基于DS18B20模块固化的CRC校验漏检率补偿算法研究  

Research on Compensation Algorithm of CRC Checking Loss Detecting Rate of DS18B20

作　　者：刘天时[1] 张旭华[1] 张留美[1] 王国庆[2] 

机构地区：[1]西安石油大学计算机学院,西安710065 [2]中国航空无线电电子研究所,上海200233

出　　处：《科学技术与工程》2014年第3期59-63,共5页Science Technology and Engineering

基　　金：国家973预研项目(613169);陕西省自然科学基金(2010JM8032)资助

摘　　要：为了提高DS18B20温度数据的可靠性,通过降低DS18B20模块自身CRC校验的漏检率,提出了一种温度采集补偿算法。该算法对DS18B20模块采集到的温度数据进行分析,排除数据队列中相对错误率较高的数据,再经滤波和迟滞处理后作为实际温度数据。结果表明,在给定的精度下,选定相应的数据队列长度及排除数据数,该算法不仅能够降低DS18B20的CRC漏检率,同时能平滑温度显示数据,有效抑制温度显示的闪烁现象。To improve reliability of DS18B20 temperature data, a compensation algorithm is proposed by reduc- ing the loss detecting rate of CRC checking of DS18B20. The algorithm removes the data which has higher error rate by analyzing the collected temperature data of DS18B20. Then it gets the temperature data by filtering and delay process. The results show that this algorithm not only reduces loss detecting rate of CRC checking of DS18B20, but also smoothes the displayed temperature data and restrains the flicker effect of temperature effectively in the condi- tion of given precision, determining the corresponding queue length, and the count of the data which is removed.

关 键 词：温度采集 漏检率 循环冗余校验DSl8820 

分 类 号：TP306.6[自动化与计算机技术—计算机系统结构]