Contact line tension confirmation system and early warning method

Abstract

The invention discloses a contact line tension confirmation system and an early warning method, and relates to the technical field of railway catenaries, and the system comprises a first monitoring camera which obtains the initial force time information t1 of a target contact line endpoint A and the position information of the target contact line endpoint A; the second monitoring camera is used for acquiring fluctuation time information t2 of a target contact line end point B and position information of the target contact line end point B; and the data processing server is used for receiving real-time data of the first monitoring camera and the second monitoring camera and calculating the tension T of the target contact line. The tension of the target contact line is determined by obtaining the fluctuation information of the target contact line, the problems that a tension meter cannot reflect the actual state of the contact line in the operation process in real time and potential safety hazards exist in manual operation are solved, the change of the tension value of the contact line in the operation process is monitored, and meanwhile the monitoring precision is high.

Description

Technical Field

[0001] The present invention relates to the technical field of railway contact lines, and in particular to a contact line tension confirmation system and an early warning method. Background Art

[0002] To ensure the safe operation of electrified railways, the contact wire and the locomotive pantograph must maintain stable and uninterrupted contact and current collection. Therefore, the contact wire tension must be kept constant. Conventional measurements of contact wire tension in electrified railway catenary systems are typically performed using a force gauge, an instrument that measures the force applied to an object and converts the measured force into an electrical signal.

[0003] However, when using a dynamometer to directly measure the tension of the contact line, the dynamometer needs to be fixed on the contact line, and then the tension on the contact line is measured by the dynamometer. On the one hand, it cannot reflect the actual state of the contact line during operation in real time, and on the other hand, manual operation is required, so there are certain safety hazards. Summary of the Invention

[0004] In view of this, the present application provides a contact line tension confirmation system and an early warning method to replace the existing dynamometer to directly measure the contact line tension.

[0005] A first aspect of the present application provides a contact line tension confirmation system, comprising: The first monitoring camera obtains the initial force time information t1 of the target contact line endpoint A and the position information of the target contact line endpoint A, and wakes up the second monitoring camera to start; the second monitoring camera obtains the fluctuation time information t2 of the target contact line endpoint B and the position information of the target contact line endpoint B; the power supply module is respectively installed on the two contact network supports of a complete anchor section to supply power to the first monitoring camera and the second monitoring camera; the transmission module transmits the real-time data of the first monitoring camera and the second monitoring camera to the data processing server; the data processing server receives the real-time data of the first monitoring camera and the second monitoring camera, and calculates the target contact line tension T; The calculation of the target contact line tension T includes: Obtain the initial force time information t1 of endpoint A and the fluctuation time information t2 of endpoint B, calculate the time difference Δt, obtain the position information of endpoint A and endpoint B, and calculate the adjacent distance L; obtain the wave travel speed V through the time difference Δt and the adjacent distance L; and the wave travel speed V is equal to the fluctuation propagation speed C of the target contact line; given the fluctuation propagation speed C and the target contact line density P, the value of the target contact line tension T can be directly obtained.

[0006] The second aspect of the present application provides an early warning method, including: a target contact line tension threshold interval, judging whether the value of the target contact line tension T obtained in a contact line tension confirmation system provided in the first aspect of the present application exceeds the target contact line tension threshold interval, and if it exceeds the target contact line tension threshold interval, starting an alarm program through a data processing server.

[0007] After the alarm is reported, the staff can handle it further.

[0008] The third aspect of the present application provides an electronic device comprising: one or more processors, a memory, and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the electronic device, enable the electronic device to execute a contact line tension confirmation system as provided in the first aspect of the present application.

[0009] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute a contact line tension confirmation system method as provided in the first aspect of the present application.

[0010] Compared with the existing technology, the present application has the following advantages: By obtaining the fluctuation information of the target contact line to determine the tension of the target contact line, the technical problems of the force meter being unable to reflect the actual status of the contact line during operation in real time and the safety hazards of manual operation are solved. This realizes the technical effect of monitoring the changes in the tension value of the contact line during operation and monitoring with high precision. DETAILED DESCRIPTION

