JPH01320449A - Optical measuring apparatus - Google Patents
Optical measuring apparatusInfo
- Publication number
- JPH01320449A JPH01320449A JP63152235A JP15223588A JPH01320449A JP H01320449 A JPH01320449 A JP H01320449A JP 63152235 A JP63152235 A JP 63152235A JP 15223588 A JP15223588 A JP 15223588A JP H01320449 A JPH01320449 A JP H01320449A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- prism
- oscillator
- ultrasonic
- case
- 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 25
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 5
- 230000010355 oscillation Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000013307 optical fiber Substances 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
- B08B7/026—Using sound waves
- B08B7/028—Using ultrasounds
-
- 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
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/154—Ultrasonic cleaning
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光学的に液体の屈折率等を計測する光学計測器
の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an optical measuring instrument that optically measures the refractive index of a liquid.
従来、この種のセンサは、液体の屈折率がその液体の特
徴２例えば種類やその溶液の濃度と密接に関係すること
を利用し、光学プリズムとの間において全反射の臨界角
を計測したり、光学プリズムと液体との境界面における
測定光の反射率を求める等によりて目的の計測を行なっ
てきた。Conventionally, this type of sensor utilizes the fact that the refractive index of a liquid is closely related to the characteristics of the liquid, such as the type and concentration of the solution, and measures the critical angle of total reflection between it and an optical prism. , objective measurements have been carried out by determining the reflectance of measurement light at the interface between an optical prism and a liquid.
−例をあげると、第２図に示される様な液体識別センサ
では、プリズム１の被測定液体に接する面は、被測定液
体の屈折率に応じて９反射率が変わる。２は光源、３は
検出器、４はファイバ、５はレンズである。センサは、
測定面が空気中にある時の検出光パワーと、測定面が被
測定液体６に接している時の検出光パワーを検出器３で
検出すると共に、これらの比較して境界面の反射率を求
め、最終的には液体の屈折率を知る。- For example, in a liquid identification sensor as shown in FIG. 2, the surface of the prism 1 in contact with the liquid to be measured has a reflectance that changes by 9 depending on the refractive index of the liquid to be measured. 2 is a light source, 3 is a detector, 4 is a fiber, and 5 is a lens. The sensor is
The detector 3 detects the detected light power when the measurement surface is in the air and the detection light power when the measurement surface is in contact with the liquid to be measured 6, and compares them to determine the reflectance of the interface. Find the refractive index of the liquid.
ところで、光学センサは表面の清浄度にょシ性能が影響
を受けることが多い。そのために、光学センサは測定の
度に、光学特性に関係する面を拭く等の処置を施すこと
が望ましい。Incidentally, the performance of optical sensors is often affected by the cleanliness of the surface. For this reason, it is desirable to take measures such as wiping the surfaces related to the optical characteristics of the optical sensor every time a measurement is performed.
実験室内で非連続的に測定する場合は、センサヘッドの
洗浄９校正等がその都度性なえるため。When measuring discontinuously in a laboratory, cleaning and calibration of the sensor head are required each time.
実際上、センサへ、ラドの汚れによる誤差の発生は避け
ることができる。In fact, errors caused by rad contamination on the sensor can be avoided.
しかし、光学センサをプラントの液体配管や。However, optical sensors are used in plant liquid piping and other applications.
液体の貯蔵タンクに据付け、常時、計測するシステムを
構成する場合、光学センサヘッドの汚れを清浄すること
はプラントの動作停止を伴うこととなるので、実際上、
相当長期間に亘って不可能となる場合が多い。When configuring a system that is installed in a liquid storage tank and constantly performs measurements, cleaning the optical sensor head will involve stopping the plant, so in practice,
This is often impossible for a considerable period of time.
本発明はこのような状況を考え、光学センサを設置箇所
から取りはずすことなく、ヘッド面の汚れを除去できる
ような光学測定器を提供しようとするものである。In view of this situation, the present invention aims to provide an optical measuring instrument that can remove dirt from the head surface without removing the optical sensor from the installation location.
