Question 2: An absolute angular encoder comprises of the same number of LED and photo-transistor ...
Question 2: An absolute angular encoder comprises of the same number of LED and photo-transistor combination as the number of tracks. Consider the absolute angular encoder in Figure 3 where the white slits allow the light from the LED to travel to the photo-transistor when turns on (logic 1) When the light does not reach the photo-transistor, it is in off state (logic 0). In the configuration shown in Figure 3a, the LED and photo-resistor combinations are denoted by black...
the magnitude and direction of the relative change in angle. Consider the relative optical encoder with N -16 slits as shown in Figure 4. The encoder has two photo-transistor sensors A and B that sense the light from their corresponding LEDs that are placed such that the distance between them is half the distance between the slits. B A 0 : clock:Π Π Π Π Π Π Π 0 2 time ( uni-2 fc)12 13 (b) Encoder A, B and...