A track defect detection device

Abstract

The utility model discloses a track disease detection device, apply to rail transit infrastructure, including the car body, electromagnetic seal module, cleaning module and data acquisition unit, wherein, electromagnetic seal module sliding installation is in the bottom of car body, and electromagnetic seal module is array formula structure to constitute by several electromagnet unit, and cleaning module is located one side of electromagnetic seal module, and cleaning module is used for cleaning rail transit infrastructure, and data acquisition unit is installed in the top of cleaning module, and data acquisition unit and electromagnetic seal module pass electricity to be connected. In the application, through the combination of electromagnetic seal module, cleaning module and data acquisition unit, the accuracy of disease detection can be enhanced, the measurement error can be reduced, and in the use process, complex working conditions can be adapted, continuous detection can be realized, operation and maintenance efficiency can be improved, and at the same time, through the adoption of the data acquisition unit, real track leakage and device sealing failure can be effectively distinguished, and the false alarm rate can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of track inspection technology, and in particular to a track defect detection device. Background Technology

[0002] In rail transit infrastructure, the traditional method of manual inspection is often used, which includes two modes: foot inspection and on-board inspection.

[0003] In related technologies, the foot inspection mode involves inspectors using tools such as inspection hammers to assess railway damage step by step. This method has significant shortcomings, specifically poor inspection efficiency, a limited coverage area for a single inspection, and high workload for inspectors. In the ride-on inspection mode, inspectors ride on a moving train to observe railway damage. This mode heavily relies on the inspectors' observation skills, and in practical applications, its detection accuracy and precision are relatively low.

[0004] In summary, traditional detection devices are inefficient, subject to human intervention, unable to detect hidden damage inside the track, have low inspection efficiency, and are difficult to adapt to complex structures for airtightness testing, resulting in a high false alarm rate. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a track defect detection device, the technical solution of which is as follows: A track defect detection device, applied to rail transit infrastructure, includes: Vehicle body; An electromagnetic sealing module is slidably installed at the bottom of the vehicle body. The electromagnetic sealing module has an array structure and is composed of several electromagnet units. A cleaning module, located on one side of the electromagnetic sealing module, is used to clean the rail transit infrastructure. A data acquisition unit is installed above the cleaning module, and the data acquisition unit and the electromagnetic sealing module are electrically connected.

[0006] In some embodiments, a vortex vacuum pump is also included, which is disposed on the side of the data acquisition unit away from the cleaning module.

[0007] In some embodiments, the data acquisition unit includes a pressure sensor and an active vibrator, the active vibrator being mounted on the vehicle body and receiving vibration signals through the vibration sensor; The pressure sensor is embedded in the gaps between several of the electromagnet units and provides real-time feedback on the contact pressure distribution. Each of the electromagnet units is independently connected to the controller.

[0008] In some embodiments, the vehicle body is provided with a control module electrically connected to the electromagnetic sealing module, and the control module is used to control the adsorption force of the electromagnet unit.

[0009] In some embodiments, the cleaning module includes a water sprayer and a blower mounted on the vehicle body, wherein the water sprayer and the blower are both at an angle of 60 degrees to the vehicle body.

[0010] In some embodiments, a flexible sealing ring is installed on the electromagnetic sealing module, the flexible sealing ring comprising an inner layer and an outer layer.

[0011] In some embodiments, the inner layer is made of fluororubber, and the outer layer is made of silicone foam.

[0012] The technological advancements achieved by this invention compared to existing technologies are as follows: This utility model has the following beneficial effects: 1. High-precision quantitative detection The data acquisition unit greatly reduces the measurement error of internal defect volume and significantly increases the range of detectable crack sizes.

[0013] 2. Adaptability to complex working conditions The adaptive adjustment function of the electromagnetic sealing module enables the device to maintain an effective seal even when the track surface is uneven. With the integration of the self-cleaning module, it can work normally in rainy, snowy, and dusty environments.

[0014] 3. Breakthrough in Operation and Maintenance Efficiency It has a short single-test cycle and supports continuous testing of trains.

