JP3458459B2 - Line terminal equipment - Google Patents
Line terminal equipmentInfo
- Publication number
- JP3458459B2 JP3458459B2 JP15092594A JP15092594A JP3458459B2 JP 3458459 B2 JP3458459 B2 JP 3458459B2 JP 15092594 A JP15092594 A JP 15092594A JP 15092594 A JP15092594 A JP 15092594A JP 3458459 B2 JP3458459 B2 JP 3458459B2
- Authority
- JP
- Japan
- Prior art keywords
- unit
- voltage drop
- line
- battery
- voltage
- 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 - Fee Related
Links
Landscapes
- Alarm Systems (AREA)
- Telephonic Communication Services (AREA)
- Emergency Alarm Devices (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、ガスの流量を監視し異
常があるとガスを遮断するマイクロコンピュータ搭載の
ガスメータ等の電池を電源とする回線端末装置に関する
ものである。
【０００２】
【従来の技術】従来この種の回線端末装置は図２に示す
ように、電話回線１と電話機２及び通信機能付きガスメ
ータ等のデータ端末装置３が接続される。回線端末装置
４は電話機２を電話回線１と接続したり、あるいはノー
リンギング通信時、あるいは、端末発呼時の回線制御を
行う網制御部５と、電話回線１からのアナログ信号をデ
ジタル信号に復調したり、データ端末装置３からのデジ
タル信号をアナログ信号に変調して電話回線１に送る信
号伝送部６と、網制御部５に対する回線接続指示や信号
伝送部６の制御を行う中央制御部７と、回路の電源とな
る電池８と、電池８の電圧レベルの低下を一定周期毎に
チェックして検出する電池電圧低下検出部９と、電池電
圧低下検出部９が電池８の電圧レベルの低下を検出する
と中央制御装置７に対して通報要求を行う通報要求部１
０とから構成されている。そして網制御部５は電話機２
を電話回線１に対して接続したり切り離しをするコイル
リレー１１が主構成要素となる回線切換部１２と、電話
回線１とのインピーダンス整合を行う回線終端部１３で
構成されている。
【０００３】データ端末装置３からの起動電文を受信し
たり、中央制御部７からの定期的なチェックにより電圧
低下検出部９が電圧低下を検出すると通報要求部９から
の通報要求により中央制御部７は、まず回線切換部１２
のコイルリレー１１を制御し、電話機２を電話回線１か
ら切り離す。次に回線終端部１３を制御し回線インピー
ダンスを閉結状態にしてダイヤリングを開始する。ダイ
ヤリング終了後、信号伝送部６を介してガス供給会社等
で各所のデータ端末装置３を集中して監視する中央監視
センターと通信を行う。通信終了後、回線終端部１３の
回線インピーダンス制御を開放にしたのち回線切換部１
２のコイルリレーを元に戻し電話機２を電話回線１に接
続する。
【０００４】このように中央制御部７は網制御部５や信
号伝送部６の制御を行いデータ端末装置３の情報や電池
８の電圧低下情報を中央監視センター等へ電話回線１を
介して送っていた。
【０００５】
【発明が解決しようとする課題】しかしながら、上記の
ような構成では、回線端末装置４の通信回数の頻度が予
想以上に多くなったり、回路の経年変化や故障等で予想
を上まわって回路電流が増大して電池８が早く消耗する
場合がある。電池電圧が低下すると回線端末装置４は電
圧低下を検出して通報しようとするが中央監視装置等の
トラブルやビジー状態（通信回線の飽和状態）により電
池低下通報できない場合、電池低下の通報のリダイヤル
や一般の通信動作は継続して実行される。この状態をそ
のままにして置いたり、あるいは予想以上の電池消耗が
発生していた場合電池電圧が回路の所要動作電圧以下に
なり、通信動作中に動作停止状態になり回線終端部１３
を閉結状態にしたまま、あるいは電話機２を回線から切
り離したままの状態で動作停止してしまうことがあるた
め、ユーザの電話機２が使用ができなくなってしまうと
いう課題があった。
【０００６】本発明は、このような従来の課題を解決す
るもので、電池電圧低下の状態を検出すると中央監視装
置へ通報する機能は電池の残容量を最大限利用して持ち
続け、なおかつユーザの電話機が使用できなくなること
を防止することを目的とする。
【０００７】
【課題を解決するための手段】上記課題を解決するため
に、本発明の回線端末装置は、電源となる電池と、電池
の電圧の低下状態を検出する電圧低下検出部と、電圧低
下検出部からの電圧低下信号により電池低下の通報要求
を出力する通報要求部と、電圧低下検出部よりも電圧低
下判定電圧が低い第２電圧低下検出部と、第２電圧低下
検出部からの電圧低下信号により通常動作を停止すべく
動作停止要求を出力する動作停止要求部と、電話機と電
話回線にと接続・切断を行う回線切替部と電話回線部と
のインピーダンス整合を行う回線終端部とからなる網制
御部と、前記網制御部の動作制御及びデータ端末装置と
の通信を行う中央制御部とからなり、前記中央制御部
は、前記通報要求部からの電池低下の通報要求により、
電池電圧の低下を通報し、前記動作停止要求部からの動
作停止要求により前記電話機と電話回線を接続した状態
を維持するようにしたものである。
【０００８】
【作用】本発明は上記の構成により、電池の電圧が低下
していくと電圧低下検出部で低下を検出する。電圧低下
検出部から通報要求部に低下判定信号が送られる。通報
要求部はこの低下判定信号により中央制御部に通報要求
を行う。通報要求を受け取った中央制御部は動作制御部
を制御して電圧低下の情報を通報する。さらに電圧が低
下すると第２電圧低下検出部で低下を検出する。第２電
圧低下検出部から動作停止要求部に低下判定信号が送ら
れる。動作停止要求部はこの低下判定信号により中央制
