Vibratory flowmeter and methods and diagnostics for meter verification

Patent metadata

Field	Value
Publication number	US-2022390267-A1
Application number	US-202217883797-A
Country	US
Kind code	A1
Filing date	Aug 9, 2022
Priority date	Jan 24, 2014
Publication date	Dec 8, 2022
Grant date	—

Abstract

A vibratory flowmeter ( 5 ) for meter verification is provided, including meter electronics ( 20 ) coupled to the first and second pickoff sensors ( 170 L, 170 R) and coupled to a driver ( 180 ), with the meter electronics ( 20 ) configured to: vibrate the flowmeter assembly ( 10 ) in a single mode using the driver ( 180 ), determine a single mode current ( 230 ) of the driver ( 180 ) and determine first and second response voltages ( 231 ) generated by the first and second pickoff sensors ( 170 L, 170 R), respectively, compute frequency response functions for the determined first and second response voltages ( 231 ) from the determined single mode current ( 230 ), fit the generated frequency response functions to a pole-residue model, and verify proper operation of the vibratory flowmeter ( 5 ) using the meter stiffness value ( 216 ), residual flexibility ( 218 ), and the meter mass ( 240 ) in embodiments.

First claim

What is claimed is:

1 . A vibratory flow for meter verification, the vibratory flow ( 5 ) comprising:
a flowmeter assembly ( 10 ) including one or more flowtubes ( 130 , 130 ′) and first and second pickoff sensors ( 170 L, 170 R); a driver ( 180 ) configured to vibrate the one or more flowtubes ( 130 , 30 ′); and meter electronics ( 20 ) coupled to the first and second pickoff sensors ( 170 L, 170 R) and coupled to the driver ( 180 ), with the meter electronics ( 20 ) being configured to: vibrate the flowmeter assembly ( 10 ) in a single mode using the driver ( 180 ), determine a single mode current ( 230 ) of the driver ( 180 ) and determine first and second response voltages ( 231 ) generated by the first and second pickoff sensors ( 170 L, 170 R), respectively, compute frequency response functions for the determined first and second response voltages ( 231 ) from the determined single mode current ( 230 ), fit the generated frequency response functions to a pole-residue model to compute a meter mass value ( 240 ), and verify proper operation of the vibratory flowmeter ( 5 ) using the meter mass value ( 240 ).

2 . The vibratory flowmeter of claim 1 , with the meter electronics ( 20 ) being further configured to compute a difference of meter mass values at the first and second pickoff sensors ( 170 L and 170 R), and verify proper operation of the vibratory flowmeter ( 5 ) using the computed difference of the meter mass values.

3 . The vibratory flowmeter of claim 2 , wherein the verify operation of the vibratory flowmeter using the computed difference of the meter mass values includes: to determine a difference between the computed difference of the meter mass values and a baseline meter mass difference ( 245 ), and wherein the determined difference is compared to a predetermined mass difference range ( 246 ).

4 . The vibratory flowmeter of claim 2 , with the meter electronics ( 20 ) being further configured to compare the computed difference of the meter mass values to a predetermined mass difference range ( 246 ), generate a verification indication for the vibratory flowmeter ( 5 ) if the computed difference of the meter mass values falls within the predetermined mass difference range ( 246 ), and generate a non-verification indication for the vibratory flowmeter ( 5 ) if the computed difference of the meter mass values does not fall within the predetermined mass difference range ( 246 ).

5 . The vibratory flowmeter of claim 1 , with the meter electronics ( 20 ) being further configured to utilize a fluid density to compute an expected mass deviation ( 250 ) for the first and second pickoff sensors ( 170 L and 170 R), and verify proper operation of the vibratory flowmeter ( 5 ) using the expected mass deviation ( 250 ).

6 . The vibratory flowmeter of claim 5 , wherein the fluid density includes at least one of a measured fluid density and an inputted expected fluid density.

