Design and Performance Research of Two Dimensional Artificial-hair Sensor
Date Issued
2005
Date
2005
Author(s)
Huang, Chien-Tai
DOI
zh-TW
Abstract
Many organisms in the natural environment experience the vision function decaying in the course of evolution. However, they own a hair form organ which can sense the change of surroundings so that they could survive in the environment. The purpose of this thesis is to design a new two dimensional artificial-hair sensor, by measuring the acting force and identifying the direction of the sensor. The source of the acting force can be air flow or sound wave. The sensor utilizes the photo detecting method, using an LED as the light emitting component and a quadrant photodiode as the sensing element. Using the air dynamic as the main working principle, the applied disturbance will cause the displacement of the light point in the quadrant photodiode; the amount of displacement could be obtained by further recording and processing via data acquisition instrument and Labview software. In order to achieve two dimensional sensing, the new sensor needs only a single quadrant photodiode and a light emitting diode, thus provides benefits such as simple structure and low cost of production. Due to high sensitivity of the quadrant photodiode, the displacement, which is the output signal, also has a good resolution. The sensor could be used in the place where the air flow or pressure changes presents, or where the vibration occurs. Among numerous potential application fields are alarm system, noise sensing, earthquake detection, as well as feedback force of the robotic finger mechanisms.
Subjects
四象限光電二極體
纖毛
發光二極體
光點位移
quadrant photodiode
artificial-hair
LED
light point displacement
Type
thesis
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