Photoelectric receiving sensor for incremental displacement measurement device

Abstract

The invention discloses a photoelectric receiving sensor for an incremental displacement measurement device. The photoelectric receiving sensor solves the problems that displacement measurement precision is low, maintenance and debugging of finished products cannot be realized and optical signals cannot be output stably for a long term. The photoelectric receiving sensor comprises a photoelectric detector array, a summator, subtracters and a gain-variable amplifying circuit, wherein the photoelectric detector array outputs sinusoidal current signals corresponding to the optical signals, the gain-variable amplifying circuit receives the sinusoidal current signals, amplifies the sinusoidal current signals and converts the sinusoidal current signals into voltage signals, the summator sums the voltage signals output by the gain-variable amplifying circuit so as to obtain a direct-current voltage signal, the subtracters convert the voltage signals output by the gain-variable amplifying circuit into sinusoidal signals or cosine signals. The photoelectric receiving sensor adapts to multiple light source requirements and can analyze displacement information amount precisely, influences caused by light source nonuniformity and distribution nonuniformity of the photoelectric detector array are obviously reduced, the optical signals can be output by a light source stably for long term, and the photoelectric receiving sensor is adjustable in gain and simple in structure.

Description

technical field [0001] The invention relates to the field of precision machining measurement, in particular to a photoelectric receiving sensor used for an incremental displacement measuring device. Background technique [0002] The photoelectric receiving sensor is an indispensable displacement measurement tool in precision machining measurement equipment. At present, according to the different material systems and principles used in the signal receiving sensor in the displacement measuring device, the signal receiving sensor mainly includes a potentiometer signal sensor, a metallic glass uranium signal receiving sensor, an electromagnetic signal receiving sensor and a photoelectric signal receiving sensor, etc. Several categories. Among them, the photoelectric signal receiving sensor is non-mechanical contact and has high reliability, so it has been widely used. The existing general photoelectric signal receiving sensors have the following deficiencies: the displacement ...

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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a photoelectric receiving sensor for incremental displacement measuring devices, which solves the problem that the existing photoelectric receiving sensor has low displacement measurement accuracy and is easily affected by the light source. Due to the influence of inhomogeneity and distribution inhomogeneity of the photodetector array, it is impossible to adjust the sensor according to the needs after the sensor is finished. The power value of the light source is demanding, and the light source cannot output light signals stably for a long time.

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