KR100501872B1 - A Real-Time Instrument for Measuring Diesel Particulate Matter - Google Patents
A Real-Time Instrument for Measuring Diesel Particulate Matter Download PDFInfo
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- KR100501872B1 KR100501872B1 KR10-2003-0002426A KR20030002426A KR100501872B1 KR 100501872 B1 KR100501872 B1 KR 100501872B1 KR 20030002426 A KR20030002426 A KR 20030002426A KR 100501872 B1 KR100501872 B1 KR 100501872B1
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- 239000013618 particulate matter Substances 0.000 title description 3
- 239000002245 particle Substances 0.000 claims abstract description 49
- 239000004071 soot Substances 0.000 claims abstract description 46
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 239000000779 smoke Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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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
- G01N15/02—Investigating particle size or size distribution
- G01N15/0266—Investigating particle size or size distribution with electrical classification
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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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
- G01N2015/0096—Investigating consistence of powders, dustability, dustiness
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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
- G01N15/02—Investigating particle size or size distribution
- G01N15/0255—Investigating particle size or size distribution with mechanical, e.g. inertial, classification, and investigation of sorted collections
- G01N2015/0261—Investigating particle size or size distribution with mechanical, e.g. inertial, classification, and investigation of sorted collections using impactors
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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
- G01N15/02—Investigating particle size or size distribution
- G01N2015/0288—Sorting the particles
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Abstract
본 발명은 실시간 디젤 매연 측정기에 관한 것으로서, 실시간 디젤 매연 측정기는 입자 하전기와 복수개의 임팩터를 포함하는 매연 측정용 3단 임팩터와 전기적 감지부 및 페러데이 케이지로 구성되며, 상기 입자 하전기는 매연의 직경에 따라 동일한 전하량을 부가하고, 상기 각 임팩터는 매연 입자가 충돌하는 충돌기판을 구비한 구조로 이루어져 있다. The present invention relates to a real-time diesel smoke measuring device, the real-time diesel smoke measuring device is composed of a three-stage impactor for measuring the smoke comprising a particle charge and a plurality of impactors, an electrical sensing unit and a Faraday cage, the particle charge of the smoke The same amount of charge is added according to the diameter, and each of the impactors has a structure including a collision substrate on which soot particles collide.
본 발명의 충돌기판은 상부 표면이 전기 전도성이 좋은 금속이나 매연 입자를 포집할 수 있는 전도성 필터 여지(conductive filter media)로 덮여지고, 작은 크기의 매연 입자를 채취할 수 있도록 임팩터의 중간 2개의 단에 압력강하용 오리피스를 장착한 구조로 이루어져 있다. The impingement substrate of the present invention is covered with a conductive filter media capable of capturing metal or soot particles with good electrical conductivity, and the middle two stages of the impactor to collect small particles of soot. It consists of a structure equipped with a pressure drop orifice.
본 발명의 전기적 감지부는 측정부에서 전기적 노이즈가 발생되지 않도록 3단 임팩터를 전도성 원통형 벽으로 차폐하여 극미량 전류계(electrometer)에 연결된 구조로 이루어져 있다. 특히 상기 페러데이 케이지는 공기를 통과시키면서 대전된 입자의 전하량을 측정할 수 있도록 이루어지며, 이를 이용하면 디젤 자동차에서 배출되는 매연의 크기분포 및 농도를 실시간으로 간단하게 측정할 수 있다. The electrical sensing unit of the present invention has a structure in which a three-stage impactor is shielded by a conductive cylindrical wall so as not to generate electrical noise in the measuring unit, and connected to an extremely small amount of ammeter. In particular, the Faraday cage is made to measure the amount of charge of the charged particles while passing through the air, it is possible to simply measure the size distribution and concentration of the smoke emitted from the diesel vehicle in real time.
