JP2003307442A - Flow rate measuring system - Google Patents
Flow rate measuring systemInfo
- Publication number
- JP2003307442A JP2003307442A JP2002112993A JP2002112993A JP2003307442A JP 2003307442 A JP2003307442 A JP 2003307442A JP 2002112993 A JP2002112993 A JP 2002112993A JP 2002112993 A JP2002112993 A JP 2002112993A JP 2003307442 A JP2003307442 A JP 2003307442A
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- Prior art keywords
- flow rate
- measurement
- accuracy
- measuring
- measurement accuracy
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- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、流体流量の遠隔計
測を行う流量計測システムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate measuring system for remotely measuring a fluid flow rate.
【０００２】[0002]
【従来の技術】従来、この種の流量計測システムは、遠
く離れた場所に在るガスなどの流体を計る流量計に計測
開始や終了の指示をしたり、計測値の送受信を行うテレ
メーターとして広く知られている。又ガスメーターとし
ては、例えば、特開昭６３−１２７０１７号公報に記載
されているようにガスの使用状態を監視し、異常発生を
無線通信で報知したり、ガスの使用状態の異常判定条件
を無線で確認したり、変更したり、学習の指示などをす
るものがあった。図９にこの種の無線通信装置付き流量
計測装置のブロック図を示す。2. Description of the Related Art Conventionally, this kind of flow rate measuring system has been used as a telemeter for instructing a flow meter for measuring a fluid such as a gas located at a distant place to start and end the measurement, and for transmitting and receiving a measured value. Widely known. As a gas meter, for example, as described in Japanese Patent Application Laid-Open No. 63-127017, a gas usage state is monitored and an abnormality is reported by wireless communication, or an abnormality determination condition of the gas usage state is wirelessly determined. There was something to check, change, and give instructions for learning. FIG. 9 shows a block diagram of a flow rate measuring device with a wireless communication device of this type.
【０００３】図９において、流量計測装置の計測指示部
１は指示手段２と、無線通信手段３で構成されており、
計測部４は無線通信手段５と流量計６と流量異常判定手
段７と異常判定条件記憶手段８とで構成されている。９
は遮断手段である。In FIG. 9, the measurement instructing section 1 of the flow rate measuring device comprises an instructing means 2 and a wireless communication means 3,
The measuring unit 4 includes a wireless communication unit 5, a flow meter 6, a flow rate abnormality determination unit 7, and an abnormality determination condition storage unit 8. 9
Is a blocking means.
【０００４】指示手段２から計測開始信号が無線通信手
段３により送信されると、遠隔地にある計測部４は、無
線通信手段５で受信し、流量計測手段６で流量を計測
し、計測値を無線通信手段５に返信して、計測指示部１
は計測値を受信する。また流量計測手段６で計測された
流量は流量異常判定手段７で異常判定条件記憶手段８に
記憶された判定条件と比較され、異常と判定した時は、
流体の遮断手段９を動作させた後、無線通信手段５を介
して計測指示部１へ異常の発生を報知する。更に、計測
指示部１からガスの流量異常判定条件の確認信号、変更
信号、学習信号などが送信されると計測部４は無線通信
手段５を介して異常判定条件記憶手段８に記憶されてい
る異常判定条件を返信したり、書き換えたり、一定期間
の正常な流量変化状態を学習した後、判定条件を実流量
に適合した値に変更したりするように動作する。これら
の動作は遠隔地又は人間が近寄れない場所での流量の計
測、及び流量の安全状態の監視と保護動作の実施を行う
ものである。When a measurement start signal is transmitted from the instructing means 2 by the wireless communication means 3, the measuring section 4 at a remote place receives it by the wireless communication means 5, measures the flow rate by the flow rate measuring means 6, and measures the measured value. To the wireless communication means 5, and the measurement instruction unit 1
Receives measurements. Further, the flow rate measured by the flow rate measuring means 6 is compared with the determination condition stored in the abnormality determination condition storage means 8 by the flow rate abnormality determining means 7, and when it is determined to be abnormal,
After operating the fluid cutoff means 9, the occurrence of an abnormality is notified to the measurement instruction section 1 via the wireless communication means 5. Furthermore, when the measurement instruction unit 1 transmits a confirmation signal, a change signal, a learning signal, etc. of the gas flow rate abnormality determination condition, the measurement unit 4 is stored in the abnormality determination condition storage unit 8 via the wireless communication unit 5. The operation is performed such that the abnormality determination condition is returned or rewritten, or after the normal flow rate change state for a certain period is learned, the determination condition is changed to a value suitable for the actual flow rate. These operations are to measure the flow rate at a remote place or a place where human beings cannot approach, monitor the safe state of the flow rate, and perform a protective action.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら前記従来
の構成では、流量の大きさに応じた計測精度で高精度の
計測を行うことが出来ない。又、流体の流れの脈動の有
無の判定と、脈動状況に適合する計測精度で正確な計測
を能率良くおこなうことが出来ないという課題を有して
いた。However, with the above-mentioned conventional configuration, it is not possible to perform highly accurate measurement with measurement accuracy according to the magnitude of the flow rate. Further, there is a problem that it is not possible to efficiently determine the presence or absence of pulsation of the fluid flow and to perform accurate measurement with measurement accuracy that matches the pulsation situation.
