JP2005181169A - Apparatus for measuring particle size distribution, and method - Google Patents
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- 238000009826 distribution Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005286 illumination Methods 0.000 claims abstract description 53
- 239000003245 coal Substances 0.000 claims abstract description 45
- 238000003384 imaging method Methods 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000008187 granular material Substances 0.000 claims description 12
- 238000005259 measurement Methods 0.000 description 13
- 239000000571 coke Substances 0.000 description 10
- 238000007415 particle size distribution analysis Methods 0.000 description 7
- 238000007873 sieving Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
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- 238000003908 quality control method Methods 0.000 description 1
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Abstract
Description
本発明は、移動中の粉粒体の粒度分布を画像処理を用いて計測する粒度分布計測装置および方法に関するものであり、特にコークス製造における石炭の粒度分布計測装置および方法に関するものである。 The present invention relates to a particle size distribution measuring apparatus and method for measuring the particle size distribution of moving powder using image processing, and more particularly to a coal particle size distribution measuring apparatus and method in coke production.
粉粒体の粒度分布を計測することは、粉粒体の製造工程では粉粒体の品質管理上、極めて重要である。例えば、石炭を乾留してコークスを製造する工程は、原料（石炭）荷役貯蔵、石炭処理、乾留、コークス処理および化成品処理の各工程より成り立っている。原料（石炭）荷役貯蔵工程では、船舶等で入荷された石炭は、アンローダにより荷揚げされた後、ベルトコンベアで輸送され、スタッカーにより貯炭場に積み付けられる。次の石炭処理工程は、良質コークスが得られるように各種銘柄の石炭を適量に配合し、それらを最適な粒度に粉砕する工程である。先の貯炭場に貯炭されていた石炭は、払い出し設備すなわちローダーなどで払い出され、さらにコンベアで配合槽まで送炭されて各銘柄別に貯蔵される。配合槽に貯蔵される石炭は、石炭の流動性、不活性物質の多少、硬さ、粒度などの炭質を十分考慮して、各銘柄別に配合される。 Measuring the particle size distribution of the granular material is extremely important in the quality control of the granular material in the production process of the granular material. For example, the process of producing coke by dry distillation of coal consists of raw material (coal) cargo handling storage, coal treatment, dry distillation, coke treatment, and chemical product treatment. In the raw material (coal) cargo handling and storage process, coal received by a ship or the like is unloaded by an unloader, transported by a belt conveyor, and loaded on a coal storage by a stacker. The next coal treatment step is a step of blending various brands of coal in an appropriate amount so as to obtain high-quality coke and pulverizing them to an optimum particle size. Coal stored in the previous coal storage yard is discharged by a discharge facility, that is, a loader, and further transferred to a mixing tank by a conveyor and stored for each brand. The coal stored in the blending tank is blended for each brand, taking into account the coal fluidity, the amount of inert substances, the hardness, the particle size, and the like.
通常、原料炭として入荷する石炭は、粉状の粉炭であるが、その粒度は、銘柄によって相当に異なっている。とくに不活性物質の石炭は、コークス化性の観点からできる限り細かくすることが好ましく、細かくすることによりコークス強度の向上が期待できる。しかしながら一方では、必要以上に細粒化すると、コークス炉に装入する段階で嵩密度低下をおこし、生産性低下の原因となるとともに、装入作業時の粉塵飛散やコークス炉窯内でのカーボン付着トラブルをひきおこす等の問題点もある。 Normally, coal that arrives as raw coal is pulverized pulverized coal, but its particle size varies considerably depending on the brand. In particular, the inert material coal is preferably made as fine as possible from the viewpoint of coking properties, and an improvement in coke strength can be expected by making it fine. However, on the other hand, if the particle size is reduced more than necessary, the bulk density will be reduced at the stage of charging into the coke oven, which will lead to a reduction in productivity, dust scattering during charging operations, and carbon in the coke oven kiln. There are also problems such as causing adhesion problems.
そこで、互いに相反する要求に対して、両者を満足させる最適な粒度範囲を見出す必要がある。通常、３ｍｍ粒径以下のものが、全体の８０％前後を占めるような粒度分布になるように操業管理している。具体的には、配合された石炭の粒度分布を計測し、この計測結果に基づき粉砕機の制御を行っている。 Therefore, it is necessary to find an optimum particle size range that satisfies both requirements against each other. Usually, the operation is managed so that the particle size distribution is such that the particle size of 3 mm or less occupies around 80% of the whole. Specifically, the particle size distribution of the blended coal is measured, and the crusher is controlled based on the measurement result.
