JPS595928A - Light temperature sensor - Google Patents
Light temperature sensorInfo
- Publication number
- JPS595928A JPS595928A JP11500682A JP11500682A JPS595928A JP S595928 A JPS595928 A JP S595928A JP 11500682 A JP11500682 A JP 11500682A JP 11500682 A JP11500682 A JP 11500682A JP S595928 A JPS595928 A JP S595928A
- Authority
- JP
- Japan
- Prior art keywords
- organic medium
- temperature sensor
- dissolved
- high molecular
- temperature
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
- G01K11/16—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of organic materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radiation Pyrometers (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は光温度センサに関する。[Detailed description of the invention] The present invention relates to an optical temperature sensor.
従来、防爆という観点より光ファイバを用いた光温度セ
ンサが各種考案されている。これは化学プラント、貯油
基地、鉱内等における電気式センサーの火花による引火
爆発を防ぐためのものである。また光ファイバの長距離
伝送性による遠隔地の温度検出等に有効な手段を与える
ものである。Conventionally, various optical temperature sensors using optical fibers have been devised from the viewpoint of explosion protection. This is to prevent ignition and explosions caused by sparks from electrical sensors in chemical plants, oil storage terminals, mines, etc. It also provides an effective means for temperature detection in remote locations due to the long-distance transmission properties of optical fibers.
本発明の目的はこの分野で高分子物質の可逆的析出現象
を利用して温度検知をする光温度センサを提供すること
である。An object of the present invention is to provide an optical temperature sensor in this field that detects temperature by utilizing the reversible precipitation phenomenon of polymeric substances.
本発明において用いられる高分子物質は比較的高温度で
は有機媒体中に溶解または分散し透明であるが、温度を
下げると高分子物質の一部または全部が媒体中で析出し
、不透明となる。逆に温度を上げるともとの透明な状態
にもどる。その析出が起る温度は、高分子物質と有機媒
体の組み合せ及び高分子物質の分子量によって変えるこ
とができる。たとえばＡ、Ｒ５ｈｕｌｔｙとＰ、’Ｊ、
’Ｆ’１ｏｒｙ著 ジャーナル・オブ・アメリカンケミ
カル・リナイアティ ７ダ巻 １７６０η（／夕に、２
年）； ＲＫＯｎｉｎｇＳＶ８％著ジャーナル・Ａブ・
ポリマー ′リイエンス パートＡ−、！、＆巻３２．
ｒ頁（７９乙ざ年）を参照。高分子物質と有機媒体とは
、適宜組合わせて選択することができるが、溶解もしく
は分散した状態で透明、好ましくは無色透明であり、耐
久性があり、毒性のないものが良い。以上の条件を満足
【７室懸及び１５０°Ｃ付近で可逆的に析出、溶解させ
るだめの好適な組み合せは、それぞれポリスチレンとシ
クロヘキサン及びポリエチレンとジフェニルニーデルで
ある。The polymeric substance used in the present invention is dissolved or dispersed in an organic medium and is transparent at relatively high temperatures, but when the temperature is lowered, part or all of the polymeric substance precipitates in the medium and becomes opaque. Conversely, when the temperature is raised, it returns to its original transparent state. The temperature at which the precipitation occurs can be varied depending on the combination of polymeric material and organic medium and the molecular weight of the polymeric material. For example, A, R5hulty and P, 'J,
'F'1ory, Journal of American Chemical Renewability, Volume 7, 1760η (/Evening, 2
); RKOning SV8% Journal AB
Polymer 'Reliance Part A-,! , & Volume 32.
See page r (79 Otsuza). The polymeric substance and the organic medium can be selected in an appropriate combination, but one that is transparent in a dissolved or dispersed state, preferably colorless and transparent, durable, and non-toxic is preferable. The above conditions are satisfied. [Suitable combinations of seven chambers and reversibly precipitated and dissolved at around 150°C are polystyrene and cyclohexane and polyethylene and diphenyl needle, respectively.
高分子物質と有機媒体との配合割合は高分子物質か有機
媒体に溶解または分散つる範囲内であれば任意である。The blending ratio of the polymeric substance and the organic medium is arbitrary as long as the polymeric substance is dissolved or dispersed in the organic medium.
しかし、高分子物質の量があまり小であると、調度変化
前後の光透過の差が小さくなって、実用的でない。従、
て高分子物質は、それと有機媒体との会計縦に対して体
積分率ｏ、ｏｉ以上含有されることが好ましい。また、
高分子物質が有機媒体ｔ（溶解または分散できる最大値
に限りがあり、低温時の透過率を小さくする必要がある
ため高分子物質と有機媒体とを含有するセルの厚さはＱ
ｊ；ｍｍ以上であることが好ましい。However, if the amount of the polymeric substance is too small, the difference in light transmission before and after the furniture change becomes small, making it impractical. Follow,
It is preferable that the polymer substance is contained in a volume fraction of o, oi or more with respect to the total length of the polymer substance and the organic medium. Also,
The thickness of a cell containing a polymeric substance and an organic medium is
It is preferable that j; mm or more.
