the optical cables between the station communication equipment 112 and the control center 15 can be buried underground.

[0070] The station communication devices 112 of every two adjacent stations are connected in communication, for example, by optical cables. The station communication device 112 of at least one station is connected in communication with the control center 15. For example, the station communication device 112 of station 1 is connected in communication with the control center 15, and the station communication device 112 of station N is also connected in communication with the control center 15. Station 2, station 3, ... station N-1 can be connected in communication with the control center 15 through station 1 or station N. In this way, the station communication device 112 of each station can be connected in communication with the control center 15.

[0071] like Figure 3 As shown, when the wheeled mobile device 2 travels between station m and station m+1, the on-board communication device 21 of the wheeled mobile device 2 can be communicated with the station communication device 112 of station m and the station communication device 112 of station m+1 respectively, thereby being able to communicate and connect to the control center 15 through station m and other stations, or to communicate and connect to the control center 15 through station m+1 and other stations.

[0072] like Figure 4 As shown, the wheeled mobile device 2 includes, in addition to the vehicle-mounted communication device 21, the signal transmission device 3 and the optical signal transmission line 23, a body 24, a wheel axle ( Figure 4 Not shown), wheels ( Figure 4 The vehicle-mounted terminal device 21 is connected to the vehicle body 24, the wheel is fixed to the axle, and the vehicle-mounted communication device 21 is fixed in the vehicle body 24. The vehicle-mounted terminal device 22 and the vehicle-mounted communication device 21 are connected in communication, for example, by an optical cable connection or a wireless connection.

[0073] In one application scenario, the vehicle terminal device 22 may be a vehicle camera, which can capture the video inside or outside the wheeled mobile device 2 when the wheeled mobile device 2 is moving or stationary, and transmit the video to the vehicle communication device 21. The vehicle communication device 21 needs to transmit the video to Figure 3 The control center 15 shown in the figure performs fault diagnosis based on the video. At the same time, the control center 15 can also perform parameter configuration on the vehicle-mounted camera.

[0074] The wheeled mobile device 2 may include a plurality of optical signal transmission lines 23, for example, Figure 4 As shown, the wheeled mobile device 2 may include two optical signal transmission lines 23. For ease of description, the two optical signal transmission lines 23 are 23a and 23b. The first ends of the optical signal transmission lines 23a and 23b are respectively connected to the on-board communication device 21 of the wheeled mobile device 2. The second ends of the optical signal transmission lines 23a and 23b are respectively connected to different stations. For example, Figure 4 As shown, the wheeled mobile device 2 is located between station m and station m+1, the second end of the optical signal transmission line 23a is connected to the wiring post 113 at station m, and is communicatively connected to the control center 15 through the wiring post 113 and the station communication device 112; the second end of the optical signal transmission line 23b is connected to the wiring post 113 at station m+1, and is communicatively connected to the control center 15 through the wiring post 113 and the station communication device 112. The first ends of the optical signal transmission line 23a and the optical signal transmission line 23b are both connected to the vehicle-mounted communication device 21. In this way, the vehicle-mounted communication device 21 is connected to the station communication device 112 of station m through the optical signal transmission line 23a, the wiring post 113, and the optical cable 114, and the vehicle-mounted communication device 21 can also be connected to the station communication device 112 of station m+1 through the optical signal transmission line 23b, the wiring post 113, and the optical cable 114. Therefore, the communication connection between the wheeled mobile device 2 and the station communication device 112 can be realized through the optical signal transmission line 23. The optical signal transmission line 23 can be an optical cable, for example, a multi-core optical cable; the optical signal transmission line 23 can also be an optoelectronic composite cable, thereby increasing the communication bandwidth and improving the anti-interference ability of signal transmission. Moreover, it will not cause the communication performance to deteriorate due to the high-speed driving of the wheeled mobile device 2, resulting in Doppler frequency shift and frequent base station switching, thereby ensuring a reliable communication connection.

[0075] Since the wheeled mobile device 2 is a high-speed mobile device, and the station communication device 112 is a device fixed in the station, the wheeled mobile device 2 moves relative to the station communication device 112. For example, Figure 5 As shown, the wheeled mobile device 2 travels from station m to station m+1. During the travel of the wheeled mobile device 2, the optical signal transmission line 23a near the rear of the vehicle is released as the wheeled mobile device 2 travels, and the optical signal transmission line 23b near the front of the vehicle is reeled in as the wheeled mobile device 2 travels, thereby making the release speed of the optical signal transmission line 23a near the rear of the vehicle and the reeling speed of the optical signal transmission line 23b near the front of the vehicle substantially the same as the travel speed of the wheeled mobile device 2.

[0076] like Figure 4As shown, the signal transmission device 3 includes at least two control components 30. Exemplarily, in this embodiment, the signal transmission device 3 includes two control components 30. For ease of description, the two control components 30 are respectively named as a first control component 31 and a second control component 32. Figure 5 As shown, the first control component 31 is close to the rear of the wheeled mobile device 2 , and the second control component 32 is close to the front of the wheeled mobile device 2 .

[0077] like Figure 4 As shown, the optical signal transmission line 23a is wound around the first control component 31, and the optical signal transmission line 23b is wound around the second control component 32. During the travel of the wheeled mobile device 2, the optical signal transmission line 23a wound around the first control component 31 is gradually released from the first control component 31 and placed beside the track. The first end of the optical signal transmission line 23b pre-placed beside the track is connected to the second control component 32. During the travel of the wheeled mobile device 2, the optical signal transmission line 23b pre-placed beside the track is wound around the second control component 32, while the optical signal transmission line 23a wound around the first control component 31 is released and placed beside the track. Thus, there are two communication paths between the wheeled mobile device 2 and the control center 15. A static or dynamic protection protocol can be used to first specify one of the communication paths for communication. When a failure occurs in the communication path, it can be switched to another communication path within 50ms.

[0078] Except for the first wheeled mobile device 2 running on the same track, each wheeled mobile device 2 will place an optical signal transmission line 23 on the trackside between station m and station m+1 when traveling from station m to station m+1; when the next wheeled mobile device 2 travels from station m to station m+1, the optical signal transmission line 23 placed on the trackside by the previous wheeled mobile device 2 can be wound around the second control component 32, and the optical signal transmission line 23 can be placed on the trackside by the first control component 31. In other words, the second control component 32 of each wheeled mobile device 2 retracts the optical signal transmission line 23 placed by the previous wheeled mobile device 2. For the first wheeled mobile device 2 traveling on the track, an optical signal transmission line 23 can be placed between every two adjacent tracks in advance, so that the first wheeled mobile device 2 can retract one optical signal transmission line 23 and place another optical signal transmission line 23 while traveling. Of course, before the first wheeled mobile device 2 runs, it is also possible not to place an optical signal transmission line 23 on the trackside, so that the first wheeled mobile device 2 only releases the line but does not retract it.

[0079] In practical applications, the distances between different stations may be different. The maximum value of the distance between adjacent stations on a certain track can be determined, and the length of the optical signal transmission line 23 can be set to be greater than or equal to the maximum value of the distance. For example, the maximum value of the distance between adjacent stations is 20 km. Taking into account the distance between the terminal post 113 and the wheeled mobile device 2, plus a margin, the length of the optical signal transmission line 23 can be set to 23 km, thereby saving the length of the optical signal transmission line 23 and reducing costs.

