JP3095839B2 - Powder detector - Google Patents
Powder detectorInfo
- Publication number
- JP3095839B2 JP3095839B2 JP03334427A JP33442791A JP3095839B2 JP 3095839 B2 JP3095839 B2 JP 3095839B2 JP 03334427 A JP03334427 A JP 03334427A JP 33442791 A JP33442791 A JP 33442791A JP 3095839 B2 JP3095839 B2 JP 3095839B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- light
- transparent tube
- tube
- mirror surface
- 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.)
- Expired - Fee Related
Links
- 239000000843 powder Substances 0.000 title claims description 44
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000001883 metal evaporation Methods 0.000 claims 1
- 239000006185 dispersion Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は管の中を気流に乗って流
れている粉体の分散状況を検出する装置、特に分散して
いる粉体の中で塊状になっている粉体を検出する装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the state of dispersion of powder flowing in an air stream in a pipe, and more particularly, to detecting a lump of powder in the dispersed powder. To a device that
【０００２】[0002]
【従来技術】例えばセラミックスの表面に粉体を塗布す
る場合に、各粉体の粒子を完全に均一に分布させること
が必要である。そのためには粉体を気流中に均等に分散
した状態で作業点まで輸送する必要がある。2. Description of the Related Art For example, when powder is applied to the surface of ceramics, it is necessary to completely and uniformly distribute particles of each powder. For this purpose, it is necessary to transport the powder to the working point in a state of being uniformly dispersed in the air stream.
【０００３】従来、管内を流動する粉体の分散状況を検
出する方法は各種あるが、その中の一つの方法として、
光の透過を利用する方法がある。この方法は粉体を輸送
する管に透明な管を使用するか、または不透明な管を使
用した場合はその一部分に透明な部分を設け、この透明
部分の外側に光源と該光源から出る光を受光する受光部
とを管の直径方向に向かい合わせて配置し、該管内を気
流に乗って流れる粉体の分散状況により前記光が遮断さ
れる状況の変化を電気信号として取り出すものである。Conventionally, there are various methods for detecting the state of dispersion of powder flowing in a tube. One of the methods is as follows.
There is a method using light transmission. In this method, a transparent tube is used as a tube for transporting powder, or a transparent portion is provided in a part of an opaque tube, and a light source and light emitted from the light source are provided outside the transparent portion. A light-receiving portion for receiving light is disposed so as to face the diameter direction of the tube, and a change in a state where the light is blocked due to a dispersion state of the powder flowing in the tube along with an air current is extracted as an electric signal.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、この方
法による場合、流動中の粉体と光の接触が１回通過（ワ
ンパス）であり、しかも細管のため接触距離が短いため
粉体の状況を正確に表示する信号を得ることが困難であ
る。特に、粉体給送管の直径が細くなればなるほど、ま
た気流の速度したがって粉体の移動速度が速くなればな
るほど、前記信号は不正確となる。したがって、従来は
粉体が均等に分散された状態で輸送されているか否か
は、出来上がった製品を見ることによって確かめる方法
しかなかった。However, according to this method, the contact between the flowing powder and light is made once (one pass), and since the contact distance is short because of the thin tube, the state of the powder can be accurately determined. It is difficult to obtain a signal to be displayed on the screen. In particular, the smaller the diameter of the powder feed tube and the higher the speed of the air flow and thus the speed of the movement of the powder, the less accurate the signal. Therefore, conventionally, there has been only a method of confirming whether or not the powder is transported in a state of being uniformly dispersed by looking at the finished product.
【０００５】本発明は上述の点に鑑みてなされたもの
で、管のなかを気流に乗って流れている粉体、特に塊状
になっている粉体の分散状況を正確に検出できる粉体検
出装置を提供することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a powder detection method capable of accurately detecting the state of dispersion of powder flowing in a pipe through an airflow, particularly, a lump of powder. It is intended to provide a device.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
本発明は、粉体を気流とともに輸送するための内面平滑
な透明管の外周面に金属蒸着等により鏡面を形成し、前
記透明管の内部壁面に向けて光源より光を射出し、内部
壁面で該透明管の長手方向に複数回反射を繰り返したの
ち光が入射するよう該透明管の出口近くに設けた受光部
を設けた。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a transparent tube having a smooth inner surface for transporting powders together with an air current. A light-receiving unit was provided near the outlet of the transparent tube so that light was emitted from the light source toward the inner wall surface, the light was repeatedly reflected on the inner wall surface in the longitudinal direction of the transparent tube a plurality of times, and then the light was incident.
