JPH06288808A - Gas flow data storage - Google Patents
Gas flow data storageInfo
- Publication number
- JPH06288808A JPH06288808A JP10033293A JP10033293A JPH06288808A JP H06288808 A JPH06288808 A JP H06288808A JP 10033293 A JP10033293 A JP 10033293A JP 10033293 A JP10033293 A JP 10033293A JP H06288808 A JPH06288808 A JP H06288808A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- fluctuation
- value
- time
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Landscapes
- Measuring Volume Flow (AREA)
- Recording Measured Values (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、一般家庭等におけるガ
ス器具使用状況のデータを格納するガス流量データ格納
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas flow rate data storage device for storing data on the status of gas appliance use in general households.
【０００２】[0002]
【従来技術】一般家庭等にて使用されているガス器具を
流量計を用いて判断する方法として従来は、特開昭５７
−１９５９７８号等の発明が知られている。この発明
は、供給ガスの流量を一定時間毎に測定し、ガスの流量
に増加や、もしくは減少が生じたときに、この増減分を
新たなガス器具の使用の開始もしくは終了とみなして、
この変化分に相当するガス器具が存在することを判断し
ていた。2. Description of the Related Art As a method for determining a gas appliance used at home or the like by using a flow meter, there is a conventional method disclosed in Japanese Patent Laid-Open No.
Inventions such as No. 195978 are known. This invention measures the flow rate of the supply gas at regular intervals, and when the flow rate of the gas increases or decreases, considers this increase or decrease as the start or end of the use of a new gas appliance,
It was determined that there was a gas appliance corresponding to this change.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記従来
の発明は、一定時間以上経過した毎に流量データを得て
その流量から判断していたため、得られる流量は一定時
間内の平均値となって正確な流量を計測することができ
ず、確実にガス器具を判定することができなかった。更
に、使用が開始されてからこの一定時間内に使用を終了
させたガス器具があった場合にはこのガス器具の使用を
とらえることができず、このように使用が短時間に終了
するようなガス器具を確実に判定することができなかっ
た。However, in the above-mentioned conventional invention, since the flow rate data is obtained every time a certain period of time has elapsed and the determination is made from the flow rate, the obtained flow rate is an average value within a certain period of time and is accurate. It was not possible to measure the appropriate flow rate, and it was not possible to reliably determine the gas appliance. Furthermore, if there is a gas appliance that has finished using within a certain period of time since the start of use, it is not possible to catch the use of this gas appliance, and thus, the use may end in a short time. The gas appliance could not be determined reliably.
【０００４】また、使用量が同一のガス器具が複数ある
場合には、それぞれのガス器具を区別して判定すること
ができなかった。Further, when there are a plurality of gas appliances having the same amount of use, it is not possible to distinguish between the gas appliances.
【０００５】[0005]
【課題を解決するための手段】そこで本発明では、単位
量の流体が通過したことを示す流量信号から順次流体の
流量を計測し、該流量が安定した時点の流量を基準とし
て該流量から変動した流量までの間の差を検出する検出
手段と、前記流量に変動が生じたとき該変動の発生時刻
を記録するとともに該変動が増加の場合には該変動差に
対応する流量の欄の第二の器具数の項目の値を順次加算
し、該変動が減少の場合には該項目の値を順次減算させ
るとともに該第二の器具数の項目の最大値と該流量の欄
の第一の器具数の項目の値とを比較して該第二の器具数
の最大値の方が大きい時には前記第一の器具数の値を該
第二の器具数の最大値に変更するようにした記録手段と
からガス流量データ格納装置を構成したのである。Therefore, in the present invention, the flow rate of the fluid is sequentially measured from the flow rate signal indicating that a unit amount of fluid has passed, and the flow rate at the time when the flow rate becomes stable is changed as a reference. Detecting means for detecting a difference between the flow rate and the flow rate, and when the flow rate fluctuates, the time of occurrence of the fluctuation is recorded, and when the fluctuation is increased, the flow rate column corresponding to the fluctuation difference Second, the value of the item of the number of appliances is sequentially added, and when the fluctuation is decreased, the value of the item is sequentially subtracted, and the maximum value of the item of the second number of the appliance and the first value in the column of the flow rate are added. A record in which the value of the first number of appliances is changed to the maximum value of the second number of appliances when the maximum value of the second number of appliances is greater than the value of the number of appliances The means and the gas flow rate data storage device are configured.