[0015] 4. False alarm rate control It can effectively distinguish between actual track leakage and device seal failure, reducing the overall false alarm rate of the system. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the track defect detection device of this utility model; Figure 2 This is a schematic diagram of the structure of the track defect detection device of this utility model; Figure 3 This is a schematic diagram of the electromagnetic sealing module in this utility model; Figure 4 This is a schematic diagram of the electromagnet unit in this utility model; Figure 5 This is a partial schematic diagram of the track defect detection device of this utility model; Figure 6 This is a schematic diagram of the cleaning module in this utility model; Figure 7 This is a flowchart of the track defect detection device of this utility model; Figure 8 This is a schematic diagram showing the relationship between air pressure and time. Figure 9 This is a schematic diagram showing the frequency and time display.

[0018] In the diagram: 1. Vehicle body; 10. Slide rail; 2. Electromagnetic sealing module; 21. Electromagnet unit; 22. Flexible sealing ring; 220. Inner layer; 221. Outer layer; 3. Cleaning module; 31. Water sprayer; 310. Arc-shaped opening; 32. Air blower; 4. Data acquisition unit; 41. Pressure sensor; 42. Active vibrator; 5. Vortex vacuum pump; 6. Control module. Detailed Implementation

[0019] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0020] As 1 to Figure 9 As shown, this utility model discloses a track defect detection device, applied to rail transit infrastructure, including a car body 1, an electromagnetic sealing module 2, a cleaning module 3, and a data acquisition unit 4. The car body 1 is constructed of a lightweight aluminum alloy frame, weighing less than 35 kg. The electromagnetic sealing module 2 is slidably installed on the bottom of the car body 1. The sliding method can be adapted to the requirements. In one example, multiple slide rails 10 are provided on the bottom of the car body 1. The extension direction of the multiple slide rails 10 (as shown in the figure) is parallel to the height direction of the car body (as shown in the figure). The electromagnetic sealing module 2 is installed on the slide rails 10. During use, the electromagnetic sealing module 2 moves up and down along the extension direction of the slide rails 10 (as shown in the figure) to adjust the electromagnet adsorption force in real time according to the track surface morphology. That is, the contact pressure is adjusted in real time to ensure that the track surface undulation is 0.1-3 mm and the vehicle speed is ≤15 km / h, so as to adapt to complex working conditions.

[0021] The electromagnetic sealing module 2 has an array structure and is composed of several electromagnet units 21. The number of electromagnet units 21 can be adaptively set according to the requirements. For example, 64 square electromagnet units 21 can be set, each with a size of 25×25 mm. The arrangement density of the 64 electromagnet units 21 can be 8 units / decimeter. The cleaning module 3 is located on one side of the electromagnetic sealing module 2. The cleaning module 3 is used to clean the rail transit infrastructure and ensure normal operation in severe weather (such as rain, snow, etc.) or dust pollution environments. The data acquisition unit 4 is installed above the cleaning module 3. The data acquisition unit 4 is used to collect data related to track defects. The data acquisition unit 4 and the electromagnetic sealing module 2 are electrically connected to achieve continuous detection, high detection efficiency, and reduced false alarm rate.

[0022] During operation, firstly, a pre-detection area is selected according to the requirements, and the electromagnetic sealing module 2 is used to pre-adsorb and scan the track surface morphology. The position of the electromagnetic sealing module 2 is moved up and down to ensure that there is no gap at the contact point between the track surface and the electromagnetic sealing module 2. Then, the secondary sealing pressure is activated, that is, the cleaning module 3 is turned on to purge the pre-detection area. Next, the air extraction equipment is used to extract air to the reference vacuum level. The data acquisition unit 4 collects the pressure decay curve and records the characteristic peak value. Finally, the computer data model, such as the leakage judgment model, outputs the defect level. If a defect is detected, the vehicle stops and the detection steps are repeated to determine the defect type; if no defect is detected, the vehicle continues to travel.

