JPH0377454B2 - - Google Patents
Info
- Publication number
- JPH0377454B2 JPH0377454B2 JP62138016A JP13801687A JPH0377454B2 JP H0377454 B2 JPH0377454 B2 JP H0377454B2 JP 62138016 A JP62138016 A JP 62138016A JP 13801687 A JP13801687 A JP 13801687A JP H0377454 B2 JPH0377454 B2 JP H0377454B2
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- particles
- gas
- microphone
- high voltage
- 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
- 239000002245 particle Substances 0.000 claims description 28
- 230000005684 electric field Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000012798 spherical particle Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、気体中の非球形粒子の形状を電気
的に測定する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for electrically measuring the shape of non-spherical particles in a gas.
〔従来の技術及び問題点〕
気体中に含まれる粒子の形状を測定することは
公害防止等の観点からも意義がある。これまで、
気体粒子中に含まれる球状粒子の大きさをレーザ
ー流速計を用いて測定する装置が米国特許第
4633714号明細書に提案されている。ところが、
気体中に含まれる粒子には球状のもののみならず
アスベスト（石英）繊維片のように繊維状あるい
は円筒状のものがあり、これらについてもしばし
ば形状測定を行う必要性が生じている。ところ
が、従来、繊維状あるいは円筒状の粒子の形状
（直径、長さ）を測定する装置は提案されていな
かつた。[Prior Art and Problems] Measuring the shape of particles contained in gas is also significant from the perspective of pollution prevention. Until now,
A device that uses a laser anemometer to measure the size of spherical particles contained in gas particles has been awarded a U.S. patent.
It is proposed in the specification of No. 4633714. However,
Particles contained in gas include not only spherical particles but also fibrous or cylindrical particles such as asbestos (quartz) fiber pieces, and it is often necessary to measure the shape of these particles as well. However, no device has been proposed for measuring the shape (diameter, length) of fibrous or cylindrical particles.
本発明はこのような従来技術の実情に鑑みてな
されたもので、気体中の繊維状又は円筒状粒子の
形状を電気的にかつ連続的に測定し得る装置を提
供することを目的とする。
The present invention has been made in view of the actual state of the prior art, and an object of the present invention is to provide an apparatus that can electrically and continuously measure the shape of fibrous or cylindrical particles in gas.
本発明によれば、繊維状又は円筒状粒子を含む
試料ガスを清浄ガスで包んで吸入する内外二重管
よりなる試料導入管と、直管の内面に円周を等分
して多数の電極を集列した分析室と、吸引ポンプ
を順次連結するとともに、上記分析室側面にマイ
クロホンおよびこのマイクロホンに連なる波形解
析装置および粒子測定装置からなる検出機構を添
設し、さらに前記各電極を、これら電極中の対向
位置にある２個を常にこの一組に限つてそれぞれ
正極の高電圧、負極の高電圧を順次印加して粒子
に回転を与えるべき回転電場発生装置に接続して
なり、前記繊維状又は円筒状粒子の直径及び長さ
を求めることを特徴とする気体中の粒子の形状を
測定する装置が提供される。
According to the present invention, there is provided a sample introduction tube consisting of an inner and outer double tube for inhaling a sample gas containing fibrous or cylindrical particles wrapped in clean gas, and a large number of electrodes on the inner surface of the straight tube, the circumference of which is equally divided. A suction pump is sequentially connected to an analysis chamber in which the above-mentioned electrodes are arranged, and a detection mechanism consisting of a microphone and a waveform analysis device and a particle measurement device connected to the microphone is attached to the side of the analysis chamber. A set of two electrodes located at opposite positions in the electrodes are always connected to a rotating electric field generating device that applies a high voltage of the positive electrode and a high voltage of the negative electrode in sequence to give rotation to the particles, and the fibers are An apparatus for measuring the shape of particles in a gas is provided, which is characterized in that it determines the diameter and length of shaped or cylindrical particles.
この発明の実施例を図面について説明すると、
全体はそれぞれ直筒状の試料導入管１、分析室
４、吸引部７を前後端を順次つき合わせて配設す
るとともに、分析室４の外側面に検出機構９を付
設して形成されている。
An embodiment of this invention will be explained with reference to the drawings.
The whole is formed by arranging a straight cylindrical sample introduction tube 1, an analysis chamber 4, and a suction section 7 with their front and rear ends facing each other in this order, and a detection mechanism 9 attached to the outer surface of the analysis chamber 4.
試料導入管１は、試料ガスすなわち測定すべき
所要の粒子を含んだガスを送り込む内管２と、こ
の内管２を囲んで設けられた清浄ガスが通る外管
３とからなる二重管として作られている。 The sample introduction tube 1 is a double tube consisting of an inner tube 2 into which a sample gas, that is, a gas containing the required particles to be measured, is fed, and an outer tube 3 surrounding the inner tube 2 through which a clean gas passes. It is made.