【０００６】本発明は、前記従来の課題を解決するもの
で、無線通信を利用して、流量又は脈動に応じた計測精
度を指示して、過剰な精度又は精度不良での流量計測を
防ぎ、常に的確な計測精度で流量を正確に測定できる様
にした流量計測システムを提供することを目的とする。[0006] The present invention solves the above-mentioned conventional problems by using wireless communication to instruct measurement accuracy according to flow rate or pulsation, and prevent flow rate measurement with excessive accuracy or inaccuracy. It is an object of the present invention to provide a flow rate measuring system capable of always measuring a flow rate accurately with an accurate measurement accuracy.
【０００７】[0007]
【課題を解決するための手段】前記従来の課題を解決す
るために、本発明の流量計測システムは、計測指示部に
計測精度を指示する無線指示手段と、無線通信手段を設
け、計測部には計測精度を必要な値に変更する計測精度
変更手段と計測精度が可変できる流量計測手段とを設け
たものである。In order to solve the above-mentioned conventional problems, the flow rate measuring system of the present invention is provided with a wireless instructing unit for instructing the measurement accuracy in the measuring instructing unit and a wireless communication unit, and the measuring unit is provided with Is provided with a measurement accuracy changing means for changing the measurement accuracy to a required value and a flow rate measuring means capable of varying the measurement accuracy.
【０００８】これによって、無線指示手段は流量の大き
さに適する計測精度を、無線通信手段により計測精度変
更手段に指示して測定時の計測精度を変更するので、流
量計測手段が適正な精度で流量を測定することが出来
る。As a result, the wireless instructing means instructs the measuring accuracy changing means by the wireless communication means to change the measuring accuracy suitable for the magnitude of the flow rate. The flow rate can be measured.
【０００９】[0009]
【発明の実施の形態】請求項１に記載の発明は、流量計
測システムの計測指示部は計測精度を指示する無線指示
手段と無線通信手段を備え、計測部には無線通信手段と
計測精度変更手段と計測精度が可変できる流量計測手段
とを備えることにより、計測指示側で日常的に繰り返さ
れる流量変化のパターン、或いは突発的な変化で予想さ
れる流量に適合した計測精度を指示すると、無線通信で
遠く離れた場所又は人間が容易に近づけない環境にある
計測部の計測精度を適切な値に変更して流量測定ができ
るものとなる。The invention according to claim 1 is such that the measurement instructing section of the flow rate measuring system comprises wireless instructing means and wireless communication means for instructing measurement accuracy, and the measuring section includes wireless communication means and measurement accuracy changing. By providing a means and a flow rate measuring means capable of varying the measurement accuracy, the measurement instruction side indicates the measurement accuracy suitable for the flow rate pattern that is repeated on a daily basis or the flow rate expected by a sudden change. The flow rate can be measured by changing the measurement accuracy of the measurement unit in a place far away by communication or in an environment where humans cannot easily approach it to an appropriate value.
【００１０】請求項２に記載の発明は、請求項１記載の
流量計測システムの計測指示部に、計測部で測定した流
量値により計測精度を選定する計測精度選定手段を加え
たので、流量測定を１回実施した後、実流量の変化に応
じて計測精度を自動的に最適値に設定して的確な精度で
流量を測定するものとなる。According to the second aspect of the present invention, the flow rate measurement system includes the measurement instruction section of the flow rate measurement system as described above, further comprising a measurement precision selecting means for selecting the measurement precision based on the flow rate value measured by the measurement section. After performing once, the measurement accuracy is automatically set to the optimum value according to the change in the actual flow rate, and the flow rate is measured with an appropriate accuracy.
【００１１】請求項３に記載の発明は、請求項１記載の
流量計測システムの計測指示部に、脈動確認手段と脈動
判定手段を加えたので、計測精度を変化させた複数回の
測定で流量の脈動の有無を調べ、脈動時には脈動の平均
流量を測定するのに適した計測精度を計測部へ指示し
て、脈動時におけるサイクル的な流量変化の影響を除外
した的確な計測精度で流量を測定するものとなる。According to a third aspect of the present invention, since the pulsation confirmation means and the pulsation determination means are added to the measurement instruction section of the flow rate measurement system according to the first aspect, the flow rate can be measured a plurality of times while changing the measurement accuracy. Check the presence or absence of pulsation, and instruct the measurement unit at a measurement accuracy suitable for measuring the average flow rate of pulsation during pulsation, and measure the flow rate with accurate measurement accuracy excluding the effect of cyclic flow rate change during pulsation. It becomes something to measure.
【００１２】請求項４に記載の発明は請求項１〜３記載
の流量計測手段としてシングアラウンド式超音波流量計
測手段を用いて流量計測時のシングアラウンド回数を流
量に応じて変更し、的確な計測精度で流量を測定するも
のとなる。According to a fourth aspect of the present invention, a singaround type ultrasonic flow rate measuring means is used as the flow rate measuring means according to the first to third aspects, and the number of singaround times at the time of measuring the flow rate is changed in accordance with the flow rate, and it is possible to accurately The flow rate is measured with measurement accuracy.
