Parallel dipole line trap viscometer and pressure gauge

Patent metadata

Field	Value
Publication number	US-10627330-B2
Application number	US-201816029556-A
Country	US
Kind code	B2
Filing date	Jul 7, 2018
Priority date	Aug 14, 2015
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

Techniques for gas analysis using a parallel dipole line (PDL) trap viscometer are provided. In one aspect, a gas analysis system is provided which includes: a PDL trap including: a pair of diametric cylindrical magnets, and a diamagnetic rod levitating above the magnets; and a motion detector for capturing motion of the diamagnetic rod. The motion detector can include a digital video camera positioned facing a top of the PDL trap so as to permit capturing video images of the diamagnetic rod and the system can include a computer for receiving and analyzing video images from the video camera. Methods for measuring gas viscosity and pressure using the PDL trap system are also provided.

First claim

What is claimed is:

1. A gas analysis system, comprising:
a parallel dipole line (PDL) trap comprising: a pair of diametric cylindrical magnets, and a diamagnetic rod levitating above the pair of diametric cylindrical magnets; and
a motion detector for capturing motion of the diamagnetic rod,
wherein the PDL trap is encased within an enclosure comprising an inlet door to permit a gas to be introduced into the enclosure, and wherein the gas analysis system further comprises a platform, on which the PDL trap is situated, attached to an inner surface of the enclosure via a pivoting link.

2. The gas analysis system of claim 1 , wherein the diamagnetic rod comprises a graphite rod.

3. The gas analysis system of claim 1 , wherein the diamagnetic rod has a diameter of from 0.3 mm to 1.3 mm and ranges therebetween.

4. The gas analysis system of claim 1 , wherein the motion detector comprises a digital video camera positioned facing a top of the PDL trap so as to permit capturing video images of the diamagnetic rod.

5. The gas analysis system of claim 4 , further comprising a computer for receiving and analyzing video images from the digital video camera.

6. The gas analysis system of claim 1 , further comprising:
stopper guards on opposite ends of the PDL trap to prevent the diamagnetic rod from traveling past the ends of the PDL trap.

7. The gas analysis system of claim 6 , wherein the stopper guards are formed from a non-magnetic material.

8. The gas analysis system of claim 7 , wherein non-magnetic material is selected from the group consisting of: rubber and plastic.

9. The gas analysis system of claim 1 , further comprising:
an actuator attached to a top of the enclosure and to an end of the platform opposite the pivoting link.

10. The gas analysis system of claim 9 , wherein the actuator comprises a solenoid actuator.

11. The gas analysis system of claim 9 , wherein the actuator is configured to raise the platform to an angle θ of from 10° to 30° and ranges therebetween relative to a bottom of the enclosure.

12. The gas analysis system of claim 9 , wherein the actuator comprises a shape memory alloy.

13. The gas analysis system of claim 12 , wherein the shape memory alloy is configured to contract by a constant amount with an applied current.

14. A gas analysis system, comprising:
a PDL trap encased within an enclosure, the PDL trap comprising: a pair of diametric cylindrical magnets, and a diamagnetic rod levitating above the pair of diametric cylindrical magnets;
a platform, on which the PDL trap is situated, attached to an inner surface of the enclosure via a pivoting link; and
a motion detector for capturing motion of the diamagnetic rod, wherein the motion detector comprises a digital video camera at a top of the enclosure positioned facing a top of the PDL trap so as to permit capturing video images of the diamagnetic rod.

15. The gas analysis system of claim 14 , further comprising:
an actuator attached to a top of the enclosure and to an end of the platform opposite the pivoting link.

16. The gas analysis system of claim 15 , wherein the actuator comprises a shape memory alloy.

Assignees

• IBM

Inventors

• Gunawan Oki
• Virgus Yudistira

Classifications

• G01N27/00

  Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R) · CPC title

• G01N11/16 Primary

  by measuring damping effect upon oscillatory body · CPC title

• G01N2011/147

  Magnetic coupling · CPC title