JP2000111043A - Gas safety apparatus - Google Patents
Gas safety apparatusInfo
- Publication number
- JP2000111043A JP2000111043A JP10286241A JP28624198A JP2000111043A JP 2000111043 A JP2000111043 A JP 2000111043A JP 10286241 A JP10286241 A JP 10286241A JP 28624198 A JP28624198 A JP 28624198A JP 2000111043 A JP2000111043 A JP 2000111043A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- flow rate
- ultrasonic sensor
- zero point
- measured
- 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)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、ガス流量を計測
し、異常流量が計測された場合にはガス通路を遮断し、
ガス使用上の安全性を確保するガス保安装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention measures a gas flow rate and shuts off a gas passage when an abnormal flow rate is measured.
The present invention relates to a gas safety device for ensuring safety in using gas.
【0002】[0002]
【従来の技術】近年、ガスの使用量を計測するガスメー
タに、多量の流量が計測された場合や、通常ではありえ
ないほどの長時間使用があった場合には、異常と判定し
てガス通路を遮断し、安全性を確保する保安装置が内蔵
されたものが普及している。2. Description of the Related Art In recent years, when a gas meter for measuring the amount of gas used has measured a large amount of flow or has been used for an unusually long time, it is determined that an abnormality has occurred and the gas passage is determined. The one with a built-in security device that shuts off and ensures safety is widely used.
【0003】この種のガス保安装置の流量測定方式で
は、所定の時間内にメータを通過した体積より流量を測
定する膜式メータと、所定の時間間隔で超音波センサを
動作させて瞬時流量を測定するメータが一般的である。[0003] In this type of flow rate measurement system for a gas safety device, a membrane-type meter that measures the flow rate from the volume that has passed through the meter within a predetermined time, and an ultrasonic sensor that operates at a predetermined time interval to measure the instantaneous flow rate. Meters for measuring are common.
【0004】従来の超音波センサを利用したガス保安装
置を図3にもとづき説明する。図において、通常のガス
使用量を測定する場合、制御回路4から所定の時間間隔
で超音波センサ駆動回路3に動作信号を送り、超音波セ
ンサ1を動作させて流路2を流れているガスの瞬時流量
を測定する。そして、超音波センサ駆動回路3から返信
される瞬時流量データを基に積算ガス使用量を計測して
いる。また、計測されたガスの使用量が異常かどうかを
制御回路4で判断し、異常と判断した場合は遮断弁駆動
回路6に動作信号を送信して、遮断弁7を閉じてガスを
止める。A conventional gas safety device using an ultrasonic sensor will be described with reference to FIG. In the figure, when measuring a normal gas consumption, an operation signal is sent from the control circuit 4 to the ultrasonic sensor driving circuit 3 at a predetermined time interval, and the ultrasonic sensor 1 is operated to operate the gas flowing through the flow path 2. Measure the instantaneous flow rate. Then, the integrated gas usage is measured based on the instantaneous flow rate data returned from the ultrasonic sensor driving circuit 3. Further, the control circuit 4 determines whether or not the measured gas usage is abnormal, and when it is determined to be abnormal, sends an operation signal to the shut-off valve drive circuit 6 to close the shut-off valve 7 and stop the gas.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、超音波
センサを利用した流量計測方式では超音波センサ等の経
時変化によって零点がズレて流量計測値の誤差が徐々に
大きくなる可能性があるという課題があった。However, in the flow rate measuring method using the ultrasonic sensor, there is a problem that the zero point shifts due to a temporal change of the ultrasonic sensor and the like, and the error of the flow rate measured value may gradually increase. there were.
【0006】[0006]
【課題を解決するための手段】上記課題を解決するため
本発明ではガス未使用である状態を理論的に確認し、ガ
ス未使用状態の流量を計測して、この計測値を零点に設
定することで零点とのズレを補正する。これによって正
確な流量計測が可能になる。In order to solve the above-mentioned problems, in the present invention, a state where gas is not used is theoretically confirmed, a flow rate in a state where gas is not used is measured, and this measured value is set to a zero point. This corrects the deviation from the zero point. This enables accurate flow measurement.
【0007】[0007]
【発明の実施の形態】本発明の第1の手段によるガス保
安装置は、通常1日に数時間は必ずガス未使用の期間が
あることから、所定の期間の最低流量を記録しておくこ
とによって、ガス未使用時の流量計測値を正確に測定で
き、前記最低流量をガス未使用時のデータとして設定す
ることによって零点補正ができるようにしたものであ
る。BEST MODE FOR CARRYING OUT THE INVENTION In the gas safety device according to the first means of the present invention, since there is usually a period in which gas is not used for several hours a day, it is necessary to record the minimum flow rate in a predetermined period. Thus, the flow measurement value when gas is not used can be accurately measured, and the zero point can be corrected by setting the minimum flow rate as data when gas is not used.
