JPS60107547A - Top and reverse discrimination method of float glass plate - Google Patents
Top and reverse discrimination method of float glass plateInfo
- Publication number
- JPS60107547A JPS60107547A JP21511583A JP21511583A JPS60107547A JP S60107547 A JPS60107547 A JP S60107547A JP 21511583 A JP21511583 A JP 21511583A JP 21511583 A JP21511583 A JP 21511583A JP S60107547 A JPS60107547 A JP S60107547A
- Authority
- JP
- Japan
- Prior art keywords
- glass plate
- float glass
- reverse
- reflectance
- discrimination
- 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.)
- Granted
Links
- 239000005329 float glass Substances 0.000 title claims abstract description 17
- 238000012850 discrimination method Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
Abstract
Description
【発明の詳細な説明】 本発明はフロートガラス板の表裏面判別方法に関する。[Detailed description of the invention] The present invention relates to a method for determining the front and back surfaces of a float glass plate.
フロートガラス板は、製板プロセスの関係から表面と裏
面とで物理的及び化学的に性状が異っている。このだめ
、このフロートガラス板を素板として表面処理おるいは
その他の加工を行う場合には、その表裏面を判別して使
用しなければならないことがおる。しかし、上記表裏面
の差異は極めて微小であるため、その判別は困難をきだ
しているのが現状でおる。A float glass plate has physically and chemically different properties on its front and back sides due to the plate-making process. However, when performing surface treatment or other processing on this float glass plate as a blank plate, it may be necessary to distinguish between the front and back sides before use. However, since the difference between the front and back surfaces is extremely small, it is currently difficult to distinguish between them.
本発明者はこの問題を種々検討した結果、フロートガラ
ス板は光学的に表面と裏面で若干の差がｓｂ、これらの
反射率が若干具なることに着目し、特に紫外線において
その傾向が顕著であることを見出し、本発明を完成した
ものである。As a result of various studies on this problem, the inventors of the present invention noticed that there is a slight optical difference sb between the front and back surfaces of a float glass plate, and the reflectance of these plates is slightly different, and this tendency is particularly noticeable in ultraviolet rays. This discovery led to the completion of the present invention.
フ０−）ガラス板は、フロート成形工程において錫浴面
に接触する裏面と接触しない表面とで光反射率が異って
いる。第１図はフロートガラスに紫外線を照射した場合
の表面と裏面の反射率を示す。図から明らかなように、
２２０〜３２０ｎｍの波長域において表面上シ裏面の方
が約１％程度、反射率が高い傾向がある。F0-) The light reflectance of the glass plate is different between the back side that comes into contact with the tin bath surface and the front side that does not come into contact with the tin bath surface during the float molding process. Figure 1 shows the reflectance of the front and back surfaces of float glass when irradiated with ultraviolet rays. As is clear from the figure,
In the wavelength range of 220 to 320 nm, the reflectance of the front surface and the back surface tends to be about 1% higher.
本発明はこの反射率の差を例えば光電子倍増管を使用し
て検知し、これに基いて表裏面を判別するもので、判別
は電気的に迅速に行うととができる。In the present invention, this difference in reflectance is detected using, for example, a photomultiplier, and based on this, the front and back surfaces are discriminated, and the discrimination can be quickly performed electrically.
第２図は、本発明によシフロートガラス板の表裏面を判
別する場合の一例を示す。本例はコンベヤによシ搬送さ
れてくるガラス板１０表裏面を連続的に判別するもので
、光源２よシガラス板１に所望の波長の紫外線を照射し
、その反射光を例えば光電子増倍管３によシ検出し、こ
の検出信号を制御盤４によシ処理して判別する。FIG. 2 shows an example of the case where the front and back surfaces of a shift float glass plate are discriminated according to the present invention. In this example, the front and back sides of a glass plate 10 conveyed by a conveyor are continuously determined. A light source 2 irradiates the glass plate 1 with ultraviolet rays of a desired wavelength, and the reflected light is emitted from a photomultiplier tube, for example. 3, and this detection signal is processed by the control panel 4 for discrimination.
上記光源２としては、例えば殺菌灯を使用することがで
き、ガラス板１の板面に対し通常は斜め方向から照射す
るのが望ましい。As the light source 2, for example, a germicidal lamp can be used, and it is desirable to irradiate the surface of the glass plate 1 from an oblique direction.
制御盤４には、ガラス板１の表面あるいは裏面の反射率
を予め設定しておき、光電子倍増管３によシ検出された
反射率をこの設定値と対比することにより、上記ガラス
板１の表面あるいは裏面を判別する。尚、この判別結果
は、表示灯５，６によシ例えば５が照灯すれば裏面、６
が照灯すれば表面として検知する。The reflectance of the front or back surface of the glass plate 1 is set in advance on the control panel 4, and the reflectance detected by the photomultiplier tube 3 is compared with this set value to determine the reflectance of the glass plate 1. Distinguish whether it is the front or back side. The result of this discrimination is that if the indicator lights 5 and 6 illuminate, for example, 5, then the back side and 6.
When illuminated, it is detected as a surface.
なお、この場合ガラス板１０反射率はガラス板の厚味の
変更などによシ多少変わる場合があるので、板厚の変更
あるいは製板のロットが変るごとに、必要に応じその設
定値を再調整するようにする。In this case, the reflectance of the glass plate 10 may change slightly due to changes in the thickness of the glass plate, so the set value should be readjusted as necessary whenever the plate thickness or the lot of plate production changes. Make adjustments.