[0011] The following will clearly and completely describe the technical solutions in the embodiments of this application in combination with the prior art. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0012] In this application, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0013] Example 1 As can be seen from the above background technology, in the prior art, a force gauge is usually used to directly measure the tension of the contact wire. The force gauge needs to be fixed to the contact wire and then the tension on the contact wire is measured by the force gauge. On the one hand, it cannot reflect the actual state of the contact wire during operation in real time, and on the other hand, manual operation is required, which poses certain safety risks. For example: Patent 1, application number: 201320854397.1, patent name: measuring sensor device and contact network tension measurement system, introduces a measuring sensor device and a contact network tension measurement system, by installing a specific tension sensor at the anchor position of the contact line to directly measure the contact line tension and transmit information through a self-established communication system; Patent 2, application number: 201810657225.2, patent name: a railway contact network bearing cable contact line tension online monitoring and early warning method and method, introduces a contact line tension online monitoring and early warning method, by controlling the side pressure tension sensor installed on the contact line to periodically collect tension values, thereby reducing the amount of business data wireless transmission and the system loss of the tension collection device; Patent 3, application number: 201610594244.6, patent name: a railway contact network dynamic monitoring device, introduces a contact network dynamic monitoring system, using side pressure tension sensors to periodically collect tension values, thereby reducing the amount of business data wireless transmission and the system loss of the tension collection device; Patent 3, application number: 201610594244.6, patent name: a railway contact network dynamic monitoring device, introduces a contact network dynamic monitoring system, using side pressure tension sensors to periodically collect tension values, thereby reducing the amount of business data wireless transmission and the system loss of the tension collection device; Patent 3, application number: 201610594244.6, patent name: a railway contact network dynamic monitoring device, introduces a contact network dynamic monitoring system, using side pressure tension sensors to periodically collect tension values, thereby reducing the amount of business data wireless transmission and the system loss of the tension collection device The "three-point bending method" of the compression tension sensor measures the tension, and then transmits it to the signal collector by wireless communication through the signal collector, thereby improving the measurement accuracy; Patent 4, application number: 201921982703.3, patent name: An online monitoring device for anchor section tension that can accurately measure, introduces an online monitoring device for anchor section tension, which converts the contact line tension change into the displacement change of the weight by installing a weight through a pulley set on one side of the contact line, and uses a laser rangefinder to measure the drop distance of the weight caused by tension compensation to measure the contact line tension in real time.

[0014] Among them, Patents 1, 2, and 3, compared with traditional contact line tension measurement methods, can measure contact line tension in real time, but in essence they still measure tension directly through tension sensors, which is similar to traditional methods. Such equipment is inevitably limited by the properties of the tension sensor itself: the measurement accuracy of the tension sensor may be affected by various factors such as temperature, pressure, humidity, vibration, and corrosion. These factors may not only cause deviations in the measurement results, but may also shorten the service life of the sensor. In addition, in order to ensure the measurement accuracy of the tension sensor, the design of its elastic element, housing, diaphragm, upper pressure head, lower pressure pad and other components must ensure that there is no performance fluctuation or very little performance fluctuation in the structure after loading. Due to the large contact line tension, this is also a test for the production and design of related sensors.

[0015] Although Patent 4 does not use a tension sensor and can measure the contact line tension in real time, considering the large mass of the weight (which can stably pull up the contact line and the related pulley group of at least one anchor section) and the complexity of the pulley group of the entire system, actual installation may be inconvenient; the installation and coordination of a large number of mechanical equipment inevitably cause associated errors; at the same time, the external equipment is greatly affected by the environment. For example, the pulley group may deviate due to strong winds or the weight may be corroded and damaged due to environmental changes, which will directly affect the measurement results. In addition, how to ensure that the laser rangefinder can continue to work without being blocked in a complex contact network environment is also a problem. In short, the overall operability of the solutions disclosed in the prior art is not strong.

[0016] The solution described in this application can solve the above problems, specifically including: This solution provides a contact line tension confirmation system, comprising: a first monitoring camera, which obtains initial force time information t1 and position information of the target contact line endpoint A, and wakes up a second monitoring camera to start; a second monitoring camera, which obtains fluctuation time information t2 and position information of the target contact line endpoint B; a power supply module, which is respectively installed on two contact network supports of a complete anchor section, and supplies power to the first monitoring camera and the second monitoring camera; a transmission module, which transmits real-time data from the first monitoring camera and the second monitoring camera to a data processing server; and a data processing server, which receives real-time data from the first monitoring camera and the second monitoring camera and calculates the target contact line tension T. The calculation of the target contact line tension T includes: Obtain the initial force time information t1 of endpoint A and the fluctuation time information t2 of endpoint B, calculate the time difference Δt, obtain the position information of endpoint A and endpoint B, and calculate the adjacent distance L; obtain the wave travel speed V through the time difference Δt and the adjacent distance L; and the wave travel speed V is equal to the fluctuation propagation speed C of the target contact line; knowing the fluctuation propagation speed C and the target contact line density P, the value of the target contact line tension T can be obtained.

