JPS5920825A - Method for measuring temperature of cable conductor - Google Patents
Method for measuring temperature of cable conductorInfo
- Publication number
- JPS5920825A JPS5920825A JP13181782A JP13181782A JPS5920825A JP S5920825 A JPS5920825 A JP S5920825A JP 13181782 A JP13181782 A JP 13181782A JP 13181782 A JP13181782 A JP 13181782A JP S5920825 A JPS5920825 A JP S5920825A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- cable conductor
- solenoid coil
- measured
- resistance
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はケーブル導体の温度測定法に関し、特に、導体
温度を非接触状態で測定する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the temperature of a cable conductor, and particularly to a method for measuring the temperature of a conductor in a non-contact manner.
円筒型ソレノイドコイル内にケーブル導体を挿入シ、ル
ノイトコイル系のインダクタンス、実効抵抗の値が挿入
されるケーブル導体の温度により変化することを利用し
てケーブル温度を測定しようとする技術思想がこれまで
試みられてきた。Previous attempts have been made to measure the cable temperature by inserting a cable conductor into a cylindrical solenoid coil, and utilizing the fact that the inductance and effective resistance of the Lenoit coil system change depending on the temperature of the inserted cable conductor. I've been exposed to it.
しかしながら、この系のインダクタンス、実効抵抗は、
ケーブル導体の温度変化のみにより変化するだけでなく
、ソレノイドコイル自体の温度変化が影響し、特に、ソ
レノイドコイルと被測温ケーブル導体との電磁結合が疎
である場合（これは、一般的な結合関係でもある。）に
は、ソレノイドコイルの温度変化によるインダクタンス
等の変化が大きくなってしまい、ケーブル導体の測温を
高精度に保持することは困難であり、実用化に至ってい
ないのが現状である。However, the inductance and effective resistance of this system are
The change is not only caused by temperature changes in the cable conductor, but also by temperature changes in the solenoid coil itself, especially when the electromagnetic coupling between the solenoid coil and the cable conductor to be measured is weak (this is due to the general coupling ), the changes in inductance due to temperature changes in the solenoid coil become large, making it difficult to maintain high accuracy in temperature measurement of the cable conductor, and currently it has not been put into practical use. be.
従って、本発明の目的は、上述の如き従来技術において
実用化のだめに未解決であった点を解決し、ソレノイド
自体の温度変化によるケーブル導体の測温誤差を低減し
、ケーブル導体温度を非接触状態で測定できる方法を提
供することにある。Therefore, an object of the present invention is to solve the unresolved problems in the prior art as described above before practical application, reduce the temperature measurement error of the cable conductor due to temperature change of the solenoid itself, and measure the temperature of the cable conductor without contact. The objective is to provide a method that can measure the state.
本発明の要旨とするところは、導体測温のだめのソレノ
イドコイルに温度変化による実効抵抗の変化が相対的に
無視しえる程度に小さく、直流抵抗率の少々い金属電線
を適用することにあり、以下、本発明による実施例につ
いて図面に沿って説明する。The gist of the present invention is to apply a metal wire with a small direct current resistivity and a relatively small change in effective resistance due to temperature change to a solenoid coil for conductor temperature measurement. Embodiments according to the present invention will be described below with reference to the drawings.
第１図は本発明の実施例による測定法の概要を示す図で
、後述するように選定された金属材料からなる絶縁被覆
を施された金属電線１を中空円筒形体のボビン２上に巻
付けて円筒ソレノイドコイル３を作成する。ソレノイド
コイル３の金属電線１の両端はＬ−１’Ｌ測定器４に接
続され、それにより、金属電線１０両端からのソレノイ
ドコイル３のインダクタンスしおよび実効抵抗Ｒ，が測
定される０
被測温ケーブル導体５がソレノイドコイル３内を挿通さ
れ、そのときのケーブル導体５の温度によるソレノイド
コイル３のＬ −Ｒの変化を測定器４により計測され、
その１．−Ｒ変化量によりケーブル導体５の温度が測定
される。ここにおいて、一定周波数１の検出電流でソレ
ノイドコイル３のインダクタンスしおよび実効抵抗Ｒと
被測温ケーブル導体の温度Ｔとの関係を予め求めておく
ことにより、クープル導体温度を非接触状態で測定でき
る。しかしながら、ケーブル導体５の熱によりソレノイ
ドコイル３の温度ｔが変化されると金属電線１の固有の
抵抗温度係数αに追随してソレノイドコイル３の実効抵
抗Ｒが変化され、その分だけケーブル導体温度の測定誤
差となる。それ故、ソレノイドコイル用金属電線の金属
材料として抵抗温度係数αの小さいものが必要となる。FIG. 1 is a diagram showing an outline of a measurement method according to an embodiment of the present invention, in which a metal wire 1 coated with an insulation coating made of a metal material selected as described later is wound around a hollow cylindrical bobbin 2. Create the cylindrical solenoid coil 3. Both ends of the metal wire 1 of the solenoid coil 3 are connected to an L-1'L measuring device 4, which measures the inductance and effective resistance R of the solenoid coil 3 from both ends of the metal wire 10. The cable conductor 5 is inserted into the solenoid coil 3, and the change in L - R of the solenoid coil 3 due to the temperature of the cable conductor 5 at that time is measured by the measuring device 4.
