JPH10325759A - Temperature sensor - Google Patents
Temperature sensorInfo
- Publication number
- JPH10325759A JPH10325759A JP13343897A JP13343897A JPH10325759A JP H10325759 A JPH10325759 A JP H10325759A JP 13343897 A JP13343897 A JP 13343897A JP 13343897 A JP13343897 A JP 13343897A JP H10325759 A JPH10325759 A JP H10325759A
- Authority
- JP
- Japan
- Prior art keywords
- insulation resistance
- temperature sensor
- thermocouple
- detecting
- 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.)
- Pending
Links
- 238000009413 insulation Methods 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 239000000395 magnesium oxide Substances 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910001006 Constantan Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Abstract
Description
【発明の属する技術分野】原子炉、宇宙・航空機器、石
油精製、各種燃焼機器等に於ける温度の測定・管理に必
要な温度センサに関するものであり、詳しくは精密な温
度測定を必要とする際の温度センサ内部に於ける絶縁抵
抗の低下を検知する温度センサに係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature sensor required for measuring and managing temperatures in a nuclear reactor, aerospace equipment, petroleum refining, various kinds of combustion equipment, and the like, and more specifically, requires a precise temperature measurement. The present invention relates to a temperature sensor for detecting a decrease in insulation resistance inside the temperature sensor at the time.
【従来の技術】本発明に於けるが如き温度センサの使用
時に随時、温度センサ内部の絶縁抵抗を検知し得る温度
センサは無く、温度センサ内部の絶縁抵抗低下の経時変
化は定期又は不定期の点検期間中に温度センサの導線を
受信計器から外して、この導線とシ−ス間もしくは２つ
のエレメントが１つのシ−ス内に収容され、互に絶縁さ
れている場合は導線間の絶縁抵抗を絶縁抵抗計にて計測
して１００メグオ−ム等の「シ−ス熱電対ＪＩＳＣ１６
０５−１９９５」、「測温抵抗体ＪＩＳＣ１６０４−１
９９７」の日本工業規格の基準を充たすかどうかを確認
し、充たさぬ時は良品と取り代える。2. Description of the Related Art When using a temperature sensor as in the present invention, there is no temperature sensor capable of detecting the insulation resistance inside the temperature sensor at any time. During the inspection period, the conductor of the temperature sensor is disconnected from the receiving instrument, and the insulation resistance between the conductor and the sheath or between the conductors when the two elements are housed in one sheath and insulated from each other. Is measured with an insulation resistance meter, and the measurement is performed using a 100-megohm,
05-1995 "," RTD JISC1604-1 "
Check if the product complies with the Japanese Industrial Standards of 997, and if not, replace it with a non-defective product.
【発明が解決しようとする課題】ステンレスやニツケル
・クロ−ムベ−スの耐熱合金製のシ−ス内に無機絶縁粉
末を充填して絶縁層を形成させ熱電対の素線又は測温抵
抗体の銅、ニツケル、コンスタンタン等の導線を挿通し
たシ−ス型温度センサにあつては使用時又保管時にシ−
ス内部の無機絶縁粉末の充填層が部分的又は全長にわた
つて吸湿して絶縁抵抗の低下を来たし、検出温度に差異
を生じ、リ−ク電流を生じる等の問題があつた。此の様
な検出温度の差異、リ−ク電流の発生は生産工程での温
度管理のミスによる不良品の発生等の重大な損失をもた
らすものである。そこで本発明に於いては、温度センサ
内部の絶縁の劣化を常時監視するとか、予告させること
が出来る温度センサの提供を目的としている。SUMMARY OF THE INVENTION A sheath made of a heat-resistant alloy such as stainless steel or nickel-chrome base is filled with an inorganic insulating powder to form an insulating layer, and a thermocouple element wire or a temperature measuring resistor is formed. When using or storing a sheath-type temperature sensor with a conductor such as copper, nickel or constantan
There is a problem that the filled layer of the inorganic insulating powder inside the heat sink absorbs moisture partially or over the entire length, lowering the insulation resistance, causing a difference in the detected temperature and causing a leak current. Such a difference in the detected temperature and the generation of a leakage current cause a serious loss such as the occurrence of a defective product due to a temperature control error in the production process. Therefore, an object of the present invention is to provide a temperature sensor capable of constantly monitoring the deterioration of the insulation inside the temperature sensor or giving a notice.