このように、コークスの製造工程では、石炭の粒度分布を計測することが操業管理上重要である。従来からの石炭粒度分布の代表的な計測方法として、石炭をサンプリング採取し、乾燥後に粒径別に篩い分け、秤量することにより粒度分布を求める、いわゆる篩い分け法がある。通常、この篩い分け法は、手篩または手分析と呼ばれる作業を人手で行うものと、ロボットと呼ばれるサンプリングから粒度分布分析まで自動で行なうものに分けられ、工場の操業管理に広く用いられている。 Thus, in the coke production process, it is important for operation management to measure the particle size distribution of coal. As a typical method for measuring the particle size distribution of coal from the past, there is a so-called sieving method in which coal is sampled, dried and sieved according to particle size, and the particle size distribution is obtained by weighing. Usually, this sieving method is divided into two types: manual sieving or manual analysis, which is performed manually from robotic sampling to particle size distribution analysis, and is widely used for factory operation management. .
この方法を用いることにより、精度良く粒度分布を求めることができるものの、バッチ計測であるという計測頻度の制約（1日に数回程度）から、その結果を用いてリアルタイムに石炭粒度分布管理・粉砕機の回転数制御を行うことは困難であるとともに、自動で行なうロボット装置自体も高価であるという問題があった。 By using this method, the particle size distribution can be obtained with high accuracy, but because of the measurement frequency limitation of batch measurement (several times a day), the particle size distribution management / pulverization is performed in real time using the results. It is difficult to control the rotational speed of the machine, and there is a problem that the robot apparatus itself that is automatically performed is expensive.
そこで、リアルタイムで粒度分布管理を行える画像解析による粒度分布計測方法の開発が行われてきた。ＣＣＤカメラ等により撮像された石炭画像から画像処理技術により粒度分布を求める方法が考案された。画像処理による粒度分布計測方法の一例として、特開昭６０−１４６１３１号公報（特許文献１）では、粒状物質をブロアにより飛散させ、飛散状態を画像としてとりこむ方法が開示されている。また、特開平５−２３１８２１号公報（特許文献２）では、篩いで細粒を分離後に落下するコークスを撮像する方法が開示されている。さらに、撮像画像の精度を向上させる方法として、特開２００２−２２１４８１号公報（特許文献３）では、移動中の物体表面と撮像装置との距離を一定にさせる方法が開示されている。
しかしながら、特許文献１ないし特許文献３で示される方法は、いずれも移動中の粉粒体をＣＣＤカメラ等の撮像装置により画像として撮像するものであり、カメラのシャッターが開いている間、粉粒体が移動するため撮像される画像は横流れとなり、ぼやけた画像となる。このため、撮像画像の鮮明度が悪くなり、精度の良い粒度分布計測ができないという問題点がある。 However, all of the methods shown in Patent Documents 1 to 3 capture moving particles as an image by an imaging device such as a CCD camera, and while the camera shutter is open, the particles Since the body moves, the captured image becomes a lateral flow and becomes a blurred image. For this reason, there is a problem that the sharpness of the captured image is deteriorated and the particle size distribution cannot be accurately measured.
本発明は上記事情に鑑みてなされたもので、粉粒体の粒度分布を画像処理により計測する方法であって、精度の高い粒度分布計測装置および方法を提供することにある。 The present invention has been made in view of the above circumstances, and is to provide a highly accurate particle size distribution measuring apparatus and method for measuring the particle size distribution of a granular material by image processing.
本発明は、搬送体に載せられて移動中の粉粒体を撮像装置により撮像し、画像処理によりその粒度分布を計測する装置において、前記粉粒体の撮像照明を行う閃光照明装置と、該閃光照明装置と前記撮像装置とを制御する制御装置と、撮像された画像を画像処理し粒度分布解析する粒度分布解析装置とを有することを特徴とする粒度分布計測装置である。 The present invention relates to a flash illumination device that performs imaging illumination of the granular material in an apparatus that captures an image of the moving granular material mounted on a carrier by an imaging device and measures the particle size distribution by image processing, A particle size distribution measuring apparatus comprising: a control device that controls a flash illumination device and the imaging device; and a particle size distribution analyzing device that performs image processing on a captured image and performs particle size distribution analysis.
