JPS6312920A - Removing method for fog drip from detector optical path - Google Patents
Removing method for fog drip from detector optical pathInfo
- Publication number
- JPS6312920A JPS6312920A JP15749886A JP15749886A JPS6312920A JP S6312920 A JPS6312920 A JP S6312920A JP 15749886 A JP15749886 A JP 15749886A JP 15749886 A JP15749886 A JP 15749886A JP S6312920 A JPS6312920 A JP S6312920A
- Authority
- JP
- Japan
- Prior art keywords
- optical path
- detector
- far infrared
- infrared ray
- fog
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 4
- 230000001678 irradiating effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 abstract description 18
- 238000001514 detection method Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005098 hot rolling Methods 0.000 abstract description 3
- 238000000862 absorption spectrum Methods 0.000 abstract description 2
- 239000011368 organic material Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000010926 purge Methods 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000003595 spectral effect Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000008016 vaporization Effects 0.000 abstract 1
- 239000003595 mist Substances 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は検出器光路の霧滴除去方法に関し、光学的な
検出を行う場合に妨げになる霧滴を効率良く除去させる
ことを目的とする。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for removing fog droplets from a detector optical path, and an object of the present invention is to efficiently remove fog droplets that obstruct optical detection. .
〈従来の技術〉
光学的な検出器を用いる場合、従来よりその光路にある
霧滴により、検出精度が低下するという問題があった。<Prior Art> When using an optical detector, there has conventionally been a problem that detection accuracy is reduced due to fog droplets in the optical path of the detector.
これを圧延ラインを例にとって説明する。This will be explained using a rolling line as an example.
第３図は圧延機前後の検出器の配置を示すもので、圧延
機５０の後段側に放射温度計５３と材料の先後端検出器
の投光器５４、受光器５５が配置されている。投光器５
４、受光器５５は第４図に示すように材料５１によって
光路がｇ１９ｉされることを利用して通過を検出する。FIG. 3 shows the arrangement of detectors before and after the rolling mill, and a radiation thermometer 53, a light emitter 54 and a light receiver 55 for detecting the leading and trailing ends of the material are arranged on the downstream side of the rolling mill 50. Floodlight 5
4. As shown in FIG. 4, the light receiver 55 detects passage by utilizing the optical path g19i caused by the material 51.
一方、圧延機５０の前後にはデスケーリング水の噴射ノ
ズル５２．５２が装備されている。On the other hand, descaling water injection nozzles 52 and 52 are installed before and after the rolling mill 50.
この放射温度計５３．投光器５４．受光器５５の光路に
は噴射ノズル５２の噴射水の飛沫が侵入し、材料通過後
も霧状に漂っているのが通常である。この霧滴は放射温
度計５３の視野内で材料からの放射エネルギーを吸収し
てしまうため、正確な測定が出来なくなる。また、材料
が視野内にない場合でも、材料からの放射光がその表面
で反射するため、放射温度計５３を通過検出器として使
用するときには通過検出タイミングに誤差を生じる。ま
た投光器５４、受光器５５の構成で通過検出を行う場合
、材料がない状態で投光器５４の光が散乱し、受光器５
５に必要な通過エネルギーが伝わらないことが有り、こ
の場合材料がないのに材料があるという誤った検出をす
ることになる。This radiation thermometer 53. Floodlight 54. Usually, droplets of water jetted from the jetting nozzle 52 enter the optical path of the light receiver 55 and remain floating in the form of mist even after passing through the material. These mist droplets absorb radiation energy from the material within the field of view of the radiation thermometer 53, making accurate measurement impossible. Further, even when the material is not within the field of view, the emitted light from the material is reflected on its surface, which causes an error in the passage detection timing when the radiation thermometer 53 is used as a passage detector. In addition, when performing passage detection with the configuration of the light emitter 54 and the light receiver 55, the light from the light emitter 54 is scattered when there is no material, and the light receiver 55
5, the necessary passing energy may not be transmitted, and in this case, it will be erroneously detected that there is material when there is no material.
このような問題を解決するために、従来は検出器の光路
に存在する霧滴を送風ファン等で強制的に排除するか、
或は検出光路内に霧滴の発生を生じないように遮蔽板や
エヤーカーテン等で水の浸入を防ぐことが一般的に行わ
れてきた。In order to solve this problem, conventional methods have been to forcibly remove the fog droplets that exist in the optical path of the detector using a blower fan, etc.
Alternatively, in order to prevent the generation of mist droplets in the detection optical path, it has been common practice to prevent water from entering with a shielding plate, an air curtain, or the like.
しかし送風ファンは消費電力が大きく圧延機前後のよう
に材料の形状変化の大きいところでは数ｋｗの電力が必
要である。また、遮蔽板やエヤーカーテンは圧延機の直
前直後の１０ｍ以内では高圧デスケーリング水の噴射の
影響が大きく、鉄鋼の熱間圧延ラインでは効果がない。However, the blower fan consumes a large amount of power, and requires several kilowatts of power in areas where the shape of the material changes significantly, such as before and after the rolling mill. In addition, shielding plates and air curtains are greatly affected by the injection of high-pressure descaling water within 10 meters immediately before and after the rolling mill, and are not effective in hot rolling lines for steel.
〈発明の概要〉
本発明は上記した従来技術の問題を解決するために成さ
れたもので、検出器の光路に遠赤外線を照射し、該光路
内の霧滴を加熱し、気化させることを基本的な特徴とす
るものである。<Summary of the Invention> The present invention was made in order to solve the above-mentioned problems of the prior art, and involves irradiating the optical path of a detector with far infrared rays to heat and vaporize the mist droplets in the optical path. This is a basic feature.
