外文翻譯——基于單片機(jī)的紅外防盜報(bào)警系統(tǒng)設(shè)計(jì)-單片機(jī)-展示頁(yè)
2025-01-31 10:19本頁(yè)面
【正文】 , pyroelectric infrared sensors have unit, double yuanhe four yuan to wait for a few kinds, for human detection of infrared sensor adopts double yuan or four yuan type structure. According to pyroelectric infrared sensor utility cent, have the following kinds: used for measuring temperature sensor, it39。外文原文 Based on infrared alarm technology security systems 1 the introduction the research significance of this topic research situation at home and abroad . With the development of society and science and technology unceasing development, people39。s living standards been improved greatly, and to the private property protection means in the unceasing enhancement, the intelligent facilities for antitheft puts forward new requirements. This design is to meet the need of modern residential antitheft designed family electronic alarm system. It in previous devices based on improved greatly, because use the singlechip processor signal, not only can used for single residential area, also can be used in a largescale residential security systems. It39。s the job of the wavelength of (120) nano, Used for flame detection sensor, it39。s the job of the wavelength of 7 to 15 feet. Figure is a double detection yuan pyroelectric infrared sensor structure schematic drawing. The sensor will two opposite polarity, special pyroelectric infrared detector basic principle Pyroelectric infrared sensor by receiving mobile human radiation that certain wavelengths of infrared radiation, can be transformed into and human body movement speed and distance, the direction of lowfrequency signals about. When pyroelectric infrared sensor by ir radiation sources of radiation, its internal sensitive materials temperatures will rise, polarization intensity is abate, surface charge reduce, usually will release this part of the charge called pyroelectric charge. Because of pyroelectric charge how many can reflect material changes of temperature, so by pyroelectric charge by circuit transformed into the output voltage can also reflect material changes in temperature, thus detect ir radiation energy changes. 2 hardware system design infrared antitheft alarm system hardware design Because this design focuses on family guard against theft, realtime monitoring of a narrower range, so this design by simply using a passive infrared detector is enough. Therefore, infrared intelligent antitheft alarm system, and the specific design requirements for: (1)pletes to high sensitive infrared sensor design, make its can warning of what happened realtime and accurate detection. (2) automatic alarm (automatic dialup alarm audible and
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