基于單片機的汽車防盜報警系統(tǒng)設計中英文參考資料(編輯修改稿)
2025-06-27 12:00 本頁面
【文章內(nèi)容簡介】 l coded signal which uses in to transmit. The code channel code uses in to express the remote control status。 each set of systems use a fixed channel code. The code foreword number uses in to record the encoded order, its starting value is 0, the monolithic integrated circuit every time codes a time, the code foreword number upwardly counts time. The code channel code and the code foreword number deposits in monolithic integrated circuit EEPROM, guarantees them power cut the influence. The jump code is the systematic true password, it passes through the plex special algorithm by the code channel code and the code foreword number to extract, this special algorithm foreign security. The pressed key operation code by the pressed key which presses was decided, when the hypothesis the key is pressed down, its code decides as 0 1H。 When relieves the key presses down, its code decides as 00H. Whether is the decoding confirms receive the code legitimate a series of operating process. Was confirmed the legitimate code needs to satisfy three conditions。 (1) codes the channel code and the decoding channel code is same。 (2) coded the foreword number to be bigger than the decoding foreword number (decoding foreword number to record on legitimately has used code foreword number, this condition might guarantee before has used code was invalid)。 (3) jumps the code to be equal to reuses the special algorithm to extract changes the code. After the monolithic integrated circuit confirmed receives is the legitimate code, writes the code foreword number in the decoding foreword number, and pletes corresponding operation processing according to the operation code. The decoding channel code and the decoding foreword number also deposits in monolithic integrated circuit EEPROM, guards against because of power cut loses. Security reports to the police realizationIf will have robber Chen ZheRu the room, starts the automobile, after wrong password, then the automobile storage battery +12V voltage, the ignition electric current way ignition lock, the ignition outage, the engine extinguishes, again starts, will duplicate the above process, like this, the bandits and thieves always will not be able to start the automobile, will not be able to achieve its anticipated goal. The alarm circuit mainly is posed by the integrated block and the speaker and electronic switching SCR. Triode or the multipleunit tube, are for enhance the electric circuit measure which the power but often uses, it has posed a current amplification factor very big equivalent transistor, total enlargement factor for these two enlargement factor product. SCR is the electronic switching which constitutes by the siliconcontrolled rectifier, the electric capacity and the resistance constitution negative booster concurrently filter, provides +3 +4V to IC the voltage, IC is traces Draws up sound reports to the police the
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