[0080] Next, the specific structures of the first control component 31 and the second control component 32 are described in detail.

[0081] like Figure 6 As shown, the first control assembly 31 includes a first disc tray assembly 33 , a second disc tray assembly 34 , a base 35 , a tension mechanism 36 , a positioning roller 38 , a tensioning roller 39 , a controller 310 and a detector 311 .

[0082] like Figure 7 As shown, the first tray assembly 33 includes a tray 331, a driving device 332, a ratchet 333 and a pawl ( Figure 7 not shown).

[0083] like Figure 8 As shown, the driving device 332 includes a fixing portion 3321, a driving portion 3322, and an induction coil ( Figure 8 (not shown in the figure). The fixing part 3321 is fixed on the axle 25, and the driving part 3322 is sleeved on the fixing part 3321. In this embodiment, the driving device 332 can be a motor, the fixing part 3321 can be a stator, and the driving part 3322 can be a rotor. When the motor is powered on, that is, when the induction coil is powered on, the driving part 3322 can rotate relative to the fixing part 3321. Since the fixing part 3321 is fixed on the axle 25, when the wheeled mobile equipment 2 is traveling, the axle 25 rotates, the fixing part 3321 rotates with the axle 25, and the rotation speed of the fixing part 3321 is the same as the rotation speed of the axle 25. When the driving part 3322 rotates relative to the fixing part 3321, the driving part 3322 can provide rotation speed compensation for the disc holder 331. Exemplarily, when the rotation direction of the driving part 3322 relative to the fixed part 3321 is the same as the rotation direction of the axle 25, the rotation speed of the driving part 3322 is the sum of the rotation speed of the axle 25 and the rotation speed of the driving part 3322 relative to the fixed part 3321, that is, the rotation speed of the driving part 3322 is greater than the rotation speed of the axle 25. When the rotation direction of the driving part 3322 relative to the fixed part 3321 is opposite to the rotation direction of the axle 25, the rotation speed of the driving part 3322 is the difference between the rotation speed of the axle 25 and the rotation speed of the driving part 3322 relative to the fixed part 3321.

[0084] like Fig. 9 As shown, the pawl 334 is fixed on the axle 25, and the ratchet 333 is sleeved and connected to the axle 25 through the pawl 334. The ratchet 333 is provided with two first mounting holes 3331, which are arranged in the vertical direction. Figure 8 The driving portion 3322 of the driving device 332 shown in the figure can be fixed on the ratchet 333 through the first mounting hole 3331. Figure 7 As shown, the driving device 332 is fixed to the side of the ratchet 333 close to the wheel 26. That is, one end of the axle 25 extends out of the wheel 26. The driving device 332, the ratchet 333 and the pawl 334 are all fixed to the part of the axle 25 extending out of the wheel 26, and are connected along the axial direction of the axle 25.

[0085] like Fig. 9 As shown, the pawl 334 is used to provide a force for the ratchet 333 to prevent the ratchet 333 from reversing relative to the wheel axle 25. For example, when the wheeled mobile device 2 is traveling, the wheel axle 25 always rotates in the direction in which the wheeled mobile device 2 is traveling. Figure 7 As shown, the ratchet 333 is fixed to the driving portion 3322 of the driving device 332. When the speed of the driving portion 3322 of the driving device 332 relative to the fixed portion 3321 is 0, the driving portion 3322 rotates at the same speed as the fixed portion 3321, and the ratchet 333 rotates at the same speed as the wheel axle 25. When the speed of the driving portion 3322 of the driving device 332 relative to the fixed portion 3321 is a positive value, that is, the rotation direction of the driving portion 3322 relative to the fixed portion 3321 is the same as the rotation direction of the wheel axle 25. When the rotation direction of the driving part 3322 of the driving device 332 is the same as that of the fixed part 3321, the rotation direction of the ratchet 333 is greater than the rotation direction of the axle 25, and the pawl 334 starts to slide; when the rotation direction of the driving part 3322 of the driving device 332 relative to the fixed part 3321 is negative, that is, the rotation direction of the driving part 3322 relative to the fixed part 3321 is opposite to the rotation direction of the axle 25, the rotation speed of the driving part 3322 gradually decreases and becomes the same as that of the fixed part 3321. Since the pawl 334 can prevent the ratchet 333 from reversing relative to the axle 25, the rotation speed of the driving part 3322 decreases to the same as that of the fixed part 3321 and cannot continue to decrease, thereby maintaining the rotation speed.

[0086] like Figure 7 As shown, the disc holder 331 is sleeved on the axle 25 and is fixedly connected to the driving part 3322 of the driving device 332 through the ratchet 333. In other words, the disc holder 331 can keep synchronous rotation with the driving part 3322. Synchronous rotation can mean that the rotation direction and speed are the same. The power source of the disc holder 331 mainly comes from the power output of the axle 25. Therefore, a low-power driving device 332 can be configured to meet the speed requirement of the disc holder 331, thereby reducing the cost of the driving device 332.

[0087] like Figure 7 As shown, the driving portion 3322, the ratchet 333 and the disc holder 331 are fixedly connected in sequence along the axial direction of the axle 25. For example, an extension portion is connected to the axle 25, and the extension portion is coaxially arranged with the axle 25. Parts of the driving portion 3322, the ratchet 333 and the disc holder 331 are fixed to the axle 25, and the remaining parts are fixed to the extension portion. Alternatively, the driving portion 3322, the ratchet 333 and the disc holder 331 are all fixed to the axle 25. The disc holder 331 is located at the end away from the wheel 26, so as to facilitate the release of the optical signal transmission line 23 wound on the disc holder 331 to the side of the track. For example, as Fig. 9 As shown, the ratchet 333 is further provided with two second mounting holes 3332, wherein the two second mounting holes 3332 can be arranged in the horizontal direction. Figure 7 The disc holder 331 shown can be fixed on the ratchet 333 through the second mounting hole 3332 .

[0088] like Fig.10 As shown, the disc tray 331 includes a first limiting plate 3311 and a second limiting plate 3312 that are arranged opposite to each other, and a body 3313 located between the first limiting plate 3311 and the second limiting plate 3312. The first limiting plate 3311 is in contact with and fixed to the ratchet 333, the second limiting plate 3312 is located on a side of the body 3313 away from the ratchet 333, and the second limiting plate 3312 is detachably connected to the body 3313. Figure 6 The optical signal transmission line 23 shown can be wound around the main body 3313, and the plate diameters of the first limiting plate 3311 and the second limiting plate 3312 can be larger than the diameter of the main body 3313, thereby limiting the optical signal transmission line 23 and preventing the optical signal transmission line 23 from falling from the main body 3313.

