JPH0996553A - Water service meter - Google Patents
Water service meterInfo
- Publication number
- JPH0996553A JPH0996553A JP7252220A JP25222095A JPH0996553A JP H0996553 A JPH0996553 A JP H0996553A JP 7252220 A JP7252220 A JP 7252220A JP 25222095 A JP25222095 A JP 25222095A JP H0996553 A JPH0996553 A JP H0996553A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- circuit
- communication
- flow rate
- microcomputer
- 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.)
- Granted
Links
Landscapes
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は水道メータに関す
る。TECHNICAL FIELD The present invention relates to a water meter.
【０００２】[0002]
【従来の技術】寒冷地においては、水道メータの凍結防
止対策として、水道メータが地中深く埋設されている。
そのため検針を容易にするため隔測検針システムが採用
されている。2. Description of the Related Art In cold regions, water meters are buried deep in the ground as measures to prevent freezing of the water meters.
Therefore, a remote meter reading system is adopted to facilitate the meter reading.
【０００３】この種の隔測検針システムとしては、特公
平５−５６８１１号公報記載のようにいわゆる発電式水
道メータと、この発電式水道メータから離れた場所に設
置されている受信器とを電線で接続したシステムが公知
である。As a remote sensing system of this kind, a so-called power generation type water meter and a receiver installed at a place distant from this power generation type water meter are disclosed in Japanese Patent Publication No. 5-56811. Connected systems are known.
【０００４】この隔測検針システムは、計量部の駆動磁
石の回転を磁気結合で伝達する従動磁石と、この従動磁
石の回転を減速する歯輪列と、この歯輪列中の歯車軸に
取り付けられた切り欠き歯車と該歯車軸と隣接する歯車
軸に遊合されたクラッチ歯車と、ぜんまい軸・該軸に取
り付けられた香箱、歯輪列の歯車と係合する前記香箱と
で構成される間欠送り機構と、この間欠送り機構により
間欠駆動されて単位流量パルスを発生する発電機とを有
する発信器と、この発信器の発電機のコイルに２本の電
線で接続され、発信器と離れた場所に設置される受信器
とからなる隔測検針システムであって、前記従動磁石の
回転を検出するセンサと、このセンサの電気信号を受
け、この信号を従動磁石の１回転に対し複数個のパルス
に整形し、このパルスが決められた時間の間に２パルス
入ったことを判断して、逆接続信号を出すチェッカを設
けている。This remote sensing needle system is attached to a driven magnet for transmitting the rotation of the drive magnet of the measuring section by magnetic coupling, a gear train for reducing the rotation of the driven magnet, and a gear shaft in the gear train. An intermittent gear constituted by a notched gear, a clutch gear loosely engaged with a gear shaft adjacent to the gear shaft, a mainspring shaft, a barrel barrel attached to the shaft, and the barrel barrel engaging with a gear of a gear train. A transmitter having a feed mechanism and a generator that is intermittently driven by the intermittent feed mechanism to generate a unit flow rate pulse, and is connected to the coil of the generator of the transmitter by two electric wires, and is separated from the transmitter. A remote sensing needle system comprising a receiver installed at a location, wherein a sensor for detecting rotation of the driven magnet and an electric signal from the sensor are received, and the signal is supplied to a plurality of pulses for one rotation of the driven magnet. Shaped into this pal It determines that it has entered two pulses during the time that is determined, is provided with a checker issuing reverse connection signal.
【０００５】こうして、前記電気信号の波形を判断する
チェッカを設けて、メータの出入口逆接続の発見をメー
タを掘り起こすことなく短時間で確認する。発電式水道
メータと受信器とは合計３本の電線で接続され、該３本
の電線の内第１と第２の電線の２本で前記発信器の発電
機のコイルと受信器のパルスモータのコイルとを接続し
ていて、水道メータが一定の水量を計量する毎にこれら
２本の電線で単位流量パルスを伝達して受信器のパルス
モータをその都度歩進させ、表示用数字車を回転させ
る。In this way, a checker for determining the waveform of the electric signal is provided to confirm the discovery of the reverse connection of the meter inlet and outlet in a short time without digging up the meter. The generator-type water meter and the receiver are connected by a total of three electric wires, and the generator coil of the transmitter and the pulse motor of the receiver are connected by the first and second electric wires of the three electric wires. Each time the water meter measures a certain amount of water, the unit meter pulse is transmitted by these two electric wires, and the pulse motor of the receiver is stepped up each time. Rotate.
