A method and system for monitoring the climbing and adhesion force of a switch rail and an outside locking device

Abstract

The present application belongs to the field of rail transit technology, and discloses a method and system for monitoring the creeping and close adhesion of a switch rail and an external locking device, wherein the method comprises: when the relative displacement of the switch rail connecting iron and the connecting iron seat occurs, the magnetic field induction sensor converts the number of magnetic gates and the magnetic pickup sequence of the magnetic field induction sensor passing through the magnetic grating into a magnetic signal; when the connecting iron seat is pushed by the locking hook assembly, the optical fiber pin sensor converts the force received by the optical fiber pin sensor into an optical fiber signal; the magnetic signal is processed to obtain the creeping amount of the switch rail and the external locking device; and the optical fiber signal is processed to obtain the close adhesion of the switch. The sensing unit is installed on the existing external locking device, and there is no need to punch holes in the track bed and the track, and other instruments and sensing devices are installed, so that the method is simple to install and simple to construct. The present application realizes the simultaneous monitoring of the creeping amount and the close adhesion of the switch rail and the external locking device.

Description

Technical Field

[0001] This invention belongs to the field of rail transit technology, and specifically relates to a method and system for monitoring the creep and contact force of turnout switch rails and external locking devices. Background Technology

[0002] A turnout is a track device used when locomotives and rolling stock switch from one track to another. It is an essential track device for enabling trains to switch tracks or cross tracks. It is also a weak link in train operation equipment. It is characterized by complex structure, large load, short service life and large investment in maintenance and repair, and has become one of the key technologies that limit the speed of train operation.

[0003] "Close fit of switch rails" refers to the situation where, under normal operating conditions, the switch rail 102 in the direction of travel is tightly fitted to the inner side of the stock rail 101, i.e., the turnout is tightly fitted. Figure 1 As shown, a turnout includes a stock rail 101, a switch rail 102, a wing rail 103, and a frog rail 104. After the switch rail 102 and stock rail 101 are locked, the switch rail 102 is in close contact with the stock rail 101. At this time, the pressure of the switch rail 102 on the stock rail 101 is the switch rail contact force. Ideally, the cross-section of the switch rail 102 and the contact surface of the stock rail 101 are perfectly matched, and the switch rail 102 and the stock rail 101 are just in contact without generating pressure. However, in actual operation, the contact surfaces of the switch rail 102 and the stock rail 101 cannot achieve a perfect match, and after the turnout has been in operation for a long time, the rails may deform due to the roadbed or other reasons. In order to ensure that the switch rail and the stock rail can be completely in contact, the switch rail 102 must be in close contact with the stock rail 101 with a certain pressure. The switch rail contact force should be within a certain range; too large a force is detrimental to the track bed and switching equipment, while too small a force is detrimental to safety.

[0004] Switch rail creep refers to the longitudinal displacement of the switch rail 102 relative to the stock rail 101. The switch rail 102 and stock rail 101 expand and contract under different temperature conditions, resulting in a creeping effect where the switch rail 102 extends and contracts relative to the stock rail 101. When the creep of the switch rail 102 is severe, the external locking device connected to it will also shift with the switch rail 102, affecting the normal operation of the external locking device and even causing switch switching failures. Excessive creep of the switch rail 102 can easily lead to switch indication errors and switch jamming. Excessive creep of the external locking device can cause the switch switching equipment to jam, preventing the switch rail 102 from being switched into position, both of which will affect train operation.

[0005] Poor turnout fit can lead to train instability, and in severe cases, derailment, causing significant economic losses and personal injury, and affecting railway operational safety. Therefore, real-time monitoring of the creep of switch rail 102 and the external locking mechanism, as well as the turnout fit status, is of great significance.

[0006] In the existing technical solutions, patent application CN110160679A discloses a method and system for detecting the contact force of railway turnouts. The contact force sensor is installed between the closing iron and the locking frame. It discloses a method for detecting the contact force, but it cannot achieve real-time monitoring of the contact force.

[0007] In the existing technical solutions, patent application CN209945601U discloses an adjustable gap contact force sensor, which is installed between the switch rail and the base rail, and cannot meet the requirements of long-term on-site monitoring environment.