[0017] Through the above system, it can be concluded that in actual operation, only two monitoring cameras need to be set at the two end points of the target contact line, and the two monitoring cameras are linked. Only when one monitoring camera obtains the initial force, the other monitoring camera is turned on. The first monitoring camera obtains the initial force time information t1 and the position information of the target contact line endpoint A, and wakes up the second monitoring camera to start up in the following manner: the image information of the target contact line endpoint A obtained by the first monitoring camera is analyzed, and when the feature point in the image information undergoes vertical displacement, it is determined that the contact line has received the initial force and generated fluctuations, the initial force time information t1 of the target contact line endpoint A is recorded, and the position information of the target contact line endpoint A is extracted for subsequent calculation; Similarly, the second monitoring camera obtains the fluctuation time information t2 and the position information of the target contact line endpoint B, which are consistent with the above. The fluctuation of the contact line is determined by the vertical displacement of the feature point in the image information, and the fluctuation time information t2 of the endpoint B is recorded. The wave velocity V is obtained by the time difference Δt and the adjacent distance L. The wave velocity V is equal to the wave propagation velocity C of the target contact line. If the wave propagation velocity C and the target contact line density P are known, the target contact line tension T can be directly obtained. It should be noted that the target contact line density P is a fixed value. All contact lines will have this value when they appear. In addition, if the wave propagation velocity C and the target contact line density P are known, the target contact line tension T can be directly obtained. This algorithm is an existing technology, for example: "Analysis of Local Force Balance of Pantograph-Category System", Han Juntao, "China Master's Electronic Journal of Engineering Technology II The derivation process is detailed in the main text pages 21-26 of the paper published in December 2018; although the derivation process of this paper is: knowing the value of the target contact line tension T and the value of the target contact line density P, calculating the wave propagation speed C; but due to the verification and back-deduction of mathematical formulas, the known conditions and unknown conditions can also be interchanged. Therefore, this paper does not repeat the derivation of the existing technology. The detailed back-deduction process and the simulation verification process after the mathematical back-deduction can refer to Patent 5, application number: 2024106346810, patent name: A contact line tension monitoring method, system, device and storage medium.

[0018] The overall solution does not use tension sensors or similar devices, avoiding the shortcomings of traditional methods and also measuring the tension of the contact line in real time. Furthermore, because the tension of the contact line is directly related to the wave propagation on the contact line, the confirmation method provided in this application measures the contact force by measuring the fluctuation changes of the contact line. This can avoid data inaccuracies caused by intermediate information conversion or the associated errors caused by the coordination of multiple devices. The measurement process does not rely on changes in the external environment and is less affected by the external environment, resulting in high accuracy.

[0019] The proposed measurement system also includes a limited number of devices, is simple to install, and can be installed on nearly any catenary support, ensuring high operability during installation. The device is detachable and offers flexible measurement capabilities, allowing a single set of equipment to serve multiple railway lines in a short period of time. Compared to some large measurement systems that require complex assembly and calibration before commissioning and are difficult to disassemble, the proposed system is highly competitive in the market.

[0020] The structure involved in this application is simple and easy to disassemble. Even if some parts have problems, they are easy to check and replace, and maintenance is simple. The overall solution has almost no mechanical devices, so there are no defects caused by material loss or fatigue damage, so the reliability is high. Even if problems occur, there are few parts that need to be repaired or replaced, and there will be no collateral damage that is prone to complex mechanical systems, and the maintenance cost is low.

