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Angular position sensor based on photoelectric detector and measuring method of sensor

A photoelectric detector and angular position technology, which is applied in the direction of transmitting sensing components, measuring devices, measuring heat, etc. by using optical devices, can solve the problems of manual calibration and inconvenient use, and achieve the effect of reducing distortion and ensuring real-time performance

Active Publication Date: 2020-11-27
北京市汉华环球科技发展有限责任公司
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Problems solved by technology

In order to ensure the measurement accuracy, the existing light-shielding angle sensor requires frequent manual calibration, which is inconvenient to use

Method used

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  • Angular position sensor based on photoelectric detector and measuring method of sensor
  • Angular position sensor based on photoelectric detector and measuring method of sensor

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Embodiment Construction

[0035] refer to Figure 1-2 , a specific embodiment of the present invention includes,

[0036] Four fan-shaped photodetectors 1 that are symmetrical around the same axis are used to receive light to generate induced currents. Two non-adjacent fan-shaped photodetectors 1 are connected in series to form a group, and the two groups of fan-shaped photodetectors output two induction currents respectively. current value;

[0037] LD laser diode 2, located on the axis of the four fan-shaped photodetectors 1, is used to emit laser light to the light-receiving surface of the fan-shaped photodetector 1;

[0038] The temperature sensor 3 is used to measure the temperature of the sector photodetector 1;

[0039] Two light-shielding sheets 4 coaxially arranged with the four fan-shaped photodetectors 1, the two light-shielding sheets 4 are fixed on the rotation axis 5 to be measured, the two light-shielding sheets 4 are arranged symmetrically, and the light-shielding sheets 4 are located...

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Abstract

The invention discloses an angular position sensor based on a photoelectric detector. The sensor comprises four fan-shaped photoelectric detectors which are symmetrical around the center of the same axis and are used for receiving illumination and generating induction current; an LD laser diode which is positioned on the axes of the four fan-shaped photoelectric detectors and is used for emittinglaser to the light receiving surfaces of the fan-shaped photoelectric detectors; a temperature sensor which is used for measuring the temperature of the fan-shaped photoelectric detector; two anti-dazzling screens which are coaxially arranged with the four fan-shaped photoelectric detectors and are used for shielding the light receiving surfaces of the fan-shaped photoelectric detectors; a currentcalculation module which is used for calculating the difference value of the two output induction current values; a temperature compensation module which is used for carrying out temperature compensation on the output value of the fan-shaped photoelectric detector; and an angle position calculation module which is used for calculating the angle position of a to-be-measured rotating shaft according to the compensated induction current difference value. Defects in the prior art can be overcome, and repeated manual calibration is not needed.

Description

technical field [0001] The invention relates to the technical field of angle measurement, in particular to an angle position sensor based on a photodetector and a measurement method thereof. Background technique [0002] Sensors provide the system with necessary raw information for processing and decision-making, which largely affects and determines the performance of the system. For the closed-loop control system, the accuracy of information feedback is very important, so whether it is appropriate to use the sensor to realize information collection and conversion is a key issue. At present, many applications require the use of angle sensors for high-precision rotation angle measurement, among which the shading type angle sensor is a commonly used one. In order to ensure the measurement accuracy, the existing light-shielding angle sensor requires frequent manual calibration, which is inconvenient to use. Contents of the invention [0003] The technical problem to be solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/34G01B11/26G01K13/00
CPCG01D5/34G01B11/26G01K13/00
Inventor 冯伟李言张海霞
Owner 北京市汉华环球科技发展有限责任公司
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