CN101183125A - A device for measuring the dielectric properties of samples, its measuring method and application - Google Patents
A device for measuring the dielectric properties of samples, its measuring method and application Download PDFInfo
- Publication number
- CN101183125A CN101183125A CNA2007101789077A CN200710178907A CN101183125A CN 101183125 A CN101183125 A CN 101183125A CN A2007101789077 A CNA2007101789077 A CN A2007101789077A CN 200710178907 A CN200710178907 A CN 200710178907A CN 101183125 A CN101183125 A CN 101183125A
- Authority
- CN
- China
- Prior art keywords
- electrode
- sample
- length
- dielectric property
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims description 35
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 239000004809 Teflon Substances 0.000 claims description 10
- 229920006362 Teflon® Polymers 0.000 claims description 10
- 229910001369 Brass Inorganic materials 0.000 claims description 6
- 239000010951 brass Substances 0.000 claims description 6
- 238000006467 substitution reaction Methods 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 5
- 239000003989 dielectric material Substances 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 description 4
- 238000003556 assay Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000033999 Device damage Diseases 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
本发明涉及一种准确测定样品材料介电特性的仪器及方法和应用。所述装置包括芯轴1、内电极2、样品层3、外电极4、绝缘垫圈5、内电极引线6a和保护电极引线6b、6c，所述内电极2长度可调；在所述芯轴1外依次套接有所述内电极2、样品层3和外电极4，所述内电极2、样品层3和外电极4的两端设置有紧固结构；所述内电极引线6a一端和所述内电极2连接。介质试样安装在同轴型电容器中。同轴型电容器的内电极采用保护电极型的结构，以消除边缘效应的影响。有效电极的长度可变，使得放入试样有介质和移走试样无介质两种情况下的电容量基本相同。于是通过测量有效电极改变的长度及相关计算，即可实现样品介电特性的测定。
The invention relates to an instrument, method and application for accurately measuring the dielectric properties of sample materials. The device comprises a mandrel 1, an inner electrode 2, a sample layer 3, an outer electrode 4, an insulating gasket 5, an inner electrode lead 6a and a guard electrode lead 6b, 6c, and the length of the inner electrode 2 is adjustable; The inner electrode 2, the sample layer 3 and the outer electrode 4 are sequentially sleeved on the outside of 1, and the two ends of the inner electrode 2, the sample layer 3 and the outer electrode 4 are provided with fastening structures; one end of the inner electrode lead wire 6a and The internal electrodes 2 are connected. The dielectric sample is installed in a coaxial type capacitor. The inner electrode of the coaxial capacitor adopts the structure of the guard electrode type to eliminate the influence of the edge effect. The length of the effective electrode is variable, so that the capacitance is basically the same when the sample is placed with a medium and when the sample is removed without a medium. Therefore, by measuring the length of the effective electrode change and related calculations, the determination of the dielectric properties of the sample can be realized.
Description
Technical field:
The invention belongs to in the electrical measurement field to the measurement of dielectric property, relate in particular to a kind of instrument and methods and applications of accurate working sample dielectric material characteristic.
Background technology:
The dielectric property of insulating material has significant values for the application of material.Industrial, the dielectric loss value component in the dielectric property causes energy loss, even device damage.At the exact instrument manufacture view, the accurate data of dielectric property are also very important for the performance of instrument, sometimes or even critical.Therefore, developed the method for many measurement dielectric properties for many years.But these methods also have the some shortcomings part at present:
1. can only measure plate shaped sample usually, and the size of sample is had requirement, sample area can not be too little.The dielectric property of material is along with place, batch difference of dispatching from the factory of producing this material can change.Accurate in order to guarantee measurement result, generally need to take a sample from the same batch of material of practical application.Sometimes, the material of practical application is less cylindrical bar, is difficult to cut down the planar shaped sample of enough sizes.And have not yet to see the instrument of the cylindrical or cylindrical shape sample dielectric property of direct measurement.
