WO2008056444A1 - Procédé de mesure de la poussière et dispositif de mesure de la poussière - Google Patents

Procédé de mesure de la poussière et dispositif de mesure de la poussière Download PDF

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Publication number
WO2008056444A1
WO2008056444A1 PCT/JP2007/001210 JP2007001210W WO2008056444A1 WO 2008056444 A1 WO2008056444 A1 WO 2008056444A1 JP 2007001210 W JP2007001210 W JP 2007001210W WO 2008056444 A1 WO2008056444 A1 WO 2008056444A1
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WO
WIPO (PCT)
Prior art keywords
image
dust
vitiligo
dust measuring
tunnel
Prior art date
Application number
PCT/JP2007/001210
Other languages
English (en)
Japanese (ja)
Inventor
Masato Shinji
Original Assignee
Yamaguchi University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yamaguchi University filed Critical Yamaguchi University
Priority to JP2008542992A priority Critical patent/JP5207185B2/ja
Publication of WO2008056444A1 publication Critical patent/WO2008056444A1/fr

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Classifications

    • 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
    • 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
    • G01N15/075—Investigating concentration of particle suspensions by optical means

Definitions

  • the present invention relates to a method and apparatus for measuring fine particle dust by a simple method.
  • it relates to a method for measuring dust generated during work such as excavation, pile-up, piercing, and shotcrete at tunnel construction sites.
  • a tunnel is a closed space, and cement mortar sprayed by a spraying method to reinforce the space together with dust from excavation is scattered due to collision between natural ground and mortar particles. Since the fine particles are scattered in the tunnel, the working environment is poor.
  • the spatial intensity distribution of diffracted / scattered light generated by irradiating laser particles to a measured particle group in a dispersed state was measured.
  • a so-called laser diffraction / scattering type particle size distribution measuring device that converts a particle size distribution of a particle group to be measured based on the scattering theory.
  • the liquid phase method in which the measurement particles are dispersed in a liquid to form a suspension, and the measurement particles are dispersed in a gas.
  • a gas phase method to make aerosol For dust measurement in industries that do not like dust, such as the semiconductor industry, place the projector and receiver perpendicularly to the gas flow, cross the light, measure the amount of light transmitted by the dust, and measure the dust concentration. Is associated.
  • Patent Document 1 Japanese Patent Laid-Open No. 2 0 06 _ 1 0 5 14
  • Patent Document 2 Japanese Patent Laid-Open No. 1 1-2 6 4 7 9 6
  • Patent Document 3 Japanese Patent Laid-Open No. 9-2 4 3 5 4 7
  • the present invention makes it possible to easily measure dust using not only a tunnel construction site but also a portable photographing device such as a digital camera.
  • the particle size of the fine particles is estimated by measuring the brightness of the vitiligo image.
  • the fine particles are considered to be present almost uniformly in the space, and a vitiligo image is taken based on the reflection from the fine particles within a certain distance from the imaging device, so the number of vitiligo images in the image is reduced. It is possible to estimate the dust concentration by measuring. Fine particles photographed as vitiligo images are present in the vicinity of the camera lens, and as the distance from the lens to the fine particles increases, the reflected light does not reach the force lens, so the vitiligo image is not photographed. The limit distance when shooting with a light-powered strobe is about 50 mm from the camera lens. Vitiligo images are captured by many digital cameras when taken with autofocus.
  • the reflected light of fine particles can be captured as an image within about 5 O mm from the lens, so if you set the focal length of the imaging device within 5 O mm, This eliminates the reflection of the background, makes it easy to identify the vitiligo image, and makes the count of countless.
  • the background of the shooting location is white, the vitiligo image based on the reflected light from the fine particles will be masked, so care should be taken to make the background black during shooting.
  • the photographing device is for a color image
  • image processing such as monochrome processing, edge enhancement processing, color reduction processing, and reversal processing to improve measurement accuracy.
  • the digital camera has a monochrome shooting mode, that function may be used.
  • FIG. 1 Images taken with and without flashing in the tunnel.
  • FIG.2 Image of a digital camera taken with hexagonal white spots.
  • FIG. 5 is a block diagram of the dust measuring apparatus of the present invention. Explanation of symbols
  • the image on the right side of Fig. 1 is an image of the tunnel under construction using a digital compact camera.
  • the digital camera was set to autofocus, and the flash was flashed using the built-in flash. Many flashes of white circular images were taken in various sizes, with flash reflected on cement particles suspended in the air.
  • the image on the left side of Fig. 1 shows the case where no strobe is used, and since no reflected light is generated from the fine particles, the white circular image that appears when using the strut is not taken.
  • the image in Fig. 1 is obtained by performing monochrome processing on the photographed color image and performing black-and-white reversal processing so as to identify vitiligo, and the white circular image is shown as a circular gray image. . If the digital camera itself has a monochrome shooting mode, you can use that function.
  • Fig. 3 (2) is a photo taken with the digital camera at the same time and using a stroboscope at almost the same time
  • Fig. 3 (3) is an autofocus without stroboscope. It was taken.
  • Light is emitted from the work vehicle's headlight ⁇ and the work lighting in the center of the screen, but when the macro mode shown in Fig. 3 (1) is selected, Is taken in dark, the work drips ⁇ of the work vehicle are taken as a circular image, and the front and left work vehicles appearing in Fig. 3 (2) are not photographed, and the background is black.
  • FIG. 4 shows a graph of the results of sucking a certain amount of gas in the tunnel, collecting the dust contained in it with a filter, obtaining a sample, photographing with an electron microscope, counting the dust, and examining the particle size and number. Shown in As can be seen from the table in Fig. 4, dust exceeding 10 m was rare and most was 2 m. From this, it can be said that even if the particle size of the dust is about 2 m, it can be measured by the present invention.
  • FIG. 5 is a block diagram of an example of a dust measuring device based on the method of the present invention.
  • the reference value changing means 5 is provided so that the reference range can be changed as appropriate.
  • the present invention is useful because it can easily measure the concentration of dust in a dark place such as a tunnel using a portable imaging device.
  • the photographer When shooting with a digital camera, the photographer normally holds the camera at eye level and can easily measure the dust concentration in areas where workers are highly likely to suck. The image can be easily analyzed with a computer to calculate the density.
  • the ventilation can be strengthened.
  • the environment can be improved, so that workers can work in a good working environment.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

