A turnout working condition monitoring device, system and method

Abstract

The present application relates to the technical field of railway monitoring, and particularly relates to a turnout working condition monitoring device, system and method, wherein the device is arranged on a sleeper; the device comprises: a device body arranged on the sleeper; a target assembly arranged in the device body and movably connected with the device body; the target assembly comprises oppositely arranged first and second targets, the first target is fixedly connected with a switch rail through a first connecting piece, and the second target is fixedly connected with a stock rail through a second connecting piece. The device, system and method provided by the present application arrange the target assembly in the device body and movably connect the target assembly with the device body, thereby reducing the influence of environmental factors on the target assembly during application, improving the effectiveness and accuracy of monitoring, and reducing the difficulty of equipment maintenance.

Description

Technical Field

[0001] This invention relates to the field of railway monitoring technology, and in particular to a turnout condition monitoring device, system and method. Background Technology

[0002] Railway turnouts are crucial infrastructure for ensuring efficient train operation. They are primarily responsible for switching between tracks, ensuring trains travel in the correct direction. Turnouts are also fundamental engineering facilities for shunting and marshalling at stations. Turnout traction components need to operate smoothly in various outdoor environments, requiring extremely high safety, stability, and reliability. Even with improvements in rail materials, deformation of the rails at turnout traction points due to train pressure still occurs. Furthermore, obstructions caused by foreign objects and malfunctions in turnout switching equipment are frequent occurrences. For example, creeping of the switch rails and lateral displacement of the stock rails can cause changes in the stock rail frame dimensions, all of which endanger train safety. Frontline maintenance units lack monitoring methods for the infrastructure at traction points, stock rails, and switch rails, requiring workers to frequently patrol the tracks for maintenance and repair, resulting in significant workload pressure.

[0003] To address this technical problem, the turnout detection technology provided in the relevant technologies monitors the turnout's operating condition by deploying a monitoring box at the turnout center, deploying targets on the switch rail and main rail, and using a laser rangefinder sensor.

[0004] However, the relevant technologies still have the following technical shortcomings in practical applications:

[0005] When targets are exposed to outdoor, non-enclosed environments, they are highly susceptible to factors such as ambient light, dust, rain and snow, oil stains, obstruction by foreign objects, and temperature drift, resulting in low system reliability and high maintenance requirements. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a turnout condition monitoring device, system and method.

[0007] In a first aspect, embodiments of the present invention provide a turnout condition monitoring device, the device being disposed on a sleeper; the device includes:

[0008] The device body is mounted on the sleeper;

[0009] A target assembly is disposed within the device body; the target assembly includes a first target and a second target arranged opposite to each other, the first target being fixedly connected to a switch rail via a first connector, and the second target being fixedly connected to a base rail via a second connector;

[0010] A monitoring module is disposed within the device body, and the monitoring module includes the target component; it is used to monitor the distance between the target component and the monitoring module under train operating conditions.

[0011] A communication unit is located on one side of the device body. The communication unit is connected to the monitoring module and also communicates with an external controller.

[0012] In conjunction with the first aspect, the first target includes:

[0013] The first part is parallel to the inner surface of the switch rail;

[0014] The second part is fixedly connected to the first part. The second part is fixedly connected to one end of the first connector. The other end of the first connector is fixedly connected to the inner side of the switch rail. The second part is fixedly connected to the switch rail through the first connector.

[0015] In conjunction with the first aspect, the second target includes:

[0016] The third part is parallel to the inner surface of the basic track;

[0017] The fourth part is fixedly connected to the third part. One end of the fourth part is fixedly connected to the second connector, and the other end of the second connector is fixedly connected to the base rail. The fourth part is fixedly connected to the base rail through the second connector.

[0018] In conjunction with the first aspect, the monitoring module includes:

[0019] A first monitoring fixture, facing the first target, is used to monitor a first distance between the first target and the first monitoring fixture.

[0020] The second monitoring fixture faces the second target and is used to monitor the second distance between the second target and the second monitoring fixture.

[0021] In conjunction with the first aspect, the first monitoring fixture includes:

[0022] First data acquisition board;

[0023] A first laser ranging sensor, facing the first part, is used to monitor the first distance from the first part to the first laser ranging sensor under train operating conditions.

