JPS63307382A - Radiation measuring method - Google Patents
Radiation measuring methodInfo
- Publication number
- JPS63307382A JPS63307382A JP14286387A JP14286387A JPS63307382A JP S63307382 A JPS63307382 A JP S63307382A JP 14286387 A JP14286387 A JP 14286387A JP 14286387 A JP14286387 A JP 14286387A JP S63307382 A JPS63307382 A JP S63307382A
- Authority
- JP
- Japan
- Prior art keywords
- radiation
- scintillator
- optical fiber
- transmitted
- instrument
- 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
- 230000005855 radiation Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title description 8
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 239000013307 optical fiber Substances 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000000691 measurement method Methods 0.000 claims description 6
- 230000005674 electromagnetic induction Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000007796 conventional method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
Abstract
Description
【発明の詳細な説明】 （技術分野） この発明は、放射線計測方法に間するものである。[Detailed description of the invention] (Technical field) The present invention relates to a radiation measurement method.
さらに詳しくは、この発明は、放射線による影響を抑制
し、かつ装置設置上の制約を排除した高清度な放射線の
計測方法に関するものである。More specifically, the present invention relates to a high-purity radiation measurement method that suppresses the effects of radiation and eliminates restrictions on device installation.
（背景技術）
従来からシンチレーション効果を利用した放射線の計測
方法が知られている。この従来の方法は、シンチレーシ
ョン光を、光電子増倍管（または光センサ−）により電
流信号または電圧信号に光電変換し、遠隔地にある計測
装置にまで電線を使用して伝送していた。(Background Art) A method of measuring radiation using the scintillation effect has been known for some time. In this conventional method, scintillation light is photoelectrically converted into a current signal or voltage signal using a photomultiplier tube (or optical sensor), and the signal is transmitted to a measuring device located at a remote location using an electric wire.
この方法は、たとえば、添付した図面の第２図によって
示される。すなわち、放射線の発生源（ア）からの放射
線は、発生源（ア）の近傍に置 ′かれた遮蔽体（イ
）に格納されている放射線検出器であるシンチレータ（
つ）に当って光を発生する。この光は、シンチレータ（
つ）に直接接続している光電子増倍管（または光センサ
−） （工）により光電変換されて電流信号はなは電圧
信号に変えられる。この出力信号を、必要に応じて前置
増幅器（オ）を介して、電線（力）を通じて遠隔地にあ
る計測装置（キ）まで伝送して計測していた。This method is illustrated, for example, by FIG. 2 of the accompanying drawings. In other words, radiation from a radiation source (a) is detected by a scintillator (a radiation detector) housed in a shield (b) placed near the source (a).
) and generates light. This light is transmitted by a scintillator (
A photomultiplier tube (or optical sensor) directly connected to the photomultiplier tube (or optical sensor) converts the current signal into a voltage signal through photoelectric conversion. This output signal was transmitted to a remote measuring device (K) via a preamplifier (O) and an electric wire (JI) as necessary for measurement.
しかしながら、このような従来の方法においては、次の
ような問題が避けられなかった。However, in such conventional methods, the following problems were unavoidable.
（１）前置増幅器等の電子回路を放射線に曝露している
ため、電子部品等に劣化が生じ、長期間の使用に耐えな
い。(1) Because electronic circuits such as preamplifiers are exposed to radiation, electronic components deteriorate and cannot withstand long-term use.
（２）電子回路等の調整時に作業員が放射線を浴びる。(2) Workers are exposed to radiation when adjusting electronic circuits, etc.
（３）光電子増倍管、前置増幅器に電圧源を供給しなけ
ればならない、また、出力信号がきわめて微小な電気信
号であるため、電磁気誘導雑音の影響を受けやすく、測
定系に外部じよう乱が現われて正確な測定が困難である
。(3) A voltage source must be supplied to the photomultiplier tube and preamplifier, and since the output signal is an extremely small electrical signal, it is easily affected by electromagnetic induction noise, and there is no external noise in the measurement system. turbulence appears, making accurate measurement difficult.
（４）光増倍管、前置増幅器等の温度ドリフトに対する
補償が困難である。(4) It is difficult to compensate for temperature drift in photomultiplier tubes, preamplifiers, etc.
