Vehicle-mounted detection system for performance of automatic neutral section passing magnetic steel of ordinary-speed railway

Abstract

An automatic neutral section passing magnetic steel performance vehicle-mounted detection system for a common-speed railway comprises magnetic induction intensity detection modules, a high-definition imaging module, a comprehensive positioning module, an environment illumination compensation module, a control and signal acquisition module and a client side, the magnetic induction intensity detection modules are installed on the two sides of the inclined lower portion of a vehicle and are installed on the left side and the right side of the vehicle in a cantilever mode, and the high-definition imaging module is installed on the client side. Magnetic flux detection is carried out on the geomagnetic sensors on the two sides of the track; the high-definition imaging modules are installed on the two sides of the inclined lower portion of a vehicle, are installed in a cantilever mode, are arranged on the left and right and are used for photographing the appearances of the geomagnetic sensors on the two sides of a track. The detection system is modularly modified and assembled based on a detection vehicle, an operation vehicle and other rail vehicles, judgment is carried out through magnetic induction and image recognition, faults and performance problems of the geomagnetic inductor installed on a sleeper can be found in time, and a reliable basis is provided for maintenance of the geomagnetic inductor.

Description

Technical Field

[0001] The utility model relates to the technical field of on-board detection of magnetic steel performance for automatic over-phase separation on conventional railways. Background Art

[0002] As a core component of the automatic over-phase magnet system, the catenary automatic over-phase magnet equipment is installed outdoors on railroad sleepers, subject to harsh operating conditions. In such environments, the geomagnetic sensors (also known as magnets) are susceptible to damage and loss. Even under normal conditions, the magnet's magnetic properties weaken over time and due to environmental factors, causing the automatic over-phase function of electric locomotives to fail. If a locomotive enters a de-energized area while energized, it could cause a pantograph-catenary accident, seriously threatening railway operation and equipment safety. Therefore, to ensure the proper operation of the automatic over-phase magnet system and the safety of railway transportation, regular inspection of the geomagnetic sensors on the sleepers is necessary.

[0003] The working principle of the geomagnetic sensor can be found in the technical file disclosed in CN201510730392.1.

[0004] According to the "Rules for Operation and Maintenance of Ordinary Railway Contact Network", the power supply workshop needs to conduct periodic inspections every 6 months. Currently, the magnetic flux of the magnet is measured manually on site using a Tesla meter point by point.

[0005] The point-by-point measurement method of the Tesla meter has the disadvantage of large workload, which places a heavy burden on the site.

[0006] In order to solve the drawbacks of manual detection, some units have developed automatic detection devices. The core module of this automatic detection device is the magnetic induction intensity detection module, that is, by installing the magnetic induction intensity detection module on the detection vehicle, the magnetic flux of the magnet is detected to see if it meets the standard. This single detection method obtains data, and its technical accuracy cannot meet the needs of the site. Due to the large error, it also causes a lot of review workload on site. At the same time, there are cases where the magnet body is damaged by cracks, bulges, etc., but the magnetic flux of the magnet can still meet the standard requirement of not less than 36Gs in a short time. However, the magnetic flux of the magnet will drop sharply during the test cycle, resulting in the failure of the automatic over-phase function of the electric locomotive or the serious consequence of vibration and shedding of the equipment.

[0007] Based on the above introduction, new technical means are needed to overcome the detection defects of single magnetic flux detection. Utility Model Content

[0008] In order to address the deficiencies of the existing technology, the utility model provides an on-board detection system for automatic over-phase magnetic steel performance on conventional railways, which is used to address the drawback of the existing technology that only detects whether the magnetic flux of the geomagnetic sensor meets the standard but cannot detect the appearance damage of the geomagnetic sensor. By introducing appearance detection data, the accuracy of detection is improved.

