Electromagnetic water meter sensor self-diagnosis system

• Main Authors: YU KAIXUAN, ZHOU ZHIGANG, FENG XU, WU ZHICHAO, ZHOU FANGJIE, KIM HAK-SEONG
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The utility model discloses a self-diagnosis system of an electromagnetic water meter sensor, which comprises a signal sampling and control circuit connected with an excitation drive circuit and an insulation detection circuit; the signal sampling and control circuit comprises an MCU, and the MCU is connected with an AD sampling circuit and a temperature and humidity sensor. Whether a magnet exciting coil of the sensor is short-circuited or not, ground insulation is poor or the sensor is affected with damp and water enters is judged, self-diagnosis of the electromagnetic water meter sensor is achieved, an instrument displays a diagnosis result and remotely transmits an alarm, wrong metering is avoided in time, and on-site disassembly and inspection are not needed. When the coil resistance of the sensor, the ground insulation resistance of the coil and the internal temperature and humidity of the coil exceed alarm threshold values, the instrument prompts alarm content and measured values through liquid crystal