JPH0886694A - Noise resistant thermometer - Google Patents
Noise resistant thermometerInfo
- Publication number
- JPH0886694A JPH0886694A JP22297294A JP22297294A JPH0886694A JP H0886694 A JPH0886694 A JP H0886694A JP 22297294 A JP22297294 A JP 22297294A JP 22297294 A JP22297294 A JP 22297294A JP H0886694 A JPH0886694 A JP H0886694A
- Authority
- JP
- Japan
- Prior art keywords
- shield
- magnetic field
- thermometer
- lead wire
- twist pair
- 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
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱電対等を用いた電気
式により温度を検出する温度計に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermometer for detecting temperature by an electric method using a thermocouple or the like.
【０００２】[0002]
【従来の技術】熱電対型温度計は、例えば、１９７８年
５月１０日、岩波書店発行、「岩波理化学辞典第３版」
第１０００頁〜第１００１頁に記載されている。従来の
熱電対型温度計は、温度計の検出部、信号伝送部の配線
がフラットケーブルによって行われているのが一般的で
ある。2. Description of the Related Art Thermocouple-type thermometers are, for example, published by Iwanami Shoten on May 10, 1978, "Iwanami Physics and Chemistry Dictionary 3rd Edition".
Pp. 1000 to 1001. In the conventional thermocouple type thermometer, the detection part of the thermometer and the signal transmission part are generally wired by a flat cable.
【０００３】[0003]
【発明が解決しようとする課題】従来の熱電対型温度計
は、ノイズに対して弱いフラットケーブルが用いられて
いるため、往々にして検出温度を誤表示することがあ
る。Since the conventional thermocouple type thermometer uses a flat cable which is weak against noise, the detected temperature is often erroneously displayed.
【０００４】本発明の目的は、磁界の変動が大きい等の
ノイズが発生しやすい環境においても、安定した温度計
測を可能にする温度計を提供することにある。An object of the present invention is to provide a thermometer that enables stable temperature measurement even in an environment where noise is likely to occur, such as a large fluctuation in magnetic field.
【０００５】[0005]
【課題を解決するための手段】電気式温度計は、温度を
検出する検出部、及びその信号を伝送する信号伝送部か
ら成り立っており、その各々において、耐ノイズ性を高
めるため、ツイストペアー化，外部シールド化，同軸ケ
ーブル化を採用した。An electric thermometer is composed of a detection section for detecting temperature and a signal transmission section for transmitting the signal, and in each of them, a twisted pair is used in order to improve noise resistance. , Adopting external shield and coaxial cable.
【０００６】[0006]
【作用】本発明を達成するため、ツイストペアー化，同
軸ケーブル化は、２線をよじるあるいは同芯化すること
で磁界の変化を打ち消し合う働きをし、外部シールド化
は、信号線に磁界を伝えない働きをする。In order to achieve the present invention, twisted pair and coaxial cable functions to cancel out the change in magnetic field by twisting or concentrating two wires, and the external shield makes the signal line receive a magnetic field. Work without telling.
【０００７】[0007]
【実施例】まず図６により、電気式温度計の基本構成に
ついて説明する。本温度計は、温度検出部１１と検出さ
れた信号を伝送する信号伝送部１２から構成されてい
る。まず、温度検出部１１については、異種金属材料
１，２、及びそれを保護する保護管３から成り立ってお
り、異種金属材料１，２は、先端のみが接合されてお
り、その間にて各温度に応じた特定の起電力が発生する
ようになっている。信号伝送部１２は、温度検出部１１
にて発生した電気信号である起電力を伝送する補償導線
４から成り立っている。本温度計によれば、まず温度検
出部１１においては、保護管３が金属性の場合、ある程
度のシールド性を有するため、耐ノイズ性を発揮する。
しかしながら、高温での使用等のため、金属性の保護管
が使用できず、セラミック系の保護管を使用する必要が
ある場合、保護管にシールド効果を期待することはでき
ない。さらに、異種金属材料である１，２及び信号伝送
ケーブルである補償銅線４はフラットケーブルとなって
おり、同時に耐ノイズ性が考慮されていない構造となっ
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the basic construction of an electric thermometer will be described with reference to FIG. The thermometer is composed of a temperature detection unit 11 and a signal transmission unit 12 that transmits the detected signal. First, the temperature detection unit 11 is composed of different kinds of metal materials 1 and 2 and a protective tube 3 for protecting the different kinds of metal materials. A specific electromotive force according to the above is generated. The signal transmission unit 12 includes the temperature detection unit 11
It is composed of a compensating lead wire 4 for transmitting an electromotive force which is an electric signal generated in 1. According to the present thermometer, first, in the temperature detecting section 11, when the protective tube 3 is made of metal, it has some shield property and therefore exhibits noise resistance.