[0009] The technical solution adopted by the utility model to solve its technical problems is:

[0010] The on-board detection system for the performance of automatic over-phase magnetic steel for conventional railways includes a magnetic induction intensity detection module, a high-definition imaging module, an integrated positioning module, an ambient light compensation module, a control and signal acquisition module, and a client. Its features include:

[0011] The magnetic induction intensity detection module is installed on both sides of the vehicle at an angle below, with one module installed on each side, to detect the magnetic flux of the geomagnetic sensors on both sides of the track.

[0012] The high-definition imaging modules are installed on both sides of the vehicle, cantilevered, one on each side, to take pictures of the appearance of the geomagnetic sensors on both sides of the track;

[0013] The ambient light compensation module is installed at the high-definition imaging module and paired with it to perform light compensation on the photo point;

[0014] The integrated positioning module includes a vehicle-mounted speed sensor and a GNSS antenna. The vehicle-mounted speed sensor is installed at the axle and obtains vehicle speed information. The GNSS antenna is installed under the vehicle to obtain the vehicle's latitude and longitude information and the specific mileage corresponding to the basic data of the overhead line.

[0015] The magnetic induction intensity detection module, high-definition imaging module, comprehensive positioning module, and ambient light compensation module are respectively connected to the control and signal acquisition module through high-speed communication transmission lines, and the control and signal acquisition module is electrically connected to the client.

[0016] Furthermore, the control and signal acquisition module is an airborne industrial computer.

[0017] Furthermore, the client is a PC or a smart phone.

[0018] Furthermore, the high-definition imaging module is an industrial camera, and the imaging quality of the industrial camera satisfies the requirement of ≦1mm in the horizontal direction and ≦1mm in the vertical direction.

[0019] Furthermore, the high-definition imaging module is installed on the bottom crossbeam of the vehicle.

[0020] Furthermore, the magnetic induction intensity detection module is installed on the bottom cross beam of the vehicle.

[0021] Furthermore, the magnetic induction intensity detection module is arranged in front of the high-definition imaging module.

[0022] Furthermore, the ambient light compensation module is an LED light source.

[0023] Furthermore, the vehicle is a track inspection vehicle or a work vehicle.

[0024] Furthermore, the control and signal acquisition module and the client are located inside the vehicle.

[0025] The beneficial effects of the utility model are:

[0026] This detection system, based on modular modifications and assembly of inspection vehicles, work vehicles, and other rail vehicles, uses magnetic induction (magnetic flux) and image recognition to promptly identify faults and performance issues in geomagnetic sensors installed on rail sleepers, providing a reliable basis for geomagnetic sensor maintenance and upkeep. This detection ensures the proper functioning and service life of geomagnetic sensors, reduces safety risks associated with geomagnetic sensor failures, and provides a strong guarantee for the safe and stable operation of railway transportation.

[0027] This test uses dual indicators of magnetic flux and appearance, has a safety redundant design, and has higher safety performance. It can promptly detect substandard geomagnetic sensors and organize personnel to effectively replace them, thereby improving the level of maintenance.

[0028] The inspection system is based on modular transformation and assembly of inspection vehicles, work vehicles and other rail vehicles, operates on-board, and works uninterruptedly around the clock, reducing the time and cost of manual inspection, improving inspection work efficiency, and effectively reducing manual maintenance costs and equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the logic block diagram of the detection system.

[0030] Figure 2 This is a diagram of the installation status of the high-definition imaging module on the bottom of the vehicle.

[0031] Figure 3 This is a diagram of the installation status of the magnetic induction intensity detection module on the bottom of the vehicle.

[0032] Figure 4 A logical block diagram for data processing, storage, and display in the client.

[0033] Figure 5 This is a flow chart for processing magnetic induction, image and other data.

[0034] Figure 6 Demonstrates the scanning process of an industrial camera.

[0035] Figure 7 It is the client's intelligent analysis and display interface for magnetic flux detection of magnetic steel.

[0036] Figure 8 Automatically generate a display interface for the client's on-board magnetic flux detection report.

