JP3201664B2 - Method of ringing or stopping alarm buzzer in failure monitoring system - Google Patents
Method of ringing or stopping alarm buzzer in failure monitoring systemInfo
- Publication number
- JP3201664B2 JP3201664B2 JP34361292A JP34361292A JP3201664B2 JP 3201664 B2 JP3201664 B2 JP 3201664B2 JP 34361292 A JP34361292 A JP 34361292A JP 34361292 A JP34361292 A JP 34361292A JP 3201664 B2 JP3201664 B2 JP 3201664B2
- Authority
- JP
- Japan
- Prior art keywords
- alarm buzzer
- monitoring device
- failure
- monitoring
- alarm
- 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.)
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- Alarm Systems (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Selective Calling Equipment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は複数の被監視装置群の
故障監視方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of monitoring a plurality of monitored devices.
【０００２】[0002]
【従来の技術】場所を異にして設置された電力装置など
の被監視装置群、例えばビルの各階に分散設置された複
数の電力装置群のうちの一群に故障が発生した場合、故
障に迅速に対応して正常運転状態への早期の復帰を図る
ことが必要であり、その対策として図５の系統図に示す
ような故障監視手段が用いられている。即ち各階毎に設
置された、それぞれ複数台の被監視装置（１）よりな
る、例えば３群の被監視装置群（２１）（２２）（２
３）毎に、監視装置（３１）（３２）（３３）を設け
て、これにより各群の運転状態を監視できるようにす
る。そして例えば被監視装置群（２１）に故障が発生
し、監視装置（３１）が故障を判別検出したとき、その
検出情報により各監視装置（３１）（３２）（３３）に
設けた警報ブザ回路スイッチ（４１）（４２）（４３）
のうちの（４１）をオンして、警報ブザ（５１）（５
２）（５３）のうちの（５１）を鳴動させて、被監視装
置群（２１）に故障が発生したことを保守員に報知す
る。また警報ブザ回路スイッチ（４１）（４２）（４
３）には、そのオン・オフ状態を表示する（図示しな
い）例えばＬＥＤによる表示灯を設けて、これにより保
守員が故障した被監視装置群を確認したとき、警報を発
した監視装置の警報ブザ停止スイッチ（６１）（６２）
（６３）のうちの（６１）をオフして、警報ブザの鳴動
を停止させる。一方、監視装置（３１）（３２）（３
３）からの故障検出情報を、回線集約装置（７）を経由
して遠隔監視装置（８）に伝送して、各被監視装置群
（２１）（２２）（２３）の故障発生を集約的に監視す
る手段がとられている。2. Description of the Related Art If a failure occurs in a group of monitored devices such as power devices installed at different locations, for example, a group of a plurality of power devices dispersedly installed on each floor of a building, the failure is quickly detected. Therefore, it is necessary to achieve an early return to the normal operation state in response to the above, and as a countermeasure, a failure monitoring means as shown in the system diagram of FIG. 5 is used. That is, for example, three groups of monitored devices (21), (22), and (2) each including a plurality of monitored devices (1) installed on each floor.
For each 3), a monitoring device (31), (32), (33) is provided so that the operating state of each group can be monitored. For example, when a failure occurs in the monitored device group (21) and the monitoring device (31) discriminates and detects the failure, an alarm buzzer circuit provided in each of the monitoring devices (31), (32), and (33) based on the detection information. Switch (41) (42) (43)
Of the alarm buzzer (51) (5)
2) Sound (51) out of (53) to notify maintenance personnel that a failure has occurred in the monitored device group (21). Alarm buzzer circuit switches (41), (42), (4)
3) is provided with, for example, an LED indicator (not shown) for displaying the ON / OFF state of the monitoring device. Buzzer stop switch (61) (62)
Turn off (61) of (63) to stop the alarm buzzer from sounding. On the other hand, the monitoring devices (31), (32), (3
The failure detection information from 3) is transmitted to the remote monitoring device (8) via the line aggregation device (7), and the failure occurrence of each monitored device group (21) (22) (23) is collectively determined. Monitoring means.