分析室４は、直管内に多数個の棒状の電極５…
を円周等分位置に並列して円筒状に作られてお
り、内部を試料ガスが通過するようになつてい
る。これら電極は円筒中心を挾んで対向する２個
を正負一組とする複数組により形成され、別に設
けた回転電場発生装置６を介してこれら、複数組
の電極のうち、常にその任意の一組が電極の一方
に正極の高電圧、他の一方に負極の高電圧を印加
され、かつ回転電場発生装置６のセグメントとブ
ラシによる回転スイツチ機構の作動に応じて上記
印加が最初の一組の電極から隣接する次の一組の
電極に次々と変つて行くようになつている。 The analysis chamber 4 has a large number of rod-shaped electrodes 5 in a straight pipe.
are arranged in parallel at equal positions on the circumference and are made into a cylindrical shape, through which the sample gas passes. These electrodes are formed of a plurality of pairs, with two electrodes facing each other across the center of the cylinder, one positive and one negative, and a separately provided rotating electric field generator 6 is used to constantly generate one of these electrodes. A positive high voltage is applied to one of the electrodes, and a negative high voltage is applied to the other, and in response to the operation of the rotary switch mechanism by the segments and brushes of the rotating electric field generator 6, the above application is applied to the first set of electrodes. The electrodes change from one set of electrodes to the next set of adjacent electrodes one after another.
吸引部７は、分析室４の他端に接続された吸引
ポンプ８を備え、流量計、フイルターなどが付設
されている。 The suction section 7 includes a suction pump 8 connected to the other end of the analysis chamber 4, and is equipped with a flow meter, a filter, and the like.
検出機構９は、分析室４の側面に高感度のマイ
クロホン１０とこのマイクロホンに接続された波
形解析装置１１および粒子測定装置１２で構成さ
れている。 The detection mechanism 9 includes a highly sensitive microphone 10 on the side of the analysis chamber 4, a waveform analyzer 11 and a particle measuring device 12 connected to the microphone.
〔作用、効果〕
この発明は上記の構成であつて、試料導入管１
の内管２を測定ガスのダクトに接続し、吸引部７
を作動させると、吸引ポンプ８により内管２先端
および外管３の導管３′からそれぞれ測定ガスお
よび濾過した清浄ガスが吸引され、測定ガスはこ
の清浄ガスの引込作用により、強制的に吸引さ
れ、一直線の流れとなつて分析室４内に流入す
る。[Operations and Effects] The present invention has the above configuration, and the sample introduction tube 1
Connect the inner tube 2 of the
When activated, the suction pump 8 sucks the measurement gas and the filtered clean gas from the tip of the inner tube 2 and the conduit 3' of the outer tube 3, respectively, and the measurement gas is forcibly sucked by the drawing action of this clean gas. , flows into the analysis chamber 4 in a straight line.
分析室４では前記したように回転電場発生装置
６を介して対向する２個の電極５，５に正極の高
電圧ならびに負極の高電圧が印加されており、こ
の印加は次々と隣接する電極に移り変わつて行く
ようになつているため、清浄ガスに包まれて分析
室４に流入した測定ガス中の粒子は流入時、正負
極に形成されている電極に対して互に引き合うよ
うに分極するが、次の瞬間には電極の正負が隣接
する電極に変わるため、分極した粒子は上記隣接
電極につられて角度を変えていき、次に再び角度
を変えていき、こうして粒子が回転してその回転
運動エネルギーに応じて音波が発生する。この
際、発生する音波の強さは繊維状あるいは円筒状
粒子の直径と長さに比例する。したがつて、逆
に、音波の強さを測定することにより直径及び長
さを求めることができる。そこで、本発明では、
この音波をマイクロホン１０で捉え、波形解析装
置１２でその波形を解析することにより粒子の直
径及び長さを求めることを可能としたものであ
る。 In the analysis chamber 4, as described above, a high voltage of the positive electrode and a high voltage of the negative electrode are applied to the two opposing electrodes 5, 5 via the rotating electric field generator 6, and this application is applied to the adjacent electrodes one after another. Because the particles in the measurement gas are enveloped in clean gas and flow into the analysis chamber 4, when they flow in, they are polarized so that they attract each other to the electrodes formed on the positive and negative electrodes. However, in the next moment, the positive and negative sides of the electrode change to the adjacent electrode, so the polarized particle is pulled by the adjacent electrode and changes its angle, and then changes its angle again, and in this way the particle rotates and its polarized particle changes its angle. Sound waves are generated in response to rotational kinetic energy. At this time, the intensity of the generated sound waves is proportional to the diameter and length of the fibrous or cylindrical particles. Therefore, conversely, the diameter and length can be determined by measuring the intensity of the sound waves. Therefore, in the present invention,
By capturing this sound wave with a microphone 10 and analyzing its waveform with a waveform analyzer 12, it is possible to determine the diameter and length of the particle.
