JP4176437B2 - Gas meter and history reading device - Google Patents

Description

図３は第１の実施の形態のガスメータ及び履歴読み出し装置間の通信手順を示すシーケンス図である。遮断・警報履歴の読み出し手順は以下のようになる。まず、ガスメータ１の通信制御部１５が、履歴読み出し装置２から履歴読み出し指令を受信すると、通信制御部１５は、遮断・警報履歴部１６からの遮断・警報履歴に基づき第１の履歴電文を作成して履歴読み出し装置２に送信する。
【００２９】
履歴読み出し装置２の通信制御部２５は、第１の履歴電文の受信が終了すると、第２の履歴電文の受信を開始する。
【００３０】
ガスメータ１の通信制御部１５は、第１の履歴電文の送信が終了した時から所定時間待つ。これは、通信が正常に行われるように、履歴読み出し装置２による受信準備が行われるのを待つためである。その後、ガスメータ１の通信制御部１５は、遮断・警報履歴部１６からの遮断・警報履歴に基づき第２の履歴電文を作成して履歴読み出し装置２に送信する。履歴読み出し装置２は、第２の履歴電文を受信し、第１及び第２の履歴電文から遮断・警報履歴を経過時間形式で表示する。
【００３１】
次に、図４を参照して第１の実施の形態のガスメータの履歴電文送信処理を説明する。まず、履歴読み出し装置２から履歴読み出し指令を受信したかどうかを判定し（ステップＳ１１）、履歴読み出し指令を受信した場合には、遮断・警報履歴から第１の履歴電文を作成する（ステップＳ１３）。そして、電文データを送信し（ステップＳ１５）、全データを送信したかどうかを判定する（ステップＳ１７）。
【００３２】
全データを送信した場合には、送信が終了した時から所定時間待ち（ステップＳ１９）、遮断・警報履歴から第２の履歴電文を作成する（ステップＳ２１）。そして、電文データを送信し（ステップＳ２３）、全データを送信したかどうかを判定する（ステップＳ２５）。
【００３３】
次に、図５を参照して第１の実施の形態の履歴読み出し装置の履歴電文受信処理を説明する。まず、履歴読み出し指令をガスメータ１に送信すると（ステップＳ３１）、ガスメータ１から履歴電文からなるデータを受信する（ステップＳ３３）。そして、通信異常があるかどうかを判定し（ステップＳ３５）、通信異常がある場合には処理を終了する。通信異常がない場合には全データを受信したどうかを判定する（ステップＳ３７）。
【００３４】
そして、ガスメータ１から履歴電文からなるデータを受信する（ステップＳ３９）。そして、通信異常があるかどうかを判定し（ステップＳ４１）、通信異常がある場合にはステップＳ４５に進む。通信異常がない場合には全データを受信したかどうかを判定し（ステップＳ３４）、全データを受信した場合にはステップＳ４５に進む。
【００３５】
ステップＳ４５では、第２の履歴電文を受信したかどうかを判定する（ステップＳ４５）。第２の履歴電文を受信したと判定された場合には、経過日数と余り時間とに基づき遮断・警報履歴を経過時間形式で表示部２３に表示させる（ステップＳ４７）。第２の履歴電文を受信しないと判定された場合には、遮断・警報履歴を経過日数形式で表示部２３に表示させる（ステップＳ４９）。
【００３６】
第１の実施の形態の履歴読み出し装置２により遮断・警報履歴を経過時間形式で表示した様子を図６に示す。遮断・警報履歴の一例として、履歴１〜履歴５のそれぞれについて、発生事象、経過日数、遮断流量値の項目に文字又は数字が表示される。ここで、経過日数の項目には、経過時間形式で例えば５日１１時間と表示される。また、５日１１時間を１３１時間と表示することも可能である。なお、発生事象の（）内の数字は事象番号を表す。
【００３７】
以上の説明では、第１の実施の形態の経過時間を送信するガスメータ（新）及び第１の実施の形態の経過時間を受信する履歴読み出し装置（新）間の通信を説明したが、次に、ガスメータ（新）及び経過日数を受信する履歴読み出し装置（旧）間の通信、経過日数を送信するするガスメータ（旧）及び履歴読み出し装置（新）間の通信について説明する。
【００３８】
図７はガスメータ（新）及び履歴読み出し装置（旧）間の通信手順を示すシーケンス図である。履歴読み出し装置（旧）がガスメータ（新）の遮断・警報履歴を読み出す場合、履歴読み出し装置（旧）は、履歴読み出し命令をガスメータ（新）に送信する。ガスメータ（新）は、履歴読み出し命令に対して、第１の履歴電文と第２の履歴電文を送信する。履歴読み出し装置（旧）は、第１の履歴電文を受信すると、遮断・警報履歴を経過日数形式で表示する。履歴読み出し装置（旧）により遮断・警報履歴を経過日数形式で表示した様子を図８に示す。ここで、経過日数の項目には、経過日数形式で例えば５日と表示される。ガスメータ（新）が送信した第２の履歴電文は、履歴読み出し装置（旧）による受信動作が終了しているため、無視される。
【００３９】
図９はガスメータ（旧）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。履歴読み出し装置（新）がガスメータ（旧）の遮断・警報履歴を読み出す場合、履歴読み出し装置（新）は、履歴読み出し指令をガスメータ（旧）に送信する。ガスメータ（旧）は、履歴読み出し指令に対して、第１の履歴電文を送信する。履歴読み出し装置（新）は、第１の履歴電文を受信すると、第２の履歴電文の受信を開始するが、ガスメータ（旧）から第２の履歴電文を所定時間内に受信しないため、遮断・警報履歴を経過日数形式で表示する。
【００４０】
以上説明したように、遮断・警報履歴として遮断・警報が発生した時からの経過時間を読み出すように変更した場合でも、変更前の履歴読み出し装置（旧）で、変更後のガスメータ（新）の遮断・警報履歴を正確に読み出すことができる。
【００４１】
