JPH08193950A - Continuous particulate measuring apparatus - Google Patents
Continuous particulate measuring apparatusInfo
- Publication number
- JPH08193950A JPH08193950A JP2119695A JP2119695A JPH08193950A JP H08193950 A JPH08193950 A JP H08193950A JP 2119695 A JP2119695 A JP 2119695A JP 2119695 A JP2119695 A JP 2119695A JP H08193950 A JPH08193950 A JP H08193950A
- Authority
- JP
- Japan
- Prior art keywords
- sof
- amount
- soot
- measured
- gas
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、デイーゼルエンジン
排ガス中のカーボン粒子（Dry Soot：以下ＳＯＯＴとい
う）の量と、煤の前段階物質であるＨＣ化合物（Solubl
e Organic Fraction：以下ＳＯＦという）の量と、これ
らＳＯＯＴおよびＳＯＦから構成されるパーティキュレ
ート（以下ＰＭという）の量を同時に連続測定できる新
規な連続パーティキュレート測定装置に関するものであ
る。This invention relates to the amount of carbon particles (Dry Soot: hereinafter referred to as "SOOT") in a diesel engine exhaust gas and the HC compound (Solubl) which is a pre-stage substance of soot.
The present invention relates to a novel continuous particulate matter measuring device capable of continuously measuring the amount of e Organic Fraction (hereinafter referred to as SOF) and the amount of particulates (hereinafter referred to as PM) composed of these SOT and SOF simultaneously.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】デイ
ーゼルエンジンから排出された直後の高温の排ガス中に
は、ＳＯＦが蒸発ガスとして含まれている。そして、前
記高温の排ガスが希釈ガスなどによって冷却されると、
ガス状のＳＯＦが凝縮される。しかし、このＳＯＦおよ
びＳＯＯＴ、更には、ＰＭの量を求めるにあたり、従来
では以下に示す，，の問題点がある。2. Description of the Related Art SOF is contained as evaporative gas in high-temperature exhaust gas immediately after it is discharged from a diesel engine. Then, when the high-temperature exhaust gas is cooled by a diluent gas or the like,
Gaseous SOF is condensed. However, in obtaining the SOF and SOOT, and further the amount of PM, there are the following problems in the related art.
【０００３】 フィルター上にサンプリングされたＰ
Ｍに所定の処理を施すことにより、有機溶媒に可溶なＳ
ＯＦの量と、有機溶媒に不可溶なＳＯＯＴの量とからＰ
Ｍの量を測定するフィルター燃焼法では、ＳＯＦの抽出
に時間がかかり応答速度が遅く、しかも間欠的にしか測
定・分析が行えず実用的でなかった。P sampled on the filter
By subjecting M to a predetermined treatment, S soluble in an organic solvent can be obtained.
From the amount of OF and the amount of soot that is insoluble in the organic solvent, P
In the filter combustion method for measuring the amount of M, it takes time to extract SOF, the response speed is slow, and the measurement and analysis can be performed only intermittently, which is not practical.
【０００４】 ＳＯＦ，ＳＯＯＴおよびＰＭの各量を
連続的に測定する装置が特公平５−１１７８７号公報に
開示されており、これは、ＳＯＦの導電率に比べてＳＯ
ＯＴの導電率が十分に高いことを利用して、排ガスのエ
アロゾル（aerosol ）の導電率を測定することによっ
て、デイーゼルエンジンから排出された直後の高温の排
ガス中のＳＯＯＴを連続測定できるように構成されてい
るけれども、ＳＯＦの濃度による影響を受け易いという
ことから、期待する信号を得るのが難しく、正しく計測
できなかった。An apparatus for continuously measuring the respective amounts of SOF, SOOT, and PM is disclosed in Japanese Patent Publication No. 5-11787, which is compared with the conductivity of SOF in SO.
Utilizing the fact that the conductivity of OT is sufficiently high, by measuring the conductivity of the aerosol of exhaust gas, it is possible to continuously measure the SOT in the high temperature exhaust gas immediately after being discharged from the diesel engine. However, since it is easily affected by the concentration of SOF, it was difficult to obtain the expected signal, and the accurate measurement could not be performed.
