DUAL TUBE CORIOLIS FLOW METER WITH A CENTRAL STATIONARY PLATE SERVING AS SUPPORT FOR DRIVER AND PICK-OFF COMPONENTS

• US 20110041623A1
• Filed: 05/09/2008
• Published: 02/24/2011
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: Micro Motion Incorporated (Emerson Electric Company)
• Original Assignee: Micro Motion Incorporated (Emerson Electric Company)
• Inventors: Lanham, Gregory Treat, Werbach, Christopher A.
• Granted Patent: US 8,590,398 B2
• Time in Patent Office: Days
• US Class Current: 73/861.357
• CPC Class Codes: G01F 1/8409 constructional details
• CPC Class Codes: G01F 1/8418 motion or vibration balancing means
• CPC Class Codes: G01F 1/8477 with multiple measuring conduits

Abstract

A flow meter (30) is provided that includes first and second flow tubes (103, 103′). The flow meter (30) also includes a stationary plate (250). At least a portion of the stationary plate (250) is positioned between the first and second flow tubes (103, 103′). At least one of a driver component or a pick-off components is coupled to the stationary plate (250).

Claims

1. A flow meter (30) including first and second flow tubes (103, 103′

), comprising;

a stationary plate (250), with at least a portion of the stationary plate (250) positioned between the first and second flow tubes (103, 103′

); and

at least one of a driver component or a pick-off component coupled to the stationary plate (250).

2. The flow meter (30) of claim 1, wherein the entire stationary plate (250) is positioned between the first and second flow tubes (103, 103′

).

3. The flow meter (30) of claim 1, wherein the driver component comprises a drive coil (104B) and the flow meter (30) further comprises a drive magnet (104A) coupled to one of the first or second flow tubes (103, 103′

) proximate the drive coil (104B).

4. The flow meter (30) of claim 1, wherein the driver component comprises a first drive coil (104B) coupled to a first side of stationary plate (250) and further comprising a second drive coil (104B) coupled to a second side of the stationary plate (250).

5. The flow meter (30) of claim 4, further comprising a first drive magnet (104A) coupled to the first flow tube (103) proximate the first drive coil (104B) and a second drive magnet (104A) coupled to the second flow tube (103′

) proximate the second drive coil (104B).

6. The flow meter (30) of claim 1, wherein the pick-off component comprises a pick-off coil (105B, 106B) coupled to the stationary plate (250) and the flow meter (30) further comprises a pick-off magnet (105A, 106A) coupled to one of the first or second flow tubes (103, 103′

) proximate the pick-off coil (105B, 106B).

7. The flow meter (30) of claim 1, wherein the pick-off component comprises a first pick-off coil (105B) coupled to the stationary plate (250) and further comprising a second pick-off coil (106B) coupled to the stationary plate (250).

8. The flow meter (30) of claim 7, further comprising a first pick-off magnet (105A) coupled to the first flow tube (103) proximate the first pick-off coil (105B) and a second pick-off magnet (106A) coupled to the second flow tube (103′

) proximate the second pick-off coil (106B).

9. The flow meter (30) of claim 7, further comprising one or more counter balances 415 coupled to first and second flow tubes 103, 103′

.

10. The flow meter (30) of claim 7, further comprising a second stationary plate (250), wherein one of the first pick-off coil (105B) or the second pick-off coil (106B) is coupled to the second stationary plate (250), while the other of the second pick-off coil (106B) or the first pick-off coil (105B) is coupled to the first stationary plate (250).

11. The flow meter (30) of claim 1, wherein the stationary plate (250) is connected to meter electronics (20).

12. The flow meter (30) of claim 1, wherein the first and second flow tubes (103, 103′

) are adapted to vibrate with respect to the stationary plate (250).

13. A flow meter (30) including first and second flow tubes (103, 103′

), comprising;

a stationary plate (250), with at least a portion of the stationary plate (250) positioned between the first and second flow tubes (103, 103′

), wherein the first and second flow tubes (103, 103′

) are adapted to vibrate with respect to the stationary plate (250);

a first pick-off sensor (105) including a first pick-off coil (105B) coupled to the stationary plate (250) and a first pick-off magnet (105A) coupled to the first flow tube (103) proximate the first pick-off coil (105B);

a second pick-off sensor (106) including a second pick-off coil (106B) coupled to the stationary plate (250) and a second pick-off magnet (106A) coupled to the second flow tube (103′

) proximate the second pick-off coil (106B); and

a driver (104) including a first drive coil (104B) coupled to the stationary plate (250) and a first drive magnet (104A) coupled to one of the first or second flow tubes (103, 103′

) proximate the first drive coil (104B).

14. The flow meter (30) of claim 13, wherein the entire stationary plate (250) is positioned between the first and second flow tubes (103, 103′

).

15. The flow meter (30) of claim 13, wherein the first drive coil (104B) is coupled to a first side of the stationary plate (250) and the first drive magnet (104A) is coupled to the first flow tube (103), the driver (104) further comprising a second drive coil (104B) coupled to a second side of the stationary plate (250) and a second drive magnet (104A) coupled to the second flow tube (103′

) proximate the second drive coil (104B).

16. The flow meter (30) of claim 13, further comprising one or more counter balances 415 coupled to the first and second flow tubes (103, 103′

).

17. The flow meter (30) of claim 13, wherein the stationary plate (250) is connected to meter electronics (20).