Switzerland . four cylinder pressure data can be sampled and conveniently analyzed to identify the combustion conditions in all cylinders . in order to reduce system errors of sampling channels and insure coherence , sampling channels are calibrated 數(shù)據(jù)采集系統(tǒng)選用4個瑞士kistler公司生產(chǎn)的6117a46型火花塞式缸壓傳感器,可以同時采集4個缸的氣缸壓力數(shù)據(jù),非常方便分析發(fā)動機各缸的燃燒狀況。
Because limited by the sampling channel of transient electromagnetic measuring depth fieldwork curve ( generally 20 ~ 40 channels ) , the smoothing degree of fieldwork curve is not very good , it make against the differential imaging treatment . in order to hold the continuous change characters of the curve and seek the voltage exactly , we use the thrice spline insert number function to reconstruct the fieldwork data ; 4 ) t ; 3 .由于受瞬變電磁測深實測曲線取樣道的限制(一般為20 ~ 40道) ,實測曲線光滑程度較差,不利于微分成像處理,為了更好的把握曲線連續(xù)變化的特征及準確求導(dǎo),采用了三次樣條插值對實測數(shù)據(jù)進行重構(gòu);續(xù)