摘要
在重型车远程车载终端数据一致性试验中,利用计算互相关函数极大值的方法,对重型车在线监控平台接收的数据序列与OBD采集的数据序列进行延时修正。平台接收到的车速、发动机转速、进气流量、燃油流量和NO_(x)等数据项,与对应的OBD数据项间的延时,大小并不完全相同,延时修正后的数据序列间相关系数R 2均大于0.9。将原始平台接收的数据加入信噪比SNR为-10 dB的噪声信号,同加入噪声前相比,加入噪声后各平台接收的数据项与对应OBD数据项之间的延时完全相同。
During the data consistency test of heavy-duty vehicle remote terminal,the maximum value calculation of cross-correlation function was used to correct data delay between the heavy-duty vehicle online monitoring platform and OBD instrument.The delay degrees of data items such as vehicle speed,engine speed,intake air flow,fuel flow and NO_(x)between them were not exactly the same.And all R 2 correlation coefficients of corresponding data sequences after the correction were larger than 0.9.The noise signal with the SNR of-10 dB were introduced into the platform data and the results were compared with the original data.After the introduction of noise,all the data delays of items between the platform and OBD became the same.
作者
熊兴旺
杨妍妍
甄凯
刘保献
XIONG Xingwang;YANG Yanyan;ZHEN Kai;LIU Baoxian(China Automotive Technology&Research Center Co.,Ltd.,Beijing 100176,China;Beijing Municipal Ecological and Environmental Monitoring Center,Beijing 100048,China;Beijing Key Laboratory of Atmospheric Particulate Monitoring Technology,Beijing 100048,China;China Automotive Technology&Research Center Co.,Ltd.,Tianjin 300300,China;School of Environment,Tsinghua University,Beijing 100084,China)
出处
《车用发动机》
北大核心
2021年第2期82-87,共6页
Vehicle Engine
基金
基于物联网及大数据分析的重型柴油车排放跟踪技术研究及应用示范(Z181100005418003)
基于远程在线的重型柴油车和非道路移动机械排放监管技术研究(Z191100009119014)。
