Device and method for measuring urban rail wheel parameters based on laser displacement sensor

A laser displacement and parameter measurement technology, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of inability to realize the integration of wheel parameter measurement, inability to detect wheel diameters, etc., to achieve storage and transmission, easy to carry, measurement high precision effect

Inactive Publication Date: 2015-11-11
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Chinese patent CN103738358 (portable railway wheel tread parameter detector, application number 201310731824.1, application date: 2013-12-26) discloses a wheel tread parameter detection device, which can

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  • Device and method for measuring urban rail wheel parameters based on laser displacement sensor
  • Device and method for measuring urban rail wheel parameters based on laser displacement sensor
  • Device and method for measuring urban rail wheel parameters based on laser displacement sensor

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Embodiment 1

[0056] combine Figure 5 , each part of the circuit is specifically as described in (1) to (5) below:

[0057] (1) The wheel rim tread measurement module circuit, the PWM signal output by the ARM embedded main control module is 3.3V, and the stepper motor driver requires the input of a 5V PWM signal, so the PWM signal output by the ARM embedded main control module is output through 74HCT244D For conversion, the converted PWM signal is connected to the stepper motor through two pins.

[0058] (2) ARM embedded main control module circuit. The main control chip is STM32F103C8T6 single chip microcomputer produced by STMicroelectronics. The module circuit includes an external 8M crystal oscillator circuit, reset circuit, SWD program debugging circuit, and startup mode selection circuit.

[0059] (3) The interactive module circuit, the XPT2046 chip is connected to the five I / O ports of the main control chip for communication, and the BL32007 chip is connected to the I / O port of the...

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Abstract

The invention discloses a device and a method for measuring urban rail wheel parameters based on a laser displacement sensor. The device comprises a wheel flange and tread measurement module, an ARM embedded main control module, an interaction module, a data storage module, a USB communication module and a power supply module. The wheel flange and tread measurement module detects the coordinate of a wheel tread by means of a laser displacement sensor. The ARM embedded main control module conducts the curve-fitting treatment on the detected coordinate of the wheel tread so as to obtain the profile curve of a wheel. After that, the ARM embedded main control module figures out the height of a wheel flange, the thickness of the wheel flange, the diameter of the wheel and other wheel parameters based on the geometrical relationship thereof. The interaction module displays the profile curve of the wheel and wheel parameters. The data storage module stores measurement data and wheel parameters. A host computer acquires wheel parameters to further analyze the wheel parameters through the USB communication module. The power supply module powers up the entire device. According to the technical scheme of the invention, the device can measuring urban rail wheel parameters in the wheel non-dropping condition, thus having the advantages of convenience, high speed, high accuracy, simplicity and practicability.

Description

technical field [0001] The invention relates to the technical field of railway vehicle detection, in particular to an urban rail wheel parameter measurement device based on a laser displacement sensor. Background technique [0002] As an extremely important part of the running part of the vehicle, the wheel set not only bears the entire weight of the vehicle body, but also is responsible for transmitting the force between the wheel set and the rail. The wheel set needs to withstand large static load and dynamic load, assembly stress, thermal stress generated by brake shoes and brake pads during braking, and centrifugal force when passing through the curve, etc. Therefore, whether the wheelset maintains a good technical condition is related to the absolute safety of driving. In view of the importance of the wheel set to the safe operation of the train, accurately measure the parameters such as the thickness of the wheel rim, the height of the rim, the vertical wear, the wear...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/06G01B11/08G01B11/24
Inventor 谢海椿邢宗义杨静石奋义张永戴硕江飞
Owner NANJING UNIV OF SCI & TECH
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