【００１３】[0013]
【実施例】以下本発明の実施例について、図面を参照し
ながら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】（実施例１）図１、図２は本発明における
流量計測システムのブロック図と、動作を示すフローチ
ャートであり、図３は本発明の流量計測手段に用いるこ
とが出来る計測精度が変更可能な流量計測手段の一例で
あるシングアラウンド式超音波流量計測手段のブロック
図である。ここでいうシングアラウンドとは、超音波計
測するパスを何回も繰返し通過することを意味する。(Embodiment 1) FIGS. 1 and 2 are a block diagram of a flow rate measuring system according to the present invention and a flow chart showing the operation thereof, and FIG. 3 shows a change in measurement accuracy that can be used in the flow rate measuring means of the present invention. It is a block diagram of a sing-around type ultrasonic flow rate measuring means which is an example of a possible flow rate measuring means. The sing-around here means to repeatedly pass through the ultrasonic measurement path.
【００１５】図１において、１１は流量計測の精度を指
示する無線指示手段であり、１２は計測精度が可変でき
る流量計測手段、１３は前記流量計測手段１２の計測精
度を調節する計測精度変更手段である。In FIG. 1, 11 is a wireless instructing means for instructing the accuracy of flow rate measurement, 12 is a flow rate measuring means capable of varying the measurement accuracy, and 13 is a measurement accuracy changing means for adjusting the measurement accuracy of the flow rate measuring means 12. Is.
【００１６】図２において、ステップ２１は開始命令、
ステップ２２は計測精度送信命令、ステップ２３は計測
精度受信命令、ステップ２４は流量の計測命令、ステッ
プ２５は計測値送信命令、ステップ２６は計測値受信命
令ある。In FIG. 2, step 21 is a start command,
Step 22 is a measurement accuracy transmission command, step 23 is a measurement accuracy reception command, step 24 is a flow rate measurement command, step 25 is a measurement value transmission command, and step 26 is a measurement value reception command.
【００１７】図３において、３０は前記計測精度が可変
できる流量計測手段１２の実施例としてのシングアラウ
ンド式超音波流量計測手段である。３１は流路、３２は
第１の超音波振動子、３３は第２の超音波振動子、３４
は送信部、３５は受信部、３６は切替接点ＡＢＣＤを有
する切替部、３７は切替制御部、３８は計時部、３９は
流量演算部である。また流路３１内の流体の流れ方向を
矢印で示す。In FIG. 3, reference numeral 30 is a sing-around ultrasonic flow rate measuring means as an embodiment of the flow rate measuring means 12 capable of varying the measurement accuracy. 31 is a flow path, 32 is a first ultrasonic transducer, 33 is a second ultrasonic transducer, 34
Is a transmitting unit, 35 is a receiving unit, 36 is a switching unit having a switching contact ABCD, 37 is a switching control unit, 38 is a time measuring unit, and 39 is a flow rate calculating unit. The flow direction of the fluid in the channel 31 is indicated by an arrow.
【００１８】以上の様に構成された流量計測システムに
ついて，以下その動作、作用の説明をする。The operation and action of the flow rate measuring system configured as described above will be described below.
【００１９】まず、無線指示手段１１で予想される流量
に適した計測精度がシングアラウンド式超音波流量計測
手段３０のシングアラウンド回数ｎの形で決められ、無
線指示手段１１より、無線通信手段３、５を経由して計
測精度変更手段１３に伝達され、シングアラウンド式超
音波流量計測手段３０の計時部３８へシングアラウンド
回数ｎをセットする。計時部３８は切替制御部３７に信
号を送り、切替部３６の回路がＡとＤ、及びＢとＣが接
続される様に制御し、送信部３４から数サイクルの期間
だけ送信信号を発生させる。前記送信信号は切替部３６
を経由して振動子３２へ送られ、超音波に変換されて、
流路３１を流れる流体の流れＶで早められて流れの順方
向に伝播し、振動子３３で受信されて電気信号に変換さ
れ切替部３６を通り受信部３５を経由して、計時部３８
へ伝達される。First, the measurement accuracy suitable for the flow rate expected by the wireless instructing means 11 is determined in the form of the number of sing-around times n of the singaround ultrasonic flow rate measuring means 30, and the wireless instructing means 11 causes the wireless communication means 3 to operate. 5 is transmitted to the measurement accuracy changing means 13 and the singaround number of times n is set in the timekeeping section 38 of the singaround ultrasonic flow rate measuring means 30. The clock unit 38 sends a signal to the switching control unit 37, controls the circuit of the switching unit 36 so that A and D, and B and C are connected, and causes the transmission unit 34 to generate a transmission signal for a period of several cycles. . The transmission signal is sent to the switching unit 36.
Is transmitted to the transducer 32 via the
It is accelerated by the flow V of the fluid flowing in the flow path 31 and propagates in the forward direction of the flow, and is received by the transducer 33 and converted into an electric signal, which passes through the switching unit 36 and the receiving unit 35, and then the timing unit 38.
Transmitted to.