Description
본 발명은 임팩터 방식의 실시간 디젤 매연 측정기에 관한 것으로, 보다 상세하게는 디젤 자동차에서 배출되는 미세한 매연의 개수농도를 신속,간편하게 측정할 수 있도록 한 것이다. 특히 디젤 자동차에서 배출되는 매연의 크기분포 및 농도를 실시간으로 간단하게 측정할 수 있다. The present invention relates to an impact type real-time diesel smoke measuring device, and more particularly, to be able to quickly and easily measure the number concentration of the fine smoke discharged from a diesel vehicle. In particular, the size distribution and concentration of soot emitted from diesel vehicles can be easily measured in real time.
일반적으로 디젤 엔진에서 배출되는 매연은 엔진의 부하에 따라 입자상 물질의 개수 평균 입경(number mean diameter)과 농도가 다르지만, 대부분의 경우 개수 평균 입경이 0.05∼0.2㎛ 범위에 있고, 1㎛ 이하인 입자가 개수농도로 90% 이상, 질량농도로 70% 이상을 차지하는 것으로 알려져 있다. 특히 대도시에서 디젤 자동차로부터 배출되는 매연에 의한 대기오염의 증가 및 인체 유해성에 관해서는 널리 알려져 있으며, 환경 및 보건 문제에 대하여 현재 많은 연구가 이루어지고 있다. In general, the smoke emitted from a diesel engine has a different number mean diameter and concentration of particulate matter depending on the load of the engine. However, in most cases, the number average particle diameter is in the range of 0.05 to 0.2 μm, and particles having 1 μm or less It is known to make up more than 90% by the concentration concentration and more than 70% by the mass concentration. In particular, the increase in air pollution and the human hazards caused by the smoke emitted from diesel cars in large cities is widely known, and many studies have been made on environmental and health issues.
또한, 최근 국내에서는 새로 출시되는 신차의 매연 배출량을 규제할 뿐만 아니라 운행중인 차량에 대해서도 법적으로 규제하려고 하고 있다. In addition, recently, in Korea, the government is trying to regulate the emissions of new cars as well as the legally regulated vehicles.
그런데, 현재 디젤 매연의 측정기술은 단순히 매연을 필터 여지(filter media)에 거른 후, 광학적인 투과량의 정도를 이용해 차량에서 배출되는 매연의 농도를 산출하거나, 또는 필터 여지에 걸린 매연의 무게를 측정하는 정도에 그치고 있고, 이러한 광학적 투과나 무게 측정 등의 측정방법은 대기오염이나 인체 보건에 치명적인 것으로 알려져 있는 1㎛ 이하인 입자의 양을 추정하는 방법으로는 적당하지 않다. However, the current measurement technology of diesel soot simply filters the soot into the filter media, and then calculates the concentration of the soot emitted from the vehicle using the optical transmission amount, or measures the weight of the soot caught in the filter media. The measurement method such as optical transmission and weight measurement is not suitable as a method of estimating the amount of particles having a size of 1 μm or less, which is known to be fatal to air pollution or human health.
아울러 광학적 투과량의 정도를 통해 매연의 양을 측정하는 스모크 테스터는, 큰 입자들에 비해 미세한 입자의 영향이 미미하기 때문에 대기오염과 인체에 나쁜 영향을 미치는 1㎛ 이하인 미세 입자의 정량화에는 적당하지 않다. 필터 여지에 매연을 샘플링하여 무게를 측정하는 방법 또한 입자의 직경이 증가하면 무게는 직경의 세제곱에 비례하여 증가하므로, 대부분 1㎛ 이상인 큰 입자에 의해 매연의 양(질량농도)이 결정된다. In addition, the smoke tester that measures the amount of soot through the degree of optical transmission is not suitable for the quantification of fine particles having a particle size of 1 μm or less, which has a bad effect on the air pollution and the human body because the effect of the fine particles is small compared to the large particles. . The method of measuring the weight by sampling the soot in the filter filter. Also, as the diameter of the particles increases, the weight increases in proportion to the cube of the diameter, so the amount (mass concentration) of the soot is largely determined by the large particles of 1 µm or more.
