JPH07128098A - Remote diagnostic system for instrumentation facility - Google Patents

Remote diagnostic system for instrumentation facility

Info

Publication number
JPH07128098A
JPH07128098A JP5274702A JP27470293A JPH07128098A JP H07128098 A JPH07128098 A JP H07128098A JP 5274702 A JP5274702 A JP 5274702A JP 27470293 A JP27470293 A JP 27470293A JP H07128098 A JPH07128098 A JP H07128098A
Authority
JP
Japan
Prior art keywords
abnormality
signal
instrumentation
computor
abnormal
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
Application number
JP5274702A
Other languages
Japanese (ja)
Inventor
Nobuhiro Shindo
信博 進藤
Tetsuya Ueno
哲弥 上野
Kihachiro Suzuki
喜八郎 鈴木
Tsutomu Higashiya
勉 東谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nittetsu Hokkaido Control Systems Co Ltd
Original Assignee
Nittetsu Hokkaido Control Systems Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nittetsu Hokkaido Control Systems Co Ltd filed Critical Nittetsu Hokkaido Control Systems Co Ltd
Priority to JP5274702A priority Critical patent/JPH07128098A/en
Publication of JPH07128098A publication Critical patent/JPH07128098A/en
Pending legal-status Critical Current

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  • Arrangements For Transmission Of Measured Signals (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Debugging And Monitoring (AREA)
  • Computer And Data Communications (AREA)

Abstract

PURPOSE:To enhance efficiency in the instrumentation maintenance work by constituting a remote diagnostic system of a local computor for comparing an instrumentation signal from the instrumentation facility in a factory with a normal operation pattern to make a decision of abnormality and delivering an abnormality signal, and a central computor for receiving and analyzing the abnormality signal. CONSTITUTION:A normal operation pattern of instrumentation signal is preset in a local computor 5. A signal 1 from an instrumentation facility is fed through an isolator 2, an A/D converter 3, and an input terminal 4 to the computor 5 where the data is processed, stored, and edited before being displayed. An abnormal signal from the instrumentation facility is compared with the normal operation pattern at the computor 5 where an abnormal state is determined based on the variation rate, response speed, etc. A signal to this effect is then delivered through a modem 7, a telephone line 8, a selector 9, and a modem 10 to a central computor 12, where the data is analyzed, an abnormal state is determined, and a countermeasure is taken.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本考案は、工場内各プラントに設
置され、該プラントの各設備・機器類に附属する計装設
備の遠隔診断システムに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote diagnostic system for instrumentation equipment installed in each plant in a factory and attached to each equipment / device of the plant.

【0002】[0002]

【従来の技術】工場等においては、プラントの各設備・
機器類が正常に作動しているか否かを診断することが、
作業を正常に行う上で重要とされている。従来この診断
は、専門の検査員が、直接現場に赴き、各設備・機器類
の作動状態について、巡回点検診断したり、運転員から
状況を聴取し、さらに外観、動きの状態、計器の指示等
を視認して、経験的に判断する等の方法で行われてい
た。しかしながら、このような方法は、運転員の情報
に不確定さがある(特にデータ相互の時間関係)。既
設の記録計は殆どの場合測定信号(PV値)しか入力さ
れていないためデータ不足である。異常が発生してか
らモニター記録計を設置し、異常に関係する各点の信号
を記録するが、異常状態が再現しないことがある。記
録計相互の時間合わせ、ペン軸のズレ、チャートスピー
ドの違い等による時間差で異常解析ができない。等々の
問題点がある。
2. Description of the Related Art In a factory or the like, each equipment of a plant
Diagnosing whether the equipment is operating normally,
It is important for normal work. Conventionally, this diagnosis is carried out by a specialist inspector directly going to the site to make a patrol inspection diagnosis of the operating state of each facility and equipment, and to hear the situation from the operator, and also to inspect the appearance, movement state, instrument instructions. It was conducted by a method of visually observing the above and making an empirical decision. However, such a method has uncertainties in operator information (especially the time relationship between data). In most cases, the existing recorder has insufficient data because only the measurement signal (PV value) is input. After the abnormality occurs, a monitor recorder is installed to record the signal at each point related to the abnormality, but the abnormal state may not be reproduced. Anomaly analysis cannot be performed due to time differences due to time alignment between recorders, pen axis misalignment, chart speed differences, etc. There are problems such as.