また、変更後の履歴読み出し装置（新）は変更前の履歴電文を扱うことができるようになっているため、変更前のガスメータ（旧）の遮断・警報履歴を正確に読み出すことができる。
【００４２】
（第２の実施の形態）
次に本発明の第２の実施の形態のガスメータ及び履歴読み出し装置を説明する。第１の実施の形態では、履歴読み出し装置から送信する履歴読み出し指令が同じである場合を説明したが、第２の実施の形態では、履歴読み出し装置からの履歴読み出し指令を経過日数で読み出すか経過時間で読み出すかによって異なるものとし、履歴読み出し指令を受信したガスメータは、履歴読み出し指令が経過日数の場合には第１の履歴電文のみを送信し、履歴読み出し指令が経過時間の場合には第１の履歴電文と第２の履歴電文の両方を送信することを特徴とする。
【００４３】
図１０は本発明のガスメータ及び履歴読み出し装置の第２の実施の形態の構成例を示す図である。ガスメータ１ａは、図１に示すガスメータ１に対して通信制御部１５ａの構成が異なるのみであり、履歴読み出し装置２ａは、図１に示す履歴読み出し装置２に対して通信制御部２５ａの構成が異なるのみであるので、その異なる部分のみを説明する。
【００４４】
履歴読み出し装置２ａ内の通信制御部２５ａは、経過日数と経過時間のどちらの形式で履歴情報を読み出すかによって、ガスメータ１ａに送信すべき履歴読み出し指令の種類を選択して送信する（本発明の指令選択手段に対応）。
【００４５】
ガスメータ１ａ内の通信制御部１５ａは、遮断や警報が発生した時からの経過日数を含む第１の履歴電文を作成して送信する機能と、履歴情報として遮断や警報が発生した時からの経過時間を含む履歴電文を作成して送信する機能とを有するとともに、外部からの履歴読み出し指令の種類に応じて、第１の履歴電文又は経過時間を含む履歴電文を選択して送信する（本発明の選択送信手段に対応）。また、通信制御部１５ａは、経過時間を含む履歴電文が選択された場合には、第１の履歴電文を作成して送信し、該第１の履歴電文の送信が終了した後に、経過時間を２４時間で除算した余り時間を含む第２の履歴電文を作成して送信する。
【００４６】
図１２はガスメータ（新）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。まず、履歴読み出し装置（新）は、遮断・警報履歴を経過日数で読み出す場合には、履歴読み出し指令Ａ（経過日数）をガスメータ（新）に送信する。ガスメータ（新）は、履歴読み出し指令Ａを受信した場合には、第１の履歴電文のみを履歴読み出し装置（新）に送信する。履歴読み出し装置（新）は、第１の履歴電文から遮断・警報履歴を経過日数形式で表示する。
【００４７】
一方、履歴読み出し装置（新）は、遮断・警報履歴を経過時間で読み出す場合には履歴読み出し指令Ｂ（経過時間）をガスメータ（新）に送信する。ガスメータ（新）は、履歴読み出し指令Ｂを受信した場合には、第１の履歴電文を送信し、第１の履歴電文の送信の終了から所定の待ち時間後に第２の履歴電文を送信する。履歴読み出し装置（新）は、第１及び第２の履歴電文から遮断・警報履歴を経過時間形式で表示する。即ち、ガスメータ（新）は、履歴読み出し指令Ｂに対して第１の履歴電文と第２の履歴電文を送信するため、履歴読み出しを正確に行うことができる。
【００４８】
次に図１１を参照して第２の実施の形態のガスメータの履歴電文送信処理を説明する。まず、履歴読み出し装置２ａから履歴読み出し指令を受信したかどうかを判定し（ステップＳ１１）、履歴読み出し指令を受信した場合には、履歴読み出し指令が指令Ａか指令Ｂかを判定する（ステップＳ１２）。指令が指令Ａの場合には、遮断・警報履歴から第１の履歴電文を作成する（ステップＳ１３ａ）。そして、電文データを送信し（ステップＳ１５ａ）、全データを送信したかどうかを判定する（ステップＳ１７ａ）。全データを送信した場合にはステップＳ１１に戻る。
【００４９】
一方、指令が指令Ｂの場合には、遮断・警報履歴から第１の履歴電文を作成する（ステップＳ１３）。そして、電文データを送信し（ステップＳ１５）、全データを送信したかどうかを判定する（ステップＳ１７）。
【００５０】
全データを送信した場合には、送信が終了した時から所定時間待ち（ステップＳ１９）、遮断・警報履歴から第２の履歴電文を作成する（ステップＳ２１）。そして、電文データを送信し（ステップＳ２３）、全データを送信したかどうかを判定する（ステップＳ２５）。全データを送信した場合にはステップＳ１１に戻る。
【００５１】
図１３はガスメータ（旧、新）及び履歴読み出し装置（旧）間の通信手順を示すシーケンス図である。図１３において、履歴読み出し装置（旧）が履歴読み出しを行う場合には、履歴読み出し指令Ａを送信し、ガスメータ（旧）とガスメータ（新）は、共に第１の履歴電文を送信する。このため、履歴読み出しを正確に行うことができる。また、ガスメータ（新）は、第２の履歴電文を送信しないので、余分な通信を行わずに済む。
【００５２】
図１４はガスメータ（旧、新）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。図１４において、履歴読み出し装置（新）が履歴読み出し指令Ａを送信した場合、ガスメータ（旧）とガスメータ（新）は、共に第１の履歴電文を送信する。このため、履歴読み出しを正確に行うことができる。
【００５３】
図１５はガスメータ（旧）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。図１５において、履歴読み出し装置（新）が履歴読み出し指令Ｂを送信した場合、ガスメータ（旧）は、履歴電文を送信しない。このため、通信が失敗するが、所定時間経過後に、履歴読み出し装置（新）が履歴読み出し指令Ａを送信すれば、ガスメータ（旧）は、第１の履歴電文を送信する。このため、履歴読み出しを正確に行うことができる。