【０００３】[0003]
【発明が解決しようとする課題】しかし上記のような手
段では、保守員が故障した被監視装置群の設置階に居た
場合を除いて、警報ブザの鳴動を認識できにくい。また
仮に遠隔監視装置において故障の発生が認識されたとし
ても、何処に居るか判らない保守員に報知するのは困難
である。このため正常状態への復帰対策の実行の迅速を
欠き、それだけ故障規模の拡大や、サービスの低下など
を招くという解決すべき課題をもつ。However, with the above-described means, it is difficult to recognize the sound of the alarm buzzer except when the maintenance staff is on the floor where the failed monitored device group is installed. Further, even if the occurrence of a failure is recognized in the remote monitoring device, it is difficult to notify a maintenance person who does not know where the failure is. For this reason, there is a problem to be solved that lacks quick execution of a countermeasure for returning to a normal state, which leads to an increase in the scale of failure and a decrease in service.
【０００４】この発明の目的とするところは、前記のよ
うに保守員が故障発生階以外の階に居た場合にも、他階
の被監視装置群の故障の発生または復旧を迅速確実に知
ることができる手段を提示し、故障修理等の対応の遅れ
による故障規模の拡大やサービスの低下などを招かない
ようにすることにある。An object of the present invention is to promptly and surely recognize the occurrence or recovery of a failure in a monitored device group on another floor even when a maintenance person is on a floor other than the floor where a failure has occurred as described above. It is an object of the present invention to provide a means capable of performing such measures so as not to cause an increase in a failure scale or a decrease in service due to a delay in response to a failure repair or the like.
【０００５】[0005]
【課題を解決するための手段】上記発明の目的は次の手
段、即ち〔複数の被監視装置群にそれぞれ接続された監
視装置により故障を検出し、その故障検出情報により故
障発生被監視装置群の監視装置の警報ブザを鳴動させて
保守員に報知すると共に、故障検出情報を遠隔監視装置
に伝送して、集約的に監視するようにした被監視装置の
故障監視方法において、図１の系統図（図５と同一符号
部分は同等部分を示す）のように、前記全監視装置のう
ちの１台を自身が監視する被監視装置群を含む、全ての
被監視装置群（２１）（２２）……（２Ｎ）の故障検出
情報を受けて警報ブザ信号を送出して、自身の警報ブザ
を鳴動させる統括監視装置（９）とし、他の残る監視装
置を、それぞれ前記統括監視装置（９）からの警報ブザ
信号を受けて、それぞれの警報ブザを鳴動させる従属監
視装置（１０１）（１０２）……（１０Ｎ）として、１
群の電力装置群の故障発生時、統括監視装置（９）と従
属監視装置（１０１）（１０２）……（１０Ｎ）のすべ
ての警報ブザを一斉に鳴動させる〕手段によって達成さ
れる。SUMMARY OF THE INVENTION The object of the present invention is as follows: [a fault is detected by a monitoring device connected to each of a plurality of monitored device groups, and a fault occurrence monitored device group is detected based on the fault detection information. The alarm buzzer of the monitoring device is sounded to notify the maintenance staff, and the fault detection information is transmitted to the remote monitoring device, and the fault monitoring method of the monitored device is collectively monitored. As shown in the figure (the same reference numerals as those in FIG. 5 indicate the same parts), all the monitored device groups (21) (22) including the monitored device group that monitors one of the monitoring devices by itself. )... (2N) Upon receiving the failure detection information, an alarm buzzer signal is transmitted, and a general monitoring device (9) for sounding its own alarm buzzer is provided. The remaining monitoring devices are respectively referred to as the general monitoring device (9). ) From the alarm buzzer signal As dependent monitoring device (101) (102) ...... (10N) for sounding the respective alarm buzzer, 1
In the event of a failure of a group of power units, all alarm buzzers of the supervisory unit (9) and the subordinate units (101) (102)...
