Electromagnetical multi-circle absolute value encoder

Abstract

The invention relates to an electromagnetic multi-turn absolute encoder. The encoder comprises a main encoder measuring spindle (1), a magnetic detection chip (4), a magnet (6), an encoder flange base (9) as well as a multi-turn gear set (2) arranged below the magnetic detection chip (4); the multi-turn gear set (2) is connected with a magnetic base (7) housing the magnet (6) by a gear connection mechanism (8); the encoder flange base (9) and the main encoder measuring spindle (1) passing through the encoder flange base (9) are arranged below the multi-turn gear set (2); the magnetic detection chip (4) is provided with a circuit board (5) with the functions of DSP data processing, CPU computation, memory cell EEROM and signal output; and a data connecting wire (3) connects the multi-turn gear set (2) with the circuit board (5). The electromagnetic multi-turn absolute encoder can effectively realize normal encoder use in severe environmental conditions such as vibration, smoke and dust and the like on the one hand, and realize multi-turn location value of a measured object on the other hand.

Description

technical field [0001] The invention relates to an encoder, in particular to a mechanical structure of an electromagnetic absolute value encoder. Background technique [0002] Generally, absolute encoders can be used for position measurement such as angles. Their composition and working principle are as follows: [0003] Absolute encoders are generally divided into single-turn and multi-turn. The working principle of a singleturn encoder is as follows figure 1 Shown: [0004] After the encoder is powered on, the light source 12 emits a light beam, which is concentrated by the shielding grating 13, then passes through the code disc 11 with regular bright and dark lines, and finally receives a set of on-off codes in the photoelectric receiving unit 14, which can be real reflects the current angle of the rotating shaft 10 . But in many occasions (such as the measurement of height and length), the working stroke of the equipment usually exceeds one turn, reaching the state o...

AI Technical Summary

Problems solved by technology

[0008] Although the encoder has good performance in vibration and dust environments, its limitation is that the magnetic core must be located below the magnetic detection chip. If the method of using the multi-turn gear set of the optical system is above the single-turn measurement, Multi-turn continuous measurement cannot be achieved because the magnetic core cannot pass through the circuit board

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