外文翻译——基于单片机的红外防盗报警系统设计
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1、外文原文 Based on infrared alarm technology security systems 1 the introduction 1.1 the research significance of this topic research situation at home and abroad . With the development of society and science and technology unceasing development, peoples living standards been improved greatly, and to the
2、 private property protection means in the unceasing enhancement, the intelligent facilities for anti-theft puts forward new requirements. This design is to meet the need of modern residential anti-theft designed family electronic alarm system. It in previous devices based on improved greatly, becaus
3、e use the single-chip processor signal, not only can used for single residential area, also can be used in a large-scale residential security systems. Its the job of the performance is good, do not appear to report and misstatement phenomenon, safe and reliable. In our country, the present market co
4、ndition alarm basically has triggered alarm system pressure switch electron and alarm system and pressure shading triggered alarm system, etc. Various kinds of alarm, but this several common alarm there are some shortcomings. This system USES a human pyroelectric infrared sensor in the human body de
5、tector in the flied, passive pyroelectric infrared detectors because of its low cost, easy fabrication, low cost, installation is more convenient, anti-theft performance is stable and high sensitivity, safe and reliable, has attracted broad family characteristics such as popular with the customers.
6、And alarms installation concealment, not easily by rogue found. 1.2 infrared alarm technology introduction 1.2.1 nature objects of the infrared radiation The nature of any object, as long as the temperature above absolute zero (273 ), constantly outward issued infrared radiation, and travel at the s
7、peed of light energy. Object radiate outward infrared radiation of energy and the object of temperature and infrared radiant wavelength. Assuming objects launching infrared radiation of peak wavelength for a few, its temperature for T, the radiation energy equals infrared radiation of peak wavelengt
8、h gerben and object product temperature T. This product is a constant, namely: The higher the temperature of the objects, emit infrared radiation of the smaller peak wavelength, send out infrared radiation energy is bigger also. 1.2.2.pyroelectric effect Passive infrared detector also called pyroele
9、ctric infrared detector, its main working principle is pyroelectric effect. Pyroelectric effect means if make some strong dielectric material (such as qin batio3, qin wrong acid lead P (zT), etc.) of the surface temperature changes, then with the temperature rise or fall, material surface occurs pol
10、arization, namely on the surface of the charge will be produced change, and material surface charge lost balance and eventually charge will change withvoltage or current form output. 1.2.3 pyroelectric infrared sensor basic structure Pyroelectric infrared sensors from sensor detection yuan, interfer
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