Encoder test apparatus and method

Details Encoder test apparatus and method Encoder test apparatus and method

G - Physics

01

M

G01M 11/00 (2006.01) G01D 18/00 (2006.01)

Patent

CA 2314254

Apparatus and method for testing an optical encoder used to determine position of a moveable member. The optical encoder supplies a first binary signal indicative of a position of the moveable member and a second binary signal indicative of the position. The first binary signal and the second binary signal are in quadrature relationship. The apparatus has a first delay device connected to receive the first binary signal. The first delay device produces a first delayed binary signal. The apparatus also includes a first logic gate connected to receive the first binary signal and the first delayed binary signal. The first logic gate produces a first edge detection pulse signal. The apparatus further includes a second delay device connected to receive the second binary signal. The second delay device produces a second delayed binary signal. The apparatus further includes a second logic gate connected to receive the second binary signal and the second delayed binary signal. The second logic gate produces a second edge detection pulse signal. The first edge detection pulse signal and the second edge detection pulse signal qualify the optical encoder.

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