[0023] In this application, by combining the electromagnetic sealing module, the cleaning module, and the data acquisition unit, the accuracy of detecting defects can be enhanced, measurement errors can be reduced, and during use, it can adapt to complex working conditions, achieve continuous detection, and improve operation and maintenance efficiency. At the same time, the use of the data acquisition unit can effectively distinguish between actual track leakage and device sealing failure, reducing the false alarm rate.

[0024] In some embodiments, the evacuation settings can be adaptively configured as needed; in one example, such as... Figure 1 As shown, the pumping device is a vortex vacuum pump 5. The vortex vacuum pump 5 is used for gas transportation and gas treatment in a vacuum environment, namely, gas transportation, vacuum environment maintenance and enhancement and exhaust. The vortex vacuum pump 5 is located on the side away from the data acquisition unit 4 of the cleaning module 3 and is fixedly installed on the vehicle body 1.

[0025] In some embodiments, such as Figures 1 to 5As shown, the data acquisition unit 4 includes a pressure sensor 41 and an active vibrator 42. The active vibrator 42 is mounted on the vehicle body 1 and receives vibration signals through the vibration sensor in the active vibrator 42. The pressure sensor 41 is embedded in the gaps of several electromagnet units 21 and provides real-time feedback on the contact pressure distribution. Each electromagnet unit 21 is independently connected to a PID controller (not shown in the figure). Through the joint analysis of the pressure sensor 41 and the active vibrator 42, the measurement error of the volume of defects inside the track is greatly reduced. Furthermore, by combining pressure attenuation with vibration signals, the range of detectable crack sizes is greatly improved, thereby enhancing the detection accuracy.

[0026] In some embodiments, continue to refer to Figures 1 to 6 As shown, the vehicle body 1 is equipped with a control module 6 that is electrically connected to the electromagnetic sealing module 2. The control module 6 is used to control the adsorption force of the electromagnet unit 21, so that the electromagnet unit 21 dynamically adjusts the adsorption force according to the pre-scanned track surface morphology data, thereby ensuring the accuracy of subsequent detection.

[0027] In some embodiments, such as Figure 1 , Figure 6 As shown, the cleaning module 3 includes a water sprayer 31 and a blower 32 installed on the vehicle body 1. One end of the water sprayer 31 has an arc-shaped opening 310 from which water is sprayed, providing a good spray range. Both the water sprayer 31 and the blower 32 have an angle with the vehicle body 1, meaning they are tilted. The angle can be adjusted as needed. In one example, the angle between the water sprayer 31 and the blower 32 and the vehicle body 1 is 60 degrees. During use, when the track defect detection device moves and performs detection, the water sprayer 31 sprays water to clean the surface, and the blower 32 blows air to ensure the surface is clean and free of impurities. This also ensures that the detected defects (such as cracks and damage) are clearly visible. The angle between the water sprayer 31 and the blower 32 and the vehicle body 1 increases the cleaning area, thus ensuring clear and accurate subsequent detection.

[0028] In some embodiments, such as Figure 1 and Figure 4 As shown, the electromagnet unit 21 on the electromagnetic sealing module 2 is equipped with a flexible sealing ring 22. The flexible sealing ring 22 ensures the sealing performance of the electromagnetic sealing module 2. The flexible sealing ring 22 adopts a double-layer structure, with an inner layer 220 and an outer layer 221. The inner layer 220 is made of fluororubber, which can withstand temperatures up to 200°C. The outer layer 221 is made of silicone foam, which has a compression rate of 40%. The thickness of the flexible sealing ring 22 is 8mm.

[0029] The working principle of the track defect detection device of this application is as follows: like Figures 1 to 9As shown, the vehicle is first started to pre-scan the detection area of ​​the track morphology, and the electromagnetic sealing module 2 is started to pre-adsorb, that is, an initial adsorption force of 25 N / unit is applied to scan the track surface morphology. The vehicle body 1 travels 10 meters at a speed of 0.5 m / s. The computer model generates a three-dimensional contour of the track surface. At this time, if a track joint is detected, it is automatically marked as a high-pressure compensation area.