다단 임팩터는 대기 먼지, 공장이나 소각로 등의 배출 먼지의 크기분포를 측정하는데 널리 사용되는 장비로 보통 8∼10단 정도로 구성되고, 0.3㎛ 이상인 먼지의 크기분포를 측정할 수 있다. 그렇지만, 8∼10개의 많은 단을 장착하고 운전해야 하기 때문에 사용 및 관리가 복잡하므로, 전문적인 지식을 갖춘 전문가용으로 사용하고 있다. Multi-stage impactor is a widely used equipment to measure the size distribution of air dust, emission dust such as factory or incinerator. It is composed of 8 ~ 10 stages and can measure the size distribution of dust over 0.3㎛. However, since it is complicated to use and manage because it requires mounting and operating a large number of 8 to 10 stages, it is used for professionals with expert knowledge.
최근에 실시간으로 먼지의 크기분포를 측정하는 장비인 전기적 저압 임팩터가 상용화되어 있지만, 다공노즐과 충돌기판이 한조로 이루어진 10개 이상의 단으로 구성되어 구조가 복잡하고, 가격이 비싸 전문적인 연구에 제한적으로 사용되고 있다. Recently, the electric low pressure impactor, a device for measuring the size distribution of dust in real time, has been commercialized. However, the structure is complicated and expensive due to the complicated structure of the porous nozzle and the collision board consisting of 10 or more stages. Is being used.
결국, 디젤 매연을 감소시키기 위한 배출 가스 검사에서는 구조가 간단하고 가격도 저렴하면서 짧은 시간 내에 디젤 매연의 양을 크기별로 비교적 정확하게 정량적으로 측정할 수 있는 장비가 필요하다. As a result, the exhaust gas inspection to reduce diesel soot requires equipment that is simple in structure and inexpensive and capable of quantitatively measuring the amount of diesel soot relatively accurately in a short time.
본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 실시간 디젤 매연 측정기는 디젤 자동차로부터 배출되는 매연의 크기분포를 간단하게 실시간으로 측정하여 배출되는 매연의 총량을 비교적 정확하게 검사할 수 있는 임팩터 방식의 실시간 디젤 매연 측정기를 제공하는 것을 목적으로 한다. The present invention is to solve the above problems, the real-time diesel soot measuring device is a real-time impactor method that can measure the total amount of soot discharged by accurately measuring the size distribution of the soot discharged from a diesel vehicle in real time. It is an object to provide a diesel soot meter.
본 발명은 입자 하전기와 복수개의 임팩터를 포함하는 매연 측정용 3단 임팩터와 전기적 감지부 및 페러데이 케이지로 구성되며, 상기 입자 하전기는 매연의 직경에 따라 동일한 전하량을 부가하고, 상기 각 임팩터는 매연 입자가 충돌하는 충돌 기판을 구비한 것으로서, 상기 충돌기판은 상부 표면이 전기 전도성이 좋은 금속이나 매연 입자를 포집할 수 있는 전도성 필터 여지(conductive filter media)로 덮여지고, 작은 크기의 매연 입자를 채취할 수 있도록 임팩터의 중간 2개의 단에 압력강하용 오리피스를 장착한 것을 특징으로 한다.The present invention comprises a three-stage impactor for measuring soot including a particle charge and a plurality of impactors, an electrical sensing unit, and a Faraday cage, wherein the particle charge adds the same amount of charge according to the diameter of the smoke, and each impactor The impact substrate is provided with a collision substrate to which soot particles collide with each other. The collision substrate is covered with a conductive filter media capable of collecting metal or soot particles having good electrical conductivity, and collecting small particles of soot. It is characterized in that the pressure drop orifice is mounted on the middle two stages of the impactor to collect.
