Portable comprehensive detection device for overhead line system

Abstract

The utility model provides a portable comprehensive detection device for an overhead line system, and belongs to the field of overhead line system detection. The device comprises a vehicle body, a laser scanning sensor, a speed sensor, a power module, a driving module and a data terminal. The output end of the power module is connected with the driving module, and the output end of the driving module is connected with a wheel driving motor of the vehicle body. The sensor module is connected with the data terminal, and is connected with the laser scanning sensor and the speed sensor through an RJ232 network cable. The power supply module adopts a lithium battery, has multiple power supply output modes, and can meet the power requirements of different devices. The driving module adopts a direct-current motor driver, and the power module drives direct-current motors of the wheels to rotate through the direct-current motor driver. The portable comprehensive detection device for the contact network is compact in structure and convenient to carry and use, can accurately detect the state of the contact network, and improves the detection precision and efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of contact network detection, and more specifically relates to a portable contact network comprehensive detection device. Background Art

[0002] The overhead contact network in electrified rail transit is a special form of transmission line. Its main purpose is to provide reliable and uninterrupted power supply for electric locomotives. In modern electrified rail transit, the overhead contact network is an important part of the traction power supply and transformation system. The electric locomotive contacts the overhead contact network through the pantograph on its roof to obtain electrical energy and generate power. The operating status of the overhead contact network directly affects the power quality of the electric locomotive. As an important component, the status monitoring and maintenance of the overhead contact network is crucial.

[0003] Disadvantages of existing technology:

[0004] The traditional contact network detection method is mainly through contact detection, that is, the detection device is directly in contact with the contact line for measurement. This method has the following problems: (1) low efficiency, many parameters cannot be directly obtained, and some conversion is required; (2) low safety factor, workers work in a high-voltage environment, need safety protection, and high risk; (3) low detection accuracy, easily affected by environmental factors (insulating rod deadweight, wind, humidity, etc.). In addition, non-contact detection methods, such as measurement based on ultrasonic principles and measurement based on image processing, have problems such as large impact on the detection results due to environmental factors such as temperature, humidity, atmospheric pressure, etc., rapid aging of equipment, or high insulation requirements for camera components and high-voltage isolation circuits.

[0005] Therefore, the existing technology cannot meet the needs of efficient and accurate detection of the contact network status. It is urgent to develop a new type of high-precision, convenient non-contact contact network detection device to improve detection efficiency, reduce operational risks and improve detection accuracy. Summary of the invention

[0006] The main technical problem solved by the utility model is how to effectively improve the efficiency and accuracy of contact network detection and reduce operational risks, while overcoming the problems existing in traditional contact detection and non-contact detection methods, and providing a new type of high-precision and convenient non-contact contact network detection device to meet the actual needs of electrified rail transit operation.

[0007] In order to achieve the above-mentioned purpose, the utility model is implemented by adopting the following technical scheme: the device comprises a vehicle body, a sensor module, a power module, a drive module, and a data terminal, wherein the sensor module, the power module, and the data terminal are installed on the vehicle body;

[0008] The output end of the power module is connected to the drive module, and the output end of the drive module is connected to the wheel drive motor of the vehicle body;

[0009] The sensor module is connected to the data terminal.

[0010] In one embodiment, the sensor module includes a laser scanning sensor and a speed sensor. The laser scanning sensor is installed on the top of the vehicle body through a bracket, and the speed sensor is installed on the front end of the vehicle body.

[0011] In one solution, the data terminal is a notebook computer, which is installed on the rear of the vehicle body through a bracket.

[0012] In one embodiment, the data terminal is connected to the laser scanning sensor via an RJ232 network cable and is connected to the speed sensor via a USB.

[0013] In one embodiment, the power module uses a lithium battery and has multiple power supply output modes of 5V, 12V, and 24V. The 5V output is connected to the speed sensor power supply port, the 12V output is connected to the laser scanning sensor power supply port, and the 24V output is connected to the laptop power supply port and the drive module power supply port.