御部に動作停止要求を行う。動作停止要求を受け取った
中央制御部は以降通常動作を停止する。
【０００９】
【実施例】以下、本発明の実施例を添付図面にもとづい
て説明する。
【００１０】図１は、本発明の制御装置のブロック構成
図である。図３と同一番号のものは同じ機能を有する構
成要素である。電話回線１、電話機２、データ端末装置
３、回線端末装置４、動作制御部となる網制御部５及び
信号伝送部６と、中央制御部７と、電池８と、電圧低下
検出部９と、通報要求部１０と、電圧低下検出部９より
電圧低下判定電圧が低く、回路の動作電圧よりも高い電
圧で電圧低下を検出する第２電圧低下検出部１４と、第
２電圧低下検出部１４が電圧低下を検出すると中央制御
装置７に対して動作停止要求を行う動作停止要求部１５
とから構成されている。
【００１１】本発明は上記の構成により、データ端末装
置３からの電話番号で構成された起動電文を中央制御部
７が受信すると中央制御部７は、まず回線切換部１２の
コイルリレー１１を制御し、電話機２を電話回線１から
切り離す。次に回線終端部１３を制御し回線インピーダ
ンスを閉結状態にしてダイヤリングを開始する。ダイヤ
リング終了後、信号伝送部６を介してデータ端末装置３
と中央監視センターとの通信を行う。通信終了後、回線
終端部１３の回線インピーダンス制御を開放にしたの
ち、回線切換部１２のコイルリレー１１を元に戻し、電
話機２を電話回線１に接続する。
【００１２】このような通信が行われている中で回線端
末装置４の通信回数の頻度が予想以上に多くなったり、
回路の経年変化や故障等で回路電流が増大して電池８が
早く消耗する場合があるが、このとき電池８の電圧が低
下していくとまず電圧低下検出部９で低下を検出する。
さらに電圧低下検出部９から通報要求部１０に低下判定
信号が送られる。通報要求部１０はこの低下判定信号に
より中央制御部７に通報要求を行う。通報要求を受け取
った中央制御部７は網制御部５を制御し、電圧低下の情
報を通報すべく網制御部５を制御し、中央監視センター
に回線接続をする。中央監視センターに回線接続をした
後は信号伝送部６を介して電圧低下状態を知らせる。
【００１３】さらに電圧が低下すると第２電圧低下検出
部１４で回路動作電圧を下回らない電圧レベルで電圧低
下を検出する。次に第２電圧低下検出部１４は動作停止
要求部１５に低下判定信号を送る。動作停止要求部１５
はこの低下判定信号により中央制御部７に動作停止要求
を行う。動作停止要求を受け取った中央制御部７は以降
通常動作を停止する。したがって電池８の電圧がさらに
低下して回路の動作電圧以下になった状態で通信をする
ことにより網制御部５の回線終端部１３で回線インピー
ダンスを閉結制御したまま、あるいは回線切換部１２で
電話機２を電話回線１から切り離したままの状態で動作
を停止してしまうことがなくなる。
【００１４】
【発明の効果】以上のように本発明の回線端末装置によ
れば、次の効果が得られる。
【００１５】電池の電圧の低下状態を検出する電圧低下
検出レベルを２つ持つことで、一段目の電圧低下検出時
には電圧低下の通報をすることで中央監視センター等に
電圧低下情報を知らせることができる。さらに電池の電
圧が低下し電池電圧が２段目の電圧低下判定を検出する
と以降通常動作を停止することで、ユーザに都合の悪い
状態で回路が動作不能になったり、電圧低下したことを
知らせるため即ユーザに都合の悪い状態にすることを防
止できる。従って電圧低下を検出してから電池の残容量
を最大限利用して通信機能を維持できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line terminal device using a battery such as a gas meter equipped with a microcomputer for monitoring a gas flow rate and shutting off the gas if there is an abnormality. It is about. 2. Description of the Related Art Conventionally, as shown in FIG. 2, a line terminal of this type is connected to a telephone line 1, a telephone 2, and a data terminal 3 such as a gas meter with a communication function. The line terminal device 4 connects the telephone 2 to the telephone line 1, or performs a line control at the time of no ringing communication or at the time of calling a terminal, and demodulates an analog signal from the telephone line 1 into a digital signal. A signal transmission unit 6 for modulating a digital signal from the data terminal device 3 into an analog signal and sending the analog signal to the telephone line 1, and a central control unit 7 for instructing the network control unit 5 to connect to the line and controlling the signal transmission unit 6. A battery 8 serving as a power source of the circuit, a battery voltage drop detecting unit 9 for checking and detecting a drop in the voltage level of the battery 8 at regular intervals, and a battery voltage drop detecting unit 9 which reduces the voltage level of the battery 8. Request unit 1 which issues a report request to the central control unit 7 upon detection of