また、ガラス板１の表裏面の反射率は、前記したように
２２０〜３２０ｎｍの紫外線波長域において顕著な差異
を有するので、検出に使用する紫外線としてはこの波長
域のものを使用する。Furthermore, since the reflectance of the front and back surfaces of the glass plate 1 has a remarkable difference in the ultraviolet wavelength range of 220 to 320 nm as described above, the ultraviolet light used for detection is in this wavelength range.
本発明は以上記述したように構成されているので、フロ
ートガラス板面に紫外線を照射し、その反射率を検出す
ることによシ、その表裏面を簡便に判別できる。Since the present invention is configured as described above, by irradiating the surface of a float glass plate with ultraviolet rays and detecting its reflectance, it is possible to easily distinguish between the front and back surfaces of the float glass plate.
第１図はフロートガラス板に紫外線を照射した場合の表
面及び裏面における反射率分布の一例を示す説明図、第
２図は本発明の実施例に係るフローシートを示す。
図において、１はフロートガラス板、２は光源、３は光
電子倍増管、４は制御盤。
１？！ｆろFIG. 1 is an explanatory diagram showing an example of the reflectance distribution on the front and back surfaces when a float glass plate is irradiated with ultraviolet rays, and FIG. 2 shows a flow sheet according to an embodiment of the present invention. In the figure, 1 is a float glass plate, 2 is a light source, 3 is a photomultiplier, and 4 is a control panel. 1? ! fro
Claims (1)
反射率によシガラス板の表裏面を判別することを特徴と
するフロートガラス板の表裏面判別方法。 ２、反射光線を光電子増倍管によシ検出することを特徴
とする特許績、求の範囲第１項記載の７四−トガ２ス板
の表裏面判別方法。 ３、波長が２２０〜３２０ｎｍの紫外線を使用すること
を特徴とする特許請求の範囲第１項記載のフロートガラ
ス板の表裏面判別方法。[Scope of Claims] 1. A method for determining the front and back sides of a float glass plate, which comprises irradiating the surface of the float glass plate with ultraviolet rays and determining the front and back sides of the float glass plate based on the reflectance thereof. 2. A method for determining the front and back surfaces of a 74-toga 2-strip plate as described in item 1 of the patent application, characterized in that reflected light is detected by a photomultiplier tube. 3. A method for determining the front and back surfaces of a float glass plate according to claim 1, characterized in that ultraviolet light having a wavelength of 220 to 320 nm is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21511583A JPS60107547A (en) | 1983-11-17 | 1983-11-17 | Top and reverse discrimination method of float glass plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21511583A JPS60107547A (en) | 1983-11-17 | 1983-11-17 | Top and reverse discrimination method of float glass plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60107547A true JPS60107547A (en) | 1985-06-13 |
| JPH0340819B2 JPH0340819B2 (en) | 1991-06-20 |
Family
ID=16666996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21511583A Granted JPS60107547A (en) | 1983-11-17 | 1983-11-17 | Top and reverse discrimination method of float glass plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60107547A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5667549A (en) * | 1996-01-25 | 1997-09-16 | Vidrio Plano De Mexico, S.A. De C.V. | Method and system to automatically lift the curtains of the exit hood of a machine for the production of float flat glass |
| WO2004051607A1 (en) * | 2002-11-29 | 2004-06-17 | Matsushita Electric Industrial Co., Ltd. | Image display and method for manufacturing same |
| WO2004051606A1 (en) * | 2002-11-29 | 2004-06-17 | Matsushita Electric Industrial Co., Ltd. | Image display and method for evaluating glass substrate to be used in same |
| JP2004191366A (en) * | 2002-11-29 | 2004-07-08 | Matsushita Electric Ind Co Ltd | Imaging display apparatus and method for evaluating glass substrate for the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7244900B2 (en) * | 2018-12-27 | 2023-03-23 | 株式会社フジキン | Front and back identification method of reflective member |
-
1983
- 1983-11-17 JP JP21511583A patent/JPS60107547A/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5667549A (en) * | 1996-01-25 | 1997-09-16 | Vidrio Plano De Mexico, S.A. De C.V. | Method and system to automatically lift the curtains of the exit hood of a machine for the production of float flat glass |
| WO2004051607A1 (en) * | 2002-11-29 | 2004-06-17 | Matsushita Electric Industrial Co., Ltd. | Image display and method for manufacturing same |
| WO2004051606A1 (en) * | 2002-11-29 | 2004-06-17 | Matsushita Electric Industrial Co., Ltd. | Image display and method for evaluating glass substrate to be used in same |
| JP2004191366A (en) * | 2002-11-29 | 2004-07-08 | Matsushita Electric Ind Co Ltd | Imaging display apparatus and method for evaluating glass substrate for the same |
| CN100449583C (en) * | 2002-11-29 | 2009-01-07 | 松下电器产业株式会社 | Imaging display apparatus and method for evaluating glass substrate for the same |
| US7495393B2 (en) | 2002-11-29 | 2009-02-24 | Panasonic Corporation | Image display device and method for manufacturing same |
| US7545561B2 (en) | 2002-11-29 | 2009-06-09 | Panasonic Corporation | Image display and method for evaluating glass substrate to be used in same |
| US7744439B2 (en) | 2002-11-29 | 2010-06-29 | Panasonic Corporation | Image display device and manufacturing method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0340819B2 (en) | 1991-06-20 |
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