【０００６】[0006]
【作用】単位流量毎に出力される流量信号を流量の計測
に用いていることから、流量を正確にとらえ、しかも使
用時間が短時間であっても確実に記録させることができ
る。更に、同一流量のガス器具を個別に感知してその台
数等の検出を行なわせることができる。Since the flow rate signal output for each unit flow rate is used for measuring the flow rate, the flow rate can be accurately grasped and the recording can be surely performed even when the usage time is short. Further, it is possible to individually detect gas appliances having the same flow rate and detect the number of them.
【０００７】[0007]
【実施例】以下、本発明にかかるガス流量データ格納装
置の一実施例について説明する。図３に本発明の方法を
実施するための流量データ格納装置の一例を示す。流量
格納装置２は、検出手段６と、記録手段８等から構成さ
れ、ガス管９に設置された流量計４が検出手段６に接続
されている。この流量計４は、管９内をガスが所定単位
量流通する毎に流量信号を１つのパルスとして出力す
る。検出手段６は、パルスで出力される流量信号のパル
ス間隔を計測して、この時間間隔から通過したガスの流
量を求め、流量の変動を検出できるようになっている。
そして、この流量の変動から図４に示すグラフを求め、
このグラフから頻繁に現れる使用量、すなわちａ、ｂ、
ｃ、ｄの各使用量のガス器具が存在するであろうことを
一応推測し、その推測結果を図２の表−１に入れる。そ
の後、この推測結果を入れた表を用いて流量データを記
録手段８に格納記録させる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas flow rate data storage device according to the present invention will be described below. FIG. 3 shows an example of a flow rate data storage device for carrying out the method of the present invention. The flow rate storage device 2 is composed of a detection means 6 and a recording means 8 and the like, and a flow meter 4 installed in a gas pipe 9 is connected to the detection means 6. The flow meter 4 outputs a flow rate signal as one pulse each time a predetermined amount of gas flows through the pipe 9. The detecting means 6 is adapted to measure the pulse interval of the flow rate signal output as a pulse, determine the flow rate of the passing gas from this time interval, and detect the fluctuation of the flow rate.
Then, the graph shown in FIG. 4 is obtained from the fluctuation of the flow rate,
Usage that appears frequently from this graph, namely a, b,
It is presumed that there will be gas appliances of the amounts c and d used, and the estimation results are shown in Table-1 of FIG. After that, the flow rate data is stored and recorded in the recording means 8 using the table in which the estimation result is entered.
【０００８】図１に、本実施例にかかる流量データの格
納に関するフローチャートを示す。まずＦ−１において
流量に変化があったか否かを判別し、変化がなければＥ
ＮＤに進む。Ｆ−２にて、増加変化が生じていればＦ−
３に進み、前回の流量Ｑ１が０か否かを判定する。Ｑ１
が０でなければＦ−４に進み、今回の流量Ｑ２から前回
の流量Ｑ１を減算し、その差ｑを求めＦ−６に進む。一
方Ｑ１が０であればＦ−５に進み、Ｑ２をｑに入れ、Ｆ
−６に進む。Ｆ−６では、ｑが表に記録されている値と
近似しているか否かを判断し、近似したものがある場合
には、Ｆ−７に進み、表のｑに対応する欄の第二の器具
数、ＡＲＡ２の項目の値（以下これを（ＡＲＡ２）q と
する。）に１を加算し、Ｆ−１０に進む。FIG. 1 shows a flowchart relating to the storage of flow rate data according to this embodiment. First, in F-1, it is determined whether the flow rate has changed, and if there is no change, E
Proceed to ND. If there is an increase in F-2, then F-
In step 3, it is determined whether the previous flow rate Q1 is 0. Q1
Is not 0, the flow proceeds to F-4, the previous flow Q1 is subtracted from the current flow Q2, the difference q is obtained, and the flow proceeds to F-6. On the other hand, if Q1 is 0, go to F-5, put Q2 in q, and
Go to -6. In F-6, it is judged whether q is close to the value recorded in the table. If there is a close value, the process proceeds to F-7, where the second column in the column corresponding to q in the table is selected. 1 is added to the number of appliances and the value of the item of ARA2 (hereinafter, this is referred to as (ARA2) q), and the process proceeds to F-10.
