JPH048732B2 - - Google Patents
Info
- Publication number
- JPH048732B2 JPH048732B2 JP56106882A JP10688281A JPH048732B2 JP H048732 B2 JPH048732 B2 JP H048732B2 JP 56106882 A JP56106882 A JP 56106882A JP 10688281 A JP10688281 A JP 10688281A JP H048732 B2 JPH048732 B2 JP H048732B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- water level
- electrode
- electrode rod
- confirming
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 238000001514 detection method Methods 0.000 claims description 19
- 230000005856 abnormality Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 230000007257 malfunction Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
- G01F23/242—Mounting arrangements for electrodes
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電極棒を用いた水位検出端による水
位の制御において、電極棒の動作が正常か否かを
確認する電極棒の故障を発見するための異常検出
の確認方法に確認するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention detects failures in the electrode rod to check whether the operation of the electrode rod is normal or not in water level control using a water level detection end using an electrode rod. This is a confirmation method for abnormality detection.
従来、水位を検出するのに電極棒を用いる方法
は、多く用いられているが、その装置として、相
互に異なる下端高さを有する複数本の電極棒を備
え、各電極棒の下端と液体との接触によりON信
号が発せられ、接触がないときにOFF信号が発
せられるようにした水位検出装置が知られてい
る。
Conventionally, the method of using electrode rods to detect the water level has been widely used, but the device is equipped with a plurality of electrode rods with different lower end heights, and the lower end of each electrode rod is connected to the liquid. A water level detection device is known in which an ON signal is emitted when there is contact, and an OFF signal is emitted when there is no contact.
従来のこの水位検出装置では、例えばボイラの
缶水などの場合に、不純物の濃度が高く、電極棒
にスケールが付着して絶縁されて水位が検知でき
なくなつたり、短絡による動作不良などを起こ
し、これを知らずに用いていると水位の異常上昇
又は異常低下を発見することができず、不測の事
故の原因となるおそれがあつて問題であつた。
With conventional water level detection devices, when using canned water from a boiler, for example, the concentration of impurities is high, scale can adhere to the electrode rod and insulate it, making it impossible to detect the water level, or causing malfunctions due to short circuits. This was a problem because, if used without knowing this, it would be impossible to detect an abnormal rise or fall in the water level, which could lead to an unexpected accident.
本発明は、これら従来の欠点を排除しようとす
るもので電極棒の導通状態を検出し、導通信号の
組み合わせの状態又は推移のモードを判断するた
めの判断機構により電極棒の異常状態を検出する
ことが可能であり、絶縁や短絡に基づく異常を直
ちに発見し、事故を未然に防ぐことができる水位
検出端の異常状態を確認する方法を提供すること
を目的とするものである。 The present invention aims to eliminate these conventional drawbacks, and detects the conduction state of the electrode rod and detects an abnormal state of the electrode rod using a judgment mechanism for determining the combination state or transition mode of the conduction signal. The purpose of the present invention is to provide a method for checking an abnormal state of a water level detection end, which can immediately detect abnormalities due to insulation or short circuits, and prevent accidents.
本発明は、相互に異なる下端高さを有する独立
して作動する３本以上の電極棒を備え、各電極棒
の下端と液体との接触によりON信号が発せら
れ、接触がないときにOFF信号が発せられるよ
うにした水位検出端の異常確認方法において、前
記電極棒の信号を検出し、該信号の検出状態をあ
らかじめ定められた各電極棒の故障信号と対比
し、該信号が前記故障信号に合致した場合に、電
極棒のいずれかが故障であると判断して異常状態
を確認することを特徴とする水位検出端の異常確
認方法である。
The present invention includes three or more independently operating electrode rods having different lower end heights, and an ON signal is generated when the lower end of each electrode comes into contact with a liquid, and an OFF signal is generated when there is no contact. In the method for confirming an abnormality of a water level detection end in which a signal is emitted, a signal from the electrode rod is detected, the detection state of the signal is compared with a predetermined failure signal of each electrode rod, and the signal is determined to be the failure signal. This is a method for confirming an abnormality in a water level detection end, which is characterized in that if the above conditions match, it is determined that one of the electrode rods is malfunctioning, and an abnormal state is confirmed.
本発明の水位検出端の異常確認方法では、ボイ
ラの運転中に水面１の水位を検出するのに、電極
棒２，３，４，５からのON−OFF信号をチエツ
クし、信号の組み合わせの状態又は測定時点が変
わるときに信号の組み合わせが変わるモードを理
論的に定め、それに矛盾する信号を故障信号とし
てあらかじめ定め、該信号と故障信号とを対比し
て判断する機構で検出することにより異常を発見
する。
In the method for confirming abnormalities at the water level detection end of the present invention, in order to detect the water level at water surface 1 during boiler operation, ON-OFF signals from electrode rods 2, 3, 4, and 5 are checked, and the combination of signals is checked. The mode in which the combination of signals changes when the state or measurement time changes is theoretically determined, a signal that contradicts this is determined in advance as a failure signal, and a mechanism that compares and determines the signal and the failure signal detects the abnormality. Discover.