【０００６】表示車は積算流量をｍ3 単位で表示する。
前記３本の電線の内第２と第３の電線の２本で、前記セ
ンサの電気信号を受信器の２個の端子に伝達し、この端
子に接続されたチェッカで電気信号の波形を判断して、
水道メータの出入口が逆接続であることを発見するよう
になっている。The display wheel displays the integrated flow rate in m 3 units.
The second and third wires of the three wires transmit the electric signal of the sensor to the two terminals of the receiver, and the checker connected to these terminals determines the waveform of the electric signal. do it,
It is designed to discover that the entrances and exits of water meters are reverse connected.
【０００７】[0007]
【発明が解決しようとする課題】前記従来の技術では、
パルスモータ式の受信器を駆動することはできても、電
話回線等を介してのいわゆる自動検針を行なうことがで
きないという問題点があった。SUMMARY OF THE INVENTION In the above conventional technique,
Although the pulse motor type receiver can be driven, there is a problem that so-called automatic meter reading cannot be performed via a telephone line or the like.
【０００８】そこで、本発明では、前記従来技術で使用
されている３本の電線を活用して、隔測検針と自動検針
ができる水道メータを提供することを目的とする。Therefore, it is an object of the present invention to provide a water meter capable of remote metering and automatic metering utilizing the three electric wires used in the prior art.
【０００９】[0009]
【課題を解決するための手段】前記目的を達成するため
に、請求項１の発明は、計量部（４）で計量した流量を
電気信号に変換するセンサ（５）と、該センサ（５）の
電気信号を流量パルスとして読み取る流量パルス入力回
路（６）と、その流量パルスを演算・記憶するマイクロ
コンピュータ（７）と、マイクロコンピュータ（７）で
演算した積算流量の一定値ごとに極性の異なる電圧パル
スを交互に出力するパルス出力回路（８）と、水使用量
・漏水・逆流検知等の各種データをやりとりする通信Ｉ
／Ｏ回路（９）と、これらに電力を供給する電池（１
０）とを具備するとともに、電圧パルスと各種データの
伝送を３線で行なうことを特徴とする水道メータであ
る。In order to achieve the above-mentioned object, the invention of claim 1 provides a sensor (5) for converting a flow rate measured by a measuring section (4) into an electric signal, and the sensor (5). Flow pulse input circuit (6) for reading the electric signal of as a flow rate pulse, a microcomputer (7) for calculating and storing the flow rate pulse, and a polarity different for each constant value of the integrated flow rate calculated by the microcomputer (7). Communication I for exchanging various data such as water consumption, water leakage, and backflow detection with a pulse output circuit (8) that alternately outputs voltage pulses
/ O circuit (9) and a battery (1
0), and a voltage meter and various data are transmitted by three wires.
【００１０】請求項２の発明は、請求項１の水道メータ
において、３線を構成する第１，第２，第３の電線（１
１）（１２）（１３）のうち、第１と第２の電線（１
１）（１２）が電圧パルスの伝送に用いられて、パルス
モータ式受信器（１５）のパルスモータ（１６）のコイ
ル（１７）に接続され、第２，第３の電線（１２）（１
３）が自動検針用の端末網制御装置に接続されることを
特徴とするものである。According to a second aspect of the present invention, in the water meter according to the first aspect, first, second and third electric wires (1
1) (12) (13) of the first and second electric wire (1
1) and 12) are used for transmission of voltage pulses and are connected to the coil (17) of the pulse motor (16) of the pulse motor type receiver (15), and the second and third electric wires (12) (1)
3) is connected to a terminal network control device for automatic meter reading.