【０００９】一方Ｆ−６にて表中に近似した値がない場
合には、Ｆ−８に進み表中に新たに流量ｑの欄を作成す
る。そして、Ｆ−９に進みこの欄の（ＡＲＡ２）q の値
に１を加算しＦ−１０に進む。Ｆ−１０では（ＡＲＡ
２）q の値が２より大きいあるいは等しいか否かを判別
し、該当しなければＦ−１３に進む。Ｆ−１０にて該当
すればＦ−１１に進み、（ＡＲＡ２）q と（ＡＲＡ１）
q （表のｑに対応する欄の第一の器具数ＡＲＡ１の項目
の値）とを比較し、（ＡＲＡ２）q の方が小さい場合に
はＦ−１３に進み、それ以外ではＦ−１２にて（ＡＲＡ
２）q を（ＡＲＡ１）q に入れ、Ｆ−１３に進む。On the other hand, if there is no approximate value in the table at F-6, the process proceeds to F-8 and a new column of flow rate q is created in the table. Then, the process proceeds to F-9, 1 is added to the value of (ARA2) q in this column, and the process proceeds to F-10. In F-10 (ARA
2) It is determined whether or not the value of q is greater than or equal to 2, and if not, the process proceeds to F-13. If applicable at F-10, proceed to F-11, (ARA2) q and (ARA1)
q (the value of the item of the first device number ARA1 in the column corresponding to q in the table) is compared, and if (ARA2) q is smaller, proceed to F-13, otherwise, proceed to F-12. Te (ARA
2) Put q into (ARA1) q and proceed to F-13.
【００１０】Ｆ−１３では（ＡＲＡ２）q が１か否かを
判別し、１でなければＦ−１４に進み使用量ｑの器具の
使用が開始されたことをこの欄のＮｏ．ｎ（ｎは（ＡＲ
Ａ２）q の値）に記録する。一方１であれば、Ｆ−１５
に進み、使用量ｑの器具の使用が開始されたことをＮ
ｏ．ｎ（この場合ｎは１）に記録し、Ｆ−１６で記録手
段８に送る。In F-13, it is judged whether or not (ARA2) q is 1, and if it is not 1, it proceeds to F-14, and it is confirmed that the use of the device with the usage amount q is started. n (n is (AR
A2) The value of q) is recorded. On the other hand, if it is 1, F-15
And proceed to N
o. n (n is 1 in this case) is recorded and sent to the recording means 8 by F-16.
【００１１】一方、Ｆ−２で流量変化が減少の場合に
は、Ｆ−１７に進み、Ｑ２が０か否かを判別する。Ｆ−
１７でＱ２が０でなければＦ−１８でＱ１−Ｑ２をｑに
し、Ｆ−２０に進み、０であるときにはＦ−１９にてＱ
１をｑとしてＦ−２０に進む。Ｆ−２０では、ｑが表に
掲げられた使用流量と一致しているか否かを判断し、一
致したものがあればＦ−２８に進む。表に一致したもの
がない場合には、Ｆ−２１に進みｑにｑｓを加えた値を
ｑｓとしてＦ−２２に進む。On the other hand, when the change in the flow rate decreases at F-2, the routine proceeds to F-17, where it is determined whether Q2 is 0 or not. F-
If Q2 is not 0 at 17, set Q1-Q2 to q at F-18 and proceed to F-20. If it is 0, at Q at F-19
Set 1 to q and proceed to F-20. In F-20, it is judged whether q matches the used flow rate listed in the table, and if there is a match, the process proceeds to F-28. If there is no match in the table, the process proceeds to F-21, and the value obtained by adding qs to q is set as qs, and the process proceeds to F-22.
