汽車防盜功能下的低溫保護(hù)設(shè)備的開發(fā)中英文翻譯資料(已修改)
2025-01-18 13:13 本頁面
【正文】 Development on Low Temperature Protecting Device with Theft proof Function for Cars Abstract: In this paper, a kind of intelligent low temperature protecting device with theft proof function for cars is presented from the aspects of both hardware structure and software design. By keeping the environment temperature suitable for the engine to run, it solves a good many problems for cars when cars are kept under low temperature circumstances. The temperature collecting circuit with DS1820 digital sensor, running lamp control circuit with a 555 integrated timer, flow chart of main control program and so on, are all introduced particularly.Keywords: DS1820 sensor。 555 oscillating circuit。 Low temperature protecting device。 Watchdog.1 Introduction If cars are remained off for a long while under cold circumstances, the lubricant viscosity of engine’s drive system and electrolyte viscosity of battery will bee larger, volatility of gas will be weaker and oil film will fall off, so that a lot of problems may be brought on because of low temperature, such as the car is difficult to start and hard to run quickly at the beginning, its assembly especially the engine wears out severely, the battery’s voltage is lower. The intelligent low temperature protecting device with theft proof function for cars is developed to solve the problems brought forward above. Not only can it resolve the problems by keeping the environment temperature suitable for the engine to run, but also it can guard against theft independently and can be patible with additional theft proof device installed by users themselves. The devices have been used on cars of some cities in China, and they are proved to be convenient, economical and useful.2 Hardware Structure The hardware structure diagram of low temperature protecting device for cars is shown in , which is mainly posed of CPU, external interface circuit, voltage stabilization module, display module, auxiliary control circuit, 555 oscillating circuit, watch dog circuit, key input module, etc. The system adopts 89S51 SCM produced by ATMEL Corporation as its CPU. The external interface circuit includes some relays, sensors, switches and a buzzer. The DS1820 digital temperature sensor made by Dallas Corporation, threeterminal vibration sensor with adjustable precision, negative burst switch on the door and a buzzer constitute external theftproof circuit。 the level of “On” wire, startup wire, running lamp wire and the theftproof stalled by users are controlled through JD1914 relays。 and the gas induction switch is applied to detect whether the engine is running or not. The +12V wire of car’s battery connects to voltage stabilization module through a relay on board, with the help of which, the negative burst switch on the door can cut off power supply to the system while the car’s door is opened, ensuring that the engine is not running while someone is going into the car. In order to obtain a stable +5V voltage and avoid interference from external ponents, the LC filter circuit are used to filter voltage waves, and double 7805 power supply method is adopted. The display module includes three 8segment LED displays and a threecolor LED lamp, displaying temperature data and work state of the system, and users can set the value of TL (the lowest temperature to start the engine) and TH (the highest temperature to stop the engine) between 55 to 125 centigrade degrees with the help of it and the key input module. With the ability of level conversion and avoiding rever
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