討論了基于單總線數(shù)字溫度傳感器DS18B20 的多點溫度測量技術(shù)。重點論述了系統(tǒng)硬件組成、傳感器星型接線拓?fù)浣Y(jié)構(gòu)、DS18B20 自動尋址和排序?qū)崿F(xiàn)方法。簡單介紹了DS18B20 的基本測溫原理和工程應(yīng)用時的注意事項。給出了試驗數(shù)據(jù),證明了系統(tǒng)的科學(xué)性和有效性。
關(guān)鍵詞: 溫度測量; 單總線; 數(shù)字溫度傳感器; 單片機; 星型拓?fù)浣Y(jié)構(gòu)
Abstract : The technology of multi2temperature measure based on single bus digital thermometer DS18B20 is dis2 cussed. The system hardware makeup ,sensor’s stelliform connection topology configuration ,realization method of DS18B20 automatic addressing and taxis are emphatically dissertated. The basic temperature measure principle and applying notice proceedings of DS18B20 are introduced simply. Test data is given , and proves the system’s science quality and validity.
Key words : temperature measure ; single bus ; digital thermometer ; single chip processor ; stelliform connection topology configuration