【0003】さらに、最近のように効率化・省力化が要
望されている時代においては、一々専門の検査員が、現
場に赴き、その経験に基いて各設備・機器類の作動状態
から異常状態を判断することは効率的ではなく、各設備
・機器類の作動状態のデータを中央計器室に集め、通常
は検査員は中央計器室に勤務して該データを監視するよ
うにすれば、他の作業にも従事することができ、異常状
態の発生時のみ、現場に赴いて、対応することが可能と
なり、省力化は勿論、人員の配置の効率化をはかること
ができる。
Further, in the era where there is a demand for efficiency and labor saving as in recent years, a specialist inspector goes to the site one by one, and based on that experience, from the operating state of each facility / equipment to an abnormal state. It is not efficient to judge the situation, and if the operating condition data of each facility / equipment is collected in the central instrument room, and the inspector usually works in the central instrument room to monitor the data, It is possible to go to the site and respond only when an abnormal condition occurs, which not only saves labor but also improves the efficiency of staffing.

【0004】ところが、従来はこのような要望に対応す
る適当な手段がなかった。例えば、ボイラードラムレベ
ル制御機構の計装設備の診断について説明すると従来、
下記の各項目について行われていた。 (1)蒸気流量計の異常(電源断、配線異常、計測器異
常、計測器ゼロ・スパンドリフト、導圧管詰まり・漏れ
等の診断)。 (2)給水流量計の異常(電源断、配線異常、計測器異
常、計測器ゼロ・スパンドリフト、導圧管詰まり・漏れ
等の診断)。 (3)ドラムレベルの異常(電源断、配線異常、計測器
異常、計測器ゼロ・スパンドリフト、導圧管詰まり・漏
れ等の診断)。 (4)ドラムレベル制御異常(オフセット大、制御ゲイ
ン大、制御ゲイン小、調節弁動作不良等の診断)。 そして、(1)蒸気流量計の異常については、指示値が
定常範囲(0〜100%)内にあるか。各燃料より入熱
量を計算し蒸気流量と比較し判断する。 (2)給水流量計の異常については、指示値が定常範囲
(0〜100%)内にあるか。蒸気流量指示と給水流量
指示との比較により判断する。 (3)ドラムレベルの異常については、指示値が定常範
囲(0〜100%)内にあるか。レベル計指示と実レベ
ル(テレビ水面計)との比較により判断する。 (4)ドラムレベル制御異常については、調節計設定値
とレベル計指示との差により判断する。レベル計指示の
ハンチングの度合いより判断する。レベル計指示の制御
遅れの度合いより判断することが行われていた。
However, conventionally, there has been no suitable means to meet such a demand. For example, to explain the diagnosis of instrumentation equipment of the boiler drum level control mechanism,
It was done about each of the following items. (1) Abnormality of steam flowmeter (diagnosis of power failure, wiring abnormality, measuring instrument abnormality, measuring instrument zero / span drift, pressure pipe clogging / leakage, etc.). (2) Abnormality of feed water flow meter (diagnosis of power cut, wiring abnormality, measuring instrument abnormality, measuring instrument zero / span drift, pressure pipe clogging / leakage, etc.). (3) Drum level abnormality (power cut, wiring abnormality, measuring instrument abnormality, measuring instrument zero / span drift, pressure pipe clogging / leakage, etc.). (4) Abnormal drum level control (diagnosis of large offset, large control gain, small control gain, defective control valve operation, etc.). And (1) Regarding the abnormality of the steam flow meter, is the indicated value within the steady range (0 to 100%)? Determine the heat input from each fuel and compare it with the steam flow rate. (2) Regarding the abnormality of the feedwater flow meter, is the indicated value within the steady range (0 to 100%)? Judge by comparing the steam flow rate instruction and the feed water flow rate instruction. (3) Regarding the abnormal drum level, is the indicated value within the steady range (0 to 100%)? Judge by comparing the level indicator and the actual level (TV water gauge). (4) The abnormality of the drum level control is judged by the difference between the controller set value and the level meter instruction. Judgment is made based on the degree of hunting indicated by the level meter. Judgment was performed based on the degree of control delay of the level meter instruction.