【００２０】計時部３８は受信すると１回カウントし、
その後、送信部３４へ次の送信信号を発生する様に信号
を送る。同様にして超音波が流体中を通過して計測精度
変更手段１３から入力されたシングアラウンド回数ｎに
なるまで繰返し行われ、その間に要した時間Ｔ１を計測
する。この時、一回の伝搬時間をｔ１とすると、次式の
関係が成り立つ。When the timer section 38 receives, it counts once,
Then, a signal is sent to the transmission unit 34 so as to generate the next transmission signal. Similarly, ultrasonic waves are repeatedly passed through the fluid until the number of sing-around times n input from the measurement accuracy changing unit 13 is reached, and the time T1 required during that time is measured. At this time, if the propagation time of one time is t1, the following relationship is established.
【００２１】Ｔ１＝（ｎ）ｘ（ｔ１） （１）
もし、シングアラウンド動作が繰返し毎に送信するまで
に、所定の時間間隔を有する場合であれば、その時間間
隔を差し引いた値がＴ１として用いられる。T1 = (n) x (t1) (1) If the sing-around operation has a predetermined time interval before transmitting every repetition, the value obtained by subtracting the time interval is T1. Used.
【００２２】次に計時部３８は切替制御部３７を操作し
て切替部３６の回路がＡとＣ、及びＢとＤを接続する様
に動作して送信部３４から数サイクルの期間だけ送信信
号を発生させる。送信信号は振動子３３へ伝達して、超
音波となり流体の流れＶと逆方向に、流速で遅らされて
伝達し、振動子３２で電気信号に変換され、切替部３
６、受信部３５を経由して計時部３８へ伝達される。そ
して計時部３８は１回カウントすると、また再び送信部
３４から送信信号を発生させる。同様にして流体の流れ
と逆方向に向かう超音波がｎ回伝播する時間Ｔ２が計測
される。この時、一回の伝搬時間をｔ１とすると、次式
の関係が成り立つ。Next, the timer unit 38 operates the switching control unit 37 so that the circuit of the switching unit 36 operates so as to connect A and C, and B and D, and the transmission signal is transmitted from the transmission unit 34 for a period of several cycles. Generate. The transmission signal is transmitted to the vibrator 33, becomes an ultrasonic wave, is transmitted in the direction opposite to the flow V of the fluid with a flow velocity being delayed, is converted into an electric signal by the vibrator 32, and is switched by the switching unit 3
6. The information is transmitted to the time counting unit 38 via the receiving unit 35. When the timer 38 counts once, the transmitter 34 again generates a transmission signal. Similarly, the time T2 during which the ultrasonic wave traveling in the direction opposite to the fluid flow propagates n times is measured. At this time, if the propagation time of one time is t1, the following relationship is established.
【００２３】Ｔ２＝（ｎ）ｘ（ｔ２） （２）
いま、Ｌを２個の振動子間の距離、θを測定すべき流れ
と超音波伝播経路Ｐとのなす角度とすると、流速ｖは次
式により算出される。T2 = (n) x (t2) (2) Now, letting L be the distance between the two transducers and θ be the angle between the flow to be measured and the ultrasonic wave propagation path P, the flow velocity v is It is calculated by the following formula.
【００２４】
ｖ＝（Ｌ／２ｃｏｓθ）（（１／ｔ１）―（１／ｔ２）） （３）
このときｔ１、ｔ２はそれぞれ（１）、（２）式より求
められる。この場合、時間を計測するクロックが一定で
あるとすると、シングアラウンド回数ｎを多くし、Ｔ
１，Ｔ２の時間を長く計るようにすればするほど、ｔ
１、ｔ２の精度は向上する。すなわち、高精度の計測が
できることになる。V = (L / 2cos θ) ((1 / t1) − (1 / t2)) (3) At this time, t1 and t2 are obtained from the equations (1) and (2), respectively. In this case, assuming that the clock for measuring the time is constant, the number of sing-around times n is increased and T
The longer the time of 1 and T2 is, the more t
The accuracy of 1 and t2 is improved. That is, highly accurate measurement can be performed.
【００２５】時間Ｔ１とＴ２は流量演算部３９へ送られ
て、（１）、（２）、（３）式により流体の流速ｖが算
出される。そして平均流速を求めるための補正係数と流
路の断面積とを乗じて流量が算出される。The times T1 and T2 are sent to the flow rate calculator 39, and the flow velocity v of the fluid is calculated by the equations (1), (2) and (3). Then, the flow rate is calculated by multiplying the correction coefficient for obtaining the average flow velocity by the cross-sectional area of the flow path.
【００２６】以上のように、本実施例においては流量計
測システムの計測指示部１に計測精度の無線指示手段１
１を設け、計測部４に計測精度が変更可能な流量計測手
段１２としてシングアラウンド式超音波流量計測手段３
０と計測精度変更手段１３を設けて両者を無線通信手段
３、５で結ぶことにより被測定流量に適した計測精度を
決めるシングアラウンド回数ｎを計測指示部１から計測
部４へ無線通信で送り、流量測定を行うこととなり遠隔
地又は人間が容易に接近できない環境にある流量計測場
所で被測定流量に適した計測精度で流量測定をすること
が出来る。As described above, in the present embodiment, the measurement instructing section 1 of the flow rate measuring system includes the wireless instructing means 1 for measuring accuracy.
