A kind of unmanned aerial vehicle device for railway viaduct wireless interference troubleshooting

Abstract

The utility model discloses a kind of unmanned aerial vehicle devices for railway viaduct wireless interference investigation, in efficiency, unmanned aerial vehicle body flies according to preset route, can quickly cover large area, shorten investigation period, timely find interference problem;In positioning accuracy, antenna matching module optimizes the signal collected by Yagi antenna, so that signal quality is improved, ground receiving analysis module obtains clearer and more accurate information, so as to accurately locate interference source;In cost, a few operators can control unmanned aerial vehicle, manpower demand is less, and compared with special detection train and other large equipment, unmanned aerial vehicle cost is lower;In flexibility, unmanned aerial vehicle flight in the air can adapt to complex terrain environment, expand investigation range and depth;In the face of sudden interference event, it can quickly respond and arrive on the scene investigation, quickly solve the problem, and ensure the normal operation of railway communication system.

Description

Technical Field

[0001] This utility model relates to the field of wireless interference investigation technology for railway viaducts, and in particular to a drone device for investigating wireless interference on railway viaducts. Background Technology

[0002] As a core component of modern transportation infrastructure, the stability of the communication system of railway viaducts is directly related to train operation safety and dispatching efficiency. However, with the widespread application of wireless communication technology, the electromagnetic environment around viaducts is becoming increasingly complex, with risks of wireless interference such as interference from multiple coexisting networks, interference from illegal equipment, and interference from equipment failure. In order to maintain the stability of the communication system of railway viaducts, it is necessary to conduct wireless interference investigations on railway viaducts.

[0003] Existing technologies mainly rely on manual inspection and spectrum analyzer testing or dedicated inspection train testing. However, manual inspection and spectrum analyzer testing require the deployment of testing personnel along the line, which is time-consuming, labor-intensive, and difficult to cover the entire section. Moreover, manual location of interference sources depends on experience and is easily affected by terrain obstruction. Dedicated inspection train testing requires the equipment of high-speed real-time spectrum scanners and integrated positioning systems, with a single testing cost of hundreds of thousands of yuan. Furthermore, it is only suitable for regular inspections and cannot cope with sudden interference events. Utility Model Content

[0004] In view of this, this utility model proposes a drone device for investigating wireless interference on railway viaducts, which can solve the defects of low efficiency, insufficient accuracy, high cost and poor flexibility in the existing technology.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A drone device for investigating wireless interference on railway viaducts includes:

[0007] The drone itself is equipped with a Yagi antenna to collect wireless signals from the railway viaduct section;

[0008] Antenna matching module, used to receive wireless signals collected by Yagi antenna;

[0009] The wired signal transmission module is used to transmit the wireless signals received by the antenna matching module to the ground;

[0010] The ground receiving and analysis module is used to receive and analyze signals from the wired signal transmission module to locate the source of interference.

[0011] As a further optional embodiment of the UAV device for investigating wireless interference on railway viaducts, the antenna matching module includes:

[0012] Impedance transformation network circuit is used to transform the input impedance of the Yagi antenna to a value that matches the output impedance of subsequent circuits;

[0013] A filter circuit is used to filter out out-of-band noise.

[0014] As a further optional embodiment of the UAV device for wireless interference detection on railway viaducts, the wired signal transmission module includes:

[0015] Radio frequency signal modulation circuit, used to convert the wireless signal received by the antenna matching module into an electrical signal;

[0016] An optical transmitter is used to convert electrical signals output from a radio frequency signal modulation circuit into optical signals and then transmit those optical signals.

[0017] As a further optional embodiment of the UAV device for investigating wireless interference on railway viaducts, the ground receiving and analysis module includes:

[0018] An optical receiver is used to receive optical signals emitted by an optical transmitter and convert the received optical signals back into electrical signals.

[0019] The radio frequency signal demodulation circuit is used to demodulate the electrical signal output by the optical receiver to obtain the demodulated wireless signal.

[0020] A digital signal processor is used to locate the source of interference based on the demodulated wireless signal.

[0021] As a further alternative to the aforementioned UAV device for investigating wireless interference on railway viaducts, the radio frequency signal demodulation circuit includes a CD4046 chip and its peripheral circuitry.