[0037] In the picture: 00 geomagnetic sensor, 01 beam, 10 magnetic induction intensity detection module, 20 high-definition imaging module. DETAILED DESCRIPTION

[0038] refer to Figure 1 The vehicle detection system consists of a magnetic induction intensity detection module, a high-definition imaging module, a comprehensive positioning module, an ambient light compensation module, a control and signal acquisition module, and a client. The hardware composition logic reference Figure 1 ,The following paragraphs describe each module and its assembly relationship respectively.

[0039] This embodiment studies the synchronous correlation technology of magnetic steel signals, visual appearance analysis, spatiotemporal positioning data and other information, which is of great significance for ensuring railway transportation safety and improving efficiency.

[0040] The following is in conjunction with the instructions Figure 2 To the attached Figure 8 The implementation of the on-board detection system is described in detail.

[0041] The multiple functional modules in this system can be divided into two parts, namely the undercar detection unit and the in-car display unit, depending on their installation locations. The undercar detection unit consists of a magnetic induction intensity detection module, a high-definition imaging module, and an integrated positioning module. It also includes an ambient light compensation module and an on-board speed detection module. The in-car display unit includes a control and signal acquisition module and a client. The control and signal acquisition module generally uses an onboard industrial computer, while the client primarily consists of a motherboard, a display, and application software. The undercar detection unit detects data and transmits it to the in-car industrial computer via a high-speed communication transmission channel. The client then processes, stores, and displays the data. Combined with integrated positioning equipment, the detection data is located in real time, enabling automatic completion of detection data acquisition, processing, and positioning during operation.

[0042] The above-mentioned client can be a PC or a smart phone.

[0043] The magnetic induction intensity detection module 10 is primarily installed on the crossbeam 01 below the vehicle body, directly above the geomagnetic sensor 00. When the two are close together, they detect the magnetic flux of the geomagnetic sensor on the rail sleeper, obtaining magnetic induction data. The core component of this magnetic induction intensity detection module 10 is a magnetic induction sensor. According to Lorentz's law, when the onboard magnetic induction intensity detection module 10 passes over the rail sleeper at a certain speed, a voltage signal of varying strength is generated on the magnetic induction sensor. The magnetic field strength of the current ground magnetic steel signal is calculated based on parameters such as the instantaneous acceleration of the vehicle body and the number of turns of the sensor coil. This simulates whether the electric locomotive's automatic phase separation device can be triggered, thereby detecting whether the geomagnetic sensor is functioning properly and obtaining the ground magnetic steel signal strength value of the geomagnetic sensor. This ground magnetic steel signal strength value is collected, stored, and analyzed online.

[0044] The magnetic induction intensity detection module 10 is installed on both sides of the detection vehicle through cantilever installation, one on each side, and is set correspondingly to the geomagnetic sensors 00 on both sides of the track.

[0045] High-definition imaging module, the high-definition imaging module 20 includes two high-definition industrial cameras for shooting geomagnetic sensors, one on each side, and the two industrial cameras respectively perform visual imaging of the geomagnetic sensors on both sides. The high-definition imaging module is linked with the integrated positioning module and the power supply management module and other equipment for control, and the image data is obtained. For example, when the inspection vehicle is moving, the current driving speed calculated by the integrated positioning module is processed into a pulse for triggering equipment such as industrial cameras. The triggered equipment will obtain the corresponding data and send the data to the industrial computer server through a high-speed data acquisition card. The data acquisition software of the client performs preliminary processing on the image data and magnetic induction data, and then stores them in a certain format. The online monitoring and control software in the client will obtain certain data for monitoring and display by communicating with the industrial computer server.

[0046] This industrial camera uses a high-precision encoder to control the image sampling frequency, with high-precision imaging quality, horizontal ≦1mm, vertical ≦1mm.