[0024] The second laser ranging sensor, facing the second part, is used to monitor the second distance between the second part and the second laser ranging sensor under train operating conditions;

[0025] The first laser ranging sensor and the second laser ranging sensor are respectively connected to the circuit of the first acquisition board and form an integrated structure.

[0026] In conjunction with the first aspect, the second monitoring fixture includes:

[0027] Second acquisition board;

[0028] The third laser ranging sensor, facing the third part, is used to monitor the third distance from the third part to the third laser ranging sensor under train operating conditions.

[0029] A fourth laser ranging sensor, facing the fourth unit, is used to monitor the fourth distance from the fourth unit to the fourth laser ranging sensor under train operating conditions.

[0030] The third laser ranging sensor and the fourth laser ranging sensor are integrated with the circuitry of the second acquisition board.

[0031] In conjunction with the first aspect, the device further includes:

[0032] An eddy current sensor pre-module is located on one side of the first monitoring fixture within the device body, and the eddy current sensor pre-module is connected to the communication unit via a line.

[0033] An eddy current sensor probe is connected to the circuit of the eddy current sensor front module. The eddy current sensor probe is located on the side of the first part away from the first monitoring fixture and is used to monitor the fifth distance from the eddy current sensor probe 61 to the first part.

[0034] Secondly, embodiments of this application provide a turnout condition monitoring system, the system including the device and external controller as described above, the external controller being communicatively connected to the monitoring module and the communication unit;

[0035] The system also includes a sleeper displacement monitoring device, which includes a foundation pile and a displacement monitoring mechanism. The foundation pile is buried in the center of the sleeper ground, and the displacement monitoring mechanism includes a laser sensor or an eddy current sensor. A metal target is installed on the side of the sleeper. There are two displacement monitoring mechanisms, each facing the target, to monitor the amount of sleeper displacement.

[0036] Thirdly, embodiments of this application provide a method for monitoring the operating conditions of a turnout, the method comprising:

[0037] Obtain current monitoring indicators and current temperature;

[0038] Based on the current monitoring indicators and the current temperature, calculate the target indicator obtained after temperature compensation at the current temperature;

[0039] For each of the target indicators, determine whether the target indicator meets the set requirements;

[0040] If not, return a message indicating that the target indicator is not up to standard;

[0041] The target indicators include at least one of the following: opening distance indicator, switch rail creep indicator, stock rail creep indicator, track gauge indicator, stock rail lateral displacement indicator, and contact amount indicator.

[0042] In conjunction with the third aspect, the step of calculating the target indicator after temperature compensation at the current temperature based on the current monitoring indicators and the current temperature includes:

[0043] Calculate using the following formula:

[0044]

[0045] Among them, R TC The target index after temperature compensation; T is the current temperature; R T The current monitoring indicator is w0, which is the first preset temperature compensation coefficient, w1 is the second preset temperature compensation coefficient, w2 is the third preset temperature compensation coefficient, and T0 is the standard temperature.

[0046] The embodiments of the present invention bring the following beneficial effects: This application provides a turnout condition monitoring device, system, and method. The turnout condition monitoring device is installed on a sleeper. The device includes: a device body installed on the sleeper; a target assembly installed within the device body, the target assembly being movably connected to the device body; the target assembly includes a first target and a second target arranged opposite to each other, the first target being fixedly connected to the switch rail via a first connector, and the second target being fixedly connected to the stock rail via a second connector; a monitoring module installed within the device body, the monitoring module facing the target assembly; used to monitor the distance between the target assembly and the monitoring module under train operating conditions; and a communication unit installed on one side outside the device body, the communication unit being connected to the monitoring module and also communicating with an external controller.

[0047] The turnout condition monitoring device, system, and method provided by this invention place the target component inside the device body and movably connect it to the device body, thereby reducing the impact of environmental factors on the target component during application, and performing temperature drift compensation processing on the current monitoring indicators based on the ambient temperature to obtain the target monitoring indicators, thereby improving the effectiveness and accuracy of monitoring and reducing the difficulty of equipment maintenance.

[0048] Other features and advantages of the invention will be set forth in the description which follows, 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 are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0049] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the turnout condition monitoring device provided in Embodiment 1 of the present invention;

[0052] Figure 2 This is a schematic diagram of another turnout condition monitoring device provided in Embodiment 1 of the present invention;

[0053] Figure 3 The flowchart is for the turnout condition monitoring method provided in Embodiment 2 of the present invention.

