介紹了以DS18B20基礎(chǔ)設(shè)計室內(nèi)溫度檢測與調(diào)控系統(tǒng)的基本過程，該系統(tǒng)以AT89C52單片機(jī)為主控器，采用單線多點(diǎn)檢測技術(shù)，在一條總線上掛接5個DS18B20溫度檢測點(diǎn)，并循環(huán)檢測讀取各檢測點(diǎn)溫度數(shù)值，可根據(jù)實(shí)際情況設(shè)定閾值，當(dāng)其中任意3個檢測點(diǎn)的溫度均超過閾值時，實(shí)施超溫告警及自動溫度調(diào)節(jié)功能，實(shí)驗(yàn)測試結(jié)果達(dá)到了預(yù)期的設(shè)計目標(biāo)。該系統(tǒng)改進(jìn)了一般溫度檢測裝置單點(diǎn)測試及只測溫而不能調(diào)節(jié)溫度的缺陷，可應(yīng)用于對環(huán)境溫度要求嚴(yán)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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