【００５４】
以上説明したように、履歴読み出し装置とガスメータの新旧の組み合わせがどのようになっている場合でも、履歴読み出しを正確に行うことができる。
【００５５】
また、ガスメータ（新）が、履歴読み出し指令Ｂに対して第１の履歴電文と第２の履歴電文とに分けて送信するので、ガスメータが履歴読み出し装置から受信した指令Ａを指令Ｂと誤って判定してしまった場合でも、第１の履歴電文により履歴読み出しが正確に行なうことができる。
【００５６】
（変形例）
本発明は、前述した第１の実施の形態及び第２の実施の形態に限定されるものではない。第１の実施の形態及び第２の実施の形態では、遮断・警報が発生した時からの経過時間を読み出せるようにするために余り時間を履歴電文に追加する場合について説明したが、これ以外にも、本発明は、例えばガスを継続して使用していたガス使用時間などを追加する場合や、複数の項目を追加する場合にも適用可能である。
【００５７】
例えば余り時間とガス使用時間の２つの項目を追加する場合には、ガスメータは、経過日数を含む第１の履歴電文、余り時間を含む第２の履歴電文、ガス使用時間を含む第３の履歴電文の３つの履歴電文を順番に送信する。即ち、追加した項目数に応じて履歴電文を都度追加していくようにしても良い。この場合には、履歴読み出し装置は、履歴情報として追加された項目を含む１つ以上の履歴電文をガスメータから受信し、受信した履歴電文の数に応じて、表示または記録する履歴情報の表示形式または記録形式を選択してもよい。例えば、第１の履歴電文及び第２の履歴電文から経過日数と余り時間とを経過時間形式で表示し、第３の履歴電文からガス使用時間を時間形式で表示するようにしてもよい。
【００５８】
また、履歴読み出し装置が、履歴情報として読み出すための項目に応じて、ガスメータに送信する履歴読み出し指令の種類を選択し、ガスメータが、外部からの履歴読み出し指令の種類に応じて、送信すべき履歴電文の数を選択することにより、履歴情報として通知すべき項目を選択してもよい。これにより、遮断・警報履歴として通知する内容を追加した場合でも、履歴読み出し装置による履歴読み出しが正確に行われるようにすることができる。
【００５９】
このように、遮断・警報履歴として通知する内容を追加した場合であっても、変更前のガスメータと変更後の履歴読み出し装置との組み合わせでも履歴情報の読み出しが正確に行われるようになるため、履歴情報の読み出しを円滑に行うことができる。また、変更後のガスメータと変更前の履歴読み出し装置との組み合わせでも同様である。
【００６０】
【発明の効果】
本発明によれば、遮断・警報履歴として、遮断・警報が発生した時からの経過時間を読み出すように変更した場合でも、遮断・警報履歴の読み出しを正確に行うことができる。
【図面の簡単な説明】
【図１】本発明のガスメータ及び履歴読み出し装置の第１の実施の形態の構成例を示す図である。
【図２】第１の実施の形態の履歴電文の構成例を示す図である。
【図３】第１の実施の形態のガスメータ及び履歴読み出し装置間の通信手順を示すシーケンス図である。
【図４】第１の実施の形態のガスメータの履歴電文送信を示すフローチャートである。
【図５】第１の実施の形態の履歴読み出し装置の履歴電文受信を示すフローチャートである。
【図６】第１の実施の形態の履歴読み出し装置により遮断・警報履歴を経過時間形式で表示した様子を示す図である。
【図７】ガスメータ（新）及び履歴読み出し装置（旧）間の通信手順を示すシーケンス図である。
【図８】履歴読み出し装置（旧）により遮断・警報履歴を経過日数形式で表示した様子を示す図である。
【図９】ガスメータ（旧）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。
【図１０】本発明のガスメータ及び履歴読み出し装置の第２の実施の形態の構成例を示す図である。
【図１１】第２の実施の形態のガスメータの履歴電文送信を示すフローチャートである。
【図１２】ガスメータ（新）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。
【図１３】ガスメータ（旧、新）及び履歴読み出し装置（旧）間の通信手順を示すシーケンス図である。
【図１４】ガスメータ（旧、新）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。
【図１５】ガスメータ（旧）及び履歴読み出し装置（新）間の通信手順を示すシーケンス図である。
【図１６】従来のガスメータ及び履歴読み出し装置の構成例を示す図である。
【図１７】従来のガスメータが送信する経過日数を含む履歴電文の構成例（履歴電文Ａ）を示す図である。
【図１８】従来のガスメータ及び履歴読み出し装置間の通信手順を示すシーケンス図である。
【図１９】従来のガスメータの履歴電文送信を示すフローチャートである。
【図２０】従来の履歴読み出し装置の履歴電文受信を示すフローチャートである。
【図２１】従来のガスメータが送信する経過時間を含む履歴電文の構成例（履歴電文Ｂ）を示す図である。
【符号の説明】
１，１０…ガスメータ、２，２０…履歴読み出し装置、１１，２１…制御部、１２…流量センサ、１３…外部センサ、１４…遮断弁、１５，１５ａ，１５ｃ，２５，２５ａ…通信制御部、１６…遮断・警報履歴部、２２…操作部、２３…表示部、２４…情報メモリ。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas meter that monitors the gas use state and detects an abnormality, and relates to a history reading device that reads a cutoff / alarm history in the gas meter.