尚、さらに解析をすすめ、波形の数、すなわち
波数により粒子個数、電場内通過時間により粒子
の空気力学的粒径、又は空気抵抗等のフアクター
を求めることもできる。 Further analysis can also be carried out to determine the number of particles based on the number of waveforms, that is, the wave number, and factors such as the aerodynamic diameter of the particles or air resistance based on the time they pass through the electric field.
以上詳細に説明したように、本発明によれば、
気体中に含まれる繊維状又は円筒状粒子の直径及
び長さといつた形状データを電気的にしかも連続
的に測定することが可能となる。 As explained in detail above, according to the present invention,
It becomes possible to electrically and continuously measure shape data such as the diameter and length of fibrous or cylindrical particles contained in gas.
第１図はこの発明の実施例の装置の構成を示す
斜視図である。
１…試料導入管、２…内管、３…外管、４…分
析室、５…電極、６…回転電場発生装置、７…吸
引部、９…検出機構、１１…マイクロホン、１１
…波形解析装置、１２…粒子測定装置。
FIG. 1 is a perspective view showing the configuration of an apparatus according to an embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Sample introduction tube, 2...Inner tube, 3...Outer tube, 4...Analysis chamber, 5...Electrode, 6...Rotating electric field generator, 7...Suction part, 9...Detection mechanism, 11...Microphone, 11
...Waveform analyzer, 12...Particle measurement device.
Claims (1)
ガスで包んで吸入する内外二重管よりなる試料導
入管と、直管の内面に円周を等分して多数の電極
を集列した分析室と、吸引ポンプを順次連結する
とともに、上記分析室側面にマイクロホンおよび
このマイクロホンに連なる波形解析装置および粒
子測定装置からなる検出機構を添設し、さらに前
記各電極を、これら電極中の対向位置にある２個
を常にその一組に限つてそれぞれ正極の高電圧、
負極の高電圧を順次印加すべき回転電場発生装置
に接続してなり、前記繊維状又は円筒状粒子の直
径及び長さを求めることを特徴とする気体中の粒
子の形状を測定する装置。1 Analysis with a sample introduction tube consisting of an inner and outer double tube that inhales a sample gas containing fibrous or cylindrical particles wrapped in clean gas, and a large number of electrodes arranged on the inner surface of the straight tube, dividing the circumference equally The chamber and the suction pump are sequentially connected, and a detection mechanism consisting of a microphone and a waveform analyzer and a particle measuring device connected to the microphone is attached to the side of the analysis chamber, and each of the electrodes is connected to the opposite position of the electrodes. The high voltage of the positive electrode is always applied to only one pair of the two in the
A device for measuring the shape of particles in a gas, characterized in that the device is connected to a rotating electric field generator to which a high voltage of a negative electrode is sequentially applied, and the diameter and length of the fibrous or cylindrical particles are determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13801687A JPS63302342A (en) | 1987-06-01 | 1987-06-01 | Instrument for measuring configuration of particle in gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13801687A JPS63302342A (en) | 1987-06-01 | 1987-06-01 | Instrument for measuring configuration of particle in gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63302342A JPS63302342A (en) | 1988-12-09 |
| JPH0377454B2 true JPH0377454B2 (en) | 1991-12-10 |
Family
ID=15212087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13801687A Granted JPS63302342A (en) | 1987-06-01 | 1987-06-01 | Instrument for measuring configuration of particle in gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63302342A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100668787B1 (en) | 2005-01-25 | 2007-01-12 | 연세대학교 산학협력단 | Particle sampler for sampling particulate contaminants from inside of hard disk drive, and performance valuation device of the same |
| JP4787645B2 (en) * | 2006-03-28 | 2011-10-05 | 倉敷紡績株式会社 | Fibrous particle measuring method and apparatus |
| US8274655B2 (en) | 2009-02-05 | 2012-09-25 | Massachusetts Institute Of Technology | Method and system for in situ aerosol thermo-radiometric analysis |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4633714A (en) * | 1985-08-13 | 1987-01-06 | University Of Arkansas | Aerosol particle charge and size analyzer |
-
1987
- 1987-06-01 JP JP13801687A patent/JPS63302342A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4633714A (en) * | 1985-08-13 | 1987-01-06 | University Of Arkansas | Aerosol particle charge and size analyzer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63302342A (en) | 1988-12-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |