JPH02190722A - Abnormality detector for temperature measuring equipment - Google Patents
Abnormality detector for temperature measuring equipmentInfo
- Publication number
- JPH02190722A JPH02190722A JP1011091A JP1109189A JPH02190722A JP H02190722 A JPH02190722 A JP H02190722A JP 1011091 A JP1011091 A JP 1011091A JP 1109189 A JP1109189 A JP 1109189A JP H02190722 A JPH02190722 A JP H02190722A
- Authority
- JP
- Japan
- Prior art keywords
- detected
- temperature measuring
- detection device
- output
- abnormality
- 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
- 230000005856 abnormality Effects 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
放射温度計や熱電対による温度測定あるいは温度制御な
どにおいて、例えば放射温度計の焦点ずれや視野欠け、
熱電対の位置ずれ等が発生すると計測に誤差が生じ、ま
た熱電対に断線が起きると機器の機能が停止してしまう
ことになる。[Detailed Description of the Invention] [Industrial Application Field] In temperature measurement or temperature control using a radiation thermometer or thermocouple, for example, the radiation thermometer may be affected by defocusing, lack of field of view, etc.
If a thermocouple is misaligned, an error will occur in measurement, and if a thermocouple is disconnected, the device will stop functioning.
従来、これら温度測定機器における各種の異常事態を検
出する方式として、機器の出力がある設定基準値を越え
た場合もしくは設定基準値より低くなった場合に警報を
発するという出力の絶対値によって異常を判定する機構
のものが知られている。Conventionally, as a method for detecting various abnormal situations in these temperature measuring devices, abnormalities are detected by the absolute value of the output, which issues an alarm when the output of the device exceeds a certain set standard value or becomes lower than the set standard value. Mechanisms for determining this are known.
しかし、この方式は、異常発生時の出力が設定基準値に
達するほど大きく変動した際にはじめて検出できるもの
であり、異常発生後の出力変動が小さいうちに異常とし
て検出することができないという難点がある０例えば、
１０００℃の温度に昇温制御している場合、設定基準値
としては１０００°ｃしかとれないため、６００℃に昇
温されたときに放射温度計の焦点がずれて５００℃を指
示したとしても、異常として検出することができない。However, this method can only detect an abnormality when the output fluctuates significantly enough to reach the set reference value, and has the disadvantage that it cannot be detected as an abnormality while the output fluctuation after an abnormality is small. For example,
If the temperature is controlled to rise to 1000°C, the set reference value can only be 1000°c, so even if the radiation thermometer is out of focus when the temperature is raised to 600°C and indicates 500°C. , cannot be detected as an abnormality.
本発明の目的は、前記従来の問題点を解消し、温度測定
機器に異常が生じた際、出力変動が未だ小さいうちに検
出できる機構をもつ温度測定機器の異常検出装置を提供
することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide an abnormality detection device for a temperature measuring device that has a mechanism that can detect an abnormality in the temperature measuring device while the output fluctuation is still small. .
上記の目的を達成するための本発明による温度測定機器
の異常検出装置は、温度測定機器からの出力を一定時間
毎に検出する検出装置と、該検出装置により検出された
値を前記一定時間記憶する記憶装置と、該記憶装置によ
り記憶された前記−定時間前の検出値と前記検出装置に
より検出された現在の検出値との比を計算する演算装置
と、核化と設定された基準値との偏差を求め該偏差が所
定値を越えた場合に出力信号を発する比較増幅装置とを
含むことを構成的特徴とするものである。To achieve the above object, an abnormality detection device for a temperature measuring device according to the present invention includes a detecting device that detects the output from the temperature measuring device at fixed time intervals, and a value that is stored for the fixed time period detected by the detecting device. a storage device that calculates the ratio of the detected value stored by the storage device a certain time ago to the current detected value detected by the detection device, and a reference value set as nucleation. The device is characterized in that it includes a comparison amplification device that calculates a deviation from a predetermined value and generates an output signal when the deviation exceeds a predetermined value.
本発明の装置には、さらに温度測定機器からの出力を検
出する時間間隔を設定するためのパルス発振装置を組み
込んでおくことが望ましい。It is desirable that the device of the present invention further incorporates a pulse oscillation device for setting the time interval for detecting the output from the temperature measuring device.
本発明によれば、温度測定機器からの出力を、検出装置
により一定時間（八Ｔ）毎に検出し、この検出値（Ｌ、
Ｘｉ、Ｘｌ、・）＋７）比（ＸＸ／Ｘ＋、ｘｉ／×２、
・・・）を演算装置により計算し、この比の値と基準値
との偏差が所定値を越えた場合に異常信号を発するよう
になっているから、小さな出力変動しか伴わない異常で
も逃さずに検出することができる。According to the present invention, the output from the temperature measuring device is detected every fixed time (8T) by the detection device, and the detected value (L,
Xi, Xl, ・)+7) Ratio (XX/X+, xi/×2,
) is calculated by a calculation device, and an abnormality signal is generated when the deviation between this ratio value and the reference value exceeds a predetermined value, so even abnormalities that involve only small output fluctuations are not missed. can be detected.