【００１１】請求項３の発明は、請求項２の水道メータ
において、パルス出力回路（８）と、通信Ｉ／Ｏ回路
（９）をマイクロコンピュータ（７）によって制御し、
一連の通信中は電圧パルスを出力せずマイクロコンピュ
ータ（７）に溜め込み、通信終了後に出力するととも
に、電圧パルス出力中の通信はパルス出力が終了した後
に送信することを特徴とするものである。According to a third aspect of the present invention, in the water meter of the second aspect, the pulse output circuit (8) and the communication I / O circuit (9) are controlled by the microcomputer (7),
During the series of communication, the voltage pulse is not output and is stored in the microcomputer (7) and is output after the communication is finished. The communication during the voltage pulse output is transmitted after the pulse output is finished.
【００１２】そして、請求項４の発明は、請求項３又は
４の水道メータにおいて、パルス出力回路（８）からの
電圧パルスの伝送に先立って第１と第２の電線間の短絡
を検出して、短絡時は電圧パルスの伝送を行わないこと
を特徴とするものである。The invention according to claim 4 is the water meter according to claim 3 or 4, wherein a short circuit between the first and second electric wires is detected prior to transmission of the voltage pulse from the pulse output circuit (8). In the short circuit, the voltage pulse is not transmitted.
【００１３】[0013]
【発明の実施の形態】図１は本発明の実施例のブロック
図、図２はその要部回路図、図３はタイミング図であ
る。1 is a block diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of its main portion, and FIG. 3 is a timing diagram.
【００１４】図中１は水道メータの発信器で、マグネッ
ト３の回転を検出して電気信号に変換する磁気センサ５
と、該センサ５の電気信号を流量パルスとして読み取る
流量パルス入力回路６と、その流量パルスを演算・記憶
するマイクロコンピュータ７と、マイクロコンピュータ
７で演算した積算流量の一定値ごとに極性の異なる電圧
パルスを交互に出力するパルス出力回路８と、水使用量
・漏水・逆流検知等の各種データを電話回路網を通じて
やり取りする通信Ｉ／Ｏ回路９と、これらに電力を供給
する電池１０とを備え、電圧パルスと各種データの伝送
を第１，第２，第３の電線１１，１２，１３を有する伝
送コード１４を介して行なう。４は羽根車２と羽根車２
の回転軸の上部に取り付けたマグネット３を有する計量
部である。In the figure, reference numeral 1 is a transmitter of a water meter, which is a magnetic sensor 5 for detecting rotation of a magnet 3 and converting it into an electric signal.
A flow rate pulse input circuit 6 for reading an electric signal of the sensor 5 as a flow rate pulse, a microcomputer 7 for calculating and storing the flow rate pulse, and a voltage having a polarity different for each constant value of the integrated flow rate calculated by the microcomputer 7. A pulse output circuit 8 for alternately outputting pulses, a communication I / O circuit 9 for exchanging various data such as water usage, water leakage, and backflow detection through a telephone network, and a battery 10 for supplying power to these are provided. , The voltage pulse and various data are transmitted through the transmission cord 14 having the first, second, and third electric wires 11, 12, 13. 4 is impeller 2 and impeller 2
It is a weighing unit having a magnet 3 attached to the upper part of the rotating shaft.
【００１５】１５は公知のパルスモータ式受信器で、水
道メータから離れた位置に設置され、そのパルスモータ
１６のコイル１７は第１と第２の電線１１，１２によっ
て前記パルス出力回路８に接続されている。Reference numeral 15 is a known pulse motor type receiver, which is installed at a position apart from the water meter, and the coil 17 of the pulse motor 16 is connected to the pulse output circuit 8 by the first and second electric wires 11 and 12. Has been done.