[0008] Among the existing technical solutions, patent application CN113136752A discloses a calibration device and method for measuring the crawling and tightness gap of a switch rail. It discloses a tightness force detection device, which requires drilling holes in the rail and installing the device next to the rail. Its structure is complex, installation is cumbersome, and it is greatly affected by outdoor environmental interference, which cannot meet the requirements for long-term on-site monitoring.

[0009] In summary, existing technologies cannot simultaneously detect the data relationship between the creep of the switch rail and the external locking device and the turnout contact force. Furthermore, all of them require the installation of relevant sensing units beside the switch rail and the main rail, which is complex and has poor stability in long-term field use. Summary of the Invention

[0010] To address the above problems, this invention provides a method and system for monitoring the creep and contact force of turnout switch rails and external locking devices, employing the following technical solution:

[0011] A method for monitoring the creep and contact force of a turnout switch rail and external locking device includes the following steps:

[0012] When the switch rail connecting iron and the connecting iron base undergo relative displacement, the magnetic field induction sensor converts the number of magnetic grids it passes through on the magnetic grid ruler and the magnetic pickup sequence into a magnetic signal; wherein, the magnetic grid ruler is set on the switch rail connecting iron, and the magnetic field induction sensor is set on the connecting iron base.

[0013] When the locking hook assembly pushes the connecting iron base, the fiber optic pin sensor converts the force it receives into a fiber optic signal; the fiber optic pin sensor is installed in the pin hole on the connecting iron base, and the locking hook assembly is connected to the connecting iron base through the fiber optic pin sensor.

[0014] The magnetic signal is processed to obtain the creep amount of the switch rail and the external locking device;

[0015] The optical fiber signal is processed to obtain the turnout contact force.

[0016] Furthermore, the magnetic signal is processed to obtain the creep amount of the switch rail and the external locking device, as follows:

[0017] The magnetic signal from the magnetic field sensor is converted into a first digital electrical signal. The first digital electrical signal is processed to obtain the crawling distance and crawling direction information of the switch rail and the external locking device.

[0018] Furthermore, the fiber optic signal is processed to obtain the turnout contact force as follows:

[0019] The optical fiber signal from the optical fiber pin sensor is converted into a second digital electrical signal, and the second digital electrical signal is processed to obtain the turnout contact force.

[0020] Furthermore, it also includes the following steps:

[0021] Based on the obtained creep amount of the switch rail and external locking device, and the obtained turnout contact force, the data relationship between the creep amount of the switch rail and external locking device and the turnout contact force is determined.

[0022] Furthermore, it also includes the following steps:

[0023] Based on the real-time crawling distance and crawling direction information of the switch rail and external locking device, a data curve of the crawling amount and time of the switch rail and external locking device is generated.

[0024] Based on the real-time acquired turnout contact force, a data curve of turnout contact force versus time is generated.

[0025] Furthermore, it also includes the following steps:

[0026] When the creep distance of the switch rail and external locking device exceeds the set value, and / or when the turnout contact force exceeds the set value, an alarm will be triggered by voice and / or light signals, and a maintenance warning text message will be sent to the maintenance personnel.

[0027] The present invention also provides a system for monitoring the creep and contact force of turnout switch rails and external locking devices, including a magnetic scale, a magnetic field sensor, an optical fiber pin sensor and a data transmission processing device.

[0028] The magnetic field sensor is used to convert the number of magnetic gratings and the magnetic pickup sequence of the sensor itself passing through the magnetic grating ruler into a magnetic signal when the switch rail connecting iron and the connecting iron base undergo relative displacement. The magnetic grating ruler is set on the switch rail connecting iron, and the magnetic field sensor is set on the connecting iron base.

[0029] The fiber optic pin sensor is used to convert the force it receives into a fiber optic signal when the locking hook assembly pushes the connecting iron base. The fiber optic pin sensor is installed in the pin hole on the connecting iron base, and the locking hook assembly is connected to the connecting iron base through the fiber optic pin sensor.

[0030] The data transmission processing device is used to process the received magnetic signals to obtain the creep amount of the switch rail and the external locking device; the data transmission processing device is also used to process the received optical fiber signals to obtain the turnout contact force.

[0031] Furthermore, the data transmission processing device includes a data acquisition and transmission unit and a handheld terminal;

[0032] The acquisition and transmission unit is used to convert the magnetic signal obtained from the magnetic field sensor into a first digital electrical signal and transmit the first digital electrical signal to the handheld terminal via a wireless network.