以下、図面により本発明の詳細な説明する。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図は本発明の異常検出装置の基本構成を示すブロッ
ク図、第２図は同じ（回路構成である。FIG. 1 is a block diagram showing the basic configuration of the abnormality detection device of the present invention, and FIG. 2 is the same (circuit configuration).
これらの図において、データ検出／データ記憶回路５は
検出装置ｌおよび記憶装置２に相当するもので、温度測
定機器からの出力信号をパルス発振回路６で発生するパ
ルスにより定まる時間（八Ｔ）毎に入力信号Ｘ、として
捕らえ、△Ｔ時間すなわち次の入力信号を検出するまで
の時間記憶保持する。保持された信号Ｘ、は、へＴ時間
後には新たな入力信号Ｘ！と入れ替えられる。In these figures, the data detection/data storage circuit 5 corresponds to the detection device 1 and the storage device 2, and outputs the output signal from the temperature measurement device every time (8T) determined by the pulses generated by the pulse oscillation circuit 6. is captured as the input signal X, and stored and held for ΔT time, that is, the time until the next input signal is detected. The held signal, X, becomes the new input signal, X!, after T time. can be replaced with
ΔＴ待時間前入力信号Ｘ＋と温度測定機器の現在の出力
として検出された入力信号Ｘ、を演算装置３に相当する
除算回路７へ入力し、これらの入力信号の比Ｚ（Ｘ！／
ＸＩ）を演算し出力する。The input signal X+ before the ΔT waiting time and the input signal X detected as the current output of the temperature measuring device are input to the division circuit 7 corresponding to the arithmetic unit 3, and the ratio of these input signals Z(X!/
XI) is calculated and output.
除算回路７の出力信号は、絶対値アンプ８、コンパレー
タ９およびフリップ・フロップｌＯから構成される比較
増幅装置４八入力される。除算回路７の出力信号を受け
た絶対値アンプ８は該出力信号の絶対値をとり、コンパ
レータ９は入力された前記Ｚ比と異常状態を想定して設
定された基準値との比較をおこない、基準値との偏差が
所定値を越えた場合に出力信号を発する。この出力信号
を受けたフリップ・フロップ１０は異常に対応する検出
信号を出力する。The output signal of the divider circuit 7 is input to a comparison amplifier 48, which is composed of an absolute value amplifier 8, a comparator 9, and a flip-flop IO. The absolute value amplifier 8 which receives the output signal of the division circuit 7 takes the absolute value of the output signal, and the comparator 9 compares the inputted Z ratio with a reference value set assuming an abnormal state, An output signal is generated when the deviation from the reference value exceeds a predetermined value. The flip-flop 10 receiving this output signal outputs a detection signal corresponding to the abnormality.
第３図は、本発明による異常検出装置の具体的な回路を
示したものである。FIG. 3 shows a specific circuit of the abnormality detection device according to the present invention.
ＩＣは集積回路であり、ＩＣ中に記載されている番号は
ＩＣの足の番号を示す。An IC is an integrated circuit, and the numbers written on the IC indicate the leg numbers of the IC.
ＩＣ２としてはＢｕｒｒ Ｂｒｏｗｎ社製ＳＨＣ２９８
ＡＭ、ＩＣ３としてはアナログ・デバイセズ社製ＡＤ５
３５ＪＤ 。IC2 is SHC298 manufactured by Burr Brown.
AM, IC3 is AD5 manufactured by Analog Devices.
35JD.
ＩＣｌ０としては東芝■製［単安定マルチバイブレーク
ＴＣ７４１１Ｃ１２３Ｊ 、そしてＩＣＩＩとしては東
芝■製［バイナリ−・カウンタＴＣ７４ＨＣ４０２０Ｊ
を使用した。その他のＩＣは特殊なものではなく、通常
の集積回路である。なお、本回路においては、異常を検
出した場合ブザーが鳴るように構成されている。ICl0 is Toshiba's monostable multi-vibrake TC7411C123J, and ICII is Toshiba's binary counter TC74HC4020J.
It was used. The other ICs are not special and are ordinary integrated circuits. Note that this circuit is configured so that a buzzer sounds when an abnormality is detected.