[0054] Figure label:

[0055] 10-Device body;

[0056] 20 - Target assembly, 21 - First target, 211 - First part, 212 - Second part, 22 - Second target, 221 - Third part, 222 - Fourth part;

[0057] 30-Monitoring module, 31-First monitoring fixture, 311-First acquisition board, 312-First laser ranging sensor, 313-Second laser ranging sensor, 32-Second monitoring fixture, 321-Second acquisition board, 322-Third laser ranging sensor, 323-Fourth laser ranging sensor;

[0058] 40 - Communication Unit;

[0059] 51-First connector, 52-Second connector;

[0060] 60 - Eddy current sensor pre-module, 61 - Eddy current sensor probe. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions 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.

[0062] To facilitate understanding of this embodiment, the technical terms used in this application will be briefly introduced below.

[0063] Opening distance: refers to the distance between the non-operating edge of the tip rail and the operating edge of the base rail, which is specified to be measured at the center of the first connecting rod 380mm from the tip rail.

[0064] Turnout creep, also known as turnout slippage, is the longitudinal displacement of the switch rail relative to the stock rail or the relative displacement of the two switch rails. The offset of the two stock rails of the turnout is the creep of the stock rail.

[0065] After introducing the technical terms used in this application, the application scenarios and design concepts of the embodiments of this application will be briefly described below.

[0066] Railway turnouts are fundamental engineering facilities for shunting and marshalling at stations, and also crucial for ensuring efficient train operation. The turnout detection devices provided in related technologies deploy a monitoring box at the turnout center and targets on the switch rails and stock rails, using laser rangefinders to monitor the turnout's operating condition. However, the targets are exposed to outdoor, non-enclosed environments, making them highly susceptible to factors such as ambient light, dust, rain, snow, oil contamination, and obstruction by foreign objects, resulting in low system reliability and demanding maintenance requirements.

[0067] Based on this, this application provides a turnout condition monitoring device, system, and method, which sets a target inside the device body and connects it movably to the device body, thereby reducing the impact of the external environment on the target, improving monitoring accuracy, reliability, and effectiveness, and facilitating equipment maintenance.

[0068] Example 1

[0069] This application provides a turnout condition monitoring device, combined with Figure 1 As shown, the device is installed on the sleeper; the device includes: device body 10, target assembly 20, monitoring module 30 and communication unit 40.

[0070] The main body of the device 10 is located on the sleeper.

[0071] The target assembly 20 is located inside the device body 10 and is movably connected to the device body 10. The target assembly 20 includes a first target 21 and a second target 22 that are arranged opposite to each other. The first target 21 is fixedly connected to the tip rail through a first connector 51, and the second target 22 is fixedly connected to the base rail through a second connector 52.

[0072] The monitoring module 30 is located inside the device body 10 and faces the target component 20; it is used to monitor the distance between the target component 20 and the monitoring module 30 under train operation conditions.

[0073] The communication unit 40 is located on one side outside the device body 10. The communication unit 40 is connected to the monitoring module 30 and is also connected to an external controller.

[0074] The turnout condition monitoring device provided in this application has a target component 20 installed inside the device body 10 and movably connected to the device body 10, thereby reducing the impact of environmental factors on the target component 20 during application, thus improving the effectiveness of monitoring and reducing the difficulty of equipment maintenance.

[0075] An opening is provided on the outer wall of the device body 10 to allow the target assembly 20 to move relative to the device body 10. Figure 1 As shown, the outer track is the stock rail, the inner track is the switch rail, and the track perpendicular to the stock rail is the sleeper. The device body 10 is fixed on the sleeper, and the target component 20 is fixedly connected to the stock rail or switch rail. During the turnout movement, the target component 20 moves along with the stock rail or switch rail. The monitoring module 30 obtains the distance values ​​required for each indicator and transmits them to the external controller through the communication unit 40 to calculate various indicators of the turnout's working condition.

[0076] In this embodiment, as one feasible method, the device body 10 is tied to the sleeper. Fixing the device body 10 to the sleeper by tying facilitates installation and disassembly. In practical applications, other methods such as bolt connection, snap-fit, or vacuum adsorption connection can also be used to fix the device body 10 to the sleeper; no limitation is made here.

[0077] The target assembly 20 is located inside the device body 10 and is movably connected to the device body 10. In this way, the device body 10 serves as a protective shell for the target assembly 20, which can prevent the external environment or foreign objects from obstructing the target assembly. This can improve the reliability of the system and facilitate equipment maintenance.

