The singnal processing of linear displacement sensor,

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Changchun Rongde Optics
Co.,Ltd.
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North Lake Development District,
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The singnal processing of linear displacement sensor,！

Changchun Rongde Optics Co.,Ltd. Release time：2017/2/27 Browse：874

In practical applications, the linear displacement sensor has two directions, that is, select a direction, the displacement is positive and negative points, so use a photoelectric sensor element to determine the moire fringe signal can not determine the direction of displacement. For the sake of discrimination, two Moire fringe signals with π / 2 phase difference are required. Two photoelectric elements are arranged at a distance of 1/4 pitch, and two electrical signals u01 and u02 with phase difference? / 2 are obtained, and two square wave signals u01 'and u02' are obtained after shaping. When the grating is moving forward, u01 is advanced by u02 and 90 degrees. When u02 is advanced, u02 is 90 degrees ahead. Therefore, the direction of the grating can be determined by circuit discrimination.

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