Intelligent flow meter adopting TMR (Tele Meter Reading) magnetic sensor
A magnetic sensor and flowmeter technology, applied in the field of flowmeters, can solve the problems of low output amplitude, unfavorable signal remote transmission, etc., and achieve the effects of small power consumption, firm structure, and wide operating temperature range
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[0023] The invention relates to an intelligent flow meter using a TMR magnetic sensor. Including: flowmeter casing, rotating impeller, rotating impeller bracket, a small magnet with N pole facing upward and a small magnet with S pole facing upward, inlet and outlet of flowmeter, magnetic shielding layer, protective layer to isolate flowmeter chip from fluid , Flow meter chip (TMR sensor chip, wireless and wired data transceiver module, data display panel and system and power management module).
[0024] The present invention will be further elaborated below in conjunction with the accompanying drawings.
[0025] The structure of the TMR tunnel junction magnetoresistance effect element, such as figure 1 As shown in (a), it consists of nanoscale multilayer films: pinned layer 1, magnetic pinned layer 2, nonmagnetic oxide layer 3, and magnetic free layer 4. The magnetic moment direction of the magnetic pinned layer 2 is shown in FIG. 5 . The magnetic moment direction of the ma...
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