2. the existing basic ideas of measuring the dielectric property method are to make the air condenser of a plate-shaped electrode, measure the electric capacity of putting into and taking out plate shaped sample both of these case, calculate the dielectric property of sample more thus.The electric capacity of such air condenser generally only is several pF.And the problem that low capacitance measurement relates to is a lot.Measuring error is bigger, and particularly the connecting line between air condenser and the surveying instrument can also cause tangible error, and this error becomes along with the variation of measured capacitance amount.Therefore the method for above-mentioned measurement dielectric property has the defective of some principles.If can in measuring process, keep the measured capacitance amount constant, the process of measuring dielectric property will become a kind of alternative measurement, the error that the measuring error of measuring equipment itself and connecting line cause will be by cancellation in the process of twice measurement electric capacity, and the accuracy of measurement of dielectric property is also just along with improve.
Summary of the invention:
In order to overcome in the prior art sample shape size is had requirement and 2 big technical matterss of measuring error, the present invention has designed instrument and the dielectric property assay method that a kind of dielectric property is measured.
One of the present invention, a kind of device of working sample dielectric property is to realize like this
Described device comprises mandrel 1, interior electrode 2, sample layer 3, external electrode 4, insulating washer 5, internal electrode lead-wire (6a) and guard electrode lead-in wire (6b, 6c), described interior electrode 2 adjustable length;
Outside described mandrel 1, be socketed with successively described in electrode 2, sample layer 3 and external electrode 4, described in the two ends of electrode 2, sample layer 3 and external electrode 4 be provided with fastening structure; Described internal electrode lead-wire 6a one end is connected with described interior electrode 2;
By adjust described in the length of electrode 2, it is identical to be used for when described sample layer 3 is put into different medium and measured electric capacity.
In order to solve problem in the prior art, adopt the measured substitution method of measurement.By measuring length and the correlation computations that active electrode changes, can realize the mensuration of example dielectric characteristic.Electrode comprises active electrode part and guard electrode part in described, and described guard electrode partly is arranged on the two ends of active electrode part, and is provided with described insulating washer 5 in the middle of active electrode part and guard electrode part; The adjustable positions of described insulating washer 5, described interior electrode is by the length of the position adjustments active electrode of adjusting insulating washer 5, and then the length of regulating interior electrode 2.
In order to solve the technical matters that need make requirement to sample shape and size in the prior art, the present invention has adopted hollow coaxial type capacitor, can directly measure the dielectric property of cylindrical shape sample.Be that described mandrel 1 is hollow teflon mandrel, the material of described interior electrode 2 and external electrode 4 is a brass, and 3 sample is polytetrafluoroethylmaterial material and air in the described sample layer.
The present invention's two, a kind of device that utilizes the said determination example dielectric characteristic carries out method for measuring and is achieved in that
Described method adopts the measured substitution method of measurement, and described electrode length can be adjusted; Promptly, realize the mensuration of example dielectric characteristic by measuring length and the calculating that described active electrode partly changes; This method is used for when the dielectric property of measuring samples, reduces the poor of capacitance value that medium and two kinds of situations of no medium are arranged, takes a kind of method of alternative measurement.
In concrete method, in the described measured substitution method of measurement,
A, measured medium are non-air dielectrics, promptly put into measured medium
By the length that described interior electrode is regulated in the position of regulating insulating washer, make that the axial length of described active electrode part is l
1, the electric capacity C of calculating ganged condenser
1
B, measured medium are air dielectrics, and promptly sample layer is an air
By the length that described interior electrode is regulated in the position of regulating insulating washer, make that the axial length of described active electrode part is l
2, the electric capacity C of calculating ganged condenser
2
C, the dielectric property of mensuration measured medium
Because by the length of electrode in adjusting, the electric capacity of twice measurement is identical: C
1=C
2, accurately calculate the dielectric property ε of measured medium
r
The present invention's three, a kind ofly utilize the application of the assay method of said determination example dielectric characteristic to be:
Owing to adopted above-mentioned technical scheme, the present invention has broken through the limitation that can only measure plate shaped sample of the prior art for the shape of sample and size requirements, and this method both can be used to measure the dielectric property of cylindrical shape sample, also can measure the dielectric property to plate shaped sample.
