JPH06137956A - Multi-point temperature monitor having diagnosis function - Google Patents
Multi-point temperature monitor having diagnosis functionInfo
- Publication number
- JPH06137956A JPH06137956A JP4290318A JP29031892A JPH06137956A JP H06137956 A JPH06137956 A JP H06137956A JP 4290318 A JP4290318 A JP 4290318A JP 29031892 A JP29031892 A JP 29031892A JP H06137956 A JPH06137956 A JP H06137956A
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- Prior art keywords
- temperature
- thermocouple
- circuit
- measuring
- voltage
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉄鋼業における各種の
炉体(例えば高炉，転炉，電気炉等)に内張りされる耐火
物などの温度を多点で測定・監視する際に用いて好適の
多点温度監視装置に関し、特に劣化を診断する機能をそ
なえた多点温度監視装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for measuring and monitoring the temperatures of refractory materials lined in various furnace bodies (for example, blast furnace, converter, electric furnace, etc.) in the steel industry at multiple points. The present invention relates to a suitable multipoint temperature monitoring device, and more particularly to a multipoint temperature monitoring device having a function of diagnosing deterioration.
【０００２】[0002]
【従来の技術】従来の多点用温度監視装置は、例えば、
図２に示すように構成されている。この図２において、
１−１〜１−ｎはそれぞれ耐火物等の温度測定対象物内
の適当な位置に設置もしくは埋設される熱電対で、各熱
電対１−１〜１−ｎは、温度監視装置２の端子５−１〜
５−ｎにそれぞれ接続されている。また、温度監視装置
２内において、各熱電対１−１〜１−ｎからの信号は、
スキャン用の切替リレー３−１〜３−ｎを介して温度測
定回路４に接続されている。2. Description of the Related Art A conventional multipoint temperature monitoring device is, for example,
It is configured as shown in FIG. In this FIG.
Reference numerals 1-1 to 1-n are thermocouples installed or embedded at appropriate positions in a temperature measurement object such as a refractory, and each thermocouple 1-1 to 1-n is a terminal of the temperature monitoring device 2. 5-1
5-n, respectively. Further, in the temperature monitoring device 2, the signals from the thermocouples 1-1 to 1-n are
It is connected to the temperature measuring circuit 4 via the switching relays 3-1 to 3-n for scanning.
【０００３】上述の構成により、各熱電対１−１〜１−
ｎからの入力信号は、温度監視装置２内の各切替リレー
３−１〜３−ｎを一定時間の間だけシーケンシャルに順
次閉状態に切り替えることで、温度測定回路４に入力さ
れ、この温度測定回路４による測定結果が各熱電対１−
１〜１−ｎ毎の温度データとして順次外部へ出力され、
多点の温度監視が行なわれる。With the above configuration, each thermocouple 1-1 to 1-
The input signal from n is sequentially input to the temperature measuring circuit 4 by sequentially switching the switching relays 3-1 to 3-n in the temperature monitoring device 2 to the closed state for a certain period of time. The measurement result by the circuit 4 is the thermocouple 1-
It is sequentially output to the outside as temperature data for each 1 to 1-n,
Multipoint temperature monitoring is performed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述の
ような従来の多点温度監視装置では、各熱電対１−１〜
１−ｎが劣化すれば、正常な温度データが得られず、熱
電対１−１〜１−ｎの断線に至るまでの抵抗値変化によ
り誤った温度データが出力され、実際の温度との差異が
大きくなり、間違った判断をしたり、被測温箇所の適切
な状況判断を行なくなる場合があるため、各熱電対１−
１〜１−ｎの劣化状態を診断できるようにすることが望
まれている。However, in the conventional multipoint temperature monitoring apparatus as described above, each thermocouple 1-1 to 1-1 is used.
If 1-n deteriorates, normal temperature data cannot be obtained, and incorrect temperature data is output due to the change in resistance value until the thermocouple 1-1 to 1-n is disconnected, resulting in a difference from the actual temperature. May become incorrect, and it may not be possible to make an incorrect decision or to make an appropriate situation decision on the temperature-measured location.