[0033] The acquisition and transmission unit is also used to convert the optical fiber signal obtained from the optical fiber pin sensor into a second digital electrical signal, and to send the second digital electrical signal to the handheld terminal through a wireless network.

[0034] The handheld terminal is used to process the received first digital electrical signal, obtain the crawling distance information and crawling direction information of the switch rail and the external locking device, and display them;

[0035] The handheld terminal is also used to process the received second digital electrical signal, obtain the turnout contact force, and display it.

[0036] Furthermore, it also includes an online remote monitoring system; wherein, the online remote monitoring system is used to determine the data relationship between the creep of the switch rail and the external locking device and the turnout tightness based on the acquired creep of the switch rail and the external locking device and the acquired turnout tightness.

[0037] The online remote monitoring system is also used to generate data curves of the creep distance and creep direction of the switch rail and external locking device based on the real-time acquired creep distance and creep direction information of the switch rail and external locking device.

[0038] The online remote monitoring system is also used to generate a data curve of turnout contact force versus time based on the real-time acquired turnout contact force.

[0039] Furthermore, the online remote monitoring system is also used to issue alarms via voice and / or light signals when the creep distance of the switch rail and external locking device exceeds the set value, and / or when the turnout contact force exceeds the set value, and to send maintenance warning text messages to maintenance personnel.

[0040] The beneficial effects of this invention are as follows: In this embodiment, the sensing unit is installed on the existing external locking device, eliminating the need for drilling holes in the track bed and rails, or installing other instruments and sensing equipment. This method is simple to install and construct. This invention enables simultaneous monitoring of the creep and contact force of the switch rail and the external locking device.

[0041] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram of a turnout being closely fitted is shown;

[0044] Figure 2 A schematic diagram of the structure of a prior art external locking device is shown;

[0045] Figure 3 A schematic diagram of the prior art switch rail connection assembly structure is shown;

[0046] Figure 4a This diagram illustrates the first state after the close-fitting side tip rail has expanded or contracted.

[0047] Figure 4b A schematic diagram is shown showing the original state of the switch rail and the state of the switch rail after extension and retraction on the repulsive side;

[0048] Figure 4c A schematic diagram of the second state after the close-fitting side tip rail has been extended or retracted is shown;

[0049] Figure 5 A force analysis diagram of the connection between the locking hook assembly and the connecting iron seat is shown after the switch rail is tightly fitted according to an embodiment of the present invention.

[0050] Figure 6 A schematic diagram of the installation of each sensing unit on the external locking device according to an embodiment of the present invention is shown;

[0051] Figure 7 A schematic diagram of the installation of a magnetic field sensing sensor according to an embodiment of the present invention is shown;

[0052] Figure 8 A schematic diagram of a track switch point rail and external locking device creep and contact force monitoring system according to an embodiment of the present invention is shown.

[0053] In the diagram: 101, base rail; 102, switch rail; 103, wing rail; 104, center rail; 1, locking rod assembly; 2, locking hook assembly; 3, locking frame assembly; 4, switch rail connection assembly; 5, switch rail connecting iron; 6, push-pull plate; 7, connecting iron seat; 8, connecting iron seat shaft; 9, slider pin shaft; 10, locking frame; 11, locking iron; 12, elastic roller; 13, magnetic scale; 14, magnetic field sensor; 15, fiber optic pin sensor; 16, close-fitting adjustment piece. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0056] This invention provides a method and system for monitoring the creep and contact force of the switch rail 102 and the external locking device. It eliminates the need for drilling holes in the track bed and track, installing other instruments and sensing devices, making installation simple and construction easy. Furthermore, it enables simultaneous detection of the data relationship between the creep amount and contact force of the switch rail 102 and the external locking device.

[0057] like Figure 2 As shown, the structure and operation performance of the external locking device in this embodiment of the invention will be briefly described first: The external locking device includes a locking rod assembly 1, a locking hook assembly 2, a locking frame assembly 3, and a switch rail connecting assembly 4. The locking frame assembly 3 is fixedly installed on the outside of the base rail 101. The locking rod assembly 1 is located below the base rail 101. The locking hook assembly 2 includes a straight part and an arc-shaped part connected to each other. The straight part of the locking hook assembly 2 is located between the locking frame assembly 3 and the locking rod assembly 1. The arc-shaped part of the locking hook assembly 2 is connected to the switch rail connecting assembly 4.