[0078] The target assembly 20 includes a first target 21 and a second target 22 arranged opposite to each other. The first target 21 is fixedly connected to the switch rail through a first connector 51, and the second target 22 is fixedly connected to the stock rail through a second connector 52. In this way, when the position of the stock rail and the switch rail changes during train operation, the first target 21 and the second target 22 will be displaced. The actual turnout working condition can be calculated by measuring the distance value by the monitoring module.

[0079] In conjunction with the first aspect, the first target 21 includes: a first part 211 and a second part 212.

[0080] Part 211 is parallel to the inner side of the switch rail.

[0081] The second part 212 is fixedly connected to the first part 211 and is perpendicular to the first part 211. The second part 212 is fixedly connected to one end of the first connector 51, and the other end of the first connector 51 is fixedly connected to the inner side of the switch rail. The second part 212 is fixedly connected to the switch rail through the first connector 51.

[0082] Combination Figure 2 As shown, in this embodiment, the angle between the first part 211 and the second part 212 is 90 degrees; the first target 21 is composed of the first part 211 and the second part 212 connected perpendicularly to each other, wherein the second part 212 is fixedly connected to the tip rail through the first connector 51, so that the movement of the tip rail drives the first connector 51 and the first target 21 to move.

[0083] As one feasible approach, the first connector 51 is a separate connector, with its two ends connected to the second part 212 and the switch rail, respectively. In this embodiment, the first connector 51 is fixed to the switch rail by the tip bolts of the switch rail. This structure is simple and easy to obtain materials. Other fixing methods can also be used in practical applications, and are not limited here.

[0084] In conjunction with the first aspect, the second target 22 includes: the third part 221 and the fourth part 222.

[0085] Part 3, 221, is parallel to the inner surface of the basic rail;

[0086] The fourth part 222 is fixedly connected to the third part 221. In this embodiment, the included angle between the fourth part 222 and the third part 221 is 90 degrees. The fourth part 222 is fixedly connected to one end of the second connecting member 52, and the other end of the second connecting member 52 is fixedly connected to the base rail. The fourth part is fixedly connected to the base rail through the second connecting member.

[0087] Similarly, the third part 221 and the fourth part 222 are connected to form a second target 22 with a right-angled structure, which is fixedly connected to the basic rail via the second connector 52.

[0088] In this way, under train operation conditions, the monitoring module 30 monitors the first current distance from the first target 21 and the second current distance from the second target 22; based on the first current distance, the second current distance and the distance data monitored previously, it calculates information on various indicators of turnout operation conditions, thereby realizing turnout operation condition monitoring, so as to facilitate engineering management and equipment maintenance.

[0089] In conjunction with the first aspect, the monitoring module 30 includes: a first monitoring fixture 31 and a second monitoring fixture 32.

[0090] The first monitoring fixture 31 faces the first target 21 and is used to monitor the first distance between the first target 21 and the first monitoring fixture 31.

[0091] The second monitoring fixture 32 faces the second target 22 and is used to monitor the second distance between the second target 22 and the second monitoring fixture 32.

[0092] In conjunction with the first aspect, the first monitoring fixture 31 includes: a first acquisition board 311, a first laser ranging sensor 312, and a second laser ranging sensor 313. The first laser ranging sensor 312 and the second laser ranging sensor 313 are respectively connected to the first acquisition board 311 in a single integrated structure.

[0093] The first laser rangefinder 312 faces the first part 211 and is used to monitor the first distance between the first part 211 and the first laser rangefinder 312 under train operation conditions. With the first laser rangefinder 312 facing the first part 211, the first distance in the straight line between the first part 211 of the first target 21 and the first laser rangefinder 312 is measured. This first distance is used to characterize the opening index of the turnout operation condition.

[0094] Specifically, the first distance measured by the first laser ranging sensor 312 during the initial calibration and when the turnout is in the close contact position is recorded as L1; when the turnout is in the repulsive position, the first distance measured by the first laser ranging sensor 312 again is recorded as L2, and the opening value at this time is actually detected as L0. According to the formula L0=a×(L2-L1), the coefficient a can be determined.

[0095] Subsequently, during the actual working condition monitoring process, the current first distance Ln is measured. At this time, the opening value L = a × (Ln - L1).