オ／図に光温度センタの構成を示す。本発明の光温度セ
ンサは高分子物質と有機媒体よりなる温度検知体／、光
ファイバ２．．２’ 、光源３．光検知器ｌ、レンズ例
えば集束性レンズｓ、ｓｌよりなる。The configuration of the optical temperature center is shown in the figure below. The optical temperature sensor of the present invention includes a temperature sensing body made of a polymeric substance and an organic medium; an optical fiber; ．． 2', light source 3. It consists of a photodetector l, lenses such as focusing lenses s, sl.
温度検知体は透明セル中に高分子物質を溶解または分散
した有機媒体を収容している。The temperature sensor contains an organic medium in which a polymeric substance is dissolved or dispersed in a transparent cell.
本発明による光温度センダによれば電気と光の変換部で
ある光＃３．光検知器ｌは測定点より十分離れた位置に
設置できるため防爆性がある。According to the optical temperature sensor according to the present invention, the light #3 which is the electricity-light converter. The photodetector l can be installed at a sufficient distance from the measurement point, so it is explosion-proof.
化学プラント、貯油基地、鉱内等で高分子物質と有機媒
体として室温付近で可逆的析出現象を示すポリスチレン
とシクロヘキサンを使用した光温度センサは、空調用光
１Ｍ度センサとして有効であり、７５０°Ｃ付近で可逆
的析出現象を示すポリエチレンとジフェニルエーテルを
使用した光温度センサは、火災報知器として利用するこ
とができる。Optical temperature sensors using polystyrene and cyclohexane, which exhibit reversible precipitation phenomena near room temperature as polymeric substances and organic media in chemical plants, oil storage terminals, mines, etc., are effective as optical 1M degree sensors for air conditioning, and are effective at 750 degrees. An optical temperature sensor using polyethylene and diphenyl ether, which exhibits a reversible precipitation phenomenon near C, can be used as a fire alarm.
また、水銀温度計や水銀を利用した光温度センサでは、
破損時に人体に害を及ぼし後処理に時間を要するが、前
記のような高分子物質と有機媒体を利用した光温度セン
サであれば、そのようなこともない。In addition, with mercury thermometers and optical temperature sensors that use mercury,
When broken, it causes harm to the human body and requires time for post-processing, but this does not occur if the optical temperature sensor uses a polymeric substance and an organic medium as described above.
以−Ｆ実施例をあげて、本発明をさらに詳細に説明する
が、これにより本発明の範囲が限定されるものでないこ
とは、いうまでもない。The present invention will be described in more detail with reference to Examples, but it goes without saying that the scope of the present invention is not limited thereby.
実施例／
ポリスチレン０．３ｇｒとシクロヘキサン／、２１ｎｌ
をフラスコに入れ加熱すると均一な溶液が得られた。こ
れを室ｆｉｌｌ″Ｃで放置すると底部にシクロヘキサン
に溶は切らないポリスチレンが析出していたが、上澄液
は無色透明均一溶液であった。Example/Polystyrene 0.3gr and cyclohexane/21nl
When heated in a flask, a homogeneous solution was obtained. When this was left in room fill''C, polystyrene, which was not soluble in cyclohexane, was precipitated at the bottom, but the supernatant liquid was a colorless and transparent homogeneous solution.
これを１０ｍｍ×１０ｍｍＸダ５ ｔｎ ｍの石英セル
に入れ紫外可視分光光度計の試料側に入れた。シクロヘ
キサンを入れた同じ大きさの石英セルを参照側に入れた
。室温／ｇ″Ｃで３００ｎｍよりｇ３０ｎｍまで測定す
ると、透過率はほぼ１００％であった。This was placed in a 10 mm x 10 mm x 5 tnm quartz cell and placed on the sample side of an ultraviolet-visible spectrophotometer. A quartz cell of the same size containing cyclohexane was placed on the reference side. When measured from 300 nm to g30 nm at room temperature/g''C, the transmittance was approximately 100%.
試料の温度をくり返し変えてざ３０ ｎｍの波長の光で
透過率を測定するとオフ図に示すように、透過（５）
率の温度変化が観測された。６１．０ｎｌｎの波長の光
の場合もオフ図と同様であった。温度検出体／である試
料の入った石英セルを光ファイバー２と光ファイバー２
１の間に置き光源３よりざ！；０ｎｒｎまたは６乙Ｑｎ
ｍの波長の光を発し、光検知器ｌで出力の有無を測定し
た。レンズ５は光ファイバー２の出射端に設けられてい
て、ファイバー−からの光を平行光に変換して光検知器
ｌに入射させるよファイバー、２１の入射端に設けであ
る。温度検出体の周囲の温度が１０″Ｃであると光検知
器グの出力は無く、ｌｊ″Ｃであると出力は有った。When the temperature of the sample was repeatedly changed and the transmittance was measured using light with a wavelength of 30 nm, a change in the transmittance (5) with temperature was observed, as shown in the off-graph. The case of light with a wavelength of 61.0 nln was also similar to the off-graph. A quartz cell containing a sample, which is a temperature sensor, is connected to optical fiber 2 and optical fiber 2.
