An online status monitoring system for turnout operation

Abstract

The present invention relates to an online state monitoring system for turnout operation, the system comprising a front-end sensor (1), a node unit (2), a base station (3), a server (4) and a host computer (5), wherein the front-end sensor (1) is arranged at a turnout traction point, and is connected to the host computer (5) through the node unit (2), the base station (3) and the server (4) in sequence. Compared with the prior art, the present invention has the following advantages: comprehensive online monitoring and display of important indicators such as turnout dynamics, turnout static state close contact amount, opening amount, creeping amount and turnout frame, prediction and judgment of the future operation state of the turnout, etc., turnout dynamic monitoring is the monitoring of important indicators such as turnout close contact amount, opening amount, creeping amount and turnout frame when a train passes through the turnout or the turnout is rotated in a fixed and reverse position; turnout static monitoring is the monitoring of the above-mentioned turnout state when no train passes and the turnout is not rotated.

Description

Technical Field

[0001] The invention relates to the field of turnout monitoring, and in particular to an online state monitoring system for turnout operation. Background Art

[0002] With the increase in railway speed and high-density driving sections, in order to ensure driving safety, the requirements for the quality of turnout operation and state stability are becoming increasingly higher.

[0003] Foreign objects between the turnout main rail and the point rail or malfunction of the switch machine may cause the main rail and the point rail to be too close together, leading to a turnout accident.

[0004] When a train passes through a turnout at high speed, the turnout (especially the point rail) will continue to be subjected to extremely large low-frequency and large-amplitude forces and high-frequency and small-amplitude forces. If the turnout status information cannot be obtained in a timely and effective manner, and the railway engineering and electrical departments cannot carry out joint repair operations to eliminate the defects in the early stage of turnout deterioration, the operating status of the switch machine and turnout will deteriorate rapidly, causing equipment damage and endangering driving safety.

[0005] At present, the monitoring of the operating status of turnouts in China mainly adopts the means of manual inspection, which is inefficient and difficult to provide systematic turnout health information. In recent years, with the advancement of electronic technology, the railway electrical department has introduced a turnout gap monitoring system, following the "Technical Specifications for Turnout Gap Monitoring System" of the China Railway Group (formerly China Railway Corporation), using mechanical contact or photoelectric detection sensors (such as cameras, grating fiber sensors) installed in the switch machine to identify the gap of the detection rod. The method of monitoring the gap of the switch machine detection rod has the following main problems: 1. The monitoring results are inaccurate, and false alarms often occur due to the complex on-site environment; 2. There are few monitoring parameters, and only one parameter, the gap value, can be measured, and the main parameter values ​​of the turnout operation status, such as the turnout close contact, opening amount, creeping amount, etc., cannot be comprehensively measured; 3. Indirect monitoring cannot directly reflect the above-mentioned application parameter values ​​of the turnout; 4. The monitoring frequency is low, and dynamic monitoring cannot be performed when the train passes the track.

[0006] In addition, for the method of using eddy current sensors to directly measure the operating status of turnouts, due to the short effective measurement distance of eddy current sensors (generally not exceeding 40mm), they can only measure parameters such as close contact and creep amount; in addition, in actual use, the protection level and stability of eddy current sensors cannot meet the requirements of long-term continuous and stable operation in the railway environment.

[0007] With the development of electronic communication technology, the system that directly monitors the working status of railway turnout equipment can dynamically / statically obtain important parameters of concern to railway electrical engineering in real time, provide early warning maintenance information, and enable railway operation and maintenance personnel to timely understand the turnout status and change trends, discover potential problems, and realize preventive status maintenance of turnout-related equipment. Summary of the invention

[0008] The purpose of the present invention is to provide an online status monitoring system for turnout operation in order to overcome the defects of the above-mentioned prior art.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] A turnout operation online status monitoring system comprises a front-end sensor, a node unit, a base station, a server and a host computer. The front-end sensor is arranged at the turnout traction point and is connected to the host computer via the node unit, the base station and the server in sequence.

[0011] Preferably, each of the switch traction points is provided with a group of front-end sensors and a node unit.

[0012] Preferably, when the turnout traction point is the first, the group of front-end sensors includes two piezoelectric acceleration sensors, three hysteresis-strictive displacement sensors, a temperature sensor and a humidity sensor; when the turnout traction point is the second or above, the group of front-end sensors at this point includes three hysteresis-strictive displacement sensors.