例えば、或る測定時点において、下端高さの低
位のものが信号（OFF信号）であるにも拘ら
ず、それより上位のものが信号（ON信号）を
発している場合は、故障であると判断し、水位検
出の電極棒自体の故障を簡便に認知できるもので
ある。 For example, at a certain measurement point, if something with a lower bottom height is emitting a signal (OFF signal), but something higher than that is emitting a signal (ON signal), it is assumed that there is a malfunction. This allows you to easily recognize the failure of the electrode rod itself for water level detection.
本発明を実施例につき図面を用いて説明する。 The present invention will be explained with reference to the drawings based on examples.
図において、ボイラの缶水などの水面１の水位
を検出するために、検出端として４本の電極棒
２，３，４，５が備えられている。各電極棒２，
３，４，５の下端は高さが順次異ならしめてあ
り、各下端高さは次の如き水位と一致する。 In the figure, four electrode rods 2, 3, 4, and 5 are provided as detection ends in order to detect the water level of a water surface 1 such as canned water in a boiler. Each electrode rod 2,
The lower ends of Nos. 3, 4, and 5 have different heights in sequence, and each lower end height corresponds to the following water level.
電極棒２…レベルＨ…これを越えたら給水ポンプ
を停止せしめる水位
電極棒３…レベルＭ…これ以下ならば給水ポンプ
を運転せしめる水位
電極棒４…レベルＬ…これ以上のレベルならばボ
イラの燃焼を行わしめる水位
電極棒５…レベルＣ…基準水位
各電極棒２，３，４，５においては、その下端
が液体に接触しているときに導通があり、信号
を発し、接触していないときには信号を発しない
（この状態を、信号がであるとする）ような信
号回路に接続されている。Electrode 2...Level H...Water level that will stop the feed water pump if it exceeds this Electrode 3...Level M...Water level that will cause the water pump to operate if it is below this Electrode 4...Level L...If it is above this level, the boiler will burn Water level electrode rod 5...Level C...reference water level In each electrode rod 2, 3, 4, and 5, when the lower end is in contact with the liquid, there is continuity and a signal is emitted, and when it is not in contact, a signal is generated. It is connected to a signal circuit that does not emit a signal (this state is considered to be a signal).
ボイラの運転中に水面１の水位を検出するの
に、電極棒２，３，４，５からの信号をチエツ
ク、信号の組み合わせの状態又は測定時点が変わ
るときに信号の組み合わせが変わるモードを理論
的矛盾として判断することにより異常を発見す
る。 To detect the water level of water surface 1 during boiler operation, check the signals from electrode rods 2, 3, 4, and 5, and theoretically explain the mode in which the signal combination changes when the state of the signal combination or the measurement time changes. Anomalies are discovered by determining them as contradictions.
例えば、或る測定時点において、下端高さの低
位のものが信号（OFF信号）であるにも拘ら
ず、それより上位のものが信号（ON信号）を
発している場合は、故障であると判断する。 For example, at a certain measurement point, if something with a lower bottom height is emitting a signal (OFF signal), but something higher than that is emitting a signal (ON signal), it is assumed that there is a malfunction. to decide.
例えば
Ｈ Ｍ Ｌ Ｃ
０ ０ １ ０
１ １ ０ １
０ １ ０ １
０ １ ０ ０
１ ０ １ １
１ ０ ０ ０
のような場合に故障であると推定することができ
る。 For example, a failure can be estimated in a case such as H M L C 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 1 0 0 0.
また、水位の変動は、例えば７ミリ秒程度の極
めて短時間には急激な水位の変動は起こり得ない
ので或る時点の検出における信号の組み合わせか
ら、次の時点の検出における信号の組み合わせに
推移する変化が、２個以上の電極棒の信号が同時
に０から１へ、或いは１から０へ変化した場合に
は少なくとも何れか一つの電極棒のラインが故障
であると推定する。 Furthermore, since rapid water level fluctuations cannot occur in an extremely short period of time, e.g. about 7 milliseconds, the combination of signals detected at a certain point in time changes to the combination of signals detected at the next point in time. If the signals of two or more electrode rods change from 0 to 1 or from 1 to 0 at the same time, it is estimated that at least one of the electrode rod lines is faulty.
