JPH06100509B2 - Abnormal temperature position detection system - Google Patents
Abnormal temperature position detection systemInfo
- Publication number
- JPH06100509B2 JPH06100509B2 JP61103536A JP10353686A JPH06100509B2 JP H06100509 B2 JPH06100509 B2 JP H06100509B2 JP 61103536 A JP61103536 A JP 61103536A JP 10353686 A JP10353686 A JP 10353686A JP H06100509 B2 JPH06100509 B2 JP H06100509B2
- Authority
- JP
- Japan
- Prior art keywords
- abnormal temperature
- conductor
- parts
- weight
- position detection
- 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.)
- Expired - Lifetime
Links
- 230000002159 abnormal effect Effects 0.000 title claims description 21
- 238000001514 detection method Methods 0.000 title claims description 15
- 239000004020 conductor Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
- Fire Alarms (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、洞道内地中ケーブルの異常加熱あるいはホテ
ルの各部屋の火災検知など、広い検知範囲における異常
温度発生位置を簡易な構成によって適確に検知し警報を
発し得る異常温度位置検知システムに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is suitable for the abnormal temperature generation position in a wide detection range such as abnormal heating of underground cable in a cave or detection of fire in each room of a hotel with a simple configuration. The present invention relates to an abnormal temperature position detection system capable of accurately detecting and issuing an alarm.
［従来の技術と問題点］ 前記した洞道内地中ケーブルやホテルの火災などは、い
ったん事故が発生すると重大事態に発展するおそれがあ
るために、異常温度検知用のセンサーを配置しておき、
事故の発生を未然に防止することが行なわれている。[Conventional Technology and Problems] Since the underground cable in the cave and the fire of the hotel described above may develop into a serious situation once an accident occurs, a sensor for abnormal temperature detection is arranged,
Preventing the occurrence of accidents is being carried out.
上記のような異常温度検知用センサーとして従来知られ
ているものは、熱電対、バイメタル、記憶合金、あるい
は温度ヒューズなどであった。The conventionally known sensors for detecting abnormal temperature as described above have been thermocouples, bimetals, memory alloys, or thermal fuses.
そして、これらの感温部は仮に線状に構成されたもので
あっても、異常の発生は検知できても過熱場所まで検知
できるものではなかった。Further, even if these temperature sensing parts are linearly configured, the occurrence of an abnormality can be detected, but it is not possible to detect even an overheated place.
このため、過熱場所をも知るために、上記の点センサー
を多数配置しておいて、異常温度の発生を遠隔で集中監
視しようとする試みもなされているが、そのためには例
えば前記地中ケーブルの場合はケーブルに沿ってなるべ
く多くの個所へのセンサーの配置を、それがホテルであ
れば数十部屋以上にも及ぶセンサーの配置を必要とし、
これらを結合する配線が複雑化し全体に高価なものとな
ることは否めなかった。For this reason, in order to know the location of overheating, it has been attempted to arrange a large number of the above point sensors and remotely monitor the occurrence of abnormal temperature in a centralized manner. In the case of, it is necessary to arrange sensors in as many places as possible along the cable, and if it is a hotel, it is necessary to arrange sensors in dozens of rooms or more,
It is undeniable that the wiring connecting these becomes complicated and the overall cost becomes high.
［発明の目的］ 本発明は上記のような実情にかんがみてなされたもので
あり、異常検知点の数が増加しても同一システムを用い
て連続してモニターすることができるとともに、その異
常の発生点までも判定できる新規な異常温度位置検知シ
ステムを提供しようとするものである。[Object of the Invention] The present invention has been made in view of the above situation, and even if the number of abnormality detection points increases, it is possible to continuously monitor using the same system and to detect the abnormality. It is intended to provide a new abnormal temperature position detection system capable of determining even a generation point.