Adopt technology contents of the present invention that sample is carried out the mensuration of dielectric property, principal feature is as follows:
1. adopt the measured substitution method of measurement.By measuring length and the correlation computations that active electrode changes, can realize the mensuration of example dielectric characteristic.
2. make hollow coaxial type capacitor, can directly measure the dielectric property of cylindrical shape sample;
3. solved the accurate problem of measuring of dielectric property of little capacitance (in the 10pF); The air condenser that can be generalized to plate-shaped electrode uses in measuring.
Measure a variable-length that characteristics are active electrodes of the coaxial type capacitor of cylindrical shape sample, make that the electric capacity of putting into sample and removing under two kinds of situations of sample is basic identical.Become a kind of process of measured alternative measurement like this with regard to the measurement that makes twice electric capacity.Electric capacity is measured the measuring error of instrument itself and error that connecting line causes can be by cancellation in measuring the process of electric capacity for twice, and the accuracy of measurement of dielectric property also thereby raising.To count different these factors of active electrode length when measuring for twice when certainly, calculating the dielectric property of sample.Interior electrode assembly is whole to be enclosed within on the mandrel of a teflon, makes disassembly process become easy.Mandrel is a hollow, and three connecting lines of electrode are drawn in being convenient to.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned embodiment of the present invention, therefore previously described mode is preferably, and does not have restrictive meaning.
Description of drawings:
Fig. 1 is the coaxial type capacitor among the present invention, loads onto the status architecture diagrammatic cross-section after the media samples;
Fig. 2 is the coaxial type capacitor among the present invention, the status architecture diagrammatic cross-section when being medium with the air.
Below in conjunction with embodiment above-mentioned each width of cloth accompanying drawing of the present invention is described in further detail.
Embodiment:
Fig. 1 is the coaxial type capacitor among the present invention, loads onto the status architecture diagrammatic cross-section after the media samples;
Fig. 2 is the coaxial type capacitor among the present invention, the status architecture diagrammatic cross-section when being medium with the air.Sample takes out.And by electrode length and insulating mat position in adjusting, electrode length increases about one times in making.The capacitance that takes out under the two kinds of situations in sample front and back is equal substantially.Profile line is
Material be teflon, profile line is
Material be brass.
Described device comprises mandrel 1, interior electrode 2, sample layer 3, external electrode 4, insulating washer, internal electrode lead-wire (6a) and guard electrode lead-in wire (6b, 6c), described interior electrode 2 adjustable length;
Outside described mandrel 1, be socketed with successively described in electrode 2, sample layer 3 and external electrode 4, described in the two ends of electrode 2, sample layer 3 and external electrode 4 be provided with fastening structure; Described internal electrode lead-wire 6a one end is connected with described interior electrode 2;
By adjust described in the length of electrode 2, it is identical to be used for when described sample layer 3 is put into different medium and measured electric capacity.
Electrode 2 comprises effective electrode part branch and guard electrode part in described.Active electrode partly is interior electrode A and interior electrode B, and described guard electrode partly comprises equivalent potential screen ring a and equivalent potential screen ring b.Described equivalent potential screen ring a and equivalent potential screen ring b are separately positioned on the two ends of active electrode part, and are provided with described insulating washer 5 in the middle of active electrode part and guard electrode part; The adjustable positions of described insulating washer 5, described interior electrode 2 is by the length of the position adjustments active electrode of adjusting insulating washer 5, and then the length of regulating interior electrode 2.
In the middle of described inner electrode layer and mandrel, also include a polytetrafluoroethylene floor 7, play insulating effect.And comprise an interior electrode contact ring 8 at this layer 7, be used for drawing internal electrode lead-wire 6a from interior electrode 2.
Described mandrel 1 each outer layer is socketed in mandrel 1 outside, and in addition fastening operation of fastening nut 9 is passed through in the back.
