JPH074600Y2 - Wideband measurement cell - Google Patents
Wideband measurement cellInfo
- Publication number
- JPH074600Y2 JPH074600Y2 JP10069888U JP10069888U JPH074600Y2 JP H074600 Y2 JPH074600 Y2 JP H074600Y2 JP 10069888 U JP10069888 U JP 10069888U JP 10069888 U JP10069888 U JP 10069888U JP H074600 Y2 JPH074600 Y2 JP H074600Y2
- Authority
- JP
- Japan
- Prior art keywords
- cell
- measuring
- coaxial cable
- conductor
- sample
- 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.)
- Expired - Lifetime
Links
Landscapes
- Measuring Magnetic Variables (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
【考案の詳細な説明】 −産業上の利用分野− 本考案は、マイクロ波によって物質の複素誘電率等を測
定するための広帯域測定用セルに関する。DETAILED DESCRIPTION OF THE INVENTION -Industrial field- The present invention relates to a broadband measuring cell for measuring the complex dielectric constant of a substance by microwaves.
−考案の背景− マイクロ波による物質の性状測定は、例えば特開昭62-2
26051号公報に示されているように、同軸管または導波
管の導体で囲まれた空間に試料を置き、入射信号と反射
信号の強度と位相の変化から試料の複素誘電率、複素導
電率、複素透磁率等の高周波特性を測定することにより
行なう。即ち、第２図は従来の広帯域測定装置の一例を
示し、同軸ケーブルＡは中心導体a1と外被導体a2とを備
えるもので、同軸ケーブルＡの一端には発信器Ｂからマ
イクロ波電圧が印加されると共に、その反射電圧の振幅
と位相を測定できる測定器Ｃが接続される。そして、同
軸ケーブルＡの他端には、周囲のプラグ外被導体d1を前
記外被導体a2にかつ中心パイプd2を前記中心導体a1に結
合された接続プラグＤが固定され、この接続プラグＤの
ねじ部d3には内部に粉末または液状の試料を収容できる
測定用セルＥが接続される。つまり、この測定用セルＥ
は、試料を収容できるカップ状の外被導体e1と、この外
被導体e1の内側に先端を突起させた状態で絶縁体e2を介
して外被導体e1の中心部に支持される貫通したピンe3と
を備えるもので、外被導体e1はプラグ外被導体d1にかつ
ピンe3は前記中心パイプd2にそれぞれ電気的に導通状態
におくための接続ジャック構造となっている。-Background of the Invention-Measurement of the properties of substances by microwaves is described in, for example, JP-A-62-2
As shown in Japanese Patent No. 26051, a sample is placed in a space surrounded by a conductor of a coaxial tube or a waveguide, and the complex permittivity and the complex conductivity of the sample are determined from changes in intensity and phase of an incident signal and a reflected signal. , By measuring high frequency characteristics such as complex permeability. That is, FIG. 2 shows an example of a conventional wideband measuring apparatus, in which a coaxial cable A is provided with a center conductor a 1 and a jacket conductor a 2, and one end of the coaxial cable A has a microwave voltage from a transmitter B. Is applied, and a measuring instrument C capable of measuring the amplitude and phase of the reflected voltage is connected. Then, at the other end of the coaxial cable A, a connection plug D is fixed, in which a surrounding plug outer conductor d 1 is connected to the outer conductor a 2 and a central pipe d 2 is connected to the central conductor a 1. A measuring cell E capable of accommodating a powder or liquid sample is connected to the threaded portion d 3 of the connection plug D. That is, this measuring cell E
Includes a jacket conductor e 1 cup-shaped to accommodate the sample, are supported in the center of the enveloping conductor e 1 via the insulator e 2 in a condition in which the outer to the inner of the conductor e 1 the tip is projecting With a penetrating pin e 3 passing therethrough, wherein the jacket conductor e 1 is connected to the plug jacket conductor d 1 and the pin e 3 is electrically connected to the central pipe d 2 , respectively. Has become.
−考案が解決しようとする課題− しかしながら、このような広帯域測定装置においては、
同軸ケーブルＡの中心導体a1は接続プラグＤの中心パイ
プd2を介して測定用セルＥのピンe3に電気的に導通状態
におかれ、また、同軸ケーブルＡの外被導体a2はプラグ
本体d1を介してセル本体e1に導通状態におかれるので、
これらの接続部分からの反射波があるため、セルに挿入
した試料からの反射が微弱である場合には測定精度が低
下するという欠点があった。-Problems to be solved by the invention-However, in such a wide band measuring device,
The center conductor a 1 of the coaxial cable A is electrically connected to the pin e 3 of the measuring cell E through the center pipe d 2 of the connection plug D, and the outer conductor a 2 of the coaxial cable A is Since it is placed in a conductive state with the cell body e 1 via the plug body d 1 ,
Since there is a reflected wave from these connecting portions, there is a drawback that the measurement accuracy is lowered when the reflection from the sample inserted in the cell is weak.