[0047] The high-definition imaging module 20 is installed on the bottom crossbeam 01. Figure 2 , it is necessary to drill φ12 mounting holes at the corresponding positions of the beams, and use 8 M10*50 screw bolts with holes + hexagonal nuts + spring washers + cotter pins to fix them. There are 2 AD28.5 corrugated pipes entering the industrial computer cabinet inside the vehicle.

[0048] Furthermore, the above-mentioned industrial camera has an outward tilt angle after installation, and the tilt angle is not less than 5 degrees to obtain the best imaging viewing angle.

[0049] The magnetic induction intensity detection module is installed on the bottom beam 01 of the vehicle. Figure 3 The magnetic induction detection module is positioned a short distance from the HD imaging module, for example, about half a meter. Optimally, the magnetic induction detection module is positioned in front of the HD imaging module, where the front of the vehicle is considered the front. This way, the magnetic flux sensed by the magnetic induction detection module can serve as a trigger signal to instantly activate the industrial camera and LED light source.

[0050] The ambient light compensation module utilizes two sets of LED light sources, one on each side, and is paired with the aforementioned industrial camera. Based on the installation location and size of the magnets on the sleepers and the ambient light conditions, this LED light source is a customized, high-intensity, converging bar light suitable for magnet detection. This provides supplemental illumination for the inspection area in low ambient light conditions, both during the day and in low light conditions, ensuring clear images for the industrial camera.

[0051] The integrated positioning module includes an on-board speed sensor and a GNSS antenna. The on-board speed sensor obtains the vehicle's speed information, and the GNSS antenna obtains the vehicle's latitude and longitude information and the specific mileage corresponding to the basic data of the contact network line. Combined with the client's built-in integrated positioning board to record the geomagnetic sensor defects found and their corresponding kilometer mark and pillar number and other positioning information, it can accurately locate the geomagnetic sensor that has caused the defect, ensuring on-site accuracy and reference. Figure 7 .

[0052] The above-mentioned industrial camera and LED light source use the magnetic flux measurement of the magnet as a trigger signal, combined with the speed feedback of the vehicle-mounted speed sensor, to take fixed-point photos of the geomagnetic sensor, making the photo timing more accurate.

[0053] Among them, the high-definition imaging module and the ambient light compensation module are the first applications in the on-board detection project of magnetic steel performance. The geomagnetic sensor's high-definition imaging and magnetic induction intensity detection both detect the appearance and magnetic induction intensity of the magnetic steel, making the detection of the magnetic steel more comprehensive. The appearance and magnetic induction intensity of the magnetic steel performance can be detected in one maneuver. At the same time, the geomagnetic sensor's high-definition imaging module can also take photos of diseased magnetic steel for evidence collection, and combined with the coordinate positioning of the comprehensive positioning module, it can locate, photograph, record and classify the location and damage of the diseased geomagnetic sensor (also known as magnetic steel). Figure 7 , automatically generate magnetic steel defect report, reference Figure 8 facilitating subsequent positioning, manual replacement, and repair work. The implementation of this technology can effectively improve the accuracy of test results and the comprehensiveness of test indicators, meeting actual on-site needs and enhancing the informatization and intelligence of the testing process.

[0054] Set up corresponding applications in the client and conduct comprehensive application research on the detection data based on the applications. Examples include but are not limited to:

[0055] 1) Collect and store high-definition images of the line phase interval, and perform algorithm recognition on the images to achieve online positioning and identification of ground magnetic steel, and classify normal and detached ground magnetic steel.

[0056] 2) Collect, store and analyze magnetic induction intensity data online to obtain the magnetic induction intensity exceeding the limit or abnormal positioning points of the magnet.

[0057] 3) Generate a magnetic steel defect report. Its detection data basically meets production needs through comparative analysis. In the future, we will continue to establish historical comparative analysis of the same location and comparative analysis of data at different locations at the same time node through large sample data, and conduct in-depth research on the attenuation intensity of magnetic steel signals.

