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A photodetector-based angular position sensor and its measuring method

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: 2022-04-19
北京市汉华环球科技发展有限责任公司
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AI Technical Summary

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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  • A photodetector-based angular position sensor and its measuring method
  • A photodetector-based angular position sensor and its measuring method

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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, comprising four fan-shaped photoelectric detectors symmetrical around the same axis, which are used for receiving light to generate an induced current; an LD laser diode, which is located on the axis of the four fan-shaped photoelectric detectors It is used to emit laser light to the light-receiving surface of the fan-shaped photodetector; the temperature sensor is used to measure the temperature of the fan-shaped photodetector; The light-receiving surface is blocked; the current calculation module is used to calculate the difference between the two output induced current values; the temperature compensation module is used to perform temperature compensation on the output value of the fan-shaped photodetector; the angle position calculation module is used to compensate according to the The angular position of the rotating shaft to be measured is calculated from the difference of the induced current. The present invention can improve the deficiencies of the prior art, and does not require repeated manual calibration.

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 Patents(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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