［発明の概要］ 即ち、本発明の要旨とするところは、等しい長さの導線
が並設された二導線と、該二導線の間に加熱によって絶
縁抵抗が大幅に減少する感温機能を有する主要材料がエ
チレン38重量部に対して酢酸ビニル32重量部及びカーボ
ン30重量部を含む絶縁材である並列抵抗素子とが設けら
れて構成された分布定数系二導線を、異常点を検出した
い部分に配線すると共に、該分布定数系二導線の両端に
ほぼ同一の電圧を印加してなり、前記一方の導線の始端
から流入する電流をI1、該一方の導線の他端から流入す
る電流をI2、始端から加熱によって前記並列抵抗素子の
抵抗値が大幅に低下した位置までの距離をＸ、導線の長
さをＬとした場合、前記I1、I2のいずれか一方が所定の
しきい値を越えたとき、 Ｘ＝LI1/(I1+I2) なる関係を演算する計算回路によって、前記異常温度位
置Ｘを検知してＸを表示すると共に、警報及び伝送回路
に出力するようにしたことを特徴とする異常温度位置検
知システム。にあり、これにより単に往復二導線の配置
という簡単な配線により異常発生点を適確に検知するこ
とが可能となり、前記複雑かつ高価な従来システムに比
較して格段に簡易かつ安価な異常位置検知システムを提
供することを可能としたものである。[Summary of the Invention] That is, the gist of the present invention is to have a two-conductor wire in which conductor wires of equal length are arranged in parallel, and to have a temperature-sensing function in which insulation resistance is significantly reduced by heating between the two conductor wires. The main part is a distributed constant system two-conductor wire that is composed of a parallel resistance element that is an insulating material containing 32 parts by weight of vinyl acetate and 30 parts by weight of carbon for 38 parts by weight of ethylene. The distributed constant system two conductors are connected to each other at substantially the same voltage, and the current flowing from the starting end of the one conducting wire is I 1 , and the current flowing from the other end of the one conducting wire is I 2, and a distance to a position where the resistance value is greatly reduced in the parallel resistive element by heat from the starting X, the length of the wire is L, the I 1, either a predetermined tooth of I 2 when exceeding the threshold, Starring the X = LI 1 / (I 1 + I 2) the relationship The calculating circuit for said detects the abnormal temperature position X displays an X, alarm and abnormal temperature position sensing system being characterized in that so as to output to the transmission circuit. This makes it possible to accurately detect an abnormality occurrence point by simple wiring such as simply arranging two reciprocating wires, which is much easier and cheaper than the complicated and expensive conventional system. It is possible to provide a system.
［実施例］ 以下に本発明の一実施例について説明する。[Example] An example of the present invention will be described below.
第１図は本発明に係る異常温度位置検知システムの一実
施例を示す説明図である。FIG. 1 is an explanatory view showing an embodiment of an abnormal temperature position detection system according to the present invention.
全長がLmの二導線系の往復導体１および２のそれぞれの
導体の1m当りの抵抗がそれぞれr1、r2であり、この二導
体の間に設置された加熱により電気抵抗が大幅に減少す
るように構成されている並列抵抗素子3,3の平常時の抵
抗がR0であるとする。The resistance per 1 m of the conductors of the two-conductor system 1 and 2 having a total length of Lm is r 1 and r 2 , respectively, and the electrical resistance is greatly reduced by the heating installed between these two conductors. It is assumed that the resistance of the parallel resistance elements 3 and 3 configured as above in normal times is R 0 .
しかして、二導線系の始端の電圧４をV1、これにほぼ等
しい他端の電圧４′をV2、それによって流入する電流5,
5′をそれぞれI1、I2とする。Then, the voltage 4 at the beginning of the two-conductor system is V 1 , the voltage 4'at the other end, which is almost equal to this, is V 2 , and the current 5 flowing in by this,
Let 5 ′ be I 1 and I 2 , respectively.
いま、始端よりXm点の並列抵抗が加熱により大幅に減少
してRSになったとする。Now, suppose that the parallel resistance at the point Xm from the starting point is significantly reduced to R S due to heating.
前記R0がRSに比べて十分に大きく、計算上無視されると
きは次式が成り立つ。When R 0 is sufficiently larger than R S and is ignored in calculation, the following equation holds.
