Rotary Encoder for All-optical Fiber Transmission

Abstract

The invention provides an all-optical fiber transmission type rotary coder. A rotating shaft is arranged in a sealed shell, an optical coding disc is fixed on the rotating shaft, a plurality of optical coding rails are formed in the optical coding disc, one ends of optical fiber sets at a light-emitting end and a receiving end are respectively in suspended correspondence with each optical coding rail, the other ends of the optical fibers at the light-emitting end and the receiving end are led out of the shell and are connected to a photoelectric coupling circuit, distant from an interference source, via transmission cables so as to output correct electrical signal codes. The all-optical fiber transmission type rotary coder has the advantages of all-optical energy and information transmission, no electrical signals, no electric parts, best anti-electromagnetic interference capability, light weight, good anti-seismic property and high practical value.

Description

technical field [0001] The technical field of the photoelectric rotary encoder of the present invention particularly relates to an all-optical optical fiber transmission rotary encoder, which adopts an all-optical structural design without electrical components, and the coded information will not be interfered by various electromagnetic signals at all. Background technique [0002] A rotary encoder is a sensor that detects the physical quantity of an object's rotation. As long as the electrical energy is input, there will be an output electrical pulse that can directly enter the digital system, which can measure the angle of rotation of the object, the number of turns, and the angular velocity of rotation, etc.; It is stable in operation and widely used in rotating systems or systems where rotation is converted to translation. However, in practical applications, the existing rotary encoders have cables, which are usually installed on rotating equipment very close to the moto...

AI Technical Summary

Problems solved by technology

However, in practical applications, the existing rotary encoders have cables, which are usually installed on rotating equipment very close to the motor. When the equipment is running, there will be extremely strong interference in the motor and its control equipment and power cables. The signal will cause irresistible interference to the internal circuit of the encoder or the cable connected to it; or the electrostatic discharge generated during the operation of the equipment or the lightning in the air will hit the encoder; or all possible interference will be along the encoder cable, These will cause unpredictable errors in the encoder-based electronic system, seriously affecting safe production

It is difficult to eliminate the interference in principle because the existing encoder needs to be energized and has a cable, so it is necessary to propose an improvement

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