Dielectric property with polytetrafluoroethylmaterial material is measured as example.Drawn among Fig. 1 and Fig. 2 and can be fit to the coaxial type capacitor of cylindrical shape sample.Measure respectively and put into sample and to remove the dielectric property that electric capacity under two kinds of situations of sample just can be obtained sample.The interior electrode of coaxial type capacitor adopts the guard electrode structure of Kelvin's formula.Center section is the active electrode part, and this is a long 23mm, external diameter 20mm, the brass barrel of thick 2mm.The guard electrode part is equipped with at two ends, also is brass barrel, and external diameter is the same with active electrode with thickness, but length has only 14mm.Respectively there is a guard electrode (two sections copper rings of a, b among Fig. 1) at the two ends of active electrode part, and the three is enclosed within one and thoroughly does away with on the teflon mandrel of edge.The thick thin layer insulation spacer of 0.1mm is arranged between active electrode and the guard electrode each other, guarantee insulation each other.Active electrode and guard electrode are in same current potential (earth potential) in measuring process, so just formed the guard electrode structure of Kelvin's formula.The non-uniform electric field that this Kelvin's formula guard electrode structure makes edge effect cause only appears at the guard electrode place, and the electric field of active electrode part then is evenly distributed.Have only the lead-in wire 6a that partly links to each other with active electrode to receive zero indicator during measurement, with the guard electrode then ground connection of 6b and 6c that goes between accordingly.Therefore have only with the corresponding capacitance current of active electrode the balance of measuring bridge is had effect.The corresponding capacitance current of electric field distortion that causes with edge effect only is present in the guard electrode part, flows directly in the ground, does not influence measuring process.Therefore Kelvin's formula guard electrode structure can be eliminated the influence of edge effect to measuring process.Interior electrode assembly is whole to be enclosed within on the mandrel of a teflon, makes disassembly process become easy.Mandrel is a hollow, and three connecting lines of electrode are drawn in being convenient to.
For feasible no medium is approaching identical with the capacitance under two kinds of situations of medium are arranged, the variable-length of the active electrode part of this kind coaxial type capacitor.In order to accomplish this point, actual active electrode partly has been divided into two sections of interior electrode A and interior electrode B.Can be by the order of electrode B section and insulation spacer in the transposing; the electrode B section directly contacts a part of (see figure 1) that becomes the guard electrode part with interior electrode A section insulation with equivalent potential screen ring b section in making; thereby in adjusting, in the electrode effective length, kept the length of whole device constant.
The active electrode outside is overlapped " high-field electrode ", i.e. an external electrode again.This also is a brass barrel.Internal diameter 26mm, thick 2mm.Both keep coaxial active electrode and " high-field electrode ", and promptly both have same axis.The gap that 3mm is arranged between active electrode and the external electrode.When this gap was the clearance, external electrode, active electrode part and two guard electrode parts had just formed one " ganged condenser " together.
First kind of situation: do not have medium, promptly electric capacity is air condenser
If effectively the axial length of electrode is l
1, external diameter is r, and the gap between active electrode and " high-field electrode " is δ, and then the electric capacity of ganged condenser is
Second kind of situation: put into measured medium
The cylindrical shape sample of a polytetrafluoroethylmaterial material on interior electrode jacket.The external diameter of electrode in the internal diameter of sample just in time equals.The thickness of sample cylinder equals the gap delta of original internal and external electrode.。And then put original external electrode-" high-field electrode " in cylindrical shape teflon sample outside.So just constituted a coaxial type capacitor again.Basic identical when making capacitance and first kind of situation, the length of electrode in must suitably adjusting.If electrode length is l in this moment
2
Then electric capacity from (1) formula become for
ε wherein
rBe the relative dielectric constant of measured material teflon sample, just the in-phase component of sample medium characteristic.