Xr1I1+RS(I1+I2)+Xr2I1＝V1 （Ｌ−Ｘ）r1I2+RS(I1+I2)+(L-X)r2I2＝V2 …（１） （１）式の差をとれば Ｘ(r1+r2)(I1+I2)＝Ｌ(r1+r2)I2+(V1-V2) …（２） したがって、 Ｘ＝LI2/(I1+I2)+(V1-V2)/(r1+r2)(I1+I2) …（３） V1とV2はほぼ等しいので (V1-V2)/(r1+r2)(I1+I2)＝Δε …（４） とおけば、（３）式は Ｘ＝LI2/(I1+I2)＋Δε …（５） となる。Xr 1 I 1 + R S (I 1 + I 2 ) + Xr 2 I 1 = V 1 (L−X) r 1 I 2 + R S (I 1 + I 2 ) + (LX) r 2 I 2 ＝ V 2 (1) X (r 1 + r 2 ) (I 1 + I 2 ) = L (r 1 + r 2 ) I 2 + (V 1 -V 2 ) ... (2) Therefore, X = LI 2 / (I 1 + I 2 ) + (V 1 -V 2 ) / (r 1 + r 2 ) (I 1 + I 2 ) ... (3) V 1 and V 2 are Since they are almost equal, (V 1 -V 2 ) / (r 1 + r 2 ) (I 1 + I 2 ) = Δε (4), the equation (3) becomes X = LI 2 / (I 1 + I 2 ) + Δε (5)
Δεが零か非常に小さな値になるように回路を選べば、
異常温度の場所はI1とI2より（５）式で求まることにな
る。（ただし、Δε≒０） 検出方法としては、I1、I2のどちらかがあるしきい値を
越えたとき、第２図のようにI1とI2を計算回路に導入し
Ｘを表示すると共に警報及び伝送回路に出力するように
する。If you choose the circuit so that Δε is zero or a very small value,
The location of the abnormal temperature can be obtained from I 1 and I 2 by the equation (5). (However, Δε ≈ 0) As a detection method, when either I 1 or I 2 exceeds a certain threshold value, I 1 and I 2 are introduced into the calculation circuit as shown in Fig. 2 and X is displayed. And output to the alarm and transmission circuit.
第３図は上記のようにして異常温度発生位置Ｘを検知す
るための分布定数系二導線の二様の具体的構成を示すも
のであり、第３図（ａ）は平行二線よりなる二導線6,6
を絶縁材７により図のように被覆保持している例が示さ
れており、第３図（ｂ）は内部導体６と外部導体８によ
り二導線系を構成し、当該内部導体６と外部導体８の間
に絶縁材７が配置された同軸構成の例が示されている。FIG. 3 shows two specific configurations of the distributed constant system two-conductor wire for detecting the abnormal temperature occurrence position X as described above. FIG. 3 (a) shows two parallel conductor wires. Conductor 6,6
An example in which the insulating material 7 is covered and held as shown in FIG. 3 is shown in FIG. 3 (b). The inner conductor 6 and the outer conductor 8 constitute a two-conductor system. An example of a coaxial configuration is shown in which an insulating material 7 is placed between 8.
上記第３図において使用される絶縁材７としては例えば
第４図に示す材料が使用される。As the insulating material 7 used in FIG. 3, the material shown in FIG. 4 is used, for example.
すなわち、第４図は具体例としてエチレン38％、酢酸ビ
ニル32％、カーボン30％の組成よりなる材料の温度−絶
縁抵抗特性を示す線図である。That is, FIG. 4 is a diagram showing a temperature-insulation resistance characteristic of a material having a composition of ethylene 38%, vinyl acetate 32% and carbon 30% as a specific example.
この材料は図にみるように常温で106Ω/mあった絶縁抵
抗が温度上昇と共に急速に低下していることがよくわか
る。As shown in the figure, it can be clearly seen that the insulation resistance of this material, which was 10 6 Ω / m at room temperature, rapidly decreased with increasing temperature.
