Automatic zeroing method and equipment for incremental sensor

Abstract

The invention relates to an automatic zeroing method and automatic zeroing equipment for an incremental sensor. The method comprises the following steps of: (1) arranging a zero point detection device at the middle position of a motion stroke; (2) symmetrically arranging switches W+ and W- in the stroke directions on the two sides of a zero point; (3) arranging a zero point-centered baffle sheet on a rotating body, wherein a signal is 1 when a photoelectric switch is baffled by the baffle sheet, while the signal is 0 when the photoelectric switch is not baffled by the baffle sheet; (4) continuously detecting the values of the W+ and W- during zero-crossing by an electric control system; (5) continuously checking a zero point signal, zeroing the reading of an angular sensor when the zero point signal takes effect, or automatically zeroing the reading of the angular sensor by hardware when the zero point signal takes effect; and (6) indicating that zeroing fails if detecting that the states of the W+ and W- are changed into 01 from 10, or 10 from 01 but not detecting the zero point signal during the zero-crossing, and zeroing again. The method and the equipment overcome the defects of the prior art and can quickly judge the zeroing direction, shorten a redundancy stroke and realize high-efficiency automatic zeroing.

Description

technical field [0001] The invention belongs to the field of electromechanical integration instruments and equipment, and in particular relates to a method for automatic zero return of an incremental sensor and equipment thereof. Background technique [0002] The electromechanical system of position closed-loop control generally uses some kind of angle detection device (such as shaft angle encoder, etc.) to measure the current rotation angle of the moving parts. The shaft angle detection device can be divided into two categories: absolute sensor and incremental sensor. The data measured by the absolute sensor is always the current rotation angle of the moving body, and does not need a reference to the zero point; while the data measured by the incremental sensor is the angle of the moving body from the zero point. When the system is powered off or the measurement result is due to some After the cause is wrong, it must be turned back to the zero point (it can be judged by the...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the "manual judgment method" is that it must be operated by someone, which is inefficient, error-prone, and has high requirements for the operator. In addition, the site of many equipment is unmanned or difficult to reach, so it is only suitable for low-end products with low performance.

The disadvantage of the "fixed direction method" is that it does not refer to the current position of the moving body at all, resulting in low efficiency, wasting time and power, and for important equipment, this unnecessary waste of time cannot be tolerated

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