【0005】しかしながら、従来の異常判定処理システ
ムは、測定信号の「上・下限異常」と調節計の設定値と
測定信号の差「偏差異常」を判定するだけのものであ
る。
However, the conventional abnormality determination processing system only determines the "upper / lower limit abnormality" of the measurement signal and the difference "deviation abnormality" between the set value of the controller and the measurement signal.

【0006】従って、上記のボイラードラムレベル制御
機構の計装設備の診断においても、可能な項目は(1)
蒸気流量計の異常、(2)給水流量計の異常、(3)ド
ラムレベルの異常とも、電源断、配線異常、計測器異常
の各項目のみ、また(4)ドラムレベル制御異常につい
ては、オフセット大の項目を診断できるに過ぎなかっ
た。しかも(1)〜(3)については、設備停止と計装
設備異常との判断がつかない。しかも、これらの診断は
運転員のヒヤリング、現在の指示値、又は記録計の記録
により必要によるトレースを実施するものである。従っ
て、確実な設備診断とは言えなかった。他の事例につい
ても、同様な問題があった。
Therefore, in the diagnosis of the instrumentation equipment of the boiler drum level control mechanism, the possible items are (1).
For steam flow meter abnormality, (2) feed water flow meter abnormality, (3) drum level abnormality, power off, wiring abnormality, measuring instrument abnormality only, and (4) drum level control abnormality, offset I could only diagnose a large number of items. Moreover, regarding (1) to (3), it cannot be determined that the equipment is stopped and the equipment is abnormal. In addition, these diagnoses are performed by the operator's hearing, the current reading, or the trace of the recorder to perform tracing if necessary. Therefore, it cannot be said that the equipment diagnosis is reliable. Similar problems were encountered in other cases.

【0007】[0007]

【発明が解決しようとする課題】本発明は、上記のよう
な問題点の解決するものであって、計装整備作業の効率
化を図るために、各プロセスの計測・制御状態を常時遠
隔監視する計装設備遠隔診断システムを提供することを
目的とする。
SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and in order to improve the efficiency of instrumentation maintenance work, the measurement / control state of each process is constantly monitored remotely. The purpose of the present invention is to provide a remote diagnostic system for instrumentation equipment.

【0008】[0008]

【課題を解決するための手段】すなわち、本発明は、工
場内に設置され、該工場の各設備・機器類に附属する計
装設備から発信される多数の計測信号を取り込み、これ
らの計装信号の正常作動パターンと比較して、変化率、
応答速度、その他の関連データから異常状態を判定し、
異常信号を発信するローカル計算機と、中央計器室に設
置され、該ローカル計算機と電話線により連結され、ロ
ーカル計算機からの異常信号を受信・解析し、かつロー
カル計算機に蓄積されたデータを取り込む機能を有する
中央計算機とからなることを特徴とする計装設備遠隔診
断システムを要旨とするものである。
[Means for Solving the Problems] That is, the present invention takes in a large number of measurement signals transmitted from instrumentation equipment installed in a factory and attached to each facility / equipment of the factory, The rate of change compared to the normal operating pattern of the signal,
Determine the abnormal state from the response speed and other related data,
It is installed in the central instrument room with a local computer that transmits an abnormal signal, and is connected to the local computer by a telephone line. It has a function to receive and analyze the abnormal signal from the local computer and to capture the data accumulated in the local computer. The gist of the invention is a remote diagnosis system for instrumentation equipment, which is characterized by comprising a central computer.

【0009】以下、本発明を詳細に説明する。図1は本
発明の構成を示す説明図、図2は、本発明を発電用ボイ
ラーのボイラードラムレベル制御機構の計装設備の診断
に適用した場合の実例を示す説明図、図3および図4は
異常状態の判断原理を示す図、図5はグラフの拡大およ
び移動状態を示す図である。
The present invention will be described in detail below. FIG. 1 is an explanatory view showing a configuration of the present invention, FIG. 2 is an explanatory view showing an actual example when the present invention is applied to a diagnosis of instrumentation equipment of a boiler drum level control mechanism of a power generation boiler, FIG. 3 and FIG. FIG. 5 is a diagram showing the principle of determining an abnormal state, and FIG. 5 is a diagram showing an enlarged and moved state of the graph.

