CN1186236A - Ununiform probe of capacitor sensor - Google Patents
Ununiform probe of capacitor sensor Download PDFInfo
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- CN1186236A CN1186236A CN96114153A CN96114153A CN1186236A CN 1186236 A CN1186236 A CN 1186236A CN 96114153 A CN96114153 A CN 96114153A CN 96114153 A CN96114153 A CN 96114153A CN 1186236 A CN1186236 A CN 1186236A
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- medium
- medium socket
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Abstract
A non-uniform probe of capacitance sensor for measuring the water content in crude oil or measuring humidity features that the influence of mineralized degree of stratum water on output signals is eliminated. Its technical key is to use different medium thickness to regulate the potential drop in medium layer, resulting in an axial potential difference on the surface of medium layer, which is realized by making the medium jacket have thin end and thick middle part. The midium jacket has the parameters: the diameter ratio of thin to thick layers is 8 : 9, their length ratio is 3 : 5, and the ratio of medium layer thickness at electrode top to total length of medium jacket is 1 : 10.
Description
The present invention relates to a kind of ununiform probe of capacitor sensor, be used to measure crude oil water content.
The critical piece that utilizes the uhf electromagnetic wave harmonic technology to measure crude oil water content is a sensing probe, and when the water percentage of crude oil changed, the probe electric capacity changed thereupon, has realized that the oscillation frequency of resonant tank is subjected to water percentage tuning.Chinese patent " uhf sensor of down-hole water witch (ZL87201552.1) " was once arranged, its sensing probe adopts the coaxial-type capacitor of using till today, through facts have proved, when water is external phase, output signal increases with the increase of stratum water salinity, make relative error of measurement greatly to about 30%, lose practical prospect.
The objective of the invention is to provide a kind of ununiform probe of capacitive transducer, reservoir water salinity is reduced near zero the influence of output signal.
Experimental results show that, the output signal of ununiform probe of capacitor sensor can be regulated by adjusting medium socket thickness and relative length vertically thereof by the influence of salinity, therefore select correct medium socket structural parameters, can eliminate the influence of salinity output signal.So designing on the sonde configuration basis that is complementary with sensing circuit, the Rational structure and the size of the outer medium socket of design electrode are key problem in technology of the present invention.The object of the present invention is achieved like this, and the outer medium socket of electrode is designed to boss shape, and promptly the medium socket diameter of electrode tip part is slightly little, be called thin layer, center section medium socket diameter is big slightly, is called thick-layer, and the other end of medium socket and sensor adapter sleeve are fixed together.If the diameter of thick-layer is a, length is h, and the diameter of establishing thin layer is b, and length is c, and the thickness of dielectric layers of establishing electrode tip is d.Then the physical dimension of electrode medium socket is determined than formula by following: b: a=8: 9, and d: e=1: 10, c: h=3: 5.
Accompanying drawing is the structural representation according to ununiform probe of capacitor sensor provided by the present invention.
Among the figure, 1-adapter sleeve, sensor circuit assembly, 3-medium socket, 4-uniconductor electrode.A is a medium socket thick-layer diameter, and b is a medium socket thin layer external diameter, and c is a medium socket thin layer length, and d is the thickness of electrode tip dielectric layer, and e is the total length of medium socket, and f is medium socket and adapter sleeve fixed part length, and h is the length of medium socket thick-layer.
Describing concrete structure of the present invention and size thereof in detail below in conjunction with drawings and Examples determines.
Key problem in technology of the present invention is after the design of having finished capacitive transducer, how to determine rational electrode medium socket structure and size, make no longer equipotential of dielectric layer surface, but certain potential difference (PD) is arranged vertically, make reservoir water salinity be reduced to zero the influence of probe output.Method provided by the present invention is that medium socket is designed to the boss shape structure, and promptly an end is thinner, and the centre is thicker, and the other end is fixed by adapter sleeve 1 and sensor.Medium socket 3 thicker part branches are called thick-layer, and its diameter a is identical with the diameter of adapter sleeve 1, are given value, and the total length e of medium socket 3 equals the total length of electrode, also are given value, and medium socket 3 also is a given value with the length f of adapter sleeve 1 fixed part.The physical dimension of medium socket 3 is determined than formula by following: b: a=8: 9, and d: e=1: 10, c: h=3: 5, from above analysis, be not difficult to determine structural parameters b, c, the d of medium socket.As embodiment, the sensor of down-hole water witch, its external diameter are 25mm, the electrode total length is 85mm, and the length of medium socket and adapter sleeve fixed part is 27mm, according to b: a=8: 9, d: e=1: 10, c: h=3: 5, this moment is known, a=25mm, e=85mm, f=27mm, b=(8: 9) * a=22.2mm then, d=(1: 10) * e=8.5mm, from formula c+h+f=e and c: h=3: 5 can obtain c=21.7mm, h=36.3mm.
Claims (1)
- A kind of ununiform probe of capacitor sensor, form by circuit assembly, uniconductor electrode, medium socket, adapter sleeve etc., it is characterized in that, medium socket is designed to the boss shape structure, and promptly an end is thinner, and the centre is thicker, thicker part is divided into thick-layer, its diameter a is identical with the diameter of adapter sleeve, and thin part is a thin layer, and its diameter b is pressed b: a=8: 9 determine; The thickness of dielectric layers d of electrode tip: medium socket total length e=1: 10; Thin layer length c: thick-layer length h=3: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114153A CN1186236A (en) | 1996-12-27 | 1996-12-27 | Ununiform probe of capacitor sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114153A CN1186236A (en) | 1996-12-27 | 1996-12-27 | Ununiform probe of capacitor sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1186236A true CN1186236A (en) | 1998-07-01 |
Family
ID=5121968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96114153A Pending CN1186236A (en) | 1996-12-27 | 1996-12-27 | Ununiform probe of capacitor sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1186236A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344995C (en) * | 2003-01-16 | 2007-10-24 | 欧姆龙株式会社 | Capacitance sensor and detector using same for detecting object being caught by door |
| WO2009135390A1 (en) | 2008-05-06 | 2009-11-12 | Luo Pingan | A method and system for determining the constituent content of a multiphase fluid |
-
1996
- 1996-12-27 CN CN96114153A patent/CN1186236A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344995C (en) * | 2003-01-16 | 2007-10-24 | 欧姆龙株式会社 | Capacitance sensor and detector using same for detecting object being caught by door |
| WO2009135390A1 (en) | 2008-05-06 | 2009-11-12 | Luo Pingan | A method and system for determining the constituent content of a multiphase fluid |
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