[0022] As a further alternative to the aforementioned UAV device for investigating wireless interference on railway viaducts, the digital signal processor includes a DSP processor and its peripheral circuitry.

[0023] The beneficial effects of this invention are as follows: The UAV itself possesses flexible flight capabilities, enabling it to quickly fly over railway viaduct sections along preset routes. It can cover a large area in a short time, significantly shortening the interference investigation cycle and enabling timely detection of potential wireless interference problems, thus improving overall investigation efficiency. The antenna matching module optimizes the signals collected by the Yagi antenna, resulting in higher signal quality and more accurate reflection of the interference source's characteristics. The ground receiving and analysis module can obtain clearer and more accurate signal information during signal analysis, thereby more precisely locating the interference source and improving positioning accuracy. Using UAVs for interference investigation requires only a few operators to control the UAV's flight and monitor data transmission, greatly reducing manpower requirements. Furthermore, compared to large-scale testing equipment such as dedicated inspection trains, UAVs are relatively inexpensive, reducing investigation costs. In addition, UAVs have the advantage of aerial flight, adapting to various complex terrains and environmental conditions, expanding the scope and depth of interference investigation. When a sudden wireless interference event occurs on a railway viaduct section, the UAV can quickly take off and reach the scene for investigation, rapidly locating and resolving sudden interference problems, ensuring the normal operation of the railway communication system, and thus improving the flexibility of the investigation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the composition of an unmanned aerial vehicle (UAV) device for investigating wireless interference on railway viaducts according to the present invention.

[0026] Figure 2 This is a circuit diagram of the antenna matching module in this utility model;

[0027] Figure 3 This is a circuit diagram of the radio frequency signal modulation circuit in this utility model;

[0028] Figure 4 This is a circuit diagram of the radio frequency signal demodulation circuit in this utility model;

[0029] Figure 5 This is a circuit diagram of the digital signal processor in this utility model. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] refer to Figures 1 to 5 A drone device for troubleshooting wireless interference on railway viaducts includes a drone body, an antenna matching module, a wired signal transmission module, and a ground receiving and analysis module, wherein:

[0032] The drone itself can fly over the elevated bridge area according to a preset trajectory, and is used to carry a Yagi antenna to place it in a suitable position to collect wireless signals from the railway viaduct section.

[0033] Specifically, the Yagi antenna is highly sensitive to the direction and altitude of signal reception. The drone can fly along a preset trajectory and accurately position the Yagi antenna at different suitable locations above the viaduct area. For example, it can hover or move precisely above different spans of the viaduct or near locations where signal sources may exist, so that the antenna is in the optimal direction and altitude for signal reception. This avoids the obstruction and reflection interference of ground obstacles, and maximizes the reception of interference-free or low-interference original wireless signals from the railway viaduct section, improving the signal strength and quality, and providing a reliable data foundation for subsequent accurate analysis of interference sources.

[0034] The preset trajectory can be designed to cover multiple key locations and areas of the overpass. During the flight of the drone, the Yagi antenna can collect signals at different locations and obtain a rich variety of signal samples. These signals from different locations contain interference information from different angles and distances. By fusing and analyzing the signals collected from multiple locations, we can gain a more comprehensive understanding of the distribution of wireless signals in the overpass area, more accurately identify the characteristics and location of interference sources, and improve the accuracy of interference investigation.

[0035] The terrain and environment surrounding railway viaducts are complex and diverse, potentially including obstacles such as mountains, rivers, and buildings. Unmanned aerial vehicles (UAVs) are not limited by ground terrain and can easily fly over these obstacles to reach areas difficult for humans to access for signal collection. For example, in canyons or river areas beneath viaducts, UAVs can fly at low altitudes to acquire wireless signal information, providing comprehensive coverage of the viaduct and its surrounding area without missing any potential sources of interference, thus improving the comprehensiveness and flexibility of the investigation.