【０００５】 また、特公平４−２６４１６号公報に
は、各ガスラインでＳＯＯＴ，ＳＯＦを分離し、それぞ
れのガスラインで測定したガス状のＨＣ量の差に基づい
てパーティキュレート中のＨＣ化合物（ＳＯＦ）の量
を、瞬時的に、かつ、連続的に測定できる装置が開示さ
れているけれども、測定対象がＳＯＦの量に限られてお
り、ＳＯＦのみならず、ＳＯＯＴ、更にはＰＭの各量を
連続的に、しかも正しく測定する機構を備えてはいな
い。Further, in Japanese Patent Publication No. 4-26416, SOOT and SOF are separated in each gas line, and the HC compound in the particulate matter (based on the difference in the amount of gaseous HC measured in each gas line) Although an apparatus capable of instantaneously and continuously measuring the amount of SOF) is disclosed, the measurement target is limited to the amount of SOF, and not only SOF but also SOT and even PM. It does not have a mechanism to measure continuously and correctly.
【０００６】このように、従来では、パーティキュレー
ト中のＨＣ化合物（ＳＯＦ）の量とカーボン粒子（ＳＯ
ＯＴ）の量とをそれぞれ自動的に十分に速い応答速度で
測定でき、しかも連続的にＰＭの量も正確に測定できる
装置はなかった。As described above, conventionally, the amount of the HC compound (SOF) in the particulates and the carbon particles (SO
There is no device capable of automatically measuring the amount of OT) and the amount of PM continuously and accurately, respectively.
【０００７】この発明は、上記問題に鑑みてなしたもの
で、その目的は、パーティキュレート中のＨＣ化合物
（ＳＯＦ）の量とカーボン粒子（ＳＯＯＴ）の量とをそ
れぞれ自動的に十分に速い応答速度で測定でき、しかも
連続的にＰＭの量も正確に測定できる連続パーティキュ
レート測定装置を提供することにある。The present invention has been made in view of the above problems, and an object thereof is to automatically and sufficiently respond the amount of HC compounds (SOF) and the amount of carbon particles (SOOT) in particulates. An object of the present invention is to provide a continuous particulate measuring device capable of measuring at a speed and continuously and accurately measuring the amount of PM.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、この発明の連続パーティキュレート測定装置は、カ
ーボン粒子（ＳＯＯＴ）と煤の前段階物質であるＨＣ化
合物（ＳＯＦ）とで構成されたパーティキュレートを含
むデイーゼルエンジン排ガスが導入される第１ガスライ
ンと、加熱によって前記パーティキュレート中のＨＣ化
合物（ＳＯＦ）を蒸発ガス化させた後の排ガスが導入さ
れる、互いに並列に設けられた第２，第３ガスラインと
を備え、前記第１ガスライン、第２ガスラインでそれぞ
れ測定したガス状のＨＣ量の差に基づいて前記パーティ
キュレート中のＨＣ化合物（ＳＯＦ）の量を測定すると
ともに、前記第３ガスラインで、ガスには吸収されず、
前記カーボン粒子（ＳＯＯＴ）には吸収される波長を有
する赤外線を用いて、前記カーボン粒子（ＳＯＯＴ）の
量を測定し、更に、測定された前記パーティキュレート
中のＨＣ化合物（ＳＯＦ）の量とカーボン粒子（ＳＯＯ
Ｔ）の量とに基づいてパーティキュレートの量を測定す
るように構成したことを特徴とする。In order to achieve the above object, the continuous particulate matter measuring device of the present invention is composed of carbon particles (SOOT) and HC compound (SOF) which is a pre-stage substance of soot. A first gas line into which diesel engine exhaust gas containing particulates is introduced, and an exhaust gas after evaporating and gasifying the HC compound (SOF) in the particulates by heating are introduced in parallel with each other. And a third gas line, the amount of HC compound (SOF) in the particulate is measured based on the difference between the amounts of gaseous HC measured in the first gas line and the second gas line, respectively. , Is not absorbed by the gas in the third gas line,
Infrared rays having an absorbed wavelength are used for the carbon particles (SOOT) to measure the amount of the carbon particles (SOOT), and the measured amount of the HC compound (SOF) and carbon in the particulates. Particle (SOO
It is characterized in that the amount of particulates is measured based on the amount of T).