However, when it is necessary to use a ceramic-based protective tube because a metallic protective tube cannot be used due to use at high temperature and the like, the protective tube cannot be expected to have a shielding effect. Furthermore, the dissimilar metal materials 1 and 2 and the compensating copper wire 4 which is a signal transmission cable are flat cables, and at the same time, noise resistance is not taken into consideration.
【０００８】図１は本発明の一実施例を示す結線図であ
る。この実施例においては、耐ノイズ性を高めるため、
起電力を発生させる異種金属材料１，２及び補償導線４
をツイストペアー化させ、さらに、補償導線においては
シールド膜５によりシールド化が図られている。図２に
示すようにツイストペアー化することによって磁界の変
化に対して、矢印のように起電力が発生し、配線１では
ＡとＤが、配線２ではＢとＣが互いに反対方向なので打
ち消し合うこととなる。また、図３に示すように補償導
線４のシールド５については、磁界がシールド側に流れ
るため、内部の補償導線４に与える影響を軽減すること
が可能となる。FIG. 1 is a connection diagram showing an embodiment of the present invention. In this embodiment, in order to improve noise resistance,
Dissimilar metal materials 1 and 2 for generating electromotive force and compensating lead wire 4
Is made into a twisted pair, and the compensation conductor is shielded by the shield film 5. As shown in FIG. 2, the twisted pair causes an electromotive force as indicated by an arrow in response to a change in the magnetic field. Since A and D in the wiring 1 and B and C in the wiring 2 are in opposite directions, they cancel each other. It will be. Further, as shown in FIG. 3, with respect to the shield 5 of the compensation lead wire 4, since the magnetic field flows toward the shield side, it is possible to reduce the influence on the internal compensation lead wire 4.
【０００９】図４および図５に示す実施例については、
異種材料１，２及び補償導線４を同軸化することによっ
て、上記同様に耐ノイズ性を高めている。For the embodiment shown in FIGS. 4 and 5,
By making the dissimilar materials 1 and 2 and the compensating lead wire 4 coaxial, noise resistance is enhanced in the same manner as above.
【００１０】[0010]
【発明の効果】本発明によれば電気式温度計において、
耐ノイズ性を高めることが可能となるため、電磁誘導等
の強磁場中での磁界変動が生じる環境、１０００℃以上
の高温雰囲気でシールド効果を有する金属性の保護管が
使用できない環境、等においても、安定して温度計測が
可能となる。According to the present invention, in the electric thermometer,
Since it is possible to improve noise resistance, in an environment where magnetic field fluctuations occur in a strong magnetic field such as electromagnetic induction, in environments where a metallic protective tube having a shielding effect cannot be used in a high temperature atmosphere of 1000 ° C or higher, etc. Also, stable temperature measurement is possible.
【図１】図１は本発明の一実施例を示す結線図である。FIG. 1 is a connection diagram showing an embodiment of the present invention.
【図２】図２は磁界によりツイスト線に生じる電流の方
向を示す模式図である。FIG. 2 is a schematic diagram showing a direction of a current generated in a twist line by a magnetic field.
【図３】図３はシールド膜を流れる磁束を示す断面図で
ある。FIG. 3 is a cross-sectional view showing a magnetic flux flowing through a shield film.
【図４】図４は本発明の他の実施例を示す結線図であ
る。FIG. 4 is a connection diagram showing another embodiment of the present invention.