従って前記関係式を満足せしめるに十分な材料であるこ
とがわかる。Therefore, it can be seen that the material is sufficient to satisfy the above relational expression.
尚、本実施例において二導線の両端からほぼ同一の電圧
を印加しているのは、万が一導線の切断事故等があった
場合、一端からのみ電圧を印加したシステムでは導線の
切断点より以遠の異常温度位置検知システムが作動しな
くなってしまい、その位置で火災などの事故が発生した
としてもそれを検知することが不可能であるため極めて
重大な事態に発展するおそれがあるが、本実施例のよう
に電圧を両端から印加すれば、万が一断線事故が発生し
ても導線の両端から火災事故の発生が検知できるもので
あり、フェイルセーフ機能を持たせることができるため
である。In the present embodiment, the substantially same voltage is applied from both ends of the two conductors in the case where there is an accident such as disconnection of the conductor, in a system in which voltage is applied only from one end, the distance from the disconnection point of the conductor is farther. If the abnormal temperature position detection system stops working and an accident such as a fire occurs at that position, it is impossible to detect it, which may lead to a very serious situation. This is because if a voltage is applied from both ends as described above, the occurrence of a fire accident can be detected from both ends of the conducting wire even if a disconnection accident should occur, and a fail-safe function can be provided.
又、本実施例において加熱によって絶縁抵抗が大幅に減
少する感温機能を有す絶縁材として、主要材料がエチレ
ン38重量部に対して酢酸ビニル32重量部及びカーボン30
重量部を含む絶縁材を使用しているのは、通常の絶縁電
線の製造と同様に、押出機により簡単に押出しでき、製
造が容易であると共に製造コストも安価なためである。Further, in this example, as an insulating material having a temperature-sensing function in which the insulation resistance is greatly reduced by heating, the main materials are ethylene 38 parts by weight, vinyl acetate 32 parts by weight and carbon 30
The reason why the insulating material containing the parts by weight is used is that it can be easily extruded by an extruder as in the case of manufacturing a normal insulated wire, and the manufacturing is easy and the manufacturing cost is low.
［発明の効果］ 以上、本発明に係る異常温度位置検知システムによれ
ば、異常点を検出したい部分に往復二導線を配置し、当
該二導線の間に分布定数系の加熱によって絶縁抵抗が大
幅に減少する並列抵抗素子を設置するという線状配置の
簡易な構成をもって、広い範囲における異常点の発生と
その位置を適確にかつ集中監視方式によって感知できる
ものであり、従来の複雑かつ高価なシステムに代えて簡
易安価なシステムを提供できる結果、これの採用が広く
一般化されることが期待できるものであって、事故発生
を未然に防止あるいは災害予防上に及ぼす本発明の有す
る意義はけだし大きなものがある。[Advantages of the Invention] As described above, according to the abnormal temperature position detection system of the present invention, a reciprocating two-conductor wire is arranged in a portion where an abnormal point is desired to be detected, and a distributed constant system is heated between the two conductor wires to significantly increase the insulation resistance. It is possible to detect the occurrence and location of abnormal points in a wide range accurately and by a centralized monitoring system with a simple configuration of a linear arrangement in which parallel resistance elements that decrease in number are installed. As a result of being able to provide a simple and inexpensive system in place of the system, it can be expected that its adoption will be widely generalized, and the significance of the present invention on the prevention of accident occurrence or on disaster prevention is bare. There is a big one.
第１図は本発明に係る異常温度位置検知システムの一実
施例を示す説明図、第２図は検出回路と表示警報回路の
構成を示すブロック図、第３図は本発明に係る検知導線
の二様の実施例を示す断面図、第４図は第３図の実施例
において使用される絶縁材の具体例の温度−絶縁抵抗特
性を示す線図である。 １、２、６、８……導線、 ３、７……加熱によって絶縁抵抗が大幅に減少する並列
抵抗素子。FIG. 1 is an explanatory view showing an embodiment of an abnormal temperature position detection system according to the present invention, FIG. 2 is a block diagram showing a configuration of a detection circuit and a display alarm circuit, and FIG. 3 is a detection lead wire according to the present invention. FIG. 4 is a sectional view showing two different examples, and FIG. 4 is a diagram showing temperature-insulation resistance characteristics of a specific example of the insulating material used in the example of FIG. 1, 2, 6, 8 ... Conductive wire, 3, 7 ... Parallel resistance element whose insulation resistance is significantly reduced by heating.