【０００９】[0009]
（１） 第１ガスラインにおいては、ＳＯＦは凝縮して
おり、したがって、ＳＯＦ分を含まないガス状のＨＣ量
を測定する。(1) In the first gas line, SOF is condensed, and therefore the amount of gaseous HC that does not contain SOF is measured.
【００１０】（２） 第２ガスラインにおいては、ＰＭ
中のＳＯＦが蒸発ガス化されているので、ＳＯＦ分を含
むガス状の全ＨＣ量を測定できる。(2) In the second gas line, PM
Since the SOF therein is vaporized and gasified, the total amount of gaseous HC including the SOF content can be measured.
【００１１】（３） 続いて、第１ガスライン、第２ガ
スラインでそれぞれ測定したガス状のＨＣ量の差（ＳＯ
Ｆ分を含む全ＨＣ量とＳＯＦ分を含まないＨＣ量の減
算）に基づいて前記ＰＭ中のＨＣ化合物（ＳＯＦ）の量
を測定できる。(3) Subsequently, the difference in the amount of gaseous HC measured in the first gas line and the second gas line (SO
The amount of the HC compound (SOF) in the PM can be measured based on the subtraction of the total HC amount including the F component and the HC amount not including the SOF component).
【００１２】（４） 第３ガスラインでは、排ガスには
吸収されず、ＳＯＯＴには吸収される波長を有する赤外
線を用いてＳＯＯＴの量を測定できる。(4) In the third gas line, the amount of soot can be measured by using infrared rays having a wavelength that is not absorbed by exhaust gas but is absorbed by soot.
【００１３】そして、上記（３）で測定されたＳＯＦの
量と、上記（４）で測定されたＳＯＯＴの量とに基づい
てＰＭの量を連続的に、しかも正確に測定できる。The amount of PM can be continuously and accurately measured based on the amount of SOF measured in the above (3) and the amount of SOT measured in the above (4).
【００１４】要するに、この発明では、ＰＭ中のＳＯＦ
の量とＳＯＯＴの量とをそれぞれ自動的に十分に速い応
答速度で測定でき、しかも連続的にＰＭの量も正確に測
定できる。In short, according to the present invention, SOF in PM is
And the amount of soot can be automatically measured at a sufficiently fast response speed, and the amount of PM can be continuously and accurately measured.
【００１５】[0015]
【実施例】以下、この発明の実施例を図面に基づいて説
明する。なお、それによってこの発明は限定を受けるも
のではない。図１において、連続パーティキュレート測
定装置は、カーボン粒子（ＳＯＯＴ）と煤の前段階物質
であるＨＣ化合物（ＳＯＦ）とで構成されたパーティキ
ュレート（ＰＭ）を含むデイーゼルエンジン１の排ガス
が導入される第１ガスライン２と、加熱によってＰＭ中
のＳＯＦを蒸発ガス化させた後の排ガスが導入される、
互いに並列に設けられた第２，第３ガスライン３，４と
を備え、第１ガスライン２、第２ガスライン３でそれぞ
れ測定したガス状のＨＣ量の測定値ｂ，ａの差（ＳＯＦ
分を含むガス状の全ＨＣ量の測定値ａとＳＯＦ分を含ま
ないガス状のＨＣ量の測定値ｂとの減算）に基づいてＳ
ＯＦの量を測定するとともに、第３ガスライン４で、ガ
スには吸収されず、ＳＯＯＴには吸収される波長を有す
る赤外線を用いて、ＳＯＯＴの量を測定し、更に、測定
されたＰＭ中のＳＯＦの量とＳＯＯＴの量とに基づいて
ＰＭの量を測定するように構成してある。Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited thereby. In FIG. 1, a continuous particulate matter measuring apparatus introduces exhaust gas of a diesel engine 1 containing particulate matter (PM) composed of carbon particles (SOOT) and HC compound (SOF) which is a pre-stage substance of soot. The first gas line 2 and the exhaust gas after evaporating and gasifying SOF in PM by heating are introduced,
The second and third gas lines 3 and 4 provided in parallel with each other are provided, and the difference (SOF) between the measured values b and a of the gaseous HC amount measured in the first gas line 2 and the second gas line 3, respectively.
