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A notch filter in a vibratory flow meter

A notch filter, vibration instrument technology, applied in the direction of direct mass flow meter, volume measurement, mass flow measurement device, etc., can solve problems such as delay or phase offset

Pending Publication Date: 2020-02-04
MICRO MOTION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, notch filters can cause delays or phase shifts in the resonant components at the passband portion of the notch filter
This phase delay or shift can shift the frequency of the drive tone away from the resonant frequency of the sensor assembly

Method used

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  • A notch filter in a vibratory flow meter
  • A notch filter in a vibratory flow meter
  • A notch filter in a vibratory flow meter

Examples

Experimental program
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Embodiment Construction

[0031] Figure 1-10 And the following description depicts specific examples to teach those skilled in the art how to make and use the best mode of the embodiment of the notch filter in the vibration meter. For the purpose of teaching the principles of the invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations from these examples that fall within the scope of this description. Those skilled in the art will appreciate that the following features can be combined in various ways to form multiple variations of notch filters in vibration meters. As a result, the following embodiments are not limited to the specific examples described below, but only by the claims and their equivalents.

[0032] The notch filter can provide resonant components to the drive signal generator by filtering out non-resonant components while allowing resonant components to pass through. In order to ensure that there is a zero phase shift of ...

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PUM

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Abstract

A meter electronic device (20) having a notch filter (26) configured to filter a sensor signal from a sensor assembly (10) in a vibratory meter (5) is provided. The meter electronic device (20) includes the notch filter (26) communicatively coupled to the sensor assembly (10). The meter electronics (20) is configured to receive the sensor signal from the sensor assembly (10), the sensor signal being composed of a first component at a resonant frequency of the sensor assembly (10) and a second component at a non-resonant frequency; and to pass the first component and substantially attenuate thesecond component with the notch filter, wherein the first component is passed with substantially zero phase shift.

Description

Technical field [0001] The following embodiments relate to a vibrating flow meter, and more specifically to a notch filter in the vibrating flow meter. Background technique [0002] Vibration meters, such as, for example, Coriolis flow meters, liquid density meters, gas density meters, liquid viscosity meters, gas / liquid specific gravity meters, gas / liquid relative density meters, and gas molecular weight meters are generally known and used For measuring the characteristics of fluids. Generally, vibration meters include sensor assemblies and meter electronics. The material in the sensor assembly can be flowing or static. Each type of sensor assembly can have unique characteristics that the meter must take into account in order to achieve optimal performance. For example, some sensor assemblies may require the tube-type device to vibrate at a specific displacement level. Other sensor assembly types may require special compensation algorithms. [0003] In addition to performing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F25/00G01F15/02G01F1/84
CPCG01F25/10G01F15/02G01F1/8436G01F1/8431G01F1/8472G01F1/8477G01F15/024G01F1/84G01F25/00
Inventor M.J.任兴T.J.坎宁安
Owner MICRO MOTION INC