Place it between 1 and light source 3! ;0nrn or 6 Otsu Qn
Light with a wavelength of m was emitted, and the presence or absence of output was measured using a photodetector l. A lens 5 is provided at the output end of the optical fiber 2, and is provided at the input end of the fiber 21 to convert the light from the fiber into parallel light and input it to the photodetector 1. There was no output from the photodetector when the temperature around the temperature detector was 10''C, and there was an output when it was lj''C.
逆に温度を下げ１０°Ｃにすると光検知器ダの出力は無
かった。Conversely, when the temperature was lowered to 10°C, there was no output from the photodetector.
図面は本発明の実施例を示すものであって、オ／図は光
温度センサの構成を示す図であり、オフ図はポリスチレ
ンのシクロヘキサン溶液の光学特性を示すグラフである
。
７１Ｍ度検出体 、 、２．ｊ’：光ファイノ４ 。
３：光源 、 ｑ：光検知器 。
ｓ、ｓｌ：レンズ
（７）
第１図
第２図
０ ５ １０ １５
２０ ２５屈羨（０Ｃ）The drawings show examples of the present invention, in which the O/D figure is a diagram showing the configuration of an optical temperature sensor, and the O/D figure is a graph showing the optical characteristics of a cyclohexane solution of polystyrene. 71M degree detection object, ,2. j': Optical Fino 4. 3: light source, q: photodetector. s, sl: Lens (7) Figure 1 Figure 2 0 5 10 15
20 25 Quen (0C)
Claims (1)
たは分散させた、温度変化により可逆的にその高分子物
質を析出させる有機媒体を介在させてなる光温度センサ
。 （２）前記高分子物質と有機媒体がそれぞれポリスチレ
ンとシクロヘキサンである特許請求の範囲１７項記載の
光温度センサ。 （３）前記高分子物質と有機媒体が、それぞれポリエチ
レンとジフェニルエーテルである特許ｉｌｌ 求ノ範囲
オ１項記載の光温度センサ。 （４）前記高分子物質はそれと前記有機媒体との合計量
に対して体積分率０．０ ／以上含有される特許請求の
範囲１７項記載の光温度センサ。−（５）前記高分子物
質と有機媒体がセル内に収容されそのセルの厚さがＱｊ
；ｍｍ以上であることを特徴とする特許請求の範囲１７
項記載の光温度センサ。[Scope of Claims] (]) A light temperature system in which an organic medium in which a polymeric substance is also dissolved or dispersed and which precipitates the polymeric substance reversibly by temperature change is interposed between two optical waveguides. sensor. (2) The optical temperature sensor according to claim 17, wherein the polymeric substance and the organic medium are polystyrene and cyclohexane, respectively. (3) The optical temperature sensor according to item 1 of the patent, wherein the polymeric substance and the organic medium are polyethylene and diphenyl ether, respectively. (4) The optical temperature sensor according to claim 17, wherein the polymer substance is contained in a volume fraction of 0.0/or more with respect to the total amount of the polymer substance and the organic medium. -(5) The polymer substance and the organic medium are housed in a cell, and the thickness of the cell is Qj.
;Claim 17 characterized in that it is not less than mm.
Optical temperature sensor described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11500682A JPS595928A (en) | 1982-07-02 | 1982-07-02 | Light temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11500682A JPS595928A (en) | 1982-07-02 | 1982-07-02 | Light temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS595928A true JPS595928A (en) | 1984-01-12 |
Family
ID=14651949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11500682A Pending JPS595928A (en) | 1982-07-02 | 1982-07-02 | Light temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS595928A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4906107A (en) * | 1986-02-12 | 1990-03-06 | Soundek Oy | Fibre-optic thermometer or temperature alarm device |
| US6019507A (en) * | 1992-11-25 | 2000-02-01 | Terumo Cardiovascular Systems Corporation | Method of making temperature sensor for medical application |
-
1982
- 1982-07-02 JP JP11500682A patent/JPS595928A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4906107A (en) * | 1986-02-12 | 1990-03-06 | Soundek Oy | Fibre-optic thermometer or temperature alarm device |
| US6019507A (en) * | 1992-11-25 | 2000-02-01 | Terumo Cardiovascular Systems Corporation | Method of making temperature sensor for medical application |
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