[0002]
[Prior art]
A configuration example of a conventional gas meter and history reading device is shown in FIG. In FIG. 16, a gas meter 10 includes a control unit 11 that controls each part, a flow rate sensor 12 that detects a flow rate pulse, an external sensor 13 such as a seismic device that detects an earthquake and a pressure switch that detects a pressure drop, and gas supply. A shutoff valve 14 for stopping, a communication control unit 15c, and a shutoff / alarm history unit 16 for storing shutoff / alarm history information are provided. The history reading device 20 reads the cutoff / alarm history in the gas meter 10.
[0003]
The control unit 11 calculates the gas flow rate based on the flow rate pulse detected by the flow rate sensor 12 and monitors whether there is an abnormal use of the gas, and also monitors the presence or absence of an earthquake or pressure drop according to the state of the external sensor 13. . When the control unit 11 detects an abnormal use of gas, an earthquake, a pressure drop, or the like, the control unit 11 closes the shutoff valve 14 to stop the gas supply or issue an alarm, and The type, generation time, gas flow rate at the time of generation, and the like are stored in the cutoff / alarm history unit 16 as cutoff / alarm history (history information).
[0004]
Further, when the shut-off / alarm history stored in the gas meter 10 is read from the shut-off / alarm history unit 16, the history reading device 20 transmits a history read command to the gas meter 10 as shown in the sequence of FIG. 18. When the communication control unit 15 c of the gas meter 10 receives the history reading command, the communication control unit 15 c creates a history message based on the cutoff / alarm history from the cutoff / alarm history unit 16.
[0005]
FIG. 17 shows a configuration example of a history message (history message A) including the elapsed days transmitted by a conventional gas meter. In the history message A shown in FIG. 17, for each of five interruptions / alarms (histories 1 to 5), the event number indicating the type of interruption / alarm that occurred, the number of days elapsed since the occurrence of the interruption / alarm, and the occurrence It is configured to notify the gas flow rate at the time.
[0006]
The communication control unit 15 c of the gas meter 10 transmits the created history message to the history reading device 20. When the history reading device 20 receives a history message, the history reading device 20 displays the history information.
[0007]
Next, the history message transmission process of the gas meter will be described with reference to FIG. First, it is determined whether or not a history reading command is received from the history reading device 20 (step S101). If a history reading command is received, a history message is created from the shut-off / alarm history (step S103). Then, the telegram data is transmitted (step S105), and it is determined whether or not all data has been transmitted (step S107).
[0008]
Next, the history message reception process of the history reading device will be described with reference to FIG. First, when a history reading command is transmitted to the gas meter 10 (step S111), data including a history message is received from the gas meter 10 (step S113). Then, it is determined whether or not there is a communication abnormality (step S115). If there is a communication abnormality, the process is terminated. If there is no communication abnormality, it is determined whether all data has been received (step S117), and if all data has been received, a shut-off / alarm history is displayed (step S119).
[0009]
Moreover, there exists patent document 1 as a technique relevant to the prior art mentioned above.
[0010]
[Patent Document 1]
Japanese Patent No. 3134793
[0011]
[Problems to be solved by the invention]
The history message A shown in FIG. 17 is configured to notify the number of days that have elapsed since the time when the interruption / alarm occurred. For this reason, when the interruption / warning has occurred is read out in units of days, there is a demand for reading out in units of hours.
[0012]
In order to realize such a request, in general, the history message is changed to a configuration (history message B) for notifying the elapsed time from the occurrence of the interruption / alarm to the present time as shown in FIG. And the history reading device is changed so as to correspond to the history message B.
[0013]
However, when such a configuration of the history message is changed, for example, a history reading device that receives the history message B cannot accurately read the cutoff / alarm history of the gas meter that transmits the history message A. Therefore, when a gas meter that transmits history telegram A and a gas meter that transmits history telegram B are installed in a mixed manner, which gas meter should be assigned to which consumer in order to read out the shut-off / alarm history accurately. The inconvenience arises that it is necessary to manage the installation and select a history reading device to be used for each consumer.
[0014]
The present invention has been made to solve such a problem, and even when the interruption / alarm history is changed so as to read out the elapsed time from the occurrence of the interruption / alarm, An object of the present invention is to provide a gas meter and a history reading device that can accurately perform reading.