【００１２】Ｆ−２２では、ｑｓが表に掲げられた使用
流量と一致しているか否かを判断し、一致したものがあ
ればＦ−２６でｑｓをｑにし、Ｆ−２７でｑｓを０にし
てＦ−２８に進む。一方Ｆ−２２で一致したものがない
場合には、Ｆ−２３に進み、ｑｓがｑｍａｘ（表におけ
る最大流量）より小さいか否かを判別し、小さければＦ
−１６に進み、記録手段８に送る。また、Ｆ−２３にて
ｑｓの方が大きい場合にはＦ−２４に進みｑｓからｑｍ
ａｘを減算した値をｑｓとし、Ｆ−２５でｑｍａｘをｑ
として、Ｆ−２８に進む。Ｆ−２８では、表におけるｑ
に対応する（ＡＲＡ２）q の値から１を減算し、Ｆ−２
９に進む。In F-22, it is judged whether qs matches the flow rate used in the table, and if there is a match, q is set in q by F-26 and qs is set by 0 in F-27. Then proceed to F-28. On the other hand, if there is no match in F-22, the flow proceeds to F-23, where it is determined whether qs is smaller than qmax (maximum flow rate in the table).
Proceed to -16 and send to the recording means 8. When qs is larger at F-23, the process proceeds to F-24 and qs to qm.
The value obtained by subtracting ax is set to qs, and qmax is set to q in F-25.
, Proceed to F-28. In F-28, q in the table
1 is subtracted from the value of (ARA2) q corresponding to
Proceed to 9.
【００１３】Ｆ−２９では（ＡＲＡ２）q が０か否かを
判別し、０でなければＦ−３０にて使用量ｑの器具の使
用が終了したことをＮｏ．ｎに記録し、Ｆ−１６に進
む。一方、Ｆ−２９にて（ＡＲＡ２）q が０であれば使
用量ｑの器具の使用が終了したことをＮｏ１に記録し
て、Ｆ−１６に進み、記録手段８に送る。In F-29, it is judged whether or not (ARA2) q is 0. If it is not 0, it is determined in F-30 that the use of the device with the usage amount q is completed. Record in n and go to F-16. On the other hand, if (ARA2) q is 0 in F-29, the fact that the use of the device with the usage amount q is completed is recorded in No. 1, the process proceeds to F-16, and is sent to the recording means 8.
【００１４】以上のように図１のフローチャートを実行
することによって表の（ＡＲＡ１）q 、（ＡＲＡ２）q
の数値や時刻等が順次記録格納される。By executing the flow chart of FIG. 1 as described above, (ARA1) q and (ARA2) q of the table
Numerical values, time, etc. are sequentially recorded and stored.
【００１５】したがって、本実施例にかかるガス流量デ
ータ格納装置によれば、逐一入力される流量信号の流量
に基づいて流量変化を得ることとしたので、正確なガス
流量の変化を得ることができ、しかも使用時間が短時間
のガス器具であっても、確実に把握することができる。Therefore, according to the gas flow rate data storage device of the present embodiment, since the flow rate change is obtained based on the flow rate of the flow rate signal input one by one, it is possible to obtain an accurate change of the gas flow rate. Moreover, even if the gas appliance is used for a short time, it can be surely grasped.
【００１６】更に、本実施例のガス流量データ格納装置
によって得られる（流量）と（ＡＲＡ１）のデータを用
いることにより、各流量に応じた取り付け器具数が確認
できる。又、（ＡＲＡ２）とＮｏ．１〜Ｎｏ．ｎの時刻
データを用いることにより、所定時間内の流量毎の器具
数、最大使用時間を確認することができる。Further, by using the data of (flow rate) and (ARA1) obtained by the gas flow rate data storage device of the present embodiment, the number of attachment devices corresponding to each flow rate can be confirmed. In addition, (ARA2) and No. 1-No. By using the time data of n, it is possible to confirm the number of appliances and the maximum usage time for each flow rate within a predetermined time.