S) based on the subtraction of the measured value a of the total gaseous HC amount including the amount and the measured value b of the gaseous HC amount not including the SOF component).
While measuring the amount of OF, the third gas line 4 is used to measure the amount of soot using infrared rays having a wavelength that is not absorbed by the gas but is absorbed by the soot, and further, in the measured PM. The PM amount is measured based on the SOF amount and the SOT amount.
【００１６】第１ガスライン２においては、ＳＯＯＴと
凝縮したＳＯＦとで構成されたＰＭを含むデイーゼルエ
ンジン排ガスが導入され、このＳＯＯＴ、ＳＯＦおよび
その他の夾雑物を捕捉する第１フィルター５と、該第１
フィルター５を通過した後の排ガス中のＳＯＦ分を含ま
ないガス状のＨＣ量の測定値ｂを測定する第１測定器６
が設けられている。In the first gas line 2, diesel engine exhaust gas containing PM composed of soot and condensed SOF is introduced, and the first filter 5 for trapping the soot, SOF and other contaminants, First
A first measuring instrument 6 for measuring a measured value b of the amount of gaseous HC that does not contain SOF in the exhaust gas after passing through the filter 5.
Is provided.
【００１７】また、７は、第２，第３ガスライン３，４
を加熱する加熱部である。そして、第２ガスライン３に
おいては、ＰＭ中のＳＯＦを蒸発ガス化させた後の排ガ
ス中のＳＯＯＴおよびその他の夾雑物を捕捉する第２フ
ィルター８と、該第２フィルター８を通過した後のＳＯ
Ｆ分を含むガス状の全ＨＣの量を測定する第２測定器９
が設けられている。Further, 7 is the second and third gas lines 3, 4
Is a heating unit for heating. Then, in the second gas line 3, a second filter 8 for capturing SOT and other contaminants in the exhaust gas after evaporating and gasifying SOF in PM, and a second filter 8 after passing through the second filter 8 SO
Second measuring instrument 9 for measuring the amount of gaseous HC including F
Is provided.
【００１８】１０は第１演算器で、第１測定器６からの
測定値ｂと第２測定器９からの測定値ａを基にして、そ
の差からＰＭ中のＨＣ化合物（ＳＯＦ）の量を演算する
ものである。Numeral 10 is a first computing unit, which is based on the measured value b from the first measuring device 6 and the measured value a from the second measuring device 9, and based on the difference, the amount of HC compound (SOF) in PM. Is calculated.
【００１９】更に、第３ガスライン４では、通過する排
ガスを加熱してＰＭ中のＳＯＦを蒸発ガス化させ、しか
もこの蒸発ガス化後における排ガスには吸収されず、Ｓ
ＯＯＴには吸収される波長を有する赤外線によりＳＯＯ
Ｔの量を測定する第３測定器１１が設けられている。し
たがって、排ガスのエアロゾルの導電率を測定すること
によって、デイーゼルエンジンから排出された直後の高
温の排ガス中のＳＯＯＴを測定していた従来装置のよう
に、ＳＯＦの濃度による影響を受けることがなく、正確
な測定値ｃを得ることができる。Further, in the third gas line 4, the exhaust gas passing therethrough is heated to vaporize SOF in the PM, and the exhaust gas after vaporization is not absorbed, so that S
The OOT is SOO due to infrared rays having a wavelength that is absorbed.
A third measuring device 11 for measuring the amount of T is provided. Therefore, by measuring the conductivity of the aerosol of the exhaust gas, there is no influence of the concentration of SOF, unlike the conventional device that measures the SOT in the high-temperature exhaust gas immediately after being discharged from the diesel engine, An accurate measurement value c can be obtained.
【００２０】また、１２は第２演算器で、第３測定器１
１からの測定値ｃと第１演算器１０からの演算値ｄを基
にして、その和からＰＭの量を測定するものである。す
なわち、演算値ｄはＰＭ中のＨＣ化合物（ＳＯＦ）の量
の測定値であり、これに、ＳＯＯＴの量の測定値ｃを加
算することにより、ＰＭの量を連続的に、しかも正確に
測定できる。Reference numeral 12 is a second arithmetic unit, which is a third measuring device 1.
