外文翻譯——基于單片機的紅外防盜報警系統(tǒng)設(shè)計-單片機-文庫吧資料
2025-01-27 10:19本頁面
【正文】 et relay connected, automatic weighing dial the key a potential, let telephone automatic dialup, so they could finish the system alarm function. system working principle The whole system hardware part mainly includes six parts: MCU module。s the job of the wavelength for + / nano, For human detection sensor, it39。s the job of the performance is good, do not appear to report and misstatement phenomenon, safe and reliable. In our country, the present market condition 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 mon alarm there are some shortings. This system USES a human pyroelectric infrared sensor in the human body detector in the flied, passive pyroelectric infrared detectors because of its low cost, easy fabrication, low cost, installation is more convenient, antitheft performance is stable and high sensitivity, safe and reliable, has attracted broad family characteristics such as popular with the customers. And alarms installation concealment, not easily by rogue found. infrared alarm technology introduction 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 speed 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 wavelength 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. effect Passive infrared detector also called pyroelectric 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 polarization, 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. pyroelectric infrared sensor basic structure Pyroelectric infrared sensors from sensor detection yuan, interference filters and mosfet verifier three parts. According to the number of detecting yuan to points
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