Trackside vibration recognition device

Abstract

The utility model discloses a trackside vibration recognition device which comprises a plurality of first acceleration sensors, a plurality of second acceleration sensors, a signal conditioning and converting unit, an arithmetic unit, a communication unit and a power management unit. The first acceleration sensors and the second acceleration sensors are fixedly arranged on the rail web and the rail bottom of a to-be-detected steel rail respectively and used for collecting transverse and vertical vibration signals of the to-be-detected steel rail, and the signal conditioning and converting unit is used for conditioning the transverse vibration signals and the vertical vibration signals and converting the transverse vibration signals and the vertical vibration signals into digital signals. The operation unit is used for analyzing and processing the digital signal to obtain an operation result and a trigger comparison result, and the communication unit is used for transmitting the operation result to a public network; the power management unit is used for supplying power to each unit according to the trigger comparison result. The trackside vibration recognition device is installed beside the steel rail, rapid and long-term monitoring of track diseases can be achieved, and meanwhile the limitation that in the prior art, image recognition is relied on is overcome.

Description

Technical Field

[0001] This application relates to the field of rail transit technology, specifically to a trackside vibration identification device. Background Technology

[0002] Vibration and noise monitoring technology is one of the key technologies for safe operation of rail transit. It provides directional guidance and auxiliary decision-making for vibration and noise reduction schemes and preventive maintenance of rails during the track operation and maintenance phase, accumulates measured data for theoretical research on track vibration, and provides a scientific basis for the refined operation and maintenance of high-speed railway and conventional railway systems.

[0003] In recent years, existing technologies have also used vibration detection to assess wheel-rail relationships. However, due to the lack of edge computing and constraints imposed by the railway environment, rapid and long-term monitoring for track defect identification is not feasible, and the effectiveness of remediation for common defects cannot be effectively evaluated. Therefore, the problem of track vibration identification has remained difficult to solve effectively. Furthermore, existing technologies also employ high-speed cameras to identify track vibration; however, limitations in image recognition technology mean that measurement frequency and bandwidth are insufficient to accurately reflect the true state of track vibration, making them suitable only for measurements with limited information such as displacement. Utility Model Content

[0004] To address this, this application provides a trackside vibration identification device to solve the problems of existing track vibration identification methods lacking edge computing support, failing to achieve rapid and long-term track defect monitoring, and having limited effectiveness of image recognition technology under high frequency and wide bandwidth requirements.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A trackside vibration identification device includes multiple first acceleration sensors, multiple second acceleration sensors, a signal conditioning and conversion unit, a computing unit, a communication unit, and a power management unit. The multiple first acceleration sensors are fixedly installed on the web of the rail under test to collect lateral vibration signals and transmit them to the signal conditioning and conversion unit. The multiple second acceleration sensors are fixedly installed on the bottom of the rail under test to collect vertical vibration signals and transmit them to the signal conditioning and conversion unit.

[0007] The signal conditioning and conversion unit is used to condition and convert the lateral vibration signal and the vertical vibration signal into digital signals and then transmit them to the arithmetic unit; the arithmetic unit is used to analyze and process the digital signals to obtain the calculation result and the trigger comparison result, and transmit the calculation result to the communication unit and the trigger comparison result to the power management unit; the communication unit is used to transmit the calculation result to the public network; the power management unit is used to supply power to the multiple first acceleration sensors, the multiple second acceleration sensors, the signal conditioning and conversion unit, the arithmetic unit and the communication unit according to the trigger comparison result.

[0008] Preferably, the signal conditioning and conversion unit, the computing unit, the communication unit, and the power management unit are fixedly installed inside the electrical box, which is fixedly installed next to the rail to be tested.

[0009] Preferably, both the first accelerometer and the second accelerometer are accelerometers with a single vector range of 100g and a sensitivity of 50mV / g.

[0010] Preferably, two of each of the first and second acceleration sensors are provided.

[0011] Preferably, the first acceleration sensor is attached to the web of the rail to be tested, and the second acceleration sensor is attached to the bottom of the rail to be tested.

[0012] Preferably, the signal conditioning and conversion unit includes an isolation circuit, a filtering circuit, an amplification circuit, a shaping circuit, and a conversion circuit. The input terminal of the isolation circuit is electrically connected to the output terminals of a plurality of first accelerometers and a plurality of second accelerometers. The output terminal of the isolation circuit is electrically connected to the input terminal of the filtering circuit. The output terminal of the filtering circuit is electrically connected to the input terminal of the amplification circuit. The output terminal of the amplification circuit is electrically connected to the input terminal of the shaping circuit. The output terminal of the shaping circuit is electrically connected to the input terminal of the conversion circuit. The output terminal of the conversion circuit is electrically connected to the input terminal of the arithmetic unit.