[0014] In one embodiment, the driving module adopts a DC motor driver, and the power module drives the DC motor of the wheel to rotate through the DC motor driver.

[0015] Beneficial effects of the utility model:

[0016] 1. Improve detection efficiency: The intelligent detection system based on laser scanner, speed sensor 7 and laptop computer can realize non-contact collection of contact network parameters, sampling point positioning and data processing, which greatly improves the detection efficiency.

[0017] 2. Improve detection accuracy: Through the precise measurement of the laser scanning system, the measurement accuracy reaches ±10mm, which significantly improves the detection accuracy of the contact network geometric parameters.

[0018] 3. Reduce operational risks: The device can be installed on the roof of a locomotive or used in an automatic mode, effectively reducing the operational risks of workers in a high-pressure environment.

[0019] 4. Convenient real-time monitoring: The data terminal uses a laptop computer, which can conveniently receive and process data in real time, and monitor and analyze the contact network status in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the utility model device;

[0021] Figure 2This is the detection principle diagram of the utility model.

[0022] In the figure: 1-vehicle body, 2-sensor module, 3-power module, 4-drive module, 5-data terminal, 6-laser scanning sensor, 7-speed sensor, 8-wheel. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0024] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] like Figure 1 As shown, the device includes a vehicle body 1, a sensor module 2, a power module 3, a drive module 4, and a data terminal 5. The sensor module 2, the power module 3, and the data terminal 5 are installed on the vehicle body 1; the output end of the power module 3 is connected to the drive module 4, and the output end of the drive module 4 is connected to the wheel 8 drive motor of the vehicle body 1; the sensor module 2 is connected to the data terminal 5.

[0027] The sensor module 2 includes a laser scanning sensor 6 and a speed sensor 7. The laser scanning sensor 6 is mounted on the top of the vehicle body 1 through a bracket, and the speed sensor 7 is mounted on the front end of the vehicle body 1. The laser emitting end of the laser scanning sensor 6 is perpendicular to the vehicle body and faces upward.

[0028] Laser scanning sensor 6: Laser scanning sensor 6 adopts a non-contact measurement method, which can directly measure the contact network and provide accurate and reliable data. Moreover, laser scanning sensor 6 is not greatly affected by the environment, and the measurement results are relatively stable. The collected parameters can be used to judge the wear and deformation of the contact network, as well as the maintenance and repair of the contact network, to provide guarantee for the normal operation of high-speed rail. The DT50 series laser distance sensor of SICK of Germany is selected, which has extremely high measurement accuracy and stability.

[0029] Speed ​​sensor 7: Speed ​​sensor 7 is mainly used to measure the running speed of the portable contact network comprehensive detection device. During the detection process, it needs to work with the laser scanning sensor 6 to determine the exact position of each point of the contact network. It has the characteristics of accurate measurement results, fast response speed, and good stability, so it can effectively improve the accuracy and efficiency of contact network geometric parameter detection. Honeywell's SS500 series Hall effect speed sensor 7 has a wide operating voltage range and excellent stability.

[0030] The data terminal 5 is a notebook computer, which is installed on the rear of the vehicle body 1 through a bracket. The data terminal 5 is connected to the laser scanning sensor 6 and the speed sensor 7 through an RJ232 network cable.

[0031] The power module 3 uses a lithium battery and has multiple power supply output modes of 5V, 12V, and 24V. The 5V output is connected to the power supply port of the speed sensor 7, the 12V output is connected to the power supply port of the laser scanning sensor 6, and the 24V output is connected to the power supply port of the laptop computer and the power supply port of the drive module 4.

[0032] The driving module 4 uses a DC motor driver, and the power module 3 drives the DC motor of the wheel 8 to rotate through the DC motor driver. The DRV8833 series dual-channel DC motor driver of TI Company of the United States is selected, which has the characteristics of high efficiency, energy saving, overheating and overcurrent protection. The driving module 4 controls the operation of the portable contact network comprehensive detection device. It is directly connected to the driving motor of the vehicle body 1. According to the instructions of the power module 3 and the data terminal 5, the detection device is driven to move along the contact network line. The operation of the driving module 4 directly affects the data acquisition speed and accuracy of the laser scanning sensor 6 and the speed sensor 7.