【００１６】１８はパルスモータ１６に連動する数字車
である。パルス出力回路８は水の一定量ごとに一定のパ
ルス幅、例えば５８．５ｍｓ以下のパルス幅の電圧パル
スで極性の違うパルスを交互に出力して、その都度パル
スモータ１６を歩進させて数字車１８を単位流量、例え
ば〔ｍ3 〕ずつ歩進させる。Reference numeral 18 is a numeral wheel which is interlocked with the pulse motor 16. The pulse output circuit 8 alternately outputs a pulse having a constant pulse width for each fixed amount of water, for example, a voltage pulse having a pulse width of 58.5 ms or less, which has different polarities. The car 18 is stepped by a unit flow rate, for example, [m 3 ].
【００１７】なお、第２，第３の電線１２，１３は自動
検針用の端末網制御装置を介して電話回線に接続され
る。図２において、７は前記マイクロコンピュータ、Ｔ
１〜Ｔ５はトランジスタで抵抗Ｒ１〜Ｒ６とで前記パル
ス出力回路８を構成する。The second and third electric wires 12 and 13 are connected to a telephone line via a terminal network control device for automatic meter reading. In FIG. 2, 7 is the microcomputer, T
Transistors 1 to T5 form the pulse output circuit 8 with resistors R1 to R6.
【００１８】Ｔ６，Ｔ７はトランジスタで抵抗Ｒ７〜Ｒ
１０とで前記通信Ｉ／Ｏ回路を構成する。Ｄは発光ダイ
オード、Ｔ８はフォトトランジスタで端末網制御装置の
インタフェースを構成している。T6 and T7 are transistors and resistors R7 to R
The communication I / O circuit is constituted by 10 and. D is a light emitting diode and T8 is a phototransistor, which constitutes an interface of the terminal network controller.
【００１９】水道メータが一定の流量を計量すると、マ
イクロコンピュータ７がトランジスタＴ２とＴ５をオン
して、第１と第２の電線１１，１２を介して受信器のパ
ルスモータに電圧パルスを伝送し、コイル１７に矢印方
向の電流を流してパルスモータを歩進させる。このとき
の電圧パルスのパルス幅は図３に示すように５８．５ｍ
ｓ以下に定めてある。When the water meter measures a constant flow rate, the microcomputer 7 turns on the transistors T2 and T5 and transmits a voltage pulse to the pulse motor of the receiver via the first and second electric wires 11 and 12. , A current in the direction of the arrow is passed through the coil 17 to step the pulse motor. The pulse width of the voltage pulse at this time is 58.5 m as shown in FIG.
s or less.
【００２０】水道メータが更に一定の流量を計量する
と、マイクロコンピュータ７はトランジスタＴ３とＴ４
をオンして、前記パルス幅の電圧パルスを第１と第２の
電線１１，１２を介して受信器のパルスモータに伝達
し、コイル１７に矢印と逆方向の電流を流してパルスモ
ータを歩進させる。When the water meter further measures a constant flow rate, the microcomputer 7 causes the transistors T3 and T4 to operate.
Is turned on to transmit the voltage pulse having the pulse width to the pulse motor of the receiver through the first and second electric wires 11 and 12, and the coil 17 is supplied with a current in the direction opposite to the arrow to move the pulse motor. Advance.
【００２１】なお、上述のようにパルス出力を送出する
ときに、第１と第２の電線同士が短絡している場合に
は、前記電池１０が短絡して回路が機能しなくなってし
まう。そこで、上述のパルス出力を送出する前に、必ず
次のチェック動作を行なう。When the pulse output is sent as described above, if the first and second electric wires are short-circuited, the battery 10 is short-circuited and the circuit fails. Therefore, the following check operation is always performed before sending the above pulse output.