本回路を使用し、室温雰囲気中に置いた放射温度計で３
００°Ｃの物体を測定している際、放射温度計の焦点を
ずらしたところ、即座にブザーが鳴った。また、これを
熱電対による炉内温度制御に適用し、昇温中に熱電対を
断線させたところ、ブザー音の発生が確認された。Using this circuit, a radiation thermometer placed in a room temperature atmosphere
While measuring an object at 00°C, when I shifted the focus of the radiation thermometer, the buzzer immediately sounded. Furthermore, when this was applied to temperature control inside the furnace using a thermocouple and the thermocouple was disconnected during temperature rise, a buzzer sound was confirmed.
本発明によれば、一定時間（ΔＴ）毎の出力変動の割合
、（Ｘ、／Ｘ、、Ｘ３／ＸＩ、・・・）で異常の発生を
捕捉するから、微小な出力変動の異常でも適確に検出す
ることができ、あらゆる異常現象を初期段階で捕らえる
ことが可能となる。とくに、ゆるやかな昇温制御におけ
る異常検出に有効である。According to the present invention, since the occurrence of an abnormality is detected based on the ratio of output fluctuation per fixed time (ΔT), (X, /X,, X3/XI,...), even a small abnormality of output fluctuation can be detected. Accurate detection makes it possible to catch all abnormal phenomena at an early stage. It is particularly effective in detecting abnormalities in gradual temperature increase control.
また、出力の比を演算し、この比を設定された基準値と
比較するため、出力の絶対値が変動しても比較すべき基
準値を変える必要がない。Further, since the ratio of outputs is calculated and this ratio is compared with a set reference value, there is no need to change the reference value to be compared even if the absolute value of the output changes.
第１図１よ本発明の異常検出装置の基本構成を示したブ
ロック図、第２図は同回路構成を示したブロック図であ
る。第３図は本発明に係る異常検出装置の回路図である
。
ｌ・・・検出装置、 ２・・・記憶装置、３・・・
演算装置、 ４・・・比較増幅装置、５・・・デー
タ検出／データ記憶回路、６・・・パルス発振回路、７
・・・除算回路、８・・・絶対値アンプ、 ９・・・
コンパレータ、ｌＯ・・・フリップ・フロップ
特許出願人 東海カーボン株式会社FIG. 1 is a block diagram showing the basic configuration of the abnormality detection device of the present invention, and FIG. 2 is a block diagram showing the circuit configuration. FIG. 3 is a circuit diagram of an abnormality detection device according to the present invention. l...detection device, 2...storage device, 3...
Arithmetic device, 4... Comparison amplifier device, 5... Data detection/data storage circuit, 6... Pulse oscillation circuit, 7
...Division circuit, 8...Absolute value amplifier, 9...
Comparator, lO...Flip-flop patent applicant Tokai Carbon Co., Ltd.
Claims (1)
出装置（１）と、該検出装置により検出された値を前記
一定時間記憶する記憶装置（２）と、該記憶装置により
記憶された前記一定時間前の検出値と前記検出装置によ
り検出された現在の検出値との比を計算する演算装置（
３）と、該比と設定された基準値との偏差を求め該偏差
が所定値を越えた場合に出力信号を発する比較増幅装置
（４）とを含む温度測定機器の異常検出装置。 ２、温度測定機器からの出力を掲出する時間を設定する
パルス発振装置を組み込んだ請求項１記載の温度測定機
器の異常検出装置。[Claims] 1. A detection device (1) that detects the output from a temperature measuring device at fixed time intervals, a storage device (2) that stores the value detected by the detection device for the fixed time period, and an arithmetic device (
3); and a comparison amplifier (4) that determines the deviation between the ratio and a set reference value and issues an output signal when the deviation exceeds a predetermined value. 2. The abnormality detection device for a temperature measuring device according to claim 1, which incorporates a pulse oscillation device for setting a time for displaying the output from the temperature measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1011091A JPH02190722A (en) | 1989-01-20 | 1989-01-20 | Abnormality detector for temperature measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1011091A JPH02190722A (en) | 1989-01-20 | 1989-01-20 | Abnormality detector for temperature measuring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02190722A true JPH02190722A (en) | 1990-07-26 |
Family
ID=11768319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1011091A Pending JPH02190722A (en) | 1989-01-20 | 1989-01-20 | Abnormality detector for temperature measuring equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02190722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001343290A (en) * | 2000-06-05 | 2001-12-14 | Ulvac Japan Ltd | Vacuum heating device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS645727A (en) * | 1987-06-29 | 1989-01-10 | Mitsubishi Electric Corp | Electric discharge processing machine |
-
1989
- 1989-01-20 JP JP1011091A patent/JPH02190722A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS645727A (en) * | 1987-06-29 | 1989-01-10 | Mitsubishi Electric Corp | Electric discharge processing machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001343290A (en) * | 2000-06-05 | 2001-12-14 | Ulvac Japan Ltd | Vacuum heating device |
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