[0015]
[Means for Solving the Problems]
The gas meter of the present invention calculates gas flow rate, performs gas shut-off and various warnings, stores history information of gas shut-off and warning, and generates shut-off and alarm as the history information in response to an external history read command. In the gas meter that creates and transmits the first communication message including the number of days that have passed since According to the type of the history read command from the outside, the first communication message or the transmission means for creating and transmitting a communication message including the elapsed time from when the interruption or alarm occurred as the history information Selection transmission means for selecting and transmitting a communication message including the elapsed time, and when the communication message including the elapsed time is selected by the selection transmission means, the transmission means includes the first communication message. After the transmission of the first communication message is completed, the elapsed time is divided by 24 hours when a predetermined waiting time elapses after the transmission of the first communication message is completed. Create and send a second communication message that includes the extra time It is characterized by that.
[0016]
According to this invention, When a communication message including the elapsed time is selected by the selective transmission means, The transmission means of the gas meter creates and transmits the first communication message, and after the transmission of the first communication message is completed, When a predetermined waiting time has elapsed since the transmission of the first communication message was completed A second communication message including a remaining time obtained by dividing the elapsed time from when the interruption or alarm occurs by 24 hours is generated and transmitted. In other words, when reading the elapsed time from the occurrence of the interruption / alarm, the remainder of dividing the elapsed time by 24 hours (one day) without changing the configuration of the first communication message including the elapsed days A second communication message including time is used.
[0017]
In addition, the history reading device of the present invention reads the history information from a gas meter that creates and transmits a first communication message including the number of days elapsed since the occurrence of a shutdown or alarm as gas shutdown or warning history information. In the history reading device, after receiving the first communication message, the second communication message including a remainder time obtained by dividing the elapsed time from the occurrence of the interruption or alarm by 24 hours. Within a given time A determination means for determining whether or not the gas meter has been received, and the second communication message. Within a given time If it is determined that it has been received, the elapsed time is displayed or recorded based on the elapsed days and the remaining time, and the second communication message is displayed. Within a given time Display recording control means for displaying or recording the elapsed days when it is determined not to receive And one or more communication messages including items added as the history information are received from the gas meter, and the format selection means for selecting the format of the history information to be displayed or recorded according to the number of received communication messages When It is characterized by providing.
[0018]
According to the present invention, the history reading device receives the first communication message including the elapsed days, and then receives the second communication message including the remaining time. Within a given time If it is not received, the blocking / alarm history is displayed in days from elapsed days, and the second communication message including the remaining time is displayed. Within a given time When received, the shut-off / alarm history is displayed in elapsed time format.
[0019]
Therefore, even when it is changed to read the elapsed time from when the shut-off / alarm occurs as the shut-off / alarm history, the history read-out device before the change can accurately read the shut-off / alarm history of the gas meter after the change. it can. In addition, since the history reading device after the change can handle the history message before the change, it is possible to accurately read the shut-off / alarm history of the gas meter before the change.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a gas meter and a history reading device according to the present invention will be described with reference to the drawings.
[0021]
(First embodiment)
FIG. 1 is a diagram showing a configuration example of a first embodiment of a gas meter and a history reading device according to the present invention.
[0022]
In FIG. 1, a gas meter 1 and a history reading device 2 constitute a data communication device. The gas meter 1 includes a control unit 11, a flow sensor 12, an external sensor 13, a cutoff valve 14, a communication control unit 15, and a cutoff / alarm history unit 16, and the configuration of the communication control unit is different from the conventional configuration of FIG. . Since the other configurations are the same, the same reference numerals are given to the same portions.
[0023]
The communication control unit 15 in the gas meter 1 corresponds to the transmission means of the present invention, and includes a first time that includes the number of days that have elapsed since the shutoff or alarm occurred as history information in response to a history readout command from the history readout device 2. A history message (corresponding to the first communication message of the present invention) is created and transmitted, and after the transmission of the first history message is completed, the elapsed time from when the interruption or alarm occurs is divided by 24 hours. A second history message including the surplus time (corresponding to the second communication message of the present invention) is created and transmitted.
[0024]
FIG. 2 is a diagram illustrating a configuration example of a history message according to the first embodiment. In FIG. 2, the first history message has the same configuration as the conventional history message A, and indicates the type of interruption / alarm that has occurred for each of the five interruptions / alarms (history 1-5). It is configured to notify the event number, the number of days that have elapsed since the occurrence of the interruption / alarm, and the gas flow rate at the time of occurrence.
[0025]
The second history telegram is configured to notify the remaining time obtained by converting the elapsed time from the occurrence of the interruption / alarm to 24 hours (one day) for each of the five interruptions / alarms. For example, if the elapsed time is 25 hours, the extra time is 1 hour.
[0026]
The history reading device 2 includes a control unit 21 that controls each unit, an operation unit 22 that inputs a history reading command for reading history information, a display unit 23 that displays data, an information memory 24 that stores history information, and communication control. The unit 25 is provided.
[0027]
The communication control unit 25 receives the first history message including the elapsed days, and after receiving the first history message, the communication control unit 25 determines whether the second history message including the remaining time is received from the gas meter 1. If it is determined (corresponding to the determination means of the present invention) and it is determined that the second history message has been received, the elapsed time is displayed on the display unit 23 or recorded in the information memory 24 based on the elapsed days and the remaining time. If it is determined that the second history message is not received, the elapsed days are displayed on the display unit 23 or recorded in the information memory 24 (corresponding to the display record control means of the present invention). Further, the communication control unit 25 calculates the elapsed time from when the interruption / alarm is generated from the elapsed days of the first history message and the remaining time of the second history message using Equation (1). You can also.