【0010】図1において、1は工場に設けられた各設
備・機器類に附属する計装設備から発信される多数(例
えば40点)の計測信号で、アイソレータ2、A/D変
換器3、入力端子4を介してローカル計算機5に入力
し、処理され、蓄積される。6はローカル計算機5の出
力端子,7はモデムである。8は該ローカル計算機5と
中央計器室に設置された中央計算機12とを連絡する専
用電話回線、9は該専用電話回線の端末に設けたセレク
タ、10はモデム、11は中央計算機12の入力端子で
ある。
In FIG. 1, reference numeral 1 denotes a large number (for example, 40 points) of measurement signals transmitted from instrumentation equipment attached to each equipment / equipment provided in a factory, including an isolator 2, an A / D converter 3, It is input to the local computer 5 via the input terminal 4, processed, and stored. Reference numeral 6 is an output terminal of the local computer 5, and 7 is a modem. 8 is a dedicated telephone line for connecting the local computer 5 and a central computer 12 installed in the central instrument room, 9 is a selector provided at the terminal of the dedicated telephone line, 10 is a modem, 11 is an input terminal of the central computer 12 Is.

【0011】図2において、13はボイラードラム、1
4はその給水配管、15はオリフィス、18は調節弁で
ある。また16はオリフィスに取り付けた流量を指示す
る発信器でその信号は調節計17に伝達され、前記調節
弁18を調節する。19はボイラードラム13の水位を
指示する発信器でレベル設定調節計20と接続してい
る。21はレベル設定調節計20の発信器、22は蒸気
配管、23は該配管に設置したオリフィスである。
In FIG. 2, 13 is a boiler drum and 1
4 is the water supply pipe, 15 is an orifice, and 18 is a control valve. Reference numeral 16 is a transmitter attached to the orifice for instructing the flow rate, the signal of which is transmitted to the controller 17 to adjust the control valve 18. Reference numeral 19 is a transmitter for indicating the water level of the boiler drum 13, which is connected to the level setting controller 20. Reference numeral 21 is a transmitter of the level setting controller 20, 22 is a steam pipe, and 23 is an orifice installed in the pipe.

【0012】[0012]

【作用】本発明は、このように構成されているので、先
ず、予め計装信号の正常作動パターンをローカル計算機
5に設定しておく。計装設備から発信される信号1はア
イソレータ2に取り込まれ、さらにA/D変換器3、入
力端子4を介してローカル計算機5に入力し、データ処
理され、例えば1時間分のデータが蓄積・編集され、同
時にリアルタイムのデータが画面表示される。
Since the present invention is constructed as described above, first, the normal operation pattern of the instrumentation signal is set in the local computer 5 in advance. The signal 1 transmitted from the instrumentation equipment is captured by the isolator 2 and further input to the local computer 5 via the A / D converter 3 and the input terminal 4 to be subjected to data processing, for example, data for one hour is accumulated. It is edited and at the same time real-time data is displayed on the screen.

【0013】計装設備から異常信号が発信されると、該
信号はローカル計算機5に入力し、予め設定されていた
正常作動パターンと比較される。すなわち、変化率、応
答速度、さらにはその他の関連データによって正常パタ
ーンの値と比較され、異常状態が判定される。異常状態
と判定されると、該ローカル計算機5から、異常状態を
示す信号が、端子6、モデム7、専用電話回線8、セレ
クタ9、モデム10、端子11を介して中央計器室に設
置された中央計算機12に伝達される。そこで該中央計
器室に勤務する検査員は、該データを解析し、また必要
に応じてローカル計算機5に蓄積されているデータを呼
び出し、これらのデータを解析して異常状態か否かを判
断し、異常と判断した場合は現場に赴き、所要の措置を
講ずる。
When an abnormal signal is transmitted from the instrumentation equipment, the abnormal signal is input to the local computer 5 and compared with a preset normal operation pattern. That is, the abnormal state is determined by comparing the value of the normal pattern with the change rate, the response speed, and other related data. When it is determined to be in an abnormal state, a signal indicating the abnormal state is installed from the local computer 5 in the central instrument room via the terminal 6, the modem 7, the dedicated telephone line 8, the selector 9, the modem 10 and the terminal 11. It is transmitted to the central computer 12. Therefore, the inspector working in the central instrument room analyzes the data, calls the data stored in the local computer 5 as necessary, and analyzes these data to determine whether or not there is an abnormal state. If it is judged to be abnormal, go to the site and take necessary measures.

