A portable vibration monitoring device for urban rail vehicles

Abstract

The utility model provides a portable urban rail vehicle vibration monitoring device, which is used to solve the technical problem that the existing vibration detection device does not have the function of measuring the vibration of the axle box and the bogie during operation. The utility model is provided with a vibration sensor module and a vibration data acquisition unit. The utility model has the functions of vehicle vibration signal acquisition, signal denoising, signal conversion and signal transmission, and transmits the collected vibration signal to the vibration data acquisition unit for signal filtering and AD conversion, and finally transmits the data to an external CNC analysis terminal by wire or wireless means. The utility model has the characteristics of flexible installation and layout, multiple acquisition channels, portability and high intelligence.

Description

Technical Field

[0001] The utility model relates to an urban rail transit vehicle monitoring system, in particular to a portable urban rail transit vehicle vibration monitoring device. Background Art

[0002] In urban transportation with a large population base, urban rail vehicles are becoming increasingly important in the field of urban public transportation due to their low degree of weather influence, strong carrying capacity, high safety, and easy time control. In the operation of urban rail vehicles, the requirements for vibration control are becoming increasingly higher. For example, how to measure and evaluate the riding comfort of passengers, whether the start and braking are smooth, whether there are bumps during operation, whether the meshing between the wheels and the track is normal, etc. are all closely related to vibration control.

[0003] At present, the commonly used evaluation standards in China are UIC513 "Criteria for Evaluation of Vibration Comfort of Passengers in Railway Vehicles" and "GB5595-85 Standard". The criteria provide the test conditions, basic algorithms and judgment criteria for comfort and stability.

[0004] Chinese patent CN101526427A discloses a handheld train comfort and stability tester that can collect data online in real time, but it does not have the function of measuring the vibration of the axle box and bogie during operation, and does not have the function of real-time calculation and analysis. Utility Model Content

[0005] The utility model aims to solve the technical problem that the existing vibration detection device does not have the function of measuring the vibration of the axle box and the bogie during operation, and proposes a portable urban rail vehicle vibration monitoring device.

[0006] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0007] A portable urban rail vehicle vibration monitoring device, which is special in that it includes a vibration sensor module and a vibration data acquisition unit;

[0008] The vibration sensor module includes one or more vibration sensors, which are installed on the vehicle and are used to collect vibration signals at different positions of the vehicle; the vibration sensors are installed in the axle box, bogie and / or body of the vehicle;

[0009] The vibration data acquisition unit comprises a chassis, a data acquisition board, a power supply module and a cover plate; the data acquisition board is located inside the chassis; the power supply module is installed inside the cover plate, and is used to supply power to the vibration data acquisition unit and the vibration sensor module; the cover plate is installed on the top of the chassis;

[0010] The data acquisition board includes an acquisition interface, a filtering module, an AD conversion module and a communication module which are connected in sequence; the acquisition interface includes one or more connection interfaces which are distributed on the side of the data acquisition board and are correspondingly connected to the vibration sensor to receive the vibration signal output by the vibration sensor; the filtering module is used to filter and remove noise from the vibration signal, and the AD conversion module is used to convert the vibration signal into a digital signal; the digital signal is transmitted to an external data analysis terminal through the communication module.

[0011] Furthermore, the data acquisition board also includes a WIFI communication module, which is connected to an external data analysis terminal in a wireless manner and is used to transmit the digital signal converted by the AD conversion module to the external data analysis terminal in a wireless manner.

[0012] Furthermore, the data acquisition board also includes a positioning module, which uses Beidou navigation to obtain the vehicle's location information; the positioning module is connected to the communication module and the WIFI communication module, and transmits the location information to an external data analysis terminal through the communication module or the WIFI communication module.

[0013] Furthermore, the vibration sensor module includes one or more three-axis acceleration sensors, the acquisition directions of the three-axis acceleration sensors include lateral, longitudinal and vertical directions, and the vibration signal is acceleration data.

[0014] Furthermore, the power supply module includes a lithium battery and a power management module connected to each other, the capacity of the lithium battery is 15000mAh, and the power management module is used for power display and charge and discharge management.

[0015] Furthermore, the voltage of the power supply module is DC12V; the range of the three-axis acceleration sensor is ±10g, and the sensitivity is 300mV / g.

