Accuracy analysis of the measuring structure with an auxiliary correcting channel
Ihor Buchma, Taras Repetylo · Pomiary, Automatyka, Robotyka · 2010
For example, it can be used for building dual-frequency thickness-meter of sheet steel constructions, which reduce the inuence of lift-of between the steel constructions and CECS. e lower and higher frequence signals from the output of BF1 and BF2 lters are added by the ADD1 and amplied by the power amplier, and then excited to the primary coils of the CECS. Signals from the parametric parts of the CECS coming into the main measurement channel, and signals from the transformer parts coming into the auxiliary channel. As a result, higher frequency signal is in the main channel and may aect its work and vice versa, lower frequency signal is in the auxiliary channel and can aect work of auxiliary channel also. e evaluation of these eects is not obvious and it requires analysis. n auxiliary measurements method is one of the methods of correction the uninformative factors inuence to the overall measurements result. It is based on extracting of error caused by the inuence of these factors, and using it to correct measuring device transfer function. In particular, it can be done by separate measuring of each uninformative factors and subtracting the results of these measurements from the general result [1].