Target Level Detecting Sensor Using Electrostatic Capacity and Sensing Pad Therefor and Method for Sensing of Target Level

摘要

The target capacitive sensing sensor according to an embodiment of the present invention has the same electrical characteristics and includes a first conductive pad and a second conductive pad sequentially disposed on the outer surface of the tank along the direction of increasing the level of the fluid in the tank The second conductive pad may include a sensing pad disposed higher than the first conductive pad, a guide pad disposed on the outer surface of the tank so as not to interfere with the sensing pad, and a case where the level of the fluid does not reach the height of the first conductive pad. When the capacitance value of the first conductive pad and the capacitance value of the second conductive pad are equal to each other in order to distinguish the case where the fluid level exceeds the height of the second conductive pad and reaches the predetermined target water level, And a capacitive sensor IC configured to measure the capacitance of the sensing pad while changing the capacitance of the sensing pad.