METHOD FOR REAL-TIME MONITORING OF OPERATING CONDITIONS OF CAPACITIVE SENSOR Russian patent published in 2019 - IPC G01R31/12 G01R31/02 G01R27/26 

FIELD: monitoring systems.

SUBSTANCE: invention relates to a method for real-time monitoring of operating conditions of a capacitive sensor. It is used, which is of special interest, but not the only one, in measurement of blades stroke in rotary machine or in turbomachine, such as turbojet engine or jet-prop engine of aircraft or, for example, turbine of electric generator. Invention has a wider scope, since it can be used in any system using a capacitive sensor in very difficult ambient conditions. Invention relates to a method for real-time monitoring of the operating condition of a capacitive sensor, suitable for mounting on a rotary machine and connected to an electronic measuring module through a high-frequency transmission line, wherein the method comprises the steps of: generating in the electronic module a signal for compensating parasitic capacitance of the transmission line and the sensor; generating in the electronic module a signal for compensation of parasitic conductivity of the transmission line and the sensor; picking up a signal characteristic of capacitance compensation and a signal characteristic of conductivity compensation to determine a sensor operating point; analyzing a working point for checking if it is in a given region.

EFFECT: high accuracy of monitoring the state of the sensor in real time.

17 cl, 4 dwg