【０００６】[0006]
【作用】以上のようにすれば、保守員が故障発生階と異
なる階に居た場合も、各階に設置された監視装置全ての
警報ブザが一斉に鳴動するので、故障の発生を迅速確実
に知ることができ、故障復旧対応の遅れによる故障規模
の拡大およびサービス低下などを防ぎうる。[Function] According to the above, even when the maintenance staff is on a floor different from the floor where the failure occurred, all the alarm buzzers of the monitoring devices installed on each floor sound simultaneously, so that the occurrence of the failure can be quickly and reliably performed. As a result, it is possible to prevent an increase in the failure scale and a decrease in service due to a delay in the recovery from the failure.
【０００７】[0007]
【実施例】以下に図２を用いて本発明の実施例を説明す
る。図２において（２１）（２２）（２３）は階を異に
して設置された被監視装置群、（１０１）（１０２）は
従属監視装置であって、各被監視装置群（２１）（２
３）の運転状態を監視する。（９）は統括監視装置であ
って、次の各部から形成される。（１１）は統括監視装
置（９）の主体をなすＣＰＵ、（１２）はメモリであっ
て、図３および図４に示す検出情報の処理プログラムや
処理のための各種データを記憶している。（１３）は第
１通信制御部であって、ＣＰＵ（１１）と従属監視装置
（１０１）（１０２）間において情報の送受信を行う。
（１４）は第２通信制御部であって、ＣＰＵ（１１）と
被監視装置群（２２）間において情報の送受信を行う。
（１５）は第３通信制御部であって、回線集約装置
（７）を介してＣＰＵ（１１）と遠隔監視装置（８）間
で情報の送受信を行う。（１６）は入出力インタフェー
ス回路、（４２）は警報ブザ回路スイッチ、（６２）は
警報ブザ停止スイッチ、（５２）は警報ブザであって、
これらの動作情報は入出力インタフェース回路（１６）
を介してＣＰＵ（１１）と送受信される。An embodiment of the present invention will be described below with reference to FIG. In FIG. 2, (21), (22), and (23) denote monitored device groups installed on different floors, and (101) and (102) denote subordinate monitoring devices, and each monitored device group (21) (2)
The operation state of 3) is monitored. (9) is an integrated monitoring device, which is formed from the following units. (11) is a CPU serving as a main body of the integrated monitoring device (9), and (12) is a memory, which stores a detection information processing program shown in FIGS. 3 and 4 and various data for processing. (13) is a first communication control unit for transmitting and receiving information between the CPU (11) and the slave monitoring devices (101) and (102).
(14) is a second communication control unit, which includes a CPU (11) and
Information is transmitted and received between the monitored device group (22).
(15) is a third communication control unit for transmitting and receiving information between the CPU (11) and the remote monitoring device (8) via the line aggregation device (7). (16) is an input / output interface circuit, (42) is an alarm buzzer circuit switch, (62) is an alarm buzzer stop switch, (52) is an alarm buzzer,
The operation information is input / output interface circuit (16)
Is transmitted / received to / from the CPU (11).
【０００８】[0008]
【動作】ＣＰＵ（１１）は図３および図４に示すフロー
チャートの要領で処理を行う。[Operation] The CPU (11) performs processing in the manner of the flowcharts shown in FIGS.
【０００９】〔Ａ〕 通常時 保守員が統括監視装置（９）の警報ブザ回路スイッチ
（４２）を押すか、従属監視装置（１０１）（１０２）
の何れかの警報ブザ回路スイッチ（４１）（４３）の何
れか一方を押す。するとその状態情報は入出力インタフ
ェース（１６）または通信制御部（１３）を介してＣＰ
Ｕ（１１）に送信される（ステップａ）。このときメモ
リ（１２）における警報ブザ回路の状態がオフの場合
（ステップｂ）、警報ブザの回路状態を記憶し（ステッ
プｃ）、警報ブザ回路スイッチ（４２）の表示灯を点灯
させる（ステップｄ）と共に全従属監視装置（１０１）
（１０２）の警報ブザ回路スイッチ（４１）（４３）へ
のオンの指示を行い（ステップｅ）、被監視装置群の故
障の発生を待機する。[A] Normally, the maintenance person presses the alarm buzzer circuit switch (42) of the supervisory monitoring device (9) or the subordinate monitoring devices (101) and (102).
