Method for monitoring railway balance weight by using microwave radar

Abstract

The invention provides a method for monitoring a railway balance weight by using a microwave radar, which is characterized in that the microwave radar is used for monitoring the change of a balance weight and a balance weight rod in a long-distance and non-contact manner through microwave signals, and the process comprises the steps of mounting, initializing, data acquisition and storage, abnormal information elimination and reporting to a central server. The problems that equipment is difficult to install on the balance weight and foreign matter invasion risks exist can be solved, and the equipment is convenient to repair and maintain due to the fact that the equipment is installed on the limit. According to the method for monitoring the relative lifting change of the balance weight and the inclination change of the balance weight rod through the microwave radar, the tension change trend of the contact line and the inclination change trend of the balance weight rod can be automatically monitored, change prediction and early warning are conducted, manual inspection is replaced, and the abnormal problems of the balance weight and the balance weight rod are found in time; and an intelligent guarantee scheme is provided for safe operation of the train.

Description

Technical Field

[0001] The invention relates to the technical field of wireless monitoring, in particular to a method for realizing railway weight drop monitoring by applying microwave radar. Background Art

[0002] The railway contact network carries 25kv high voltage electricity. The contact wire will become loose as the temperature changes. In order to ensure the constant distance between the contact wire and the ground and ensure normal power supply, a pendant is hung on the pendant rod along the construction of the railway contact network pole, and the contact wire is tightened by the weight of the pendant itself. Problems such as aging and damage of the contact network cable, the stuck sliding mechanism of the pendant, and the tilt of the pendant rod will cause abnormal up and down changes of the pendant. The solution uses displacement sensors and vibration sensors to monitor the changes of the pendant. These sensor devices need to be installed on the pendant or the pendant rod, which affects the counterweight of the existing pendant and is easy to fall off, causing foreign objects to invade and affect driving safety. The vibration sensor cannot accurately monitor the displacement change of the pendant. The displacement sensor has the problem of complex installation and constant power supply, so it cannot be promoted and applied on a large scale. At present, manual periodic inspections are still mainly used to inspect and monitor the pendants and pendant rods on the railway. The manual inspection cycle is long and it is easy to miss inspections; there are problems with the safety of train operation and the personal safety management of inspectors in the railway line. Summary of the invention

[0003] In order to solve the problems of the prior art, the present invention provides a method for monitoring railway weight drop using microwave radar, which can automatically monitor the tension change trend of the contact line and the inclination change trend of the weight drop rod, make change predictions and early warnings, replace manual inspections, and promptly discover abnormal problems of the weight drop and the weight drop rod, thereby providing an intelligent protection solution for the safe operation of trains.

[0004] The present invention provides a method for realizing railway weight drop monitoring by using microwave radar, which adopts the following monitoring system, including an embedded mainboard control system and a microwave signal transceiver system connected to the embedded mainboard card, a power supply interface system and a communication interface system, wherein the communication interface system is connected to a central server, and the microwave signal transceiver system adopts a phased array antenna covered by an antenna horn cover. The specific method is as follows: 1) Install the monitoring system in the fence boundary area outside the limit, with the opening of the antenna horn facing the railway weight; 2) Carry out the initial monitoring area ROI division, monitor the initial status of the falling top and the falling top rod target and collect and save it, use the microwave signal transceiver system to scan the target area and target monitoring equipment, select the target area and target monitoring equipment on the scan map and save them; 3) The microwave signal transceiver system periodically scans the monitoring ROI area, scans the status of the weight and weight rod in the monitoring area in real time, and compares and analyzes it with the saved initial state data, calculates the position changes and shape changes of the weight and weight rod in the ROI area, and saves the analysis results; 4) Filter and analyze the abnormal data in the ROI according to the target's moving speed and shape; 5) The monitored data of railway weights and weight rod up and down changes, weight swing amplitude, weight shedding, weight rod tilt changes are periodically saved locally or reported to the central server; at the same time, real-time analysis is performed to see whether the threshold of the change has reached the threshold. When the warning threshold is reached, the warning information is triggered and reported to the central server.

[0005] As a further improvement, the communication interface system includes an Ethernet interface, a fiber optic interface and a 4G network interface.

[0006] Further improvement, the embedded motherboard control system includes a main control core processor module and a power management module connected to the main control core processor module, a millimeter wave radar module, a communication module and an onboard storage module, wherein the power management module is connected to the power supply interface system, the millimeter wave radar module is connected to the microwave signal transceiver system, and the communication module is connected to the communication interface system. The power management module is provided with a built-in power supply.

[0007] As a further improvement, the power supply interface system includes a solar panel, an AC power interface and a DC power interface.