（５）検出器と光電子増倍管は一体として組み込まれる
構成のため、遮蔽体が大きくなり、設置場所が制約され
る。(5) Since the detector and the photomultiplier tube are integrated, the shielding body becomes large and the installation location is restricted.
このようなことから、放射線による影響や種々の制約の
ない、より高精度で、かつ安全な放射線計測方法の実現
が望まれていた。For this reason, there has been a desire to realize a radiation measurement method that is more accurate and safer without the effects of radiation or various restrictions.
（発明の目的）
この発明は、以上の通りの事情を踏まえてなされたもの
であり、従来の方法の欠点を改善し、放射線による影響
や制約の小さい、簡便で、高精度な放射線計測の方法を
提供することを目的とじている。(Purpose of the Invention) This invention was made in light of the above circumstances, and provides a simple and highly accurate radiation measurement method that improves the drawbacks of conventional methods and has less influence and restrictions due to radiation. The purpose is to provide the following.
（発明の開示）
この発明の放射線計測方法は、上記の目的を実現するた
めに、シンチレーション効果を利用した放射線検出器か
ら発生する光を光フアイバークープルを介して計測装置
まで伝送することを特徴といている。すなわち、この発
明は、放射線検出器であるシンチレータから得られる発
光信号を、光子の状態のままで光ファイバーを用いて、
遠隔地にある計測装置にまで伝送する。(Disclosure of the Invention) In order to achieve the above object, the radiation measurement method of the present invention is characterized by transmitting light generated from a radiation detector using a scintillation effect to a measurement device via an optical fiber couple. That's what it says. In other words, the present invention uses an optical fiber to transmit luminescent signals obtained from a scintillator, which is a radiation detector, in the state of photons.
It is also transmitted to a measuring device located in a remote location.
添付した図面に沿ってこの発明の詳細な説明する。The present invention will be described in detail with reference to the accompanying drawings.
第１図は、この発明の方法の一例を示したものである。FIG. 1 shows an example of the method of the present invention.
放射線発生源（１）の近傍に遮蔽体（２）を置いている
。この遮蔽体（２）にはシンチレータ（３）を格納して
いる。シンチレータ（３）は、遠隔地にある放射線計測
装置（４）と光フアイバーケーブル（５）によって接続
している。A shield (2) is placed near the radiation source (1). A scintillator (3) is housed in this shield (2). The scintillator (3) is connected to a radiation measuring device (4) located at a remote location via an optical fiber cable (5).
放射線発生源（１）からの放射線をシンチレータ（３）
によって検出し、このシンチレータ（３）の検出によっ
て発生する光をそのまま光ファイバーケーブル（５）に
よって計測装置（４）にまで、伝送する。Radiation from the radiation source (1) is transferred to the scintillator (3)
The light generated by the detection by the scintillator (3) is transmitted directly to the measuring device (4) via the optical fiber cable (5).
こうすることにより、放射線源の近傍には従来の方法の
ように光電子増倍管、光センサ−、前置増幅器等の電子
回路を備える必要がない、また、伝送用の電線も必要で
はない、このため、シンチレータからの出力信号は、従
来方法の電気信号の場合には避けられなかった電磁誘導
等によるしよう一乱の影響を受けることなく、遠隔地の
測定装置に伝送することができる。By doing this, there is no need to provide electronic circuits such as photomultiplier tubes, optical sensors, preamplifiers, etc. near the radiation source as in conventional methods, and there is no need for electric wires for transmission. Therefore, the output signal from the scintillator can be transmitted to a measuring device at a remote location without being affected by disturbances due to electromagnetic induction, etc., which were unavoidable in the case of electrical signals in the conventional method.
また、短絡等による他の装置への影響は排除され、ゲー
ブル等の接触不良の問題も生じない、さらには、アース
の設置方法にも制約されず、接地系からのコモンモード
ノイズの発生もない。In addition, the effects on other devices due to short circuits, etc. are eliminated, and problems with poor connections such as cables do not occur.Furthermore, there are no restrictions on the grounding installation method, and there is no occurrence of common mode noise from the grounding system. .