또한, 상기 전기적 감지부는 측정부에서 전기적 노이즈가 발생되지 않도록 3단 임팩터를 전도성 원통형 벽으로 차폐하여 극미량 전류계(electrometer)에 연결되는 것을 특징으로 하며, 상기 페러데이 케이지는 공기를 통과시키면서 대전된 입자의 전하량을 측정할 수 있는 것을 특징으로 하며, 이를 이용하면 디젤 자동차에서 배출되는 매연의 크기분포 및 농도를 실시간으로 간단하게 측정할 수 있는 점에 특징이 있다.In addition, the electrical sensing unit is characterized in that the three-stage impactor is shielded by a conductive cylindrical wall so as not to generate electrical noise in the measuring unit is connected to an extremely small current meter (electrometer), the Faraday cage of the charged particles while passing air Characterized in that the amount of charge can be measured, it is characterized in that it is possible to simply measure the size distribution and concentration of the smoke emitted from the diesel vehicle in real time.
또한, 본 발명은 디젤 매연의 크기를 크게 5가지로 분류하여 간단하게 입경분포와 인체에 유해한 크기의 매연 농도를 실시간으로 측정할 수 있다. 즉, 분리 입경이 2.5㎛인 예비 임팩터 단을 맨 위에 설치하고, 분리 입경이 0.5, 0.12, 0.04㎛인 임팩터 단을 차례로 설치한 후 마지막에 페러데이 케이지를 설치하여 매연 입자의 크기분포를 측정한다.In addition, the present invention can be divided into five large sizes of diesel soot can simply measure the particle size distribution and concentration of soot harmful to the human body in real time. That is, a preliminary impactor stage having a separation particle diameter of 2.5 μm is installed on the top, an impactor stage having a separation particle diameter of 0.5, 0.12, and 0.04 μm is sequentially installed, and a Faraday cage is finally installed to measure the size distribution of the soot particles.
이하, 본 발명을 첨부된 예시도면 의거 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail based on the accompanying drawings.
먼저, 첨부된 예시도면 도 1은 본 발명이 대상으로 하는 디젤 자동차로부터 배출되는 매연(개수농도)의 전형적인 크기분포와 본 발명에 의한 실시간 디젤 매연 측정기의 분리 입경을 함께 나타낸 그래프이다. First, Figure 1 is a graph showing a typical size distribution of the soot (water concentration) discharged from the diesel vehicle targeted by the present invention and the separation particle size of the real-time diesel soot measuring device according to the present invention.
여기서 엔진의 부하에 따라 매연 입자의 피크 직경(mode diameter)은 수십 나노미터에서 백 나노미터의 범위이므로, 디젤 매연의 크기별 개수분포를 잘 추정하는데 적합하도록 디젤 매연 측정기의 분리 입경을 설정하여야 한다. Since the peak diameter of the soot particles ranges from several tens of nanometers to one hundred nanometers depending on the load of the engine, the separation particle diameter of the diesel soot meter should be set so as to be suitable for estimating the number distribution of diesel soot by size.
첨부된 예시도면 도 2는 본 발명에 따른 실시간 디젤 매연 측정기의 구성도를 나타낸 것으로, 실시간 디젤 매연 측정기는 입자 하전기(2), 본체(main body)(A), 유량조절밸브(13) 및 진공펌프(14)로 구성되는데, 상기 입자 하전기(2)는 코로나 방전을 이용하여 입자의 크기에 따라 일정한 전하량을 부가할 수 있는 하전기이다. 2 is a view illustrating a configuration of a real-time diesel soot measuring device according to the present invention, the real-time diesel soot measuring device has a particle charge (2), the main body (A), the flow control valve 13 and Consists of a vacuum pump 14, the particle charge (2) is a charge that can add a certain amount of charge according to the size of the particles by using a corona discharge.
