Separate magnetic encoder based on code pattern

Abstract

The invention relates to a separate magnetic encoder based on a code pattern. Separately distributed magnetic sensing elements are utilized to read the code pattern information magnetized into multiple magnetic poles on a measured device, the code pattern information represents the rough position within the measurement range, and an interval represented by each coarse position is subdivided to obtain the high resolution and precision position information. The split magnetic encoder is advantaged in that the high-precision encoder is designed, the range and the use scope of the high-precision encoder are improved, and the overall cost and processing difficulty are greatly reduced.

Description

technical field [0001] The patent of the present invention relates to a device for position measurement, especially an encoder device for rotary and linear position measurement. Background technique [0002] When the object is rotating or linearly moving, in order to measure the position and motion state of the moving object, an encoder is generally used for measurement. The position data fed back by the encoder can be used by the host computer for position and speed closed-loop control, so as to obtain a better motion state of the object and have higher motion accuracy. [0003] Encoders have different implementation principles. The common position sensors on the market now include: photoelectric encoders, magnetic encoders, capacitive encoders, inductive encoders, resolvers, etc. These encoders with different principles have their own advantages. For example, the photoelectric encoder has high precision, and the magnetic encoder is resistant to pollution. [0004] The ou...

AI Technical Summary

Problems solved by technology

If the spacing and number of magnetic sensitive elements 4 in the chip are fixed, the spacing and number of magnetic poles on the magnetic ring are also determined, which will strictly limit the size of the magnetic ring and magnetic strip. device, you need to redesign the chip

[0009] and because the size of the chip is small, the pitch of the magnetic sensitive element 4 is extremely small, so that the minimum width of the magnetic poles on the magnetic ring is very small, which brings a relatively high Processing difficulty and cost, not suitable for mass use

[0010]The customized chips used in this way are extremely expensive and have a fixed scope of use. Inexpensive encoders with a wider range of applications are extremely needed in the market

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