[0058] In this embodiment, the functional module of the on-board detection system for automatic over-phase magnetic steel performance of conventional railways is installed on the detection vehicle. The ground magnetic steel signal strength value is calculated based on parameters such as the instantaneous acceleration of the vehicle body and the number of turns of the sensor coil. A high-definition imaging module based on magnetic steel sensor detection is simultaneously designed. Using magnetic steel flux measurement as a trigger signal, it automatically collects the appearance status of the automatic over-phase magnetic steel of the contact network and generates image data. Combined with the comprehensive spatiotemporal positioning technology of the integrated positioning module, the line kilometer mark and contact network positioning point are automatically identified and accurately located. Software development technology is used in the client to build a functionally complete and user-friendly on-board magnetic steel flux detection intelligent analysis platform, realizing a complete detection process of real-time collection, real-time analysis, and real-time warning on the detection vehicle, greatly reducing the detection and analysis workload of operators, improving production efficiency, and saving maintenance and repair costs.

[0059] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements to the present invention by relevant technical personnel in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. The on-board detection system for automatic phase separation magnetic steel performance on conventional railways includes a magnetic induction intensity detection module, a high-definition imaging module, an integrated positioning module, an ambient light compensation module, a control and signal acquisition module, and a client. Its features include: The magnetic induction intensity detection module is installed on both sides of the vehicle, cantilevered, one on each side, to detect the magnetic flux of the geomagnetic sensors on both sides of the track; The high-definition imaging modules are installed on both sides of the vehicle, cantilevered, one on each side, to take pictures of the appearance of the geomagnetic sensors on both sides of the track; The ambient light compensation module is installed at the high-definition imaging module and paired with it to perform light compensation on the photo point; The integrated positioning module includes a vehicle-mounted speed sensor and a GNSS antenna. The vehicle-mounted speed sensor is installed at the axle and obtains vehicle speed information. The GNSS antenna is installed under the vehicle to obtain the vehicle's latitude and longitude information and the specific mileage corresponding to the basic data of the overhead line. The magnetic induction intensity detection module, high-definition imaging module, comprehensive positioning module, and ambient light compensation module are respectively connected to the control and signal acquisition module through high-speed communication transmission lines, and the control and signal acquisition module is electrically connected to the client.

2. The on-board detection system for automatic over-phase magnetic steel performance of conventional railway according to claim 1 is characterized in that: The control and signal acquisition module is an airborne industrial computer.

3. The vehicle-mounted detection system for automatic phase separation magnetic steel performance of conventional railway according to claim 1 is characterized in that: The client is a PC or a smart phone.

4. The vehicle-mounted detection system for automatic over-phase magnetic steel performance of conventional railway according to claim 1 is characterized in that: The high-definition imaging module is an industrial camera, and the imaging quality of the industrial camera meets the requirements of horizontal ≦1mm and vertical ≦1mm.

5. The vehicle-mounted detection system for automatic over-phase magnetic steel performance of conventional railway according to claim 4 is characterized in that: The high-definition imaging module is installed on the bottom crossbeam of the vehicle.

6. The vehicle-mounted detection system for automatic over-phase magnetic steel performance of conventional railway according to claim 1 is characterized in that: The magnetic induction intensity detection module is installed on the bottom cross beam of the vehicle.

7. The on-board detection system for automatic phase separation magnetic steel performance of conventional railway according to claim 1 is characterized in that: The magnetic induction intensity detection module is arranged on the front side of the high-definition imaging module.

8. The on-board detection system for automatic phase separation magnetic steel performance of conventional railway according to claim 1 is characterized in that: The ambient light compensation module is an LED light source.

9. The vehicle-mounted detection system for automatic over-phase magnetic steel performance of conventional railway according to claim 1 is characterized in that: The vehicle is a track inspection vehicle or a work vehicle.

10. The vehicle-mounted detection system for automatic phase separation magnetic steel performance of conventional railway according to claim 1 is characterized in that: The control and signal acquisition module and the client are located inside the vehicle.

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