[0028]

FIG. 3 is a sequence diagram illustrating a communication procedure between the gas meter and the history reading device according to the first embodiment. The procedure for reading the interrupt / alarm history is as follows. First, when the communication control unit 15 of the gas meter 1 receives a history reading command from the history reading device 2, the communication control unit 15 creates a first history message based on the cutoff / alarm history from the cutoff / alarm history unit 16. To the history reading device 2.
[0029]
When the reception of the first history message ends, the communication control unit 25 of the history reading device 2 starts receiving the second history message.
[0030]
The communication control unit 15 of the gas meter 1 waits for a predetermined time from the end of transmission of the first history message. This is to wait for reception preparation by the history reading device 2 to be performed normally. Thereafter, the communication control unit 15 of the gas meter 1 creates a second history message based on the cutoff / alarm history from the cutoff / alarm history unit 16 and transmits it to the history reading device 2. The history reading device 2 receives the second history message, and displays the cutoff / alarm history from the first and second history messages in an elapsed time format.
[0031]
Next, the history message transmission process of the gas meter according to the first embodiment will be described with reference to FIG. First, it is determined whether or not a history reading command is received from the history reading device 2 (step S11). If a history reading command is received, a first history message is created from the shut-off / alarm history (step S13). . Then, the telegram data is transmitted (step S15), and it is determined whether or not all data has been transmitted (step S17).
[0032]
When all the data has been transmitted, a predetermined time is waited after the transmission is completed (step S19), and a second history message is created from the cutoff / alarm history (step S21). Then, the telegram data is transmitted (step S23), and it is determined whether or not all data has been transmitted (step S25).
[0033]
Next, a history message reception process of the history reading device according to the first embodiment will be described with reference to FIG. First, when a history reading command is transmitted to the gas meter 1 (step S31), data including a history message is received from the gas meter 1 (step S33). Then, it is determined whether or not there is a communication abnormality (step S35). If there is a communication abnormality, the process is terminated. If there is no communication abnormality, it is determined whether all data has been received (step S37).
[0034]
Then, data consisting of a history message is received from the gas meter 1 (step S39). Then, it is determined whether or not there is a communication abnormality (step S41). If there is a communication abnormality, the process proceeds to step S45. If there is no communication abnormality, it is determined whether all data has been received (step S34), and if all data has been received, the process proceeds to step S45.
[0035]
In step S45, it is determined whether the second history message has been received (step S45). If it is determined that the second history message has been received, the cutoff / alarm history is displayed on the display unit 23 in the elapsed time format based on the elapsed days and the remaining time (step S47). When it is determined that the second history message is not received, the interruption / alarm history is displayed on the display unit 23 in the elapsed days format (step S49).
[0036]
FIG. 6 shows a state where the shut-off / alarm history is displayed in the elapsed time format by the history reading device 2 of the first embodiment. As an example of the interruption / alarm history, letters or numbers are displayed in the items of the occurrence event, the elapsed days, and the interruption flow rate value for each of the histories 1 to 5. Here, in the item of elapsed days, for example, 5 days and 11 hours are displayed in the elapsed time format. It is also possible to display 11 hours on the 5th as 131 hours. In addition, the number in () of the occurrence event represents the event number.
[0037]
In the above description, communication between the gas meter (new) for transmitting the elapsed time of the first embodiment and the history reading device (new) for receiving the elapsed time of the first embodiment has been described. Communication between the gas meter (new) and the history reading device (old) that receives the elapsed days and communication between the gas meter (old) that transmits the elapsed days and the history reading device (new) will be described.
[0038]
FIG. 7 is a sequence diagram showing a communication procedure between the gas meter (new) and the history reading device (old). When the history reading device (old) reads the shut-off / alarm history of the gas meter (new), the history reading device (old) transmits a history reading command to the gas meter (new). The gas meter (new) transmits the first history message and the second history message in response to the history read command. When the history reading device (old) receives the first history message, the history reading device displays the cutoff / alarm history in the elapsed days format. FIG. 8 shows a state in which the shut-off / alarm history is displayed in the elapsed days format by the history reading device (old). Here, in the item of elapsed days, for example, 5 days is displayed in the elapsed days format. The second history message transmitted from the gas meter (new) is ignored because the reception operation by the history reading device (old) has been completed.
[0039]
FIG. 9 is a sequence diagram showing a communication procedure between the gas meter (old) and the history reading device (new). When the history reading device (new) reads the shut-off / alarm history of the gas meter (old), the history reading device (new) transmits a history reading command to the gas meter (old). The gas meter (old) transmits a first history message in response to the history read command. When receiving the first history message, the history reading device (new) starts receiving the second history message, but does not receive the second history message from the gas meter (old) within a predetermined time. Displays the alarm history in elapsed days format.
[0040]
As explained above, even if it is changed to read the elapsed time from the time when the shut-off / alarm occurred as the shut-off / alarm history, the history meter reading device (old) before the change of the gas meter (new) after the change The interruption / alarm history can be read accurately.
[0041]
Moreover, since the history reading device after the change (new) can handle the history message before the change, the shut-off / alarm history of the gas meter (old) before the change can be read accurately.
[0042]
(Second Embodiment)
Next, a gas meter and a history reading device according to a second embodiment of the present invention will be described. In the first embodiment, a case has been described in which the history reading command transmitted from the history reading device is the same, but in the second embodiment, whether the history reading command from the history reading device is read in the number of elapsed days or not has elapsed. The gas meter that has received the history readout command transmits only the first history message when the history readout command is the elapsed number of days, and the first meter when the history readout command is the elapsed time. Both the history message and the second history message are transmitted.