0. And the network control unit 5 is the telephone 2
A coil relay 11 for connecting / disconnecting the telephone line 1 to / from the telephone line 1 includes a line switching unit 12 as a main component, and a line termination unit 13 for impedance matching with the telephone line 1. When a start-up message is received from the data terminal device 3 or the voltage drop detecting unit 9 detects a voltage drop by a periodic check from the central control unit 7, the central control unit receives a report request from the report request unit 9. 7 is a line switching unit 12
The telephone relay 2 is disconnected from the telephone line 1 by controlling the coil relay 11 of FIG. Next, the line termination unit 13 is controlled to set the line impedance to a closed state, and dialing is started. After the completion of the dialing, communication is performed via a signal transmission unit 6 with a central monitoring center that centrally monitors the data terminal devices 3 at various places in a gas supply company or the like. After the communication is completed, the line impedance control of the line termination unit 13 is released, and then the line switching unit 1
The coil relay of No. 2 is returned to its original position, and the telephone set 2 is connected to the telephone line 1. In this way, the central control unit 7 controls the network control unit 5 and the signal transmission unit 6 and sends information on the data terminal device 3 and information on voltage drop of the battery 8 to the central monitoring center or the like via the telephone line 1. I was [0005] However, in the above configuration, the frequency of the number of times of communication of the line terminal device 4 becomes larger than expected, or the frequency of communication of the line terminal device 4 exceeds the expected value due to aging or failure of the circuit. As a result, the circuit current may increase and the battery 8 may be quickly consumed. When the battery voltage drops, the line terminal device 4 attempts to detect and report the voltage drop. However, if the battery drop cannot be reported due to a trouble of the central monitoring device or a busy state (saturation state of the communication line), the redial of the battery drop report. And general communication operations are continuously executed. If this state is left as it is, or if the battery is consumed more than expected, the battery voltage becomes lower than the required operating voltage of the circuit, the operation is stopped during the communication operation, and the line termination unit 13 is stopped.
