Novel Absolute Displacement Sensor with Wide Range Based on Malus Law

Sensors

Wei Li¹  Xiaoping Lu¹ 

[1] The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;

关键词: displacement sensor;    wide range;    polarized light;    light source drift;    absolute measurement;   

DOI  :  10.3390/s91210411

来源: mdpi

【 摘 要 】

The paper presents a novel wide range absolute displacement sensor based on polarized light detection principle. The sensor comprises of two sets of polarized light detecting systems which are coupled by pulleys. The inherent disadvantage in optic system like light source intensity drift is solved and absolute measurement with wide-range is achieved. A prototype and the relevant test bed have been built. The test results are in good agreement with expectation. Its measurement range is 540 mm, and its linearity is better than 0.05%.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.