Displacement sensor based on photosensitive array

Abstract

The invention discloses a laser displacement sensor based on a photosensitive array. The laser displacement sensor comprises (1) a photosensitive array circuit which realizes measurement of laser light spots and conversion of the center of the laser light spots and displacement change; (2) a charging voltage-stabilizing circuit which realizes power supply of a lithium battery and is capable of cycle charging; (3) and a communication circuit which realizes communication with an aggregation node. 0805 or other packaging photosensitive elements are adopted so that distance between detection points is effectively reduced, resolution is enhanced and detection displacement is enabled to be more precise. A time sharing multiplexing ADC design is adopted so that cost of the sensor is effectively reduced and extendibility of the sensor is enhanced. Environment light intensity is measured firstly and then the laser light spots are measured by the sensor so that anti-interference capability and sensitivity of the sensor are enhanced. The sampled data and results are transmitted via a 433MHz waveband wireless local area data network so that networking and cluster work of the sensor can be facilitated. The high-capacity polymer lithium battery with a protective plate is adopted so that endurance capacity and safety and reliability of the sensor can be enhanced.

Description

technical field [0001] The invention relates to the technical field of displacement sensors, in particular to a displacement sensor based on array patch photosensitive. Background technique [0002] A sensor is a device that uses a certain conversion principle to convert physical, chemical, biological and other external signals into electrical signals that can be directly measured. In the process of realizing production automation, it is very important to use appropriate sensors. In recent years, in sensor measurement technology, ultrasonic, microwave, laser light sound, light, and electrical technologies have been more and more widely used to solve special measurement problems encountered in different industrial fields and to improve performance requirements. [0003] Common laser spot center measurement methods are mostly based on CCD to collect laser spot images, and use digital image processing to identify them. Limited by the size of the CCD, the laser spot diverges, ...

AI Technical Summary

Problems solved by technology

Limited by the size of the CCD, the laser spot diverges, so it is impossible to measure distant targets. When the laser spot diverges seriously, its recognition accuracy decreases rapidly

Due to the use of expensive CCD and complex image processing software, the overall cost is high, and the measurement data is not easy to export

Images