本発明によれば、液体に接した状態でその屈折率等の光
学特性を測定する光学センサと、該光学センサと前記液
体との接触面に隣接した位置に配置され超音波発振部と
を含む光学測定器が得られる。According to the present invention, the present invention includes an optical sensor that measures optical properties such as a refractive index while in contact with a liquid, and an ultrasonic oscillation unit that is disposed adjacent to a contact surface between the optical sensor and the liquid. An optical measuring instrument is obtained.
第１図は本発明の一実施例の構造を示す。 FIG. 1 shows the structure of one embodiment of the present invention.
第１図において、第２図で説明した測定システムを水密
構造にてケース１０に収納すると共に。In FIG. 1, the measurement system explained in FIG. 2 is housed in a case 10 with a watertight structure.
プリズム１に隣接させて超音波発振器１１を並設してい
る。プリズム１はヘッド面が被測定液体６に接し得るよ
うにケース１０外に露出される。超音波発振器１１もそ
の超音波放射面が被測定液体を向くように設けられる。An ultrasonic oscillator 11 is arranged adjacent to the prism 1. The prism 1 is exposed outside the case 10 so that its head surface can come into contact with the liquid 6 to be measured. The ultrasonic oscillator 11 is also provided so that its ultrasonic emission surface faces the liquid to be measured.
図示の如く、ケース１０は被測定液体６中に浸漬状態に
て据付けられる。なお、超音波発振器１１もその超音波
放射面がプリズム１のヘッド面を向くようにケース１０
外に露出させて設置するのが好ましい。As shown in the figure, the case 10 is installed immersed in the liquid 6 to be measured. Note that the ultrasonic oscillator 11 is also attached to the case 10 so that its ultrasonic emission surface faces the head surface of the prism 1.
It is preferable to install it so that it is exposed to the outside.
この様な使用状態で超音波発振器１１を定期的に駆動す
ることにより、プリズム１のヘッド面は超音波洗浄され
る。超音波発振器１１の駆動は遠隔で操作でき、しかも
機械的な作業を伴わないので平易で確実な洗浄が実現で
きる。By periodically driving the ultrasonic oscillator 11 under such usage conditions, the head surface of the prism 1 is ultrasonically cleaned. The driving of the ultrasonic oscillator 11 can be controlled remotely, and since no mechanical work is involved, simple and reliable cleaning can be achieved.
以上説明してきたように２本発明によれば液体に接して
測定を行う光学測定器の光学センサに隣接させて超音波
発振器を並設したことにより、設置状態のままで光学セ
ンサのヘッド面の洗浄が可能となり、常に高精度の測定
を行うことができる。As explained above, according to the present invention, an ultrasonic oscillator is installed adjacent to the optical sensor of an optical measuring instrument that measures in contact with a liquid, so that the head surface of the optical sensor can be Cleaning is now possible, and highly accurate measurements can be performed at all times.
それ故１本発明による測定器はプラント等に据付状態で
設置されるタイプに最適である。Therefore, the measuring instrument according to the present invention is most suitable for a type installed in a plant or the like.
第１図は本発明の一実施例の構造を示す図、第２図は従
来の光学測定器の一例を説明するだめの図。
図中、１はプリズム、２は光源、３は検出器。
４は光ファイバ、５はレンズ、６は被測定液体。
１０はケース、１１は超音波発振器。
第１図
第２図FIG. 1 is a diagram showing the structure of an embodiment of the present invention, and FIG. 2 is a diagram illustrating an example of a conventional optical measuring device. In the figure, 1 is a prism, 2 is a light source, and 3 is a detector. 4 is an optical fiber, 5 is a lens, and 6 is a liquid to be measured. 10 is a case, 11 is an ultrasonic oscillator. Figure 1 Figure 2
Claims (1)
する光学センサと、該光学センサと前記液体との接触面
に隣接した位置に配置された超音波発振部とを含む光学
測定器。1. An optical measuring device that includes an optical sensor that measures optical properties such as a refractive index while in contact with a liquid, and an ultrasonic oscillator located adjacent to the contact surface between the optical sensor and the liquid. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63152235A JPH01320449A (en) | 1988-06-22 | 1988-06-22 | Optical measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63152235A JPH01320449A (en) | 1988-06-22 | 1988-06-22 | Optical measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01320449A true JPH01320449A (en) | 1989-12-26 |