【０００７】[0007]
【作用】上記のように、粉体を輸送する透明管の外周を
鏡面となし、鏡面部分の入口から光をその内部壁面に入
射し、該内部壁面で複数回反射させて輸送粉体のなかを
通過させ、該鏡面部の出口に設けた受光部に入射するよ
う構成したので、光と粉体の接触距離が長くなり該受光
部に入射する光量の変化により前記輸送粉体の分散状況
を正確に検出することができる。As described above, the outer periphery of the transparent tube for transporting the powder is made a mirror surface, and light is incident on the inner wall surface from the entrance of the mirror surface portion, and is reflected by the inner wall surface a plurality of times to form the inside of the transported powder. Through the light receiving portion provided at the exit of the mirror surface portion, so that the contact distance between the light and the powder becomes longer, and the change in the amount of light incident on the light receiving portion changes the dispersion state of the transported powder. It can be detected accurately.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。An embodiment of the present invention will be described below with reference to the drawings.
【０００９】図１は本発明の粉体検出装置の縦方向断面
図である。本発明の粉体検出装置は大略透明管１、鏡面
部２、光源３及び受光部４から構成されている。滑らか
な内面を有する例えばガラス管のような透明管１の入口
近くから出口近くまで外周面に金属蒸着、溶着、メッキ
等により鏡面部分が形成されている。このように透明管
１の外周面に円筒状の鏡面を形成し、光の反射面とさせ
る。FIG. 1 is a longitudinal sectional view of a powder detecting device according to the present invention. The powder detecting device according to the present invention generally includes a transparent tube 1, a mirror surface portion 2, a light source 3 and a light receiving portion 4. A mirror surface portion is formed on the outer peripheral surface of the transparent tube 1 having a smooth inner surface, such as a glass tube, from the vicinity of the entrance to the vicinity of the exit thereof by metal deposition, welding, plating, or the like. In this way, a cylindrical mirror surface is formed on the outer peripheral surface of the transparent tube 1 to serve as a light reflecting surface.
【００１０】前記透明管１の内部を入口７から出口８に
向かって矢印Ａ方向に流れる気流に乗って粉体が流動す
る。前記透明管１の入口７の近くに光源３が取付けら
れ、該光源はレーザー光の直進性のよいものが望まし
い。該光源から透明管１の内部壁面に向かって例えばレ
ーザー光が射出される。また一方、透明管１の前記出口
８の近くに受光部４が取付けられている。該受光部４は
増幅器５を通じて例えば電圧表示部等に接続されてい
る。[0010] The powder flows on the air flow flowing in the direction of arrow A from the inlet 7 to the outlet 8 inside the transparent tube 1. The light source 3 is mounted near the entrance 7 of the transparent tube 1, and it is desirable that the light source has good linearity of laser light. For example, a laser beam is emitted from the light source toward the inner wall surface of the transparent tube 1. On the other hand, a light receiving section 4 is mounted near the outlet 8 of the transparent tube 1. The light receiving section 4 is connected through an amplifier 5 to, for example, a voltage display section or the like.
【００１１】上記構成になる本発明の粉体検出装置の作
用について説明する。The operation of the powder detecting device of the present invention having the above-described structure will be described.
【００１２】本発明の粉体検出装置を粉体輸送管装置の
途中に装着する。前記透明管１の内部を入口７から出口
８に向かってＡ方向に気流を流し、該粉体を輸送する。
また、光源３を作動させてレーザー光を透明管１の内部
壁面の鏡面部分に向けて斜め矢印Ｂ方向に射出する。前
記透明管１はその外表面に鏡面を形成しているので、前
記レーザー光は鏡面部２により内面反射され、更に、次
々と図面に示すよう透明管１の長手方向に反射を繰り返
して受光部４に入射する。この際、レーザー光は気流中
の粉体により遮られてその光量が変化する。The powder detector of the present invention is mounted in the middle of a powder transport pipe device. An air current flows through the inside of the transparent tube 1 from the inlet 7 to the outlet 8 in the direction A to transport the powder.
Further, the light source 3 is operated to emit the laser beam in the direction of the oblique arrow B toward the mirror portion of the inner wall surface of the transparent tube 1. Since the transparent tube 1 has a mirror surface on its outer surface, the laser beam is internally reflected by the mirror surface portion 2 and, as shown in the drawing, repeats the reflection in the longitudinal direction of the transparent tube 1 one after another to receive light. 4 is incident. At this time, the laser light is blocked by the powder in the airflow, and the light amount changes.
