Optical encoder technology！

Commonly used optical encoder for the incremental photoelectric encoder, also known as photoelectric encoder, photoelectric pulse generator, optical pulse encoder, which turns the mechanical angle into electrical pulses, is commonly used in CNC machine tools an angular displacement detection Components, can also be used for angular velocity detection. From the name we can know, optical encoder is to detect the location of the signal through the light. A photoelectric encoder mainly contains four kinds of originals:
  • Light source (usually LED)
  • Sensors
  • Rotatable encoder disc
  • Mask the mask
In the axis of the code with the axis of coaxial test carved by a certain coding rules to form the shading and translucent track. One side of the code plate is a light-emitting LED, the other side is to receive light sensors. With the rotation of the measured axis, the code disc generates a discontinuity in the beam passing through the code wheel. The output of the specific electrical signal is generated by the reception of the optoelectronic device and the processing of the circuit, and the position and velocity information can be calculated by digital processing.
In the optical encoder for each sensor for a signal detection. A code can be used with two sensors to detect, the two sensors detect the signal will have a certain phase deviation. From this set of signals with phase difference we can get more information such as the direction of rotation. If we need a zero signal for the correction of the pulse count, there will usually be another track on the disk for generating the zero signal.
Optical phase array technology using optical encoder than the traditional design more reliable. Optical phase array technology, the principle is to collect the average of multiple signals as a signal, so the benefits of the signal is more stable and reliable collection, suitable for use in some of the more complex environments, such as mining, heavy machinery. Because in these environments vibration and shock will affect the traditional encoder signal acquisition. In addition the use of optical phase array encoder technology in the installation of the accuracy requirements of the optical encoder is lower than the traditional.

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