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

Active Publication Date: 2010-10-27
王建国 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that the output amplitude is low, only about 1V, and the pulse width is only 30 microseconds.
It is not conducive to long-distance signal transmission, and can only be used for short-distance collection and processing

Method used

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  • Intelligent flow meter adopting TMR (Tele Meter Reading) magnetic sensor
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  • Intelligent flow meter adopting TMR (Tele Meter Reading) magnetic sensor

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Embodiment Construction

[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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PUM

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Abstract

The invention relates to an intelligent flow meter adopting a TMR (Tele Meter Reading) magnetic sensor, comprising a TMR flow meter sensor, a flow meter shell, a rotational impeller, a rotational impeller stand, a small magnet with an upward N pole, a small magnet with an upward S pole, a flow meter inlet / outlet, a magnetic shielding layer and a protection layer isolated a flow meter chip from fluid. When fluid to be measured exists, the measured fluid drives the rotational impeller to rotate so as to drive the small magnet with the upward N pole and the small magnet with the upward S pole to rotate simultaneously, and the TMR magnetic sensor induces a magnetic field so as to achieve the purpose of metering. The invention has the advantages of tiny power consumption, wide working frequency range and working temperature range, firm structure, small size, long service life, convenient installation, shock resistance, clear output wave shape without vibration, high position repeating accuracy, simple electromagnetic shielding structure, reverse rotation error prevention calculation, and the like.

Description

technical field [0001] The invention relates to a flow meter, in particular to an intelligent flow meter using a TMR magnetic sensor. Background technique [0002] Usually the sensors used for flowmeter signal acquisition are mainly dry reed switches, Hall elements and Wiegand sensors. [0003] The magnet and the reed switch are used as the sensing system to extract the signal. When the magnet is close to the reed switch reed, when the magnetic force is large enough to overcome the spring force of the reed switch, the reed switch will attract and short-circuit; when the magnet is far away from the reed switch, it will attract When the force is less than the elastic force, the reeds separate, that is, a pulse is sent. The dry reed switch has the characteristics of convenient use, low price, and simple installation. However, as a contact switch, it has inherent defects such as poor pulse waveform, poor maintainability, easy contact vibration, and easy interference by externa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/58
Inventor 王建国薛松生
Owner 王建国
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