Contact type absolute encoder signal collection apparatus and its production method

Abstract

The invention discloses a contact type absolute encoder signal acquisition device and a method for manufacturing the same and belongs to an absolute encoder signal acquisition device used in a rotation angular displacement measuring device. The acquisition device comprises an encoding drum wheel and a platiniridium wire brush head, wherein the wire brush head is overlapped on the drum wheel. A drum wheel type encoding disc is a cylinder, so the volume of the signal acquisition device is reduced greatly; the connecting points of the brush head are positioned in the working area of the external wall of the cylinder, the working area is divided into a conductive part and a non-conductive part which are arranged according to a encoding principle, and the brush head outputs a connection signal; and 'V'-shaped grooves are distributed on the external wall of the cylinder, the 'V'-shaped grooves are connected end to end, 'V'-shaped connecting points at the contact end part of the brush head operate in the 'V'-shaped grooves, the contact area is increased, the brush head moves in the 'V'-shaped grooves, and the operation is stable. The device and the method have the advantages that the signal acquisition device is simple in structure, acquires the signal directly from the encoding drum wheel and prevents the generation of error signals; and encoders manufactured by the method have small volumes.

Description

technical field [0001] The invention relates to an absolute encoder signal acquisition device used in a rotation angle displacement measurement sensor, in particular to a contact type absolute encoder signal acquisition device and a manufacturing method. Background technique [0002] At present, when people measure the shaft angular displacement, they use a contact type absolute encoder. The code disc of the contact type absolute encoder is generally disc type, and the encoder includes a disc type encoder disc, a V-shaped brush head, a brush frame; there are several concentric circle coding electrodes distributed according to the coding law on the disc-type code disc, and there is a common electrode, corresponding to the V-shaped electric brush head in contact with the code disc is the electrode for reading data, the number of electrodes How much is related to the number of bits of the encoder; the circular code disc rotates, and under the condition of applying voltage, it o...

AI Technical Summary

Problems solved by technology

Because this kind of encoder uses a chip code disc, it is difficult to read the signal due to the change of the diameter of the outer track and the innermost track; the diameter of the chip code disc cannot be reduced, and the encoder made of the chip code disc is large in size. In some occasions where the volume is strictly required, it cannot be used

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