For the measurement that makes twice electric capacity becomes a kind of process of alternative measurement, should make the electric capacity of putting into sample and removing under two kinds of situations of sample basic identical.Can make electric capacity measure the measuring error of instrument itself like this and error that connecting line causes can be by cancellation in the process of twice measurement electric capacity, the accuracy of measurement of dielectric property is also just along with improve.Make C as can be known from (1) and (2) formula
1And C
2The condition that equates is
l
1＝ε
rl
2 (3)
Or
In other words, when measuring for the second time, the length of active electrode part should shorten to 1/ ε
r, so just can reach and make C
1And C
2The condition that equates.For example, the relative dielectric constant that checks in the teflon sample from document is about 2.0, so when measuring for the second time, the length of active electrode part should shorten to original half.If specific inductive capacity is not just in time to equal 2.0, the effective length of electrode can be adjusted.For example do some diameters conductive foil identical with active electrode, connect together with half of active electrode, just adjusted the variable quantity of active electrode length in twice measuring process, thereby adapt to specific inductive capacity and be not equal to 2.0 situation, make that the electric capacity of twice measurement is still very approaching, satisfy substituting Testing requirement.
Table 1 is for respectively having carried out 20 time measurement result to cylindrical teflon sample in the situation that medium is arranged and do not have a medium with Fig. 1,2 shown devices.Provided dielectric loss measurement value mean value, standard deviation and residual error under medium and two kinds of situations of no medium simultaneously, the data from table as can be seen.Therefore all residual errors can think that these data all are effective all less than 3 σ.
| Table 1 PTFE medium loss measurement result | |||||
| Sequence number | Medium C is arranged X1＝10.11510pF | No medium C X2＝10.02707pF | tanδ(×10 -7) | ||
| Measurement result tan δ 1(×10 -7) | Residual error v 1(×10 -7) | Measurement result tan δ 2(×10 -7) | Residual error v 2(×10 -7) | tanδ 1-tanδ 2(×10 -7) | |
| 1 | 2114 | 280.3 | 1058 | 92.45 | 1056 |
| 2 | 2002 | 168.3 | 547 | -418.55 | 1455 |
| 3 | 1608 | -225.7 | 422 | -543.55 | 1186 |
| 4 | 1311 | -522.7 | 497 | -468.55 | 814 |
| 5 | 1712 | -121.7 | 1398 | 432.45 | 314 |
| 6 | 1436 | -397.7 | 784 | -181.55 | 652 |
| 7 | 1687 | -146.7 | 842 | -123.55 | 845 |
| 8 | 2245 | 411.3 | 1356 | 390.45 | 889 |
| 9 | 1388 | -445.7 | 1079 | 113.45 | 309 |
| 10 | 2195 | 361.3 | 990 | 24.45 | 1205 |
| 11 | 2300 | 466.3 | 894 | -71.55 | 1406 |
| 12 | 2146 | 312.3 | 909 | -56.55 | 1237 |
| 13 | 1394 | -439.7 | 1221 | 255.45 | 173 |
| 14 | 1178 | -655.7 | 622 | -343.55 | 556 |
| 15 | 1780 | -53.7 | 1564 | 598.45 | 216 |
| 16 | 2057 | 223.3 | 974 | 8.45 | 1083 |
| 17 | 2324 | 490.3 | 1466 | 500.45 | 858 |
| 18 | 2198 | 364.3 | 1258 | 292.45 | 940 |
| 19 | 1101 | -732.7 | 739 | -226.55 | 362 |
| 20 | 2498 | 664.3 | 691 | -274.55 | 1807 |
| Mean value | 1833.7 | / | 965.55 | / | 868.15 |
| Standard deviation | 427.1167 | / | 333.4325 | / | 101.1108 |
Annotate: 1. tan δ in showing
1With tan δ
2Standard deviation, be the standard deviation of single measurement, try to achieve by the Bezier formula
2. the standard deviation of tan δ is meant standard error of the mean in the table.
