Metering device based on tunnel giant magneto resistive effect

• Main Authors: ZHAO YONG, LIU XUN, LEI XINMIN
• Format: Patent
• Language: Chinese; English
• Published: 17.09.2014
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The utility model relates to the field of fluid metering, in particular to a metering device based on the tunnel giant magneto resistive effect. The metering device comprises a metering component based on a tunnel giant magnetic sensor, a central processor, a dual-port EEPROM component with an NFC function, and the three-axis tunnel giant magnetic sensor preventing strong magnetic attack. When a rotary impeller rotates, the metering component based on the tunnel giant magnetic sensor generates corresponding pulse strings, the pulse strings enter the central processor through a data line, the pulse strings are processed by the central processor in a counting mode, and the passive dual-port EEPROM component with the NFC function can prevent the problem that the flow cumulant of the EEPROM can not be read under the condition that batteries run out or an MCU and other electronic devices are damaged in the non-machine character wheel reading process. The tunnel giant magnetic sensor technology is adopted, and the