JPWO2019049236A1 - 微粒子検出素子及び微粒子検出器 - Google Patents
微粒子検出素子及び微粒子検出器 Download PDFInfo
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- JPWO2019049236A1 JPWO2019049236A1 JP2018533966A JP2018533966A JPWO2019049236A1 JP WO2019049236 A1 JPWO2019049236 A1 JP WO2019049236A1 JP 2018533966 A JP2018533966 A JP 2018533966A JP 2018533966 A JP2018533966 A JP 2018533966A JP WO2019049236 A1 JPWO2019049236 A1 JP WO2019049236A1
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- 239000010419 fine particle Substances 0.000 title claims abstract description 128
- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 239000002245 particle Substances 0.000 claims description 40
- 239000011859 microparticle Substances 0.000 claims 2
- 230000005684 electric field Effects 0.000 description 35
- 230000006698 induction Effects 0.000 description 17
- 230000000694 effects Effects 0.000 description 13
- 238000009826 distribution Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000005653 Brownian motion process Effects 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
Description
ガス中の微粒子を検出するために用いられる微粒子検出素子であって、
前記ガスが通過するガス流路を有する筐体と、
前記筐体内に導入された前記ガス中の微粒子に放電によって発生させた電荷を付加して帯電微粒子にする電荷発生部と、
前記筐体内で前記電荷発生部よりも前記ガスの流れの下流側に設けられ、前記帯電微粒子を捕集する捕集電極と、
を備え、
前記ガス流路は、矩形のガス導入口から前記ガス導入口と同形のガス排出口まで連なる直方体形状の空間であり、前記ガスの流れの中に前記微粒子検出素子を配置して前記ガス流路に前記ガスを通過させると、前記ガス排出口よりも下流領域に、前記ガスの流速が前記ガス流路の内部を通過する前記ガスの流速よりも低速になる低流速部が発生する、
ものである。
Nt=(蓄積電荷量)/{(素電荷)×(平均帯電数)} …(1)
Claims (7)
- ガス中の微粒子を検出するために用いられる微粒子検出素子であって、
前記ガスが通過するガス流路を有する筐体と、
前記筐体内に導入された前記ガス中の微粒子に放電によって発生させた電荷を付加して帯電微粒子にする電荷発生部と、
前記筐体内で前記電荷発生部よりも前記ガスの流れの下流側に設けられ、前記帯電微粒子を捕集する捕集電極と、
を備え、
前記ガス流路は、矩形のガス導入口から前記ガス導入口と同形のガス排出口まで連なる直方体形状の空間であり、前記ガスの流れの中に前記微粒子検出素子を配置して前記ガス流路に前記ガスを通過させると、前記ガス排出口よりも下流領域に、前記ガスの流速が前記ガス流路の内部を通過する前記ガスの流速よりも低速になる低流速部が発生する、
微粒子検出素子。 - (低流速部におけるガスの流速)/(ガス流路の内部を通過するガスの最大流速)≦0.57を満たす、
請求項1に記載の微粒子検出素子。 - 前記低流速部は、前記ガス排出口を覆うように形成される、
請求項1又は2に記載の微粒子検出素子。 - 前記筐体は、前記ガス流路を構成する一対の流路壁を備え、前記一対の流路壁の間隔を前記ガス流路の流路幅としたとき、(流路壁の壁厚)/(流路幅)≦0.65を満たす、
請求項1〜3のいずれか1項に記載の微粒子検出素子。 - 前記筐体のうち前記ガス導入口の周囲に位置する辺を含む角部の曲率半径は、1.0mm以下である、
請求項1〜4のいずれか1項に記載の微粒子検出素子。 - 前記筐体は、前記ガス流路の軸方向と交差する方向に長い長尺体であり、前記長尺体の長手方向の一端は、前記ガス流路を有し、前記ガスが流通する管の内部に配置され、前記長尺体の長手方向の他端は、少なくとも前記電荷発生部の端子及び前記捕集電極の端子を有し、前記管の外部に配置される、
請求項1〜5のいずれか1項に記載の微粒子検出素子。 - 請求項1〜6のいずれか1項に記載の微粒子検出素子と、
前記捕集電極に捕集された前記帯電微粒子に応じて変化する物理量に基づいて、前記微粒子を検出する検出部と、
を備えた微粒子検出器。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2017/032103 WO2019049236A1 (ja) | 2017-09-06 | 2017-09-06 | 微粒子検出素子及び微粒子検出器 |
Related Child Applications (1)
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JP2018192329A Division JP2019045504A (ja) | 2018-10-11 | 2018-10-11 | 微粒子検出素子及び微粒子検出器 |
Publications (2)