7 . The vibratory flowmeter of claim 5 , with the meter electronics ( 20 ) being further configured to compute a difference of expected mass deviation values at the first and second pickoff sensors ( 170 L and 170 R), and verify proper operation of the vibratory flowmeter ( 5 ) using the computed difference of the expected mass deviation values.

8 . The vibratory flowmeter of claim 7 , wherein the verify operation of the vibratory flowmeter using the computed difference of the expected mass deviation values includes: to determine a difference between the computed difference of the expected mass deviation mass values and a baseline expected mass deviation difference ( 255 ), and wherein the determined difference is compared to a predetermined expected mass deviation difference range ( 256 ).

9 . The vibratory flowmeter of claim 7 , with the meter electronics ( 20 ) being further configured to compare the computed difference of the expected mass deviation values to a predetermined expected mass deviation difference range ( 256 ), generate a verification indication for the vibratory flowmeter ( 5 ) if the computed difference of the expected mass deviation values falls within the predetermined expected mass deviation difference range ( 256 ), and generate a non-verification indication for the vibratory flowmeter ( 5 ) if the computed difference of the expected mass deviation values does not fall within the predetermined expected mass deviation difference range ( 256 ).

10 . A meter verification method for a vibratory flowmeter, with the method comprising:
vibrating a flowmeter assembly of the vibratory flowmeter its a single mode using a driver; determining a single mode current of the driver and determining first and second single mode response voltages generated by first and second pickoff sensors, respectively; computing frequency response functions for the determined first and second response voltages from the determined single mode current; fitting the generated frequency response functions to a pole-residue model to generate a meter mass value ( 240 ); and verifying proper operation of the vibratory flowmeter ( 5 ) using the meter mass value ( 240 ).

11 . The meter verification method of claim 10 , with the meter electronics ( 20 ) further comprising computing a difference of meter mass values at the first and second pickoff sensors ( 170 L and 170 R), and verifying proper operation of the vibratory flowmeter ( 5 ) using the computed difference of the meter mass values.

12 . The meter verification method of claim 11 , wherein the verifying operation of the vibratory flowmeter using the computed difference of the meter mass values includes: determining a difference between the computed difference of the meter mass values and a baseline meter mass difference ( 245 ), and wherein the determined difference is compared to a predetermined mass difference range ( 245 ).

13 . The meter verification method of claim 11 , with the meter electronics ( 20 ) further comprising: comparing the computed difference of the meter mass values to a predetermined mass difference range ( 245 ), generating a verification indication for the vibratory flowmeter ( 5 ) if the computed difference of the meter mass values falls within the predetermined mass difference range ( 245 ), and generating a non-verification indication for the vibratory flowmeter ( 5 ) if the computed difference of the meter mass values does not fall within the predetermined mass difference range ( 245 ).

14 . The meter verification method of claim 10 , with the meter electronics ( 20 ) further comprising: utilizing a fluid density to compute an expected mass deviation ( 250 ) for the first and second pickoff sensors ( 170 L and 170 R), and verifying proper operation of the vibratory flowmeter ( 5 ) using the expected mass deviation ( 250 ).

15 . The meter verification method of claim 14 , wherein the fluid density includes at least one of a measured fluid density and an inputted expected fluid density.

16 . The meter verification method of claim 14 , with the meter electronics ( 20 ) further comprising: computing a difference of expected mass deviation values at the first and second pickoff sensors ( 170 L and 170 R), and verifying proper operation of the vibratory flowmeter ( 5 ) using the computed difference of the expected mass deviation values.

17 . The meter verification method of claim 16 , wherein the verifying operation of the vibratory flowmeter using the computed difference of the expected mass deviation values includes: determining a difference between the computed difference of the expected mass deviation mass va

Assignees

• Micro Motion Inc

Inventors

• Cunningham Timothy J
• Kapolnek David J
• Rensing Matthew J
• Larsen Christopher George

Classifications

• G01F25/10 Primary

  of flowmeters · CPC title

• G01F1/8436 Primary

  signal processing · CPC title

• G01F1/84

  Coriolis or gyroscopic mass flowmeters · CPC title