JPS6210655Y2 - - Google Patents
Info
- Publication number
- JPS6210655Y2 JPS6210655Y2 JP1980056096U JP5609680U JPS6210655Y2 JP S6210655 Y2 JPS6210655 Y2 JP S6210655Y2 JP 1980056096 U JP1980056096 U JP 1980056096U JP 5609680 U JP5609680 U JP 5609680U JP S6210655 Y2 JPS6210655 Y2 JP S6210655Y2
- Authority
- JP
- Japan
- Prior art keywords
- flowmeter
- pulses
- pulse
- verified
- fluid
- 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.)
- Expired
Links
- 238000012795 verification Methods 0.000 claims description 35
- 238000012937 correction Methods 0.000 claims description 25
- 238000012546 transfer Methods 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Description
【考案の詳細な説明】
本考案は流量計検定装置に係り、基準体積管に
よつて器差を検定される被検定流量計に高周波パ
ルスを発信する補正流量計を接続し、被検定流量
計のみかけの計量値を補正流量計のパルス数によ
つて補正し、被検定流量計の実際の計量値を高精
度で算出できるようにした流量計検定装置を提供
することを目的とする。[Detailed description of the invention] The present invention relates to a flowmeter verification device, in which a correction flowmeter that emits high-frequency pulses is connected to a flowmeter to be verified whose instrumental error is verified by a reference volume tube. It is an object of the present invention to provide a flowmeter verification device that can calculate the actual measurement value of a flowmeter to be verified with high accuracy by correcting the apparent measurement value by the number of pulses of the correction flowmeter.
一般に基準体積管を用いて流量計の器差を検定
する流量計検定装置においては、規格により被検
定流量計から104個以上のパルスを発信させ、１
パルス当りの公称容積ｑと得られたパルス数Ｎを
乗算して得られる計量値Ｎqを基準体積管の容積
Ｑと比較して器差を算出する方法が用いられる。
しかし、全ての被検定流量計が検定期間中104個
のパルスを発信する構造であるとは限らず、104
個に満たないパルスしか発信しない低周波の流量
計の場合には、発信パルスの間隔が大であるため
検定開始時と検定終了時に１パルス分にみたない
端数パルスが生じてしまい、この端数パルス分だ
け計量値Ｎqを補正する必要が生ずる。 In general, in a flowmeter verification device that uses a reference volume tube to verify the instrumental error of a flowmeter, the standard requires that the flowmeter under test emit 10 4 or more pulses.
A method is used in which the measured value N q obtained by multiplying the nominal volume q per pulse by the obtained number of pulses N is compared with the volume Q of the reference volume tube to calculate the instrumental error.
However, not all flowmeters to be certified are structured to emit 10 4 pulses during the certification period, and
In the case of a low-frequency flowmeter that only emits pulses less than one pulse, the interval between the emitted pulses is large, so a fractional pulse that does not correspond to one pulse occurs at the start and end of the verification, and this fractional pulse It becomes necessary to correct the measured value Nq by the amount.
従来この種補正は、例えば被検定流量計とは別
に高周波のクロツクパルスを発信するクロツクパ
ルス発生器を設け、被検定流量計が基準体積Ｑを
計量する間にクロツクパルス発生器が発生したク
ロツクパルスの数m1と、被検定流量計のパルス
Ｎ個分に相当するクロツクパルス発生器のパルス
数m2とを夫々計数することにより、被検定流量
計のみかけの計量値ＮqをＮｑ／ｍ２m1と補正する方法
が
用いられていた。 Conventionally, this type of correction involves, for example, providing a clock pulse generator that emits high-frequency clock pulses separately from the flowmeter to be verified, and calculating the number of clock pulses m1 generated by the clock pulse generator while the flowmeter to be verified measures the reference volume Q. By counting the number of pulses m 2 of the clock pulse generator corresponding to N pulses of the flowmeter to be verified, the apparent measured value N q of the flowmeter to be verified can be calculated as N q /m 2 m 1 . A method of correction was used.
しかるに、この種補正方法は、検定時に被検流
量計を通る流体の流量が変動した場合、特に該流
体の積算流量が基準体積Ｑに到達する前後で変動
した場合、被検定流量計のパルス間隔は変動する
が、クロツクパルス発生器のクロツクパルスのパ
ルス間隔はこの変動とは無関係であるため、パル
ス数の比Ｎ／ｍ２が流量変動の影響を受けてしまう。 However, in this type of correction method, when the flow rate of the fluid passing through the flowmeter under test changes during verification, especially when the integrated flow rate of the fluid changes before and after reaching the reference volume Q, the pulse interval of the flowmeter under test changes. varies, but since the pulse interval of the clock pulses of the clock pulse generator is independent of this variation, the ratio of the number of pulses N/m 2 is affected by the flow rate variation.