[0089] like Fig.10 As shown, the first tray assembly 33 further includes a slip ring 335 fixed inside the tray 331. The slip ring 335 may include a first sub-slip ring and a second sub-slip ring connected along the axial direction of the tray 331. The first sub-slip ring is fixed inside the tray 331, and the second sub-slip ring is fixed on the base 35. The first sub-slip ring can rotate relative to the second sub-slip ring. One end of the first sub-slip ring away from the second sub-slip ring is connected to the first sub-slip ring. Figure 6 The first end of the optical signal transmission line 23 is connected to the first end of the optical signal transmission line 23, and the first end of the optical signal transmission line 23 is fixed relative to the disc support 331. The end of the second sub-slip ring away from the first sub-slip ring is connected to the Figure 4In the vehicle-mounted communication device 21 shown, the second sub-slip ring is fixed relative to the vehicle-mounted communication device 21. In this way, the signal on the optical signal transmission line 23 can be transmitted to the vehicle-mounted communication device 21 through the first sub-slip ring, the second sub-slip ring and the optical cable, and the signal on the vehicle-mounted communication device 21 can also be transmitted to the optical signal transmission line 23 through the optical cable, the second sub-slip ring and the first sub-slip ring.

[0090] like Figure 6 As shown, the second tray assembly 34 has the same structure as the first tray assembly 33. Figure 7 As shown, the second tray assembly 34 also includes a tray 331, a driving device 332, a ratchet 333 and a pawl ( Figure 7 The connection relationship between the disc support 331, the driving device 332, the ratchet wheel 333, the ratchet pawl 334 and the wheel shaft 25 in the second disc support assembly 34 is the same as that of the first disc support assembly 33, and will not be repeated here. Figure 6 As shown, the first pan support assembly 33 is closer to the front of the vehicle than the second pan support assembly 34 .

[0091] The second pan support assembly 34 and the first pan support assembly 33 are located on the same side of the wheeled mobile device 2 and are respectively connected to different axles 25. Exemplarily, the first pan support assembly 33 and the second pan support assembly 34 are respectively connected to two adjacent axles 25. In this way, it is possible to reduce the possibility of the first pan support assembly 33 and the second pan support assembly 34 being connected to each other due to the presence of other axles. Figure 6 The optical signal transmission line 23 is shown wound around other axles.

[0092] like Figure 6 As shown, the optical signal transmission line 23 can be wound around the tray 331 of the first tray assembly 33, and the second end of the optical signal transmission line 23 extends from the tray 331 of the first tray assembly 33 and is wound around the tray 331 of the second tray assembly 34. Exemplarily, in this embodiment, as Figure 6 As shown, the optical signal transmission line 23 is half-wound around the tray 331 of the second tray assembly 34. In other embodiments, the optical signal transmission line 23 can be wound around the tray 331 of the second tray assembly 34 for 1.5 turns. When the tray 331 of the first tray assembly 33 and the tray 331 of the second tray assembly 34 rotate in the same direction, for example, along Figure 6 When the optical signal transmission line 23 is rotated clockwise as shown, it can be released from the tray 331 of the first tray assembly 33. The optical signal transmission line 23 can be an optical cable. When the first control assembly 31 further includes a second tray assembly 34, the first tray assembly 33 and the second tray assembly 34 can release the optical signal transmission line 23 together.

[0093] Since the disc tray 331 is fixed on the axle 25, the cross section of the disc tray 331 can be circular. In order to avoid the disc tray 331 from colliding with the track or objects beside the track, the diameter of the disc tray 331 is usually smaller than the diameter of the wheel 26. When the rotation speed of the disc tray 331 is greater than the rotation speed of the axle 25, the linear speed of the optical signal transmission line 23 released from the disc tray 331 can be consistent with the driving speed of the wheeled mobile device 2, so that the release speed of the optical signal transmission line 23 is consistent with the driving speed of the wheeled mobile device 2, avoiding the situation where the optical signal transmission line 23 is damaged due to the different speeds of the two, thereby affecting the signal transmission. Therefore, the embodiment of the present application can achieve reliable communication connection. In addition, the power source of the disc tray 331 mainly comes from the power output of the axle 25, so that a low-power drive device 332 can be configured to meet the rotation speed requirement of the disc tray 331, thereby reducing the cost of the drive device 332.

[0094] In addition, when the wheeled mobile device 2 stops, the disc tray 331 will continue to rotate at the original speed due to inertia, resulting in the pay-out speed or take-up speed of the optical signal transmission line 23 being different from the travel speed of the wheeled mobile device 2. At this time, the driving part 3322 of the driving device 332 needs to be reversed relative to the wheel shaft 25 to drive the rotation speed of the disc tray 331 to slow down. Fig. 9 The pawl 334 shown can provide a protection for the ratchet 333. Figure 7 The force of the tray 331 reversing relative to the axle 25 shown in the figure prevents the tray 331 from reversing relative to the axle 25, which would cause the pay-off speed of the optical signal transmission line 23 to be different from the driving speed of the mobile device 2, thereby causing the optical signal transmission line 23 to break.

[0095] In this embodiment, the signal transmission device 3 may include a plurality of positioning rollers 38. For example, Figure 6 As shown, the signal transmission device 3 includes two positioning rollers 38. Both positioning rollers 38 are located between the first tray assembly 33 and the second tray assembly 34. The positioning rollers 38 are rotatably connected to the base 35. One of the positioning rollers 38 is closer to the first tray assembly 33, and the other positioning roller 38 is closer to the second tray assembly 34. The optical signal transmission line 23 is half-wound around the outer surface of the rotating body of the two positioning rollers 38, that is, part of the optical signal transmission line 23 abuts against the outer surface of the rotating body of the positioning rollers 38. In this way, the positioning rollers 38 not only provide a positioning function for part of the optical signal transmission line 23, but also enable the optical signal transmission line 23 to be tightened.

[0096] like Figure 6As shown, the tension roller 39 is connected to the base 35 in a rotatable and movable manner. Exemplarily, the tension roller 39 can be connected to the base 35 via a spring. Moreover, it can be understood that the tension roller 39 may include a fixed body fixed to one end of the spring and a rotating body sleeved on the outer periphery of the fixed body. The tension roller 39 is located on the side of the second tray assembly 34 close to the first tray assembly 33, and the optical signal transmission line 23 is clamped between the tray 331 of the second tray assembly 34 and the rotating body of the tension roller 39. In this way, the tension roller 39 can provide pressure to the optical signal transmission line 23 in the axial direction of the tray 331, thereby providing friction to the optical signal transmission line 23, thereby, the optical signal transmission line 23 can be smoothly released under the action of the friction force, avoiding the situation where the optical signal transmission line 23 "slips".

[0097] like Figure 6 As shown, the tension mechanism 36 is connected to the base 35. The tension mechanism 36 includes a power assembly 361 and a tension roller 362, wherein the power assembly 361 is fixed on the base 35. The power assembly 361 includes a driving end, and the tension roller 362 is fixed to the driving end of the power assembly 361, and the tension roller 362 is located on the opposite side of the power assembly 361, and when the driving end of the power assembly 361 rotates or moves relative to the base 35, the tension roller 362 can be driven to swing or move.

[0098] like Figure 6 As shown, the power assembly 361 and the tension roller 362 are both located between the first tray assembly 33 and the second tray assembly 34. After the optical signal transmission line 23 is wound around and extended from the tray 331 of the first tray assembly 33, it is wound around one of the positioning rollers 38, the tension roller 362, another positioning roller 38 and the second tray assembly 34 in sequence, and the second end extends from the second tray assembly 34. In other words, part of the outer surface of the tension roller 362 abuts against the optical signal transmission line 23.

