摘要：隨著科技的快速發展，溫度的需要也越來越廣泛，如生活、農業、工業、科研領域等都會有溫度的參與。溫度記錄儀是測溫儀器類型的其中之一。我們可以根據測量物質的不同及測量范圍的不同選用不同的溫度記錄儀。

　　　本次設計整點溫度記錄儀是由上位機和下位機兩部分組成，下位機是由AT89S52單片機完成數據采集、處理、存儲和LCD顯示，并通過串口與上位機進行通信。上位機（電腦）實時監控單片機采集的數據狀況和整點時間所對應的溫度、通過液晶顯示器顯示溫度和當前時間，同時將數據存到電腦中的“s.TXT和s1.TXT”文件中，8位獨立按鍵對時間進行修改及查詢整點存儲的溫度，因而在掉電的情況下，系統同樣能夠記錄每一時刻的數據，從而輕松地實現了溫度的實時監控和報警。

　　　該溫度記錄儀采用DS18B20作為本次系統的溫度傳感器，其測量范圍-55℃～125℃，因此只要不超過該范圍都可以使用，如檢測所在室內的溫度。該系統的抗干擾性好、設計靈活、方便，而且適合于在惡劣的條件下對溫度進行采集。

關鍵字：溫度記錄儀  AT89S52  DS18B20  整點存儲

ABSTRACT：With the rapid development of science and technology, the temperature are increasing used as agriculture, industry, scientific research so there will be temperature participation. Temperature logger thermometer type is one of them. Depending on the temperature and the temperature range of different substances in the different temperature loggers are written with different temperature requirements.    The whole point of this design is determined by temperature logger PC and the next crew of two parts, the next crew AT89S52 MCU completion of data collection, processing, storage and LCD display, and through the serial port to communicate with the host computer. PC (computer) chip real-time monitoring data collected by state and the whole point of time corresponding to the temperature, through the LCD display shows the temperature and current time, while the data stored in the computer's ‘s.TXT and s1.TXT’ file, eight separate buttons for time to modify and query the whole point of the storage temperature, which in the case of power failure, the system can record the same data each time, making it easy to achieve a real-time temperature monitoring and alarm.    The temperature logger using DS18B20 as the temperature sensor of this system, measuring range -55 ℃ to 125 ℃, so just do not exceed this range can be used, such as detecting where the indoor temperature. The system's interference, good design flexible, convenient, and suitable for use in harsh conditions for temperature acquisition.Keywords: temperature logger；AT89S52；DS18B20；the whole point storage