[0096] The second laser rangefinder 313 faces the second part 212 and is used to monitor the second distance between the second part 212 and the second laser rangefinder 313 under train operating conditions. The second distance in the straight line from the second part 212 to the second laser rangefinder 313 is measured, and this second distance is used to characterize the switch rail creep index under turnout operating conditions.

[0097] Specifically, during initial calibration, the initial value of the second distance measured by the second laser rangefinder 313 is recorded as D0. After one adjustment, the second distance measured again is recorded as D1.

[0098] At this point, the creep of the switch rail connected to the second part 212 is calculated as ΔD1=D1-D0.

[0099] Similarly, to calculate the creep of another switch rail, the same setup and measurement can be performed to obtain the switch rail creep ΔD2.

[0100] The relative displacement between the two switch rails can then be calculated using the following formula:

[0101] ΔD = ΔD1 - ΔD2.

[0102] Compared to the laser ranging sensor being placed on one side in related technologies, this application uses a method to obtain straight-line distance, which eliminates the need for conversion between oblique position and straight-line distance, reducing the complexity of data processing and error rate, thereby improving monitoring accuracy.

[0103] In conjunction with the second aspect, the second monitoring fixture 32 includes: a second acquisition board 321, a third laser ranging sensor 322, and a fourth laser ranging sensor 323.

[0104] The third laser rangefinder 322 faces the third part 221 and is used to monitor the third distance between the third part 221 and the third laser rangefinder 322 under train operation conditions.

[0105] This third distance, combined with the second and / or first distance, characterizes the closeness value of the turnout operation condition, specifically:

[0106] The initial contact value m0 at the initial contact position is obtained. After one turn, the current contact value mx = m0 + (m2 - m1) is calculated based on the first distance m1 measured by the first laser rangefinder 312 and the third distance m2 measured by the third laser rangefinder 322. Based on this, the contact value index for the turnout working condition is obtained.

[0107] The lateral displacement of the main rail is ΔC = C1 - C0, where C1 is the current third distance and C0 is the third distance at the initial calibration. Based on this, the lateral displacement index of the main rail under turnout operating conditions is obtained.

[0108] The fourth laser ranging sensor 323 faces the fourth part 222 and is used to monitor the fourth distance from the fourth part 222 to the fourth laser ranging sensor 323 under train operating conditions. The third distance, combined with the second distance and / or the first distance, characterizes the base rail creep distance under turnout operating conditions. The method is similar to the above-described method for calculating the switch rail creep distance; the creep distance of the base rail fixedly connected to the fourth part 222 is obtained by calculating the difference between the current fourth distance and the initial fourth distance.

[0109] In conjunction with the first aspect, the device also includes:

[0110] The eddy current sensor pre-module 60 is located on one side of the first monitoring fixture 31 inside the device body 10, and the eddy current sensor pre-module 60 is connected to the communication unit 40 by line.

[0111] The eddy current sensor probe 61 is connected to the eddy current sensor preamplifier module 60. The eddy current sensor probe 61 is located on the side of the first part 211 away from the first monitoring fixture 31, and is used to monitor the distance from the eddy current sensor probe 61 to the fifth page of the first part 211.

[0112] For scenarios requiring high monitoring accuracy, an eddy current sensor front module 60 is used to replace the first laser ranging sensor 312. It faces the first part 211 to obtain the vertical distance between the eddy current sensor probe 61 and the first step 211, i.e., the fifth distance, and calculates the opening distance index of the switch rail based on the fifth distance.

[0113] It is worth noting that there can be multiple configuration pairs of target assembly 20 and monitoring module 30 within the device body 10, combined with... Figure 2 As shown, there are two sets of target components 20 and monitoring modules 30, and they are symmetrically arranged along the centerline of the device body 10 in the first direction. Each target component 20 corresponds to one monitoring module 30.

[0114] For two base rails, the current third distances are obtained as C1 and C2, respectively; the track gauge between the two base rails is denoted as C; C = C1 + C2 + P, where P is the distance between the two third laser ranging sensors 322, which is a fixed value measured during assembly. Based on this, the track gauge index for the turnout operation is calculated.