また本発明は、請求項１に記載の粒度分布計測装置において、前記閃光照明装置は、前記撮像装置のシャッター開放時間より短い発光時間を有しており、前記制御装置は、前記撮像装置のシャッター開放時間内に前記閃光照明装置を発光させるように、前記閃光照明装置と前記撮像装置とを制御することを特徴とする粒度分布計測装置である。 Further, the present invention provides the particle size distribution measuring device according to claim 1, wherein the flash illumination device has a light emission time shorter than a shutter opening time of the imaging device, and the control device is a shutter of the imaging device. The particle size distribution measuring apparatus is characterized in that the flash illumination device and the imaging device are controlled so that the flash illumination device emits light within an open time.
また本発明は、請求項１または請求項２のいずれかに記載の粒度分布計測装置において、前記粉粒体は、石炭であることを特徴とする粒度分布計測装置である。 Moreover, this invention is a particle size distribution measuring apparatus in any one of Claim 1 or Claim 2, The said granular material is coal, It is a particle size distribution measuring apparatus characterized by the above-mentioned.
さらに本発明は、搬送体に載せられて移動中の粉粒体を撮像し、画像処理によりその粒度分布を計測する方法において、撮像装置のシャッター開放時間より短い発光時間を有する閃光照明装置を用いて、シャッター開放時間内に発光させることによって前記粉粒体の画像を撮ることを特徴とする粒度分布計測方法である。 Furthermore, the present invention uses a flash illumination device having a light emission time shorter than a shutter opening time of an image pickup device in a method for picking up an image of a moving powder particle placed on a carrier and measuring the particle size distribution by image processing. The particle size distribution measuring method is characterized in that an image of the granular material is taken by emitting light within the shutter opening time.
本発明によれば、粉粒体の撮像画像が鮮明になり、この画像を用いた粒度分布解析結果の精度向上ができるとともに、この結果を用いたリアルタイムな石炭粉砕機の制御ができ品質の向上、さらに高価なロボット装置の代替による計測装置の設置費用削減といった操業上の効果が実現できる。 According to the present invention, the captured image of the granular material becomes clear, the accuracy of the particle size distribution analysis result using the image can be improved, and the quality of the coal pulverizer can be controlled in real time using the result. In addition, operational effects such as a reduction in the installation cost of the measuring device by replacing an expensive robot device can be realized.
以下、本発明を実施するための最良の形態について、図面を用いて説明する。図１は、粒度分布計測装置の構成の一例を示す図である。図中、１はＣＣＤカメラ、２は閃光照明、３は閃光照明用電源、４は粒度分布解析装置、５は制御装置、６は石炭、および７はベルトコンベアをそれぞれ示している。本粒度分布計測装置は、ベルトコンベア７上の石炭５を撮像するＣＣＤカメラ１、撮像照明を行う閃光照明装置２、この閃光照明装置２用の閃光照明用電源３、画像撮像と閃光照明起動タイミングを制御する制御装置５、および撮像された石炭画像を収集し粒度分布解析を行う粒度分布解析装置４で構成されている。 Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an example of the configuration of a particle size distribution measuring apparatus. In the figure, 1 is a CCD camera, 2 is flash illumination, 3 is a power source for flash illumination, 4 is a particle size distribution analyzer, 5 is a control device, 6 is coal, and 7 is a belt conveyor. This particle size distribution measuring apparatus includes a CCD camera 1 that captures an image of coal 5 on a belt conveyor 7, a flash illumination device 2 that performs imaging illumination, a flash illumination power source 3 for the flash illumination device 2, image capturing and flash illumination activation timing. And a particle size distribution analyzer 4 that collects captured coal images and performs particle size distribution analysis.
閃光照明２の発光時間は、1回の発光での光量の発光半値幅で規定される。図２は、この発光半値幅を説明する図である。横軸に時間、縦軸に発光強度をとり、閃光照明の発光波形を模式的に表わしている。発光半値幅は、発光波形の最大発光強度を１００％とし、発光し始めて５０％の発光強度に達する時点から再び５０％の発光強度に戻る時点までの時間ｔで表わし、通常数μsの値である。 The light emission time of the flashlight 2 is defined by the light emission half-value width of the light amount in one light emission. FIG. 2 is a diagram for explaining the half width of light emission. The horizontal axis represents time, and the vertical axis represents emission intensity, and the emission waveform of flash illumination is schematically represented. The half width of light emission is represented by the time t from the time when the maximum light emission intensity of the light emission waveform is 100% to the time when the light emission intensity reaches 50% after the light emission starts to return to the time when the light emission intensity returns to 50% again. is there.