[0036] Drones have high flight speed and flexibility, enabling them to quickly fly over large areas of viaducts. Compared to manual inspections, where people need to walk or travel slowly along the viaduct, drones can complete signal collection over long distances of viaducts in a short time according to a preset trajectory. This greatly shortens the signal collection time, improves the efficiency of the entire wireless interference investigation, and can promptly detect potential interference problems, reducing the impact of communication failures caused by interference on railway operations.

[0037] An antenna matching module is used to receive wireless signals collected by a Yagi antenna. In some embodiments, the antenna matching module includes:

[0038] Impedance transformation network circuit is used to transform the input impedance of the Yagi antenna to a value that matches the output impedance of subsequent circuits;

[0039] A filter circuit is used to filter out out-of-band noise.

[0040] Specifically, when the wireless signal collected by the Yagi antenna is transmitted to the subsequent circuit, there is an impedance mismatch problem. Impedance mismatch will cause the signal to be reflected during transmission, resulting in signal energy loss. The impedance transformation network circuit can transform the input impedance of the Yagi antenna to a value that matches the output impedance of the subsequent circuit, reducing signal reflection and allowing more signal energy to be effectively transmitted from the Yagi antenna to the subsequent circuit, improving signal transmission efficiency, ensuring that the subsequent circuit can receive a stronger signal, and laying the foundation for accurate analysis of wireless signals.

[0041] In real-world wireless signal acquisition environments, various out-of-band noises exist, such as communication signals from adjacent frequency bands and industrial interference signals. These noises can superimpose onto the target signal, affecting its clarity and accuracy. Filtering circuits can, according to a preset frequency range, allow only signals from specific frequency bands (i.e., the band where the target interference signal is located) to pass through, suppressing noise signals from other frequency bands. This effectively filters out out-of-band noise, improves the signal-to-noise ratio, and makes the acquired wireless signal cleaner. A cleaner signal helps subsequent circuits extract signal features more accurately, enabling interference source localization and analysis, thus improving the accuracy and reliability of the entire wireless interference investigation system.

[0042] A wired signal transmission module is used to transmit the wireless signal received by the antenna matching module to the ground. In some embodiments, the wired signal transmission module includes:

[0043] Radio frequency signal modulation circuit, used to convert the wireless signal received by the antenna matching module into an electrical signal;

[0044] An optical transmitter is used to convert electrical signals output from a radio frequency signal modulation circuit into optical signals and then transmit those optical signals.

[0045] Specifically, wireless signals are susceptible to various factors and have poor stability when transmitted in free space. Radio frequency signal modulation circuits convert wireless signals into electrical signals. This conversion process makes the signals more suitable for transmission in wired media. The optical transmitter further converts the electrical signals into optical signals for transmission. Optical signals are less affected by external environmental factors (such as electromagnetic interference and weather changes) when transmitted in wired media such as optical fibers. Compared with wireless transmission, wired transmission significantly reduces signal fluctuations and interruptions, ensuring that the signal can be transmitted stably and continuously from the antenna matching module to the ground receiver, providing a stable data source for subsequent signal analysis and interference source localization.

[0046] During the transmission of wireless signals to the ground, various electromagnetic interferences are encountered. Radio frequency signal modulation circuits modulate the signals, which can change the spectral characteristics of the signals and allow them to avoid common interference frequency bands to a certain extent. Optical signal transmission has a natural advantage in resisting electromagnetic interference because optical signals propagate in the form of light in optical fibers and are not directly affected by electromagnetic fields. This effectively reduces the impact of external interference on the signal, reduces noise and distortion in the signal, and improves the quality and accuracy of the signal, enabling the ground receiver to receive clearer and more authentic original wireless signal information.

[0047] Optical signals experience low transmission loss in optical fibers, enabling long-distance signal transmission without frequent repeater amplification. Furthermore, optical fiber communication boasts a large bandwidth, allowing it to carry more data. The radio frequency signal modulation circuit converts the wireless signal into an electrical signal suitable for processing by the optical transmitter, providing a suitable signal source for optical signal transmission. This meets the long-distance signal transmission requirements that may exist in the investigation of wireless interference on railway viaducts, and it can transmit wireless signals containing rich information, facilitating comprehensive analysis and processing of the signal by the ground receiving and analysis module, thus helping to more accurately locate the interference source.

