JPH04261326A - Power failure monitoring device - Google Patents
Power failure monitoring deviceInfo
- Publication number
- JPH04261326A JPH04261326A JP3006726A JP672691A JPH04261326A JP H04261326 A JPH04261326 A JP H04261326A JP 3006726 A JP3006726 A JP 3006726A JP 672691 A JP672691 A JP 672691A JP H04261326 A JPH04261326 A JP H04261326A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- power
- relay
- circuit units
- relay contact
- 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
- 238000012806 monitoring device Methods 0.000 title claims description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 230000005856 abnormality Effects 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000004397 blinking Effects 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Audible And Visible Signals (AREA)
- Emergency Alarm Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、複数の回路ユニットを
有する制御盤等の電源装置に用いられる電源異常監視装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply abnormality monitoring device used in a power supply device such as a control panel having a plurality of circuit units.
【０００２】0002
【従来の技術】従来、交流電源で作動する回路ユニット
及び又は直流電源で作動する回路ユニットを複数備えた
制御盤等の電源装置にあっては、主電源のメインスイッ
チを介して各回路ユニットへ電源ラインを分岐し、分岐
ライン毎に回路ユニットに対する電源供給をオン、オフ
できるように、スイッチ、ノンヒューズブレーカ（ＮＦ
Ｂ）、リレー接点等を設けている。[Prior Art] Conventionally, in a power supply device such as a control panel equipped with a plurality of circuit units operated by AC power supply and/or circuit units operated by DC power supply, each circuit unit is connected to each circuit unit via a main switch of the main power supply. Switches and non-fuse breakers (NF
B), relay contacts, etc. are provided.
【０００３】このような電源装置における電源監視は、
通常、主電源の二次側に電源監視灯を接続しており、主
電源を投入すると電源監視灯が点灯して正常に電源供給
が行われていることを表示するようにしている。[0003] Power supply monitoring in such a power supply device is as follows:
Usually, a power monitoring light is connected to the secondary side of the main power supply, and when the main power is turned on, the power monitoring light lights up to indicate that power is being supplied normally.
【０００４】0004
【発明が解決しようとする課題】しかしながら、このよ
うな従来の電源監視にあっては、主電源から分岐された
ユニット電源を個別に監視していなかったため、ユニッ
ト電源の遮断に起因した制御盤の動作異常が起きた場合
、電源表示灯が点灯していることからユニット電源が遮
断状態にあることを発見するまでに相当手間どり、制御
盤の復旧作業に時間がかかる問題があった。[Problems to be Solved by the Invention] However, in such conventional power supply monitoring, unit power supplies branched from the main power supply were not individually monitored. When an abnormality occurs, it takes a considerable amount of time to discover that the unit's power supply is cut off because the power indicator light is on, and it takes time to restore the control panel.
【０００５】本発明は、このような従来の問題点に鑑み
てなされたもので、電源異常が起きた場合、複数の回路
ユニットのいずれかの電源が遮断状態にあることが直ち
にわかり、電源復旧を迅速にできる電源異常監視装置を
提供することを目的とする。The present invention has been made in view of these conventional problems. When a power supply abnormality occurs, it is immediately known that the power supply of one of the plurality of circuit units is cut off, and the power supply can be restored. The purpose of the present invention is to provide a power supply abnormality monitoring device that can quickly perform the following steps.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
本発明は次のように構成する。尚、実施例図面中の符号
を併せて示す。まず本発明は、複数の回路ユニット１０
−１〜１０−４を有し、回路ユニット１０−１〜１０−
４毎或いは複数の回路ユニットでなるユニットグループ
毎に電源供給を断接するスイッチ、ノンヒューズブレー
カ、ヒューズ又はリレー接点等の電源断接手段１６−１
〜１６−４を備えた電源装置を対象とする。[Means for Solving the Problems] In order to achieve this object, the present invention is constructed as follows. In addition, the reference numerals in the drawings of the embodiments are also shown. First, the present invention provides a plurality of circuit units 10.