[0099] like Figure 6 As shown, the power assembly 361 can be electrically connected to the controller 310. After the optical signal transmission line 23 is wound around the tray 331 of the first tray assembly 33, one of the positioning rollers 38, the tension roller 362, another positioning roller 38 and the tray 331 of the second tray assembly 34, the optical signal transmission line 23 can be adjusted according to the preset tension value F of the optical signal transmission line 23. set , determine the initial position of the driving end of the power assembly 361, and adjust the driving end of the power assembly 361 to the initial position, then the tension roller 362 is also at its own initial position. The tension value F of the optical signal transmission line 23 at this time is the preset tension value F set The tension roller 362 provides a downward force for the optical signal transmission line 23, and the optical signal transmission line 23 also provides an upward reaction force for the tension roller 362, and the action force and the reaction force are balanced.

[0100] When the speed at which the first tray assembly 33 releases the optical signal transmission line 23 is different from the speed at which the second tray assembly 34 releases the optical signal transmission line 23, part of the optical signal transmission line 23 between the first tray assembly 33 and the second tray assembly 34 will become loose and accumulate or be torn.

[0101] Exemplarily, when the speed at which the second tray assembly 34 releases the optical signal transmission line 23 is greater than the speed at which the first tray assembly 33 releases the optical signal transmission line 23, the tension value F increases. The upward reaction force provided by the optical signal transmission line 23 to the tension roller 362 will increase and be greater than the downward force provided by the tension roller 362 to the optical signal transmission line 23. The tension roller 362 will move upward or rotate counterclockwise, thereby driving the driving end of the power assembly 361 to move upward or rotate counterclockwise. The position of the driving end of the power assembly 361 changes, and the position change of the driving end, such as the displacement or angular displacement, can be sent to the controller 310, and the controller 310 calculates the tension value F of the optical signal transmission line 23 at this time according to the position change. And according to the tension value F and the preset tension value F set The rotation speed of the driving part 3322 of the first tray assembly 33 is controlled so that the speed at which the first tray assembly 33 releases the optical signal transmission line 23 is the same as the speed at which the second tray assembly 34 releases the optical signal transmission line 23, and the tension value F of the optical signal transmission line 23 returns to the preset tension value F. set , the driving end of the power assembly 361 returns to its initial position, so that the tension roller 362 is also at its initial position.

[0102] When the speed at which the second disc tray assembly 34 releases the optical signal transmission line 23 is less than the speed at which the first disc tray assembly 33 releases the optical signal transmission line 23, the tension value F decreases. The upward reaction force provided by the optical signal transmission line 23 to the tension roller 362 will decrease and be less than the downward force provided by the tension roller 362 to the optical signal transmission line 23. The tension roller 362 will move downward or rotate clockwise, thereby driving the driving end of the power assembly 361 to move downward or rotate clockwise. The position of the driving end of the power assembly 361 changes, and the position change of the driving end, such as the displacement or angular displacement, can be sent to the controller 310, and the controller 310 calculates the tension value F of the optical signal transmission line 23 according to the position change. And according to the tension value F and the preset tension value F set The rotation speed of the driving part 3322 of the first tray assembly 33 is controlled so that the speed at which the first tray assembly 33 releases the optical signal transmission line 23 is the same as the speed at which the second tray assembly 34 releases the optical signal transmission line 23, and the tension value F of the optical signal transmission line 23 returns to the preset tension value F. set , the driving end of the power assembly 361 returns to its initial position, so that the tension roller 362 is also at its initial position.

[0103] Thus, when the optical signal transmission line 23 is loose and piled up or subjected to excessive tension, the controller 310 can adjust the tension value F according to the tension value F and the preset tension value F. set The difference between the first and second disc tray assemblies 33 is used to adjust the rotation speed of the first disc tray assembly 33, so that the speed at which the first disc tray assembly 33 releases the optical signal transmission line 23 is the same as the speed at which the second disc tray assembly 34 releases the optical signal transmission line 23. This reduces the situation where the optical signal transmission line 23 is loose and piled up, or is torn off.

[0104] like Figure 6 As shown, the detector 311 is fixed on the vehicle body 24, and the detection end of the detector 311 faces the optical signal transmission line 23 wound on the first tray assembly 33. During the driving process of the wheeled mobile device 2, the optical signal transmission line 23 is gradually released from the first tray assembly 33 and the second tray assembly 34, and the maximum diameter of the optical signal transmission line 23 wound on the first tray assembly 33 becomes smaller and smaller as it is released. Therefore, the detector 311 can detect the maximum diameter of the portion of the optical signal transmission line 23 wound on the first tray assembly 33. Exemplarily, the detector 311 can emit a detection laser to the optical signal transmission line 23, and the detection laser is reflected back after reaching the optical signal transmission line 23 and received by the detector 311. The detector 311 can calculate the maximum diameter according to the time between emitting the detection laser and receiving the laser. After obtaining the maximum diameter, the maximum diameter can be sent to the controller 310. It is convenient for the controller 310 to determine the rotation speed compensation of the driving device 332 according to parameters such as the maximum diameter.

[0105] In addition, the detector 311 can also measure the maximum diameter in real time and send the maximum diameter to the controller 310. The controller 310 can determine whether the optical signal transmission line 23 is broken according to the change of the maximum diameter. Specifically, when the maximum diameter does not change within a certain period of time, it can be determined that the optical signal transmission line 23 may be broken, and a warning signal can be sent to the station communication device 112.

[0106] like Fig.17 As shown, the second control assembly 32 may include a first tray assembly 33, a second tray assembly 34, a base 35, a tension mechanism 36, a positioning roller 38, a tension roller 39, a controller 310 and a detector 311. In this embodiment, the structures of the first tray assembly 33, the second tray assembly 34, the base 35, the tension mechanism 36, the positioning roller 38, the tension roller 39, the controller 310 and the detector 311 of the second control assembly 32 are respectively as follows: Figure 6The first control assembly 31 shown has the same structure as the first tray assembly 33, the second tray assembly 34, the base 35, the tension mechanism 36, the positioning roller 38, the tension roller 39, the controller 310 and the detector 311. The connection relationship and position relationship between the components in the second control assembly 32 are also the same as those in the first control assembly 31. No further description is given here.

[0107] The difference between the second control assembly 32 and the first control assembly 31 is that the second tray assembly 34 of the second control assembly 32 is closer to the front of the vehicle than the first tray assembly 33. Moreover, the winding direction of the optical signal transmission line 23 on the first tray assembly 33 of the first control assembly 31 is opposite to the winding direction of the optical signal transmission line 23 on the first tray assembly 33 of the second control assembly 32. That is, when the first tray assembly 33 of the first control assembly 31 rotates, the optical signal transmission line 23 is released from the first control assembly 31; when the first tray assembly 33 of the second control assembly 32 rotates, the optical signal transmission line 23 is wound on the first tray assembly 33.