【0014】[0014]

【実施例】図2は、本発明を発電用ボイラーのボイラー
ドラムレベル制御機構の計装設備の診断に適用した場合
の実例を示すものである。図2において、発信器16、
19、21等からの信号は、図1に示すローカル計算機
5に入力し、該計算機5において、従来の「上・下限異
常」「偏差異常」に加えて、「変化率異常」、「応答速
度異常」および必要に応じてその他の関連データを比較
して異常診断のためのデータ処理が行われる。
FIG. 2 shows an example in which the present invention is applied to a diagnosis of instrumentation equipment of a boiler drum level control mechanism of a power generation boiler. In FIG. 2, the oscillator 16,
Signals from 19, 21, etc. are input to the local computer 5 shown in FIG. 1, and in addition to the conventional "upper / lower limit abnormality" and "deviation abnormality", the "change rate abnormality", "response speed" Data processing for abnormality diagnosis is performed by comparing the "abnormality" and other related data as necessary.

【0015】変化率異常処理は計装信号の瞬時値データ
をローカル計算機5に取り込み、10秒毎にtanθを
計算して、その変化率を求め、その変化率が設定パラメ
ータを越えると異常と見做す(図3参照)。また応答速
度異常処理は計装信号の瞬時値データをローカル計算機
5に取り込み、応答速度の計算を行う。図4において、
P1をNo1信号の最大変化率の起点、P2をNo2信
号の最大変化率の起点、P0を最大変化率の応答するま
での時間、t1 をサンプリング周期、t2 をNo1信号
の高さT1まで到達する時間、t3 をt2 とt1 の差と
すると、変化率最大値の点を記憶、変化率最大値を
記憶し、No1信号の変化率最大値の点(時間)とNo
2信号の変化率最大値の点の差P0=P2−P1を求
め、その値が設定パラメータより大であれば異常と判定
する。また、No2信号の傾きθを求める(tanθ=
T2/t1 )。No2信号の傾きにおける高さT1に到
達するまでの時間t2 を求める(t2 =T1/tan
θ)。No1信号とNo2信号の高さT1に到達するま
での時間を求める(t3 =t2 −t1 )。このt3 の値
が設定パラメータより大であれば異常と判定する(図4
参照)。
In the change rate abnormality processing, the instantaneous value data of the instrumentation signal is taken into the local computer 5, tan θ is calculated every 10 seconds, the change rate is obtained, and when the change rate exceeds the set parameter, it is considered to be abnormal. (See Figure 3). In the response speed abnormality processing, the instantaneous value data of the instrumentation signal is taken into the local computer 5 and the response speed is calculated. In FIG.
Origin of the maximum rate of change of P1 to No1 signal, the starting point of the maximum rate of change of the P2 and No2 signals, time to response of maximum change rate P0, the t 1 sampling period, to a height T1 of t 2 to No1 signal Assuming that the arrival time, t 3 is the difference between t 2 and t 1 , the point of maximum change rate is stored, the maximum value of change rate is stored, and the point (time) of maximum change rate of No 1 signal and No
The difference P0 = P2-P1 between the points of the maximum change rate of the two signals is obtained, and if the value is larger than the set parameter, it is determined to be abnormal. Further, the slope θ of the No2 signal is calculated (tan θ =
T2 / t 1). The time t 2 required to reach the height T1 in the slope of the No2 signal is obtained (t 2 = T1 / tan
θ). Request No1 signal and the time to reach the height T1 of the No2 signals (t 3 = t 2 -t 1 ). If the value of t 3 is larger than the set parameter, it is determined to be abnormal (FIG. 4).
reference).