Publication Number | Publication Date |
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JP6420525B1 JP6420525B1 (ja) | 2018-11-07 |
JPWO2019049236A1 true JPWO2019049236A1 (ja) | 2019-11-07 |
Family
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JP2018533966A Expired - Fee Related JP6420525B1 (ja) | 2017-09-06 | 2017-09-06 | 微粒子検出素子及び微粒子検出器 |
Country Status (5)
Country | Link |
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US (1) | US20200200667A1 (ja) |
JP (1) | JP6420525B1 (ja) |
CN (1) | CN111065910A (ja) |
DE (1) | DE112017007992T5 (ja) |
WO (1) | WO2019049236A1 (ja) |
Families Citing this family (1)
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WO2022020482A1 (en) * | 2020-07-22 | 2022-01-27 | Telosair Corp. | Electrostatic precipitation-based sampler for bioaerosol monitoring |
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US455933A (en) * | 1891-07-14 | Extension vehicle-seat | ||
GB2135463B (en) * | 1983-02-18 | 1986-09-24 | Coal Ind | Dust assessment apparatus and method |
JP2006112246A (ja) * | 2004-10-12 | 2006-04-27 | Denso Corp | 内燃機関用排気浄化装置 |
WO2008111403A1 (ja) * | 2007-03-15 | 2008-09-18 | Ngk Insulators, Ltd. | 粒子状物質検出装置 |
WO2011135717A1 (ja) * | 2010-04-30 | 2011-11-03 | トヨタ自動車株式会社 | Pm量検出装置 |
JP5201193B2 (ja) * | 2010-10-28 | 2013-06-05 | 株式会社デンソー | 粒子状物質検出センサ |
JP2013029473A (ja) * | 2011-07-29 | 2013-02-07 | New Cosmos Electric Corp | 吸引式ガス検知器 |
JP5385420B2 (ja) * | 2012-04-23 | 2014-01-08 | 日本特殊陶業株式会社 | 微粒子検知システム |
WO2013183652A1 (ja) * | 2012-06-06 | 2013-12-12 | 株式会社島津製作所 | 微粒子分級測定装置、粒子濃度分布が一様なサンプル作成装置、及びナノ粒子膜成膜装置 |
EP3124951A4 (en) * | 2014-03-26 | 2017-11-22 | NGK Insulators, Ltd. | Fine-particle number measurement device and fine-particle number measurement method |
US10281384B2 (en) * | 2015-08-25 | 2019-05-07 | Ford Global Technologies, Llc | Method and system for exhaust particulate matter sensing |
-
2017
- 2017-09-06 CN CN201780094388.8A patent/CN111065910A/zh active Pending
- 2017-09-06 DE DE112017007992.6T patent/DE112017007992T5/de not_active Withdrawn
- 2017-09-06 JP JP2018533966A patent/JP6420525B1/ja not_active Expired - Fee Related
- 2017-09-06 WO PCT/JP2017/032103 patent/WO2019049236A1/ja active Application Filing
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2020
- 2020-02-28 US US16/804,525 patent/US20200200667A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
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WO2019049236A1 (ja) | 2019-03-14 |
DE112017007992T5 (de) | 2020-06-10 |
US20200200667A1 (en) | 2020-06-25 |
CN111065910A (zh) | 2020-04-24 |
JP6420525B1 (ja) | 2018-11-07 |
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