[0013] Preferably, two first magnetostrictive displacement sensors among the three magnetostrictive displacement sensors are installed vertically on the base rail, and are used to measure the distance between the switch point rail and the base rail, so as to realize dynamic and static monitoring of the close contact amount and opening amount between the two switch point rails and the base rail, and can also be used to measure the change data during the switch fixed and reverse position conversion process;

[0014] A second magnetostrictive displacement sensor among the three magnetostrictive displacement sensors is installed in the middle of the roadbed and is used to measure the distance between the two stock rails to achieve dynamic and static monitoring of the turnout frame.

[0015] Preferably, the vernier magnet of the magnetostrictive displacement sensor is fixed on the pointed rail and suspended above the sensor measuring rod to achieve a non-contact displacement measurement method.

[0016] Preferably, the piezoelectric acceleration sensor is arranged on the base rail in front of the point rail, and each base rail is respectively provided with a piezoelectric acceleration sensor, and the monitoring system is judged whether the train is passing through according to its output data, and the system automatically adjusts the sampling frequency of the hysteresis-strictive displacement sensor according to whether the train is passing through;

[0017] When the output data of the piezoelectric acceleration sensor exceeds the set threshold, it is determined that the train is passing through the monitoring system. At this time, the node unit speeds up the acquisition rate of the hysteresis expansion displacement sensor to achieve dynamic monitoring; when the output data of the piezoelectric acceleration sensor is lower than the set threshold, it is determined that no train is passing through the monitoring system. At this time, the node unit reduces the acquisition rate of the hysteresis expansion displacement sensor to reduce the amount of transmitted data.

[0018] Preferably, the temperature sensor and humidity sensor are arranged beside the track to measure the environmental data of the turnout.

[0019] Preferably, the node unit includes a power supply, a data acquisition circuit, a data processing circuit and a wireless transceiver circuit, the power supply is respectively connected to the front-end sensor, the data acquisition circuit, the data processing circuit and the wireless transceiver circuit, and the data processing circuit is respectively connected to the data acquisition circuit and the wireless transceiver circuit;

[0020] The data acquisition circuit is used to collect data from the connected front-end sensor; the data processing circuit adjusts the acquisition rate of the hysteresis-strictive displacement sensor according to the data of the piezoelectric acceleration sensor, and analyzes, compresses and converts the format of the collected data from the front-end sensor; the wireless transceiver circuit is used to send data to the base station to which it belongs.

[0021] Preferably, the base station receives data from subordinate node units within a few kilometers, and then sends the data to a server in a railway machine room via the operator's public network;

[0022] The server is used to store data, analyze the health status of the turnout, run web services, and provide users with user authentication, data query and data graphical display.

[0023] Preferably, the host computer provides a user login and management web page, provides users with different levels of user login according to railway bureaus, stations, sections, and workshops, real-time and historical data query and graphical display of turnouts, health status analysis and maintenance warning.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The system collects important parameters of the turnout operation status such as the close contact amount, opening amount, creeping amount, basic rail spacing, etc. in real time to realize comprehensive online monitoring of the turnout operation status.

[0026] 2. The system proposes for the first time the use of non-contact hysteresis telescopic displacement sensors to achieve continuous and uninterrupted monitoring of turnout operation data during static, dynamic and turnout conversion processes. Dynamic monitoring of turnouts is the monitoring of important indicators such as turnout adhesion, opening, creeping and turnout frame during the process of train passing through the turnout or turnout fixed and reversed rotation; static monitoring of turnouts is the monitoring of the above-mentioned turnout states when there is no train passing and the turnout is not rotating.

[0027] 3. The system determines whether the train has crossed the track based on the output value of the vibration sensor and adjusts the sensor sampling frequency accordingly.

[0028] 4. The system establishes a large database of railway turnout operation status, analyzes turnout monitoring data, summarizes the change rules of turnouts, and predicts and judges the future operation status of turnouts. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the equipment layout of the double-switch machine and double-traction point (double-machine and double-point) turnout field system of the present invention.

[0031] Figure 3 This is a diagram of the host computer monitoring interface of the present invention.

[0032] Among them, 1 is a front-end sensor, 2 is a node unit, 3 is a base station, 4 is a server, 5 is a host computer, 11 is a piezoelectric acceleration sensor, 12 is a hysteresis-strictive displacement sensor, 13 is a temperature sensor, 14 is a humidity sensor, 121 is a first hysteresis-strictive displacement sensor, and 122 is a second hysteresis-strictive displacement sensor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] like Figure 1 As shown, an online status monitoring system for turnout operation includes a front-end sensor 1, a node unit 2, a base station 3, a server 4 and a host computer 5. The front-end sensor 1 is arranged at the turnout traction point and is connected to the host computer 5 via the node unit 2, the base station 3 and the server 4 in sequence.