-1 to 10-4, and has circuit units 10-1 to 10-
Power supply connection/disconnection means 16-1 such as a switch, a non-fuse breaker, a fuse, or a relay contact, which connects/disconnects the power supply for each circuit unit 4 or for each unit group consisting of a plurality of circuit units.
-16-4.
【０００７】このような電源装置の電源監視装置として
本発明にあっては、電源断接手段１６−１〜１６−４の
二次側に設けられ回路ユニット側への電源供給の有無を
検出する電源供給検出手段Ｒ１〜Ｒ４と、電源供給検出
手段Ｒ１〜Ｒ４の検出出力ｒ１〜ｒ４に基づいて回路ユ
ニット１０−１〜１０−４又はユニットグループの電源
異常を表示する電源異常表示手段（１８，２０，２２）
とを設けたことを特徴とする。According to the present invention, a power monitoring device for such a power supply device is provided on the secondary side of the power supply connection/disconnection means 16-1 to 16-4 to detect the presence or absence of power supply to the circuit unit side. Power supply detection means R1 to R4 and power supply abnormality display means (18, 20, 22)
It is characterized by having the following.
【０００８】ここで電源異常表示手段は、電源断接手段
１６−１〜１６−４の二次側に設けた電源供給検出手段
Ｒ１〜Ｒ４の全てで電源正常が検出された場合は電源監
視灯２２を点灯させ、少なくとも１つのユニット電源の
異常が検出された場合には電源監視灯２２を点滅させ、
電源断接手段１６−１〜１６−４の元電源の遮断を検出
した場合には電源監視灯２２を消灯させることを特徴と
する。[0008] Here, the power supply abnormality display means is a power supply monitoring light when a normal power supply is detected by all of the power supply detection means R1 to R4 provided on the secondary side of the power supply connection/disconnection means 16-1 to 16-4. 22, and if an abnormality in at least one unit power supply is detected, the power monitoring light 22 is blinked,
A feature of the present invention is that the power monitoring light 22 is turned off when a cutoff of the source power source of the power supply connection/disconnection means 16-1 to 16-4 is detected.
【０００９】[0009]
【作用】このような構成を備えた本発明の電源監視装置
によれば、回路ユニットのいずれかに対する電源供給が
遮断される電源異常が起きた場合は、ユニット電源に異
常が起きたことが表示され、制御盤内に設けられたユニ
ット電源のノンヒューズブレーカ（ＮＦＢ）等をチェッ
クすることで直ちに電源異常を発見することができ、ユ
ニット電源の遮断に起因した制御盤の動作異常を速かに
復旧させることができる。[Operation] According to the power supply monitoring device of the present invention having such a configuration, when a power supply abnormality occurs in which the power supply to one of the circuit units is cut off, an indication that an abnormality has occurred in the unit power supply is displayed. By checking the non-fuse breaker (NFB) etc. of the unit power supply installed in the control panel, it is possible to immediately discover power supply abnormalities, and quickly detect malfunctions in the control panel caused by cutting off the unit power supply. It can be restored.
【００１０】0010
【実施例】図１は本発明の一実施例を示した実施例回路
図である。図１において、１２は主電源ＡＣ１００Ｖを
オン、オフするノンヒューズブレーカ（以下「ＮＦＢ」
という）であり、ＮＦＢ１２の二次側には主電源の断接
を検出するためのリレーＲ０を接続している。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a circuit diagram showing an embodiment of the present invention. In Figure 1, 12 is a non-fuse breaker (hereinafter referred to as "NFB") that turns on and off the main power supply AC100V.
), and a relay R0 for detecting connection/disconnection of the main power source is connected to the secondary side of the NFB 12.
【００１１】１０−１〜１０−４は回路ユニットであり
、回路ユニット１０−１は交流電源で直接駆動でき、回
路ユニット１０−２〜１０−３はレギュレータ２４−１
による所定の直流電源で駆動され、更に回路ユニット１
０−４はレギュレータ２４−２による所定の直流電源で
駆動される。勿論、回路ユニットの数は必要に応じて適
宜に設けられ、複数の回路ユニットをグループ化して共
通に電源供給を行ってもよい。10-1 to 10-4 are circuit units, the circuit unit 10-1 can be directly driven by an AC power supply, and the circuit units 10-2 to 10-3 are driven by a regulator 24-1.
