JP2961832B2 - Oil leak detection method for OF cable line - Google Patents
Oil leak detection method for OF cable lineInfo
- Publication number
- JP2961832B2 JP2961832B2 JP21224390A JP21224390A JP2961832B2 JP 2961832 B2 JP2961832 B2 JP 2961832B2 JP 21224390 A JP21224390 A JP 21224390A JP 21224390 A JP21224390 A JP 21224390A JP 2961832 B2 JP2961832 B2 JP 2961832B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- amount
- section
- cable line
- detection method
- 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
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- Examining Or Testing Airtightness (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明はOFケーブル線路の漏油検出方法に関し、特
に給油区間が複数に分かれた線路における中小漏油を検
出する方法に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting oil leakage in an OF cable line, and more particularly to a method for detecting small and medium oil leakage in a line having a plurality of oiling sections.
OFケーブル線路の中小漏油を検出するため、従来か
ら、油そう油量を長期にわたり計測記録し、その記録の
変化を読み取って経験や勘により中小漏油の有無を判定
することが行われていた。To detect small and medium oil leaks in OF cable lines, it has been customary to measure and record the amount of oil in the oil tank over a long period of time, read changes in the record, and determine the presence or absence of small and medium oil leaks based on experience and intuition. Was.
しかし、このような判定方法は、漏油に基づく油量の
変化が負荷の変動や気温の変化による油量の変化に埋も
れてしまい、早期に中小漏油を検出することが困難であ
った。However, in such a determination method, a change in oil amount due to oil leakage is buried in a change in oil amount due to a change in load or a change in temperature, and it has been difficult to detect small and medium-sized oil leakage at an early stage.
給油区間が複数に区分されたOFケーブル線路において
は、当然のことながら、同一負荷電流がケーブルに流
れ、またケーブルの布設条件も大同小異であることか
ら、負荷変動や気温変化に追従して変動する各区間用油
そう油量相互間には強い相関関係があることが知られて
いる。Naturally, in an OF cable line with multiple refueling sections, the same load current flows through the cable, and the cable laying conditions also vary greatly, so that it fluctuates according to load fluctuations and temperature changes. It is known that there is a strong correlation between the amount of oil for each section.
そこで、この発明は上記の相関関係に着目して負荷変
動や気温変化に左右されることなく中小漏油を容易かつ
早期に検出する方法を提供することを技術的課題とす
る。Accordingly, it is a technical object of the present invention to provide a method for easily and early detecting small and medium-sized oil spills without being affected by a load change or a temperature change by focusing on the above correlation.
上記の課題を解決するために、この発明は給油区間が
複数に区分されたOFケーブル線路の漏油検出方法におい
て、二つの給油区間の油量の相関図に引いた回帰直線に
基づき、一方の実測油量をベースに他方の給油区間の近
似化油量を算出しその区間の実測油量と近似化油量の差
を経時的にチェックし、その差と管理限界との比較によ
り漏油の有無を判定するようにしたものである。In order to solve the above-mentioned problem, the present invention provides a method for detecting oil leakage in an OF cable line in which a refueling section is divided into a plurality of sections, based on a regression line drawn on a correlation diagram of oil amounts of two refueling sections, Based on the measured oil amount, calculate the approximated oil amount in the other lubrication section, check the difference between the measured oil amount and the approximated oil amount in that section over time, and compare the difference with the control limit to determine the amount of oil leakage. The presence or absence is determined.
以下、これを詳述する。 Hereinafter, this will be described in detail.
第1図はあるOFケーブル線路に属する二つの給油区間
(例えば、隣接する第I区間と第II区間)の正常な状態
における油量X、Yの実測値に基づく実測相関図であ
り、同図に引いた直線は一次回帰式であり、一般にY=
aX+bで表わされる。FIG. 1 is an actual measurement correlation diagram based on actual measurement values of oil amounts X and Y in a normal state of two refueling sections (for example, adjacent I section and II section) belonging to a certain OF cable line. Is a linear regression equation, and generally Y =
It is represented by aX + b.
次に、第I区間の実測油量yと、第II区間の実測油量
xを用い上記の一次回帰式から求めた近似油量y′=ax
+bとの差D=y−y′の経時的変化を示すと第2図の
ようになる。Next, the approximate oil amount y '= ax obtained from the above-described linear regression equation using the measured oil amount y in the I section and the measured oil amount x in the II section.
FIG. 2 shows the change with time of the difference D = y−y ′ from + b.