Press any one of the alarm buzzer circuit switches (41) and (43). Then, the status information is transferred to the CP via the input / output interface (16) or the communication control unit (13).
It is transmitted to U (11) (step a). At this time, when the state of the alarm buzzer circuit in the memory (12) is off (step b), the circuit state of the alarm buzzer is stored (step c), and the indicator of the alarm buzzer circuit switch (42) is turned on (step d). ) And all dependent monitoring devices (101)
The alarm buzzer circuit switches (41) and (43) in (102) are instructed to be turned on (step e), and the monitoring of the monitored device group is awaited.
【００１０】〔Ｂ〕 被監視装置における故障の発生時 被監視装置群（２１）（２２）（２３）の何れか一群に
異常が発生し、これが例えば被監視装置群（２２）の故
障であるときは、統括監視装置（９）はその故障情報を
通信制御部（１４）を介して受信する。また被監視装置
群（２１）または（２３）が故障の場合には従属監視装
置（１０１）または（１０２）からの故障情報を通信制
御部（１３）を介して受信する。そして故障が発生した
ことを検知すると（ステップｆ）、メモリ（１２）の警
報ブザ回路スイッチ状態がオンの場合（ステップｇ）
は、警報ブザ（５２）に対して鳴動指示を行い（ステッ
プｈ）、これと同時に全従属監視装置（１０１）（１０
２）の警報ブザ（５１）（５３）へも鳴動指示を行う
（ステップｉ）ことにより、全監視装置の警報ブザが一
斉に鳴動する。[B] When a failure occurs in the monitored device An abnormality occurs in any one of the monitored device groups (21), (22), and (23). This is, for example, a failure of the monitored device group (22). At this time, the supervisory device (9) receives the failure information via the communication control unit (14). When the monitored device group (21) or (23) has a failure, failure information from the subordinate monitoring device (101) or (102) is received via the communication control unit (13). When it is detected that a failure has occurred (step f), the alarm buzzer circuit switch state of the memory (12) is on (step g).
Issues a sounding instruction to the alarm buzzer (52) (step h), and at the same time, all the subordinate monitoring devices (101) (10
By issuing a sounding instruction also to the alarm buzzers (51) and (53) in 2) (step i), the alarm buzzers of all the monitoring devices sound simultaneously.
【００１１】〔Ｃ〕 保守員の故障発生確認後の操作 保守員が警報ブザ停止スイッチ（６１）（６２）（６
３）の何れかを押したことを検知すると（ステップ
ｊ）、警報ブザが鳴動中であれば統括監視装置（９）の
警報ブザ（５２）の鳴動停止を行う（ステップｋ，ｌ）
と共に、全従属監視装置（１０１）（１０２）の警報ブ
ザ（５１）（５３）の鳴動停止の指示を行う（ステップ
ｌ’）ことにより、全監視装置の警報ブザの鳴動が一斉
に停止する。[C] Operation after Confirming the Failure Occurrence of the Maintenance Person The maintenance person operates the alarm buzzer stop switch (61) (62) (6)
When it is detected that any one of 3) is pressed (step j), if the alarm buzzer is sounding, the alarm buzzer (52) of the overall monitoring device (9) is stopped from sounding (steps k and l).
At the same time, by issuing an instruction to stop the sounding of the alarm buzzers (51) and (53) of all the dependent monitoring devices (101) and (102) (step l '), the sounding of the alarm buzzers of all the monitoring devices is stopped all at once.
【００１２】〔Ｄ〕 警報ブザ鳴動の禁止 メモリ（１２）の警報ブザの回路状態がオンの場合（ス
テップｂ）、警報ブザが鳴動中であれば、警報ブザの鳴
動停止を行い（ステップｍ，ｎ）、警報ブザ回路のオフ
状態を記憶し（ステップｏ）、警報ブザ回路スイッチの
表示灯を消灯させる（ステップｐ）と共に、全従属監視
装置（１０１）（１０２）の警報ブザ回路スイッチ（４
１）（４３）のオフ指示を行う（ステップｑ）。[D] Prohibition of alarm buzzer sounding If the circuit state of the alarm buzzer in the memory (12) is ON (step b), and if the alarm buzzer is sounding, the sounding of the alarm buzzer is stopped (step m, m). n), the OFF state of the alarm buzzer circuit is stored (step o), the indicator lamp of the alarm buzzer circuit switch is turned off (step p), and the alarm buzzers of all the subordinate monitoring devices (101) and (102) are stored. Circuit switch (4
1) Instruct (43) to turn off (step q).