Part 1. -The temperature of the cable conductor 5 is measured based on the amount of change in R. Here, by determining in advance the relationship between the inductance of the solenoid coil 3 and the effective resistance R and the temperature T of the cable conductor to be measured with a detection current of a constant frequency 1, the temperature of the couple conductor can be measured in a non-contact state. . However, when the temperature t of the solenoid coil 3 changes due to the heat of the cable conductor 5, the effective resistance R of the solenoid coil 3 changes in accordance with the inherent resistance temperature coefficient α of the metal wire 1, and the cable conductor temperature changes by that amount. This results in a measurement error of . Therefore, a metal material with a small resistance temperature coefficient α is required for the metal wire for the solenoid coil.
この要求に対ｊｔできる金属材料を選定するために、種
々の金属材料についてその実効抵抗（ここにおいては、
固有抵抗）ｒｔおよび抵抗温度係数αを計測し、抵抗温
度変化を示す両者の積（ＲＸＣ）を求めたところ、表１
のような結果を得た。In order to select a metal material that can meet this requirement, the effective resistance (here,
The specific resistance) rt and resistance temperature coefficient α were measured, and the product of both (RXC), which indicates the resistance temperature change, was calculated, and Table 1
I got a result like this.
この結果から、ソレノイドコイルの金属電線用金属材料
として、コンスタンタンやマンカ二ンが好適であること
が判明したが、その外に各種ニッケル合金材料も適用で
き、まだ、ケーブル導体からの熱によるソレノイドコイ
ルの温度変化領域に応じてその他の金属材料をも適当に
選定して用いるべきである。From these results, it has been found that constantan and mankanin are suitable as metal materials for the metal wires of solenoid coils, but various nickel alloy materials can also be used. Other metal materials should also be appropriately selected and used depending on the temperature change range.
第２図は第１図に示すソレノイドコイルのソレノイド端
からみた等価回路で、周波数ｆで測定されたコイル自体
の実効抵抗を”Ｉ ｓその温度係数をαｌとし、常温’
ｒｏにおける被測定ケーブル導体の実効抵抗分をＲ６、
ソレノイドコイルのインダクタンス分をＬとし、ここに
おいて、ケーブル導体の温度がＴ。からＴに上昇すると
、ソレノイドコイルの温度もまだそれによりＴｏからＴ
ｏ′に上昇することとなり、そのときのソレノイドコイ
ルの実効抵抗がｎ、からＲに変化するとすれば、それら
は次式のような関係を有する。Figure 2 is an equivalent circuit of the solenoid coil shown in Figure 1 seen from the solenoid end.
The effective resistance of the cable conductor under test at ro is R6,
The inductance of the solenoid coil is L, and the temperature of the cable conductor is T. When the temperature of the solenoid coil increases from To to T, the temperature of the solenoid coil also increases from To to T.
If the effective resistance of the solenoid coil at that time changes from n to R, then they have the following relationship.
ｎｏ−Ｉ’ｔ、子馬 ・・・・
・・（１）Ｒ−ａ、［ｔ＋α１（Ｔｏ’ ＴＯ） ：
］＋Ｆ （Ｒ−１Ｔ） ・・・−（２）式（２）におい
て、Ｒ，・α＋ （’ｒｏ’ −’ｒｏ） ＜ ＣＦ
（ｎｖ、’ｒ）−ｒｔ、）の関係を満足するようなα１
（これは、金属電線材料により特定される。）およびｒ
ｔ＋ （これは、金属電線の断面積に依存する。）てあ
れば、ソレノイドコイルの温度変化に影響されることな
しにケーブル導体の温度を求めることができる。丑だ、
Ｒ。no-I't, foal...
...(1) R-a, [t+α1(To'TO):
]+F (R-1T) ...-(2) In formula (2), R,・α+ ('ro'-'ro)< CF
α1 that satisfies the relationship (nv,'r)-rt,)
(This is specified by the metal wire material.) and r
t+ (which depends on the cross-sectional area of the metal wire), it is possible to determine the temperature of the cable conductor without being affected by temperature changes in the solenoid coil. It's ox.
R.
が低い価であれば、ケーブル導体の温度変化によるソレ
ノイドコイルの実効抵抗変化率（Ｒｌｔｏ’ Ｒｏ ）
が大きく取れ、測定精度を向上できる。If is a low value, the effective resistance change rate of the solenoid coil due to temperature change of the cable conductor (Rlto' Ro )
It is possible to obtain a large value and improve measurement accuracy.