[0058] The upper end of the straight section of the locking hook assembly 2 is provided with an arc-shaped groove near the locking frame assembly 3, the lower end of the straight section of the locking hook assembly 2 is provided with a groove, and the upper part of the locking rod assembly 1 is provided with a protrusion that matches the groove.

[0059] like Figure 5 As shown, the locking frame assembly 3 includes a locking frame 10, a locking iron 11, and an elastic roller 12. The locking frame 10 is detachably connected to the outside of the main rail 101 by bolts. For example, the locking frame 10 is L-shaped, and the locking iron 11 is Z-shaped. A close-fitting adjustment piece 16 is provided between the locking frame 10 and the locking iron 11. The turnout status is adjusted by adding or removing the close-fitting adjustment piece 16. The elastic roller 12 is mounted on the locking iron 11.

[0060] like Figure 3 As shown, the switch rail connecting assembly 4 includes a switch rail connecting iron 5, a push-pull plate 6, a connecting iron seat 7, a connecting iron seat shaft 8, and a slider pin shaft 9. One end of the switch rail connecting iron 5 is connected to the switch rail 102 by bolts. The first end of the push-pull plate 6 is hinged to the switch rail connecting iron 5 by the slider pin shaft 9. The connecting iron seat 7 is located above the push-pull plate 6. The first end of the connecting iron seat 7 is provided with an L-shaped push stop. The second end of the connecting iron seat 7 is rotatably connected to the second end of the push-pull plate 6 by the connecting iron seat shaft 8. The push-pull plate 6 rotates around the connecting iron seat shaft 8. The connecting iron seat 7 is also provided with a pin hole, and a pin shaft is provided in the pin hole. The arc-shaped part of the locking hook assembly 2 is connected to the connecting iron seat 7 by the pin shaft.

[0061] On the one hand, the switch rail connection component 4 works with other components to unlock, switch and lock the turnout; on the other hand, it has the function of adapting to the expansion and contraction of the switch rail 102.

[0062] The external locking device adapts to the creeping working principle of the switch rail 102: When the close-fitting switch rail 102 extends or retracts, the crank-slider mechanism composed of the connecting iron seat 7, the locking hook, and the push-pull plate 6 remains stationary. The switch rail connecting iron 5 moves along the extension direction of the base rail 101 following the switch rail 102. The fan-shaped arc surface of the push-pull plate 6 only rotates around its axis. The connecting iron seat 7 and the switch rail connecting iron 5 undergo relative displacement. This displacement is the creeping amount of the switch rail 102 and the external locking mechanism. The movement of this mechanism is as follows: Figure 4a and Figure 4c As shown, Figure 4a This diagram shows the first state of the closely fitting side tip rail 102 after it has been extended or retracted. Figure 4c This diagram illustrates the second state of the closely fitted side tip rail 102 after expansion and contraction; as shown. Figure 4b As shown, Figure 4b A schematic diagram is shown of the original state of the switch rail 102 and the state of the repulsive side switch rail 102 after expansion and contraction.

[0063] Force analysis of the external locking device: When the switch rail 102 is switched from the repulsion side to the close contact side, the locking rod assembly 1 pushes the locking hook assembly 2. The locking hook assembly 2 transmits force to the connecting iron seat 7 through the pin shaft. The connecting iron seat 7 transmits force to the push-pull plate 6 through the connecting iron seat shaft 8, which in turn pushes the switch rail connecting iron 5 until the arc groove of the locking hook locks with the elastic roller 12. At this time, the switch rail 102 is switched into position and the turnout is locked. The force on the pin shaft is the turnout close contact force.

[0064] Based on the structure of the external locking device described above, this embodiment of the invention provides a turnout switch rail 102 and an external locking device creep and contact force monitoring system, such as... Figure 6 - Figure 8 As shown, it includes a magnetic scale 13, a magnetic field sensor 14, an optical fiber pin sensor 15, a data transmission processing device, a Bluetooth router, and an online remote monitoring system. The data transmission processing device includes a data acquisition and transmission unit and a handheld terminal, such as a mobile phone or tablet.