〈実施例〉 以下本発明の一実施例を図面にＪ＆づいて説明する。<Example> An embodiment of the present invention will be described below with reference to the drawings.
第１図及び第２図において通過検出器１の場合につき説
明する。２はその検出光路である。本発明においてはこ
の検出光路２に遠赤外線を照射し光路２に漂う霧滴を加
熱気化させる。この実施例では検出器１の近傍に遠赤外
線スポット加熱器３を配置させここから遠赤外線を照射
している。４はその照射範囲であり、材料７上の検出器
の視野５に重なって材料表面を照射している。６はその
材料表面照射範囲を示している。The case of the passage detector 1 will be explained in FIGS. 1 and 2. 2 is its detection optical path. In the present invention, this detection optical path 2 is irradiated with far infrared rays to heat and vaporize the mist droplets floating in the optical path 2. In this embodiment, a far-infrared spot heater 3 is arranged near the detector 1, and far-infrared rays are irradiated from there. 4 is its irradiation range, which overlaps the field of view 5 of the detector on the material 7 and irradiates the material surface. 6 indicates the irradiation range of the material surface.
この遠赤外線スポット加熱器３からの遠赤外線は照射範
囲４の空間に漂う霧滴に吸収されて、霧滴を加熱気化さ
せる。遠赤外線の波長は３μｍ −１０μｍであり、一
方霧滴を構成する水や浦の有機材料の殆どは３−２５μ
ｍ位の波長域に多くの吸収スペクトルを有しているため
、熱吸収効率は極めて高く、はぼ連続的に検出光路２内
に侵入する霧状の粒子を完全に帰化し検出光路２の霧を
はらすことが出来る。The far infrared rays from the far infrared spot heater 3 are absorbed by the mist droplets floating in the space of the irradiation range 4, and heat and vaporize the mist droplets. The wavelength of far infrared rays is 3μm - 10μm, while most of the organic materials in the water and pools that make up the mist droplets are 3μm - 25μm.
Since it has many absorption spectra in the wavelength range of about m, the heat absorption efficiency is extremely high, completely naturalizing the mist-like particles that almost continuously enter the detection optical path 2, and eliminating the fog in the detection optical path 2. You can relieve yourself.
この実施例では検出器１の近傍に更に送風ファン８を設
置して照射範囲４以外の部分の霧滴をパージするように
している。In this embodiment, a blower fan 8 is further installed near the detector 1 to purge mist droplets outside the irradiation range 4.
材料７表面に到達した遠赤外線の一部は反射して検出器
１の視デフ内に入るが、検出器ｌの分光感度は３ル未層
の領域にしか存在しないため検出性能には＃饗しない。A part of the far-infrared rays that reach the surface of material 7 are reflected and enter the visual differential of detector 1, but the spectral sensitivity of detector 1 exists only in the unlayered region, so the detection performance is affected. do not.
〈発明の効果〉
以上説明したように本発明によれば熱間圧延ライン等に
おいても霧滴を効果的に排除することが出来、しかも検
出精度に悪影響を及ぼすことがない、また、消費電力も
少ない等に効果・がある。<Effects of the Invention> As explained above, according to the present invention, fog droplets can be effectively eliminated even in hot rolling lines, etc., without adversely affecting detection accuracy, and with reduced power consumption. It is effective in small quantities.
第１図は本発明法の一実施例を説明するための正面図、
第２図はその側面図、第３図は圧延機前後の検出器の配
置を示す配置図、第４図は従来の材料通過検出方法を示
す説明図である。
ｌ・・・検出器、２・・・検出光路、３・・・遠赤外線
スポット加熱器、４・・・照射範囲、５・・・視野、６
・・・材料表面照射範囲、７・・・材料。FIG. 1 is a front view for explaining one embodiment of the method of the present invention;
FIG. 2 is a side view thereof, FIG. 3 is a layout diagram showing the arrangement of detectors before and after the rolling mill, and FIG. 4 is an explanatory diagram showing a conventional material passage detection method. l...Detector, 2...Detection optical path, 3...Far infrared spot heater, 4...Irradiation range, 5...Field of view, 6
...Material surface irradiation range, 7...Material.
Claims (1)
熱し、気化させることを特徴とする検出器光路の霧滴除
去方法。A method for removing fog droplets from a detector optical path, which comprises irradiating the optical path of a detector with far infrared rays to heat and vaporize the fog droplets in the optical path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15749886A JPS6312920A (en) | 1986-07-04 | 1986-07-04 | Removing method for fog drip from detector optical path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15749886A JPS6312920A (en) | 1986-07-04 | 1986-07-04 | Removing method for fog drip from detector optical path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6312920A true JPS6312920A (en) | 1988-01-20 |
Family
ID=15650996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15749886A Pending JPS6312920A (en) | 1986-07-04 | 1986-07-04 | Removing method for fog drip from detector optical path |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6312920A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5716913A (en) * | 1995-04-18 | 1998-02-10 | Asahi Denka Kogyo Kabushiki Kaisha | Metal working oil composition and method of working metal |
-
1986
- 1986-07-04 JP JP15749886A patent/JPS6312920A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5716913A (en) * | 1995-04-18 | 1998-02-10 | Asahi Denka Kogyo Kabushiki Kaisha | Metal working oil composition and method of working metal |
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