上述の説明において、ケーブル導体を単体で測温するよ
う説明しだが、測定上、ソレノイドコイルの１、−Ｒに
実質的に影響を及ぼさない範囲でケーブル絶縁層や半導
電層、その他の遮蔽層を有するものでも測温でき、捷だ
、被測温物をある程度の速度で移動させて連続的に…１
１温することもでき、更に、被測温物としてケーブル導
体以外の金属体の測温にも適応できることに注目された
い。加えて、ソレノイドコイル自体の温度を別の適当な
手段で測定してＬ −Ｒ変化による測温結果を補正した
り、ソレノイドコイルを一定温度に保持するよう恒温手
段を設けたりすることにより、より高精度に測温できる
ことにも注目すべきである。In the above explanation, it is explained that the temperature of the cable conductor is measured by itself. Temperature measurement can be carried out even on objects with
It should be noted that it is also possible to measure the temperature of metal objects other than cable conductors as objects to be measured. In addition, by measuring the temperature of the solenoid coil itself with another appropriate means and correcting the temperature measurement result due to L - R change, or by providing a constant temperature means to maintain the solenoid coil at a constant temperature, the temperature can be improved. It should also be noted that temperature can be measured with high accuracy.
以上述べた如く、本発明によれば、被測温金属体の温度
を非接触状態で測温てきることにより、ケーブル導体の
測温のみでなく、種々の形体の金属体の温度を測定でき
、移動中における被測温金属体の温度をも連続的に測定
でき、まだ、ケーブル導体の通電中における測温をも可
能にするものである等、簡単な構成で簡便に測温できる
ものである。As described above, according to the present invention, by measuring the temperature of the metal body to be measured in a non-contact state, it is possible to measure not only the temperature of a cable conductor but also the temperature of metal bodies of various shapes. It has a simple configuration and can easily measure temperatures, such as being able to continuously measure the temperature of the metal object being measured while moving, and also making it possible to measure the temperature while the cable conductor is energized. be.
第１図は本発明の実施例による測定法の概要を示す図。
第２図は第１図に示すものの電気的等価回路。
１・・・金Ｍｔ線、２・・・ボビン、３・・・ソレノイ
ドコイル、４・・Ｌ −Ｒ測定器、５・・・被測温ケー
ブル導体。FIG. 1 is a diagram showing an outline of a measurement method according to an embodiment of the present invention. FIG. 2 is an electrical equivalent circuit of the one shown in FIG. DESCRIPTION OF SYMBOLS 1...Gold Mt wire, 2...Bobbin, 3...Solenoid coil, 4...L-R measuring device, 5...Temperature measurement cable conductor.
Claims (1)
りかつ固有抵抗と前記温度係数の積が５ Ｘ Ｉ Ｆ９
Ωｃｒｎ／℃以下である金属材料からなる金属電線によ
り形成される円筒型ソレノイドコイル内に被測温金属体
を非接触状態で挿入し、前記ソレノイドコイルのコイル
端からみたインダクタンスおよび実効抵抗の変化を測定
することにより、前記金属体の温度を測定することを特
徴とする温度測定法。(1) The temperature coefficient of resistance is 1 x 10-3/°C or less, and the product of the specific resistance and the temperature coefficient is 5 x I F9
A metal object to be measured is inserted in a non-contact state into a cylindrical solenoid coil formed of a metal wire made of a metal material with a temperature of Ωcrn/°C or less, and changes in inductance and effective resistance as seen from the coil end of the solenoid coil are measured. A temperature measuring method characterized in that the temperature of the metal body is measured by measuring the temperature of the metal body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13181782A JPS5920825A (en) | 1982-07-28 | 1982-07-28 | Method for measuring temperature of cable conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13181782A JPS5920825A (en) | 1982-07-28 | 1982-07-28 | Method for measuring temperature of cable conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5920825A true JPS5920825A (en) | 1984-02-02 |
| JPS6357724B2 JPS6357724B2 (en) | 1988-11-14 |
Family
ID=15066791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13181782A Granted JPS5920825A (en) | 1982-07-28 | 1982-07-28 | Method for measuring temperature of cable conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920825A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61215849A (en) * | 1985-03-19 | 1986-09-25 | Honda Motor Co Ltd | Tensioner apparatus in laying transmission apparatus for internal-combustion engine |
-
1982
- 1982-07-28 JP JP13181782A patent/JPS5920825A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61215849A (en) * | 1985-03-19 | 1986-09-25 | Honda Motor Co Ltd | Tensioner apparatus in laying transmission apparatus for internal-combustion engine |
| JPS6343618B2 (en) * | 1985-03-19 | 1988-08-31 | Honda Motor Co Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6357724B2 (en) | 1988-11-14 |
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