Gray code technique

Fig. 7.11.8 Steering-angle sensor using Gray code technique [15]...

In contrast to the sensor principle described above, there is a solution that uses a Gray code encoding technique in combination with several light barriers, as shown in Fig. 7.11.8. The upper rotating disc carries teeth and gaps encoded as a 6-bit Gray code. All transmitter and receiver elements are assembled in the stator, which forms a set of optical barriers [15]. 

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