The circuit unit 1 is driven by a predetermined DC power supply.
0-4 are driven by a predetermined DC power source from the regulator 24-2. Of course, the number of circuit units may be appropriately set as required, and a plurality of circuit units may be grouped and commonly supplied with power.
【００１２】回路ユニット１０−１に対しては電源断接
手段としてのＮＦＢ１６−１を介して主電源ＡＣ１００
Ｖが分岐供給される。このＮＦＢ１６−１の二次側には
回路ユニット１０−１に対する電源供給の有無を検出す
る電源供給検出手段としてのリレーＲ１が接続される。
レギュレータ２４−１にはＮＦＢ１４を介して主電源Ａ
Ｃ１００Ｖが分岐供給され、レギュレータ２４−１から
の直流電源はＮＦＢ１６−２，１６−３を介して回路ユ
ニット１０−２，１０−３にそれぞれ供給される。ＮＦ
Ｂ１６−２，１６−３の二次側には、回路ユニット１０
−２，１０−３に対する直流電源の供給の有無を検出す
るリレーＲ２，Ｒ３が接続される。The main power AC 100 is connected to the circuit unit 10-1 via the NFB 16-1 as a power supply disconnection means.
V is branched and supplied. A relay R1 serving as a power supply detection means for detecting the presence or absence of power supply to the circuit unit 10-1 is connected to the secondary side of the NFB 16-1. The main power supply A is connected to the regulator 24-1 via the NFB14.
C100V is branched and supplied, and the DC power from the regulator 24-1 is supplied to the circuit units 10-2 and 10-3 via the NFBs 16-2 and 16-3, respectively. N.F.
A circuit unit 10 is installed on the secondary side of B16-2, 16-3.
Relays R2 and R3 are connected to detect the presence or absence of DC power supply to -2 and 10-3.
【００１３】更にレギュレータ２４−２にはＮＦＢ１６
−４を介して主電源ＡＣ１００Ｖが供給され、レギュレ
ータ２４−２から回路ユニット１０−４に直接直流電源
が供給されている。レギュレータ２４−２の二次側には
回路ユニット１６−４に対する直流電源の供給の有無を
検出するリレーＲ４が接続される。３０は電源異常表示
部であり、リレーＲ０の常開リレー接点ｒｏ、リレーＲ
１〜Ｒ４の常閉リレー接点ｒ１〜ｒ４、フリッカリレー
（ＦＣ）１８とリレー接点ｆｃ、Ａリレー２０と常閉リ
レー接点ａ、及び電源監視灯２２を備える。Furthermore, the regulator 24-2 has an NFB16
A main power supply of 100 V AC is supplied through the regulator 24-2, and DC power is supplied directly to the circuit unit 10-4 from the regulator 24-2. A relay R4 is connected to the secondary side of the regulator 24-2 to detect whether DC power is supplied to the circuit unit 16-4. 30 is a power supply abnormality display section, normally open relay contact ro of relay R0, relay R
1 to R4 normally closed relay contacts r1 to r4, a flicker relay (FC) 18 and a relay contact fc, an A relay 20 and a normally closed relay contact a, and a power monitoring light 22.
【００１４】回路ユニット１６−１〜１６−４に対する
電源供給の有無を検出するリレーＲ１〜Ｒ４のリレー接
点ｒ１〜ｒ４は並列接続され、この負荷としてフリッカ
リレー１８とＡリレー２０を接続している。このため回
路ユニット１６−１〜１６−４に対し正常に電源供給が
行われれば、リレーＲ１〜Ｒ４の作動でリレー接点ｒ１
〜ｒ４は全てオフとなり、フリッカリレー１８及びＡリ
レー２０は非作動状態に置かれる。リレーＲ１〜Ｒ４の
少なくともいずれか１つが電源供給の遮断で非作動にな
ると、対応するリレー接点がオンし、フリッカリレー１
８及びＡリレー２０が作動する。Relay contacts r1 to r4 of relays R1 to R4 that detect the presence or absence of power supply to circuit units 16-1 to 16-4 are connected in parallel, and a flicker relay 18 and an A relay 20 are connected as loads. . Therefore, if power is normally supplied to circuit units 16-1 to 16-4, relay contact r1 is activated by relays R1 to R4.