例えば、石炭の搬送体であるベルトコンベアの速度が８０ｍ／ｍｉｎでＣＣＤカメラのシャッター速度を１ｍｓで撮像を行なった場合、画像を撮像する間にベルトコンベアおよび石炭粒子は１．３ｍｍ移動していることになる。しかし、閃光照明の発光半値幅を５μsで撮像を行なった場合は、ＣＣＤカメラのシャッター速度に影響されることなく、閃光照明が発光している間の画像が撮像される。この閃光照明が発光している間すなわち発光半値幅５μsの間、ベルトコンベアは０．００６ｍｍだけしか移動していないため、ＣＣＤカメラのシャッター速度に影響されることなく、撮像画像は鮮明になる。このため、この画像を用いた石炭粒度分布計測結果の精度向上が可能となる。閃光照明の据付方法は、良好な陰影が得られるように、原料面に対して４５°の角度で設置することが好ましい。 For example, when the speed of a belt conveyor which is a coal carrier is 80 m / min and the shutter speed of a CCD camera is taken at 1 ms, the belt conveyor and the coal particles move 1.3 mm while the image is taken. It will be. However, when imaging is performed with a light emission half-value width of 5 μs, images are captured while the flash illumination is emitted without being affected by the shutter speed of the CCD camera. While the flash illumination is emitted, that is, during the light emission half width of 5 μs, the belt conveyor moves only by 0.006 mm, so that the captured image becomes clear without being affected by the shutter speed of the CCD camera. For this reason, the accuracy of the coal particle size distribution measurement result using this image can be improved. The installation method of the flash illumination is preferably installed at an angle of 45 ° with respect to the raw material surface so that a good shadow can be obtained.
ベルトコンベア７上の石炭がＣＣＤカメラ下部に搬送された時に、ＣＣＤカメラ１による画像撮像および閃光照明２の同時起動を、制御装置５により可能にしている。このようにして撮像された石炭画像は、粒度分布解析を行なう粒度分布解析装置４へ取り込まれ、粒度分布解析を行ない、解析結果を表示する。 When the coal on the belt conveyor 7 is conveyed to the lower part of the CCD camera, the control device 5 enables the image pickup by the CCD camera 1 and the simultaneous activation of the flash illumination 2. The coal image picked up in this way is taken into the particle size distribution analyzer 4 that performs particle size distribution analysis, performs the particle size distribution analysis, and displays the analysis result.
図３は、画像処理による粒度分布計測の処理フローを示す。ベルトコンベア上の石炭の画像をＣＣＤカメラにて撮像し、粒度分布解析装置に転送する。粒度分布解析装置は、画像入力、輝度むら除去、２値化を行ない、撮像粒子の２値化画像を得る。次に、２値化画像内の石炭粒子すべてについて各々の面積を算出し、全粒子の各々の面積から重量換算することにより粒度分布を算出する。さらに、この算出した粒度分布を、プロセス計算機（（図示せず）にデータ転送し、データの蓄積・画面表示を行うと共に、粉砕機等への制御指令に用いることもできる。 FIG. 3 shows a processing flow of particle size distribution measurement by image processing. An image of coal on the belt conveyor is taken by a CCD camera and transferred to a particle size distribution analyzer. The particle size distribution analyzer performs image input, luminance unevenness removal, and binarization to obtain a binarized image of the imaged particles. Next, the area of each coal particle in the binarized image is calculated, and the particle size distribution is calculated by weight conversion from the area of all the particles. Further, the calculated particle size distribution can be transferred to a process computer (not shown) to accumulate data and display a screen, and can also be used for a control command to a pulverizer or the like.