【００１７】又、例えば時間を１日と区切ることで、流
量毎の使用器具継続最大時間を確認することができる。
これにより、継続使用時間から器具を安全に継続して使
用できる時間の算出分析に使用できる。Further, for example, by dividing the time into one day, it is possible to confirm the maximum duration of the used appliance for each flow rate.
As a result, it can be used for calculation analysis of the time during which the device can be safely and continuously used from the continuous use time.
【００１８】（流量）、（ＡＲＡ２）及びＮｏ．１〜Ｎ
ｏ．ｎの時刻データを用いることにより、同時に同一流
量での最大使用器具数を確認することができる。(Flow rate), (ARA2) and No. 1 to N
o. By using the time data of n, it is possible to simultaneously confirm the maximum number of appliances used at the same flow rate.
【００１９】（流量）とＮｏ．１の時刻データから流量
毎の使用時間分布を把握することができる。流量から使
用ガス器具を推定し、これからガス器具の普及状況を推
定できる。(Flow rate) and No. It is possible to grasp the usage time distribution for each flow rate from the time data of 1. The gas appliances used can be estimated from the flow rate, and the prevalence of gas appliances can be estimated from this.
【００２０】[0020]
【発明の効果】本発明のガス流量データ格納装置によれ
ば、単位流量通過する毎に出力されるパルスレートの低
い流量信号から流量を得て、流量の増加および減少を検
出するようにしたので、正確な流量変化を得ることがで
きる。しかも短時間で使用が終了するガス器具であって
も確実にその使用を把握することができる。又、同一流
量の変動が生じた場合順次記録することから、複数の器
具が同時に使用されていても、個々の器具の使用開始或
は終了を判定できるので、同一流量のガス器具が複数あ
る場合でも、それらガス器具を区別して記録することが
できる。According to the gas flow rate data storage device of the present invention, the flow rate is obtained from the flow rate signal with a low pulse rate output each time a unit flow rate passes, and the increase and decrease of the flow rate are detected. It is possible to obtain an accurate flow rate change. Moreover, even if the gas appliance is used up in a short time, its use can be surely grasped. In addition, when the fluctuation of the same flow rate is recorded sequentially, even if multiple appliances are used at the same time, it is possible to judge the start or end of use of each appliance. However, the gas appliances can be recorded separately.
【００２１】更に、本発明のガス流量データ格納装置で
得られる結果を用いれば、設置ガス器具や、流量毎の器
具数、最大使用時間、継続使用時間、最大使用器具数、
使用時間分布等を得ることができる。Furthermore, using the results obtained by the gas flow rate data storage device of the present invention, the installed gas appliances, the number of appliances for each flow rate, the maximum usage time, the continuous usage time, the maximum number of appliances used,
It is possible to obtain the usage time distribution and the like.
【図１】本発明のガス流量データ格納装置にかかるフロ
ーチャートである。FIG. 1 is a flow chart of a gas flow rate data storage device of the present invention.
【図２】本発明のガス流量データ格納装置が記録格納す
る表の一実施例を示す表である。FIG. 2 is a table showing an example of a table recorded and stored by the gas flow rate data storage device of the present invention.
【図３】ガス流量データ格納装置の一例を示す構成図で
ある。FIG. 3 is a configuration diagram showing an example of a gas flow rate data storage device.
【図４】流量の経時変化を示すグラフである。FIG. 4 is a graph showing a change over time in the flow rate.