La présente invention concerne un procédé de mesure de concentration de la poussière, par exemple, dans un tunnel qui est simplement mesurée au moyen d'un dispositif de formation d'images portatif. Lors de la formation d'image de l'espace dans un tunnel au moyen d'un stroboscope d'une caméra numérique, le flash provenant du stroboscope est réfléchi par des particules en suspension dans l'air. La lumière réfléchie est capturée et une image de point blanc est capturée. Grâce au décompte de points blancs, la concentration de poussière peut être estimée. Le dispositif de mesure de poussière comporte un moyen d'extraction de points blancs dans une image pour extraire les points dans une image, un moyen de calcul de zones pour calculer la zone des points blancs dans l'image, un moyen de comparaison pour déterminer si la valeur calculée par le moyen de calcul de zones se trouve ou non à l'intérieur d'une région prédéterminée, un moyen de décompte du nombre de points blancs dans la région prédéterminée, et un moyen d'affichage pour afficher le résultat du décompte.
PCT/JP2007/001210 2006-11-06 2007-11-06 Procédé de mesure de la poussière et dispositif de mesure de la poussière WO2008056444A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008542992A JP5207185B2 (ja) 2006-11-06 2007-11-06 粉塵測定方法及び粉塵測定装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006299946 2006-11-06
JP2006-299946 2006-11-06

Publications (1)

Publication Number Publication Date
WO2008056444A1 true WO2008056444A1 (fr) 2008-05-15

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Application Number Title Priority Date Filing Date
PCT/JP2007/001210 WO2008056444A1 (fr) 2006-11-06 2007-11-06 Procédé de mesure de la poussière et dispositif de mesure de la poussière

