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A measurement state monitoring method and device for a Coriolis mass flowmeter

A mass flow meter and Coriolis technology, applied in the direction of measuring devices, measuring flow/mass flow, testing/calibrating devices, etc., can solve the problems of wasting time and manpower, avoid disassembly costs, save manpower, and major Engineering Significant Effects

Active Publication Date: 2018-06-05
XIAN DONGFENG MACHINERY & ELECTRONICS
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Problems solved by technology

[0004] The purpose of the present invention is to: propose a brand-new method and device for monitoring the measurement state of a Coriolis mass flowmeter, which solves the technical problems of wasting time, manpower, material resources and financial resources caused by traditional off-line monitoring

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  • A measurement state monitoring method and device for a Coriolis mass flowmeter
  • A measurement state monitoring method and device for a Coriolis mass flowmeter
  • A measurement state monitoring method and device for a Coriolis mass flowmeter

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Embodiment Construction

[0034] The basic principle of mass flow meter measurement is the Coriolis effect of a liquid in a vibrating tube. In a typical mass flow meter application, the driving coil 106 of the vibrating tube itself and the driving permanent magnet 206 interact to apply a driving force to the vibrating tube, so that the vibrating tube vibrates at a certain frequency. When no liquid flows through the vibrating tube, all points on the vibrating tube vibrate with the same phase, such as Figure 2a . When a liquid flows through the vibrating tube, the vibrating tube is subjected to the Coriolis force generated by the liquid ( Figure 2b The effect of Fc) in , the Coriolis force makes each point of the vibrating tube produce different phases, such as Figure 2b . The Coriolis force on the AC segment and the BD segment is the same in magnitude and opposite in direction (such as Figure 2b Fc direction shown in). The left detection coil 103 and the right detection coil 205 are placed on t...

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Abstract

The invention provides a measurement state monitoring method and device of a Coriolis mass flowmeter, which replaces the Coriolis force Fc generated by the liquid passing through the vibrating pipeline by applying the equivalent driving force F to ensure the equivalent driving force F and the Coriolis force The effect of Fc is the same, and the phase difference is generated on both sides of the vibrating tube of the sensor when the liquid is not circulated, and the flow transmitter displays the mass flow value when the liquid is circulated through continuous detection and calculation. By changing the magnitude of the equivalent driving force F and comparing the difference between the flow value qm' displayed by the transmitter and the assumed flow qm, the working state of the flowmeter can be monitored when the liquid is blocked. The device includes an application device of an equivalent driving force F, the effect of the equivalent driving force F is the same as that of the Coriolis force Fc, and the application position and magnitude of the equivalent driving force F satisfy the torque condition 2F·d=T.

Description

technical field [0001] The invention relates to the monitoring field of flow meters, in particular to a measurement state monitoring method and device of a Coriolis mass flow meter. Background technique [0002] A Coriolis mass flowmeter (hereinafter referred to as a mass flowmeter) is an instrument that can directly measure the mass flow of a liquid, and is currently widely used in various fields of national production. In order to ensure the accuracy and reliability of the measurement data of the mass flowmeter, the common practice is to perform periodic calibration. The "Measurement Verification Regulations of the People's Republic of China" stipulates that the verification cycle of the mass flowmeter is 0.5 years / time to 2 years / time , Whether the actual measurement status of the qualified instrument in the actual engineering application can be guaranteed, only after the validity period of the verification is over, can it be accurately judged after returning to the verif...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00
CPCG01F1/8436G01F25/10
Inventor 张鹏郁周王瑞任建新尹忠奇
Owner XIAN DONGFENG MACHINERY & ELECTRONICS
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