本考案の目的は、以上に述べたようなマイクロ波を利用
した従来の広帯域測定装置の問題に鑑み、コネクターを
使用せずに、送・受信系の適正なインピーダンス整合が
得られる広帯域測定用セル装置を得るにある。The object of the present invention is, in view of the problems of the conventional wideband measurement apparatus using microwaves as described above, a wideband measurement cell which can obtain an appropriate impedance matching of a transmission / reception system without using a connector. To get the equipment.
−課題を解決するための手段− この目的を達成するため、本考案は、電圧が印加される
同軸ケーブルの一端に接続されるセルの内部に試料を入
れ、同セルからの反射信号を計測することにより該試料
の電気的特性を測定する装置において、同軸ケーブルの
一端に該同軸ケーブルの外被及び内部誘電体により前記
セルを構成し、同軸ケーブルの中心導体を内部誘電体よ
り突出させかっつ外被導体から突出させない状態で同セ
ルの基部を構成することを提案するものである。-Means for solving the problem-To achieve this object, the present invention puts a sample inside a cell connected to one end of a coaxial cable to which a voltage is applied, and measures a reflection signal from the cell. In the device for measuring the electrical characteristics of the sample, the cell is constituted by the jacket and the internal dielectric of the coaxial cable at one end of the coaxial cable, and the center conductor of the coaxial cable is projected from the internal dielectric. It is proposed that the base portion of the same cell is configured so as not to project from the outer conductor.
−実施例− 以下、第１図について本考案の実施例の詳細を説明す
る。-Embodiment- Hereinafter, the embodiment of the present invention will be described in detail with reference to FIG.
本考案で用いるセミリジット同軸ケーブル１は、周囲の
浮遊容量や磁界の影響を阻止するため、中心導体1aの周
囲に絶縁体1bを介して金属パイプからなる外被導体1cを
有する周知の構造のもので、その一端には、発信器２か
らマイクロ波電圧が印加されると共に、その反射電圧の
振幅と位相を測定できる測定器３が接続される点では、
従来と同様である。The semi-rigid coaxial cable 1 used in the present invention has a well-known structure in which the outer conductor 1c made of a metal pipe is provided around the center conductor 1a via the insulator 1b in order to prevent the influence of stray capacitance and magnetic field in the surroundings. Then, at one end, a microwave voltage is applied from the oscillator 2 and a measuring device 3 capable of measuring the amplitude and phase of the reflected voltage is connected.
It is the same as the conventional one.
図示実施例の場合、セミリジット同軸ケーブル１の他端
は中心導体1bの一部を切削等の処理をほどこすことによ
って試料を収容できる上方を開放された測定用セル４を
形成する。図示実施例は、以上のような構造であるか
ら、測定用セル４に試料を入れ、発信器２からの信号を
同軸ケーブル１を介して外被導体1cと中心導体1aの先端
との間の試料に印加し、試料による反射波の強度や位相
等を測定器３により測定することにより、試料の性状を
求めることになる。この測定の場合、測定用セル４は同
軸ケーブル１の外被導体1cと中心導体1aで構成されてい
るので、接続部が無く、従って不要な反射が発生しない
ため、精度の高い測定が可能になる。In the case of the illustrated embodiment, the other end of the semi-rigid coaxial cable 1 forms a measurement cell 4 having an open upper portion capable of accommodating a sample by subjecting a part of the central conductor 1b to a treatment such as cutting. Since the illustrated embodiment has the above-described structure, the sample is put in the measuring cell 4 and the signal from the oscillator 2 is transmitted between the outer conductor 1c and the tip of the central conductor 1a via the coaxial cable 1. The properties of the sample are obtained by applying the voltage to the sample and measuring the intensity, phase, etc. of the reflected wave from the sample with the measuring device 3. In this measurement, since the measuring cell 4 is composed of the outer conductor 1c and the center conductor 1a of the coaxial cable 1, there is no connecting portion and therefore unnecessary reflection does not occur, so that highly accurate measurement is possible. Become.
−考案の効果− 以上の説明から明らかなように、本考案によれば、測定
用セルと送・受信系のインピーダンスを容易に整合でき
る有利な広帯域測定用セル得ることができる。-Effects of the Invention-As is clear from the above description, according to the present invention, it is possible to obtain an advantageous wideband measurement cell in which the impedances of the measurement cell and the transmission / reception system can be easily matched.