【0016】従って、上下限異常と変化率異常の2つの
データを組み合わせることにより、(1)蒸気流量計の
異常、(2)給水流量計の異常、(3)ドラムレベルの
異常の内、電源断、配線異常、計測器異常の各項目につ
いて異常診断を行うこともできる。例えば、蒸気流量の
配線異常のときは、流量指示値が0%以下で下限異常、
指示値の低下する早さで変化率異常が診断され、設備停
止と計装設備異常との区別ができる。また、(1)蒸気
流量計の異常、(2)給水流量計の異常の内、計測器ゼ
ロ・スパン、オフセット大の問題については、蒸気流量
を正として給水流量と比較することにより診断すること
もできる。さらに、(4)ドラムレベル制御異常の内、
制御ゲイン大の問題については、上下限異常と変化率異
常の2つのデータを組み合わせることにより、診断可能
である。すなわち、制御系はゲインが大きいときは発散
現象(ハンチング)を起こす。従ってその大きさ・繰り
返しを上下限異常で検出し、制御遅れによるレベル変動
との見分けを変化率異常で行い、同時刻にこの2点が検
出されるとき制御ゲイン大と判断する。また、(4)ド
ラムレベル制御異常の内、制御ゲイン小および調節弁不
良については、応答速度異常により診断することが可能
である。すなわち、制御ゲイン小(不足)の判断はドラ
ムレベル信号に対しての給水流量信号の追従の早さが基
準内に収まっているか否かで行うことができる。
Therefore, by combining the two data of the upper and lower limit abnormality and the change rate abnormality, (1) steam flow meter abnormality, (2) feed water flow meter abnormality, and (3) drum level abnormality It is also possible to perform abnormality diagnosis for each item of disconnection, wiring abnormality, and measuring instrument abnormality. For example, if the wiring of the steam flow rate is abnormal, the lower limit of the flow rate indication value is 0% or less
An abnormality in the rate of change is diagnosed at the rate at which the indicated value drops, and equipment stoppage and instrumentation equipment abnormality can be distinguished. Regarding (1) Steam flow meter abnormality and (2) Feed water flow meter abnormality, problems such as zero / span of measuring instrument and large offset should be diagnosed by comparing the steam flow rate with the feed water flow rate as positive. You can also Furthermore, among (4) abnormal drum level control,
The problem of large control gain can be diagnosed by combining the two data of upper and lower limit abnormality and change rate abnormality. That is, the control system causes a divergence phenomenon (hunting) when the gain is large. Therefore, the magnitude / repetition is detected by the upper and lower limit abnormalities, and the level fluctuation due to the control delay is distinguished by the change rate abnormality, and when these two points are detected at the same time, the control gain is judged to be large. Further, among (4) abnormal drum level control, small control gain and defective control valve can be diagnosed by abnormal response speed. That is, the control gain is small (insufficient) can be determined by whether or not the follow-up speed of the water supply flow rate signal with respect to the drum level signal is within the reference.

【0017】さらに、本発明においては、上記のような
作業により、異常と診断されたときには、そのデータが
異常発生時間の前後30分に亘り、異常項目とともに保
存される。また、異常診断グループの登録により、該グ
ループの1点が異常と診断されると、グループの全デー
タが異常発生時間の前後30分に亘り保存される。
Further, in the present invention, when an abnormality is diagnosed by the above work, the data is stored together with the abnormal item for 30 minutes before and after the abnormality occurrence time. Further, if one point of the group is diagnosed as abnormal by registering the abnormality diagnosis group, all data of the group is stored for 30 minutes before and after the abnormality occurrence time.