~r4 are all turned off, and flicker relay 18 and A relay 20 are placed in a non-operating state. When at least one of relays R1 to R4 becomes inoperable due to cutoff of power supply, the corresponding relay contact turns on and flicker relay 1
8 and A relay 20 are activated.
【００１５】フリッカリレー１８のリレー接点ｆｃはＡ
リレー２０のリレー接点ａと並列接続され、一次側にリ
レーＲ０の常開リレー接点ｒｏを接続し、更に負荷とし
て電源監視灯２２を接続している。回路ユニット１６−
１〜１６−４に対する電源供給が全て正常であれば、フ
リッカリレー１８及びＡリレー２０は非作動状態にあり
、リレー接点ｆｃはオフ、またリレー接点ａはオンであ
り、更に主電源のリレーＲ０の作動でリレー接点ｒｏも
オンしているので、電源監視灯２２は点灯している。The relay contact fc of the flicker relay 18 is A
It is connected in parallel with the relay contact a of the relay 20, the normally open relay contact ro of the relay R0 is connected to the primary side, and the power monitoring light 22 is further connected as a load. Circuit unit 16-
If all power supplies to 1 to 16-4 are normal, flicker relay 18 and A relay 20 are inactive, relay contact fc is off, relay contact a is on, and main power relay R0 Since the relay contact ro is also turned on due to the operation of , the power monitoring light 22 is lit.
【００１６】回路ユニット１６−１〜１６−４のいずれ
かの電源供給が遮断されると、フリッカーリレー１８及
びＡリレー２は作動状態となる。このためリレー接点ａ
がオフした状態でフリッカーリレー接点ｆｃが一定周期
でオン、オフを繰り返し、従って電源監視灯２２は点滅
する。更に、主電源ＡＣ１００Ｖが遮断されると、リレ
ーＲ０が復旧してリレー接点ｒｏがオフとなり、電源監
視灯２２は消灯する。これを整理すると次のようになる
。When the power supply to any of the circuit units 16-1 to 16-4 is cut off, the flicker relay 18 and the A relay 2 are activated. Therefore, relay contact a
In the state where is off, the flicker relay contact fc repeats on and off at regular intervals, and the power monitoring light 22 therefore blinks. Further, when the main power source AC100V is cut off, the relay R0 is restored, the relay contact ro is turned off, and the power monitoring light 22 is turned off. If you organize this, it will look like this:
【００１７】（１）全ての回路ユニットが電源が正常の
場合、電源表示灯２２は点灯
（２）いずれかかの回路ユニットの電源が遮断した場合
、電源監視灯２２は点滅
（３）主電源が遮断した場合、電源監視灯２２は消灯次
に具体的に回路ユニット１０−２に電源異常が起きた場
合を例にとって動作を説明する。(1) If the power to all circuit units is normal, the power indicator light 22 lights up. (2) If the power to any circuit unit is cut off, the power monitoring light 22 blinks. (3) The main power supply When the circuit unit 10-2 is cut off, the power monitoring light 22 is turned off.Next, the operation will be specifically explained by taking as an example a case where a power abnormality occurs in the circuit unit 10-2.
【００１８】まず主電源及びユニット電源が全て正常に
供給されている状態にあっては、リレーＲ０，Ｒ１〜Ｒ
４が全て作動し、リレー接点ｒ１〜ｒ４がオフであるか
らフリッカリレー１８及びＡリレー２０は非作動状態に
ある。このためリレー接点ｆｃはオフ、リレー接点ａ及
びｒｏはオンとなり、電源監視灯２２はＮＦＢ１２の一
次側からの電源供給を受けて点灯している。First, when the main power supply and unit power supply are all normally supplied, relays R0, R1 to R
4 are all activated and relay contacts r1 to r4 are off, so the flicker relay 18 and the A relay 20 are in a non-activated state. Therefore, relay contact fc is turned off, relay contacts a and ro are turned on, and power monitoring light 22 is turned on by receiving power from the primary side of NFB 12.