これらのデータ群から値の平均値と標準偏差σを求
める。管理限界の一例として、図では+2σと+3
σの間を「第II区間要注意」、+3σを超えると「第
II区間異常」と定め、同様に−2σと−3σの間を
「第I区間要注意」、−3σを超えると「第I区間異
常」と定め、それらの限界を超えた場合には中小漏油注
意報或いは警報を表示させる。From these data groups, the average value and the standard deviation σ are obtained. As an example of the control limit, in the figure, + 2σ and +3
between σ is “Part II Caution required”, and if + 3σ is exceeded,
In the same manner, the section between -2σ and -3σ is defined as “Needs attention”, and the section above -3σ is defined as “I section abnormal”. Display oil warning or alarm.
上記「異常」の状態を第1図に例示する。即ち、Y1−
y′>+3σの場合は、第II区間側に漏油を生じてい
ると判定する場合であり、Y2−y′<−3σの場合は
第I区間で漏油が生じていると判定する場合である。FIG. 1 shows an example of the above “abnormal” state. That is, Y 1 −
If y '> + 3σ, it is determined that oil leakage has occurred on the section II side, and if Y 2 −y ′ <− 3σ, it is determined that oil leakage has occurred on section I. Is the case.
第3図はシステムの構成例図であり、油そう部1、制
御所2、電力所3を含み、油そう部1は油そう4、端局
装置5、電話線切替装置6等を有する。油そう4は油量
センサー7を有し、そのセンサー7の出力が端局装置5
に入力される。端局装置5は入力された油量データを一
定期間分ストアーし、電話線切替装置6、電話線9、電
力所3、電話線切替装置10を経て親局11に一定時間間隔
でデータ送信される。親局11はこれらのデータに基づき
異常の有無を判定し、その結果を表示する。FIG. 3 is an example of the configuration of the system, including an oil tank 1, a control station 2, and a power station 3. The oil tank 1 has an oil tank 4, a terminal device 5, a telephone line switching device 6, and the like. The oil tank 4 has an oil amount sensor 7, and the output of the sensor 7 is a terminal device 5.
Is input to The terminal device 5 stores the input oil amount data for a certain period of time, and transmits the data to the master station 11 via the telephone line switching device 6, the telephone line 9, the power station 3, and the telephone line switching device 10 at regular time intervals. You. The master station 11 determines the presence or absence of an abnormality based on these data, and displays the result.
なお、端局5に中小漏油判定機能を持たせ、異常時に
警報を発信させ、常時有人の制御所2で受信表示させて
もよい。Note that the terminal station 5 may be provided with a small / medium oil leakage determination function, an alarm may be transmitted in the event of an abnormality, and the terminal station 5 may always receive and display the signal at the manned control center 2.
第4図は前記の端局装置5の内部構成例であり、油そ
う4の油量センサー7で検出された検出信号は、コント
ローラ12を経て端局装置5の電流/電圧変換器13、マル
チプレクタ14、A/D変換器15を経てバス16に取入れられ
る。ROM17はデータ入力、漏油の判定、通信等のプログ
ラムが収容される。RAM18には一日分或いは1時間ごと
等の一定時間内の油量データが蓄積される。CPU19は予
定のプログラムに基づき一連の処理を行う。FIG. 4 shows an example of the internal configuration of the terminal device 5. The detection signal detected by the oil level sensor 7 of the oil tank 4 is sent to the current / voltage converter 13 of the terminal device 5 via the controller 12 and the multiplexer. Lector 14 and A / D converter 15 are taken into bus 16. The ROM 17 stores programs for data input, oil leakage determination, communication, and the like. The RAM 18 stores oil amount data for a certain period of time, such as for one day or every hour. The CPU 19 performs a series of processes based on a scheduled program.
一方、PIOインターフェイス20を介して無電圧警報接
点変換装置21が接続され、この装置21を通じて漏油信号
を制御所2に送信する。また、SIOインターフェイス22
をを介して電話線切替装置6が接続され、この装置6を
通じて油量データを親局11へ送信する。On the other hand, a no-voltage alarm contact converter 21 is connected via a PIO interface 20, and an oil leak signal is transmitted to the control station 2 through this device 21. In addition, SIO interface 22
The telephone line switching device 6 is connected via the terminal 6 and transmits oil quantity data to the master station 11 through the device 6.
第5図は報局11又は端局装置5のCPU19による中小漏
油の判定の過程を示すフローチャートであり、以下のス
テップからなる。FIG. 5 is a flowchart showing a process of judging a medium or small oil leak by the CPU 19 of the reporting station 11 or the terminal device 5 and comprises the following steps.