[0013] Preferably, the communication unit is connected to the public network via wireless or wired communication.

[0014] Preferably, the power management unit is a battery pack.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] This application provides a trackside vibration identification device. By constructing a hardware architecture that includes multiple first acceleration sensors, multiple second acceleration sensors, a signal conditioning and conversion unit, a computing unit, a communication unit, and a power management unit, and installing this hardware architecture next to the rail, it can achieve rapid and long-term monitoring of track defects. At the same time, it solves the limitations of existing technologies that rely on image recognition. The entire device has a simple structure, high integration, low power consumption, and high stability. Attached Figure Description

[0017] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0018] Figure 1 A circuit block diagram of a trackside vibration identification device provided in this application;

[0019] Figure 2 A circuit diagram of a trackside vibration identification device provided in this application;

[0020] Figure 3 This application provides an installation diagram of a trackside vibration identification device;

[0021] Figure 4 This application provides a schematic diagram of the installation of the first and second acceleration sensors in a trackside vibration identification device.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100. Rail to be tested; 200. Railside vibration identification device; 201. First accelerometer; 202. Second accelerometer; 203. Signal conditioning and conversion unit; 204. Computation unit; 205. Communication unit; 206. Power management unit; 207. Electrical box. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0026] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0027] Please see Figure 1 and Figure 2 This application provides a trackside vibration identification device 200 for identifying track dynamic response, assessing the occurrence of wheel-rail resonance, and monitoring wheel-rail vibration. It includes multiple first acceleration sensors 201, multiple second acceleration sensors 202, a signal conditioning and conversion unit 203, a computing unit 204, a communication unit 205, and a power management unit 206. The output terminals of the multiple first acceleration sensors 201 and multiple second acceleration sensors 202 are electrically connected to the input terminal of the signal conditioning and conversion unit 203. The output terminal of the signal conditioning and conversion unit 203 is electrically connected to the input terminal of the computing unit 204. The output terminal of the computing unit 204 is connected to the input terminal of the communication unit 205. The output terminal of the communication unit 205 is connected to the public network. The output terminal of the power management unit 206 is electrically connected to the multiple first acceleration sensors 201, multiple second acceleration sensors 202, the signal conditioning and conversion unit 203, the computing unit 204, and the communication unit 205.

[0028] Please see Figure 3 and Figure 4In the trackside vibration identification device 200 provided in this application, multiple first accelerometers 201 are fixedly installed on the web of the rail 100 to be tested, for collecting the lateral vibration signal of the rail 100 and transmitting the lateral vibration signal to the signal conditioning and conversion unit 203; multiple second accelerometers 202 are fixedly installed on the bottom of the rail 100 to be tested, for collecting the vertical vibration signal of the rail 100 and transmitting the vertical vibration signal to the signal conditioning and conversion unit 203. The signal conditioning and conversion unit 203 is used to process the lateral vibration signal and the vertical vibration signal... After being conditioned and converted into a digital signal, the signal is transmitted to the arithmetic unit 204. The arithmetic unit 204 is used to analyze and process the digital signal to obtain the arithmetic result and the trigger comparison result, and transmits the arithmetic result to the communication unit 205 and the trigger comparison result to the power management unit 206. The communication unit 205 is used to transmit the arithmetic result to the public network. The power management unit 206 is used to supply power to the multiple first accelerometers 201, the multiple second accelerometers 202, the signal conditioning and conversion unit 203, the arithmetic unit 204 and the communication unit 205 according to the trigger comparison result.

[0029] In the trackside vibration identification device 200 provided in this application, both the first acceleration sensor 201 and the second acceleration sensor 202 are acceleration sensors with a single vector range of 100g and a sensitivity of 50mV / g; two of each type are provided. The two first acceleration sensors 201 are attached and fixed to the web of the rail 100 under test for collecting the lateral vibration signal of the rail 100, and the two second acceleration sensors 202 are attached and fixed to the bottom of the rail 100 under test for collecting the vertical vibration signal of the rail 100.

[0030] In the trackside vibration identification device 200 provided in this application, the signal conditioning and conversion unit 203 includes an isolation circuit, a filtering circuit, an amplification circuit, a shaping circuit, and a conversion circuit. The input terminal of the isolation circuit is electrically connected to the output terminals of multiple first accelerometers 201 and multiple second accelerometers 202. The output terminal of the isolation circuit is electrically connected to the input terminal of the filtering circuit. The output terminal of the filtering circuit is electrically connected to the input terminal of the amplification circuit. The output terminal of the amplification circuit is electrically connected to the input terminal of the shaping circuit. The output terminal of the shaping circuit is electrically connected to the input terminal of the conversion circuit. The output terminal of the conversion circuit is electrically connected to the input terminal of the arithmetic unit 204. The conversion circuit uses a common analog-to-digital converter (ADC).

