In the use of rotary encoders, resolution and accuracy are two completely different concepts. The resolution of the encoder is the minimum angle that can be read and output by the encoder. The corresponding parameters are: line number, pulse per revolution (PPR), minimum step, (Bit) and so on.
For the resolution and accuracy of the sensor to understand, you can take a micrometer as an example, the resolution on behalf of the micrometer can read up to a few decimal places, but the accuracy and ruler processing accuracy, measurement methods.
Similarly, in the use of rotary encoders, resolution and accuracy are two completely different concepts. The resolution of the encoder is the minimum angle that can be read and output by the encoder. The corresponding parameters are: line number, pulse per revolution (PPR), minimum step, (Bit) and so on.
The accuracy of the encoder is the accuracy of the actual angle measured by the signal data of the encoder. The corresponding parameters are angle ('), angle seconds ("). Resolution: line, which is the encoder's If the encoder is a direct square wave output, it is the number of pulses per revolution (PPR), but if it is sine and cosine (sin / cos) signal output, the signal can be analog quantitative electronic subdivision , To obtain more square wave pulse PPR output, the encoder square wave output A phase and B phase, A phase and B phase difference of 1/4 pulse period, through the rising edge and falling edge of the judge, you can get 1 / 4 pulse cycle of the change in step (4 octave), which is the minimum measurement step (Step), so strictly speaking, the minimum measurement step is the resolution of the encoder.
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