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JP (1) JP5207185B2 (fr)
WO (1) WO2008056444A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102410975A (zh) * 2011-12-06 2012-04-11 青岛海纳光电环保有限公司 风洞式烟尘浓度发生校准装置
CN102445409A (zh) * 2011-09-28 2012-05-09 中国农业大学 一种基于数字图像技术的粉尘浓度测量装置及方法
JP2014048203A (ja) * 2012-08-31 2014-03-17 Yamaguchi Univ 微粒子の濃度測定方法及び測定装置
KR101723073B1 (ko) * 2016-09-01 2017-04-05 (주)오션네트웍스 미세먼지농도 측정장치 및 미세먼지농도 측정시스템
CN110031371A (zh) * 2019-04-29 2019-07-19 李旭 一种建筑工程用的环境监测装置
EP3903091A4 (fr) * 2018-12-24 2022-10-05 Mobile Physics Ltd. Détermination d'une densité particulaire en suspension dans l'air à l'aide d'un équipement utilisateur standard

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH0495757A (ja) * 1990-08-08 1992-03-27 Ono Gijutsu Kenkyusho:Kk 粉塵撮影装置
JPH0649988U (ja) * 1992-11-10 1994-07-08 株式会社浅沼カメラメカニカルラボラトリー 粉塵の写真撮影装置
JPH08117533A (ja) * 1994-10-24 1996-05-14 Tokyo Koutetsu Kk 集塵装置
JP2003302333A (ja) * 2002-04-10 2003-10-24 Shin Nippon Air Technol Co Ltd ダクト内汚染の診断方法およびダクト清掃効果の簡易評価方法

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
JP2003083868A (ja) * 2001-09-11 2003-03-19 Nkk Corp 粒度分布測定方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0495757A (ja) * 1990-08-08 1992-03-27 Ono Gijutsu Kenkyusho:Kk 粉塵撮影装置
JPH0649988U (ja) * 1992-11-10 1994-07-08 株式会社浅沼カメラメカニカルラボラトリー 粉塵の写真撮影装置
JPH08117533A (ja) * 1994-10-24 1996-05-14 Tokyo Koutetsu Kk 集塵装置
JP2003302333A (ja) * 2002-04-10 2003-10-24 Shin Nippon Air Technol Co Ltd ダクト内汚染の診断方法およびダクト清掃効果の簡易評価方法

Non-Patent Citations (1)

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Title
NOMURA E.: "Kukichu no Fuyu Funjin o Satsuei", SHASHIN KOGYO, vol. 51, no. 3, March 1993 (1993-03-01), pages 76 - 80 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445409A (zh) * 2011-09-28 2012-05-09 中国农业大学 一种基于数字图像技术的粉尘浓度测量装置及方法
CN102410975A (zh) * 2011-12-06 2012-04-11 青岛海纳光电环保有限公司 风洞式烟尘浓度发生校准装置
JP2014048203A (ja) * 2012-08-31 2014-03-17 Yamaguchi Univ 微粒子の濃度測定方法及び測定装置
KR101723073B1 (ko) * 2016-09-01 2017-04-05 (주)오션네트웍스 미세먼지농도 측정장치 및 미세먼지농도 측정시스템
EP3903091A4 (fr) * 2018-12-24 2022-10-05 Mobile Physics Ltd. Détermination d'une densité particulaire en suspension dans l'air à l'aide d'un équipement utilisateur standard
US11921024B2 (en) 2018-12-24 2024-03-05 Mobile Physics Ltd. Airborne particulate density determination using standard user equipment
CN110031371A (zh) * 2019-04-29 2019-07-19 李旭 一种建筑工程用的环境监测装置
CN110031371B (zh) * 2019-04-29 2022-05-06 李旭 一种建筑工程用的环境监测装置

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JP5207185B2 (ja) 2013-06-12
JPWO2008056444A1 (ja) 2010-02-25

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