【００１３】[0013]
【発明の効果】以上のようにこの発明では、保守員がビ
ルのどの階に居ても、被監視装置群の故障発生を迅速確
実に知ることができるので、迅速な正常運転状態への復
旧を可能とする。As described above, according to the present invention, it is possible to quickly and surely know the occurrence of a failure in a group of monitored devices, regardless of the floor of a building where maintenance personnel are located, so that a quick restoration to a normal operation state can be achieved. Is possible.
【図１】この発明にかかる故障監視方法の説明図であ
る。FIG. 1 is an explanatory diagram of a failure monitoring method according to the present invention.
【図２】この発明にかかる故障監視方法の一実施例の説
明図である。FIG. 2 is an explanatory diagram of one embodiment of a failure monitoring method according to the present invention.
【図３】この発明にかかる故障監視方法における統括監
視装置の動作を示すフローチャートである。FIG. 3 is a flowchart showing the operation of the overall monitoring device in the failure monitoring method according to the present invention.
【図４】この発明にかかる故障監視方法における統括監
視装置の動作を示すフローチャートである。FIG. 4 is a flowchart showing the operation of the supervisory device in the failure monitoring method according to the present invention.
【図５】従来の故障監視方法の説明図である。FIG. 5 is an explanatory diagram of a conventional failure monitoring method.
（１） 被監視装置 （２１） 被監視装置群 （２２） 被監視装置群 （２３） 被監視装置群 （３１） 監視装置 （３２） 監視装置 （３３） 監視装置 （４１） 警報ブザ回路スイッチ （４２） 警報ブザ回路スイッチ （４３） 警報ブザ回路スイッチ （５１） 警報ブザ （５２） 警報ブザ （５３） 警報ブザ （６１） 警報ブザ停止スイッチ （６２） 警報ブザ停止スイッチ （６３） 警報ブザ停止スイッチ （７） 回線集約装置 （８） 遠隔監視装置 （９） 統括監視装置 （１０１） 従属監視装置 （１０２） 従属監視装置 （１１） ＣＰＵ （１２） メモリ （１３） 通信制御部 （１４） 通信制御部 （１５） 通信制御部 （１６） 入出力インタフェース (1) Monitored device (21) Monitored device group (22) Monitored device group (23) Monitored device group (31) Monitoring device (32) Monitoring device (33) Monitoring device (41) Alarm buzzer circuit switch ( 42) Alarm buzzer circuit switch (43) Alarm buzzer circuit switch (51) Alarm buzzer (52) Alarm buzzer (53) Alarm buzzer (61) Alarm buzzer stop switch (62) Alarm buzzer stop switch (63) Alarm buzzer stop switch ( 7) Line aggregation device (8) Remote monitoring device (9) Overall monitoring device (101) Dependent monitoring device (102) Dependent monitoring device (11) CPU (12) Memory (13) Communication control unit (14) Communication control unit ( 15) Communication controller (16) I / O interface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 末永 裕章 東京都千代田区内幸町１丁目１番６号 日本電信電話株式会社内 (56)参考文献 特開 平２−224199（ＪＰ，Ａ) 特開 平３−235199（ＪＰ，Ａ) 特開 平４−299500（ＪＰ，Ａ) 実開 平４−40397（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G08B 23/00 - 31/00 H02J 13/00 H04Q 9/00 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Suenaga 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-2-224199 (JP, A) JP-A Heisei 3-235199 (JP, A) JP-A-4-299500 (JP, A) JP-A-4-40397 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G08B 23/00 -31/00 H02J 13/00 H04Q 9/00
Claims (1)
た少なくとも警報ブザ回路スイッチ，警報ブザ及び警報
ブザ停止スイッチを有する監視装置により故障を検出
し、その故障検出情報により故障発生の前記被監視装置
群に接続された前記監視装置の警報ブザを鳴動させて保
守員に報知する故障監視システムにおいて、前記複数の監視装置のうちの１台を統括監視装置とする
と共に、他の残りの前記監視装置を従属監視装置とし、
前記統括監視装置及び前記従属監視装置の前記警報ブザ
回路スイッチ，前記警報ブザ又は前記警報ブザ停止スイ
ッチの動作状態を前記統括監視装置で検知できるように
すると共に、前記警報ブザ回路スイッチ，前記警報ブザ
又は前記警報ブザ停止スイッチの動作を制御をできるよ
うにし、前記いずれかの警報ブザ回路スイッチのオン状
態を前記統括監視装置で検出したとき、該統括監視装置
から該統括監視装置及び前記従属監視装置の前記警報ブ
ザ回路スイッチをオンにして監視状態となし、該監視状
態において前記複数の被監視装置群のうちのいずれかの
被監視装置に故障が発生したとき、この故障発生信号を