In some cases, the operation of the telephone 2 may be stopped while the telephone 2 is closed or the telephone 2 is disconnected from the line, so that the user's telephone 2 cannot be used. The present invention solves such a conventional problem. When the state of low battery voltage is detected, the function of notifying the central monitoring device continues to use the remaining capacity of the battery as much as possible. It is an object of the present invention to prevent a telephone from becoming unusable. [0007] In order to solve the above problems, a line terminal device according to the present invention comprises a battery serving as a power supply, a voltage drop detecting unit for detecting a voltage drop state of the battery, and a voltage drop detecting unit. A notification request unit that outputs a notification request for a battery drop in response to a voltage drop signal from the drop detection unit, a second voltage drop detection unit having a voltage drop determination voltage lower than the voltage drop detection unit, and a second voltage drop detection unit. and operation stop request section for outputting an operation stop request to stop the normal operation the voltage drop signal, the telephone and electric
Line switching unit for connecting / disconnecting to / from telephone line and telephone line unit
Control consisting of a line terminator for impedance matching
Control unit, operation control and data terminal device of the network control unit,
A central control unit for performing communication of the central control unit.
Is a low battery notification request from the notification request unit,
Notification of a drop in battery voltage, and operation from the operation stop request unit
A state in which the telephone and the telephone line are connected by an operation stop request
Is to be maintained . According to the present invention, as described above, when the voltage of the battery decreases, the voltage decrease detecting unit detects the decrease. A voltage drop detection signal is sent from the voltage drop detection unit to the notification request unit. The report request unit issues a report request to the central control unit based on the decrease determination signal. The central control unit that has received the report request controls the operation control unit to report the information of the voltage drop. When the voltage further drops, the second voltage drop detector detects the drop. A drop determination signal is sent from the second voltage drop detection unit to the operation stop request unit. The operation stop request unit issues an operation stop request to the central control unit based on the decrease determination signal. After receiving the operation stop request, the central control unit stops the normal operation thereafter. An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a control device according to the present invention. Components having the same numbers as those in FIG. 3 are components having the same functions. A telephone line 1, a telephone 2, a data terminal device 3, a line terminal device 4, a network control unit 5 and a signal transmission unit 6 serving as an operation control unit, a central control unit 7, a battery 8, a voltage drop detection unit 9, The notification request unit 10, a second voltage drop detection unit 14 that detects a voltage drop with a voltage lower than the voltage drop detection unit 9 and higher than the operation voltage of the circuit, and a second voltage drop detection unit 14. An operation stop request unit 15 that issues an operation stop request to the central control unit 7 upon detecting a voltage drop.
It is composed of According to the present invention, when the central control unit 7 receives an activation message composed of a telephone number from the data terminal device 3, the central control unit 7 first controls the coil relay 11 of the line switching unit 12. Then, the telephone 2 is disconnected from the telephone line 1. Next, the line termination unit 13 is controlled to set the line impedance to a closed state, and dialing is started. After completion of the dialing, the data terminal device 3
And communicate with the central monitoring center. After the communication is completed, the line impedance control of the line termination unit 13 is released, and then the coil relay 11 of the line switching unit 12 is returned to the original state, and the telephone 2 is connected to the telephone line 1. While such communication is being performed, the frequency of the number of times of communication of the line terminal device 4 becomes larger than expected,
There is a case where the circuit current increases due to the aging or failure of the circuit and the battery 8 is quickly consumed. At this time, when the voltage of the battery 8 decreases, the voltage decrease detecting unit 9 first detects the decrease.
Further, a voltage drop detection signal is sent from the voltage drop detection section 9 to the notification request section 10. The report request unit 10 makes a report request to the central control unit 7 based on the decrease determination signal. Upon receiving the report request, the central control unit 7 controls the network control unit 5, controls the network control unit 5 to report the information of the voltage drop, and connects the line to the central monitoring center. After the line connection to the central monitoring center, the state of the voltage drop is notified via the signal transmission unit 6. When the voltage further drops, the second voltage drop detector 14 detects a voltage drop at a voltage level that does not fall below the circuit operating voltage. Next, the second voltage drop detection unit 14 sends a drop determination signal to the operation stop request unit 15. Operation stop request unit 15
Sends an operation stop request to the central control unit 7 based on the decrease determination signal. Upon receiving the operation stop request, the central control unit 7 stops the normal operation thereafter. Therefore, the communication is performed in a state where the voltage of the battery 8 is further reduced to become equal to or lower than the operating voltage of the circuit, thereby keeping the line impedance closed and controlled by the line termination unit 13 of the network control unit 5 or by the line switching unit 12. The operation does not stop when the telephone 2 is disconnected from the telephone line 1. According to the line terminal device of the present invention, the following effects can be obtained. By having two voltage drop detection levels for detecting a voltage drop state of the battery, it is possible to notify the central monitoring center or the like of the voltage drop information by notifying the voltage drop when the first voltage drop is detected. it can. Further, when the battery voltage drops and the battery voltage detects the second-stage voltage drop determination, the normal operation is stopped thereafter to notify the user that the circuit has become inoperable in an inconvenient state or that the voltage has dropped. Therefore, it is possible to prevent the user from immediately entering a state that is inconvenient. Therefore, the communication function can be maintained by using the remaining capacity of the battery as much as possible after detecting the voltage drop.