Based on the measured value c from 1 and the calculated value d from the first calculator 10, the amount of PM is measured from the sum thereof. That is, the calculated value d is a measured value of the amount of the HC compound (SOF) in PM, and the measured value c of the amount of SOOT is added to this to measure the amount of PM continuously and accurately. it can.
【００２１】このように、本実施例では、ＳＯＦの抽出
に時間がかかり応答速度が遅く、しかも間欠的にしか測
定・分析が行えなかったフィルター燃焼法に比して、Ｓ
ＯＦの量の測定値ｄとＳＯＯＴの量の測定値ｃを正確に
求めることができる上に、連続的にＰＭの量の測定値ｃ
＋ｄも正確に求めることができる。As described above, in the present embodiment, the SOF extraction takes a long time, the response speed is slow, and the S / S ratio is lower than that of the filter combustion method in which the measurement / analysis can be performed only intermittently.
The measured value d of the amount of OF and the measured value c of the amount of SOOT can be accurately obtained, and the measured value c of the amount of PM is continuously measured.
+ D can also be calculated accurately.
【００２２】なお、１２はデイーゼルエンジン１の排ガ
ス管に接続された希釈トンネルで、サンプルガス取出管
１３が分岐連設されている。そして、第１，２，３各ガ
スライン２，３，４がガス取出管１３に並列接続されて
いる。Reference numeral 12 is a dilution tunnel connected to the exhaust gas pipe of the diesel engine 1, and a sample gas extraction pipe 13 is branched and connected. The first, second and third gas lines 2, 3 and 4 are connected in parallel to the gas extraction pipe 13.
【００２３】また、ＳＯＯＴの量の正確な測定値ｃは、
例えば、３．８μｍ等の赤外線の吸光度より求めること
ができる。Further, the accurate measured value c of the soot amount is
For example, it can be determined from the absorbance of infrared rays such as 3.8 μm.
【００２４】[0024]
【発明の効果】以上のようにこの発明では、第１ガスラ
イン、第２ガスラインでそれぞれ測定したガス状のＨＣ
量の差（ＳＯＦ分を含む全ＨＣ量とＳＯＦ分を含まない
ＨＣ量の減算）に基づいて前記ＰＭ中のＨＣ化合物（Ｓ
ＯＦ）の量を測定できる。As described above, according to the present invention, gaseous HC measured in the first gas line and the second gas line, respectively.
Based on the difference in the amount (subtraction of the total HC amount including the SOF component and the HC amount not including the SOF component), the HC compound (S
The amount of OF) can be measured.
【００２５】第３ガスラインでは、排ガスには吸収され
ず、ＳＯＯＴには吸収される波長を有する赤外線を用い
てＳＯＯＴの量を測定する。In the third gas line, the amount of soot is measured by using infrared rays having a wavelength that is not absorbed by exhaust gas but is absorbed by soot.
【００２６】そして、測定されたＳＯＦの量と、測定さ
れたＳＯＯＴの量とに基づいてＰＭの量を連続的に、し
かも正確に測定できる。The amount of PM can be continuously and accurately measured based on the measured amount of SOF and the measured amount of SOT.
【００２７】要するに、この発明では、ＰＭ中のＳＯＦ
の量とＳＯＯＴの量とをそれぞれ自動的に十分に速い応
答速度で測定でき、しかも連続的にＰＭの量も正確に測
定できる。In short, according to the present invention, SOF in PM is
And the amount of soot can be automatically measured at a sufficiently fast response speed, and the amount of PM can be continuously and accurately measured.
【図１】この発明の一実施例を示す全体構成説明図であ
る。FIG. 1 is an explanatory diagram of an overall configuration showing an embodiment of the present invention.
２…第１ガスライン、３…第２ガスライン、４…第３ガ
スライン、ａ…第２ガスラインで測定したＳＯＦ分を含
むガス状の全ＨＣ量の測定値、ｂ…第１ガスラインで測
定したＳＯＦ分を含まないガス状のＨＣ量の測定値、ｃ
…第３ガスラインで測定したＳＯＯＴの測定値、ｄ…Ｓ
ＯＦの量の測定値。2 ... 1st gas line, 3 ... 2nd gas line, 4 ... 3rd gas line, a ... Measured value of total gaseous HC amount including SOF content measured by 2nd gas line, b ... 1st gas line Measured value of gaseous HC amount not including SOF content measured in
... SOOT measurement value measured on the third gas line, d ... S
Measured amount of OF.