【００１３】この光量の変化は受光部４において電圧の
変化に変えられ、更に増幅器５により増幅されて、次の
電圧表示部６に送られる。電圧表示部の電圧の変化を見
ることにより、気流中の粉体の分散状況、すなわち均等
に分散をされているかまたは塊状になっているか等を検
知することができる。前記電圧表示部の電圧値を更に制
御部に接続することにより、透明管１の粉体輸送状態を
自動的に制御して、粉塊を減少して気流中に粉体を均等
に分散させ、その結果製品の表面に粉体を均等に分布さ
せるように構成することができる。The change in the amount of light is converted into a change in voltage in the light receiving section 4, further amplified by the amplifier 5, and sent to the next voltage display section 6. By observing the change in the voltage of the voltage display unit, it is possible to detect the state of dispersion of the powder in the airflow, that is, whether the powder is uniformly dispersed or agglomerate. By further connecting the voltage value of the voltage display unit to the control unit, the powder transport state of the transparent tube 1 is automatically controlled, the powder mass is reduced, and the powder is evenly dispersed in the airflow. As a result, it can be configured so that the powder is evenly distributed on the surface of the product.
【００１４】[0014]
【発明の効果】以上説明したように本発明の粉体検出装
置によれば、光を反射できる鏡面部分を有する管内に粉
体を気流に乗って流通させ、前記管の入口近くにおいて
鏡面に向けて光を射出すると、該光が前記管内の鏡面に
繰り返し反射して粉体の流れを複数回通過し、最後に前
記管の出口近くに設けた受光部に入射するようにしたの
で、長い距離で光と粉体が接触し、管内の粉体の分散状
況を正確に検知することができると言う極めて優れた効
果が得られる。又輸送管の外部に鏡面を形成しているた
め管内は滑らかで輸送に対する障害とならない。As described above, according to the powder detecting device of the present invention, the powder is circulated by airflow in a tube having a mirror surface portion capable of reflecting light, and is directed toward the mirror surface near the entrance of the tube. When the light is emitted, the light is repeatedly reflected on the mirror surface in the tube, passes through the flow of the powder a plurality of times, and finally enters the light receiving unit provided near the outlet of the tube, so that the light is emitted over a long distance. Thus, the light and the powder come into contact with each other, and the dispersion state of the powder in the tube can be accurately detected, which is an extremely excellent effect. Further, since the mirror surface is formed outside the transport tube, the inside of the tube is smooth and does not hinder transportation.
【図１】本発明の粉体検出装置の縦方向断面図である。FIG. 1 is a longitudinal sectional view of a powder detecting device according to the present invention.
１ 透明管 ２ 鏡面部 ３ 光源 ４ 受光部 ５ 増幅器 ６ 表示部 ７ 入口 ８ 出口 DESCRIPTION OF SYMBOLS 1 Transparent tube 2 Mirror part 3 Light source 4 Light-receiving part 5 Amplifier 6 Display part 7 Inlet 8 Exit
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 15/00 - 15/14 G01N 21/59 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G01N 15/00-15/14 G01N 21/59
Claims (1)
蒸着等により鏡面とし、該鏡面部分の一端側であって該
透明管の外部に、前記透明管の外周面を通して前記鏡面
内に向けて光を照射する光源と、前記鏡面部分の他端で
あって該透明管の外部に、前記光源から照射されて前記
鏡面内で反射してきた光を前記透明管の外周面を通して
受光する受光部とを具備したことを特徴とする粉体検出
装置。1. A part of an outer peripheral surface of a transparent tube having a smooth inner surface is made into a mirror surface by metal evaporation or the like, and one end side of the mirror surface portion is provided.
The mirror surface is passed through the outer peripheral surface of the transparent tube outside the transparent tube.
A light source for irradiating light inward, and at the other end of the mirror surface portion
The outside of the transparent tube is irradiated from the light source and
The light reflected in the mirror surface passes through the outer peripheral surface of the transparent tube.
A powder detection device, comprising: a light receiving unit that receives light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03334427A JP3095839B2 (en) | 1991-11-22 | 1991-11-22 | Powder detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03334427A JP3095839B2 (en) | 1991-11-22 | 1991-11-22 | Powder detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05142136A JPH05142136A (en) | 1993-06-08 |
| JP3095839B2 true JP3095839B2 (en) | 2000-10-10 |
Family
ID=18277258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03334427A Expired - Fee Related JP3095839B2 (en) | 1991-11-22 | 1991-11-22 | Powder detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3095839B2 (en) |
-
1991
- 1991-11-22 JP JP03334427A patent/JP3095839B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05142136A (en) | 1993-06-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000725 |
|
| LAPS | Cancellation because of no payment of annual fees |