[0115] In conjunction with the first aspect, the first acquisition board 311, the second acquisition board 321, and the eddy current sensor pre-module 60 are all connected via a pre-set circuit. This circuit converges and is electrically connected to a waterproof connector located on the outer wall of the device body 10. The communication unit 40 is also electrically connected to this waterproof connector via a circuit. This plug-and-play connection method facilitates on-site debugging, installation, and disassembly. Furthermore, the connecting cable between the device body 10 and the communication unit 40 can be buried along the rail, thus eliminating exposed wiring at the turnout points, ensuring operational safety, and preventing interference with tamping and maintenance work on the turnouts. This also protects the track from exposure, extending its service life.

[0116] Preferably, a Kalman filter (not shown in the figure) is also provided within the device body 10. This Kalman filter is communicatively connected to the first acquisition board 311, the second acquisition board 321, and the eddy current sensor pre-processing module 60, and is used to filter the data acquired by the first acquisition board 311, the second acquisition board 321, and the eddy current sensor pre-processing module 60. This is a relatively common data preprocessing method, and is therefore limited here.

[0117] Preferably, before the device body 10 is tied to the sleeper, a buffer device (not shown in the figure) is set between the device body 10 and the sleeper. In this embodiment, as an implementable method, the buffer device is a rubber pad, which buffers the vibration during operation by having an elastic rubber pad, which helps to improve the monitoring accuracy.

[0118] Secondly, this application provides a turnout condition monitoring system, including the aforementioned device and an external controller, wherein the external controller is communicatively connected to the monitoring module 30 and the communication unit 40.

[0119] Through the aforementioned device structure and installation location, the monitoring module 30 can obtain a relatively accurate distance value and send the distance value to the external controller via the communication unit 40. The external controller then calculates and determines the final turnout operating condition monitoring index.

[0120] The turnout condition monitoring system also includes a sleeper displacement monitoring device (not shown in the figure). The sleeper displacement monitoring device includes a foundation pile and a displacement monitoring mechanism. The foundation pile is buried in the ground at the center of the sleeper. The displacement monitoring mechanism includes a laser sensor or an eddy current sensor. A metal target is installed on the side of the sleeper. There are two displacement monitoring mechanisms, each facing the target, to monitor the displacement of the sleeper.

[0121] As a preferred option, monitoring the sleeper displacement is added, and the sleeper's own lateral or longitudinal displacement is used as a benchmark for compensation to compensate for the calculated monitoring indicators, thereby further improving the monitoring accuracy of the turnout condition. Based on this, the corrected opening value L' = a × (Ln - L1 - sleeper lateral displacement).

[0122] The corrected point rail creep is ΔD1 = D1 - D0 - sleeper longitudinal displacement;

[0123] The corrected lateral displacement of the basic rail is ΔC = C1 - C0 - sleeper lateral displacement;

[0124] The corrected track gauge between the two basic rails is C = C1 + C2 + P - lateral displacement of the sleeper.

[0125] One feasible approach is to replace the laser sensor with a magnetic telescopic ruler, install a structural component on the side of the sleeper, and fix a magnetic ring on the component. When the sleeper is displaced, the magnetic ring is displaced accordingly, and the magnetic telescopic ruler can detect the amount of sleeper displacement. This amount of displacement is used as a benchmark compensation value, and the sleeper's own displacement is subtracted when calculating all monitoring indicators.

[0126] Example 2

[0127] Thirdly, this application provides a turnout condition monitoring method, which is applied to an external controller in the above-mentioned system. The controller includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method provided in the embodiments of this application.

[0128] Combination Figure 3 As shown, the method specifically includes:

[0129] S110, the processor obtains the current monitoring indicators and the current temperature.

[0130] S120: The processor calculates the target index after temperature compensation at the current temperature based on the current monitored index and the current temperature.

[0131] S130, for each of the target indicators, the processor determines whether the target indicator meets the set requirements.

[0132] If the target indicators do not meet the set requirements, proceed to step S140.

[0133] S140, the processor returns a message indicating that the target indicator is not up to standard.

[0134] The turnout condition monitoring method provided in this embodiment obtains the current temperature, corrects the current monitoring indicators based on the current temperature, and obtains the target indicators after temperature compensation at the current temperature. This reduces measurement errors caused by temperature changes, thereby improving the accuracy and effectiveness of the monitoring indicators. Then, it judges whether the target indicators meet the set requirements. If the target indicators do not meet the set requirements, it returns a prompt message indicating that the target indicators are unqualified, prompting equipment maintenance personnel to carry out timely repairs.