【課題を解決する手段】そこで本発明の特許請求の範囲
に記載の如く、熱電対又は測温抵抗体の感温部と感温部
に繋がるリ−ド部の導線と並列して別個の金属素線を配
置し、無機絶縁粉末中に埋設し、金属シ−ス内に収容し
て温度センサとした。本発明の上記の温度センサでは熱
電対又は測温抵抗体の素線を計器に接続する端末もしく
はシ−スと接続された導線の端末と前記の並列して配置
した金属素線の端末を絶縁抵抗を測定する計器に接続し
て温度センサ内部の絶縁抵抗を計測し、この絶縁抵抗の
値が許容し得るものかどうかの判断をして、前述の危険
の発生を防止する。Accordingly, as described in the claims of the present invention, a separate metal is provided in parallel with the thermocouple or the lead wire connected to the lead portion connected to the temperature sensing portion of the temperature measuring resistor. The element wire was arranged, buried in an inorganic insulating powder, and housed in a metal sheath to form a temperature sensor. In the above-mentioned temperature sensor of the present invention, the terminal for connecting the element wire of the thermocouple or the resistance temperature detector to the instrument or the terminal of the wire connected to the sheath and the terminal of the metal element wire arranged in parallel are insulated. The insulation resistance inside the temperature sensor is measured by connecting to an instrument for measuring the resistance, and it is determined whether or not the value of the insulation resistance is acceptable, thereby preventing the occurrence of the above-mentioned danger.
【実施例】本発明の実施例を添付した図面に基づいて説
明する。図２．に於いては本発明の実施例を示して居
り、金属シ−ス１．内に充填されている無機絶縁粉末層
２．と図２Ｒでは測温抵抗体の導線３ａ．と図２Ｔでは
熱電対の素線３ｂ．は従来の温度センサと同様である
が、本発明に於ける絶縁抵抗を検知する金属素線４．を
測温抵抗体の導線３ａ，又は熱電対素線３ｂ．に並列し
て無機絶縁層２．中に埋設しいることを示して居り、絶
縁抵抗を検知する金属素線４．の計器側端子Ｃ，金属シ
−ス１の計器側端子（ア−ス）Ｄとの間で抵抗を測定す
る、もしくは測温抵抗体の導線３ａ．又は熱電体の素線
３ｂ．と絶縁抵抗を検知する金属素線４．との間で抵抗
を測定する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention. 1. Inorganic insulating powder layer filled in And FIG. 2R, lead wires 3a. And FIG. 2T, the thermocouple strands 3b. Is the same as the conventional temperature sensor, but the metal wire for detecting the insulation resistance in the present invention. Is connected to the lead wire 3a of the resistance thermometer or the thermocouple wire 3b. Inorganic insulating layer in parallel with 2. 3. Metal wires that are buried inside and detect insulation resistance The resistance is measured between the instrument side terminal C of the metal sheath 1 and the instrument side terminal (earth) D of the metal sheath 1, or the lead wires 3a. Or a thermoelectric element wire 3b. 3. Metal wire for detecting insulation resistance Measure resistance between.
【発明の効果】従来は定期もしくは不定期の点検時に熱
電対又は測温抵抗体の温度センサ部分を機械・装置の設
置箇所から外し、個々の温度センサについて絶縁抵抗を
測り、予め設定した絶縁抵抗の限界値を下廻る温度セン
サは取り替え、再度使用可能なものは再び結線と固定設
置の作業を必要とした。本発明に於いては熱電対の素線
又は測温抵抗体の導線と絶縁抵抗検知用の金属素線の計
器側の端子を露出して絶縁抵抗計器の端末と接続して絶
縁抵抗の低下を検知することが出来、機械・装置及び操
業の休止を行うことなく各温度センサの個々の絶縁抵抗
の状態を常時監視することが出来る。全温度センサと全
絶縁抵抗検知用の金属素線の端子を接続する電気回路を
設うけて置いてこの回路を個々の温度センサについて開
・閉することで一括して点検することが可能である。以
上の如く大きく作業の手数と経費、時間を削減し得るも
のである。Conventionally, at the time of regular or irregular inspection, the temperature sensor portion of the thermocouple or the resistance temperature detector is removed from the place where the machine / device is installed, the insulation resistance of each temperature sensor is measured, and the insulation resistance set in advance is determined. Temperature sensors below the limit value were replaced, and those that could be used again required the work of connection and fixed installation again. In the present invention, the terminal of the thermocouple element wire or the lead wire of the resistance thermometer and the metal element wire for insulation resistance detection on the instrument side are exposed and connected to the terminal of the insulation resistance instrument to reduce the insulation resistance. Detection can be performed, and the state of the individual insulation resistance of each temperature sensor can be constantly monitored without stopping the machine / apparatus and operation. It is possible to check all the temperature sensors by opening and closing each temperature sensor by installing an electric circuit that connects all the temperature sensors and the terminals of all metal wires for detecting the insulation resistance. . As described above, the number of operations, cost and time can be greatly reduced.
【図１】温度センサＳと接続する受信計器との全体的構
成を示し、温度センサとして測抵抗体を用いた場合Ｒと
熱電対を用いた場合Ｔの受信計器の端末を示している。FIG. 1 shows an overall configuration of a receiving instrument connected to a temperature sensor S, and shows terminals of the receiving instrument in the case of using a resistance thermometer as a temperature sensor and in the case of using a thermocouple as a temperature sensor.