[0021] As an optional technical solution, the first monitoring camera and the second monitoring camera both use high-speed cameras, the first monitoring camera obtains the initial force time information t1 of the target contact line endpoint A and the position information of the target contact line endpoint A, and wakes up the second monitoring camera to start; the second monitoring camera obtains the fluctuation time information t2 of the target contact line endpoint B and the position information of the target contact line endpoint B; the specific process includes: the target contact line is a complete anchor section, the first monitoring camera is installed on the first contact network bracket in the anchor section, and the image information of the target contact line endpoint A is monitored in real time by the edge monitoring module, and whether there is fluctuation information is further determined by the image information, and whether it should be recorded as the initial force time information t1; the second monitoring camera is installed on the second contact network bracket in the anchor section, and is woken up by the first monitoring camera, and the image information of the target contact line endpoint B is monitored in real time by the edge monitoring module, and whether there is fluctuation information is further determined by the image information, and whether it should be recorded as the fluctuation time information t2; Edge detection modules can be built into high-speed cameras. For example, Photonfocus high-speed cameras have built-in operator convolution capabilities that can be applied to edge extraction. Furthermore, Hyperson black-and-white high-speed industrial cameras also have edge burr detection capabilities, demonstrating that edge detection modules can be built into high-speed cameras and used for specific inspection tasks.

[0022] Furthermore, the advantages of having the edge detection module built into the high-speed camera are: Improved detection efficiency: The built-in edge detection module can directly process image data captured by the camera, reducing the time delay of data transmission and processing, thereby improving overall detection efficiency.

[0023] Enhanced detection accuracy: The built-in edge detection module is usually optimized to provide higher detection accuracy and stability, suitable for complex industrial detection environments.

[0024] Simplified system design: Built-in modules reduce the need to connect external devices, simplify the overall system design, and reduce system complexity and maintenance costs.

[0025] As an optional technical solution, the position information of endpoint A and endpoint B of the target contact line are both preset information, and the adjacent distance L between endpoints A and B can be directly obtained. A distance compensation module is also included. The distance compensation module directly measures the relative displacement of the two ends of the anchor segment of the target contact line through a displacement sensor and calculates the actual length of the contact line in real time; It should be noted that when the entire monitoring equipment is pre-installed, the position information of endpoint A and endpoint B, that is, the adjacent distance L, is directly entered, and the data can be directly retrieved during later use; and the conventional means of the railway system include a distance compensation module. This technical solution does not provide any protection for the distance compensation module, but only applies the existing technology to this solution, so the existing technology will not be described in detail.

[0026] As an optional technical solution, the initial force in the initial force time information t1 of the target contact line endpoint A is generated by a moving train or manually raising the target contact line upwards; It should be noted that the contact line tension confirmation system designed in this solution can be applied to both empty track state and non-empty track state; The empty track state is when no train passes through. An initial force can be generated by manually raising the target contact line upwards, which is used for on-site contact line tension monitoring. The non-empty track state is when a train passes by. Due to the physical contact between the train and the contact wire, an initial force is generated, which is used to monitor the on-site contact wire tension when the train is running.

[0027] As an optional technical solution, it also includes: A power supply module is installed on the two contact network brackets to supply power to the first monitoring camera and the second monitoring camera; a transmission module transmits the real-time data of the first monitoring camera and the second monitoring camera to a data processing server; the data processing server receives the real-time data of the first monitoring camera and the second monitoring camera and calculates the value of the target contact line tension T; It should be emphasized here that although the entire solution is full of efficiency, convenience and simplicity, and can solve a major problem of existing technology through simple equipment installation and uncomplicated data transmission, this technological reform has solved the railway industry's confusion for many years at the application level and is a breakthrough in a huge technological barrier.

[0028] Example 2 Based on a contact line tension confirmation system provided in Example 1 of the present application, correspondingly, Example 2 of the present application also provides a contact line tension confirmation system, which includes a target contact line tension threshold interval, and determines whether the value of the target contact line tension T obtained in the contact line tension confirmation system provided in Example 1 of the present application exceeds the target contact line tension threshold interval. If it exceeds the target contact line tension threshold interval, an alarm program is initiated through the data processing server.

[0029] Example 3 Embodiment 3 of the present application provides an electronic device, one or more processors, a memory, and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions. When the instructions are executed by the electronic device, the electronic device executes a contact line tension confirmation system proposed in the present application.

[0030] Through the description of the above implementation methods, it can be seen that those skilled in the art can clearly understand that all or part of the steps in the above implementation method can be implemented by means of software plus the necessary general hardware platform. Based on this understanding, the above computer program product may include but is not limited to an APP.

[0031] Example 4 A fourth embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. The computer-executable instructions are used to execute a contact line tension confirmation system proposed in the present application.

[0032] In the several embodiments provided herein, any function, if implemented as a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, certain technical solutions of the present invention, or portions that contribute to the prior art, or portions of such solutions, may be embodied in the form of software products as described below.