1, and a sing-around ultrasonic flow rate measuring means 3 is provided as the flow rate measuring means 12 whose measurement accuracy is changeable in the measuring section 4.
0 and the measurement accuracy changing means 13 are provided, and the wireless communication means 3 and 5 are connected to each other to send the sing-around number n that determines the measurement accuracy suitable for the measured flow rate from the measurement instructing unit 1 to the measuring unit 4 by wireless communication. Since the flow rate is measured, the flow rate can be measured with the measurement accuracy suitable for the measured flow rate at a flow rate measurement place in a remote place or an environment where humans cannot easily approach.
【００２７】（実施例２）図４は本発明の第２の実施例
における流量計測システムのブロック図であり、図５は
動作のフローチャートを示すものである。図６は本発明
の流量計測手段４２の一実施例としてのシングアラウン
ド式超音波流量計測手段のブロック図である。(Embodiment 2) FIG. 4 is a block diagram of a flow rate measuring system in a second embodiment of the present invention, and FIG. 5 is a flow chart of the operation. FIG. 6 is a block diagram of a sing-around type ultrasonic flow rate measuring means as an embodiment of the flow rate measuring means 42 of the present invention.
【００２８】図４において４１は精度選定手段であり、
４２は流量計測値に加えて精度情報を送信する機能を加
えた流量計測手段である。図５においてステップ５４は
所望計測精度判断命令、ステップ５５は計測精度低下命
令、ステップ５６は計測精度向上命令、ステップ５７は
計測値採用命令である。図６において６０はシングアラ
ウンド式超音波流量計測手段、６１は精度情報手段であ
る。In FIG. 4, 41 is an accuracy selecting means,
Reference numeral 42 is a flow rate measuring means having a function of transmitting accuracy information in addition to the flow rate measurement value. In FIG. 5, step 54 is a desired measurement accuracy determination command, step 55 is a measurement accuracy reduction command, step 56 is a measurement accuracy improvement command, and step 57 is a measured value adoption command. In FIG. 6, reference numeral 60 is a sing-around ultrasonic flow rate measuring means, and 61 is accuracy information means.
【００２９】実施例１の構成と異なるところは計測指示
部１に計測部４からの精度情報を受けて無線指示手段１
１に計測精度変更を指示する精度選定手段４１を設け、
計測部の流量計測手段１２に代えて計測値とその精度情
報を合わせて出力する流量計測手段４２を設けた点であ
る。The difference from the configuration of the first embodiment is that the measurement instructing section 1 receives accuracy information from the measuring section 4 and the wireless instructing section 1
1 is provided with accuracy selecting means 41 for instructing measurement accuracy change,
The point is that, instead of the flow rate measuring means 12 of the measuring unit, a flow rate measuring means 42 for outputting the measured value and its accuracy information together is provided.
【００３０】以上のように構成された流量計測装置につ
いて、以下その動作、作用を説明する。The operation and action of the flow rate measuring device configured as described above will be described below.
【００３１】計測指示部１の無線指示手段１１は開始命
令５１で標準的な計測精度をステップ５２の計測精度送
信命令により無線通信手段３で送信する。計測部４の無
線通信手段５は、これを受けて計測精度変更手段１３へ
伝え、計測精度変更手段１３は流量計測手段４２の計測
精度を前記標準的な値に設定し、流量計測手段４２が流
量計測を行った後、無線通信手段５から流量計測値と精
度情報を送信する。無線通信手段３は計測値と精度情報
を図５のフローチャートのステップ５３で受信し精度選
定手段４１へ伝える。精度選定手段４１は予め設定して
ある所望計測精度であるかの判定５４を行い所望以上の
精度であれば、計測精度低下５５の作用を無線指示手段
１１で行わせ、計測部４へステップ５２で送る。又精度
情報が所望以下の精度であれば計測精度向上５６の作用
を無線指示手段１１で行わせて計測部４へ送り流量計測
を行う。以上の動作が繰り返されて、精度情報である計
測精度が所望通りであれば計測値採用命令５７へ移行す
る。この様にして、計測精度変更手段１３に所望の計測
精度が設定され、本計測が行われる。The radio instructing means 11 of the measurement instructing section 1 transmits the standard measurement accuracy by the start instruction 51 by the radio communication means 3 by the measurement accuracy transmitting instruction of step 52. The wireless communication means 5 of the measuring unit 4 receives this and transmits it to the measurement accuracy changing means 13, and the measurement accuracy changing means 13 sets the measurement accuracy of the flow rate measuring means 42 to the standard value, and the flow rate measuring means 42 After measuring the flow rate, the wireless communication means 5 transmits the flow rate measurement value and the accuracy information. The wireless communication means 3 receives the measured value and accuracy information in step 53 of the flowchart of FIG. The accuracy selecting means 41 makes a determination 54 as to whether or not the desired measurement accuracy is set in advance, and if the accuracy is higher than the desired accuracy, the wireless instruction means 11 causes the measurement accuracy decrease 55 to be performed, and the measuring section 4 is caused to perform step 52. Send by. If the accuracy information is less than the desired accuracy, the wireless instruction means 11 is caused to perform the operation of the measurement accuracy improvement 56, and the flow rate measurement is performed to the measurement unit 4. The above operation is repeated, and if the measurement accuracy, which is the accuracy information, is as desired, the process proceeds to the measurement value adoption command 57. In this way, the desired measurement accuracy is set in the measurement accuracy changing means 13, and the main measurement is performed.