It is desired to be able to diagnose deterioration states 1 to 1-n.
【０００５】本発明は、このような状況に鑑みてなされ
たもので、各熱電対の劣化状態を診断できるようにし
て、正常な温度測定データが得られているか否かの判断
を可能とし、信頼性の高い設備の運転，操業状態を維持
できる診断機能付き多点温度監視装置を提供することを
目的とする。The present invention has been made in view of such a situation, and makes it possible to diagnose the deterioration state of each thermocouple and to judge whether or not normal temperature measurement data is obtained, It is an object of the present invention to provide a multi-point temperature monitoring device with a diagnostic function that can maintain highly reliable equipment operation and operating conditions.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明の診断機能付き多点温度監視装置は、多数の
被測温箇所にそれぞれ熱電対を設け、各熱電対からの信
号に基づいて各被測温箇所の温度を測定する温度測定回
路をそなえてなるものにおいて、各熱電対の電圧を測定
することにより各熱電対の抵抗変化を測定しその抵抗変
化分を温度変換して出力する電圧測定回路と、前記温度
測定回路による温度測定値と前記電圧測定回路の温度変
換値との差を各熱電対毎に比較演算するための比較回路
と、この比較回路からの温度差が所定値よりも高くなっ
た場合に該当熱電対が劣化したものと判定する判定回路
とをそなえたことを特徴としている。In order to achieve the above object, a multi-point temperature monitoring apparatus with a diagnostic function of the present invention is provided with thermocouples at a number of locations to be measured, and signals from the thermocouples are provided. Based on a temperature measurement circuit that measures the temperature of each temperature measurement point based on the above, the resistance change of each thermocouple is measured by measuring the voltage of each thermocouple and the resistance change is converted into temperature. An output voltage measurement circuit, a comparison circuit for comparing and calculating the difference between the temperature measurement value by the temperature measurement circuit and the temperature conversion value of the voltage measurement circuit, and the temperature difference from this comparison circuit It is characterized by including a determination circuit for determining that the thermocouple has deteriorated when the value becomes higher than a predetermined value.
【０００７】[0007]
【作用】上述した本発明の診断機能付き多点温度監視装
置では、通常、温度測定回路により、各熱電対からの信
号に基づいて各被測温箇所の温度が測定されるが、これ
と同時に、電圧測定回路により、各熱電対の電圧が測定
され、その測定結果に基づいて各熱電対の抵抗変化が測
定され、その抵抗変化分が温度変換されて出力される。In the above-described multipoint temperature monitoring device of the present invention, the temperature measuring circuit normally measures the temperature at each temperature measurement point based on the signal from each thermocouple, but at the same time, The voltage of each thermocouple is measured by the voltage measuring circuit, the resistance change of each thermocouple is measured based on the measurement result, and the resistance change is temperature-converted and output.
【０００８】そして、比較回路により、温度測定回路に
よる温度測定値と電圧測定回路の温度変換値との差が各
熱電対毎に比較演算され、判定回路により、その温度差
が所定値よりも高くなった場合に該当熱電対が劣化した
ものと判定され、その判定結果が出力される。Then, the difference between the temperature measurement value of the temperature measurement circuit and the temperature conversion value of the voltage measurement circuit is compared and calculated by the comparison circuit for each thermocouple, and the temperature difference is higher than the predetermined value by the determination circuit. If it becomes, it is determined that the thermocouple has deteriorated, and the determination result is output.
