文档介绍：南京工程学院
毕业设计文献资料翻译
（原文及译文）
原文名称： A Measuring Instrument For Multipoint Soil Temperature Underground
课题名称：多点测量地下温度的仪器设计
学生姓名：赵锴学号：
指导老师：李茂富
所在院系：康尼学院
专业名称：通信工程

2011 年 3 月南京
A Measuring Instrument For Multipoint Soil
Temperature Underground
Cheng Wang, Chunjiang Zhao* , Xiaojun Qiao, Zhilong Xu
National Engineering Research Center for Information Technology in Agriculture, Beijing, P. R. China,
Abstract：A new measuring instrument for 10 points soil temperatures in 0–50 centimeters depth underground was designed. System was based on Silicon Laboratories’ MCU C8051F310, single chip digital temperature sensor DS18B20, and other peripheral circuits. It was simultaneously able to measure, memory and display, and also convey data to computer via a standard RS232 interface.
Keywords: Multi-point Soil Temperature; Portable; DS18B20; C8051F310
1、Introduction
The temperature of soil is a vital environmental factor, which directly influences the activity of microorganisms and the decomposition of organic substances. It can affect roots absorbing water and mineral elements. It also plays an important role in the growth rate and range of roots. Statistically, roots of most plants are within 50 centimeters underground, so it becomes very significant to measure the soil
temperature of different depth in this level.
The Soil Temperature Measuring Instruments used nowadays mainly fall into three types, the first type is the measure temperature by making use of the relationship between the soil temperature and the temperature-sensitive resistor. Before using this sort of instruments, the system parameters need to be adjusted; it is inconvenient to repair when the system runs into trouble. The second type is non-contact Soil Temperature Measuring Instrument which use infrared ray to measure temperature, this so