[0033] Working principle of the utility model: when the power module 3 is started, the generated electric energy will continue to be transmitted to the driving module 4, and the driving module 4 will drive the motor of the wheel to rotate, so that the portable detection device can be moved. At the same time, it will also be used to power the laser scanning sensor 6 and the speed sensor 7.

[0034] The laser scanning sensor 6 and the speed sensor 7 start to operate and collect data after being powered. Through a specially designed bracket structure, the laser scanning sensor 6 will be installed on the top of the vehicle body 1 to detect various parameters of the contact network. The speed sensor 7 is installed at the front end of the vehicle body 1 to detect the driving speed of the vehicle body 1.

[0035] The collected laser scanning and speed data will be sent to the data terminal 5 in real time. In the present invention, a laptop is used as the data terminal 5, which is connected to the laser scanning sensor 6 via an RJ232 network cable and to the speed sensor 7 via a USB, so as to analyze and process the collected data in real time, and finally present the test results to facilitate the staff to view and employ them.

[0036] The lead height is the vertical distance from the contact wire to the rail plane, and the pull-out value is the horizontal distance from the contact wire to the center of the pantograph. The lead height and pull-out value are the core parameters of the contact network detection. The calculation principle is as follows: Figure 2 According to the definition of conductor height and the calculation principle diagram, the calculation formula of contact network conductor height is as follows:

[0037] H j =H0+h=H0+s*sinα

[0038] Where Hj represents the rail height (mm); H0 represents the distance between the laser source of the laser scanner and the rail surface (mm); h represents the vertical distance between the laser source and the contact line (mm); s represents the distance between the laser source and the contact line (mm); α represents the angle of the contact line relative to the starting scanning angle of the laser scanner (°).

[0039] Reasonable setting of the pull-out value can avoid various pantograph-net accidents, so physical analysis of the pull-out value is particularly important. The calculation formula of the pull-out value is as follows:

[0040] a=s*cosα

[0041] Where a represents the pull-out value (mm), a positive value represents the left side of the line centerline, and a negative value represents the right side of the line centerline; s represents the distance between the laser source and the contact line (mm); α represents the angle between the contact line and the starting angle of the laser source scan (°).

[0042] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A portable contact network comprehensive detection device, characterized in that: The device comprises a vehicle body (1), a sensor module (2), a power module (3), a drive module (4), and a data terminal (5); the sensor module (2), the power module (3), and the data terminal (5) are installed on the vehicle body (1); The output end of the power module (3) is connected to the drive module (4), and the output end of the drive module (4) is connected to the drive motor of the wheel (8) of the vehicle body (1); The sensor module (2) is connected to a data terminal (5); The sensor module (2) comprises a laser scanning sensor (6) and a speed sensor (7); the laser scanning sensor (6) is mounted on the top of the vehicle body (1) via a bracket, the laser emitting end of the laser scanning sensor (6) is perpendicular to the vehicle body and faces upward, and the speed sensor (7) is mounted on the front end of the vehicle body (1); The data terminal (5) is a laptop computer, which is installed on the rear part of the vehicle body (1) via a bracket; The data terminal (5) is connected to the laser scanning sensor (6) via an RJ232 network cable and is connected to the speed sensor (7) via a USB; The power supply module (3) uses a lithium battery and has multiple power supply output modes of 5V, 12V, and 24V. The 5V output is connected to the power supply port of the speed sensor (7), the 12V output is connected to the power supply port of the laser scanning sensor (6), and the 24V output is connected to the power supply port of the notebook computer and the power supply port of the drive module (4).

2. A portable contact network comprehensive detection device according to claim 1, characterized in that: The driving module (4) adopts a DC motor driver, and the power supply module (3) drives the DC motor of the wheel (8) to rotate through the DC motor driver.

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