前記統括監視装置で検出し、該統括監視装置及び前記従
属監視装置の前記警報ブザを鳴動させて故障発生を保守
員に報知せしめると共に、前記故障の修復対応により保
守員が前記統括監視装置又は前記従属監視装置のいずれ
かの前記警報ブザ停止スイッチを操作したとき、該警報
ブザ停止スイッチの動作を前記統括監視装置で検出し、
該統括監視装置からの前記警報ブザの鳴動停止信号によ
り該統括監視装置及び前記従属監視装置の前記警報ブザ
の鳴動を停止せしめるようにしたことを特徴とする故障
監視システムにおける警報ブザを一斉鳴動または停止さ
せる方法。 At least an alarm buzzer circuit switch, an alarm buzzer, and an alarm connected to a plurality of monitored device groups, respectively.
Buzzer detects a failure by the monitoring device having a stop switch, the fault monitoring system for informing a customer engineer by sounding the alarm buzzer of the connected to the monitored device group failure the monitoring device by the failure detection information, One of the plurality of monitoring devices is a general monitoring device.
Along with the other remaining monitoring devices as slave monitoring devices,
The alarm buzzer of the integrated monitoring device and the dependent monitoring device
Circuit switch, alarm buzzer or alarm buzzer stop switch
Switch can be detected by the general monitoring device.
The alarm buzzer circuit switch and the alarm buzzer
Alternatively, the operation of the alarm buzzer stop switch can be controlled.
The alarm buzzer circuit switch is turned on.
When the status is detected by the general monitoring device, the general monitoring device
From the alarm monitor of the central monitoring device and the subordinate monitoring device.
Turns on the circuit switch to enter the monitoring state,
In one of the plurality of monitored device groups
When a failure occurs in the monitored device, this failure occurrence signal is
Detected by the general monitoring device, the general monitoring device and the slave
The alarm buzzer of the metal monitor is sounded to maintain the failure
Notify the staff and maintain
If the guard is either the supervising device or the subordinate monitoring device
When the alarm buzzer stop switch is operated,
The operation of the buzzer stop switch is detected by the general monitoring device,
In response to a stop signal of the alarm buzzer from the general monitoring device.
The alarm buzzer of the central monitoring device and the subordinate monitoring device
Failure characterized by stopping the ringing of
Alarm buzzer sounds or stops in the monitoring system
How to let.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34361292A JP3201664B2 (en) | 1992-12-01 | 1992-12-01 | Method of ringing or stopping alarm buzzer in failure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34361292A JP3201664B2 (en) | 1992-12-01 | 1992-12-01 | Method of ringing or stopping alarm buzzer in failure monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06176281A JPH06176281A (en) | 1994-06-24 |
| JP3201664B2 true JP3201664B2 (en) | 2001-08-27 |
Family
ID=18362885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34361292A Expired - Fee Related JP3201664B2 (en) | 1992-12-01 | 1992-12-01 | Method of ringing or stopping alarm buzzer in failure monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3201664B2 (en) |
-
1992
- 1992-12-01 JP JP34361292A patent/JP3201664B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06176281A (en) | 1994-06-24 |
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