Research Anti-interference function Infrared proximity sensing module

• Main Author: 林有章
• Other Authors: 黃宜正
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/42518939646484654167

碩士 === 國立彰化師範大學 === 機電工程學系 === 101 === Abstract In this thesis, a solution of an anti-light infrared proximity sensing module is proposed. The IR receiver of the infrared proximity module encounters the interference of sunlight and reaches saturation thereof. This causes the fact that less transmitting pulse signals of the transmitting infrared proximity module to the receiving end when any object is blocked. Problems are created by less sensing distance without any received signals when the receiver is saturated. This thesis uses the property of infrared proximity sensing and associated colored cover by increasing the gain of the operational amplifier, programmed microprocessor control unit and firmware modifications. Experimental results show the measuring distance is increased with good sensitivity and achieves the low power consumption. A solution for the anti-light issue, especially for the sunlight outdoors is solved successfully by designed infrared proximity sensing module. Research result provides practical applications for outdoor electronic water faucets under the inference of sunlight. The reliability of developed infrared proximity sensing module is examined functionally with effective low cost and through low power consumption. Keywords: Infrared sensor, Disturbance rejection sensing circuitry, Electronic Water Faucet.