[0033] Continuing from the above, the aforementioned device / terminal may be a computer device, and the hardware structure of the computer device may further specifically include: at least one processor, at least one communication interface, at least one memory, and at least one communication bus; the processor, communication interface, and memory may all communicate with each other via the communication bus. The processor may be a central processing unit (CPU), a DSP, a microcontroller, or a digital signal processor, and may also include a GPU, an embedded neural network processor (NPU), and an image signal processor (ISP). The processor may also include a specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. Furthermore, the processor may have the function of operating one or more software programs, which may be stored in a storage medium such as a memory. The aforementioned memory / storage medium may include: non-volatile memory, such as a non-removable disk, a USB flash drive, a mobile hard disk, an optical disk, etc., as well as read-only memory (ROM), random access memory (RAM), etc.

[0034] Those skilled in the art will appreciate that the various modules, units, and method steps described in the embodiments disclosed in this specification can be implemented using a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0035] Furthermore, the modules and units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple locations, such as nodes in a system network. Part or all of the modules and units may be selected based on actual needs to achieve the objectives of the above-described embodiments. Those skilled in the art can understand and implement the above-described embodiments without inventive effort.

[0036] Finally, it should be understood that the embodiments described in this specification are intended only to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly described and illustrated in this specification.

Claims

1. A contact line tension confirmation system, characterized in that: include: The first monitoring camera obtains the initial force time information t1 and the position information of the target contact line endpoint A, and wakes up the second monitoring camera to start; The second monitoring camera obtains the fluctuation time information t2 and the position information of the target contact line endpoint B; A power supply module is installed on two contact network supports of a complete anchor section to supply power to the first monitoring camera and the second monitoring camera; A transmission module, transmitting the real-time data of the first monitoring camera and the second monitoring camera to a data processing server; A data processing server receives real-time data from the first monitoring camera and the second monitoring camera, and calculates a target contact line tension T; The calculation of the target contact line tension T includes: Get the initial force time information t1 of endpoint A and the fluctuation time information t2 of endpoint B, and calculate the time difference Δt. Obtain the location information of endpoint A and endpoint B, and calculate the adjacent distance L; The wave speed V is obtained by the time difference Δt and the adjacent distance L; and the wave speed V is equal to the wave propagation speed C of the target contact line; Knowing the wave propagation velocity C and the target contact line density P, the value of the target contact line tension T can be obtained.

2. A contact line tension confirmation system according to claim 1, characterized in that: The first monitoring camera obtains the initial force time information t1 and the position information of the target contact line endpoint A, and wakes up the second monitoring camera to start; The second monitoring camera obtains the fluctuation time information t2 and the position information of the target contact line endpoint B; The specific process includes: The target contact line is a complete anchor section, and the first monitoring camera is installed on the first contact network bracket within the anchor section, and monitors the image information of the target contact line endpoint A in real time through the edge monitoring module; the second monitoring camera is installed on the second contact network bracket within the anchor section, is awakened by the first monitoring camera, and monitors the image information of the target contact line endpoint B in real time through the edge monitoring module.

3. A contact line tension confirmation system according to claim 2, characterized in that: The first monitoring camera and the second monitoring camera are both high-speed cameras.

4. A contact line tension confirmation system according to claim 1, characterized in that: The position information of the target contact line endpoint A and the position information of the endpoint B are both preset information, and the adjacent distance L between the endpoint A and the endpoint B can be directly obtained.

5. A contact line tension confirmation system according to claim 4, characterized in that: It also includes a distance compensation module, which directly measures the relative displacement of the two ends of the target contact line anchor segment through a displacement sensor and calculates the actual length of the contact line in real time.

6. A contact line tension confirmation system according to claim 1, characterized in that: The initial force in the initial force time information t1 of the target contact line endpoint A is generated by a moving train or manually lifting the target contact line upward.

7. An early warning method, characterized in that: The method includes a target contact line tension threshold interval, and determines whether the value of the target contact line tension T obtained in a contact line tension confirmation system described in any one of claims 1 to 6 exceeds the target contact line tension threshold interval. If it exceeds the target contact line tension threshold interval, an alarm program is started through a data processing server.

8. An electronic device, characterized in that: include: One or more processors, a memory, and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the electronic device, enable the electronic device to execute a contact line tension confirmation system as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute a contact line tension confirmation system according to any one of claims 1 to 6.