【図２】シ−ス型温度センサＳの測温抵抗体Ｒと熱電対
Ｔの断面の詳細を示している。FIG. 2 shows details of a cross section of a resistance thermometer R and a thermocouple T of a sheath type temperature sensor S.
１・・・・・ 金属シ−ス ２・・・・・ 無機絶縁粉末層 ３ａ・・・・ 測温抵抗体の導線 ３ｂ・・・・ 熱電対の素線 ４・・・・・ 絶縁抵抗検出素線 Ｓ・・・・・ 温度センサ Ｒ・・・・・ 測温抵抗体 Ｔ・・・・・ 熱電対 1 ... Metal sheath 2 ... Insulating powder layer 3a ... Conductor wire of resistance thermometer 3b ... Thermocouple wire 4 ... Insulation resistance detection Wire S ... Temperature sensor R ... Resistance temperature detector T ... Thermocouple
Claims (1)
繋がるリ−ド部をマグネシア、アルミナ、シリカ等の無
機絶縁粉末中に埋設し、金属シ−ス内に充填して収容し
てなる温度センサにあつて、熱電対の素線又は測温抵抗
体の導線と並列して別個に一本又は複数本の金属素線を
配置して温度センサ内部の絶縁抵抗の低下を検知し得る
ことを特徴とする温度センサ。A thermocouple and a temperature sensing part of a thermocouple and a lead part connected to the temperature sensing part are buried in an inorganic insulating powder of magnesia, alumina, silica or the like, and filled in a metal sheet. For a temperature sensor housed in a housing, one or more metal wires are separately arranged in parallel with the wires of the thermocouple or the wires of the resistance thermometer to reduce the insulation resistance inside the temperature sensor. A temperature sensor capable of detecting a temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13343897A JPH10325759A (en) | 1997-05-23 | 1997-05-23 | Temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13343897A JPH10325759A (en) | 1997-05-23 | 1997-05-23 | Temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10325759A true JPH10325759A (en) | 1998-12-08 |
Family
ID=15104782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13343897A Pending JPH10325759A (en) | 1997-05-23 | 1997-05-23 | Temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10325759A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7891870B2 (en) | 2008-04-29 | 2011-02-22 | Ngk Spark Plug Co., Ltd. | Temperature sensor element and method of manufacturing the same |
| WO2018031882A1 (en) * | 2016-08-12 | 2018-02-15 | Daily Thermetrics, Corp. | Mineral insulated sheathed assembly with grounded and ungrounded temperature sensors |
| US10288490B2 (en) | 2016-05-11 | 2019-05-14 | Daily Thermetrics Corp. | Mineral insulated sheathed assembly with grounded and ungrounded temperature sensors |
| US10295491B2 (en) | 2016-05-11 | 2019-05-21 | Daily Instruments | Mineral insulated sheathed assembly with insulation resistance indicator |
| US11408779B2 (en) | 2019-06-03 | 2022-08-09 | Daily Thermetrics Corporation | Temperature sensor and methods of use |
-
1997
- 1997-05-23 JP JP13343897A patent/JPH10325759A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7891870B2 (en) | 2008-04-29 | 2011-02-22 | Ngk Spark Plug Co., Ltd. | Temperature sensor element and method of manufacturing the same |
| US10288490B2 (en) | 2016-05-11 | 2019-05-14 | Daily Thermetrics Corp. | Mineral insulated sheathed assembly with grounded and ungrounded temperature sensors |
| US10295491B2 (en) | 2016-05-11 | 2019-05-21 | Daily Instruments | Mineral insulated sheathed assembly with insulation resistance indicator |
| US10634564B2 (en) | 2016-05-11 | 2020-04-28 | Daily Thermetrics Corporation | Mineral insulated sheathed assembly with grounded and ungrounded temperature sensors |
| US10663421B2 (en) | 2016-05-11 | 2020-05-26 | Daily Thermetrics Corporation | Mineral insulated sheathed assembly with insulation resistance indicator |
| US10962421B2 (en) | 2016-05-11 | 2021-03-30 | Daily Instruments | Mineral insulated sheathed assembly with grounded and ungrounded temperature sensors |
| WO2018031882A1 (en) * | 2016-08-12 | 2018-02-15 | Daily Thermetrics, Corp. | Mineral insulated sheathed assembly with grounded and ungrounded temperature sensors |
| US11408779B2 (en) | 2019-06-03 | 2022-08-09 | Daily Thermetrics Corporation | Temperature sensor and methods of use |
| US11747214B2 (en) | 2019-06-03 | 2023-09-05 | Daily Thermetrics Corporation | Temperature sensor and methods of use |
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