Claims (1)
物質であるＨＣ化合物（ＳＯＦ）とで構成されたパーテ
ィキュレートを含むデイーゼルエンジン排ガスが導入さ
れる第１ガスラインと、加熱によって前記パーティキュ
レート中のＨＣ化合物（ＳＯＦ）を蒸発ガス化させた後
の排ガスが導入される、互いに並列に設けられた第２，
第３ガスラインとを備え、前記第１ガスライン、第２ガ
スラインでそれぞれ測定したガス状のＨＣ量の差に基づ
いて前記パーティキュレート中のＨＣ化合物（ＳＯＦ）
の量を測定するとともに、前記第３ガスラインで、ガス
には吸収されず、前記カーボン粒子（ＳＯＯＴ）には吸
収される波長を有する赤外線を用いて、前記カーボン粒
子（ＳＯＯＴ）の量を測定し、更に、測定された前記パ
ーティキュレート中のＨＣ化合物（ＳＯＦ）の量とカー
ボン粒子（ＳＯＯＴ）の量とに基づいてパーティキュレ
ートの量を測定するように構成したことを特徴とする連
続パーティキュレート測定装置。1. A first gas line into which a diesel engine exhaust gas containing a particulate composed of carbon particles (SOOT) and a HC compound (SOF) which is a pre-stage substance of soot is introduced, and the particulate by heating. The second exhaust gas, which is provided in parallel with each other, into which the exhaust gas after vaporizing the HC compound (SOF) therein is introduced.
A third gas line, and based on the difference in the amount of gaseous HC measured in the first gas line and the second gas line, the HC compound (SOF) in the particulates.
And the amount of carbon particles (SOOT) is measured in the third gas line by using infrared rays having a wavelength that is not absorbed by gas but is absorbed by the carbon particles (SOOT). In addition, the continuous particulate matter is configured to measure the amount of the particulate matter based on the measured amount of the HC compound (SOF) and the amount of the carbon particles (SOOT) in the particulate matter. measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02119695A JP3523354B2 (en) | 1995-01-14 | 1995-01-14 | Continuous particulate measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02119695A JP3523354B2 (en) | 1995-01-14 | 1995-01-14 | Continuous particulate measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08193950A true JPH08193950A (en) | 1996-07-30 |
| JP3523354B2 JP3523354B2 (en) | 2004-04-26 |
Family
ID=12048220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02119695A Expired - Lifetime JP3523354B2 (en) | 1995-01-14 | 1995-01-14 | Continuous particulate measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3523354B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004354370A (en) * | 2003-04-11 | 2004-12-16 | Matter Engineering Ag | Method and apparatus for detecting, characterizing and/or eliminating floating fine particles |
| CN104297116A (en) * | 2011-10-11 | 2015-01-21 | 波音公司 | Systems and methods for detecting volcanic ash embedded in water vapor clouds |
| JP2016173251A (en) * | 2015-03-16 | 2016-09-29 | 株式会社日本自動車部品総合研究所 | Particulate matter detection sensor |
-
1995
- 1995-01-14 JP JP02119695A patent/JP3523354B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004354370A (en) * | 2003-04-11 | 2004-12-16 | Matter Engineering Ag | Method and apparatus for detecting, characterizing and/or eliminating floating fine particles |
| CN104297116A (en) * | 2011-10-11 | 2015-01-21 | 波音公司 | Systems and methods for detecting volcanic ash embedded in water vapor clouds |
| CN104297116B (en) * | 2011-10-11 | 2016-09-28 | 波音公司 | Detection embeds the system and method for the volcanic ash in steam cloud |
| JP2016173251A (en) * | 2015-03-16 | 2016-09-29 | 株式会社日本自動車部品総合研究所 | Particulate matter detection sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3523354B2 (en) | 2004-04-26 |
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