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Signal detection circuit, position sensitive detector and position detection system

A signal detection and signal processing circuit technology, applied in the field of sensors, can solve the problem of low measurement accuracy of position sensitive detectors, and achieve the effect of improving accuracy

Active Publication Date: 2021-09-07
GUANGDONG BOZHILIN ROBOT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a signal detection circuit, a position sensitive detector and a position detection system for the problem of low measurement accuracy of traditional position sensitive detectors

Method used

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  • Signal detection circuit, position sensitive detector and position detection system
  • Signal detection circuit, position sensitive detector and position detection system
  • Signal detection circuit, position sensitive detector and position detection system

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Embodiment Construction

[0039] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. A preferred embodiment of the application is shown in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0040] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to and integrally integrated with the other element, or there may be an intervening element at the same time.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in th...

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Abstract

The application relates to a signal detection circuit, a position sensitive detector and a position detection system; the signal detection circuit includes a signal conversion circuit, the signal conversion circuit is used to receive the AC current signal of the position sensitive sensor, and convert the AC current signal into an AC Voltage signal; signal amplification and filtering circuit, the signal amplification and filtering circuit is used to receive the AC voltage signal, and amplifies and filters the AC voltage signal; the true effective value conversion circuit, the true effective value conversion circuit is used to receive the amplified and filtered AC voltage signal , converting the amplified and filtered AC voltage signal to a true effective value to obtain a DC current signal; and a signal processing circuit, the signal processing circuit is used to receive the DC current signal, and process the DC current signal to obtain the center of gravity of the spot, so as to realize the position sensitive The AC current signal output by the sensor is properly amplified and fully filtered to improve the accuracy of the center of gravity of the test spot.

Description

technical field [0001] The present application relates to the technical field of sensors, in particular to a signal detection circuit, a position sensitive detector and a position detection system. Background technique [0002] Position Sensitive Detectors (PSD) is a sensor that can continuously measure the position of the center of gravity of the light spot irradiated on its photosensitive surface. When the incident light spot falls on different positions of the photosensitive surface, the position-sensitive detector will output the corresponding current signal. By processing the output current signal, the position of the center of gravity of the incident light spot on the position-sensitive detector can be determined. However, Since the light wavelength range that the position-sensitive detector can sense is usually 320 nanometers to 1100 nanometers, in actual use, there will be interfering light in the environment (such as sunlight, fluorescent lamps, lighting lamps, etc....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 吴健刘玉平
Owner GUANGDONG BOZHILIN ROBOT CO LTD
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