【0018】また、本発明においては、異常診断グルー
プの登録により、中央計算機において、異常関連データ
を、解析画面に同一グラフ表示することができ、さらに
は、該グラフ画面をX軸、Y軸とも拡大表示することが
できる(図5左側参照)。また、表示されたグラフデー
タの任意のデータを1点づつX軸、Y軸とも移動させる
ことができる(図5(b)参照)。従って、データ間の
時間に関する異常解析を容易に行うことができる。ま
た、本発明は、データの伝送に当たりビット数を8ビッ
トに圧縮することにより、伝送時間の短縮を図ってい
る。
Further, in the present invention, by registering an abnormality diagnosis group, abnormality-related data can be displayed in the same graph on the analysis screen in the central computer, and further, the graph screen can be displayed on both the X-axis and the Y-axis. It can be enlarged and displayed (see the left side of FIG. 5). Further, arbitrary data of the displayed graph data can be moved point by point on both the X axis and the Y axis (see FIG. 5B). Therefore, it is possible to easily perform the abnormality analysis regarding the time between data. In addition, the present invention shortens the transmission time by compressing the number of bits for data transmission to 8 bits.

【0019】[0019]

【発明の効果】以上説明したように、本発明は、計装設
備の異常診断を自動的かつ広範囲に亘って確実に、しか
も異常の兆候を早期に判断できるので、設備の安定操業
を期待することができる。また、検査員が中央計器室に
おいて遠隔診断することが可能であるので、検査・整備
要員の削減と省力化・効率化を図ることができる等々、
効率的な操業に資するところ極めて大である。
As described above, according to the present invention, the abnormality diagnosis of the instrumentation equipment can be automatically and reliably performed over a wide range, and the sign of the abnormality can be judged early, so that stable operation of the equipment is expected. be able to. Also, since the inspector can make a remote diagnosis in the central instrument room, it is possible to reduce the number of inspection / maintenance personnel and save labor / efficiency.
It is extremely large in contributing to efficient operation.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の構成を示す説明図。FIG. 1 is an explanatory diagram showing a configuration of the present invention.

【図2】本発明を発電用ボイラーのボイラードラムレベ
ル制御機構の計装設備の診断に適用した場合の実例を示
す説明図。
FIG. 2 is an explanatory diagram showing an actual example when the present invention is applied to diagnosis of instrumentation equipment of a boiler drum level control mechanism of a power generation boiler.

【図3】本発明における変化率異常処理の実例を示す
図。
FIG. 3 is a diagram showing an actual example of change rate abnormality processing in the present invention.

【図4】本発明における応答速度異常処理の実例を示す
図。
FIG. 4 is a diagram showing an example of response speed abnormality processing in the present invention.

【図5】(a),(b)は本発明における解析画面の拡
大および移動の態様を示す図。
5 (a) and 5 (b) are views showing a mode of enlargement and movement of an analysis screen in the present invention.

【符号の説明】[Explanation of symbols]

1 計測信号 2 アイソレータ 3 A/D変換器 4 入力端子 5 ローカル計算機 6 出力端子 7 モデム 8 専用電話回線 9 セレクタ 10 モデム 11 入力端子 12 中央計算機 13 ボイラードラム 14 給水配管 15 オリフィス 16 発信器 17 調節計 18 調節弁 19 発信器 20 レベル設定調節計 21 発信器 22 蒸気配管 23 オリフィス 1 Measurement Signal 2 Isolator 3 A / D Converter 4 Input Terminal 5 Local Computer 6 Output Terminal 7 Modem 8 Dedicated Telephone Line 9 Selector 10 Modem 11 Input Terminal 12 Central Computer 13 Boiler Drum 14 Water Supply Pipe 15 Orifice 16 Transmitter 17 Controller 18 Control Valve 19 Transmitter 20 Level Setting Controller 21 Transmitter 22 Steam Pipe 23 Orifice