【0008】本発明の第2の手段によるガス保安装置
は、一般的にガス未使用時は周囲の温度変化の影響でガ
ス使用時に比べてガス通路内の圧力が高くなることが多
いことを利用し、所定の流量以上のガスを使用している
場合のガス通路内の圧力の最大値を記録しておき、流量
計測値が所定の流量以下で、流量計測前後のガス通路内
の圧力が前記最大値以上の圧力である時に計測した流量
をガス未使用時のデータとして設定することによって零
点補正ができるようにしたものである。[0008] The gas safety device according to the second means of the present invention utilizes the fact that the pressure in the gas passage is generally higher when the gas is not used than when the gas is used due to the change in ambient temperature. Then, the maximum value of the pressure in the gas passage when using a gas having a flow rate equal to or higher than a predetermined flow rate is recorded. Zero point correction can be performed by setting the flow rate measured when the pressure is equal to or higher than the maximum value as data when gas is not used.
【0009】[0009]
【実施例】以下、本発明の実施例について図面を用いて
説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0010】(実施例1)図1は本発明の第1の手段に
よるガス保安装置を示す構成図である。基本的な構成は
従来例の説明と同じで、本実施例と従来例との差異は零
点補正手段を追加したことである。 本発明の第1の手
段による零点補正手段では、所定の期間を零点測定期間
と設定し、この期間中に超音波センサ1で計測した最低
流量をガス未使用時の流量として記録する。そして、前
記零点測定期間後に記録されたガス未使用時の流量を超
音波センサ1で測定する流量の零点として制御回路4で
設定することによって、本発明のガス保安装置の零点補
正が可能になる。(Embodiment 1) FIG. 1 is a configuration diagram showing a gas safety apparatus according to the first means of the present invention. The basic configuration is the same as that of the description of the conventional example, and the difference between the present embodiment and the conventional example is that zero point correcting means is added. In the zero point correcting means according to the first means of the present invention, a predetermined period is set as a zero point measuring period, and a minimum flow rate measured by the ultrasonic sensor 1 during this period is recorded as a flow rate when gas is not used. Then, by setting the flow rate when the gas is not used recorded after the zero point measurement period as the zero point of the flow rate measured by the ultrasonic sensor 1 in the control circuit 4, the zero point correction of the gas safety apparatus of the present invention becomes possible. .
【0011】(実施例2)図2は本発明の第2の手段に
よるガス保安装置を示す構成図である。基本的な構成は
従来例の説明と同じで、本実施例と従来例との差異はガ
ス通路の圧力を測定する圧力センサと零点補正手段を追
加したことである。本発明の第2の手段による零点補正
手段では、まず、通常のガス使用時にガス通路内の圧力
を圧力センサ8で測定し、測定した圧力の最大値を記録
しておく。つぎに、零点補正期間中に前記最大値以上の
圧力を計測した時、超音波センサ1で流路2内の流量を
測定し、測定した値を超音波センサ1の零点として制御
回路4で設定することによって、本発明のガス保安装置
の零点補正が可能になる。また、測定後のガス通路の圧
力を再度測定し、ガスが測定中に使用されていないこと
を確認している。(Embodiment 2) FIG. 2 is a structural view showing a gas safety apparatus according to the second means of the present invention. The basic configuration is the same as that of the conventional example. The difference between the present embodiment and the conventional example is that a pressure sensor for measuring the pressure in the gas passage and a zero point correcting means are added. In the zero point correcting means according to the second means of the present invention, first, the pressure in the gas passage is measured by the pressure sensor 8 during normal gas use, and the maximum value of the measured pressure is recorded. Next, when a pressure equal to or higher than the maximum value is measured during the zero point correction period, the flow rate in the flow path 2 is measured by the ultrasonic sensor 1, and the measured value is set as the zero point of the ultrasonic sensor 1 by the control circuit 4. By doing so, the zero point correction of the gas safety device of the present invention becomes possible. Further, the pressure in the gas passage after the measurement was measured again to confirm that the gas was not used during the measurement.
【0012】[0012]
【発明の効果】以上のように本発明の第1の手段による
ガス保安装置によれば、ガス未使用時の流量を正確に計
測できるため、零点補正が可能になり、超音波センサの
経時変化等の影響を受けることなく、正確な流量計測が
可能になる。As described above, according to the gas safety device according to the first means of the present invention, the flow rate when the gas is not used can be accurately measured, so that the zero point can be corrected, and the ultrasonic sensor can change over time. It is possible to measure the flow rate accurately without being affected by such factors.