Claims (1)
該二導線の間に加熱によって絶縁抵抗が大幅に減少する
感温機能を有する主要材料がエチレン38重量部に対して
酢酸ビニル32重量部及びカーボン30重量部を含む絶縁材
である並列抵抗素子とが設けられて構成された分布定数
系二導線を、異常点を検出したい部分に配線すると共
に、該分布定数系二導線の両端にほぼ同一の電圧を印加
してなり、前記一方の導線の始端から流入する電流を
I1、該一方の導線の他端から流入する電流をI2、始端か
ら加熱によって前記並列抵抗素子の抵抗値が大幅に低下
した位置までの距離をＸ、導線の長さをＬとした場合、
前記I1、I2のいずれか一方が所定のしきい値を越えたと
き、 Ｘ＝LI1/(I1+I2) なる関係を演算する計算回路によって、前記異常温度位
置Ｘを検知してＸを表示すると共に、警報及び伝送回路
に出力するようにしたことを特徴とする異常温度位置検
知システム。1. A two-conductor wire in which conductor wires of equal length are arranged in parallel,
A parallel resistance element in which the main material having a temperature-sensing function in which the insulation resistance is significantly reduced by heating between the two wires is an insulating material containing 32 parts by weight of vinyl acetate and 30 parts by weight of carbon with respect to 38 parts by weight of ethylene, The distributed constant system two-conductor wire provided with is provided in a portion where an abnormal point is to be detected, and substantially the same voltage is applied to both ends of the distributed constant system two-conductor wire. The current flowing from
I 1 , the current flowing from the other end of the one conducting wire is I 2 , the distance from the starting end to the position where the resistance value of the parallel resistance element is significantly lowered by heating is X, and the length of the conducting wire is L ,
When either one of I 1 and I 2 exceeds a predetermined threshold value, the abnormal temperature position X is detected by a calculation circuit that calculates the relationship X = LI 1 / (I 1 + I 2 ). The abnormal temperature position detection system is characterized in that X is displayed on the screen and is output to the alarm and transmission circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61103536A JPH06100509B2 (en) | 1986-05-06 | 1986-05-06 | Abnormal temperature position detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61103536A JPH06100509B2 (en) | 1986-05-06 | 1986-05-06 | Abnormal temperature position detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62261076A JPS62261076A (en) | 1987-11-13 |
| JPH06100509B2 true JPH06100509B2 (en) | 1994-12-12 |
Family
ID=14356575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61103536A Expired - Lifetime JPH06100509B2 (en) | 1986-05-06 | 1986-05-06 | Abnormal temperature position detection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06100509B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9482714B2 (en) * | 2013-06-04 | 2016-11-01 | Kidde Technologies, Inc. | Systems and methods for overheat detection system event location |
| JP6698739B2 (en) * | 2018-05-16 | 2020-05-27 | ファナック株式会社 | Temperature abnormality detection system, temperature abnormality detection cable, cable |
| CN119335324B (en) * | 2024-12-19 | 2025-06-03 | 国网上海市电力公司 | High-resistance arc-light grounding fault diagnosis method and system based on edge calculation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5454876U (en) * | 1977-09-25 | 1979-04-16 | ||
| JPS55160822A (en) * | 1979-04-27 | 1980-12-15 | Furukawa Electric Co Ltd:The | Temperature detector |
| JPS58164126U (en) * | 1982-04-27 | 1983-11-01 | 秋本 強治 | Temperature sensing cable |
-
1986
- 1986-05-06 JP JP61103536A patent/JPH06100509B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62261076A (en) | 1987-11-13 |
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