[0031] In the trackside vibration identification device 200 provided in this application, the arithmetic unit 204 is used to analyze and process digital signals, including fast Fourier transform, filtering, integration, threshold setting, and trigger comparison, and transmits the calculation results to the communication unit 205, transmits the trigger comparison result (trigger acquisition) signal to the power management unit 206, and extracts feature values ​​from the analyzed and processed digital signals. In this application, the arithmetic unit 204 uses existing time-domain, frequency-domain, or time-frequency-domain methods to process the digital signals, thereby giving the digital signals higher time precision and accuracy.

[0032] It should be noted that the algorithms used by the arithmetic unit 204 to analyze and process digital signals in this application are all conventional techniques, and this application does not involve any improvement to the algorithms.

[0033] In the trackside vibration identification device 200 provided in this application, the communication unit 205 is connected to the public network via wireless or wired communication. The choice between wireless and wired connection depends on the site conditions.

[0034] In the trackside vibration identification device 200 provided in this application, the power management unit 206 is used to supply power to the sensors and various units in the device, and also to receive the trigger power supply from the arithmetic unit 204. The power management unit 206 can be powered by a high-power battery pack, thereby extending the working time of the device and enabling it to work online for extended periods.

[0035] In the trackside vibration identification device 200 provided in this application, the signal conditioning and conversion unit 203, the arithmetic unit 204, the communication unit 205 and the power management unit 206 are all fixedly installed inside the electrical box, which is fixedly installed next to the rail 100 to be tested.

[0036] This application provides a trackside vibration identification device. By constructing a hardware architecture that includes multiple first acceleration sensors, multiple second acceleration sensors, a signal conditioning and conversion unit, a computing unit, a communication unit, and a power management unit, and installing this hardware architecture next to the rail, it can achieve rapid and long-term monitoring of track defects. At the same time, it solves the limitations of existing technologies that rely on image recognition. The entire device has a simple structure, high integration, low power consumption, and high stability. It can identify various abnormal track vibrations and related defects, and is suitable for complex track environments.

[0037] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A trackside vibration identification device, characterized in that, The system includes multiple first accelerometers, multiple second accelerometers, a signal conditioning and conversion unit, a computing unit, a communication unit, and a power management unit. The multiple first accelerometers are fixedly installed on the web of the rail under test to collect lateral vibration signals and transmit them to the signal conditioning and conversion unit. The multiple second accelerometers are fixedly installed on the bottom of the rail under test to collect vertical vibration signals and transmit them to the signal conditioning and conversion unit. The signal conditioning and conversion unit is used to condition and convert the transverse vibration signal and the vertical vibration signal into digital signals and then transmit them to the computing unit; the computing unit is used to analyze and process the digital signals to obtain the calculation results and the trigger comparison results, and transmit the calculation results to the communication unit and the trigger comparison results to the power management unit. The communication unit is used to transmit the calculation results to the public network; The power management unit is used to supply power to the plurality of first accelerometers, the plurality of second accelerometers, the signal conditioning and conversion unit, the arithmetic unit and the communication unit according to the trigger comparison result.

2. The trackside vibration identification device according to claim 1, characterized in that, The signal conditioning and conversion unit, the computing unit, the communication unit, and the power management unit are fixedly installed inside the electrical box, which is fixedly installed next to the rail to be tested.

3. The trackside vibration identification device according to claim 1, characterized in that, Both the first and second accelerometers are accelerometers with a single vector range of 100g and a sensitivity of 50mV / g.

4. The trackside vibration identification device according to claim 1, characterized in that, Both the first accelerometer and the second accelerometer are provided in pairs.

5. The trackside vibration identification device according to claim 1, characterized in that, The first acceleration sensor is attached and fixed to the web of the rail to be tested, and the second acceleration sensor is attached and fixed to the bottom of the rail to be tested.

6. The trackside vibration identification device according to claim 1, characterized in that, The signal conditioning and conversion unit includes an isolation circuit, a filtering circuit, an amplification circuit, a shaping circuit, and a conversion circuit. The input terminal of the isolation circuit is electrically connected to the output terminals of multiple first accelerometers and multiple second accelerometers. The output terminal of the isolation circuit is electrically connected to the input terminal of the filtering circuit. The output terminal of the filtering circuit is electrically connected to the input terminal of the amplification circuit. The output terminal of the amplification circuit is electrically connected to the input terminal of the shaping circuit. The output terminal of the shaping circuit is electrically connected to the input terminal of the conversion circuit. The output terminal of the conversion circuit is electrically connected to the input terminal of the arithmetic unit.

7. The trackside vibration identification device according to claim 1, characterized in that, The communication unit is connected to the public network via wireless or wired communication.

8. The trackside vibration identification device according to claim 1, characterized in that, The power management unit uses a battery pack.

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