【００３２】流量計測値と精度情報を送信する機能を加
えた流量計測手段４２として図６に示すシングアラウン
ド式超音波流量計測手段６０を用いる場合、ステップ５
２で計測側から送信される前記精度情報は無線通信手段
３へ出力される。前記精度情報の送信は精度選定手段１
３に設定した所望計測精度と一致するまで繰返し計測精
度を変えて流量測定が行われる。When the sing-around ultrasonic flow rate measuring means 60 shown in FIG. 6 is used as the flow rate measuring means 42 having the function of transmitting the flow rate measurement value and the accuracy information, step 5
The accuracy information transmitted from the measurement side in 2 is output to the wireless communication means 3. The accuracy information is transmitted by the accuracy selecting means 1
The flow rate measurement is performed while changing the measurement accuracy repeatedly until it matches the desired measurement accuracy set to 3.
【００３３】以上のように、本実施例においては計測指
示部１に精度選定手段４１を設け、計測部４に精度情報
を出力する流量計測手段４２を設けた構成とすることに
より、計測指示部１は計測の度に精度情報を得て流量が
変化すれば流量計測手段４２の精度を変化させることに
なり、計測中に流量が変化しても自動的に所望の精度で
計測が出来る。As described above, in the present embodiment, the measurement instructing section 1 is provided with the accuracy selecting means 41, and the measuring section 4 is provided with the flow rate measuring means 42 for outputting the accuracy information. With No. 1, if the accuracy information is obtained at each measurement and the flow rate changes, the accuracy of the flow rate measuring means 42 changes, and even if the flow rate changes during measurement, measurement can be automatically performed with the desired accuracy.
【００３４】（実施例３）図７は本発明の第３の実施例
の流量計測装置のブロック図であり、図８は動作を示す
フローチャートを示すものである。(Third Embodiment) FIG. 7 is a block diagram of a flow rate measuring apparatus according to a third embodiment of the present invention, and FIG. 8 is a flow chart showing the operation.
【００３５】図７において７１は脈動確認手段であり、
７２は入力した流量計測値より脈動の有無を判定し、脈
動ありのときは計測精度の変更を指示する脈動判定手段
である。図８においてステップ８２は計測状況把握支持
命令、ステップ８３は脈動判定命令、ステップ８４は計
測のインターバル命令、ステップ８５は計測精度送信命
令、ステップ８６は計測値受信命令である。In FIG. 7, 71 is a pulsation confirmation means,
Reference numeral 72 denotes a pulsation determination means for determining the presence or absence of pulsation based on the input flow rate measurement value and, when there is pulsation, instructing to change the measurement accuracy. In FIG. 8, step 82 is a measurement status grasping support command, step 83 is a pulsation determination command, step 84 is a measurement interval command, step 85 is a measurement accuracy transmission command, and step 86 is a measurement value reception command.
【００３６】実施例１の構成と異なるところは計測指示
部１に脈動確認手段７１と脈動判定手段７２を設けた点
である。The difference from the configuration of the first embodiment is that the measurement instruction section 1 is provided with a pulsation confirmation means 71 and a pulsation determination means 72.
【００３７】以上のように構成された流量計測装置につ
いて、以下その動作、作用を説明する。The operation and action of the flow rate measuring device configured as described above will be described below.
【００３８】ステップ８１で開始命令を受けた脈動確認
手段７１はステップ８２で計測状況把握指示信号を精度
選定手段４１へ送り、精度選定手段４１は計測精度が異
なる複数の計測を行わせる計測状況把握指示信号を無線
指示手段１１及び無線通信手段３を通じて計測部４へ送
る。計測部４は送られてきた計測精度で複数回流量計測
を行い、計測指示部１へ流量計測値と計測精度を送る。
指示側計測部１の脈動判定手段７２は受信した前記複数
回流量計測値のばらつきと予め定めた判定閾値と比較
し、判定閾値以下であるときは流量の脈動なしと判断し
て脈動確認手段７１へ信号を送り、脈動確認手段７１は
ステップ８４で予め定めた時間休止し、再び計測状況把
握確認信号を送る。また脈動判定手段７２は前記ステッ
プ８３で前記複数回流量計測値のばらつきが予め定めた
判定閾値以上であるときは流量に脈動ありと判断して、
複数回の計測値の最大値と最小値との平均を計算し、平
均値に最も近い流量を計測した計測精度を選んで精度選
定手段４１へ伝達する。そして精度選定手段４１はステ
ップ８５で脈動時の測定に適した前記計測精度を無線指
示手段１１及び無線通信手段３を介して計測部へ送信す
る。計測精度変更手段１３は計測指示部１から送られて
きた計測精度で流量計測手段４２を動作させ、本格的な
流量測定を行う。The pulsation confirming means 71 which has received the start command in step 81 sends a measurement situation grasping instruction signal to the precision selecting means 41 in step 82, and the precision selecting means 41 grasps the measurement situation to make a plurality of measurements with different measurement precisions. The instruction signal is sent to the measurement unit 4 through the wireless instruction means 11 and the wireless communication means 3. The measurement unit 4 measures the flow rate multiple times with the sent measurement accuracy, and sends the flow rate measurement value and the measurement accuracy to the measurement instruction unit 1.