【００１９】この状態で回路ユニット１０−２に対する
ＮＦＢ１６−２が回路ユニット１０−２における一時的
な過電流によりオフしたとすると、リレーＲ２が復旧し
てリレー接点ｒ２がオンし、フリッカリレー１８及びＡ
リレー２０を作動する。このためリレー接点ａがオフす
ると同時に、フリッカーリレー１８の作動でリレー接点
ｆｃがオン、オフし、電源監視灯２２が点滅する。この
電源監視灯２２の点滅から回路ユニット１０−１〜１０
−４に対するＮＦＢ１６−１〜１６−４のいずれかがオ
フになったことがわかり、制御盤の中をあけてＮＦＢ１
６−１〜１６−４の状態を見てＮＦＢ１６−２のオフを
知り、回路ユニット１０−２に対する電源供給を速やか
に回復できる。In this state, if NFB 16-2 for circuit unit 10-2 is turned off due to a temporary overcurrent in circuit unit 10-2, relay R2 is restored, relay contact r2 is turned on, and flicker relay 18 and A
Activate relay 20. Therefore, at the same time that the relay contact a turns off, the flicker relay 18 operates to turn the relay contact fc on and off, causing the power monitoring light 22 to blink. From the blinking of this power monitoring light 22, the circuit units 10-1 to 10
I found that one of NFB16-1 to 16-4 for -4 was turned off, so I opened the control panel and
By checking the states of 6-1 to 16-4 and knowing that the NFB 16-2 is off, the power supply to the circuit unit 10-2 can be quickly restored.
【００２０】勿論、主電源ＡＣ１００ＶがＮＦＢ１２の
オフで遮断されれば、リレーＲ０が非作動状態となり、
リレーｒｏがオフすることで電源監視灯２２は消灯とな
る。尚、上記の実施例は、回路ユニット１０−１〜１０
−４に対する電源断接手段としてＮＦＢ１６−１〜１６
−４を例にとるものであったが、これ以外にスイッチ、
ヒューズ、或いはリレー接点等であってもよい。また電
源監視灯２２に加えてブザー等の音響警報器を設け、回
路ユニットの電源遮断で間欠鳴動、主電源の遮断で連続
鳴動としてもよい。Of course, if the main power supply AC100V is cut off by turning off NFB12, relay R0 becomes inactive,
When relay ro is turned off, power monitoring light 22 is turned off. Note that in the above embodiment, the circuit units 10-1 to 10-1
NFB16-1 to 16 as a power supply disconnection means for -4.
-4 as an example, but in addition to this, there are also switches,
It may be a fuse, a relay contact, or the like. Further, in addition to the power monitoring light 22, an audible alarm such as a buzzer may be provided, and the alarm may sound intermittently when the circuit unit's power is cut off, and may sound continuously when the main power is cut off.
【００２１】[0021]
【発明の効果】以上説明したように本発明によれば、電
源装置の中の回路ユニット毎又は回路ユニットのグルー
プ毎の電源遮断がわかり、回路ユニットの電源遮断によ
る制御盤等の動作異常を速やかに復旧させることができ
る。[Effects of the Invention] As explained above, according to the present invention, it is possible to know whether the power is cut off for each circuit unit or group of circuit units in the power supply device, and to quickly detect malfunctions in the control panel, etc. due to the power cut off of the circuit units. can be restored.