[0048] A ground receiving and analysis module is used to receive and analyze signals from the wired signal transmission module and locate the source of interference. In some embodiments, the ground receiving and analysis module includes:

[0049] An optical receiver is used to receive optical signals emitted by an optical transmitter and convert the received optical signals back into electrical signals.

[0050] The radio frequency signal demodulation circuit is used to demodulate the electrical signal output by the optical receiver to obtain the demodulated wireless signal.

[0051] A digital signal processor is used to locate the source of interference based on the demodulated wireless signal.

[0052] Specifically, the wired signal transmission module transmits optical signals, and the optical receiver converts the optical signals emitted by the optical transmitter back into electrical signals. This is the initial restoration of the transmitted signal. The radio frequency signal demodulation circuit further demodulates the electrical signals output by the optical receiver, restoring the modulated signal to the original wireless signal. Through these two steps, the characteristics and content of the original wireless signal collected by the Yagi antenna are restored to the greatest extent possible, providing a reliable data foundation for subsequent accurate signal analysis and interference source location, and ensuring the accuracy of the analysis results.

[0053] The digital signal processor locates the interference source based on the demodulated wireless signal. Because the optical receiver and radio frequency signal demodulation circuit accurately restore the signal, the digital signal processor can obtain more realistic and complete signal information. Based on this accurate information, the digital signal processor can calculate the location of the interference source more precisely, which greatly improves the accuracy of interference source location and can more accurately determine the specific location of the interference source. This provides more precise guidance for the railway department to take timely measures to eliminate interference and reduces the impact of interference on the railway communication system.

[0054] In the environment of railway viaducts, the wireless signal environment is complex and may contain various types of interference signals and noise. The combination of optical receiver, radio frequency signal demodulation circuit and digital signal processor has certain anti-interference and signal processing capabilities. For example, the radio frequency signal demodulation circuit can perform certain filtering and correction on the signal during demodulation, and the digital signal processor can distinguish between useful signals and interference signals. This enables the ground receiving and analysis module to work stably in complex signal environments, accurately extract useful signals and locate interference sources, thereby improving the reliability and adaptability of the system in complex environments.

[0055] In some embodiments, the radio frequency signal demodulation circuit includes a CD4046 chip and its peripheral circuits, and the digital signal processor includes a DSP processor and its peripheral circuits.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drone device for investigating wireless interference on railway viaducts, characterized in that, include: The drone itself is equipped with a Yagi antenna to collect wireless signals from the railway viaduct section; Antenna matching module, used to receive wireless signals collected by Yagi antenna; The wired signal transmission module is used to transmit the wireless signals received by the antenna matching module to the ground; The ground receiving and analysis module is used to receive and analyze signals from the wired signal transmission module to locate the source of interference.

2. The UAV device for investigating wireless interference on railway viaducts according to claim 1, characterized in that, The antenna matching module includes: Impedance transformation network circuit is used to transform the input impedance of the Yagi antenna to a value that matches the output impedance of subsequent circuits; A filter circuit is used to filter out out-of-band noise.

3. The UAV device for investigating wireless interference on railway viaducts according to claim 2, characterized in that, The wired signal transmission module includes: Radio frequency signal modulation circuit, used to convert the wireless signal received by the antenna matching module into an electrical signal; An optical transmitter is used to convert electrical signals output from a radio frequency signal modulation circuit into optical signals and then transmit those optical signals.

4. The UAV device for investigating wireless interference on railway viaducts according to claim 3, characterized in that, The ground receiving and analysis module includes: An optical receiver is used to receive optical signals emitted by an optical transmitter and convert the received optical signals back into electrical signals. The radio frequency signal demodulation circuit is used to demodulate the electrical signal output by the optical receiver to obtain the demodulated wireless signal. A digital signal processor is used to locate the source of interference based on the demodulated wireless signal.

5. The UAV device for investigating wireless interference on railway viaducts according to claim 4, characterized in that, The radio frequency signal demodulation circuit includes a CD4046 chip and its peripheral circuits.

6. The UAV device for investigating wireless interference on railway viaducts according to claim 5, characterized in that, The digital signal processor includes a DSP processor and its peripheral circuitry.

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