Displacement sensor based on photosensitive array

A sensor and laser displacement technology, applied in the field of displacement sensors, can solve the problems of inconvenient export of measurement data, reduced recognition accuracy, and high overall cost, and achieve the effect of facilitating sensor networking, improving equipment range, and improving resolution

Inactive Publication Date: 2015-10-14
李跃伟 +1
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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

Method used

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  • Displacement sensor based on photosensitive array
  • Displacement sensor based on photosensitive array
  • Displacement sensor based on photosensitive array

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] The laser displacement sensor based on the P880 chip photosensitive array of the present invention has the following functions: a) identifying the laser spot and converting the spot center and displacement; b) communicating with the summary node; c) 3.7V lithium battery power supply and can be recharged . In order to achieve the above functions, the circuit board has the following functional areas: a) photosensitive array circuit; 2) charging and voltage stabilization circuit; c) communication circuit.

[0027] 1) Photosensitive array circuit

[0028] SMD phototransistor P880 that uses infrared laser sensing, the photosensitive range is 400~1100nm, the package is 0603, the photoresistors are arranged side by side, the distance is 1mm, a total of 60, the range is 60mm, used to sense the laser spot moving horizontally, such as figure 1 ...

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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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
Inventor 李跃伟曹亚萍
Owner 李跃伟
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