[0008] Further improvement, in step 3), the microwave signal transceiver system periodically scans and monitors the ROI area as follows: 3.1) Microwave radar monitoring equipment sends continuous radio pulses through array antennas to detect target scenes, receives and records the echo of each pulse for storage and analysis; 3.2) The received echo data is denoised using the Fast Fourier Transform algorithm and the original measurement values ​​are sampled in the spatial domain; 3.3) Reconstruct the image through the regularized radar imaging algorithm based on sparse information and collect the distribution of the target object in the detection space.

[0009] Further improvement, in step 3), during the periodic scanning and monitoring ROI area by the microwave signal transceiver system, the phased array antenna uses beamforming technology to concentrate the energy of the wireless signal beam for transmission and reception, the embedded motherboard control system controls the phased array antenna beam and the scanning direction to maintain the same direction, and the antenna horn cover concentrates the microwave signal to be transmitted in the target direction.

[0010] The beneficial effects of the present invention are: 1. The microwave radar monitoring equipment for railway topples of the present invention can timely discover abnormal railway topples compared with the existing manual inspection, and the automated monitoring can reduce the workload of railway topples maintenance.

[0011] 2. The microwave radar monitoring equipment of the present invention is installed at the railway fence boundary to remotely monitor the status of the railway weight and the weight rod. Compared with the existing sensor monitoring weight scheme, the equipment needs to be installed on the weight or weight rod of the railway limit, and there is no risk of foreign objects falling off the equipment and invading the limit; it will not change the counterweight status of the existing weight; the equipment is easy to install and maintain.

[0012] 3. The microwave radar monitoring device of the present invention monitors railway weights. Compared with the existing monitoring scheme which only monitors the up and down changes of weights, it can monitor the multi-dimensional parameter changes of multiple targets such as weights and weight rods.

[0013] 4. The microwave radar monitoring equipment of the present invention is not affected by factors such as ambient light, temperature, and humidity changes, and can perform long-term all-weather monitoring operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is the block diagram of the microwave radar monitoring equipment; Figure 2 Monitor the working status of the gyro system for microwave radar; Figure 3 This is a picture collected for microwave radar monitoring. DETAILED DESCRIPTION

[0016] 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 only 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 are within the scope of protection of the present invention.

[0017] The monitoring system used in the present invention is as follows Figure 1 As shown, it includes an embedded motherboard control system and a microwave signal transceiver system, a power supply interface system and a communication interface system connected to the embedded motherboard card. The communication interface system is connected to the central server, and the microwave signal transceiver system adopts a phased array antenna covered by an antenna horn cover.

[0018] The communication interface system includes an Ethernet interface, an optical fiber interface and a 4G network interface.

[0019] The embedded motherboard control system includes a main control core processor module and a power management module, a millimeter wave radar module, a communication module and an onboard storage module connected to the main control core processor module, wherein the power management module is connected to the power supply interface system, the millimeter wave radar module is connected to the microwave signal transceiver system, and the communication module is connected to the communication interface system. The power management module is provided with a built-in power supply.

[0020] The power supply interface system includes a solar panel, an AC power interface and a DC power interface.

[0021] The specific monitoring method of the present invention is as follows Figure 2 As shown, including: 1) Install the monitoring system in the fence boundary area outside the limit, with the opening of the antenna horn facing the railway weight; 2) Carry out the initial monitoring area ROI division, monitor the initial status of the falling top and the falling top rod target and collect and save it, use the microwave signal transceiver system to scan the target area and target monitoring equipment, select the target area and target monitoring equipment on the scan map and save them; 3) The microwave signal transceiver system periodically scans and monitors the ROI area, scans the status of the weight and weight rod in the monitoring area in real time, and compares and analyzes the saved initial state data, calculates the position changes and shape changes of the weight and weight rod in the ROI area, and saves the analysis results; The specific process of the microwave signal transceiver system periodically scanning and monitoring the ROI area is as follows: 3.1) Microwave radar monitoring equipment sends continuous radio pulses through array antennas to detect target scenes, receives and records the echo of each pulse for storage and analysis; 3.2) The received echo data is denoised using the Fast Fourier Transform algorithm and the original measurement values ​​are sampled in the spatial domain; 3.3) Reconstruct the image through the regularized radar imaging algorithm based on sparse information and collect the distribution of the target object in the detection space; 4) Filter and analyze the abnormal data in the ROI according to the target's moving speed and shape; 5) The monitored data of railway weights and weight rod up and down changes, weight swing amplitude, weight shedding, weight rod tilt changes are periodically saved locally or reported to the central server; at the same time, real-time analysis is performed to see whether the threshold of the change has reached the threshold. When the warning threshold is reached, the warning information is triggered and reported to the central server.

