翻訳と辞書 Words near each other ・ Passive data structure ・ Passive daylighting ・ Passive drinking ・ Passive dynamics ・ Passive electioneering ・ Passive electrolocation in fish ・ Passive electronically scanned array ・ Passive fire protection ・ Passive fluency ・ Passive foreign investment company ・ Passive heave compensation ・ Passive house ・ Passive hydroponics ・ Passive immunity ・ Passive income ・ Passive infrared sensor ・ Passive integrator circuit ・ Passive intellect ・ Passive investor ・ Passive leg raising test ・ Passive management ・ Passive margin ・ Passive matrix addressing ・ Passive Me, Aggressive You ・ Passive Me, Aggressive You (Remixes & B-Sides) ・ Passive monitoring ・ Passive nuclear safety ・ Passive obedience ・ Passive optical network ・ Passive physiological intervertebral movements Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Passive infrared sensor ： ウィキペディア英語版 Passive infrared sensor A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. == Operating principles == All objects with a temperature above absolute zero emit heat energy in the form of radiation. Usually this radiation is invisible to the human eye because it radiates at infrared wavelengths, but it can be detected by electronic devices designed for such a purpose. The term ''passive'' in this instance refers to the fact that PIR devices do not generate or radiate any energy for detection purposes. They work entirely by detecting the energy given off by other objects. PIR sensors don't detect or measure "heat"; instead they detect the infrared radiation emitted or reflected from an object. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Passive infrared sensor」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.