상기 본체(A)에는 입하 하전기(2)를 통과한 대전된 입자를 포함한 공기흐름(1)이 유입되는 입구(inlet, 3)와, 각각 전도성 다중노즐(4) 및 전도성 충돌기판(5)을 포함한 복수 개의 단(stage), 다중노즐(4)과 충돌기판(5)을 지지하는 전도성 지지체(6) 이 전도성 지지체(6)에 연결되어 극미량의 전류를 측정할 수 있는 BNC 커넥터(7), 각 단에서 전류의 이동을 차단하는 중간 절연성 지지체(8), 전도성 재질의 최종필터(9), 최종 필터의 전도성 지지체(10) 및 절연성 지지체(11) 및 측정부의 전기적 노이즈를 줄이기 위한 차폐 원통(12)으로 구성된다. The main body A has an inlet 3 through which an air flow 1 including charged particles passing through the charging and discharging machine 2 flows, and the conductive multi-nozzle 4 and the conductive collision substrate 5, respectively. A plurality of stage, the multi-nozzle (4) and the conductive support 6 for supporting the impingement substrate 5 is connected to the conductive support (6) BNC connector (7) capable of measuring a very small amount of current , A shielding cylinder for reducing the electrical noise of the intermediate insulating support (8), the final filter (9) of the conductive material, the conductive support (10) and the insulating support (11) of the final filter and the measuring unit to block the movement of current at each stage It consists of (12).
상기 공기흐름(1)에 포함된 입자가 하전기(2)를 통과하면, 입자크기에 따라 일정한 전하량을 갖고, 이렇게 대전된 입자가 임팩터 본체의 입구(3)로 유입된 후, 각 임팩터 단의 노즐판(4)과 충돌기판(5)을 차례로 통과하면서 공기 중에 포함된 큰 입자부터 크기별로 충돌 기판(5)에 충돌하는 순간, 대전 입자의 전하량이 전도성 지지체(6)를 거쳐 BNC 커넥터(7)에 연결된 극미량 전류계로 전달되어 전류가 측정된다. When the particles included in the air stream 1 pass through the charged device 2, the particles have a constant charge amount according to the particle size, and the charged particles are introduced into the inlet 3 of the impactor main body, and then each of the impactor stages. Instantly passing through the nozzle plate 4 and the impingement substrate 5 while impinging on the impingement substrate 5 according to the size of the large particles contained in the air, the charge amount of the charged particles passes through the conductive support 6 and the BNC connector 7 Current is measured by the trace meter connected to the micrometer.
최종적으로 전도성 최종필터(9)에서 나머지 입자가 포집되는 순간, 대전 입자의 전하량이 전도성 지지체(10)와 BNC 커넥터(7)에 연결된 극미량 전류계로 전달되어 전류가 측정되고, 입자가 제거된 깨끗한 공기흐름(1)은 화살표와 같이 출구를 통해 외부로 빠져나간다. Finally, as soon as the remaining particles are collected in the conductive final filter 9, the charge amount of the charged particles is transferred to the micrometer ammeter connected to the conductive support 10 and the BNC connector 7, the current is measured, and the particles are removed. Flow 1 exits through the outlet as an arrow.
본체(A)를 차폐 원통(12)의 내부에 수용,설치하여 측정부의 2중의 전기적 차폐가 가능하도록 하여 전기적 노이즈를 제거한다. 입자 하전기(2)와 3단 임팩터를 통과하는 유량은 진공펌프(14)에 의해 흡인되고, 마지막 임팩터 단과 전도성 최종 필터(9) 사이의 진공도를 진공계(15)로 측정하며, 유량조절밸브(13)를 사용하여 실시간 디젤 매연 측정기의 흡인 유량을 일정하게 조절한다. The main body A is accommodated and installed inside the shielding cylinder 12 to enable double electrical shielding of the measuring unit to remove electrical noise. The flow rate through the particle charger 2 and the three-stage impactor is sucked by the vacuum pump 14, and the vacuum degree between the last impactor stage and the conductive final filter 9 is measured by a vacuum gauge 15, and a flow control valve ( 13) to constantly adjust the suction flow rate of the real-time diesel soot meter.