[0043]
FIG. 10 is a diagram showing a configuration example of the second embodiment of the gas meter and the history reading device of the present invention. The gas meter 1a differs from the gas meter 1 shown in FIG. 1 only in the configuration of the communication control unit 15a, and the history reading device 2a differs from the history reading device 2 shown in FIG. 1 in the configuration of the communication control unit 25a. Therefore, only the different parts will be described.
[0044]
The communication control unit 25a in the history reading device 2a selects and transmits the type of history reading command to be transmitted to the gas meter 1a depending on whether the history information is read in the elapsed days or the elapsed time (in the present invention). Corresponds to command selection means).
[0045]
The communication control unit 15a in the gas meter 1a has a function of creating and transmitting a first history message including the number of days elapsed since the occurrence of the interruption or alarm, and a process since the occurrence of the interruption or alarm as the history information. And a function for creating and transmitting a history message including time, and selecting and transmitting a first history message or a history message including elapsed time according to the type of history reading command from the outside (the present invention). Corresponding to the selective transmission means). In addition, when a history message including the elapsed time is selected, the communication control unit 15a creates and transmits a first history message, and after the transmission of the first history message ends, the communication control unit 15a sets the elapsed time. A second history message including the remaining time divided by 24 hours is created and transmitted.
[0046]
FIG. 12 is a sequence diagram showing a communication procedure between the gas meter (new) and the history reading device (new). First, the history reading device (new) transmits a history reading command A (elapsed days) to the gas meter (new) when reading the shut-off / alarm history in elapsed days. When receiving the history reading command A, the gas meter (new) transmits only the first history message to the history reading device (new). The history reading device (new) displays the cutoff / alarm history from the first history message in the elapsed days format.
[0047]
On the other hand, the history reading device (new) transmits a history reading command B (elapsed time) to the gas meter (new) when reading the cutoff / alarm history with the elapsed time. When the gas meter (new) receives the history read command B, the gas meter (new) transmits the first history message, and transmits the second history message after a predetermined waiting time from the end of transmission of the first history message. The history reading device (new) displays the cutoff / alarm history from the first and second history messages in an elapsed time format. That is, since the gas meter (new) transmits the first history message and the second history message in response to the history reading command B, the history reading can be performed accurately.
[0048]
Next, a history message transmission process of the gas meter according to the second embodiment will be described with reference to FIG. First, it is determined whether or not a history reading command is received from the history reading device 2a (step S11). If a history reading command is received, it is determined whether the history reading command is the command A or the command B (step S12). . When the command is the command A, a first history message is created from the cutoff / alarm history (step S13a). Then, the telegram data is transmitted (step S15a), and it is determined whether or not all data has been transmitted (step S17a). If all the data has been transmitted, the process returns to step S11.
[0049]
On the other hand, when the command is the command B, a first history message is created from the cutoff / alarm history (step S13). Then, the telegram data is transmitted (step S15), and it is determined whether or not all data has been transmitted (step S17).
[0050]
When all the data has been transmitted, a predetermined time is waited after the transmission is completed (step S19), and a second history message is created from the cutoff / alarm history (step S21). Then, the telegram data is transmitted (step S23), and it is determined whether or not all data has been transmitted (step S25). If all the data has been transmitted, the process returns to step S11.
[0051]
FIG. 13 is a sequence diagram showing a communication procedure between the gas meter (old and new) and the history reading device (old). In FIG. 13, when the history reading device (old) performs history reading, a history reading command A is transmitted, and the gas meter (old) and the gas meter (new) both transmit the first history message. For this reason, history reading can be performed accurately. Moreover, since the gas meter (new) does not transmit the second history message, it is not necessary to perform extra communication.
[0052]
FIG. 14 is a sequence diagram showing a communication procedure between the gas meter (old and new) and the history reading device (new). In FIG. 14, when the history reading device (new) transmits a history reading command A, the gas meter (old) and the gas meter (new) both transmit a first history message. For this reason, history reading can be performed accurately.
[0053]
FIG. 15 is a sequence diagram showing a communication procedure between the gas meter (old) and the history reading device (new). In FIG. 15, when the history reading device (new) transmits a history reading command B, the gas meter (old) does not transmit a history message. For this reason, although communication fails, if a history reading device (new) transmits a history reading command A after a predetermined time elapses, the gas meter (old) transmits a first history message. For this reason, history reading can be performed accurately.
[0054]
As described above, history reading can be accurately performed regardless of the combination of new and old history reading devices and gas meters.
[0055]
Further, since the gas meter (new) transmits the first history message and the second history message in response to the history reading command B, the command A received by the gas meter from the history reading device is mistakenly designated as the command B. Even when the determination is made, the history can be read accurately by the first history message.
[0056]
(Modification)
The present invention is not limited to the first embodiment and the second embodiment described above. In the first embodiment and the second embodiment, the case has been described in which the extra time is added to the history message so that the elapsed time from when the interruption / alarm occurs can be read. In addition, the present invention can be applied to, for example, a case where a gas use time during which a gas is continuously used is added, or a case where a plurality of items are added.
[0057]
For example, when two items of extra time and gas usage time are added, the gas meter displays a first history message including the elapsed days, a second history message including the extra time, and a third history including the gas usage time. Three history messages of the message are transmitted in order. That is, history messages may be added each time according to the number of added items. In this case, the history reading device receives one or more history messages including items added as history information from the gas meter, and displays or records history information according to the number of history messages received. Alternatively, the recording format may be selected. For example, the elapsed days and the remaining time may be displayed in the elapsed time format from the first history message and the second history message, and the gas usage time may be displayed in the time format from the third history message.