【0013】本発明の第2の手段によるガス保安装置に
よれば、第1の手段による効果に加えて、ガスの配管漏
れの影響を受けることもないため、さらに正確な零点補
正が可能になる。According to the gas safety device of the second means of the present invention, in addition to the effect of the first means, there is no influence of gas pipe leakage, so that more accurate zero point correction can be performed. .
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施例1におけるガス保安装置を示す
構成図FIG. 1 is a configuration diagram illustrating a gas security device according to a first embodiment of the present invention.
【図2】本発明の実施例2におけるガス保安装置を示す
構成図FIG. 2 is a configuration diagram illustrating a gas safety device according to a second embodiment of the present invention.
【図3】従来のガス保安装置を示す構成図FIG. 3 is a configuration diagram showing a conventional gas safety device.
1 超音波センサ 2 流路 3 超音波センサ駆動回路 4 制御回路 5 零点補正手段 6 遮断弁駆動回路 7 遮断弁 8 圧力センサ DESCRIPTION OF SYMBOLS 1 Ultrasonic sensor 2 Flow path 3 Ultrasonic sensor drive circuit 4 Control circuit 5 Zero correction means 6 Shutoff valve drive circuit 7 Shutoff valve 8 Pressure sensor
Claims (2)
の流量を測定する超音波センサと、この超音波センサを
駆動する超音波センサ駆動回路と、所定の期間の最低流
量を記録しておき、前記最低流量をガス未使用時のデー
タとして設定する零点補正手段と、異常時にガス通路を
遮断する遮断弁と、前記遮断弁を動作させるための遮断
弁駆動回路と、前記遮断弁と前記超音波センサを制御す
る制御回路を備えたガス保安装置。1. A flow path for flowing a gas, an ultrasonic sensor for measuring a flow rate of the gas flowing through the flow path, an ultrasonic sensor driving circuit for driving the ultrasonic sensor, and recording a minimum flow rate for a predetermined period. In addition, zero point correction means for setting the minimum flow rate as data when gas is not used, a shutoff valve for shutting off a gas passage when an abnormality occurs, a shutoff valve driving circuit for operating the shutoff valve, and the shutoff valve And a control circuit for controlling the ultrasonic sensor.
の流量を測定する超音波センサと、この超音波センサを
駆動する超音波センサ駆動回路と、ガス保安装置内のガ
ス通路の圧力を測定する圧力センサと、所定の流量以上
のガスを使用している場合のガス通路内の圧力の最大値
を記録しておき、流量計測値が所定の流量以下で、流量
計測前後のガス通路内の圧力が前記最大値以上の圧力で
ある時に計測した流量をガス未使用時のデータとして設
定する零点補正手段と、異常時にガス通路を遮断する遮
断弁と、前記遮断弁を動作させるための遮断弁駆動回路
と、前記遮断弁と前記超音波センサを制御する制御回路
を備えたガス保安装置。2. A flow path for flowing a gas, an ultrasonic sensor for measuring a flow rate of the gas flowing through the flow path, an ultrasonic sensor driving circuit for driving the ultrasonic sensor, and a gas passage in the gas security device. Record the pressure sensor that measures the pressure and the maximum value of the pressure in the gas passage when using a gas with a flow rate equal to or higher than the predetermined flow rate. Zero point correction means for setting the flow rate measured when the pressure in the passage is equal to or higher than the maximum value as data when the gas is not used, a shutoff valve for shutting off the gas passage when an abnormality occurs, and for operating the shutoff valve And a control circuit for controlling the shut-off valve and the ultrasonic sensor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28624198A JP3817934B2 (en) | 1998-10-08 | 1998-10-08 | Gas security device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28624198A JP3817934B2 (en) | 1998-10-08 | 1998-10-08 | Gas security device |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000111043A true JP2000111043A (en) | 2000-04-18 |
JP3817934B2 JP3817934B2 (en) | 2006-09-06 |
Family
ID=17701819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28624198A Expired - Fee Related JP3817934B2 (en) | 1998-10-08 | 1998-10-08 | Gas security device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3817934B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010218888A (en) * | 2009-03-17 | 2010-09-30 | Jx Nippon Oil & Energy Corp | Fuel cell system |
JP2013251279A (en) * | 2013-09-18 | 2013-12-12 | Jx Nippon Oil & Energy Corp | Fuel cell system |
-
1998
- 1998-10-08 JP JP28624198A patent/JP3817934B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010218888A (en) * | 2009-03-17 | 2010-09-30 | Jx Nippon Oil & Energy Corp | Fuel cell system |
JP2013251279A (en) * | 2013-09-18 | 2013-12-12 | Jx Nippon Oil & Energy Corp | Fuel cell system |
Also Published As
Publication number | Publication date |
---|---|
JP3817934B2 (en) | 2006-09-06 |
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