さらに、例えば、一定時間ごとに給水ポンプを
運転したまま燃焼を停止して水位を漸増せしめ、
低位のものから順次信号１を発することを確か
め、また逆に、燃焼を続けたまま給水ポンプを停
止して水位を漸減せしめ、高位のものから順次信
号０となることを確かめ、正常なることを確認
し、そうでない場合に故障であると推定する。ま
た、このように水位を漸増又は漸減せしめ、所定
の時間経過後にもなお、最高位のものが信号１を
発しないか、又は最低位のものが信号０にならな
い場合には故障と推定する。 Furthermore, for example, the water level is gradually increased by stopping combustion while the water pump is running at regular intervals,
Make sure that the signal 1 is emitted from the lowest level, and conversely, stop the water pump while combustion continues to gradually reduce the water level, and check that the signal 0 goes from the highest level to confirm that everything is normal. Check, and if not, assume a failure. In addition, if the water level is gradually increased or decreased in this way, and even after a predetermined period of time has elapsed, if the highest level does not emit a signal 1 or the lowest level does not become a signal 0, a failure is assumed.
本発明は、水位検出端の異常確認方法におい
て、前記電極棒の信号を検出し、例えば前記信号
の検出状態が下端の高さの下位ものがOFF信号
を発しているにも拘らず、それより上位のものが
ON信号を発している場合等に電極棒が故障であ
ることを判断することにより複数の電極棒を用い
て水位を検出する際に、電極棒の信号の組み合わ
せの中に潜在的に存在していた情報、即ち論理的
矛盾を引き出し、検出することで装置の故障を早
期かつ効果的に検知し、過剰運転その他異常状態
下での作動を続行させることがなく、水位検出端
の回路が正常に作動していることを、常に確実に
確認することができ、装置内の絶縁や、短絡に基
づく水位検出端の故障による異常を発見でき特別
に新たな水位検出端を設備することなく異常水位
による事故を未然に防止することができる。
The present invention is a method for confirming an abnormality of a water level detection end, in which a signal from the electrode rod is detected, and the detection state of the signal is, for example, even though the lower end of the lower end is emitting an OFF signal. the top one
When detecting the water level using multiple electrodes, it is determined that the electrode is malfunctioning when it is emitting an ON signal. By extracting and detecting information, that is, logical contradictions, equipment failure can be detected early and effectively, preventing continued operation under excessive operation or other abnormal conditions, and ensuring that the circuit at the water level detection end is properly operated. You can always reliably confirm that the device is working, and you can discover abnormalities caused by malfunctions of the water level detection terminal due to insulation within the device or short circuits, and can detect abnormal water levels without installing a new water level detection terminal. Accidents can be prevented.
図面は本発明の実施例の電極棒配置説明図であ
る。
１……水面、２……電極棒、３……電極棒、４
……電極棒、５……電極棒。
The drawing is an explanatory diagram of electrode rod arrangement according to an embodiment of the present invention. 1... Water surface, 2... Electrode rod, 3... Electrode rod, 4
... Electrode rod, 5... Electrode rod.
Claims (1)
する３本以上の電極棒を備え、各電極棒の下端と
液体との接触によりON信号が発せられ、接触が
ないときにOFF信号が発せられるようにした水
位検出端の異常確認方法において、前記電極棒の
信号を検出し、該信号の検出状態をあらかじめ定
められた各電極棒の故障信号と対比し、該信号が
前記故障信号に合致した場合に、電極棒のいずれ
かが故障であると判断して異常状態を確認するこ
とを特徴とする水位検出端の異常確認方法。1 Equipped with three or more independently operating electrode rods with mutually different lower end heights, an ON signal is emitted when the lower end of each electrode comes into contact with the liquid, and an OFF signal is emitted when there is no contact. In the above method for confirming an abnormality of a water level detection end, a signal from the electrode rod is detected, the detection state of the signal is compared with a predetermined failure signal of each electrode rod, and the signal matches the failure signal. 1. A method for confirming an abnormality at a water level detection end, the method comprising determining that one of the electrode rods is malfunctioning and confirming the abnormal state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106882A JPS589029A (en) | 1981-07-10 | 1981-07-10 | Confirming device for operation of water level detecting end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106882A JPS589029A (en) | 1981-07-10 | 1981-07-10 | Confirming device for operation of water level detecting end |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63-122046A Division JPH01422A (en) | 1988-05-20 | Water level detection end operation confirmation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS589029A JPS589029A (en) | 1983-01-19 |
| JPH048732B2 true JPH048732B2 (en) | 1992-02-18 |
Family
ID=14444866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56106882A Granted JPS589029A (en) | 1981-07-10 | 1981-07-10 | Confirming device for operation of water level detecting end |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS589029A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01263453A (en) * | 1988-04-14 | 1989-10-19 | Matsushita Electric Ind Co Ltd | Water level detecting device |
| JPH03105101A (en) * | 1989-09-18 | 1991-05-01 | Noritz Corp | Steam generator |
| JP5252354B2 (en) * | 2010-05-10 | 2013-07-31 | 株式会社日本イトミック | Scale detection sensor and scale detection method |
| GB201214658D0 (en) | 2012-08-16 | 2012-10-03 | Univ Bradford | Conductivity device |
-
1981
- 1981-07-10 JP JP56106882A patent/JPS589029A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS589029A (en) | 1983-01-19 |
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