２ 流量格納装置 ４ 流量計 ６ 検出手段 ８ 記録手段 ９ 管 2 flow rate storage device 4 flow meter 6 detection means 8 recording means 9 tube
───────────────────────────────────────────────────── フロントページの続き (72)発明者 横須賀 識友 埼玉県川越市霞ヶ関北５−29−１ (72)発明者 伊藤 雅彦 埼玉県越谷市川柳町４丁目245番地１ 朝 日プラザガーデンシティ新越谷837 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shiritomo Yokosuka 5-29-1, Kasumigaseki, Kawagoe City, Saitama Prefecture (72) Inventor Masahiko Ito 4-245, Kawayanagicho, Koshigaya City, Saitama Prefecture 837 Asahi Plaza Garden City Shinkoshigaya
Claims (2)
信号から順次流体の流量を計測し、該流量が安定した時
点の流量を基準として該流量から変動した流量までの間
の差を検出する検出手段と、前記流量に変動が生じたと
き該変動の発生時刻を記録するとともに該変動が増加の
場合には該変動差に対応する流量の欄の第二の器具数の
項目の値を順次加算し、該変動が減少の場合には該項目
の値を順次減算させるとともに該第二の器具数の項目の
最大値と該流量の欄の第一の器具数の項目の値とを比較
して該第二の器具数の最大値の方が大きい時には前記第
一の器具数の値を該第二の器具数の最大値に変更するよ
うにした記録手段とから構成したことを特徴とするガス
流量データ格納装置。1. A flow rate of a fluid is sequentially measured from a flow rate signal indicating that a unit amount of fluid has passed, and a difference between the flow rate and a varied flow rate is detected with reference to the flow rate at the time when the flow rate is stabilized. And a recording means for recording the occurrence time of the fluctuation when the fluctuation occurs in the flow rate, and when the fluctuation increases, the value of the item of the second device number in the flow rate column corresponding to the fluctuation difference is displayed. Sequentially add, and if the fluctuation decreases, sequentially subtract the value of the item and compare the maximum value of the item of the second number of appliances and the value of the item of the first number of appliances in the column of the flow rate. And a recording means for changing the value of the first number of instruments to the maximum value of the second number of instruments when the maximum number of the second instruments is larger. Gas flow data storage device.
信号から順次流体の流量を計測し、該流量が安定した時
点の流量を基準として該流量から変動した流量までの間
の差を検出する検出手段と、前記変動が増加の場合には
該変動の発生時刻を記録するとともに該変動差に対応す
る流量の欄の第一の器具数及び第二の器具数の項目の値
を順次加算し、かつ前記変動が減少の場合には該変動の
発生時刻を記録するとともに該変動差に対応する流量の
欄の第二の器具数の項目の値を順次減算させる記録手段
とから構成したことを特徴とする請求項１に記載のガス
流量データ格納装置。2. The flow rate of the fluid is sequentially measured from a flow rate signal indicating that a unit amount of fluid has passed, and the difference between the flow rate and the varied flow rate is detected with reference to the flow rate at the time when the flow rate becomes stable. Detecting means, and when the fluctuation is increased, the time of occurrence of the fluctuation is recorded, and the values of the items of the first device number and the second device number in the flow rate column corresponding to the fluctuation difference are sequentially added. In addition, when the fluctuation is reduced, the recording means records the occurrence time of the fluctuation and sequentially subtracts the value of the item of the second number of appliances in the flow rate column corresponding to the fluctuation difference. The gas flow rate data storage device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10033293A JPH06288808A (en) | 1993-04-02 | 1993-04-02 | Gas flow data storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10033293A JPH06288808A (en) | 1993-04-02 | 1993-04-02 | Gas flow data storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06288808A true JPH06288808A (en) | 1994-10-18 |
Family
ID=14271198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10033293A Pending JPH06288808A (en) | 1993-04-02 | 1993-04-02 | Gas flow data storage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06288808A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5597960A (en) * | 1995-06-05 | 1997-01-28 | Beaudoim; Benott | Pump station flowmeter |
| JP2002162278A (en) * | 2000-11-24 | 2002-06-07 | Ricoh Elemex Corp | Gas meter |
| JP2018194333A (en) * | 2017-05-12 | 2018-12-06 | パナソニックＩｐマネジメント株式会社 | Gas appliance management device and operation method thereof |
-
1993
- 1993-04-02 JP JP10033293A patent/JPH06288808A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5597960A (en) * | 1995-06-05 | 1997-01-28 | Beaudoim; Benott | Pump station flowmeter |
| JP2002162278A (en) * | 2000-11-24 | 2002-06-07 | Ricoh Elemex Corp | Gas meter |
| JP2018194333A (en) * | 2017-05-12 | 2018-12-06 | パナソニックＩｐマネジメント株式会社 | Gas appliance management device and operation method thereof |
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