Claims (6)
1. the device of a working sample dielectric property, it is characterized in that: described device comprises mandrel (1), interior electrode (2), sample layer (3), external electrode (4), insulating washer (5), internal electrode lead-wire (6a) and guard electrode lead-in wire (6b, 6c), described interior electrode (2) adjustable length;
Outside described mandrel (1), be socketed with successively described in electrode (2), sample layer (3) and external electrode (4), described in the two ends of electrode (2), sample layer (3) and external electrode (4) be provided with fastening structure; Described internal electrode lead-wire (6a) end is connected with described interior electrode (2);
This device be used for by adjust described in the length of electrode (2), electric capacity is identical when making described sample layer (3) put into different medium to measure.
2. the device of a kind of working sample dielectric property according to claim 1, it is characterized in that: electrode (2) comprises effective electrode part branch and guard electrode part in described, described guard electrode partly is arranged on the two ends of active electrode part, and is provided with described insulating washer (5) in the middle of active electrode part and guard electrode part; The adjustable positions of described insulating washer (5), described interior electrode (2) is by the length of the position adjustments active electrode of adjusting insulating washer (5), and then the length of regulating interior electrode.
3. according to the device of claim 1 and 2 described a kind of working sample dielectric properties, it is characterized in that: described mandrel (1) is a hollow teflon mandrel, and the material of described interior electrode (2) and external electrode (4) is a brass.
4. use the method according to a kind of working sample dielectric property of the described a kind of working sample dielectric property device of one of claim 1-3, it is characterized in that: described method adopts the measured substitution method of measurement, and described electrode length can be adjusted; Promptly, realize the mensuration of example dielectric characteristic by measuring the length that described active electrode partly changes and calculating; This method is used for when the dielectric property of measuring samples, reduces the poor of capacitance value that medium and two kinds of situations of no medium are arranged, takes a kind of method of alternative measurement.
5. the method for a kind of working sample dielectric property according to claim 4 is characterized in that: in the described measured substitution method of measurement,
A, measured medium are non-air dielectrics, promptly put into measured medium
By the length that described interior electrode is regulated in the position of regulating insulating washer, make that the axial length of described active electrode part is l
1, the electric capacity C of calculating ganged condenser
1
B, measured medium are air dielectrics, and promptly sample layer is an air
By the length that described interior electrode is regulated in the position of regulating insulating washer, make that the axial length of described active electrode part is l
2, the electric capacity C of calculating ganged condenser
2
C, the dielectric property of mensuration measured medium
Because by the length of electrode in adjusting, the electric capacity of twice measurement is identical: C
1=C
2, accurately calculate the dielectric property ε of measured medium
r
6. according to the application of the method for the described a kind of working sample dielectric property of one of claim 4-5, it is characterized in that: described method is used to measure the dielectric property of cylindrical shape sample and the dielectric property of plate shaped sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101789077A CN100538374C (en) | 2007-12-07 | 2007-12-07 | A kind of device of working sample dielectric property and assay method thereof and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101789077A CN100538374C (en) | 2007-12-07 | 2007-12-07 | A kind of device of working sample dielectric property and assay method thereof and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101183125A true CN101183125A (en) | 2008-05-21 |
| CN100538374C CN100538374C (en) | 2009-09-09 |
Family
ID=39448465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101789077A Expired - Fee Related CN100538374C (en) | 2007-12-07 | 2007-12-07 | A kind of device of working sample dielectric property and assay method thereof and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100538374C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565535A (en) * | 2012-03-07 | 2012-07-11 | 德州学院 | Experimental instrument for resistivity and dielectric constant of biological tissue |