【図１】本発明の一実施例を示した実施例回路図[Fig. 1] Example circuit diagram showing an example of the present invention
１０−１〜１０−４：回路ユニット
１２：主電源用のＮＦＢ
１４：分岐用のＮＦＢ
１６−１〜１６−４：ＮＦＢ（電源供給検出手段）１８
：フリッカリレー
２０：Ａリレー
２２：電源監視灯
２４−１，２４−２：レギュレータ
３０：電源異常表示部
ｒ１〜ｒ４，ａ：常閉リレー接点
ｒｏ：常開リレー接点
ｆｃ：フリッカーリレー接点10-1 to 10-4: Circuit unit 12: NFB for main power supply 14: NFB for branching 16-1 to 16-4: NFB (power supply detection means) 18
: Flicker relay 20: A relay 22: Power monitoring light 24-1, 24-2: Regulator 30: Power abnormality display section r1 to r4, a: Normally closed relay contact ro: Normally open relay contact fc: Flicker relay contact
Claims (2)
ト毎或いは複数の回路ユニットでなるユニットグループ
毎に電源供給を断接するスイッチ、ノンヒューズブレー
カ、ヒューズ又はリレー接点等の電源断接手段を備えた
電源装置に於いて、前記電源断接手段の二次側に設けら
れ回路ユニット側への電源供給の有無を検出する電源供
給検出手段と、該電源供給検出手段の検出出力に基づい
て前記回路ユニット又はユニットグループの電源異常を
表示する電源異常表示手段とを備えたことを特徴とする
電源異常監視装置。Claim 1: A device having a plurality of circuit units, and including a power supply connection/disconnection means such as a switch, a non-fuse breaker, a fuse, or a relay contact for connecting/disconnecting the power supply for each circuit unit or for each unit group consisting of a plurality of circuit units. In the power supply device, the power supply detection means is provided on the secondary side of the power supply connection/disconnection means and detects the presence or absence of power supply to the circuit unit side, and the 1. A power supply abnormality monitoring device comprising: power supply abnormality display means for displaying a power supply abnormality in a circuit unit or unit group.
、前記電源異常表示手段は、前記電源断接手段の二次側
に設けた電源供給検出手段の全てで電源正常が検出され
た場合は電源監視灯を点灯させ、少なくとも１つのユニ
ット電源の異常が検出された場合には前記電源監視灯を
点滅させ、前記電源断接手段の元電源の遮断を検出した
場合には前記電源監視灯を消灯させることを特徴とする
電源異常監視装置。2. The power supply abnormality monitoring device according to claim 1, wherein the power supply abnormality display means detects that the power supply is normal by all of the power supply detection means provided on the secondary side of the power supply disconnection means. If an abnormality in at least one unit power source is detected, the power source monitoring light is turned on, and if a cutoff of the source power source of the power source connection/disconnection means is detected, the power source monitoring light is turned on. A power supply abnormality monitoring device characterized by turning off a light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3006726A JPH04261326A (en) | 1991-01-24 | 1991-01-24 | Power failure monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3006726A JPH04261326A (en) | 1991-01-24 | 1991-01-24 | Power failure monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04261326A true JPH04261326A (en) | 1992-09-17 |
Family
ID=11646253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3006726A Pending JPH04261326A (en) | 1991-01-24 | 1991-01-24 | Power failure monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04261326A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842202A (en) * | 2011-06-23 | 2012-12-26 | 苏州五方光电科技有限公司 | Alarming device of inner circle cutting machine |
| KR20210044151A (en) * | 2019-10-14 | 2021-04-22 | 주식회사 와이이씨 | Remote monitoring device for control circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS584498A (en) * | 1981-06-30 | 1983-01-11 | 京セラミタ株式会社 | Display unit for copying machine |
| JPS62160037A (en) * | 1986-01-07 | 1987-07-16 | 富士通株式会社 | Source control system |
-
1991
- 1991-01-24 JP JP3006726A patent/JPH04261326A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS584498A (en) * | 1981-06-30 | 1983-01-11 | 京セラミタ株式会社 | Display unit for copying machine |
| JPS62160037A (en) * | 1986-01-07 | 1987-07-16 | 富士通株式会社 | Source control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842202A (en) * | 2011-06-23 | 2012-12-26 | 苏州五方光电科技有限公司 | Alarming device of inner circle cutting machine |
| KR20210044151A (en) * | 2019-10-14 | 2021-04-22 | 주식회사 와이이씨 | Remote monitoring device for control circuit |
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