The pulsation determining means 72 of the instructing side measurement unit 1 compares the variation of the received flow rate measurement values at a plurality of times with a predetermined determination threshold value. Then, the pulsation confirmation means 71 pauses for a predetermined time in step 84, and again sends a measurement status confirmation confirmation signal. Further, the pulsation determination means 72 determines that the flow rate has pulsation when the variation of the plurality of flow rate measurement values is equal to or more than a predetermined determination threshold value in step 83,
The average of the maximum value and the minimum value of the measured values of a plurality of times is calculated, and the measurement accuracy obtained by measuring the flow rate closest to the average value is selected and transmitted to the accuracy selecting means 41. Then, the accuracy selecting means 41 transmits the measurement accuracy suitable for the measurement at the time of pulsation to the measuring section via the wireless instructing means 11 and the wireless communication means 3 in step 85. The measurement accuracy changing unit 13 operates the flow rate measuring unit 42 with the measurement accuracy sent from the measurement instruction unit 1 to perform a full-scale flow rate measurement.
【００３９】前記精度選定手段４１が発生する計測精度
が異なる複数の計測を行わせる計測状況把握確認信号と
は流量計測手段４２にシングアラウンド式超音波流量計
測手段３０又は６０を用いた時はシングアラウンド回数
ｎを変えた信号である。The measurement status comprehension confirmation signal generated by the precision selecting means 41 for performing a plurality of measurements with different measurement precisions is a single signal when the sing-around ultrasonic flow rate measuring means 30 or 60 is used as the flow rate measuring means 42. This is a signal in which the number of rounds n is changed.
【００４０】以上のように、本実施例においては計測指
示部１に脈動確認手段７１と脈動判定手段７２を設けた
構成とすることにより、計測指示部１からの指示によ
り、遠隔地にある計測部４で計測精度の異なる測定を複
数回行い、各計測精度における流量計測値のばらつきの
大きさの比較を行って流量の脈動の有無を判定し、脈動
時は脈動の影響を排除できる計測精度で流量の計測を行
うので、流量の正確な計測が出来る。As described above, in the present embodiment, the measurement instruction section 1 is provided with the pulsation confirmation means 71 and the pulsation determination means 72, so that the measurement instruction section 1 gives an instruction to measure at a remote location. The measurement accuracy which can measure the presence or absence of the pulsation of the flow rate by performing the measurement with different measurement accuracy a plurality of times in the part 4 and comparing the magnitude of the variation of the flow rate measurement value in each measurement accuracy, and eliminating the influence of the pulsation during the pulsation Since the flow rate is measured with, the flow rate can be measured accurately.
【００４１】（実施例４）実施例１〜３で説明した流量
計測手段として図３又は図６に示すシングアラウンド式
超音波流量計測手段を採用し、流量測定を行うもので、
動作，作用の説明は前記実施例１〜３と重複するので省
略する。(Embodiment 4) The sing-around ultrasonic flow rate measuring means shown in FIG. 3 or 6 is adopted as the flow rate measuring means described in the first to third embodiments to measure the flow rate.
The description of the operation and action is the same as that of the first to third embodiments, and therefore will not be repeated.
【００４２】シングアラウンド式超音波流量計測手段を
用いれば、計測精度の変更をシングアラウンド回数の変
更として容易に実行することができる。By using the sing-around type ultrasonic flow rate measuring means, it is possible to easily change the measurement accuracy by changing the number of sing-around times.
【００４３】[0043]
【発明の効果】以上のように、本発明によれば、遠隔地
又は人間が容易に接近できない環境にある流量計測場所
で被測定流量の変化に適した計測精度を指示し、精度の
高い流量計測を行うことが出来る。As described above, according to the present invention, the measurement accuracy suitable for the change of the measured flow rate is indicated at the flow rate measurement place in the remote place or the environment where human beings cannot easily approach, and the flow rate with high accuracy can be obtained. Measurement can be performed.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施例１におけるブロック図FIG. 1 is a block diagram of a first embodiment of the present invention.
【図２】本発明の実施例１におけるフローチャートFIG. 2 is a flowchart in the first embodiment of the present invention.
【図３】本発明の実施例１における計測精度が可変でき
る流量計測手段の一実施例としてのシングアラウンド式
超音波流量計測手段のブロック図FIG. 3 is a block diagram of a sing-around ultrasonic flow rate measuring means as an example of a flow rate measuring means capable of varying measurement accuracy in the first embodiment of the present invention.
【図４】本発明の実施例２におけるブロック図FIG. 4 is a block diagram according to a second embodiment of the present invention.