───────────────────────────────────────────────────── フロントページの続き (72)発明者 東谷 勉 北海道室蘭市仲町12番地 ニッテツ北海道 制御システム株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsutomu Azumaya 12 Nakamachi, Muroran City, Hokkaido Nittetsu Hokkaido Control System Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 工場内に設置され、該工場の各設備・機
器類に附属する計装設備から発信される多数の計測信号
を取り込み、これらの計装信号の正常作動パターンと比
較して、変化率、応答速度、その他の関連データから異
常状態を判定し、異常信号を発信するローカル計算機
と、中央計器室に設置され、該ローカル計算機と電話線
により連結され、ローカル計算機からの異常信号を受信
・解析し、かつローカル計算機に蓄積されたデータを取
り込む機能を有する中央計算機とからなることを特徴と
する計装設備遠隔診断システム。
1. A large number of measurement signals transmitted from instrumentation equipment attached to each facility / equipment of the factory are taken in, and compared with normal operation patterns of these instrumentation signals, A local computer that determines an abnormal condition from rate of change, response speed, and other related data and transmits an abnormal signal is installed in the central instrument room, connected to the local computer by a telephone line, and outputs an abnormal signal from the local computer. A remote diagnostic system for instrumentation equipment, comprising: a central computer having a function of receiving / analyzing and capturing data accumulated in a local computer.
JP5274702A 1993-11-02 1993-11-02 Remote diagnostic system for instrumentation facility Pending JPH07128098A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5274702A JPH07128098A (en) 1993-11-02 1993-11-02 Remote diagnostic system for instrumentation facility

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5274702A JPH07128098A (en) 1993-11-02 1993-11-02 Remote diagnostic system for instrumentation facility

Publications (1)

Publication Number Publication Date
JPH07128098A true JPH07128098A (en) 1995-05-19

Family

ID=17545373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5274702A Pending JPH07128098A (en) 1993-11-02 1993-11-02 Remote diagnostic system for instrumentation facility

Country Status (1)

Country Link
JP (1) JPH07128098A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002109674A (en) * 2000-10-02 2002-04-12 Yamabun Denki:Kk Sheet thickness measuring and automatic controlling device, and inspection and diagnostic method thereof
US7062343B2 (en) 1996-07-31 2006-06-13 Canon Kabushiki Kaisha Remote maintenance system
JP2010171791A (en) * 2009-01-23 2010-08-05 Yokogawa Electric Corp Communication equipment
JP2016011954A (en) * 2014-06-26 2016-01-21 タタ コンサルタンシー サービシズ リミテッドTATA Consultancy Services Limited Detecting event from multiple time-series data sequences
JP6375458B1 (en) * 2018-01-23 2018-08-15 松田産業株式会社 Metal recovery system and metal recovery device
JP2019191940A (en) * 2018-04-25 2019-10-31 オムロン株式会社 Communication apparatus, control method of communication apparatus, external equipment, control method of external equipment, and control system
JP2020154734A (en) * 2019-03-20 2020-09-24 株式会社リコー Operation analysis device, operation analysis method, and operation analysis program
CN116839650A (en) * 2023-08-25 2023-10-03 南通龙海电子科技有限公司 Intelligent instrument verification system and method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7062343B2 (en) 1996-07-31 2006-06-13 Canon Kabushiki Kaisha Remote maintenance system
US7805279B2 (en) 1996-07-31 2010-09-28 Canon Kabushiki Kaisha Remote maintenance system
JP2002109674A (en) * 2000-10-02 2002-04-12 Yamabun Denki:Kk Sheet thickness measuring and automatic controlling device, and inspection and diagnostic method thereof
JP2010171791A (en) * 2009-01-23 2010-08-05 Yokogawa Electric Corp Communication equipment
JP2016011954A (en) * 2014-06-26 2016-01-21 タタ コンサルタンシー サービシズ リミテッドTATA Consultancy Services Limited Detecting event from multiple time-series data sequences
JP6375458B1 (en) * 2018-01-23 2018-08-15 松田産業株式会社 Metal recovery system and metal recovery device
JP2019127610A (en) * 2018-01-23 2019-08-01 松田産業株式会社 Metal recovery system and metal recovery device
JP2019191940A (en) * 2018-04-25 2019-10-31 オムロン株式会社 Communication apparatus, control method of communication apparatus, external equipment, control method of external equipment, and control system
JP2020154734A (en) * 2019-03-20 2020-09-24 株式会社リコー Operation analysis device, operation analysis method, and operation analysis program
CN116839650A (en) * 2023-08-25 2023-10-03 南通龙海电子科技有限公司 Intelligent instrument verification system and method
CN116839650B (en) * 2023-08-25 2023-12-22 南通龙海电子科技有限公司 Intelligent instrument verification system and method

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