[0065] Among them, the magnetic scale 13 is set on the switch rail connecting iron 5, the magnetic field induction sensor 14 is set on the connecting iron base 7, the fiber optic pin sensor 15 is set in the pin hole on the connecting iron base 7, and the arc-shaped part of the locking hook assembly 2 is connected to the connecting iron base 7 through the fiber optic pin sensor 15. In this embodiment of the invention, the connecting pin between the locking hook assembly 2 and the connecting iron base 7 is replaced with the fiber optic pin sensor 15, and the turnout contact force is detected and obtained in real time through the fiber optic pin sensor 15.

[0066] This invention uses a magnetic grating ruler 13 and a magnetic field sensor 14 to monitor the external locking creep. The magnetic grating is encapsulated in the switch rail connecting iron 5, and the magnetic field sensor 14 is encapsulated and connected to the iron base 7. The installation is simple and convenient, the sealing degree is high, it is suitable for outdoor turnout environment, has good long-term stability, high reliability, and the measurement accuracy can reach ±0.1mm.

[0067] The data acquisition and transmission unit is embedded in the head of the fiber optic pin sensor 15. The magnetic field sensor 14 is connected to the data acquisition and transmission unit via a signal line. The fiber optic pin sensor 15 is also connected to the data acquisition and transmission unit via a signal line. The data acquisition and transmission unit is wirelessly connected to the handheld terminal and connected to the online remote monitoring system via a Bluetooth router.

[0068] For example, the data acquisition and transmission unit includes a battery, a processing circuit, and a Bluetooth transmitter. The battery can supply power to the magnetic field sensor 14 and the fiber optic pin sensor 15 via a signal cable. The processing circuit can convert the analog electrical signals output by the magnetic signal and the fiber optic signal into digital electrical signals. At the same time, the converted digital electrical signals are transmitted through the Bluetooth transmitter. It has the common low-power Bluetooth communication protocol and can communicate with handheld terminals (mobile phones, tablets, etc.) with Bluetooth communication capabilities. Thus, the online detection function of the acquired data can be realized through the handheld terminal. The handheld terminal can directly view the switch rail 102 and the external locking creep value, the creep direction of the switch rail 102, and the turnout contact force value.

[0069] The data acquisition and transmission unit of this invention can convert acquired analog electrical signals into digital electrical signals and transmit them via the Bluetooth Low Energy communication protocol, saving installation space for on-site cabling. The data acquisition and transmission unit has a built-in power supply, requiring only timely replacement and eliminating the need for an external power source, further saving space.

[0070] For example, in this embodiment of the invention, an online monitoring function is achieved through a Bluetooth router. This router can receive Bluetooth signals emitted by the data acquisition and transmission unit and transmit data to the online remote monitoring system via a 5G wireless network. During use, the Bluetooth router needs to be placed within a 30-meter radius (60-meter diameter) of the data acquisition and transmission unit. Although the transmission distance is shorter compared to routers using other communication protocols, it can still meet the transmission requirements of the on-site equipment. Furthermore, Bluetooth routers have advantages such as low price and low power consumption, eliminating the need for additional transmission cables and thus enabling wireless transmission of on-site monitoring data.

[0071] The working principle of the fiber optic pin sensor is to use a fiber optic grating as the sensing element, which is laid in the pin shaft. Changes in the pin shaft's stress and strain are converted into shifts in the fiber optic grating's wavelength. The wavelength shift is detected by the acquisition and transmission unit, and based on the mapping relationship between the wavelength shift and the pin shaft strain, real-time detection of the pin shaft's stress and strain is achieved. This embodiment of the invention, by employing a fiber optic pin sensor, exhibits good anti-interference performance, high measurement stability, high accuracy, and no zero-point drift problem.

[0072] In practical applications, firstly, slots are cut into the switch rail connecting iron 5 and the connecting iron base 7, and a magnetic grating ruler 13 of appropriate size is cut and fixed to the switch rail connecting iron 5 with double-sided tape. Then, epoxy resin is used to encapsulate the magnetic grating ruler 13 inside the switch rail connecting iron 5. At the same time, the magnetic field induction sensor 14 is encapsulated in the connecting iron base 7. After the epoxy resin has completely solidified, a grinder is used to polish the surface of the encapsulated epoxy resin to ensure that the treated epoxy resin surface and the switch rail connecting iron 5 and the connecting iron base 7 are flat and smooth, and that the mechanical strength meets the requirements for use, ensuring that it does not affect normal use. The pin connecting the connecting iron base 7 to the locking hook assembly 2 is replaced with a fiber optic pin sensor 15 of the same size. The magnetic field sensor signal line is connected to the acquisition and transmission unit at the head of the fiber optic pin sensor 15, and the wiring is heat-fused with heat shrink tubing.