【図面の簡単な説明】
【図１】本発明の実施例における制御装置のブロック構
成図
【図２】従来の制御装置のブロック構成図
【符号の説明】２ 電話機 ３ データ端末装置
５ 網制御部
７ 中央制御部
８ 電池
９ 電池電圧低下検出部
１０ 通報要求部１２ 回線切替部 １３ 回線終端部
１４ 第２電池電圧低下検出部
１５ 動作停止要求部Block diagram of a control apparatus in Embodiment BRIEF DESCRIPTION OF THE DRAWINGS [Figure 1] The present invention FIG. 2 is a block diagram of a conventional control device [Description of Reference Numerals] 2 telephone 3 data terminal device 5 network controller 7 Central control unit 8 Battery 9 Battery voltage drop detection unit 10 Report request unit 12 Line switching unit 13 Line termination unit 14 Second battery voltage drop detection unit 15 Operation stop request unit
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G08B 19/00 - 31/00 H04M 11/04 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 7 , DB name) G08B 19/00-31/00 H04M 11/04
Claims (1)
下状態を検出する電圧低下検出部と、前記電圧低下検出
部からの電圧低下信号により電池低下の通報要求を出力
する通報要求部と、前記電圧低下検出部よりも電圧低下
判定電圧が低い第２電圧低下検出部と、前記第２電圧低
下検出部からの電圧低下信号により通常動作を停止すべ
く動作停止要求を出力する動作停止要求部と、電話機と
電話回線にと接続・切断を行う回線切替部と電話回線部
とのインピーダンス整合を行う回線終端部とからなる網
制御部と、前記網制御部の動作制御及びデータ端末装置
との通信を行う中央制御部とからなり、前記中央制御部
は、前記通報要求部からの電池低下の通報要求により、
電池電圧の低下を通報し、前記動作停止要求部からの動
作停止要求により前記電話機と電話回線を接続した状態
を維持するようにした回線端末装置。 (57) [Claim 1] A battery as a power supply, a voltage drop detecting unit for detecting a voltage drop state of the battery, and a battery drop signal from the voltage drop detecting unit. A notification request unit that outputs a notification request, a second voltage drop detection unit having a voltage drop determination voltage lower than the voltage drop detection unit, and a normal operation stopped by a voltage drop signal from the second voltage drop detection unit. An operation stop request unit that outputs an operation stop request ;
Line switching unit for connecting / disconnecting to telephone line and telephone line unit
Network consisting of a line termination that performs impedance matching with
Control unit, operation control of said network control unit and data terminal device
A central control unit for communicating with the central control unit.
Is a low battery notification request from the notification request unit,
Notification of a drop in battery voltage, and operation from the operation stop request unit
A state in which the telephone and the telephone line are connected by an operation stop request
Line terminal device that is designed to maintain
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15092594A JP3458459B2 (en) | 1994-07-01 | 1994-07-01 | Line terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15092594A JP3458459B2 (en) | 1994-07-01 | 1994-07-01 | Line terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0816957A JPH0816957A (en) | 1996-01-19 |
| JP3458459B2 true JP3458459B2 (en) | 2003-10-20 |
Family
ID=15507411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15092594A Expired - Fee Related JP3458459B2 (en) | 1994-07-01 | 1994-07-01 | Line terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3458459B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003088174A1 (en) * | 2002-04-15 | 2003-10-23 | Matsushita Electric Industrial Co., Ltd. | Monitor system |
-
1994
- 1994-07-01 JP JP15092594A patent/JP3458459B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0816957A (en) | 1996-01-19 |
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