첨부된 예시도면 도 3은 본 발명에 의한 실시간 디젤 매연 측정기를 구성하는 매연 포집용 충돌기판의 상세도이다. 매연 입자가 충돌하는 충돌기판(5)은, 상부 표면이 매연 입자를 잘 포집할 수 있는 전도성 필터 여지(19)나 알미늄 호일(19)로 덮여지고, 임팩터의 첫 번째와 마지막 단의 충돌기판(5)은 공기가 다음 단으로 압력강하 없이 잘 빠져나갈 수 있도록 장공(17)을 가공하였다. 임팩터의 중간에 위치한 2개의 단의 충돌기판(5)에는 압력강하용 오리피스(21)를 설치하여, 작은 크기의 매연 입자를 채취할 수 있도록 하였다. 또한, 필터 여지(19)나 알미늄 호일(19)을 고정하기 위한 고정판(18)을 설치하였다.Figure 3 is a detailed view of the soot collecting impact substrate constituting the real-time diesel smoke measuring machine according to the present invention. The impact substrate 5, on which the soot particles collide, is covered with a conductive filter filter 19 or aluminum foil 19, the upper surface of which can capture soot particles well, and the impact substrates of the first and last stages of the impactor. 5) machined the long hole 17 so that air can escape well to the next stage without pressure drop. A pressure drop orifice 21 is installed in the collision substrate 5 of two stages located in the middle of the impactor, so that particulate matter of small size can be collected. Moreover, the fixing plate 18 for fixing the filter filter 19 and the aluminum foil 19 was provided.
본 발명은 인체에 해로운 입자 크기로 알려져 있는 지름이 2.5㎛ 이하인 디젤 자동차에서 배출되는 매연의 크기분포와 농도를 실시간으로 간단하고 정량적으로 측정할 수 있는 효과가 있다.The present invention has the effect that it is possible to measure in real time simply and quantitatively the size distribution and concentration of soot emitted from diesel cars having a diameter of 2.5 μm or less, which is known to be harmful to the human body.
또한, 본 발명은 도로상의 자동차로부터 배출되는 인체에 해로운 매연의 개수농도를 실시간으로 쉽게 알 수 있을 뿐만 아니라 자동차 검사시 차량의 매연 배출량을 쉽게 측정할 수 있다. In addition, the present invention can easily determine in real time the number concentration of soot harmful to the human body discharged from the vehicle on the road, and can easily measure the soot emissions of the vehicle during the inspection of the vehicle.
도 1은 엔진의 부하에 따라 본 발명이 대상으로 하는 디젤 자동차로부터 배출되는 매연(개수농도)의 전형적인 크기분포 및 본 발명에서 실시간 디젤 매연 측정기의 분리 입경을 함께 나타낸 그래프이다.1 is a graph showing the typical size distribution of the soot (water concentration) discharged from the diesel vehicle targeted by the present invention according to the load of the engine and the separated particle diameter of the real-time diesel soot measuring device in the present invention.
도 2는 본 발명에 따른 실시간 디젤 매연 측정기의 구성도이다.2 is a block diagram of a real-time diesel soot measuring instrument according to the present invention.
도 3은 본 발명에 따른 실시간 디젤 매연 측정기를 구성하는 매연 포집용 충돌 기판의 상세도이다.3 is a detailed view of a soot collecting collision substrate constituting a real-time diesel soot measuring device according to the present invention.
* 도면의 주요 부분에 대한 설명 *Description of the main parts of the drawing
1 : 공기 흐름 2 : 입자 하전기1: air flow 2: particle charge
3 : 임팩터 입구 4 : 전도성 다중노즐3: impactor inlet 4: conductive multi-nozzle
5 : 충돌기판 6,10 : 전도성 지지체5 impingement substrate 6,10 conductive support
7 : BNC 커넥터 8,11 : 절연성 지지체7: BNC connector 8,11: insulating support
9 : 최종필터 12 : 차폐원통9: final filter 12: shielding cylinder
13 : 유량조절밸브 14 : 진공펌프13: flow control valve 14: vacuum pump
15 : 진공계 17 : 장공15: vacuum gauge 17: long hole
18 : 충돌기판의 필터 여지 고정판 19 : 필터 여지 또는 알루미늄 호일18: filter sheet fixing plate of the impingement substrate 19: filter sheet or aluminum foil
21 : 압력강하용 오리피스21: pressure drop orifice
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