Electrode-less detector

• US 4,820,990 A
• Filed: 10/09/1987
• Issued: 04/11/1989
• Est. Priority Date: 10/09/1987
• Status: Expired due to Fees

• Current Assignee: ZETA Management Limited
• Original Assignee: ZETA Management Limited
• Inventors: Moore, Zachary
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): Solis, Jose M.
• Application Number:
  US07/107,290
• Time in Patent Office: 550 Days
• Field of Search: 73/863.83, 73/863.84, 73/864.21, 73/864.34, 73/864.35, 73/864.16, 324/453, 324/445, 324/458, 324/453, 324/61 P, 324/65 P, 128/734
• US Class Current: 324/445
• CPC Class Codes: G01N 27/60 by investigating electrostatic variables , e.g. electrographic flaw testing G01N27/007 takes precedence

Abstract

An electrodeless apparatus for determining a function of the electrical charge condition in a flowable liquid media containing electrical charge influencing species comprising a tubular flow path member, the flow path member having electrically insulating walls, an open end and a closed end, the flow path being so disposed that it may be substantially filled with the liquid, a reciprocating member whose outer wall is electrically insulating disposed within the flow path member, the reciprocating member having a transverse cross-sectional configuration such that the reciprocating member fits adjacent but spaced from the electrically insulating walls of the flow path member, an annulus for admitting predetermined amounts of flowable material to the flow path member, a sensor disposed on the non-wetted side of the flow path member for developing a signal proportional to a desired ion activity by electrostatic or inductive coupling, and means coupled to said sensor for amplifying any electrical signal induced across said sensor.

Claims

1. An apparatus for sensing and quantifying without the addition of an externally induced potential the electrical charge condition in a flowable two phased liquid media containing electrical charge influencing species comprising a tubular flow path member, said flow path member having electrically insulating walls, an open end and a closed end, said flow path being so disposed that it may be substantially filled with said liquid, a reciprocating member whose outer wall is electrically insulating disposed within said flow path member for mechanically inducing the ions in said liquid to flow in more than one direction, said reciprocating member having a transverse cross-sectional configuration such that said reciprocating member fits adjacent but spaced from said electrically insulating walls of said flow path member and provides a controlled pressure drop, means for admitting predetermined amounts of flowable material to said flow path member, sensory means disposed on the non-wetted side of said flow path member for solely developing a signal proportional to a desired ion activity by electrostatic or inductive coupling, and means coupled to said sensory means for amplifying any electrical signal induced across said sensory means.

3. The apparatus of claim 1, wherein said sensory means develops said signal by electrostatic coupling.

7. The apparatus of claim 1, wherein said sensory means develops said signal by inductive coupling.

8. The apparatus of claim 7, wherein said sensory means comprises an electromagnetic coil.

9. The apparatus of claim 8, including a Faraday cage surrounding said sensory means.

2. An apparatus for sensing and quantifying electrical energy derived from zeta influenced ions in a flowable two phased liquid stream comprising:

an electrically insulated tubular flow path member having an open end and a closed end, said flow path member being disposed so as to be filled substantially with said liquid;

an electrically insulated reciprocating member disposed within said flow path, said reciprocating member having a transverse cross-sectional configuration whereby said reciprocating member fits adjacent but spaced from the walls of said flow path member, said reciprocating member causing the liquid in said flow path to flow in more than one direction and exciting ions in said liquid;

electrostatic coupling means for sensing said mechanically induced excited ions in said liquid, said coupling means being disposed on the non-wetted side of said flow path member which forms a barrier separating liquid from said coupling means, said coupling means developing a signal proportional to said mechanically induced ion activity; and

,

means for amplifying the electrical signals induced across said coupling means.

4. The apparatus of claim 2, wherein said sensory means comprises at least one electrical conductor.

5. The apparatus of claim 4, wherein there is present two conductors and the combined surface area of both of said conductors is not greater than the total fluid wetted surface of said flow path member.

6. The apparatus of claim 2, wherein a Faraday cage surrounds said sensory means.

10. The apparatus of claim 2, including a Faraday cage surrounding said sensory means.

11. An apparatus for sensing and quantifying electrical energy derived from zeta influenced ions in a flowable two phased liquid stream comprising:

an electrically insulated tubular flow path member having an open end and a closed end, said flow path member being disposed so as to be filled substantially with said liquid;

an electrically insulated reciprocating member disposed within said flow path, said reciprocating member having a transverse cross-sectional configuration whereby said reciprocating member fits adjacent but spaced from the walls of said flow path member, said reciprocating member causing the liquid in said flow path to flow in more than one direction and exciting ions in said liquid;

inductive coupling means for sensing said mechanically induced excited ions in said liquid, said coupling means being disposed on the non-wetted side of said flow path member which forms a barrier separating liquid from said coupling means, said coupling means developing a signal proportional to said mechanically induced ion activity; and

,

means for amplifying the electrical signals induced across said coupling means.