[0135] The system also includes a temperature sensor for detecting temperature. The current temperature measured by the temperature sensor is obtained through a communication connection between the temperature sensor and an external controller. Preferably, the temperature sensor and the device body 10 are located in the same environment to obtain an accurate current temperature.

[0136] In conjunction with the first aspect, step S120, which calculates the target indicator after temperature compensation at the current temperature based on the current monitoring indicators and the current temperature, includes:

[0137] Calculate using the following formula:

[0138]

[0139] Among them, R TC The target index after temperature compensation; T is the current temperature; R T The current monitoring indicator is w0, which is the first preset temperature compensation coefficient, w1 is the second preset temperature compensation coefficient, w2 is the third preset temperature compensation coefficient, and T0 is the standard temperature.

[0140] In this embodiment, the target indicators include at least one of the following: opening distance indicator, switch rail crawling indicator, stock rail crawling indicator, track gauge indicator, stock rail lateral displacement indicator, and contact amount indicator.

[0141] The values ​​corresponding to each target indicator are the same as those in Example 1, and will not be repeated here.

[0142] This embodiment reduces measurement errors caused by ambient temperature through temperature compensation, thereby improving monitoring accuracy and effectiveness.

[0143] The method for determining the three preset temperature compensation coefficients in step S120 is as follows:

[0144] The target formula is stored in memory:

[0145] R T =R T0 +(w0+w1R T0 (T-T0)+w2R T0 (T-T0) 2 ;

[0146] Among them, R T R is the output value at any temperature T. T0 This is the output value at the standard temperature T0, where w0 is the first preset temperature compensation coefficient, w1 is the second preset temperature compensation coefficient, and w2 is the third preset temperature compensation coefficient.

[0147] Actual measured target monitoring indicators at temperatures T1, T2, and T3: R T1 R T2R T3 .

[0148] Based on the above target formula, the output values ​​measured at temperatures T1, T2, and T3 can be expressed as follows:

[0149] R T1 =R T0 +(w0+w1R T0 (T1-T0)+w2R T0 (T1-T0) 2 ;

[0150] R T2 =R T0 +(w0+w1R T0 (T2-T0)+w2R T0 (T2-T0) 2 ;

[0151] R T3 =R T0 +(w0+w1R T0 (T3-T0)+w2R T0 (T3-T0) 2 .

[0152] Based on the above three formulas, we can determine that w0 is the first preset temperature compensation coefficient, w1 is the second preset temperature compensation coefficient, and w2 is the third preset temperature compensation coefficient.

[0153] Next, step S130 determines whether each target indicator meets the corresponding set requirements. If not, it indicates that the target indicator is abnormal. At this time, step S140 returns a prompt message that the target indicator is unqualified.

[0154] In this embodiment, combining these three aspects, the target component 20 and the monitoring module 30 are arranged in two groups, symmetrically along the centerline of the device body 10 in the first direction. Figure 2 As shown, the first direction is the length direction of the device body 10.

[0155] The first distance measured by the first laser ranging sensor 312 or the fifth distance measured by the eddy current sensor probe 61 can determine whether the turnout is in the correct or reverse position.

[0156] For example, when the turnout is in position, combined with Figure 1 As shown, the upper switch rail is in a close contact state, while the lower switch rail is in a repelling state. At this time, the distance S1 measured by the upper monitoring module 30 should be greater than the distance S2 measured by the lower monitoring module 30.

[0157] When the turnout is in the reverse position, the opposite is true; the distance S1 measured by the upper monitoring module 30 should be less than the distance S2 measured by the lower monitoring module 30.

[0158] When a fault occurs in the turnout indication circuit, this method, combined with the results of close-fitting monitoring, can be used to help determine whether the turnout has been moved to the correct position and whether it is in the correct or reversed position.

[0159] The turnout switching process lasts approximately a few seconds. If there is a significant change in the distance measured within a unit sampling time, it indicates that the turnout has been switched during this period. This can be used to determine turnout switching and switch the data source for calculating the contact patch.

[0160] Preferably, the turnout condition monitoring system also includes a vibration sensor installed inside the device body 10, which is also connected to an external controller. By setting a reasonable vibration threshold, after acquiring vibration data from the vibration sensor, it is possible to determine whether the turnout is in a passing state. In the passing state, the data acquisition frequency of the monitoring module 30 in the system is increased to obtain more data. Through data statistical analysis technology, the dynamic characteristics of the turnout in the passing state (such as the change in the contact value caused by the impact of the wheels on the turnout) are monitored and analyzed, providing strong data support for road engineering management.