計測装置にすべての電気回路を一括して管理できること
から、測定システムの合理化、および温度ドリフトの改
善が容易となり、安定した測定系を構成することができ
る。Since all electrical circuits can be managed in one place in the measurement device, it becomes easy to rationalize the measurement system and improve temperature drift, making it possible to construct a stable measurement system.
（発明の効果）
光フアイバーケーブルによる光伝送を特徴とするこの発
明の方法により、以上詳しく説明したように、シンチレ
ータ−により検出した光子を電“磁気誘導等によるしよ
う乱の影響を受けることなく、また温度ドリフトの改善
を容易にして放射線エネルギー分布や計数率の測定等が
高精度で可能となる。(Effects of the Invention) As explained in detail above, the method of the present invention, which is characterized by optical transmission using an optical fiber cable, allows photons detected by a scintillator to be transmitted without being affected by disturbances caused by electromagnetic induction, etc. Furthermore, temperature drift can be easily improved, making it possible to measure radiation energy distribution, count rate, etc. with high precision.
また、特に、この発明の方法により、従来法においては
必須のものであった放射線検出器近傍に設置していた光
電子増倍管、光センサ−、前置増幅器等が不要となるた
め、遠隔地にも電子装置を配置する必要もなく、計測シ
ステムの簡素化を図ることが可能となる。In particular, the method of the present invention eliminates the need for photomultiplier tubes, optical sensors, preamplifiers, etc. that were installed near the radiation detector, which were essential in the conventional method. There is no need to place any electronic equipment in the measurement system, and the measurement system can be simplified.
第１図はこの発明の方法を例示したシステム構成図であ
る。第２図は、従来の方法を示したシステム構成図であ
る。
１・・・放射線発生源、 ２・・・遮蔽体、３・・・シ
ンチレータ、 ４・・・計測装置、５・・・光フアイバ
ーケーブル。
代理人 弁理士 西 澤 利 火弟 １ 図FIG. 1 is a system configuration diagram illustrating the method of the present invention. FIG. 2 is a system configuration diagram showing a conventional method. DESCRIPTION OF SYMBOLS 1... Radiation source, 2... Shielding body, 3... Scintillator, 4... Measuring device, 5... Optical fiber cable. Agent Patent Attorney Toshi Nishizawa 1 Diagram
Claims (1)
ら発生する光を光ファイバーケーブルを介して計測装置
まで伝送することを特徴とする放射線計測方法。(1) A radiation measurement method characterized by transmitting light generated from a radiation detector using a scintillation effect to a measurement device via an optical fiber cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14286387A JPS63307382A (en) | 1987-06-08 | 1987-06-08 | Radiation measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14286387A JPS63307382A (en) | 1987-06-08 | 1987-06-08 | Radiation measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63307382A true JPS63307382A (en) | 1988-12-15 |
Family
ID=15325363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14286387A Pending JPS63307382A (en) | 1987-06-08 | 1987-06-08 | Radiation measuring method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63307382A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5313065A (en) * | 1992-09-01 | 1994-05-17 | The Babcock & Wilcox Company | Fiber optic radiation monitor |
| US5780856A (en) * | 1995-04-27 | 1998-07-14 | Mitsubishi Denki Kabushiki Kaisha | Radiation detector and method of detecting radiation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58785A (en) * | 1981-06-26 | 1983-01-05 | Fujitsu Ltd | Radiation measuring device |
| JPS5946878A (en) * | 1982-09-10 | 1984-03-16 | Toshiba Corp | Radiation measuring element |
-
1987
- 1987-06-08 JP JP14286387A patent/JPS63307382A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58785A (en) * | 1981-06-26 | 1983-01-05 | Fujitsu Ltd | Radiation measuring device |
| JPS5946878A (en) * | 1982-09-10 | 1984-03-16 | Toshiba Corp | Radiation measuring element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5313065A (en) * | 1992-09-01 | 1994-05-17 | The Babcock & Wilcox Company | Fiber optic radiation monitor |
| US5780856A (en) * | 1995-04-27 | 1998-07-14 | Mitsubishi Denki Kabushiki Kaisha | Radiation detector and method of detecting radiation |
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