【００２２】即ち、トランジスタＴ１とＴ５をオンにし
てＡ点の電圧を確認し、Ａ点の電圧レベルが“Ｌ”なら
ば短絡と判断して前記パルス出力の送出動作を行なわな
い。Ａ点のレベルはパルスモータのコイル１７の正常時
の抵抗値と抵抗Ｒ２との分圧比を考え、短絡していない
正常時にはＡ点のレベルが“Ｈ”レベルになるように抵
抗Ｒ２の値を定めてある。That is, the transistors T1 and T5 are turned on and the voltage at the point A is confirmed. If the voltage level at the point A is "L", it is judged that a short circuit has occurred and the pulse output sending operation is not performed. Considering the voltage division ratio between the resistance value of the coil 17 of the pulse motor when the coil 17 is normal and the resistance R2, the value of the resistance R2 is set so that the level of the point A becomes "H" level when not short-circuited. Has been set.
【００２３】なお、パルス出力中は次に述べる通信をし
ないようにマイクロコンピュータ７のプログラムが定め
てある。次に通信Ｉ／Ｏ回路９による通信動作について
説明する。Note that the program of the microcomputer 7 is set so that the following communication is not performed during pulse output. Next, the communication operation by the communication I / O circuit 9 will be described.
【００２４】水道メータから端末網制御装置を介しての
検針センタへの送信時は、トランジスタＴ７をオンした
状態のままで、トランジスタＴ６をオン・オフして送信
の制御を行なう。こうして第２，第３の電線１２，１３
を介して伝送データを端末網制御装置のインタフェース
を構成するダイオードＤとフォトトランジスタＴ８へ伝
送する。During transmission from the water meter to the meter-reading center via the terminal network controller, the transistor T6 is turned on / off while the transistor T7 is kept on to control the transmission. Thus, the second and third electric wires 12, 13
The transmission data is transmitted to the diode D and the phototransistor T8 which form the interface of the terminal network control device via the.
【００２５】受信時はマイクロコンピュータ７のポート
ｈを“Ｈ”、ポートｉを“Ｌ”レベルにしてトランジス
タＴ８のオン・オフをＢ点のレベルで読み取る。なお、
通信中はパルス出力をしないようにマイコンのプログラ
ムを定めてある。At the time of reception, the port h of the microcomputer 7 is set to "H" and the port i is set to "L" level to read the on / off state of the transistor T8 at the level of point B. In addition,
The microcomputer program is set so that pulse output is not performed during communication.
【００２６】図３は上記実施例のタイミング図で、Ｐ
１，Ｐ２，Ｐ３は受信電文のマークが入ってきたかどう
かをみるためのサンプリングパルスで、パルス幅４ｍｓ
の後縁の立下り時点でサンプリングする。サンプリング
間隔は６２．５ｍｓに定めてある。FIG. 3 is a timing chart of the above embodiment, where P
1, P2, P3 are sampling pulses for checking whether the mark of the received telegram has come in, and the pulse width is 4 ms.
Sampling at the trailing edge of the trailing edge. The sampling interval is set to 62.5 ms.
【００２７】受信電文のマーク長は１５０〜２５０ｍｓ
に定めてある。なお、自動検針用通信線１２，１３と、
パルス出力用電線１１，１２間の信号の干渉を防止する
ために、次のようにしている。The mark length of the received message is 150 to 250 ms.
Stipulated in. In addition, communication lines 12 and 13 for automatic meter reading,
In order to prevent signal interference between the pulse output electric wires 11 and 12, the following is done.
【００２８】（１）通信中の電圧パルス出力 マイクロコンピュータ７の制御で一連の通信中は電圧パ
ルスを出力せず、内部に溜め込んで、通信終了後に出力
する。(1) Voltage pulse output during communication Under the control of the microcomputer 7, a voltage pulse is not output during a series of communication but is stored inside and output after the communication is completed.
【００２９】（２）電圧パルス出力中の通信 電圧パルス出力中の送信は、パルス出力が終了した後に
行なうようにマイクロコンピュータ７で制御する。(2) Communication during voltage pulse output The microcomputer 7 controls the transmission during the voltage pulse output so that the transmission is performed after the pulse output is completed.