【図５】本発明の実施例２におけるフローチャートFIG. 5 is a flowchart in Embodiment 2 of the present invention.
【図６】本発明の実施例１における計測精度が可変でき
る流量計測手段の一実施例としてのシングアラウンド式
超音波流量計測手段のブロック図FIG. 6 is a block diagram of a sing-around ultrasonic flow rate measurement means as an example of a flow rate measurement means capable of varying measurement accuracy in the first embodiment of the present invention.
【図７】本発明の実施例３におけるブロック図FIG. 7 is a block diagram of a third embodiment of the present invention.
【図８】本発明の実施例３におけるフローチャートFIG. 8 is a flowchart in a third embodiment of the present invention.
【図９】従来の流量計測システムのブロック図FIG. 9 is a block diagram of a conventional flow rate measurement system.
１ 計測指示部
２ 計測部
３ 無線通信手段（第一の無線通信手段）
４ 無線通信手段（第二の無線通信手段）
１１ 無線指示手段
１２ 流量計測手段
１３ 計測精度変更手段
３０ シングアラウンド式超音波流量計測手段
３７ 精度情報手段
４１ 精度選定手段
４２ 流量計測手段
６０ 精度情報を出力出来るシングアラウンド式超音波
流量計測手段
６１ 精度情報手段
７１ 脈動確認手段
７２ 脈動判定手段DESCRIPTION OF SYMBOLS 1 measurement instruction part 2 measurement part 3 wireless communication means (first wireless communication means) 4 wireless communication means (second wireless communication means) 11 wireless instruction means 12 flow rate measuring means 13 measurement accuracy changing means 30 sing-around ultrasonic wave Flow rate measuring means 37 Precision information means 41 Precision selecting means 42 Flow rate measuring means 60 Sing-around ultrasonic flow rate measuring means 61 capable of outputting precision information Precision information means 71 Pulsation confirmation means 72 Pulsation determination means
Claims (4)
指示手段と前記指示を送信する第一の無線通信手段から
なる計測指示部、並びに第一の無線通信手段からの指示
を受信する第二の無線通信手段と、前記第二の無線通信
手段で受信した指示により流量計測手段の計測精度を変
更する計測精度変更手段とからなる計測部とを備えた流
量計測システム。1. A measurement instructing section comprising a wireless instructing means for instructing a measurement accuracy of a flow rate measuring means and a first wireless communication means for transmitting the instruction, and a second for receiving an instruction from the first wireless communication means. A flow rate measuring system comprising: a wireless communication means; and a measurement unit including a measurement accuracy changing means for changing the measurement accuracy of the flow rate measuring means according to an instruction received by the second wireless communication means.
度情報により計測精度を変更して計測精度を無線指示手
段に入力する精度選定手段を設け、並びに前記計測部は
計測流量値と前記精度情報を出力する請求項１記載の流
量計測システム。2. The measurement instructing unit is provided with an accuracy selecting unit for changing the measurement accuracy based on the accuracy information received from the measuring unit and inputting the measurement accuracy to the wireless instructing unit, and the measuring unit is provided with the measured flow rate value and the accuracy. The flow rate measurement system according to claim 1, which outputs information.
数の計測状況把握確認信号を間欠的に無線指示手段へ出
力する脈動確認手段と、異なる計測精度で測定された複
数の流量計測値のばらつきの大きさより脈動の有無を判
定し、脈動ありのときは計測精度を前記複数の流量計測
値の最大値と最小値の平均値に近い流量を計測した計測
精度を出力する脈動判定手段とを設けた請求項１記載の
流量計測システム。3. The pulsation confirmation means for intermittently outputting to the wireless instruction means a plurality of measurement status confirmation confirmation signals with different measurement accuracy, and a plurality of flow rate measurement values measured with different measurement accuracy. The presence or absence of pulsation is determined from the magnitude of the variation, and when pulsation is present, the measurement accuracy is output as pulsation determination means that outputs the measurement accuracy obtained by measuring the flow rate close to the average value of the maximum and minimum values of the plurality of flow rate measurement values. The flow rate measurement system according to claim 1, which is provided.
量計測手段としてシングアラウンド式超音波流量計測手
段を有する請求項１記載の流量計測システム。4. The flow rate measuring system according to claim 1, wherein the measurement accuracy is variable, and a sing-around ultrasonic flow rate measuring means is provided as a flow rate measuring means for obtaining accuracy information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002112993A JP2003307442A (en) | 2002-04-16 | 2002-04-16 | Flow rate measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002112993A JP2003307442A (en) | 2002-04-16 | 2002-04-16 | Flow rate measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003307442A true JP2003307442A (en) | 2003-10-31 |
Family
ID=29395302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002112993A Pending JP2003307442A (en) | 2002-04-16 | 2002-04-16 | Flow rate measuring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003307442A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008102064A (en) * | 2006-10-20 | 2008-05-01 | Matsushita Electric Ind Co Ltd | Gas shut-off device |
-
2002
- 2002-04-16 JP JP2002112993A patent/JP2003307442A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008102064A (en) * | 2006-10-20 | 2008-05-01 | Matsushita Electric Ind Co Ltd | Gas shut-off device |
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