【０００９】[0009]
【実施例】以下、図面により本発明の一実施例としての
診断機能付き多点温度監視装置について説明すると、図
１はその構成を示す図である。この図１に示すように、
本実施例においても、従来と同様に、熱電対１−１〜１
−ｎは、耐火物等の温度測定対象物内の適当な位置(多
数の被測温箇所)に設置もしくは埋設され、本実施例の
多点温度監視装置２Ａの端子５−１〜５−ｎにそれぞれ
接続されており、多点温度監視装置２Ａ内において、各
熱電対１−１〜１−ｎからの信号は、スキャン用の切替
リレー３−１〜３−ｎを介して温度測定回路４に接続さ
れている。そして、切替リレー３−１〜３−ｎを順次切
り替えることにより、温度測定回路４にて各熱電対１−
１〜１−ｎに基づいて各被測温箇所の温度が測定される
ようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multipoint temperature monitoring device with a diagnostic function as one embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration thereof. As shown in this FIG.
Also in the present embodiment, as in the conventional case, the thermocouples 1-1 to 1 are used.
-N is installed or embedded at an appropriate position (a large number of locations to be measured) in a temperature measurement object such as a refractory, and terminals 5-1 to 5-n of the multipoint temperature monitoring device 2A of the present embodiment. In the multipoint temperature monitoring device 2A, the signals from the thermocouples 1-1 to 1-n are connected to the temperature measurement circuit 4 via the scan switching relays 3-1 to 3-n. It is connected to the. Then, by sequentially switching the switching relays 3-1 to 3-n, each thermocouple 1-in the temperature measuring circuit 4.
The temperature at each temperature measurement point is measured based on 1 to 1-n.
【００１０】また、本実施例においては、各熱電対１−
１〜１−ｎは、多点温度監視装置２Ａの端子６−１〜６
−ｎにもそれぞれ接続されており、多点温度監視装置２
Ａ内において、スキャン用の切替リレー７−１〜７−ｎ
を介して電圧測定回路８に接続されている。各切替リレ
ー７−１〜７−ｎの切替動作(閉動作)は、それぞれ、前
述した切替リレー３−１〜３−ｎの切替動作(閉動作)に
全く同期して行なわれ、各熱電対１−１〜１−ｎの電圧
信号が電圧測定回路８に順次入力されるようになってい
る。Further, in this embodiment, each thermocouple 1-
1 to 1-n are terminals 6-1 to 6 of the multipoint temperature monitoring device 2A.
-N is also connected to each, and multi-point temperature monitoring device 2
Switching relays 7-1 to 7-n for scanning in A
It is connected to the voltage measuring circuit 8 via. The switching operation (closing operation) of each of the switching relays 7-1 to 7-n is performed in synchronism with the switching operation (closing operation) of each of the switching relays 3-1 to 3-n described above. The voltage signals 1-1 to 1-n are sequentially input to the voltage measuring circuit 8.
【００１１】ここで、電圧測定回路８は、各熱電対１−
１〜１−ｎからの電圧信号に基づいて各熱電対１−１〜
１−ｎの抵抗変化を測定し、その抵抗変化分を温度変換
して出力するもので、熱電対１−１〜１−ｎの断線等に
よる抵抗が増加することに着目し、電圧値を測定し各熱
電対１−１〜１−ｎの抵抗値を測定しようとするもので
ある。Here, the voltage measuring circuit 8 includes each thermocouple 1-
1-n based on the voltage signal from each thermocouple 1-1-
Measures the resistance change of 1-n, converts the resistance change into temperature, and outputs it. Focusing on the increase in resistance due to disconnection of thermocouples 1-1 to 1-n, measure the voltage value. However, the resistance value of each thermocouple 1-1 to 1-n is to be measured.
【００１２】そして、温度測定回路４の温度測定値は、
温度測定結果として多点温度監視装置２Ａの外部へ出力
されるほか、電圧測定回路８からの温度変換値とともに
比較回路９に入力されるようになっている。この比較回
路９は、温度測定回路４による温度測定値と電圧測定回
路８からの温度変換値との差を各熱電対１−１〜１−ｎ
毎に比較演算するためのものである。The temperature measurement value of the temperature measuring circuit 4 is
The temperature measurement result is output to the outside of the multipoint temperature monitoring device 2A, and is also input to the comparison circuit 9 together with the temperature conversion value from the voltage measurement circuit 8. The comparison circuit 9 calculates the difference between the temperature measurement value obtained by the temperature measurement circuit 4 and the temperature conversion value obtained by the voltage measurement circuit 8 in each thermocouple 1-1 to 1-n.
