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Coriolis flowmeter, timing prediction system, and timing prediction method

A Coriolis flowmeter and Coriolis technology, applied in the direction of direct mass flowmeter, mass flow measurement device, liquid/fluid solid measurement, etc., can solve the problem of not being able to know the progress of U-shaped tube corrosion U-shaped tube

Active Publication Date: 2019-08-13
YOKOGAWA ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The corrosion status of the U-shaped pipe and the deterioration of the attached matter can be known only by the above-mentioned alarm, but the progress of the corrosion of the U-shaped tube and the adhesion to the U-shaped tube cannot be known.

Method used

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  • Coriolis flowmeter, timing prediction system, and timing prediction method
  • Coriolis flowmeter, timing prediction system, and timing prediction method
  • Coriolis flowmeter, timing prediction system, and timing prediction method

Examples

Experimental program
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Effect test

no. 1 Embodiment approach 〕

[0032]

[0033] figure 1 It is a block diagram showing the configuration of main parts of the Coriolis flowmeter according to the first embodiment of the present invention. Such as figure 1 As shown, the Coriolis flowmeter of this embodiment has a Coriolis sensor unit 1, a current amplifier 2, an amplifier 3, a smoothing circuit 4, a control amplifier 5, a voltage setting unit 6, a switch 7, a multiplier 8, and an operation control unit 9 and amplifier 12.

[0034] The Coriolis sensor unit 1 has a U-shaped tube 20 (vibration tube), a vibrator 10 (drive unit), and sensors 11a, 11b. The U-shaped pipe 20 is a U-shaped pipe formed of a bendable material such as metal such as stainless steel, resin, or rubber. A fluid to be measured flows through the U-shaped tube 20 . The vibrator 10 vibrates the U-shaped tube 20 by the drive current supplied from the current amplifier 2 .

[0035] The sensors 11 a and 11 b are sensors for detecting vibration of the U-shaped tube 20 . Thes...

no. 2 Embodiment approach 〕

[0167]

[0168] Figure 8 It is a block diagram showing the configuration of main parts of the time forecast system according to the second embodiment of the present invention. Such as Figure 8 As shown, the timing prediction system 30 of this embodiment has a Coriolis flowmeter 31 and a computing device 32 . The Coriolis flowmeter 31 and the computing device 32 are connected via a communication path C such as a wired or wireless network, a communication line, or a transmission line. The Coriolis flowmeter 31 and the computing device 32 are capable of transmitting and receiving various data with each other.

[0169] Coriolis flowmeter 31 is with figure 1 The shown Coriolis flowmeter has substantially the same structure, and measures the flow rate of the fluid flowing through the U-shaped tube 20 based on the Coriolis force acting on the U-shaped tube 20 vibrated by the driving force given by the vibrator 10 . Here, the Coriolis flowmeter 31 of this embodiment can be omi...

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Abstract

A Coriolis flowmeter includes a change ratio obtainer configured to obtain a change ratio of vibration of a vibration tube when the vibration tube is vibrated with a constant driving force by causinga switch to select a fixed gain setting voltage, a calculator configured to calculate a first parameter indicating at least one of a spring constant of the vibration tube and a damping coefficient ofthe vibration tube on the basis of the change ratio obtained by the change ratio obtainer and the constant driving force, and a predictor configured to predict at least one of a time, an operating time, and an integrated flow rate of a fluid flowing in the vibration tube required for a state of the vibration tube to become a state requiring maintenance, using the first parameter calculated by thecalculator or a second parameter obtained by performing a predetermined calculation on the first parameter.

Description

technical field [0001] The invention relates to a Coriolis flowmeter, a period prediction system and a period prediction method. [0002] This application claims priority to Japanese Patent Application No. 2018-018395 filed on February 5, 2018, the content of which is incorporated herein. Background technique [0003] As one form of flow meters used in workshops, Coriolis flow meters are known. The Coriolis flowmeter vibrates the U-shaped tube through which the fluid flows through the excitation of the coil, and measures the Coriolis force generated by the fluid passing through the U-shaped tube through twisting of the U-shaped tube. The Coriolis force increases according to the flow rate of the fluid, so the flow rate can be measured through the twisted amplitude and phase of the U-shaped tube. [0004] The Coriolis flowmeter uses the distortion of the U-shaped tube to measure the flow. Therefore, if the corrosion of the U-shaped tube etc. deepens, an error will occur in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/84G01N29/11G01N29/44
CPCG01F1/84G01F1/8436G01N29/11G01N29/44G01F25/10G01F1/8459
Inventor 知见吉纮
Owner YOKOGAWA ELECTRIC CORP