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介绍了集成单线数字温度计DS1820的原理和功能特性，并针对它在红外热像诊断系统中的应用提出了DS1820与微机构成单线总线系统的原理和控制程序方案。
Introduced the principle and function characteristic of the integrated single line digital thermometer DS1820, and proposed the principle and control program scheme of single line bus system composed by DS1820 and microcomputer in view of its application in infrared thermal imaging diagnosis system.