[0108] In the process of installing the signal transmission device 3 on the wheeled mobile device 2, Figure 6 The first tray assembly 33 and the second tray assembly 34 are respectively mounted on different axles 25, and the Fig.17 The first tray assembly 33 and the second tray assembly 34 are respectively mounted on different axles 25. Figure 7 As shown in FIG. 1 , the disc holder 331, the driving device 332 and the ratchet wheel 333 of the first control assembly 31 and the second control assembly 32 are all installed on the wheel shaft 25. Figure 6 The base 35 shown is mounted on the vehicle body 24, and the Fig.17 The base 35 shown is mounted on the vehicle body 24. Figure 4 As shown, the first control component 31 is installed near the rear of the wheeled mobile device 2, and the second control component 32 is installed near the front of the wheeled mobile device 2.

[0109] When the wheeled mobile device 2 arrives at the station m, the first control component 31 Figure 7 The second stop plate 3312 is removed from the body 3313, and the reel-shaped optical signal transmission line 23 is installed on the body 3313, and the first end of the optical signal transmission line 23 is fixedly connected to the slip ring 335 of the first tray assembly 33. The second stop plate 3312 is installed on the body 3313, thereby facilitating the installation of the reel-shaped optical signal transmission line 23 on the axle 25. The second end of the optical signal transmission line 23 is pulled out from the tray 331 of the first tray assembly 33, and the reel-shaped optical signal transmission line 23 is fixedly connected to the slip ring 335 of the first tray assembly 33. Figure 6As shown, the optical signal transmission line 23 is half-wound around one of the positioning rollers 38, the tension roller 362, the other positioning roller 38 and the tray 331 of the second tray assembly 34, and extends out of the tray 331 of the second tray assembly 34. The second end of the optical signal transmission line 23 is connected to Figure 4 The terminal post 113 of the station m shown. Figure 4 The vehicle-mounted communication device 21 shown can be connected to the connection post 113 via the optical signal transmission line 23, thereby realizing the communication connection between the vehicle-mounted communication device 21 and the station communication device 112 of the station m.

[0110] Assuming that an optical signal transmission line 23 has been placed on the trackside between station m and station m+1, the first end of the optical signal transmission line 23 placed on the trackside can be passed between the second tray assembly 34 and the tension roller 39, half-wound around one of the positioning rollers 38, the tension roller 362, the other positioning roller 38, and wound around the first tray assembly 33 for 1-2 turns, and then the first end of the optical signal transmission line 23 is fixed on the slip ring 335 of the second control assembly 32. Since the second end of the optical signal transmission line 23 is connected to the terminal post 113 of station m+1, the communication connection between the vehicle-mounted communication device 21 and the station communication device 112 of station m+1 can also be realized.

[0111] When the wheeled mobile equipment 2 is traveling, the first control component 31 and the second control component 32 are: Figure 6 The controller 310 shown can control Figure 7 The driving portion 3322 of the driving device 332 of the first disc tray assembly 33 is shown to rotate, thereby rotating along with the wheel shaft 25 and providing rotation speed compensation for the disc tray 331 of the first disc tray assembly 33 . Figure 6 The controller 310 shown can also control Figure 7 The driving part 3322 of the driving device 332 of the second tray assembly 34 is shown to rotate, so that while rotating with the axle 25, it can also provide speed compensation for the tray 331 of the second tray assembly 34. When the first tray assembly 33 and the second tray assembly 34 of the first control assembly 31 rotate in the same direction with the axle 25, the optical signal transmission line 23 is gradually released and placed beside the track. When the first tray assembly 33 and the second tray assembly 34 of the second control assembly 32 rotate in the same direction with the axle 25, the optical signal transmission line 23 pre-placed beside the track is gradually wound until the wheeled mobile equipment 2 reaches the station m+1.

[0112] The first end of the optical signal transmission line 23 connected to the first control component 31 is removed from the first tray component 33 and connected to the terminal post 113 of the station m+1. Next, the optical signal transmission line 23 in the form of a reel wound on the second control component 32 is removed from the second control component 32 and installed on the first control component 31, and the first end of the optical signal transmission line 23 pre-placed between the station m+1 and the station m+2 is connected to the second control component 32. In this way, the wheeled mobile device 2 can communicate with the station m+1 and the station m+2 respectively.

[0113] When the wheeled mobile device 2 is traveling on the track, the speed at which the optical signal transmission line 23 is released from the first control assembly 31 needs to be consistent with the travel speed of the wheeled mobile device 2, thereby avoiding the situation where the optical signal transmission line 23 is broken or the optical signal transmission line 23 is loose and piled up due to the inconsistent speed of the two, which is not conducive to release. Therefore, it is necessary to control the rotation speed of the first tray assembly 33 and the second tray assembly 34.

[0114] For example, Fig.11 The control method shown controls the rotation speed of the second tray assembly 34, and Fig.12 The control method shown controls the rotation speed of the first disc tray assembly 33 . Fig.11 and Fig.12 The control method shown may be applied to the controller 310 .

[0115] It can be understood that the speed control method for the second disc tray assembly 34 of the first control assembly 31 is the same as the speed control method for the second disc tray assembly 34 of the second control assembly 32. The speed control method for the second disc tray assembly 34 of the first control assembly 31 is taken as an example for explanation here.

[0116] like Fig.11 As shown, the control method includes:

[0117] S41, measuring the rotation speed ω of the wheel.

[0118] The tread diameter of the wheel 26 can be set in advance. wh , the diameter of the tray 331 of the second tray assembly 34 is Φ fr1 (like Figure 7 As shown) is input to the controller 310. Fig.13 As shown, the tread of the wheel 26 may refer to the surface of the wheel 26 that contacts the top surface of the rail. The tread diameter of the wheel 26 is Φ wh It can refer to the diameter of the surface of the wheel 26 that contacts the top surface of the track. For a wheeled mobile device 2 that uses rubber wheels and travels on a road, the tread of the wheel 26 can refer to the surface of the wheel 26 that contacts the ground. The tread diameter of the wheel 26 is Φ whIt may refer to the diameter of the surface of the wheel 26 that contacts the ground.

[0119] After the wheeled mobile device 2 is started, the rotation speed ω of the wheel 26 can be measured in real time, with the unit being rad / s (radians per second).

[0120] S42, determining whether the wheel rotation speed ω is 0.

[0121] After the rotation speed ω of the wheel 26 is measured, it can be determined whether the rotation speed ω of the wheel 26 is 0.

[0122] S43, if the wheel speed ω is not 0, calculate the first speed ω according to the diameter of the second tray assembly, the wheel speed ω and the wheel tread diameter mo1 .

[0123] If the rotation speed ω of the wheel 26 is not 0, it indicates that the wheeled mobile equipment 2 is moving. Figure 7 As shown, since the disc holder 331 is fixed to the axle 25 by the ratchet 333, the cross section of the disc holder 331 can be circular. The diameter of the second disc holder assembly 34 can refer to the diameter Φ of the winding surface of the disc holder 331 of the second disc holder assembly 34. fr1 In order to prevent the disc tray 331 from colliding with the track or trackside objects, the diameter of the winding surface of the disc tray 331 of the second disc tray assembly 34 is Φ fr1 Typically smaller than the tread diameter Φ of the wheel 26 wh It can be understood that when the disc tray 331 of the second disc tray assembly 34 has the same structure as the disc tray 331 of the first disc tray assembly 33 , the winding surface of the disc tray 331 is the circumferential surface of the body 3313 .

