外文資料翻譯---智能溫度傳感器ds18b20的原理及其應(yīng)用-其他專(zhuān)業(yè)-資料下載頁(yè)
【導(dǎo)讀】紹，8051單片機(jī)作為其作品CPU和DALLAS18B20其溫度數(shù)據(jù)收集-轉(zhuǎn)換。軟件程圖和一個(gè)短暫的時(shí)間延遲子程序也都給予列出。單軌數(shù)字溫度傳感器DS18B20的生產(chǎn)由美國(guó)DALLAS公司。號(hào)成字信號(hào)提供的微電腦處理直接。與傳統(tǒng)的相比熱敏電阻器，它可以直接讀出的措。施溫度并根據(jù)實(shí)際它可以actualize9?12的數(shù)值讀數(shù)方式通過(guò)簡(jiǎn)單的編程。取或?qū)懭隓S18B20的，只需要一個(gè)單一的線(xiàn)?？梢怨╇娫碊S18B20的，不需要額外的電源。因此，如果使用DS18B20的，系統(tǒng)的結(jié)。因?yàn)槊總€(gè)DS18B20包含一個(gè)獨(dú)特的硅序列號(hào)，多個(gè)DS18B20s. 可以存在于相同的1-Wire總線(xiàn)。這允許澆筑溫度傳感器在許多不同的地方。DS18B20的核心功能是其直接到數(shù)字式溫度傳感器。DS18B20的配置（9，10,11. 含的“符號(hào)”（）位，表示是否溫度是正面還是負(fù)面。如果DS18B20的配置較低的分。MCS51單片機(jī)控制DS18B20來(lái)完成。振蕩器的頻率是12MHz，根據(jù)DS18B20的初始化，操作和寫(xiě)入讀取操作。雖然DS18B20的有很多優(yōu)點(diǎn)，但使用它并不是一件簡(jiǎn)單的事。為了確保嚴(yán)格的I/O周期DS18B20. 在對(duì)DS18B20的操作中，有15微秒，90微秒，應(yīng)使用270
【正文】 arately meet the power source and the earth. V. The design of the software Follow the munication agreement of the DS18B20, the temperature conversion and the software process of the work can mean for the Fig. 2 VI. The time delay about DS18B20 Although the DS18B20 have lots of advantages,but using it is not a simple matter. Because of adopting the data transmission with a signal line, so itis strict to the operation cycle time request for read and write. In order to make sure the strict I/O cycle time of the DS18B20, need to do postpone accurately. In the operation of DS18B20, there are 15 μs, 90 μs,270 μs, 540 μs should be used. Because all these postpone is multiple of 15μs, so can write aDELAY15(n) function, the source code is as follows: Void delay15(n) Unsigned char n。 {do { _nop_()。//01 …… _nop_()。//12 n_ } While(n) carry on with this function to postpone about 15 μs Ns time. Have the assurance of the precision postpone,can take read or write operation to the DS18B20. VII. Conclusion Because of its system is simple, the temperaturemeasurement precision is high, the connection is convenient, the conversion rate is quick, has brought convenient for the hardware design, and can reduce the cost effectively, cut the development cycle. REFERENCES [1] Dallas Corp. OneWire Digital Thermometer [2] Sha zhanyou, Chang chunlai, Fang zhiguang. The principle and application of DS18B20, Electrical Measurement amp。 Instrumentation, Feb 1999 [3] Li qunsheng, Xu jianyun, Lu hao. Application of DS1820 D igital Temperature Sensors in IMUTemperature Measurement System. AERO WEAPONRY,2021 [4] Sun xiaobo. Application of DS1820 in multipoint temperature control system, Journal of Harbin University of Commerce Natural Sciences Edition, 2021
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