Capacitive level sensor circuit

• Main Author: JUNG KYEONG-JIN
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The present invention relates to a capacitive level sensor circuit. The capacitive level sensor circuit for preventing unnecessary and frequent sensing and chattering due to the sloshing of a liquid, according to one embodiment of the present invention, is applied to a capacitive level sensor, which comprises a sensor rod forming a first electrode and a hollow guard pipe separately accommodating a part of the sensor rod and forming a second electrode, and is integrated into a circuit board provided inside the guard pipe and measures a liquid level by sensing a variation in capacitance via the first and second electrodes. The capacitive level sensor circuit comprises: a sensor circuit unit which comprises a capacitor having a predetermined amount of capacitance and a first control unit for comparing the capacitance of the capacitor and the capacitance measured via the first and second electrodes and outputting a high or low signal, and which has multiple communication ports having a clock line and a data line