[0124] The travel speed V1 of the wheeled mobile device 2 can be calculated according to the following expression: V1 = ω × Φ wh / 2, where ω represents the rotation speed of the wheel 26, Φ wh represents the tread diameter of the wheel 26. For example, assuming that the tread diameter of the wheel 26 is Φ wh is 1200mm, ω is 10×2πrad / s. According to the calculation formula of driving speed V1, we can get: V1=ω×Φ wh / 2=135716 m / h, that is, the travel speed of the wheeled mobile equipment 2 is 135.716 kilometers per hour.

[0125] Since the diameter Φ of the winding surface of the disc tray 331 fr1 Smaller than the wheel tread diameter Φ whDuring the driving of the wheeled mobile device 2, in order to ensure that the pay-off speed of the optical signal transmission line 23 is synchronized with the driving speed of the wheeled mobile device 2, the driving device 332 is required to perform positive compensation on the disc tray 331 so that the rotation speed of the disc tray 331 is greater than the rotation speed of the wheel 26.

[0126] The first speed ω mo1 is the rotation speed of the driving part 3322 of the driving device 332 relative to the fixing part 3321. The first rotation speed ω mo1 The calculation formula can be determined through the following process:

[0127] The pay-off speed V2 of the tray 331 needs to be the same as the travel speed V1 of the wheeled mobile device 2, that is, V1 = V2. The calculation formula for the pay-off speed V2 of the tray 331 is: V2 = (ω + ω mo1 )×Φ fr1 / 2.

[0128] Combining the calculation formula of the travel speed V1, the calculation formula of the pay-off speed V2 and the formula V1=V2, the first rotation speed ω can be obtained. mo1 The calculation formula is: mo1 =ω×(Φ wh / Φ fr1 =1). Therefore, the first rotation speed ω can be calculated according to the diameter of the second tray assembly 34, the rotation speed of the axle 25 and the tread diameter of the wheel 26. mo1 .

[0129] S44, controlling the driving device to rotate in a first direction and at a first speed.

[0130] The first direction may be the same as the rotation direction of the wheel axle 25. In this way, the driving device 332 can provide positive compensation for the second pan support assembly 34, so that the rotation speed of the second pan support assembly 34 is greater than the rotation speed ω of the wheel 26, so that the pay-off speed V2 is the same as the travel speed V1 of the wheeled mobile equipment 2. Moreover, the first rotation speed ω calculated based on the diameter of the second pan support assembly 34, the rotation speed of the wheel 26, and the tread diameter of the wheel 26 is mo1 After the driving part 3322 of the driving device 332 is controlled to rotate in the first direction and at the first speed, step S41 may be executed.

[0131] S45: If the rotation speed ω of the wheel is 0, the rotation speed of the driving part of the driving device relative to the fixed part is measured.

[0132] If the rotation speed ω of the wheel 26 is 0, it indicates that the wheel 26 is currently in a non-rotating state, that is, the wheeled mobile device 2 is in a parking state or a sliding state. The sliding state may refer to that during the movement of the wheeled mobile device 2, the friction between the wheel 26 and the track is less than the braking friction of the wheeled mobile device 2, and the wheeled mobile device 2 is displaced.

[0133] S46, determining whether the rotation speed of the driving part of the driving device relative to the fixed part is 0.

[0134] After measuring the rotation speed of the driving portion 3322 of the driving device 332 relative to the fixed portion 3321 , it can be determined whether it is zero.

[0135] If the rotation speed of the driving part 3322 of the driving device 332 relative to the fixed part 3321 is 0, step S41 is executed. When the rotation speed of the driving part 3322 of the driving device 332 relative to the fixed part 3321 is 0, it indicates that the driving part 3322 is stationary relative to the fixed part 3321, and the driving part 3322 does not compensate the rotation speed of the disc holder 331, that is, the rotation speed of the disc holder 331 is the same as the rotation speed of the wheel 26. Alternatively, when the wheeled mobile device 2 needs to brake suddenly, the wheel 26 is locked, and the disc holder 331 will continue to rotate under the action of inertia. The driving device 332 performs reverse compensation on the disc holder 331, but due to the force of the ratchet 334, there is only reverse torque without reverse rotation. At this time, the rotation speed of the driving part 3322 of the driving device 332 relative to the fixed part 3321 is also 0.

[0136] If the rotation speed of the driving part 3322 of the driving device 332 relative to the fixing part 3321 is not 0, then S47 is executed to control the driving part 3322 of the driving device 332 to rotate in the second direction, and step S41 is executed.

[0137] The second direction may be opposite to the rotation direction of the axle 25. When the rotation speed of the driving part 3322 of the driving device 332 relative to the fixed part 3321 is not 0, it indicates that the driving part 3322 is rotating relative to the fixed part 3321. At this time, the driving part 3322 of the control device 332 needs to be rotated in the direction opposite to the rotation speed of the axle 25, so that the disc holder 331 is stationary relative to the axle 25.

[0138] It is understandable that the above steps S41-S47 can be applied to the wheeled mobile device 2 running on the track. Usually, the wheeled mobile device 2 running on the track is provided with an electronic anti-skid device. When the electronic anti-skid device detects that the wheeled mobile device 2 is sliding, it can reduce the braking force to avoid sliding. Therefore, there is no need to consider sliding. However, for the wheeled mobile device 2 using rubber tires and running on the road, the sliding situation can be considered. When the control method is applied to the wheeled mobile device 2 in this case, since the rotation speed ω of its wheel 26 is 0, the first rotation speed ω is calculated. mo1 Methods and Fig.11 For example, a speed sensor may be provided in the wheeled mobile device 2, and the speed sensor may be used to measure the travel speed V1 of the wheeled mobile device 2. The calculation formula based on the travel speed V1 measured by the speed sensor and the pay-off speed V2 of the tray 331 is: V2 = (ω + ω mo1 )×Φ fr1 / 2 and the formula V1=V2, calculate the rotation speed ω of the driving part 3322 relative to the fixed part 3321 mo1 , that is, the first speed.

[0139] According to Fig.12 The control method shown controls the rotation speed of the first tray assembly 33. Fig.11 The difference between the control methods shown is that the tension value of the optical signal transmission line 23 is taken into account during the control process. The speed control method of the first tray assembly 33 of the first control assembly 31 is the same as the speed control method of the first tray assembly 33 of the second control assembly 32. Here, the speed control method of the first tray assembly 33 of the first control assembly 31 is taken as an example for description. Fig.12 As shown, the control method includes:

[0140] S51, measuring the rotation speed ω of the wheel.

[0141] Reference Fig.11 Step S41 is shown.

[0142] S52, determining whether the wheel rotation speed ω is 0.

[0143] Reference Fig.11 Step S42 is shown.

[0144] If the wheel speed ω is not 0, then S53 is executed to determine the maximum diameter Φ detected by the detector. fr2 , the wheel speed ω and the wheel tread diameter Φ wh , calculate the second speed ω mo2 .