It is for comparison calculation for each.
【００１３】また、比較回路９には判定回路１０が接続
されている。この判定回路１０は、比較回路９からの温
度差が所定値(予め定められた熱電対１−１〜１−ｎの
抵抗値)よりも高くなった場合に、該当熱電対１−１〜
１−ｎが劣化したものと判定するもので、劣化したもの
があった場合には警報信号を出力するようになってい
る。なお、前記所定値は、温度計の精度，外乱要因，熱
電対劣化時の抵抗変化特性等を加味した温度差劣化設定
値として設定される。A decision circuit 10 is connected to the comparison circuit 9. When the temperature difference from the comparison circuit 9 becomes higher than a predetermined value (a predetermined resistance value of the thermocouples 1-1 to 1-n), the determination circuit 10 applies the thermocouples 1-1 to 1-1.
It is determined that 1-n has deteriorated, and if there is any deterioration, an alarm signal is output. The predetermined value is set as a temperature difference deterioration set value that takes into consideration the accuracy of the thermometer, disturbance factors, resistance change characteristics during thermocouple deterioration, and the like.
【００１４】上述の構成により、本実施例においても、
通常は、従来と同様に、各熱電対１−１〜１−ｎからの
入力信号が、多点温度監視装置２Ａ内の各切替リレー３
−１〜３−ｎを一定時間の間だけシーケンシャルに順次
閉状態に切り替えることで、温度測定回路４に入力さ
れ、この温度測定回路４による測定結果が各熱電対１−
１〜１−ｎ毎の温度データとして多点温度監視装置２Ａ
の外部へ順次出力され、多点の温度監視が行なわれる。With the above-mentioned structure, the present embodiment also has
Normally, as in the conventional case, the input signals from the thermocouples 1-1 to 1-n are transmitted to the switching relays 3 in the multipoint temperature monitoring device 2A.
By sequentially switching the -1 to 3-n to the closed state sequentially for a fixed time, the temperature measurement circuit 4 is input, and the measurement result by the temperature measurement circuit 4 is obtained by each thermocouple 1-.
Multipoint temperature monitoring device 2A as temperature data for each 1 to 1-n
Are sequentially output to the outside, and multipoint temperature monitoring is performed.
【００１５】一方、本実施例では、多点の温度監視を行
なうと同時に、各切替リレー３−１〜３−ｎの切替動作
に全く同期して多点温度監視装置２Ａ内の各切替リレー
７−１〜７−ｎを順次閉状態に切り替え、各熱電対１−
１〜１−ｎからの電圧信号が電圧測定回路８に入力され
る。On the other hand, in this embodiment, at the same time as monitoring the temperature at multiple points, each switching relay 7 in the multipoint temperature monitoring device 2A is synchronized with the switching operation of each switching relay 3-1 to 3-n. -1 to 7-n are sequentially switched to the closed state, and each thermocouple 1-
The voltage signals from 1 to 1-n are input to the voltage measuring circuit 8.
【００１６】この電圧測定回路８により、各熱電対１−
１〜１−ｎの電圧が測定され、その測定結果に基づいて
各熱電対１−１〜１−ｎの抵抗変化が測定され、その抵
抗変化分が温度変換されて出力される。By means of this voltage measuring circuit 8, each thermocouple 1-
The voltages of 1 to 1-n are measured, the resistance change of each thermocouple 1-1 to 1-n is measured based on the measurement result, and the resistance change is temperature-converted and output.