上記本発明により撮像された画像と連続照明下で撮像された画像の比較の一例を、図４に示す。閃光照明（a）と連続照明（b）とで全く同じ対象で撮像できていないため、対象画像の違いはあるものの、閃光照明（a）で撮像された画像がより鮮明に撮像されていることが図の下部の画像比較により分かる。また、図の上部には、下部の画像に示した横線上すなわち画像横方向での各々の輝度レベルの変化を表わしている。この輝度レベルを比較すると、閃光照明で撮像された画像の方が鮮明化されている分だけ陰影の差が大きく出ているため、これが輝度レベルの大きな変化として表れている。そして、信号としては、閃光照明（a）の方がより高周波成分の多い信号であることが確認できる。 FIG. 4 shows an example of a comparison between an image captured by the present invention and an image captured under continuous illumination. Because the flash illumination (a) and the continuous illumination (b) cannot be captured with the same target, the images captured with the flash illumination (a) are captured more clearly, although there are differences in the target images. Can be seen by image comparison at the bottom of the figure. In the upper part of the figure, each luminance level change on the horizontal line shown in the lower image, that is, in the horizontal direction of the image is shown. When this brightness level is compared, since the difference in shadow is larger as the image captured with flash illumination is sharper, this appears as a large change in the brightness level. As a signal, it can be confirmed that the flash illumination (a) has a higher frequency component.
同様に、閃光照明および連続照明下での撮像された石炭画像を２値化処理した後の画像比較を、図５に示す。図５（a）は、閃光照明を用いた場合であり、図５（ｂ）は、連続照明を用いた場合であり、それぞれ左側に元画像、右側に２値化処理した後の画像を示している。閃光照明、連続照明で対象画像の違いはあるが、閃光照明で撮像された石炭画像を用いて２値化処理した画像の方が、撮像画像が鮮明化されているため、より細かい石炭粒子を捉えることが可能となっている。さらに、この処理画像をもとに石炭粒子として判断した粒子数の比較を行なっても、閃光照明の場合は２３１個、連続照明の場合は１３３個と、閃光照明の方が約１．７倍より多くの石炭粒子を認識できている。 Similarly, FIG. 5 shows an image comparison after binarizing the captured coal image under flash illumination and continuous illumination. FIG. 5A shows the case where flash illumination is used, and FIG. 5B shows the case where continuous illumination is used, showing the original image on the left side and the image after binarization processing on the right side, respectively. ing. Although there is a difference in the target image between flash illumination and continuous illumination, the image binarized using the coal image captured with flash illumination has a sharper captured image. It is possible to capture. Furthermore, even if the number of particles determined as coal particles based on this processed image is compared, 231 in the case of flash illumination and 133 in the case of continuous illumination, which is approximately 1.7 times that of flash illumination. More coal particles can be recognized.
図６に、最終的な粒度分布計測結果の一例を示す。本発明による粒度分布計測結果（a）と連続照明を用いた粒度分布計測結果（b）を並べて示している。３ｍｍ粒径以下のものが、全体に占める重量割合を粒度分布解析しており、背景技術で述べたサンプリングし、篩い分け・秤量による粒度分布計測結果（実測値）とそれぞれ比較している。連続照明と閃光照明では、実測値との相関に大きな差異が見て取れる。閃光照明を用いて鮮明化された画像を粒度分布解析することで、高精度であるとしてこれまで用いられてきた篩い分け・秤量方法による実測値と本発明による計測値との間に高い相関、すなわち本発明により高い精度での粒度分布計測が可能であることが分かる。これまで、画像処理を用いた粒度分布計測方法は、経時的な粒度分布変化の傾向を診るため、すなわち従来の篩い分け法の補完的な計測方法として用いられてきたが、本発明により従来の篩い分け法の代替も可能である。このことにより、高価なロボット装置の代替による計測装置の設置費用削減や、リアルタイムに石炭粉砕機の制御ができ品質の向上といった操業上の大きな効果も実現できる。 FIG. 6 shows an example of the final particle size distribution measurement result. The particle size distribution measurement result (a) according to the present invention and the particle size distribution measurement result (b) using continuous illumination are shown side by side. Particles with a particle size of 3 mm or less are subjected to particle size distribution analysis of the weight ratio of the total, sampled as described in the background art, and compared with particle size distribution measurement results (actual measurement values) by sieving and weighing, respectively. In continuous illumination and flash illumination, a large difference can be seen in the correlation with measured values. By analyzing the particle size distribution of a sharpened image using flash illumination, a high correlation between the measured value according to the present invention and the measured value by the sieving / weighing method that has been used so far as being highly accurate, That is, it can be seen that the present invention can measure particle size distribution with high accuracy. Until now, the particle size distribution measurement method using image processing has been used as a complementary measurement method of the conventional sieving method in order to examine the tendency of the particle size distribution change over time. An alternative to sieving is also possible. As a result, it is possible to realize significant operational effects such as reduction in installation cost of a measuring device by replacing an expensive robot device, and control of a coal pulverizer in real time and improvement in quality.