[0145] and Fig.11In the embodiment shown, the rotation speed ω of the driving part 3322 relative to the fixed part 3321 is mo1 The derivation process of the calculation formula is the same, and the second speed ω can be obtained mo2 The calculation formula is: mo2 =ω×(Φ wh / Φ fr2 –1).

[0146] The detector 311 can be used as the initial compensation of the speed supplementary drive device 332. When the wheeled mobile device 2 is started, the closed-loop control of the tension value is switched to compensate the release of the disc tray 331. Since the distance between each two stations may be different, the initial winding diameter of the optical signal transmission line 23 is also different, and the initial speed compensation is different. In this way, the controller 310 calculates the second speed ω according to the maximum diameter detected by the detector 311, the speed of the wheel 26, and the tread diameter of the wheel 26. mo2 , which enables the second speed ω mo2 The calculation is more accurate.

[0147] S54, controlling the driving unit of the driving device to rotate in a first direction and a second speed ω mo2 Rotate.

[0148] The first direction is the same as the rotation direction of the axle 25. In this way, the rotation speed of the driving unit 3322 can be determined according to the maximum diameter of the optical signal transmission line 23 actually wound on the tray 331, thereby making the unwinding speed V2 of the optical signal transmission line 23 from the tray 331 the same as the driving speed V1 of the wheeled mobile device 2.

[0149] S55, obtaining a tension value F. The position change amount sent by the tension component 36 may be received, and the tension value F may be calculated according to the position change amount.

[0150] S56, according to the tension value F and the preset tension value F set , adjust the second speed to obtain the third speed.

[0151] As the wheeled mobile device 2 is traveling, the optical signal transmission line 23 is continuously released, and the optical signal transmission line 23 wound on the first tray assembly 33 becomes less and less, the maximum diameter becomes smaller and smaller, and the corresponding pay-off speed V2 becomes smaller and smaller. When the speed at which the first tray assembly 33 releases the optical signal transmission line 23 is different from the speed at which the second tray assembly 34 releases the optical signal transmission line 23, the optical signal transmission line 23 will be relaxed or tightened, and thus the tension value F of the optical signal transmission line 23 will be different. Moreover, the rotation speed ω mo2 The change value of the actual measured tension value F and the preset tension value F setBased on this, the tension value F of the optical signal transmission line 23 detected by the tension mechanism 36 can be obtained and compared with the preset tension value F set By comparing the tension value F and the preset tension value F set The difference between the values ​​of F and F is adjusted to adjust the rotation speed of the driving part 3322 of the driving device 332 so that the tension value F is close to the preset tension value F. set , thereby ensuring that the speed at which the tray 331 of the first tray assembly 33 releases the optical signal transmission line 23 and the speed at which the tray 331 of the second tray assembly 34 releases the optical signal transmission line 23 are as close as possible. It can be understood that the preset tension value F set It can be a predetermined theoretical tension value, and also the initial tension value.

[0152] Specifically, the second speed ω can be adjusted by using the proportional integral derivative (PID) method. mo2 .like Fig.14 As shown, the preset tension value F set After receiving the tension value F of the optical signal transmission line 23, the tension value F and the preset tension value F can be calculated first. set The difference ERROR between them is then proportionally regulated, integrally regulated and differentially regulated, or the adjusted difference is adjusted; the second speed ω is adjusted according to the adjusted difference mo2 Compensation is performed to obtain the third speed, thereby avoiding the jitters that occur when releasing the line.

[0153] S57, controlling the driving device of the first disc tray assembly to rotate at a third speed.

[0154] The rotation direction of the driving part 3322 of the driving device 332 relative to the fixed part 3321 is the same as the rotation direction of the wheel axle 25. In this way, the driving device 332 can provide positive compensation for the second disc support assembly 34, so that the rotation speed of the second disc support assembly 34 is greater than the rotation speed ω of the wheel 26, so that the take-up speed is the same as the driving speed V1 of the equipment during wheeled movement.

[0155] Moreover, after the rotation speed of the tray 331 is positively compensated, the rotation speed of the tray 331 is greater than the rotation speed of the wheel 26, and the line speed of the optical signal transmission line 23 wound on the tray 331 can be consistent with the driving speed V1 of the wheeled mobile device 2, so that the winding speed of the optical signal transmission line 23 is consistent with the driving speed V1 of the wheeled mobile device 2, avoiding the situation where the optical signal transmission line 23 is damaged due to the different speeds of the two, thereby affecting the signal transmission. Therefore, the embodiment of the present application can achieve reliable communication connection.

[0156] Continue to execute steps S51 and S52. If the rotation speed ω of the wheel is 0, then execute S58 to measure the rotation speed ω of the driving part of the driving device relative to the fixed part. mo1 . Reference Fig.11 If the rotation speed ω of the wheel is not 0, then step S55 is executed to obtain the tension value F.

[0157] S59, determining the rotation speed ω of the driving part of the driving device relative to the fixed part mo1 Whether it is 0.

[0158] Reference Fig.11 Step S46 is shown.

[0159] If the rotation speed ω of the driving part 3322 of the driving device 332 relative to the fixed part 3321 mo1 If it is 0, execute step S51.

[0160] If the rotation speed ω of the driving part 3322 of the driving device 332 relative to the fixed part 3321 mo1 If it is not 0, then execute S510 to control the driving device of the second tray assembly to rotate in the second direction. Then execute step S51. Fig.11 Step S47 is shown.

[0161] like Fig.15 As shown, the wheeled mobile device 2 further includes a signal detection device 27. The signal detection device 27 is fixed in the vehicle body 24. The signal detection device 27 and Figure 4 The in-vehicle communication device 21 is shown to be communicatively connected.

[0162] The optical signal transmission line 23 includes a plurality of sub-optical signal transmission lines 231, for example, Fig.16 As shown, the optical signal transmission line 23 may include two sub-optical signal transmission lines 231, namely a first sub-optical signal transmission line 2311 and a second sub-optical signal transmission line 2312. The first sub-optical signal transmission line 2311 and the second sub-optical signal transmission line 2312 may both be optical fibers. It is understood that the optical signal transmission line 23 may also include a filler including the first sub-optical signal transmission line 2311 and the second sub-optical signal transmission line 2312 and a sheath wrapped around the outside of the filler.

[0163] The first end of the first sub-optical signal transmission line 2311 is connected to the signal detection device 27 through the tray 331 for vibration detection. The first end of the second sub-optical signal transmission line 2312 is connected to the signal detection device 27 through the tray 331 for vibration detection. Figure 4 The vehicle-mounted communication device 21 shown is used for communication connection.

[0164] like Fig.15As shown, when the wheeled mobile device 2 is traveling on the track, the signal detection device 27 sends a first optical signal to the first sub-optical signal transmission line 2311. The first optical signal is transmitted on the first sub-optical signal transmission line 2311. If the foreign object 115 falls onto the optical signal transmission line 23 beside the track, the first sub-optical signal transmission line 2311 will be subjected to impact force. After being subjected to the impact force, the first sub-optical signal transmission line 2311 may send a second optical signal to the signal detection device 27. The second optical signal may be a Rayleigh scattering signal. The signal detection device 27 may receive the second optical signal and determine the location where the foreign object 115 appears based on the difference between the time when the first optical signal is sent and the time when the second optical signal is received. The type of foreign object 115 may also be identified through the signal model, such as a mudslide, etc. And the location where the foreign object 115 appears and the type of foreign object 115 are sent to Figure 4 The vehicle-mounted communication device 21 is shown, and is sent to the control center 15 by the vehicle-mounted communication device 21, so that the staff can conduct timely maintenance.

