介紹了以DS18B20基礎設計室內溫度檢測與調控系統的基本過程，該系統以AT89C52單片機為主控器，采用單線多點檢測技術，在一條總線上掛接5個DS18B20溫度檢測點，并循環檢測讀取各檢測點溫度數值，可根據實際情況設定閾值，當其中任意3個檢測點的溫度均超過閾值時，實施超溫告警及自動溫度調節功能，實驗測試結果達到了預期的設計目標。該系統改進了一般溫度檢測裝置單點測試及只測溫而不能調節溫度的缺陷，可應用于對環境溫度要求嚴格的病房、居室、辦公室、小型倉庫等場所。

　　Abstract:

　　This paper introduced the design process of indoor temperature detection and automatic control system based on DS18B20. The system controller was AT89C52， and used one-way multi-point detection.Five temperature detection points of DS18B20 was attached to the bus， it was be loop detected and read of temperature of every test point， and could be set thresholds based on the actual situation， when temperature of any three test points exceeded threshold， and started the function of over-temperature alarm and automatic temperature control， the test results have achieved the desired design goals， The system improves the defects of general temperature detector that test by a single point and only test temperature but not regulate the temperature，it can be used for ward，room，office，small storage and so on that to be strict in environmental temperature.

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