なお、本発明の粒度分布計測装置における粒度分布計測の適用対象はこれまで説明した石炭とは別に、鉱石、石灰石、コークス、プラスチック粉、トナーなどの各種粉粒体にも適用することが可能である。 In addition, the application object of the particle size distribution measurement in the particle size distribution measuring device of the present invention can be applied to various powder particles such as ore, limestone, coke, plastic powder, toner, etc., apart from the coal described so far. is there.
１ ＣＣＤカメラ
２ 閃光照明
３ 閃光照明用電源
４ 粒度分布解析装置
５ 制御装置
６ 石炭
７ ベルトコンベア
DESCRIPTION OF SYMBOLS 1 CCD camera 2 Flash illumination 3 Power supply for flash illumination 4 Particle size distribution analyzer 5 Control device 6 Coal 7 Belt conveyor
Claims (4)
前記粉粒体の撮像照明を行う閃光照明装置と、
該閃光照明装置と前記撮像装置とを制御する制御装置と、
撮像された画像を画像処理し粒度分布解析する粒度分布解析装置とを有することを特徴とする粒度分布計測装置。 In an apparatus for capturing powder particles moving on a carrier by an imaging device and measuring the particle size distribution by image processing,
A flash illumination device for performing imaging illumination of the powder particles;
A control device for controlling the flash illumination device and the imaging device;
A particle size distribution measuring apparatus comprising: a particle size distribution analyzing apparatus that performs image processing on a captured image and analyzing the particle size distribution.
前記閃光照明装置は、前記撮像装置のシャッター開放時間より短い発光時間を有しており、
前記制御装置は、前記撮像装置のシャッター開放時間内に前記閃光照明装置を発光させるように、前記閃光照明装置と前記撮像装置とを制御することを特徴とする粒度分布計測装置。 In the particle size distribution measuring apparatus according to claim 1,
The flash illumination device has a light emission time shorter than the shutter opening time of the imaging device,
The particle size distribution measuring apparatus, wherein the control device controls the flash illumination device and the imaging device so that the flash illumination device emits light within a shutter opening time of the imaging device.
前記粉粒体は、石炭であることを特徴とする粒度分布計測装置。 In the particle size distribution measuring apparatus according to claim 1 or 2,
The particle size distribution measuring apparatus, wherein the granular material is coal.
撮像装置のシャッター開放時間より短い発光時間を有する閃光照明装置を用いて、
シャッター開放時間内に発光させることによって前記粉粒体の画像を撮ることを特徴とする粒度分布計測方法。 In the method of imaging the granular material moving on the carrier, and measuring the particle size distribution by image processing,
Using a flash illumination device having a light emission time shorter than the shutter opening time of the imaging device,
A particle size distribution measuring method, wherein an image of the granular material is taken by emitting light within a shutter opening time.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101249045B1 (en) | 2010-12-28 | 2013-03-29 | 주식회사 포스코 | Measuring device for size lump |
| CN103364315A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | On-line detection method and detection device for particle size of sintered solid fuel |
| KR20180073117A (en) * | 2016-12-22 | 2018-07-02 | 주식회사 포스코 | Apparatus for measuring size of transferred raw material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101249045B1 (en) | 2010-12-28 | 2013-03-29 | 주식회사 포스코 | Measuring device for size lump |
| CN103364315A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | On-line detection method and detection device for particle size of sintered solid fuel |
| CN103364315B (en) * | 2012-03-30 | 2016-04-06 | 鞍钢股份有限公司 | On-line detection method and detection device for particle size of sintered solid fuel |
| KR20180073117A (en) * | 2016-12-22 | 2018-07-02 | 주식회사 포스코 | Apparatus for measuring size of transferred raw material |
| KR101879087B1 (en) * | 2016-12-22 | 2018-07-16 | 주식회사 포스코 | Apparatus for measuring size of transferred raw material |
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