[0030] Afterwards, dynamic sealing and cleaning are performed. The secondary sealing pressure of the electromagnetic sealing module 2 is activated, that is, the adsorption force is increased to 35 N / unit. The dust on the track surface of the detection area is cleaned and blown away by the water sprayer 31 and air sprayer 32 of the cleaning module 3. At the same time, the electromagnetic sealing module 2 dynamically adjusts the adsorption force according to the pre-scan data. That is, the adsorption force is maintained at 30 N / unit in the flat area of ​​the track, increased to 45 N / unit in the uneven area (height difference 1-3 mm), and reduced to 20 N / unit at the joint to prevent overpressure.

[0031] Next, vacuum establishment and data acquisition are performed. The vortex vacuum pump 5 is started to pump air to the reference vacuum level. Within 3 seconds, the detection chamber is pumped to -85 kPa. The pressure decay curve is collected through the pressure sensor 41 and active vibrator 42 of the data acquisition unit 4. That is, the pressure sampling rate is 100 Hz, and the pressure decay value ΔP within Δt=10 s is recorded. The active vibrator 42 is started simultaneously to record the characteristic peak value of the vibration signal. The trigger threshold is set to 0.5 g, which effectively filters out the environmental vibration caused by the passing train.

[0032] Next, the damage assessment and classification are performed using a computer data model, specifically a leak detection model, to output the damage level. If a damage is detected, the vehicle stops, and the detection process is repeated to determine the damage type. If no damage is detected, the vehicle continues driving. The specific calculation algorithm processing flow is as follows: 1. Calculate the leakage coefficient 2. If the pressure and time are roughly proportional: it is determined to be a through crack.

[0033] 3. If pressure and time exhibit a roughly exponential relationship: determine the damage type by analyzing the location of the characteristic peak values ​​in the vibration signal. 4. If pressure and time are unrelated: Trigger the sealing self-test program (shut down each electromagnet unit 21 one by one to check for leaks). Finally, the results are fed back and stored. The coordinates of the defects (combined with GPS positioning), type, and severity level are uploaded to the computer database, and detection report information can be generated based on location coordinates, defect type, crack volume, confidence level, etc.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A track defect detection device, characterized in that, Applied to rail transit infrastructure, including: Vehicle body; An electromagnetic sealing module is slidably installed at the bottom of the vehicle body. The electromagnetic sealing module has an array structure and is composed of several electromagnet units. A cleaning module, located on one side of the electromagnetic sealing module, is used to clean the rail transit infrastructure. A data acquisition unit is installed above the cleaning module, and the data acquisition unit and the electromagnetic sealing module are electrically connected.

2. The track defect detection device according to claim 1, characterized in that, It also includes a vortex vacuum pump, which is located on the side of the data acquisition unit away from the cleaning module.

3. The track defect detection device according to claim 1, characterized in that, The data acquisition unit includes a pressure sensor and an active vibrator. The active vibrator is installed on the vehicle body and receives vibration signals through the vibration sensor. The pressure sensor is embedded in the gaps between several of the electromagnet units and provides real-time feedback on the contact pressure distribution. Each of the electromagnet units is independently connected to the controller.

4. The track defect detection device according to claim 3, characterized in that, The vehicle body is equipped with a control module that is electrically connected to the electromagnetic sealing module. The control module is used to control the adsorption force of the electromagnet unit.

5. The track defect detection device according to claim 1, characterized in that, The cleaning module includes a water sprayer and a blower installed on the vehicle body. The water sprayer and the blower are both at an angle of 60 degrees to the vehicle body.

6. The track defect detection device according to claim 1, characterized in that, The electromagnetic sealing module is equipped with a flexible sealing ring, which includes an inner layer and an outer layer.

7. The track defect detection device according to claim 6, characterized in that, The inner layer is made of fluororubber, and the outer layer is made of silicone foam.

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