Title:
ROTATION SPEED MEASURING DEVICE AND METHOD EMPLOYING TWO SINUSOIDAL VARIABLE DENSITY FRINGES
Document Type and Number:
WIPO Patent Application WO/2018/161717
Kind Code:
A1
Abstract:
A rotation speed measuring device and method employing two sinusoidal variable density fringes, the device comprising: a two-sinusoidal variable density fringe sensor (4), a fringe image collection module, a fringe image transmission module, a fringe image processing software module, and a computer (1). The method comprises the following steps: covering a circumferential surface of a tested shaft (3) with the two-sinusoidal variable density fringe sensor (4); the fringe image collection module (6) performing real-time collection and recording of the two sinusoidal variable density fringes; the image transmission module transmitting a collected image of the two sinusoidal variable density fringes to the computer (1); and the image processing software module computing fringe density information of a left side fringe and a right side fringe of the two sinusoidal variable density fringes in each image, then computing a rotation angle corresponding to the shaft by means of density information of the left side fringe and the right side fringe, and finally computing the instantaneous rotation angular speed and the rotation speed of the shaft by means of a rotation angle difference and a sampling time interval between two consecutive images. The device and the method can be used to measure the absolute rotation angle of a shaft and can implement non-contact measurement of the rotation angle and the instantaneous rotation speed of a shaft. The measuring device is simple, quickly performs measurement, and has high accuracy.
Inventors:
ZHONG SHUNCONG (CN)
ZHONG JIANFENG (CN)
ZHANG QIUKUN (CN)
ZHONG JIANFENG (CN)
ZHANG QIUKUN (CN)
Application Number:
PCT/CN2018/071823
Publication Date:
September 13, 2018
Filing Date:
January 09, 2018
Export Citation:
Assignee:
UNIV FU ZHOU (CN)
International Classes:
G01P3/38; G01B11/26
Foreign References:
| CN106680529A | 2017-05-17 | |||
| CN206638694U | 2017-11-14 | |||
| CN206583924U | 2017-10-24 | |||
| CN106443046A | 2017-02-22 | |||
| CN105841620A | 2016-08-10 | |||
| CN2410643Y | 2000-12-13 | |||
| CN205642604U | 2016-10-12 | |||
| CN201489014U | 2010-05-26 | |||
| JP2013040820A | 2013-02-28 |
Attorney, Agent or Firm:
FUZHOU YUANCHUANG PATENT AND TRADEMARK AGENT LTD. (CN)
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