[0022] To meet the requirements of scene monitoring applications in the railway industry, the protection level of the microwave radar monitoring equipment is designed according to the IP67 field use level; the power supply supports AC220V, DC power supply, and solar panel power supply; the communication supports optical fiber, Ethernet, and 4G network data transmission; the equipment has an anti-dismantling alarm function.

[0023] The microwave signal transceiver system antenna of the microwave radar monitoring equipment designed in this scheme adopts a phased array antenna, which uses beamforming technology to concentrate the energy of the wireless signal beam for transmission and reception, thereby improving the directionality of the transmitted signal; the embedded main control processor controls the phased array antenna beam and scanning direction to maintain the same direction when performing signal monitoring scanning, so as to achieve the accuracy and resolution of the microwave monitoring scanning and improve the scanning distance.

[0024] The microwave signal transceiver system antenna of the microwave radar monitoring equipment designed in this scheme is equipped with a horn-shaped radome, which concentrates the microwave signal and transmits it in the target direction, while also reducing the leakage of side lobe signals and the electromagnetic radiation interference of the equipment. The horn-shaped radome is detachable and can be installed according to the on-site application requirements.

[0025] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, the above is only a preferred embodiment of the present invention. Since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field is within the technical scope disclosed by the present invention. For ordinary technicians in the technical field, changes or replacements that can be easily thought of should be covered within the protection scope of the present invention without departing from the principle of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for monitoring railway weight drop using microwave radar, characterized in that: The following monitoring system is used, including an embedded motherboard control system and a microwave signal transceiver system, a power supply interface system and a communication interface system connected to the embedded motherboard card. The communication interface system is connected to the central server. The microwave signal transceiver system uses a phased array antenna covered by an antenna horn cover. The specific method is as follows: 1) Install the monitoring system in the fence boundary area outside the limit, with the opening of the antenna horn cover facing the railway weight; 2) Carry out the initial monitoring area ROI division, monitor the initial status of the falling top and the falling top rod target and collect and save it, use the microwave signal transceiver system to scan the target area and target monitoring equipment, select the target area and target monitoring equipment on the scan map and save them; 3) The microwave signal transceiver system periodically scans the monitoring ROI area, scans the status of the weight and weight rod in the monitoring area in real time, and compares and analyzes it with the saved initial state data, calculates the position changes and shape changes of the weight and weight rod in the ROI area, and saves the analysis results; 4) Filter and analyze the abnormal data in the ROI according to the target's moving speed and shape; 5) The monitored data of railway weights and weight rod up and down changes, weight swing amplitude, weight shedding, weight rod tilt changes are periodically saved locally or reported to the central server; at the same time, real-time analysis is performed to see whether the threshold of the change has reached the threshold. When the warning threshold is reached, the warning information is triggered and reported to the central server.

2. The method for monitoring railway weight drop using microwave radar according to claim 1, characterized in that: The communication interface system includes an Ethernet interface, an optical fiber interface and a 4G network interface.

3. The method for monitoring railway weight drop using microwave radar according to claim 1, characterized in that: The embedded motherboard control system includes a main control core processor module and a power management module, a millimeter wave radar module, a communication module and an onboard storage module connected to the main control core processor module, wherein the power management module is connected to the power supply interface system, the millimeter wave radar module is connected to the microwave signal transceiver system, and the communication module is connected to the communication interface system.

4. The method for monitoring railway weight drop using microwave radar according to claim 3, characterized in that: The power management module is provided with a built-in power supply.

5. The method for monitoring railway weight drop using microwave radar according to claim 1, characterized in that: The power supply interface system includes a solar panel, an AC power interface and a DC power interface.

6. The method for monitoring railway weight drop using microwave radar according to claim 1, characterized in that: Step 3) The microwave signal transceiver system periodically scans and monitors the ROI area as follows: 3.1) Microwave radar monitoring equipment sends continuous radio pulses through array antennas to detect target scenes, receives and records the echo of each pulse for storage and analysis; 3.2) The received echo data is denoised using the Fast Fourier Transform algorithm and the original measurement values ​​are sampled in the spatial domain; 3.3) Reconstruct the image through the regularized radar imaging algorithm based on sparse information and collect the distribution of the target object in the detection space.

7. The method for monitoring railway weight drop using microwave radar according to claim 1 or 6, characterized in that: Step 3) During the periodic scanning and monitoring ROI area by the microwave signal transceiver system, the phased array antenna uses beamforming technology to concentrate the energy of the wireless signal beam for transmission and reception, the embedded motherboard control system controls the phased array antenna beam and the scanning direction to maintain the same direction, and the antenna horn cover concentrates the microwave signal to be transmitted in the target direction.

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