【００１７】そして、比較回路９により、温度測定回路
４による温度測定値と電圧測定回路８の温度変換値との
差が各熱電対１−１〜１−ｎ毎に比較演算され、判定回
路１０により、その温度差が所定値よりも高くなった場
合に該当熱電対１−１〜１−ｎが劣化したものと判定さ
れ、劣化したものがあると警報信号が出力される。Then, the comparison circuit 9 compares and calculates the difference between the temperature measurement value of the temperature measurement circuit 4 and the temperature conversion value of the voltage measurement circuit 8 for each thermocouple 1-1 to 1-n. Thus, when the temperature difference becomes higher than a predetermined value, it is determined that the corresponding thermocouple 1-1 to 1-n has deteriorated, and if there is any deterioration, an alarm signal is output.
【００１８】このように、本実施例の診断機能付き多点
温度監視装置によれば、比較演算したデータが予め定め
られた熱電対１−１〜１−ｎの抵抗値よりも高いことを
判定する回路８〜１０を有し、正常な場合は繰り返し温
度監視を行ない、設定値よりも抵抗値が高く(温度差が
高く)なれば警報信号を出力するように構成したので、
温度測定値利用者は、熱電対１−１〜１−ｎのいずれが
劣化してもその劣化状態を容易に知ることができる。As described above, according to the multipoint temperature monitoring apparatus with the diagnostic function of this embodiment, it is determined that the data obtained by the comparison calculation is higher than the predetermined resistance values of the thermocouples 1-1 to 1-n. Since it has the circuits 8 to 10 that perform the temperature monitoring repeatedly in the normal case and output the alarm signal when the resistance value is higher than the set value (the temperature difference is high),
The user of the measured temperature value can easily know the deterioration state of any of the thermocouples 1-1 to 1-n.
【００１９】従って、各熱電対１−１〜１−ｎの劣化状
態が早期に発見可能となり、警報信号が出力されない限
り、常に正常な温度測定データのみを利用することがで
き、信頼性の高い設備の運転，操業状態を維持できる利
点がある。Therefore, the deteriorated state of each thermocouple 1-1 to 1-n can be detected at an early stage, and only normal temperature measurement data can always be used unless a warning signal is output, which is highly reliable. It has the advantage of being able to maintain the operation and operation of the equipment.
【００２０】[0020]
【発明の効果】以上詳述したように、本発明の診断機能
付き多点温度監視装置によれば、電圧測定回路により、
各熱電対の電圧を測定しその測定結果に基づき各熱電対
１−１〜１−ｎの抵抗変化を測定しその抵抗変化分を温
度変換して出力して、比較回路により、温度測定回路に
よる温度測定値と電圧測定回路の温度変換値との差を各
熱電対毎に比較演算し、判定回路により、その温度差が
所定値よりも高くなった場合に該当熱電対が劣化したも
のと判定するように構成したので、各熱電対の劣化状態
を診断でき、正常な温度測定データが得られているか否
かの判断を可能となり、信頼性の高い設備の運転，操業
状態を維持できる効果がある。As described in detail above, according to the multipoint temperature monitoring device with a diagnostic function of the present invention, the voltage measuring circuit
The voltage of each thermocouple is measured, and the resistance change of each thermocouple 1-1 to 1-n is measured based on the measurement result, and the resistance change is temperature converted and output. The difference between the temperature measurement value and the temperature conversion value of the voltage measurement circuit is compared and calculated for each thermocouple, and the judgment circuit judges that the thermocouple has deteriorated when the temperature difference exceeds a predetermined value. Since it is configured so that it is possible to diagnose the deterioration state of each thermocouple, it is possible to judge whether or not normal temperature measurement data is obtained, and it is possible to maintain the reliable operation and operation of the equipment. is there.
【図１】本発明の一実施例としての診断機能付き多点温
度監視装置の構成を示す図である。FIG. 1 is a diagram showing a configuration of a multipoint temperature monitoring device with a diagnostic function as one embodiment of the present invention.
【図２】従来の多点温度監視装置の構成を示す図であ
る。FIG. 2 is a diagram showing a configuration of a conventional multipoint temperature monitoring device.
