Multi-turn absolute type double-reading group combined photoelectric shaft angle encoder

Abstract

The invention discloses a multi-turn absolute type double-reading group combined photoelectric shaft angle encoder, and belongs to the technical field of photoelectric measurement. The encoder comprises a main shaft, a primary luminous panel, a primary coded disc, a primary slit, a primary receiver plate, an amplification circuit, a shaping and latch circuit, an analogue-to-digital conversion circuit, a data processing circuit, a secondary main shaft, a secondary luminous panel, a secondary coded disc, a secondary slit and a secondary receiver plate, wherein the front end of the main shaft is connected with the primary luminous panel, the primary coded disc, the primary slit and the primary receiver plate; the front end of the secondary main shaft is connected with the secondary luminous panel, the secondary coded disc, the secondary slit and the secondary receiver plate; the front end of the main shaft is connected with the tail end of the secondary main shaft; the primary and secondary receiver plates are connected with the amplification circuit which is connected with the shaping and latch circuit and the analogue-to-digital conversion circuit; and the shaping and latch circuit and the analogue-to-digital conversion circuit are connected with the data processing circuit. The encoder is compact in structure, small in volume and high in reliability and extensibility; the turn counting accuracy and reliability are improved; and the resolution is improved.

Description

technical field [0001] The invention relates to the technical field of photoelectric measurement, in particular to a multi-turn absolute double-group reading combined photoelectric shaft angle encoder. Background technique [0002] The photoelectric shaft encoder is a representative photoelectric displacement sensor for measuring angular displacement, and is widely used in national defense, industry and science and technology fields. [0003] According to different counting principles, photoelectric shaft encoders can be divided into absolute encoders and incremental encoders; incremental encoders use a uniformly depicted circular grating code disc, and the angle is realized by counting the output pulses of the circular grating. Or displacement measurement, which is characterized by simple structure and easy to achieve high-precision measurement, but if there is an angle or displacement change after power-off, it needs to find zero and restart counting after power-on. The a...

AI Technical Summary

Problems solved by technology

[0009] 2. When the resolution of the grating disc 2 is higher than that of the lap gear, an error code will appear at each lap transition edge

[0010] 3. There is only one set of photoelectric component reading mechanism, if there is luminescence, the aging or damage of the receiving tube will affect the reliability of the system

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