[0016] Furthermore, the vibration sensor module includes three three-axis acceleration sensors, which are respectively arranged at the axle box, the bogie and the passenger seating position of the vehicle body on one side, and are used to collect vibration signals and damping performance data of the suspension system.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model is provided with a vibration sensor module and a vibration data acquisition unit. The utility model has the functions of vehicle vibration signal acquisition, signal denoising, signal conversion and signal transmission, and has the characteristics of flexible installation and arrangement, multiple acquisition channels and portability.

[0019] 2. The vibration sensor module of the utility model can be flexibly deployed, using one or a combination of multiple three-axis acceleration sensors arranged in positions such as the axle box position, bogie position, car body, and seat. The collected vibration signal is transmitted to the vibration data acquisition unit for signal filtering and AD conversion, and finally the data is transmitted to an external CNC analysis terminal by wire or wireless means. The utility model has the characteristics of collecting a lot of data, strong computing power, and can accurately and comprehensively collect vehicle vibration data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of an embodiment of a portable urban rail vehicle vibration monitoring device of the utility model;

[0021] Figure 2 This is a structural schematic diagram of a vibration data acquisition unit in an embodiment of a portable urban rail vehicle vibration monitoring device of the utility model;

[0022] Figure 3 The utility model is a top view of a data acquisition board in an embodiment of a portable urban rail vehicle vibration monitoring device.

[0023] 2-vibration data acquisition unit, 21-cover plate, 22-data acquisition board, 23-power supply module, 24-chassis; 222-acquisition interface, 223-filter module, 224-AD conversion module, 227-WIFI communication module, 228-positioning module, 229-communication module. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] The utility model discloses a portable urban rail vehicle vibration monitoring device, such as Figure 1 As shown, it includes a vibration sensor module that can be installed at different positions of the vehicle and a vibration data acquisition unit 2 installed in the vehicle body.

[0026] The vibration sensor module is used to collect acceleration data of the vehicle and transmit the collected acceleration data to the vibration data collection unit 2. In this embodiment, the vibration sensor module includes one or more three-axis acceleration sensors, the range of the three-axis acceleration sensor is ±10g, the sensitivity is 300mV / g, and the collection direction includes lateral, longitudinal, and vertical. The three-axis acceleration sensor can be installed in the axle box, bogie and / or body of the vehicle, and the arrangement form is flexible. During the driving of the vehicle, the three-axis acceleration sensor collects the longitudinal, lateral and vertical accelerations of the installation position respectively. The three-axis acceleration sensor is arranged at the axle box position, and the vibration of the axle box can be collected to obtain the lateral, longitudinal and vertical accelerations of the vehicle during driving; the three-axis acceleration sensor is arranged on the bogie to collect the lateral, longitudinal and vertical vibration of the bogie; the three-axis acceleration sensor is arranged inside the body to collect the vibration inside the body, which is used to analyze the riding comfort and stability of passengers; the three-axis acceleration sensor can be arranged at the axle box, bogie and body passenger seating position on one side at the same time to analyze the vibration and damping performance of the suspension system.

[0027] After the acceleration data is collected, it is transmitted to the vibration data collection unit 2 for filtering, conversion and other processing. Figure 2 As shown, the vibration data acquisition unit 2 includes a chassis 24, a data acquisition board 22, a power supply module 23 and a cover plate 21. The data acquisition board 22 is located inside the chassis 24; the power supply module 23 is used to power the data acquisition board 22 and the three-axis acceleration sensor, and the voltage is DC12V. The power supply module 23 is arranged on the inner side of the cover plate 21, and the cover plate 21 is installed on the top of the chassis 24. The power supply module 23 is composed of a lithium battery and a power management module. The capacity of the lithium battery is 15000mAh, and the power management module has functions such as power display and charge and discharge management.

[0028] like Figure 3As shown, the data acquisition board 22 includes multiple acquisition interfaces 222, a filter module 223, an AD conversion module 224, a WIFI communication module 227, a positioning module 228 and a communication module 229. Multiple acquisition interfaces 222 are distributed on the side of the data acquisition board 22, connected to the three-axis acceleration sensor, and receive the acceleration data collected by the three-axis acceleration sensor. The acquisition interface 222 transmits the received acceleration data to the filter module 223 for filtering, and after filtering, it is transmitted to the AD conversion module 224 to convert the acceleration data from an analog signal to a digital signal. The positioning module 228 adopts Beidou navigation to obtain the location information of the vehicle and transmit it to an external data analysis terminal. The AD conversion module 224 and the positioning module 228 are both connected to the WIFI communication module 227 and the communication module 229. The digital signal and the location information of the vehicle can be transmitted to an external data analysis terminal through the wired communication module 229, or can be wirelessly transmitted to an external data analysis terminal through the WIFI communication module 227. The communication module 229 is an M12 communication interface having functions such as software debugging, testing, and data reading.

