Portable wheel diameter measuring device and measuring method

A diameter measurement, portable technology, applied in the field of geometric measurement, can solve problems such as measurement error

Active Publication Date: 2019-05-21
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wheel diameter measurement based on the tread profile requires multiple measurements to improve the measurement accuracy, and each measurement will introduce measurement errors due to tread positioning errors

Method used

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  • Portable wheel diameter measuring device and measuring method
  • Portable wheel diameter measuring device and measuring method
  • Portable wheel diameter measuring device and measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] Such as Figure 1~3 As shown, a portable wheel diameter measuring device includes: a housing 1, a display unit and a data processing unit arranged in the housing 1, a battery, a positioning unit, a one-dimensional translation mechanism 4, a one-dimensional positioning sensor 3 and a one-dimensional measurement Proximity sensor 2;

[0038] in:

[0039] The one-dimensional ranging sensor 2 is installed on the one-dimensional translation mechanism 4, and the one-dimensional translation mechanism 4 can be translated in a straight line to drive the one-dimensional ranging sensor 2 to move in a straight line and to measure the rolling circle. The distance between the last arc 9 and the one-dimensional translation mechanism 4;

[0040] The positioning unit is used to locate the device on the circumferential surface of the measured wheel 8 so that the measuring point of the one-dimensional ranging sensor 2 is located on an arc 9 on the rolling circle and the maximum of the on...

Embodiment approach 2

[0055] Such as Figure 1~3 As shown, a portable wheel diameter measuring device of this embodiment is the same as Embodiment 1.

[0056] The portable wheel diameter measurement method of this embodiment comprises the following steps:

[0057] Step 1, installation: the portable wheel diameter measuring device is fixed on the measured wheel 8 through the positioning unit;

[0058] Step 2, scanning measurement: the one-dimensional translation mechanism 4 drives the one-dimensional distance measuring sensor 2 to move. The distance between the mechanisms 4 is measured by the one-dimensional positioning sensor 3 to obtain the position of the translation mechanism 4, and the data of the two sensors correspond one by one to form the contour data of an arc 9 on the rolling circle;

[0059] Step 3, fit the circle to calculate the diameter: such as Figure 5 As shown, according to the arc profile data, the least square method is used to fit the equation of the rolling circle, so as to...

Embodiment approach 3

[0061] Such as Figure 7-8 As shown, a portable wheel diameter measuring device includes a housing 1, a display unit and a data processing unit, a battery, a positioning unit and a two-dimensional laser sensor 7 arranged in the housing 1;

[0062] in:

[0063] The housing, data processing unit, display unit, battery, and positioning unit are the same as those in Embodiment 1;

[0064] The two-dimensional laser sensor 7 directly measures the contour data of an arc at a distance of 70 mm from the inner surface of the wheel.

[0065] Next, the method of using the above-mentioned portable wheel diameter measuring device to realize the direct offline measurement of the wheel is introduced, including the following steps:

[0066] Step 1, installation: the portable wheel diameter measuring device is fixed on the measured wheel 8 through the positioning unit;

[0067] Step 2, measurement: obtain the contour data of a section of arc 9 at a distance of 70 mm from the inner surface of...

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Abstract

The invention relates to a portable wheel diameter measuring device. The portable wheel diameter measuring device comprises a housing, a display unit, and a data processing unit, a positioning unit, a one-dimensional translational mechanism, a one-dimensional positioning sensor and a one-dimensional ranging sensor which are arranged inside the housing, wherein the one-dimensional translational mechanism can do rectilinear translation to drive the one-dimensional ranging sensor to do rectilinear movement; the positioning unit is used for positioning the portable wheel diameter measuring device on the circumferential surface of a wheel to be measured, so that a measuring point of the one-dimensional ranging sensor is positioned on an arc, a line segment formed by the maximum stroke of the one-dimensional translational mechanism is vertical to the axial direction of the wheel to be measured, and a connecting line between the midpoint of the line segment and the circular center of a rolling circle is vertical to the line segment; the one-dimensional positioning sensor is used for measuring the movement direction of the one-dimensional translational mechanism. The invention further relates to a measuring method using the portable wheel diameter measuring device. Through the portable wheel diameter measuring device and the measuring method, provided by the invention, off-line, precision and quick measurement of the diameter of a locomotive wheel can be achieved.

Description

technical field [0001] The invention belongs to the technical field of geometric measurement, and relates to a portable wheel diameter measurement method and a measurement device. Background technique [0002] Regular detection of train wheel set parameters is one of the necessary means to ensure the safe operation of rail transit. At present, the wheel set parameter automatic measurement system and the portable wheel set parameter measuring instrument are two development directions in this field. [0003] The diameter of the train wheel is the diameter of the rolling circle (the circle formed by the intersection of the plane parallel to the inner surface of the wheel and 70 mm away from the wheel tread) as its nominal value, which is an important index in the parameters of the wheel set. The traditional wheel diameter measuring ruler is still widely used because it is not limited by the site. However, the traditional wheel diameter measuring ruler has problems such as lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61K9/12G01B21/10
CPCB61K9/12G01B21/10
Inventor 冯其波杨婧
Owner BEIJING JIAOTONG UNIV
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