【００３０】電圧パルス出力中の受信は電圧パルスのパ
ルス幅を短くすることで対応している。実際には、受信
電文のマーク長は１５０〜２５０ｍｓと決められ、かつ
サンプリング周期は６２．５ｍｓであるため、前述のよ
うに電圧パルスのパルス幅を５８．５ｍｓ以下にするこ
とで、電圧パルス出力中の受信電文を受けることができ
る（図３参照）。Reception during voltage pulse output is handled by shortening the pulse width of the voltage pulse. In practice, the mark length of the received message is determined to be 150 to 250 ms, and the sampling period is 62.5 ms. Therefore, by setting the pulse width of the voltage pulse to 58.5 ms or less as described above, the voltage pulse output It is possible to receive the received telegram (see FIG. 3).
【００３１】[0031]
【発明の効果】本発明の水道メータは上述のように構成
されているので、従来の発電式隔測メータに用いられて
いた３本の電線からなる伝送ケーブルを活用でき、しか
も、メータにマイクロコンピュータを搭載したため、自
動検針対応の面で将来性がある。Since the water meter of the present invention is constructed as described above, it is possible to utilize the transmission cable consisting of three electric wires used in the conventional power generation type remote measuring meter, and the microcomputer can be used as the meter. Since it is equipped with, there is a future in terms of automatic meter reading.
【００３２】また、既設の３本の電線からなる伝送ケー
ブルを活用できるため、伝送ケーブルの設置に追加費用
を要しない利点がある。また、請求項４の発明では、パ
ルス出力回路に接続された電線やコイルの短絡による電
池の消耗を未然に防止できる。Moreover, since the existing transmission cable consisting of three electric wires can be utilized, there is an advantage that no additional cost is required for installing the transmission cable. Further, according to the invention of claim 4, it is possible to prevent the consumption of the battery due to the short circuit of the electric wire or the coil connected to the pulse output circuit.
【図１】本発明の実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】図１の実施例の要部回路図である。FIG. 2 is a circuit diagram of a main part of the embodiment of FIG.
【図３】本発明の実施例のタイミング図である。FIG. 3 is a timing diagram of an embodiment of the present invention.
１ 水道メータの発信器 ２ 羽根車 ３ マグネット ４ 計量部 ５ 磁気センサ（センサ） ６ 流量パルス入力回路 ７ マイクロコンピュータ ８ パルス出力回路 ９ 通信Ｉ／Ｏ回路 １０ リチウム電池 １１，１２，１３ 電線 １４ 伝送コード １５ 受信器 １６ パルスモータ １７ コイル 1 Water Meter Transmitter 2 Impeller 3 Magnet 4 Measuring Section 5 Magnetic Sensor (Sensor) 6 Flow Rate Pulse Input Circuit 7 Microcomputer 8 Pulse Output Circuit 9 Communication I / O Circuit 10 Lithium Battery 11, 12, 13 Electric Wire 14 Transmission Code 15 Receiver 16 Pulse motor 17 Coil
Claims (4)
に変換するセンサ（５）と、該センサ（５）の電気信号
を流量パルスとして読み取る流量パルス入力回路（６）
と、その流量パルスを演算・記憶するマイクロコンピュ
ータ（７）と、マイクロコンピュータ（７）で演算した
積算流量の一定値ごとに極性の異なる電圧パルスを交互
に出力するパルス出力回路（８）と、水使用量・漏水・
逆流検知等の各種データをやりとりする通信Ｉ／Ｏ回路
（９）と、これらに電力を供給する電池（１０）とを具
備するとともに、電圧パルスと各種データの伝送を３線
で行なうことを特徴とする水道メータ。1. A sensor (5) for converting a flow rate measured by a measuring unit (4) into an electric signal, and a flow rate pulse input circuit (6) for reading the electric signal of the sensor (5) as a flow rate pulse.
A microcomputer (7) for calculating and storing the flow rate pulse, and a pulse output circuit (8) for alternately outputting voltage pulses having different polarities for each constant value of the integrated flow rate calculated by the microcomputer (7), Water usage / leakage /
A communication I / O circuit (9) for exchanging various data such as backflow detection and a battery (10) for supplying electric power to these are provided, and voltage pulses and various data are transmitted by three wires. And a water meter.
