METHOD AND SYSTEM TO EVALUATE INTEGRITY OF SENSOR BY USING VIRTUAL MULTI-SENSOR TECHNOLOGY

摘要

According to an embodiment of the present invention, a system to evaluate the integrity of various sensors in real time in an operation state of an industrial plant includes: a virtual multi sensor part measuring an operation state of the same driving environment area by including multiple sensors of the same kind for each area made by dividing the industrial plant by the same driving environment; a comparing part calculating a signal difference value by comparing a normal signal value, calculated for the same driving environment condition as a current driving mode, with a current signal value, obtained from the sensors; and a determining part determining the functional integrity of each of the sensors based on signal difference values of each of the sensors. In order to overcome a signal difference value between the sensors, caused by physically different setting positions of the virtual multi-sensors, an absolute variation of a sensor signal is measured and compared between the virtual multi-sensors, and therefore, even if a difference is made between a normal signal value and a current signal value of the virtual multi-sensors depending on a position of the sensors due to the structure of the industrial plant, the integrity of the sensors is determined depending on whether the signal difference value keeps the same level.;COPYRIGHT KIPO 2016