第１図は一部を破断して示す本考案による広帯域測定用
セルの説明図、第２図は一部を破断して示す従来の広帯
域測定用セルの説明図である。 １……同軸ケーブル、1a……中心導体、1c……外被導
体、1b……絶縁体、２……発信器、３……測定器、４…
…測定用セル、FIG. 1 is a partially cutaway view of a wideband measurement cell according to the present invention, and FIG. 2 is a partially cutaway view of a conventional wideband measurement cell. 1 ... Coaxial cable, 1a ... Center conductor, 1c ... Outer conductor, 1b ... Insulator, 2 ... Transmitter, 3 ... Measuring instrument, 4 ...
... measuring cell,
Claims (1)
続されるセルの内部に試料を入れ、同セルからの反射信
号を計測することにより該試料の電気的特性を測定する
装置において、同軸ケーブルの一端に該同軸ケーブルの
外被及び内部誘電体により前記セルを構成し、同軸ケー
ブルの中心導体を内部誘電体より突出させかっつ外被導
体から突出させない状態で同セルの基部を構成すること
を特徴とする広帯域測定用セル。1. An apparatus for measuring an electrical characteristic of a sample by placing a sample inside a cell connected to one end of a coaxial cable to which a voltage is applied and measuring a reflected signal from the cell. The cell is formed by the outer sheath and the inner dielectric of the coaxial cable at one end of the cable, and the base of the cell is formed in a state where the center conductor of the coaxial cable is projected from the inner dielectric and is not projected from the outer conductor. A broadband measuring cell characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10069888U JPH074600Y2 (en) | 1988-07-29 | 1988-07-29 | Wideband measurement cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10069888U JPH074600Y2 (en) | 1988-07-29 | 1988-07-29 | Wideband measurement cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0221571U JPH0221571U (en) | 1990-02-13 |
| JPH074600Y2 true JPH074600Y2 (en) | 1995-02-01 |
Family
ID=31329007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10069888U Expired - Lifetime JPH074600Y2 (en) | 1988-07-29 | 1988-07-29 | Wideband measurement cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074600Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4265206B2 (en) * | 2002-11-27 | 2009-05-20 | 株式会社 東北テクノアーチ | Non-contact conductivity measurement system |
| JP4707957B2 (en) * | 2004-02-12 | 2011-06-22 | 阪和電子工業株式会社 | Waveform observation device |
| JP4561887B2 (en) * | 2008-06-30 | 2010-10-13 | Ｔｄｋ株式会社 | Impedance measurement method |
| JP6504504B2 (en) * | 2015-11-06 | 2019-04-24 | 日野自動車株式会社 | Oil physical property sensor |
-
1988
- 1988-07-29 JP JP10069888U patent/JPH074600Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0221571U (en) | 1990-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5227730A (en) | Microwave needle dielectric sensors | |
| Stuchly et al. | Equivalent circuit of an open-ended coaxial line in a lossy dielectric | |
| US4829233A (en) | Microwave probe | |
| US5867020A (en) | Capacitively coupled RF voltage probe having optimized flux linkage | |
| JP3172690B2 (en) | Connection device between measuring device and test lead | |
| GB1405003A (en) | Apparatus for measuring the levels of fluids and the dielectric constants of the same | |
| CA1204160A (en) | Method and apparatus for measuring the surface transfer impedance of a piece of shielded cable | |
| JPH074600Y2 (en) | Wideband measurement cell | |
| US4795989A (en) | MMW microstrip coupler having movable test probe | |
| US4656870A (en) | Ultrasonic testing device | |
| US6201400B1 (en) | Bulls-eye mid-frequency impedance probe | |
| US4814713A (en) | Coaxial test fixture for determining shielding effectiveness of a device against interfering electromagnetic fields | |
| CA2620334A1 (en) | Electric/magnetic field sensor | |
| JP6196191B2 (en) | measuring device | |
| US4931720A (en) | Arrangement for measuring transfer impedances of coaxial cables | |
| US20070079646A1 (en) | Sensor and assembly for hydrometric measurements | |
| CN106970344A (en) | A kind of method for reducing open circuit device calibrating device edge capacitance and open circuit device calibrating device | |
| US2760157A (en) | Radio frequency current detection and measuring devices | |
| US3372331A (en) | Gyromagnetic spectrometer having a tapered dielectric transition between a coaxial line and a helix structure | |
| US4287496A (en) | Assembly for positioning the coupling probe of a waveguide | |
| JP2001509599A (en) | Device for measuring and / or displaying electricity, magnetism and material properties derived therefrom | |
| JPH06100629B2 (en) | Magnetic field measurement probe | |
| US3693103A (en) | Wideband detector for use in coaxial transmission lines | |
| JPH03123871A (en) | Cell for measurement of wind range | |
| WO2023223541A1 (en) | Dielectric spectrometry device |