[0161] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0162] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0163] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0164] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0165] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, 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, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for monitoring the working condition of a turnout, characterized in that, The device is mounted on the sleeper; the device includes: The device body is mounted on the sleeper; A target assembly is disposed within the device body and is movably connected to the device body; the target assembly includes a first target and a second target arranged opposite to each other, the first target being fixedly connected to a switch rail via a first connector, and the second target being fixedly connected to a base rail via a second connector; The first target includes: a first part, parallel to the inner side of the switch rail; a second part, fixedly connected to the first part, the second part being fixedly connected to one end of the first connector, the other end of the first connector being fixedly connected to the switch rail, and the second part being fixedly connected to the switch rail through the first connector; The second target includes: a third part, parallel to the inner side of the basic rail; and a fourth part, fixedly connected to the third part, the fourth part being fixedly connected to one end of the second connector, the other end of the second connector being fixedly connected to the basic rail, and the fourth part being fixedly connected to the basic rail through the second connector. A monitoring module, disposed within the device body, faces the target assembly; used to monitor the distance between the target assembly and the monitoring module under train operating conditions; the monitoring module includes: a first monitoring fixture, facing the first target, used to monitor a first distance between the first target and the first monitoring fixture; a second monitoring fixture, facing the second target, used to monitor a second distance between the second target and the second monitoring fixture; the first monitoring fixture includes: a first acquisition board; a first laser ranging sensor, facing the first part, used to monitor the first distance from the first part to the first laser ranging sensor under train operating conditions; a second laser ranging sensor, facing... The second monitoring fixture is configured to monitor a second distance from the second unit to the second laser ranging sensor under train operating conditions. The first and second laser ranging sensors are integrated with the first acquisition board. The second monitoring fixture includes: a second acquisition board; a third laser ranging sensor, facing the third unit, for monitoring a third distance from the third unit to the third laser ranging sensor under train operating conditions; and a fourth laser ranging sensor, facing the fourth unit, for monitoring a fourth distance from the fourth unit to the fourth laser ranging sensor under train operating conditions. The third and fourth laser ranging sensors are integrated with the second acquisition board. A communication unit is located on one side of the device body. The communication unit is connected to the monitoring module and also communicates with an external controller.

2. The apparatus of claim 1, wherein, The device further includes: An eddy current sensor pre-module is located on one side of the first monitoring fixture within the device body, and the eddy current sensor pre-module is connected to the communication unit via a line. An eddy current sensor probe is connected to the circuit of the eddy current sensor front module. The eddy current sensor probe is located on the side of the first part away from the first monitoring fixture and is used to monitor the fifth distance from the eddy current sensor probe to the first part.

3. A turnout condition monitoring system, characterized in that The system includes the device as described in any one of claims 1-2 and an external controller, wherein the external controller is communicatively connected to the monitoring module and the communication unit; The system also includes a sleeper displacement monitoring device, which includes a foundation pile and a displacement monitoring mechanism. The foundation pile is buried in the center of the sleeper ground, and the displacement monitoring mechanism includes a laser sensor or an eddy current sensor. A metal target is installed on the side of the sleeper. There are two displacement monitoring mechanisms, each facing the target, to monitor the amount of sleeper displacement.

4. A method for monitoring the operating conditions of a turnout, characterized in that, Applied to the apparatus as described in any one of claims 1-3; the method comprises: Obtain current monitoring indicators and current temperature; Based on the current monitoring indicators and the current temperature, calculate the target indicator obtained after temperature compensation at the current temperature; For each of the target indicators, determine whether the target indicator meets the set requirements; If not, return a message indicating that the target indicator is not up to standard; The target indicators include at least one of the following: opening distance indicator, switch rail creep indicator, stock rail creep indicator, track gauge indicator, stock rail lateral displacement indicator, and contact amount indicator.

5. The method according to claim 4, characterized in that, The step of calculating the target index after temperature compensation at the current temperature based on the current monitoring index and the current temperature includes: Calculate using the following formula: = ； in, The target index is the temperature-compensated value; T is the current temperature. These are the current monitoring indicators; First preset temperature compensation coefficient, Second preset temperature compensation coefficient, The third preset temperature compensation coefficient is T0, where T0 is the standard temperature.

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