Absolute type single-ring eccentric code channel encoder

Abstract

The invention relates to an absolute signal loop eccentric encoder in the field of optical-electricity measuring theology. It arranges the code disk and the slit disk coaxially; the code disk is connected with the main axle and can rotates with the main axle; the slit disk can do relatively rotating with the code disk; the code path of the code disk is an eccentric optical area between two circles which is a single loop eccentric code path; the silt possesses four slits with 90 degree which are separately correspondence with the single loop eccentric code path of the code disk. The encode disk can output multidigit absolute code, and can adopt single loop optical area to condense the size of the code disk, which creates a condition for the super small absolute encoder.

Description

technical field [0001] The invention belongs to an absolute single-circle eccentric code track encoding disc in the technical field of photoelectric measurement. technical background [0002] The photoelectric shaft encoder is a representative photoelectric angle measuring device for measuring angular displacement, and the core component of the photoelectric shaft encoder is the optical encoder disc, which is formed by matching the code disc and the slit disc. [0003] The closest existing technology to the present invention is the patent of Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. The patent name is: absolute matrix encoder disk, the patent number is: ZL00264312.X, and the date of authorization announcement is September 26, 2001. day. As shown in Figure 1 and Figure 2, Figure 1 is a code wheel, including a code wheel base 1, a code wheel center hole 2, and a 180°-360° optical area code track 3. Figure 2 is a slit plate, inclu...

AI Technical Summary

Problems solved by technology

[0005] The main problem of this kind of code disc is that it can only output four absolute codes, and the structure is complex. If you want to increase the number of output digits, you must increase the number of engraved circles, so it is impossible to reduce the volume.

Therefore, it is impossible to achieve ultra-miniaturization of the encoder made with this encoder disk

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