[0073] The monitoring system of this invention installs each sensing unit on the existing external locking device, eliminating the need to drill holes in the track bed and rails or install other instruments and sensing devices. This method is simple to install and construct, and enables simultaneous monitoring of the creep and contact force of the switch rail 102 and the external locking device.

[0074] Based on the above-mentioned system for monitoring the creep and contact force of the turnout switch rail 102 and external locking device, this embodiment of the invention also provides a method for monitoring the creep and contact force of the turnout switch rail 102 and external locking device, comprising the following steps:

[0075] S1. When the switch rail connecting iron 5 and the connecting iron base 7 are relatively displaced, the magnetic field sensor 14 converts the number of magnetic grids and the magnetic pickup sequence that it has passed through the magnetic grid ruler 13 into a magnetic signal.

[0076] S2. When the locking hook assembly 2 pushes the connecting iron base 7, the fiber optic pin sensor 15 converts the force it receives into a fiber optic signal.

[0077] S3. The data transmission processing device processes the received magnetic signal to obtain the creep amount of the switch rail 102 and the external locking device as follows:

[0078] The acquisition and transmission unit converts the magnetic signal obtained from the magnetic field sensor 14 into a first digital electrical signal and sends the first digital electrical signal to the handheld terminal via a wireless network. The handheld terminal processes the received first digital electrical signal to obtain the crawling distance information and crawling direction information of the switch rail 102 and the external locking device, and displays it to obtain the crawling amount of the switch rail 102 and the external locking device.

[0079] This invention enables real-time monitoring of the creep of the switch rail 102 by monitoring the creep of the external locking device, thus providing strong data support for on-site maintenance personnel.

[0080] S4. The data transmission processing device processes the received optical fiber signal to obtain the turnout contact force as follows:

[0081] The acquisition and transmission unit also converts the optical fiber signal obtained from the optical fiber pin sensor 15 into a second digital electrical signal, and sends the second digital electrical signal to the handheld terminal through a wireless network.

[0082] The handheld terminal also processes the received second digital signal to obtain the force on the fiber optic pin sensor 15 and displays it, thus obtaining the turnout contact force.

[0083] The method for monitoring the creep and contact force of the turnout switch rail 102 and the external locking device also includes the following steps:

[0084] S5. Determine the data relationship between the creep of switch rail 102 and external locking device and the turnout contact force, as follows:

[0085] The acquisition and transmission unit sends a first digital electrical signal to the online remote monitoring system via a Bluetooth router. The online remote monitoring system processes the received first digital electrical signal to obtain and store the creep distance and creep direction information of the switch rail 102 and the external locking device. The acquisition and transmission unit also sends a second digital electrical signal to the online remote monitoring system via a Bluetooth router. The online remote monitoring system processes the received second digital electrical signal to obtain and store the force on the fiber optic pin sensor 15. The online remote monitoring system also determines the data relationship between the creep distance and creep direction information of the switch rail 102 and the external locking device and the turnout contact force based on the obtained creep distance and creep direction information of the switch rail 102 and the external locking device, as well as the obtained force on the fiber optic pin sensor 15.

[0086] S6 generates data curves of creep amount and time for switch rail 102 and external locking device, as well as data curves of turnout contact force and time.

[0087] The online remote monitoring system also generates a data curve of the creep distance and creep direction of the switch rail 102 and the external locking device as a function of time based on the real-time acquired creep distance and creep direction information of the switch rail 102 and the external locking device; the online remote monitoring system also generates a data curve of the turnout sealing force as a function of time based on the real-time acquired force on the fiber optic pin sensor 15.

[0088] S7. When the creep distance of the switch rail 102 and the external locking device exceeds the set value, and / or when the force on the fiber optic pin sensor 15 exceeds the set value, the online remote monitoring system is also used to issue an alarm via voice and / or light signals, and send maintenance warning text messages to maintenance personnel.