[0035] like Figure 2 As shown, each turnout traction point is provided with a group of front-end sensors 1 and a node unit 2.

[0036] When the turnout traction point is the first one, the group of front-end sensors 1 includes two piezoelectric acceleration sensors 11, three hysteresis-strictive displacement sensors 12, a temperature sensor 13 and a humidity sensor 14; when the turnout traction point is the second or above, the group of front-end sensors 1 at this point includes three hysteresis-strictive displacement sensors 12.

[0037] The two first magnetostrictive displacement sensors 121 of the three magnetostrictive displacement sensors 12 are installed vertically on the base rail, and are used to measure the distance between the switch point rail and the base rail, so as to realize dynamic and static monitoring of the close contact and opening amount between the two switch point rails and the base rail, and can also be used to measure the change data during the switch fixed and reverse position conversion process.

[0038] The vernier magnet of the magnetostrictive displacement sensor 12 is fixed on the pointed rail and suspended above the sensor measuring rod to realize a non-contact displacement measurement method.

[0039] The second magnetostrictive displacement sensor 122 is installed in the middle of the roadbed to measure the distance between the two stock rails and realize dynamic and static monitoring of the turnout frame.

[0040] The piezoelectric acceleration sensor 11 is arranged on the base rail in front of the point rail, and each base rail is respectively provided with a piezoelectric acceleration sensor 11. The monitoring system determines whether a train is passing through the monitoring system according to its output data. According to whether a train is passing through, the system automatically adjusts the sampling frequency of the hysteresis-strictive displacement sensor 12.

[0041] When the output data of the piezoelectric acceleration sensor 11 exceeds the set threshold, it is determined that the train is passing through the monitoring system. At this time, the node unit 2 speeds up the acquisition rate of the hysteresis striction displacement sensor 12 to achieve dynamic monitoring; when the output data of the piezoelectric acceleration sensor 11 is lower than the set threshold, it is determined that no train is passing through the monitoring system. At this time, the node unit 2 reduces the acquisition rate of the hysteresis striction displacement sensor 12 to reduce the amount of transmitted data.

[0042] The temperature sensor 13 and humidity sensor 14 are arranged beside the track to measure the environmental data of the turnout.

[0043] The node unit 2 includes a power supply, data acquisition, data processing and wireless transceiver. The power supply is used to supply power to the connected front-end sensor 1 and the node unit 2; the data acquisition is used to collect data from the connected front-end sensor 1; the data processing adjusts the acquisition rate of the hysteresis striction displacement sensor 12 according to the data of the piezoelectric acceleration sensor 11, and analyzes, compresses and converts the format of the collected data of the front-end sensor 1; the wireless transceiver is used to send data to the base station 3 to which it belongs.

[0044] The base station 3 receives data from subordinate node units 2 within a few kilometers, and then sends the data to the server 4 in the railway department's computer room through the operator's public network.

[0045] The server 4 is used to store data, analyze the health status of the turnout, run web services, and provide users with user authentication, data query and data graphical display.

[0046] like Figure 3 As shown, the host computer 5 provides user login and management web pages, provides users with different levels of user login according to railway bureaus, stations, sections, and workshops, real-time and historical data query and graphical display of turnouts, health status analysis and maintenance warnings.

[0047] There are many types of railway turnouts, such as three-switch machine three-traction point (three-machine three-point) and multi-machine multi-point traction turnouts. The system of the present invention is applicable to all these types of turnouts.

[0048] If the distance between multiple groups of front-end sensors is close enough, the front-end sensors can be connected to the data acquisition part of the same node unit and share one node unit, thereby reducing the number of system devices and reducing system costs.

[0049] For turnout types with more than two traction points, the equipment layout refers to the dual-machine dual-point equipment layout, that is, at the subsequent traction points, only one hysteresis telescopic displacement sensor for measuring the opening amount and the close contact amount needs to be arranged on each of the two moving rails, and a hysteresis telescopic displacement sensor for measuring the basic rail spacing needs to be arranged in the middle of the roadbed. There is no need to arrange temperature and humidity sensors and piezoelectric acceleration sensors.