１−１〜１−ｎ 熱電対 ２Ａ 多点温度監視装置 ３−１〜３−ｎ 切替リレー ４ 温度測定回路 ５−１〜５−ｎ，６−１〜６−ｎ 端子 ７−１〜７−ｎ 切替リレー ８ 電圧測定回路 ９ 比較回路 １０ 判定回路 1-1 to 1-n thermocouple 2A multipoint temperature monitoring device 3-1 to 3-n switching relay 4 temperature measuring circuit 5-1 to 5-n, 6-1 to 6-n terminal 7-1 to 7- n Switching relay 8 Voltage measurement circuit 9 Comparison circuit 10 Judgment circuit
Claims (1)
け、各熱電対からの信号に基づいて前記の各被測温箇所
の温度を測定する温度測定回路をそなえてなる多点温度
監視装置において、 前記の各熱電対の電圧を測定することにより前記の各熱
電対の抵抗変化を測定しその抵抗変化分を温度変換して
出力する電圧測定回路と、 前記温度測定回路による温度測定値と前記電圧測定回路
の温度変換値との差を前記の各熱電対毎に比較演算する
ための比較回路と、 前記比較回路からの温度差が所定値よりも高くなった場
合に該当熱電対が劣化したものと判定する判定回路とが
そなえられたことを特徴とする診断機能付き多点温度監
視装置。1. A multipoint temperature monitor comprising a thermocouple provided at each of a number of temperature-measured points, and a temperature measuring circuit for measuring the temperature at each temperature-measured point based on a signal from each thermocouple. In the device, a voltage measurement circuit for measuring the resistance change of each thermocouple by measuring the voltage of each thermocouple and outputting the temperature change of the resistance change, and a temperature measurement value by the temperature measurement circuit. And a comparison circuit for comparing and calculating the difference between the temperature conversion value of the voltage measurement circuit for each of the thermocouples, the corresponding thermocouple when the temperature difference from the comparison circuit is higher than a predetermined value. A multi-point temperature monitoring device with a diagnostic function, which is provided with a determination circuit for determining deterioration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4290318A JPH06137956A (en) | 1992-10-28 | 1992-10-28 | Multi-point temperature monitor having diagnosis function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4290318A JPH06137956A (en) | 1992-10-28 | 1992-10-28 | Multi-point temperature monitor having diagnosis function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06137956A true JPH06137956A (en) | 1994-05-20 |
Family
ID=17754543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4290318A Pending JPH06137956A (en) | 1992-10-28 | 1992-10-28 | Multi-point temperature monitor having diagnosis function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06137956A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6777961B2 (en) | 2001-05-18 | 2004-08-17 | Denso Corporation | Thermopile infrared sensor and method for inspecting the same |
| CN102322970A (en) * | 2011-06-10 | 2012-01-18 | 武汉钢铁(集团)公司 | Automatic detection and analysis system for temperatures at multiple points of coke oven baking |
| CN106352998A (en) * | 2016-08-29 | 2017-01-25 | 北京四方创能光电科技有限公司 | Vacuum temperature field measurement device and measurement method |
| CN110109493A (en) * | 2019-05-06 | 2019-08-09 | 四川和泰光纤有限公司 | A kind of optical fiber production automatic temperature control system and control method |
-
1992
- 1992-10-28 JP JP4290318A patent/JPH06137956A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6777961B2 (en) | 2001-05-18 | 2004-08-17 | Denso Corporation | Thermopile infrared sensor and method for inspecting the same |
| CN102322970A (en) * | 2011-06-10 | 2012-01-18 | 武汉钢铁(集团)公司 | Automatic detection and analysis system for temperatures at multiple points of coke oven baking |
| CN106352998A (en) * | 2016-08-29 | 2017-01-25 | 北京四方创能光电科技有限公司 | Vacuum temperature field measurement device and measurement method |
| CN106352998B (en) * | 2016-08-29 | 2019-07-23 | 北京四方创能光电科技有限公司 | A kind of vacuum temperature field measurement device and measurement method |
| CN110109493A (en) * | 2019-05-06 | 2019-08-09 | 四川和泰光纤有限公司 | A kind of optical fiber production automatic temperature control system and control method |
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