[0058]
Further, the history reading device selects the type of history reading command to be transmitted to the gas meter according to the item to be read as history information, and the gas meter should transmit the history according to the type of history reading command from the outside. An item to be notified as history information may be selected by selecting the number of messages. Thereby, even when the content to be notified as the shut-off / alarm history is added, the history reading by the history reading device can be accurately performed.
[0059]
In this way, even when the content to be notified as the shut-off / alarm history is added, history information can be read accurately even in combination with the gas meter before the change and the history read device after the change, The history information can be read out smoothly. The same applies to the combination of the gas meter after the change and the history reading device before the change.
[0060]
【The invention's effect】
According to the present invention, even when the passage / alarm history is changed so as to read the elapsed time since the occurrence of the cutoff / alarm, the cutoff / alarm history can be read accurately.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration example of a first embodiment of a gas meter and a history reading device according to the present invention.
FIG. 2 is a diagram illustrating a configuration example of a history message according to the first embodiment.
FIG. 3 is a sequence diagram illustrating a communication procedure between the gas meter and the history reading device according to the first embodiment.
FIG. 4 is a flowchart showing history message transmission of the gas meter according to the first embodiment.
FIG. 5 is a flowchart illustrating history message reception of the history reading device according to the first embodiment;
FIG. 6 is a diagram illustrating a state in which a cutoff / alarm history is displayed in an elapsed time format by the history reading device according to the first embodiment.
FIG. 7 is a sequence diagram showing a communication procedure between a gas meter (new) and a history reading device (old).
FIG. 8 is a diagram illustrating a state in which a shut-off / alarm history is displayed in an elapsed days format by a history reading device (old).
FIG. 9 is a sequence diagram showing a communication procedure between a gas meter (old) and a history reading device (new).
FIG. 10 is a diagram illustrating a configuration example of a second embodiment of a gas meter and a history reading device according to the present invention.
FIG. 11 is a flowchart showing history message transmission of the gas meter according to the second embodiment.
FIG. 12 is a sequence diagram showing a communication procedure between a gas meter (new) and a history reading device (new).
FIG. 13 is a sequence diagram showing a communication procedure between a gas meter (old and new) and a history reading device (old).
FIG. 14 is a sequence diagram showing a communication procedure between a gas meter (old and new) and a history reading device (new).
FIG. 15 is a sequence diagram showing a communication procedure between a gas meter (old) and a history reading device (new).
FIG. 16 is a diagram showing a configuration example of a conventional gas meter and history reading device.
FIG. 17 is a diagram showing a configuration example (history message A) of a history message including the elapsed days transmitted by a conventional gas meter.
FIG. 18 is a sequence diagram showing a communication procedure between a conventional gas meter and a history reading device.
FIG. 19 is a flowchart showing history message transmission of a conventional gas meter.
FIG. 20 is a flowchart showing history message reception of a conventional history reading device.
FIG. 21 is a diagram showing a configuration example (history message B) of a history message including an elapsed time transmitted by a conventional gas meter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,10 ... Gas meter, 2,20 ... History reading device, 11, 21 ... Control part, 12 ... Flow rate sensor, 13 ... External sensor, 14 ... Shut-off valve, 15, 15a, 15c, 25, 25a ... Communication control part, 16 ... Blocking / alarm history part, 22 ... Operation part, 23 ... Display part, 24 ... Information memory.

Claims (4)

Gas flow calculation, gas shut-off and various warnings are performed, history information of gas shut-off and warning is stored, and the number of days that have elapsed since the shut-off and alarm occurred as the history information according to the history read command from the outside In a gas meter that creates and transmits a first communication message including
A transmission means for creating and transmitting a communication message including an elapsed time from when the interruption or alarm occurs as the history information;
Select transmission means for selecting and transmitting the first communication message or the communication message including the elapsed time according to the type of the history reading command from the outside,
Bei to give a,
When the communication message including the elapsed time is selected by the selection transmission unit, the transmission unit creates and transmits the first communication message, and after the transmission of the first communication message is completed Generating and transmitting a second communication message including a remaining time obtained by dividing the elapsed time by 24 hours when a predetermined waiting time has elapsed from the end of transmission of the first communication message. Gas meter. In the gas meter of claim 1 Symbol placement, to add items to be notified as the history information, the transmission unit, after completing the transmission of additional previous communication message, one or more including the added items A gas meter that sequentially transmits communication messages. 3. The gas meter according to claim 2 , wherein the selection transmission means selects the number of communication messages to be transmitted in accordance with the type of the history read command from the outside, whereby the item to be notified as the history information. Gas meter characterized by selection. In the history reading device that reads out the history information from the gas meter that creates and transmits the first communication message including the number of days elapsed since the occurrence of the shutdown or alarm as the history information of the gas shutdown or warning,
After the reception of the first communication message is completed, a second communication message including a remainder time obtained by dividing the elapsed time from the occurrence of the interruption or alarm by 24 hours is received from the gas meter within a predetermined time . Determining means for determining whether or not
If it is determined that the second communication message has been received within a predetermined time, the elapsed time is displayed or recorded based on the elapsed days and the remaining time, and the second communication message is stored within the predetermined time. , the display recording control means for displaying or recording the age when it is determined not received,
Format selection means for receiving one or more communication messages including items added as the history information from the gas meter, and selecting a format of the history information to be displayed or recorded according to the number of received communication messages;
A history reading device comprising:

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