[0050] The magnetostrictive displacement sensor in the present invention has good temperature compensation performance and stability, and can ensure long-term stable operation after the initial installation and debugging, without the need for recalibration. Maintenance personnel can use special tools such as a ruler and a vernier caliper to measure the values ​​of the turnout's close fit and opening, and compare them with the output value of the displacement sensor. If the deviation exceeds the allowable range, recalibration is required. During calibration, the output voltage of the displacement sensor is recorded at a certain distance. After the measurement is completed, the actual distance and the corresponding output voltage value of the displacement sensor are input into the calibration software to complete the calibration.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A turnout operation online status monitoring system, characterized in that: The system comprises a front-end sensor (1), a node unit (2), a base station (3), a server (4) and a host computer (5); the front-end sensor (1) is arranged at a turnout traction point and is connected to the host computer (5) via the node unit (2), the base station (3) and the server (4) in sequence; Each of the turnout traction points is provided with a group of front-end sensors (1) and a node unit (2); When the turnout traction point is the first one, the group of front-end sensors (1) includes two piezoelectric acceleration sensors (11), three hysteresis-strictive displacement sensors (12), a temperature sensor (13) and a humidity sensor (14); when the turnout traction point is the second one or more, the group of front-end sensors (1) at the point includes three hysteresis-strictive displacement sensors (12); Two first magnetostrictive displacement sensors (121) of the three magnetostrictive displacement sensors (12) are installed vertically on the base rail, and are used to measure the distance between the switch point rail and the base rail, so as to realize dynamic and static monitoring of the close contact amount and opening amount between the two switch point rails and the base rail, and are also used to measure the change data in the process of the switch fixed and reverse position conversion; A second magnetostrictive displacement sensor (122) among the three magnetostrictive displacement sensors (12) is installed in the middle of the roadbed and is used to measure the distance between the two base rails to achieve dynamic and static monitoring of the turnout frame; The vernier magnet of the hysteresis-extension displacement sensor (12) is fixed on the pointed rail and suspended above the sensor measuring rod, thereby realizing a non-contact displacement measurement method; The piezoelectric acceleration sensor (11) is arranged on the base rail in front of the point rail, and each base rail is provided with a piezoelectric acceleration sensor (11). The monitoring system is used to determine whether a train is passing through the monitoring system based on its output data. According to whether the train is passing through the switch, the system automatically adjusts the sampling frequency of the hysteresis-strictive displacement sensor (12); When the output data of the piezoelectric acceleration sensor (11) exceeds a set threshold value, it is determined that a train is passing through the monitoring system. At this time, the node unit (2) speeds up the acquisition rate of the hysteresis-strictive displacement sensor (12) to achieve dynamic monitoring; when the output data of the piezoelectric acceleration sensor (11) is lower than the set threshold value, it is determined that no train is passing through the monitoring system. At this time, the node unit (2) reduces the acquisition rate of the hysteresis-strictive displacement sensor (12) to reduce the amount of transmitted data.

2. The on-line status monitoring system for turnout operation according to claim 1 is characterized in that: The temperature sensor (13) and humidity sensor (14) are arranged beside the track and are used to measure the environmental data of the turnout.

3. The on-line status monitoring system for turnout operation according to claim 1 is characterized in that: The node unit (2) comprises a power supply, a data acquisition circuit, a data processing circuit and a wireless transceiver circuit, wherein the power supply is respectively connected to the front-end sensor (1), the data acquisition circuit, the data processing circuit and the wireless transceiver circuit, and the data processing circuit is respectively connected to the data acquisition circuit and the wireless transceiver circuit; The data acquisition circuit is used to collect data from a connected front-end sensor (1); the data processing circuit adjusts the acquisition rate of the hysteresis-strictive displacement sensor (12) according to the data of the piezoelectric acceleration sensor (11), and analyzes, compresses and converts the format of the collected data of the front-end sensor (1); and the wireless transceiver circuit is used to send the data to the base station (3) to which it belongs.

4. The on-line status monitoring system for turnout operation according to claim 1 is characterized in that: The base station (3) receives data from subordinate node units (2) within a few kilometers, and then sends the data to a server (4) in a railway machine room via the operator's public network; The server (4) is used to store data, analyze the health status of the turnout, run web page services, and provide users with user authentication, data query and data graphical display.

5. The on-line status monitoring system for turnout operation according to claim 1 is characterized in that: The host computer (5) provides a user login and management web page, provides users with different levels of user login according to railway bureau, station, section, and workshop, real-time and historical data query and graphical display of turnouts, health status analysis and maintenance warning.

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