（１１）（１２）（１３）のうち、第１と第２の電線
（１１）（１２）が電圧パルスの伝送に用いられて、パ
ルスモータ式受信器（１５）のパルスモータ（１６）の
コイル（１７）に接続され、第２，第３の電線（１２）
（１３）が自動検針用の端末網制御装置に接続されるこ
とを特徴とする請求項１記載の水道メータ。2. The first and second electric wires (11), (12) among the first, second, and third electric wires (11), (12), (13) constituting the three wires are used to transmit voltage pulses. Is used for connecting to the coil (17) of the pulse motor (16) of the pulse motor type receiver (15), and the second and third electric wires (12)
The water meter according to claim 1, wherein (13) is connected to a terminal network control device for automatic meter reading.
路（９）をマイクロコンピュータ（７）によって制御
し、一連の通信中は電圧パルスを出力せずマイクロコン
ピュータ（７）に溜め込み、通信終了後に出力するとと
もに、電圧パルス出力中の通信はパルス出力が終了した
後に送信することを特徴とする請求項２記載の水道メー
タ。3. A pulse output circuit (8) and a communication I / O circuit (9) are controlled by a microcomputer (7), and voltage pulses are not output during a series of communication and are stored in the microcomputer (7). The water meter according to claim 2, wherein the water meter is output after the communication is completed, and the communication during the voltage pulse output is transmitted after the completion of the pulse output.
の伝送に先立って第１と第２の電線間の短絡を検出し
て、短絡時は電圧パルスの伝送を行なわないことを特徴
とする請求項２又は３記載の水道メータ。4. A short circuit between the first and second electric wires is detected prior to the transmission of the voltage pulse from the pulse output circuit (8), and the voltage pulse is not transmitted during the short circuit. The water meter according to claim 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25222095A JP3682326B2 (en) | 1995-09-29 | 1995-09-29 | Water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25222095A JP3682326B2 (en) | 1995-09-29 | 1995-09-29 | Water meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0996553A true JPH0996553A (en) | 1997-04-08 |
| JP3682326B2 JP3682326B2 (en) | 2005-08-10 |
Family
ID=17234188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25222095A Expired - Fee Related JP3682326B2 (en) | 1995-09-29 | 1995-09-29 | Water meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3682326B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000018107A (en) * | 2000-01-12 | 2000-04-06 | 황을중 | Water saving device of shower bath using micom |
| KR100457454B1 (en) * | 2001-08-29 | 2004-11-17 | 신민철 | Digital flow meter |
| KR100528022B1 (en) * | 1998-06-30 | 2006-02-03 | 서창전기통신 주식회사 | Meter using magnetoresistive element |
| JP2012521504A (en) * | 2009-03-24 | 2012-09-13 | ヴェオリア オ − コンパニ ジェネラル デ ゾ | Equipment and methods for water quality monitoring in drinking water networks |
| CN112461317A (en) * | 2019-09-06 | 2021-03-09 | 北京亚华意诺斯新能源科技有限公司 | Simple driving system and instrument |
-
1995
- 1995-09-29 JP JP25222095A patent/JP3682326B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100528022B1 (en) * | 1998-06-30 | 2006-02-03 | 서창전기통신 주식회사 | Meter using magnetoresistive element |
| KR20000018107A (en) * | 2000-01-12 | 2000-04-06 | 황을중 | Water saving device of shower bath using micom |
| KR100457454B1 (en) * | 2001-08-29 | 2004-11-17 | 신민철 | Digital flow meter |
| JP2012521504A (en) * | 2009-03-24 | 2012-09-13 | ヴェオリア オ − コンパニ ジェネラル デ ゾ | Equipment and methods for water quality monitoring in drinking water networks |
| CN112461317A (en) * | 2019-09-06 | 2021-03-09 | 北京亚华意诺斯新能源科技有限公司 | Simple driving system and instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3682326B2 (en) | 2005-08-10 |
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