孟上九 李想 孙义强 王淼

摘 要：季冻区路基在冻融作用下常常发生冻胀、融沉等病害，其中路基土的温、湿度水平是致灾的重要因素。针对现有监测手段单一，路基温、湿度全时空监测困难等问题，利用远程无线传输技术，设计了一种基于GPRS（通用分组无线服务）通信技术的季冻土路基温、湿度双参数监测系统，可以实时监测路基温、湿度变化。系统采用土壤专用的温、湿度传感器作为采集终端；以STC89C52单片机作为主控制器，通过编辑AT指令控制GPRS连通网络和数据收发，实现温、湿度数据远程传输和存储。经实际验证该系统采集精度高、稳定可靠、操作方便，可实现对季冻土路基内部温、湿度的实时无损监测。

关键词：季节冻土；温湿度监测；GPRS通信

DOI：10.15938/j.jhust.2018.03.012

中图分类号： TN929.4

文献标志码： A

文章编号： 1007-2683（2018）03-0066-06

Design of the Frozen Soil Roadbed Temperature

and Humidity Wireless Monitoring System

MENG Shang-jiu1， LI Xiang1，2， SUN Yi-qiang1， WANG Miao1

（1.Disaster Prevention Research Center for Civil Engineering， Harbin University of Science and Technology， Harbin 150080， China；

2.School of Measure-control Technology and Communication Engineering， Harbin University of Science and Technology， Harbin 150080， China）

Abstract：The seasonal roadbed of the frozen soil often frost， heave， thaw and settle under the circumstance of frozen and thawed. Among all the factors that cause such damage， temperature and humidity levels are the most significant. According to the problems like too simple measure and monitoring methods， hard to have all space-time monitoring and measure of roadbed and so on in the past， we use remote wireless transmission technique to design two-parameter of monitoring and measure system of temperature and humility in the roadbed of seasonal frozen soil based on the GPRS（General Packet Radio Service） communication technique which can real-timely monitor and measure the change of temperature and humility of the roadbed. The system uses special-purpose soil sensors of temperature and humility as collection terminals； uses STC89C52 single chip as the main controller to achieve remote transmission and storage of data of temperature and humility by editing AT commands to control GPRS network connection and data sending and receiving. We have tested this system and prove that it is a system of high-precision of collection， stabilization， reliability， simple operation which can be used for real-time and undamaged monitoring and measure of temperature and humility of inner-roadbed of seasonal frozen soil.

Keywords：seasonal of frozen soil； temperature and humidity monitoring； GPRS communication

0 引 言

季節性冻土在世界范围内广泛分布，而季冻区公路路基在冻融循环作用下易发生冻胀、融沉等灾害，使路基失稳乃至破坏，土体湿度（即含水量）和温度的变化是导致诸多道路灾害的直接因素。因此，连续获取季冻区路基土温度和湿度数据及其变化规律对防治路基冻融破坏具有重要意义[1]。

在季冻区路基温湿度研究与监测方面，Konard[2]等通过对室内试验的研究描述了路基土在正冻状态下的结构形成和水分迁移的计算模型。何东坡[3]等利用DS18B20温度传感器获得了路基内部在不同时期、深度的温度分布状况。毛雪松[4]等利用自主研发的温度-湿度-荷载综合模型在室内进行模拟路基冻融循环实验。……