[0089] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring the creep and contact force of a turnout switch rail and external locking device, characterized in that, Includes the following steps: When the switch rail connecting iron and the connecting iron base undergo relative displacement, the magnetic field induction sensor converts the number of magnetic grids it passes through on the magnetic grid ruler and the magnetic pickup sequence into a magnetic signal; wherein, the magnetic grid ruler is set on the switch rail connecting iron, and the magnetic field induction sensor is set on the connecting iron base. When the locking hook assembly pushes the connecting iron base, the fiber optic pin sensor converts the force it receives into a fiber optic signal; the fiber optic pin sensor is installed in the pin hole on the connecting iron base, and the locking hook assembly is connected to the connecting iron base through the fiber optic pin sensor. Processing the magnetic signal to obtain the creep amount of the switch rail and the external locking device includes: converting the magnetic signal from the magnetic field sensor into a first digital electrical signal, processing the first digital electrical signal, and obtaining the creep distance information and creep direction information of the switch rail and the external locking device. Processing the optical fiber signal to obtain the turnout contact force includes: converting the optical fiber signal from the optical fiber pin sensor into a second digital electrical signal, processing the second digital electrical signal, and obtaining the turnout contact force. Based on the obtained creep amount of the switch rail and external locking device, and the obtained turnout contact force, determine the data relationship between the creep amount of the switch rail and external locking device and the turnout contact force. Based on the real-time crawling distance and crawling direction information of the switch rail and external locking device, a data curve of the crawling amount and time of the switch rail and external locking device is generated. Based on the real-time acquired turnout contact force, a data curve of turnout contact force versus time is generated.

2. The method for monitoring the creep and contact force of the turnout switch rail and external locking device according to claim 1, characterized in that, It also includes the following steps: When the creep distance of the switch rail and external locking device exceeds the set value, and / or when the turnout contact force exceeds the set value, an alarm will be triggered by voice and / or light signals, and a maintenance warning text message will be sent to the maintenance personnel.

3. A system for monitoring the creep and contact force of a turnout switch rail and external locking device, characterized in that, Includes magnetic scale, magnetic field sensor, fiber optic pin sensor and data transmission processing device; The magnetic field sensor is used to convert the number of magnetic gratings and the magnetic pickup sequence of the sensor itself passing through the magnetic grating ruler into a magnetic signal when the switch rail connecting iron and the connecting iron base undergo relative displacement. The magnetic grating ruler is set on the switch rail connecting iron, and the magnetic field sensor is set on the connecting iron base. The fiber optic pin sensor is used to convert the force it receives into a fiber optic signal when the locking hook assembly pushes the connecting iron base. The fiber optic pin sensor is installed in the pin hole on the connecting iron base, and the locking hook assembly is connected to the connecting iron base through the fiber optic pin sensor. The data transmission processing device is used to process the received magnetic signals to obtain the creep amount of the switch rail and the external locking device; the data transmission processing device is also used to process the received optical fiber signals to obtain the turnout contact force. It also includes an online remote monitoring system; wherein, the online remote monitoring system is used to determine the data relationship between the creep of the switch rail and the external locking device and the turnout tightness based on the obtained creep of the switch rail and the external locking device and the obtained turnout tightness. The online remote monitoring system is also used to generate data curves of the creep distance and creep direction of the switch rail and external locking device based on the real-time acquired creep distance and creep direction information of the switch rail and external locking device. The online remote monitoring system is also used to generate a data curve of turnout contact force versus time based on the real-time acquired turnout contact force. The data transmission processing device includes a data acquisition and transmission unit and a handheld terminal; The acquisition and transmission unit is used to convert the magnetic signal obtained from the magnetic field sensor into a first digital electrical signal and transmit the first digital electrical signal to the handheld terminal via a wireless network. The acquisition and transmission unit is also used to convert the optical fiber signal obtained from the optical fiber pin sensor into a second digital electrical signal, and to send the second digital electrical signal to the handheld terminal through a wireless network. The handheld terminal is used to process the received first digital electrical signal, obtain the crawling distance information and crawling direction information of the switch rail and the external locking device, and display them; The handheld terminal is also used to process the received second digital electrical signal, obtain the turnout contact force, and display it.

4. The track switch point rail and external locking device creep and contact force monitoring system according to claim 3, characterized in that, The online remote monitoring system is also used to issue alarms via voice and / or light signals when the creep distance of the switch rail and external locking device exceeds the set value, and / or when the turnout contact force exceeds the set value, and to send maintenance warning text messages to maintenance personnel.

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