【図５】図５は図４におけるＡ−Ａである。FIG. 5 is AA in FIG. 4.
【図６】図６は電気式温度計の基本構成を示す結線図出
ある。FIG. 6 is a connection diagram showing a basic configuration of an electric thermometer.
１，２…（温度検出用）異種金属材料、３…保護管、４
…補償導線、５…シールド線、１１…温度検出部、１２
…信号伝送部。1, 2 ... (for temperature detection) Dissimilar metal materials, 3 ... Protective tube, 4
... compensating lead wire, 5 ... shielded wire, 11 ... temperature detecting part, 12
… Signal transmission unit.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山口 修司 山口県下松市大字東豊井794番地 株式会 社日立製作所笠戸工場内 (72)発明者 原 徳明 山口県下松市大字東豊井794番地 株式会 社日立製作所笠戸工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Yamaguchi 794 Azuma Higashitoyo, Shimomatsu City, Yamaguchi Prefecture Inside the Kasado Plant, Hitachi Ltd. Company Hitachi Ltd. Kasado factory
Claims (2)
て、耐ノイズ性を高めるため、その２線をツイストペア
ー化し、かつ同軸ケーブル化したことを特徴とする耐ノ
イズ型温度計。1. A two-wire type thermometer such as a thermocouple type thermometer, wherein in order to improve noise resistance, the two wires are twisted paired and made into a coaxial cable.
熱電対等で発生した電気信号を伝える補償銅線を、ツイ
ストペアー化，同軸ケーブル化、または外部シールド
化、さらにはその各々を組合せたことを特徴とする請求
項１記載の耐ノイズ型温度計。2. A two-wire type thermometer such as a thermocouple thermometer,
2. The noise resistant thermometer according to claim 1, wherein a compensating copper wire for transmitting an electric signal generated by a thermocouple or the like is formed into a twisted pair, a coaxial cable, an external shield, or a combination thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22297294A JPH0886694A (en) | 1994-09-19 | 1994-09-19 | Noise resistant thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22297294A JPH0886694A (en) | 1994-09-19 | 1994-09-19 | Noise resistant thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0886694A true JPH0886694A (en) | 1996-04-02 |
Family
ID=16790781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22297294A Pending JPH0886694A (en) | 1994-09-19 | 1994-09-19 | Noise resistant thermometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0886694A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009058403A (en) * | 2007-08-31 | 2009-03-19 | Yamari Sangyo Kk | Thermocouple |
| JP2011045177A (en) * | 2009-08-20 | 2011-03-03 | Toyota Motor Corp | Stator, method of manufacturing the same, and rotary electric machine |
| CN102842201A (en) * | 2011-06-24 | 2012-12-26 | 无锡圣敏传感科技有限公司 | Linear temperature sensor capable of being self-adaptive to environmental variation and monitoring method thereof |
| RU2619360C1 (en) * | 2016-04-20 | 2017-05-15 | Акционерное общество "Научно-производственное объединение измерительной техники" | Device for measurement of temperature of gas flows |
| CN111060208A (en) * | 2020-01-19 | 2020-04-24 | 天津市旭永诚科技有限公司 | Noise-resistant thermocouple thermometer |
-
1994
- 1994-09-19 JP JP22297294A patent/JPH0886694A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009058403A (en) * | 2007-08-31 | 2009-03-19 | Yamari Sangyo Kk | Thermocouple |
| JP2011045177A (en) * | 2009-08-20 | 2011-03-03 | Toyota Motor Corp | Stator, method of manufacturing the same, and rotary electric machine |
| CN102842201A (en) * | 2011-06-24 | 2012-12-26 | 无锡圣敏传感科技有限公司 | Linear temperature sensor capable of being self-adaptive to environmental variation and monitoring method thereof |
| RU2619360C1 (en) * | 2016-04-20 | 2017-05-15 | Акционерное общество "Научно-производственное объединение измерительной техники" | Device for measurement of temperature of gas flows |
| CN111060208A (en) * | 2020-01-19 | 2020-04-24 | 天津市旭永诚科技有限公司 | Noise-resistant thermocouple thermometer |
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