| CN103197181A (en) * | 2013-03-27 | 2013-07-10 | 中国计量科学研究院 | Shielding electrode model assembly and application thereof |
| CN103207288A (en) * | 2013-03-27 | 2013-07-17 | 中国计量科学研究院 | Solid electric compensation auxiliary electrode and application thereof |
| CN107621490A (en) * | 2017-09-28 | 2018-01-23 | 青岛农业大学 | A kind of grain water content measuring method |
| CN108181357A (en) * | 2018-01-30 | 2018-06-19 | 天津大学 | Vertical eddy flow split-phase capacitor integral type water-containing measuring instrument |
| CN109581159A (en) * | 2018-11-30 | 2019-04-05 | 华北电力大学 | A kind of insulating liquid liquid, gaseous state and gas-liquid mixed state dielectric property test chamber |
-
2007
- 2007-12-07 CN CNB2007101789077A patent/CN100538374C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565535A (en) * | 2012-03-07 | 2012-07-11 | 德州学院 | Experimental instrument for resistivity and dielectric constant of biological tissue |
| CN103197181A (en) * | 2013-03-27 | 2013-07-10 | 中国计量科学研究院 | Shielding electrode model assembly and application thereof |
| CN103207288A (en) * | 2013-03-27 | 2013-07-17 | 中国计量科学研究院 | Solid electric compensation auxiliary electrode and application thereof |
| CN103197181B (en) * | 2013-03-27 | 2015-12-23 | 中国计量科学研究院 | A kind of guarded electrode model component and application thereof |
| CN107621490A (en) * | 2017-09-28 | 2018-01-23 | 青岛农业大学 | A kind of grain water content measuring method |
| CN108181357A (en) * | 2018-01-30 | 2018-06-19 | 天津大学 | Vertical eddy flow split-phase capacitor integral type water-containing measuring instrument |
| CN109581159A (en) * | 2018-11-30 | 2019-04-05 | 华北电力大学 | A kind of insulating liquid liquid, gaseous state and gas-liquid mixed state dielectric property test chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100538374C (en) | 2009-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101183125A (en) | A device for measuring the dielectric properties of samples, its measuring method and application | |
| CN102798766B (en) | Method for testing microwave dielectric property of high-loss dielectric substance | |
| CN110108949A (en) | For measuring the novel microwave sensor of magnetic media material dielectric constant and magnetic conductivity | |
| US20140111224A1 (en) | Probe | |
| CN105353223A (en) | Capacitor coupling noncontact conductance measurement device and method | |
| CN100498198C (en) | Coaxial component center deviation measuring apparatus | |
| CN110133377A (en) | Differential Microwave Sensors for Measuring Permittivity and Permeability of Magnetic Media Materials | |
| CN114966329A (en) | Partial discharge insulation defect integrated detection sensor | |
| CN115494294A (en) | Non-contact high-voltage measuring device with self-checking capability and measuring method thereof | |
| JP3329555B2 (en) | Impedance meter | |
| CN108519261B (en) | Method for testing dielectric property of semiconductive material based on sandwich structure | |
| CN103940493B (en) | A new capacitive liquid level sensor based on the principle of computational capacitance and its application | |
| CN104133116B (en) | Relative dielectric constant testing method based on principle of capacitance calculation | |
| Raicu | A simple theoretical and practical approach to measuring dielectric properties with an open-ended coaxial probe | |
| CN103983858A (en) | High-precision broadband measurement method for dielectric property of low-loss material | |
| CN201130702Y (en) | 7 millimeters plane joint microwave coaxial matched load | |
| CN114878943B (en) | A method for evaluating and ensuring the low-frequency performance of D-dot probes | |
| CN201181327Y (en) | High Voltage Standard Dissipator | |
| CN109001500B (en) | Radio frequency device test probe of embedded inductance | |
| CN111398693A (en) | Method for measuring ESR (equivalent series resistance) and Q (Q) value of vacuum capacitor based on S-parameter network analyzer | |
| CN115552255A (en) | Circumferentially evenly distributed magnetic field sensor device for measuring the magnetic field of a current conductor | |
| Hao et al. | Non‐contact method to reduce contact problems between sample and electrode in dielectric measurements | |
| CN202033398U (en) | High-voltage bleeder with high impedance and high temperature stability | |
| CN111141965B (en) | Electrostatic field measuring circuit using field effect transistor | |
| US20090098668A1 (en) | Method and Apparatus to Facilitate Testing of Printed Semiconductor Devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20121207 |