【正文】 8563 through the I2C Bus, with the data which just received store to the memory AT24C128, then process each room temperature value. When the value achieve the data which is established from keyboard in advance, the console output warring to the alarm circuit on reports the alarm. Meanwhile the room number, the time and the temperature value delivers the LED display circuit to display. Every room alarm temperature value is established through the keyboard input module, the console process value and stores in the memory corresponding the input. The CAN Bus interface design The CAN Bus corresponds high as 1 Mb/ s, the most longdistance range may reach 10 km。 After that 48 bits are this DS18B20 own sequence numbers, and these 48 sequences number is only one in the whole world, finally 8 bits are the front 56 cyclical redundancy check code. So use the 64 bits serial number we can divide each DS18B20,and we can meets many temperature sensors of DS18B20 on one1Wire Bus. According to DALLAS Semiconductor Corporation39。 在綜合全國各地公考模擬試卷優(yōu)點的基礎上 ,特意編制一套緊貼 2021 年湖南公考命題精髓的“考前 預測卷 ”,有利于考生提前適應公考試卷的難度、區(qū)分度并有利于提高考生考前心理適應共 4 頁 第 10 頁 度。 考試百科還提供考試咨詢、培訓服務，依托于揚格考試研究院 —— 以考試研究為核心、以提供考試服務為目的的專業(yè)考試研究機構，考試百科積累了優(yōu)厚的師資和豐富的教學經驗。 The twisted pair wire (coaxial cable) transmits the medium separately to meet to the chip of PCA82C250 pins CANH, CANL. Considered the scene has various disturbance, the high speed light isolation ponents (6N137) are added between the CAN controller SJA1000 and the PCA82C250[4]. The pitch point hardware design 共 4 頁 第 7 頁 The pitch point mainly includes the CAN Bus interface, the control module of the air gate of airconditioning system and temperature sensor DS18B20, the system structure like figure 3 shows. The DS18B20 is DALLAS Semiconductor Corporation39。 共 4 頁 第 5 頁 Distributed Building Temperature Control System Based on CAN Bus Abstract This paper proposed a kind of distributed buildingtemperature control system based on CAN Bus, and has produced the system of hardware structure design, the software design, can examine the building temperature and control the exceptional on the realtime, be indicated through experiment that system is reliable and save energy. KeyWords: temperature control； CAN Bus； energy saving 1 Introduction Gradually climbs along with the temperature, electric power industry weled has used electricity once a year most seasons: The electric power weles a peak summer. Since 2021, the power supplied has bee more and more serious in china. And more and more people appeal for building energy conservation. Air conditioning?s energy conservation is one of the most important ponents of building energy conservation[1]. Many public buildings air conditioning is one of highest energy consumption sources in China. Take Beijing as the example, in 2021, although the Beijing largescale public building only accounts for the whole city civil construction total area %, but whole year the total power consumption actually achieved billion kilowatts[2], approach all inhabitants to live use electricity one half, according to the preliminary understanding, Beijing39。 圖 4 控制臺程 序結構圖 共 4 頁 第 4 頁 指 導 教 師 評 語 外文翻譯成績： 指導教師簽字： 年 月 日 注： 1。 一旦與傳感器 DS18B20 連接的總線不好或者損壞，單片機將無法讀取低信號，并進入無限循環(huán)等待。根據由主機控制在每個房間空調氣門系統接收的一定的溫度值。該系統采用AT89S52，這是一節(jié)低功耗 芯 片 ， 該 芯片 是 由ATMEL公司生產的，有 4 KB 的 系 統 內 可 編 程（ ISP）的 FLASH 存儲器。 不同的樓宇，其內部空間分布和結構是不同的．為實現系統的構建，筆者提出一種基于SJAl000 的 CAN通信平臺來實現各節(jié)點的可靠通信；在此基礎上，由主控制器實現對各檢測節(jié)點的溫度設定，實時檢測整幢樓宇溫度，并由 LCD 顯示結果，對異常情況進行語音報警和控制 ，以實現節(jié)能目的．系統的設計目的是為了測量和控制分布在一棟建筑物內各個房間的溫度，而測溫和控制節(jié)點是分散的，所以要通過 CAN 總線實現控制臺和分布在建筑物的各個部分的控制節(jié)點相連，每個控制