Family
ID=15536041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63152235A Pending JPH01320449A (en) | 1988-06-22 | 1988-06-22 | Optical measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01320449A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0634228A2 (en) * | 1993-05-21 | 1995-01-18 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG | Arrangement for cleaning surfaces or surface regions of submerged apparatus |
| US5742382A (en) * | 1993-09-07 | 1998-04-21 | Janeksko Oy | Refractometer |
| FR2777354A1 (en) * | 1998-04-10 | 1999-10-15 | Seres | Turbidity probe for checking effluent discharges |
| EP1070953A1 (en) * | 1999-07-21 | 2001-01-24 | Societe D'etude Et De Realisation D'equipements Speciaux - S.E.R.E.S. | Method and device for optically measuring liquid transparency |
| EP1256793A1 (en) * | 2001-05-11 | 2002-11-13 | WTW Wissenschaftlich-Technische Werkstätten GmbH & Co. KG | Device for optical measurement in a medium |
| JP2006170768A (en) * | 2004-12-15 | 2006-06-29 | Yokogawa Electric Corp | Apparatus and method for detecting stain and monitoring camera |
| WO2009134145A1 (en) * | 2008-04-30 | 2009-11-05 | Proanalysis As | Acoustic cleaning of optical probe window |
| GB2580699A (en) * | 2019-01-25 | 2020-07-29 | Inov8 Systems Ltd | Self cleaning optical probe |
| WO2022089976A1 (en) * | 2020-10-30 | 2022-05-05 | Inov8 Systems Limited | Self cleaning optical probe |
-
1988
- 1988-06-22 JP JP63152235A patent/JPH01320449A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0634228A3 (en) * | 1993-05-21 | 1995-02-15 | Grundig Emv | Arrangement for cleaning surfaces or surface regions of submerged apparatus. |
| EP0634228A2 (en) * | 1993-05-21 | 1995-01-18 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG | Arrangement for cleaning surfaces or surface regions of submerged apparatus |
| US5742382A (en) * | 1993-09-07 | 1998-04-21 | Janeksko Oy | Refractometer |
| FR2777354A1 (en) * | 1998-04-10 | 1999-10-15 | Seres | Turbidity probe for checking effluent discharges |
| EP1070953A1 (en) * | 1999-07-21 | 2001-01-24 | Societe D'etude Et De Realisation D'equipements Speciaux - S.E.R.E.S. | Method and device for optically measuring liquid transparency |
| US6324900B1 (en) | 1999-07-21 | 2001-12-04 | Societe D'etude Et De Realisation D' Equipments Speciaux | Method and a device for optically measuring the transparency of a liquid |
| EP1256793A1 (en) * | 2001-05-11 | 2002-11-13 | WTW Wissenschaftlich-Technische Werkstätten GmbH & Co. KG | Device for optical measurement in a medium |
| JP4569814B2 (en) * | 2004-12-15 | 2010-10-27 | 横河電機株式会社 | Dirt detection device, surveillance camera, and dirt detection method |
| JP2006170768A (en) * | 2004-12-15 | 2006-06-29 | Yokogawa Electric Corp | Apparatus and method for detecting stain and monitoring camera |
| WO2009134145A1 (en) * | 2008-04-30 | 2009-11-05 | Proanalysis As | Acoustic cleaning of optical probe window |
| CN102105778A (en) * | 2008-04-30 | 2011-06-22 | 专业分析公司 | Acoustic cleaning of optical probe window |
| GB2580699A (en) * | 2019-01-25 | 2020-07-29 | Inov8 Systems Ltd | Self cleaning optical probe |
| GB2580699B (en) * | 2019-01-25 | 2021-05-05 | Inov8 Systems Ltd | Self cleaning optical probe |
| US11994461B2 (en) | 2019-01-25 | 2024-05-28 | Inov8 Systems Limited | Self cleaning optical probe |
| WO2022089976A1 (en) * | 2020-10-30 | 2022-05-05 | Inov8 Systems Limited | Self cleaning optical probe |
| GB2600454B (en) * | 2020-10-30 | 2023-05-10 | Inov8 Systems Ltd | Self cleaning optical probe |
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