ステップ:一定時間間隔で油量x及びyを取込む。 Step: Oil quantities x and y are taken in at regular time intervals.
ステップ:y′=ax+b、D=y−y′を演算する。 Step: Calculate y '= ax + b and D = y-y'.
ここに、a及びbは予め実測データに基づく相関図か
ら判明している。Here, a and b are known in advance from a correlation diagram based on actual measurement data.
ステップ:|D|が管理限界3σを超えたか否かを判断
する。Step: It is determined whether or not | D | has exceeded the control limit 3σ.
ステップ:ステップの判断が是(YES)の場合は
中小漏油警報を発生する。Step: If the judgment of step is YES (YES), a small / medium oil leakage alarm is generated.
なお、ステップの判断が否(NO)の場合はステップ
に戻る。If the determination of the step is negative (NO), the process returns to the step.
以上のように、この発明は区分された各給油区間の油
そう油量の変動が強い相関関係にあることを着目し、相
関表に引いた回帰直線と実測値のバラツキをチェックす
ることにより中小漏油を判定するようにしたものである
から、負荷変動や気温変化による油量の変動の影響を受
けることなく、早期かつ正確に中小漏油を検出すること
ができる。As described above, the present invention focuses on the fact that the fluctuations in the oil level in each of the divided refueling sections have a strong correlation, and checks the variation between the regression line drawn in the correlation table and the measured value to determine the small and medium size. Since the oil leakage is determined, small and medium-sized oil leakage can be detected quickly and accurately without being affected by fluctuations in the oil amount due to load fluctuations and temperature changes.
第1図は隣接給油区間の油量の計測記録に基づく相関
図、第2図は油量の実測値と近似油量の差による経時的
チェックの方法の説明図、第3図はシステム全体のブロ
ック図、第4図は端局装置の図、第5図は端局装置のフ
ローチャートである。 1……油そう部、2……制御所、 3……電力所、4……油そう、 5……端局装置、6……電話線切替装置、 7……油量センサー、8……警報監視盤、 9……電話線、10……電話線切替装置、 11……親局。FIG. 1 is a correlation diagram based on measurement records of oil amounts in adjacent refueling sections, FIG. 2 is an explanatory diagram of a time-dependent check method based on a difference between an actually measured oil amount and an approximate oil amount, and FIG. FIG. 4 is a block diagram of the terminal device, and FIG. 5 is a flowchart of the terminal device. 1 ... oil tank section 2 ... control station 3 ... power station 4 ... oil station 5 ... terminal equipment 6 ... telephone line switching device 7 ... oil level sensor 8 ... Alarm monitoring panel, 9: telephone line, 10: telephone line switching device, 11: master station.
Claims (1)
路の漏油検出方法において、二つの給油区間の油量の相
関図に引いた回帰直線に基づき、一方の実測油量をベー
スに他方の給油区間の近似化油量を算出し、その区間の
実測油量と近似化油量の差を経時的にチェックし、その
差と管理限界との比較により漏油の有無を判定すること
を特徴とするOFケーブル線路の漏油検出方法。1. A method for detecting oil leakage in an OF cable line in which a fueling section is divided into a plurality of sections, based on a regression line drawn on a correlation diagram of oil amounts in two fueling sections, based on one measured oil amount and the other based on a measured oil amount. Calculate the approximated amount of oil in the refueling section, check the difference between the measured oil amount and the approximated amount of oil in that section over time, and determine whether there is an oil leak by comparing the difference with the control limit. Characteristic oil leak detection method of OF cable line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21224390A JP2961832B2 (en) | 1990-08-08 | 1990-08-08 | Oil leak detection method for OF cable line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21224390A JP2961832B2 (en) | 1990-08-08 | 1990-08-08 | Oil leak detection method for OF cable line |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0493743A JPH0493743A (en) | 1992-03-26 |
JP2961832B2 true JP2961832B2 (en) | 1999-10-12 |
Family
ID=16619345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21224390A Expired - Lifetime JP2961832B2 (en) | 1990-08-08 | 1990-08-08 | Oil leak detection method for OF cable line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2961832B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4495103B2 (en) * | 2006-03-27 | 2010-06-30 | 三菱電機株式会社 | Gas leak detection device and gas leak detection method |
DE102010043482B4 (en) * | 2010-11-05 | 2012-05-24 | Siemens Aktiengesellschaft | Leak detection and leak detection in supply networks |
-
1990
- 1990-08-08 JP JP21224390A patent/JP2961832B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0493743A (en) | 1992-03-26 |
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