[0029] The external data analysis terminal uses a single-chip microcomputer to process the digital signal and obtain vibration data. The single-chip microcomputer uses the STM32F103C8 chip, which has the advantage of fast processing speed. The signal processed by the single-chip microcomputer is stored in an external storage unit. The data analysis terminal also includes a display module for timely displaying the vibration data, and the display content includes the train number, starting point, speed, acceleration data, vibration frequency, vibration amplitude, etc.

[0030] The workflow of a portable urban rail vehicle vibration monitoring device provided by the utility model is as follows: first, the device is self-checked through an external data analysis terminal, and the vibration sensor is online, the equipment is online, Beidou is online, WIFI is online, etc. are checked respectively; then parameter settings are performed, including setting the type of vibration sensor and the collection position of the vibration sensor. After completing the above checks and settings, the vibration data acquisition unit 2 starts to collect vibration sensor data, transmits the collected data to the vibration data acquisition unit for filtering and A / D conversion, and transmits the position information and digital signals to the external data analysis terminal for processing and display.

Claims

1. A portable urban rail vehicle vibration monitoring device, characterized in that: It comprises a vibration sensor module and a vibration data acquisition unit (2); The vibration sensor module includes one or more vibration sensors, which are installed on the vehicle and are used to collect vibration signals at different positions of the vehicle; the vibration sensors are installed in the axle box, bogie and / or body of the vehicle; The vibration data acquisition unit (2) comprises a chassis (24), a data acquisition board (22), a power supply module (23) and a cover plate (21); the data acquisition board (22) is located inside the chassis (24); the power supply module (23) is installed inside the cover plate (21) and is used to supply power to the vibration data acquisition unit (2) and the vibration sensor module; the cover plate (21) is installed on the top of the chassis (24); The data acquisition board (22) comprises an acquisition interface (222), a filter module (223), an AD conversion module (224) and a communication module (229) which are connected in sequence; the acquisition interface (222) comprises one or more connection interfaces which are distributed on the side of the data acquisition board (22) and are correspondingly connected to the vibration sensor and are used to receive the vibration signal output by the vibration sensor; the filter module (223) is used to filter and remove noise from the vibration signal, and the AD conversion module (224) is used to convert the vibration signal into a digital signal; the digital signal is transmitted to an external data analysis terminal through the communication module (229).

2. A portable urban rail vehicle vibration monitoring device according to claim 1, characterized in that: The data acquisition board (22) further comprises a WIFI communication module (227), wherein the WIFI communication module (227) is connected to an external data analysis terminal in a wireless manner, and is used to transmit the digital signal converted by the AD conversion module (224) to the external data analysis terminal in a wireless manner.

3. A portable urban rail vehicle vibration monitoring device according to claim 2, characterized in that: The data acquisition board (22) further comprises a positioning module (228), wherein the positioning module (228) adopts Beidou navigation and is used to obtain the position information of the vehicle; the positioning module (228) is connected to the communication module (229) and the WIFI communication module (227), and transmits the position information to an external data analysis terminal through the communication module (229) or the WIFI communication module (227).

4. A portable urban rail vehicle vibration monitoring device according to claim 3, characterized in that: The vibration sensor module includes one or more three-axis acceleration sensors, the acquisition directions of the three-axis acceleration sensors include horizontal, longitudinal and vertical directions, and the vibration signal is acceleration data.

5. A portable urban rail vehicle vibration monitoring device according to claim 4, characterized in that: The power supply module (23) comprises a lithium battery and a power management module which are connected to each other. The capacity of the lithium battery is 15000 mAh. The power management module is used for power display and charge and discharge management.

6. A portable urban rail vehicle vibration monitoring device according to claim 5, characterized in that: The voltage of the power supply module (23) is DC12V; the measuring range of the three-axis acceleration sensor is ±10g, and the sensitivity is 300mV / g.

7. A portable urban rail vehicle vibration monitoring device according to claim 3, characterized in that: The vibration sensor module includes three triaxial acceleration sensors, which are respectively arranged at the axle box, bogie and passenger seating position on one side of the vehicle body, and are used to collect vibration signals and damping performance data of the suspension system.

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