Detecting unit of Coriolis quality flow meter

A technology of mass flowmeter and detection unit, applied in direct mass flowmeter, mass flow measuring device, measuring device, etc., to achieve the effects of ensuring measurement accuracy, improving distribution structure, and accurate motion state

Active Publication Date: 2009-04-22
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional magnetoelectric detection unit has nonlinear influence factors, and the non-uniformity of the direction and density of the magnetic field is the main reason for this nonlinear influence

Method used

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  • Detecting unit of Coriolis quality flow meter
  • Detecting unit of Coriolis quality flow meter
  • Detecting unit of Coriolis quality flow meter

Examples

Experimental program
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Embodiment Construction

[0015] Such as image 3 As shown, the present invention is composed of two parts: a magnetic steel part and a coil part. The magnetic steel part includes a base (1), a ring magnet (2) and a central magnetic conductor (3). The magnetic steel part passes through the base ( 1) Installed in the positioning device of the measuring tube (6) and fixedly connected by screws. The coil part includes a detection coil (4) and a coil bobbin (5), the detection coil (4) is evenly wound in the fixing slot of the coil bobbin (5), and the coil bobbin (5) is installed in the positioning device of the measuring tube (7) , The connection is fixed by screws. The ring magnet (2) is made of samarium cobalt SmCo rare-earth permanent magnet material, and the base (1) and the central magnetic conductor (3) are made of high permeability MnZn ferrite material.

[0016] As shown in Figure 4, the magnetic steel part of the present invention is composed of a base (1), a ring magnet (2) and a central magnetic con...

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Abstract

A detection unit of Carioles mass flowmeter is prepared as fixing central magnetic conductor and ring magnetic steel on base to form circular gap between the two and to form uniform parallel magnetic field, moving detection coil and coil frame in formed circular gap to cut magnetic line for outputting signal in proportion to moving speed.

Description

Technical field [0001] The invention relates to a detection unit of a Coriolis mass flowmeter. Background technique [0002] Coriolis mass flowmeter (CMF) generally uses a magnetoelectric method to convert the vibration signal of the flowmeter into an electrical signal, and uses a circuit to detect the phase difference between the two signals proportional to the mass flow rate, and then calculate The mass flow rate of the fluid. The detection unit is the key component of the CMF to pick up the signal, which affects the measurement accuracy of the CMF. At present, the more common magnetoelectric detection unit generally adopts the method of coil cutting magnetic force line to realize the conversion of mechanical vibration signal to electrical signal. figure 1 It is a schematic diagram of the structure of a traditional detection unit, which is mainly composed of a base 1, a cylindrical magnetic steel 2, a coil 3 and a coil bobbin 4. The cylindrical magnetic steel 2 is fixed on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00G01F1/84
Inventor 樊尚春郑德智邢维巍乔少杰
Owner BEIHANG UNIV
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