一种基于二值化数据序列的延时修正方法  

A Method of Time Delay Correction Based on Binarized Data Sequence

作　　者：熊兴旺 李琪莉 李昂 李梁 XIONG Xingwang;LI Qili;LI Ang;LI Liang(CATARC New Energy Vehicle Test Center(Tianjin)Co.,Ltd.,Tianjin,300300,China;China Auto Technology(Beijing)Co.,Ltd.)

机构地区：[1]中汽研新能源汽车检验中心(天津)有限公司,天津300300 [2]中汽科技(北京)有限公司

出　　处：《小型内燃机与车辆技术》2022年第6期46-50,共5页Small Internal Combustion Engine and Vehicle Technique

摘　　要：重型车远程车载终端数据一致性试验中,将重型车在线监控平台接收的原始数据序列与OBD原始数据序列分别进行二值化(0-1),构造互相关函数进行延时修正,车速、发动机转速、进气流量、燃油流量和NO_(x)等各参数项的延时,与依据原始数据序列所得延时完全相同。利用部分原始数据片段进行二值化并延时修正。当截取原始数据片段长度至少为7 600 s时,所有数据项的延时都能达到稳定,且与通过完整原始数据序列计算的延时完全一致。During the data consistency test of heavy-duty vehicle terminal, the original data sequence received by the heavy vehicle online monitoring platform and the original OBD data sequence are binarized(0-1) respectively. Cross-correlation function is constructed for delay correction. For the data items such as vehicle speed, engine speed, intake air flow, fuel flow and NO_(x), the time delay calculated based on the binarized data sequences are exactly the same with the time delay calculated based on the original data sequences. The original data fragments are used for binarization and delay correction. When the length of the original data fragments used is equal to or larger than 7 600 s, the time delay of all data items can become stable. And the time delay is completely consistent with that acquired based on the whole original data sequence.

关 键 词：数据序列 延时 二值化 互相关函数 数据片段 

分 类 号：TP206.1[自动化与计算机技术—检测技术与自动化装置] U495[自动化与计算机技术—控制科学与工程]