[0165] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A signal transmission device, characterized in that: Used to be installed on a wheeled mobile device, the wheeled mobile device includes a wheel axle, and the signal transmission device includes: A control component, wherein the control component includes a first disc tray component, the first disc tray component includes a disc tray and a driving device, the driving device includes a fixing portion and a driving portion, the fixing portion is used to be fixed on the wheel axle, the driving portion is fixed on the disc tray, and the disc tray is used to fix the first end of the optical signal transmission line and wind the optical signal transmission line or release the optical signal transmission line when rotating.

2. The signal transmission device according to claim 1, characterized in that: The fixing part is used for being sleeved and fixed on the wheel axle, the driving part is sleeved on the fixing part, and the disc holder is connected to the driving part along the axial direction of the driving part.

3. The signal transmission device according to claim 1 or 2, characterized in that: The disc tray includes a first limiting plate and a second limiting plate which are arranged opposite to each other and a body located between the first limiting plate and the second limiting plate. The first limiting plate is fixed to the driving part, and the second limiting plate is detachably connected to the body.

4. The signal transmission device according to any one of claims 1 to 3, characterized in that: The first disc tray assembly further comprises a ratchet and a pawl, wherein the pawl is used to be fixed on the wheel shaft, the ratchet is sleeved and connected to the wheel shaft through the pawl, and the driving part is fixedly connected to the disc tray through the ratchet; The pawl is used to provide a force to the ratchet wheel to prevent the disc tray from reversing relative to the wheel axle.

5. The signal transmission device according to claim 3 or 4, characterized in that: The control assembly further includes a second tray assembly, which is used to wind the optical signal transmission line extending from the first tray assembly, and a second end of the optical signal transmission line extends out of the second tray assembly.

6. The signal transmission device according to claim 5, characterized in that: The second pan tray assembly has the same structure as the first pan tray assembly.

7. The signal transmission device according to claim 5 or 6, characterized in that: The control component also includes a tension mechanism and a base, wherein the tension mechanism is connected to the base and is located between the first disc tray assembly and the second disc tray assembly, and a portion of the outer surface of the tension mechanism is used to abut against the optical signal transmission line and detect the tension value of the optical signal transmission line.

8. The signal transmission device according to claim 7, characterized in that: The control assembly further comprises a positioning roller connected to the base, the positioning roller is located between the first disc tray assembly and the second disc tray assembly, and the outer surface of the positioning roller is used to abut against the optical signal transmission line.

9. The signal transmission device according to claim 8, characterized in that: The number of the positioning rollers is at least two, and the first positioning roller of the at least two positioning rollers is closer to the second pan tray assembly, and the second positioning roller is closer to the first pan tray assembly.

10. The signal transmission device according to any one of claims 7 to 9, characterized in that: The control assembly further comprises a tensioning roller connected to the base, the tensioning roller being located on a side of the second tray assembly close to the first tray assembly, and the optical signal transmission line being clamped between the second tray assembly and the tensioning roller.

11. The signal transmission device according to any one of claims 3 to 10, characterized in that: The control component also includes a controller, which is electrically connected to the drive device. The controller is used to control the drive unit of the drive device to rotate in a first direction when the wheeled mobile equipment is traveling. The first direction is the same as the rotation direction of the wheel axle.

12. The signal transmission device according to any one of claims 5 to 7, 8 or 9, characterized in that: The wheeled mobile device further comprises a wheel fixed on the wheel axle; The controller is specifically used to: calculate a first rotation speed according to the diameter of the second disc support assembly, the rotation speed of the wheel and the tread diameter of the wheel, wherein the tread diameter is the diameter of the surface of the wheel in contact with the load-bearing surface; The driving device of the second disc tray assembly is controlled to rotate according to the first rotation speed.

13. The signal transmission device according to any one of claims 3 to 12, characterized in that: The controller is further used to control the driving part of the driving device to rotate in a second direction when the wheeled mobile equipment stops, and the second direction is opposite to the rotation direction of the wheel axle.

14. The signal transmission device according to any one of claims 3 to 13, characterized in that: The control assembly further comprises a detector, the detection end of the detector faces the optical signal transmission line wound on the first tray assembly, and the detector is used to detect the maximum diameter of the optical signal transmission line portion wound on the first tray assembly; The controller is also used for: Calculating a second rotational speed according to the maximum diameter detected by the detector, the rotational speed of the wheel, and the tread diameter of the wheel; The driving device of the first disc tray assembly is controlled to rotate at the second speed.

15. The signal transmission device according to claim 14, characterized in that: The control component further comprises a tension mechanism, which is electrically connected to the controller and is used to detect the tension value of the optical signal transmission line and send the tension value to the controller; The controller is further configured to: According to the tension value and the preset tension value, adjusting the second speed to obtain a third speed; The driving device of the first disc tray assembly is controlled to rotate at the third rotation speed.

16. The signal transmission device according to any one of claims 1 to 15, characterized in that: The signal transmission device comprises at least two control components, and at least two control components are respectively used to wind different optical signal transmission lines, and the second end of each optical signal transmission line is respectively used to connect to station communication equipment of different stations; When the wheeled mobile device moves, the optical signal transmission line on the first control component of at least two control components is released from the first tray component, and the optical signal transmission line of the second control component is wound around the first tray component.

17. A wheeled mobile device, characterized in that: It comprises a vehicle body, an axle and the signal transmission device according to any one of claims 1 to 16, wherein the axle is rotatably connected to the vehicle body, and the first disc support component of the signal transmission device is connected to the axle or the vehicle body.

18. The wheeled mobile device according to claim 17, characterized in that: The signal transmission device further comprises a second disc support assembly, wherein the first disc support assembly and the second disc support assembly are respectively connected to different axles.

19. The wheeled mobile device according to claim 17 or 18, characterized in that: The wheeled mobile device also includes a signal detection device and an optical signal transmission line; The optical signal transmission line includes multiple sub-optical signal transmission lines, and the first end of the first sub-optical signal transmission line among the multiple sub-optical signal transmission lines is connected to the vehicle-mounted communication equipment in the wheeled equipment through the signal detection device. The first sub-optical signal transmission line is used to receive a first optical signal sent by the signal detection device, and when subjected to an impact force, sends a second optical signal to the signal detection device, so that the signal detection device determines the location where the impact force occurs based on the second optical signal.

20. A vehicle-to-ground communication system, characterized in that: It comprises station communication equipment, on-board communication equipment, an optical signal transmission line and the signal transmission device according to any one of claims 1 to 16, wherein the first end of the optical signal transmission line is connected to the signal transmission device, the second end of the optical signal transmission line is connected to the station communication equipment, and the signal transmission device is communicatively connected to the on-board communication equipment.

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