このため、実際の計量値として採用しようとする
Ｎｑ／ｍ２m1なる値が、流量変動の影響で誤差を生じて
しまい、その分だけ正確な流量検定ができない等
の欠点を有していた。For this reason, the value N q /m 2 m 1 , which is to be adopted as the actual measured value, has an error due to the influence of flow rate fluctuations, which has the disadvantage that accurate flow rate verification cannot be performed. Ta.
本考案は上記欠点を除去したものであり、以下
図面とともにその一実施例につき説明する。第１
図は本考案になる流量計検定装置の一実施例の概
略構成図、第２図はその信号演算回路の一実施例
の回路構成図、第３図は上記演算回路内各部の信
号波形線図である。 The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings. 1st
The figure is a schematic diagram of an embodiment of the flowmeter verification device according to the present invention, Figure 2 is a circuit diagram of an embodiment of its signal calculation circuit, and Figure 3 is a signal waveform diagram of each part in the calculation circuit. It is.
第１図中、流量計検定装置１は、流体を提供さ
れる配管途中に設けられており、比較的低周波の
パルスＳTを発信する例えばルーツ式流量計等の
被検定流量計２に、比較的高周波のパルスＳoを
発信する補正流量計３を接続し、この補正流量計
３を４個のポート４ａ，４ｂ，４c.４ｄを有する
四方切換弁４を介してＵ字状のパイププルーバか
らなる基準体積管５に接続した構成とされてい
る。基準体積管５には、２個所に管内を走行する
スヘア等の移送体６が所定区間の入口、出口を通
過したことを検知するデイテクタスイツチ７，８
が設けてあり、両スイツチ（第１，第２の検出ス
イツチ）７，８間の容積Ｑは予め正確に計測され
ている。 In FIG. 1, a flowmeter verification device 1 is installed in the middle of a pipe that is supplied with fluid, and transmits a relatively low-frequency pulse ST to a flowmeter to be verified 2, such as a Roots flowmeter. A correction flowmeter 3 that emits a relatively high-frequency pulse S o is connected, and the correction flowmeter 3 is connected to a U-shaped pipe prover via a four-way switching valve 4 having four ports 4a, 4b, 4c, and 4d. The reference volume tube 5 is connected to a reference volume tube 5. The reference volume tube 5 is provided with detector switches 7 and 8 at two locations for detecting when the transfer body 6, such as a shair, running inside the tube has passed through the entrance and exit of a predetermined section.
is provided, and the volume Q between both switches (first and second detection switches) 7 and 8 is accurately measured in advance.
検定に際し通液を開始すると、被検定流量計２
と補正流量計３を通過した液体は、四方換弁４を
ポート４ａ，４ｂの順で通り、基準体積管５内に
供給される。その結果、図示の位置にある移送体
６は液圧により押され、デイテクタスイツチ７を
通過して基準体積管５の他端側に送られるととも
に基準体積管５内の液体は四方切換弁４のポート
４ｄ，４ｃを通つて外部に排出される。移送体６
がデイテクタスイツチ７を通過してから他方のデ
イテクタスイツチ８を通過するまでに被検定流量
計２が計測したみかけの計量値は、流量計２の１
パルス当りの公称容積をｑとすると、検定期間中
に発信器２ａが発信したパルス数ＮによりＮqで
表わされる。しかし、この計量値Ｎqはあくまで
見かけの計量値であり、この計量値Ｎqを基準体
積管５のデイテクタスイツチ７，８間の体積Ｑと
単純に比較したのでは十分な検定精度が得られ
ず、このため後述する如く補正流量計３の計量値
による補正を行なう必要がある。 When the flow of liquid starts during the verification, the flow meter to be verified 2
The liquid that has passed through the correction flowmeter 3 passes through the four-way valve 4 through ports 4a and 4b in this order, and is supplied into the reference volume pipe 5. As a result, the transfer body 6 in the illustrated position is pushed by the hydraulic pressure, passes through the detector switch 7, and is sent to the other end of the reference volume tube 5, and the liquid in the reference volume tube 5 is transferred to the four-way switching valve 4. It is discharged to the outside through ports 4d and 4c. Transport body 6
The apparent weight value measured by the flow meter 2 to be verified from when it passes through the detector switch 7 to when it passes through the other detector switch 8 is 1 of the flow meter 2.
Letting the nominal volume per pulse be q, it is expressed as Nq by the number N of pulses transmitted by the transmitter 2a during the verification period. However, this measured value Nq is only an apparent measured value, and sufficient verification accuracy cannot be obtained by simply comparing this measured value Nq with the volume Q between the detector switches 7 and 8 of the reference volume tube 5. Therefore, it is necessary to perform correction using the measured value of the correction flowmeter 3 as described later.
補正流量計３は、検定中規格に定められた104
個以上のパルスを発信する発信器３ａを有してお
り、従来のクロツクパルス発信器に替り、より優
れた検定精度を挙げるために用いたものである。
補正流量計３は必ずしも較正済みであることを要
しないが、検定時の流量設定値を知るために指示
流量計としても利用できるから、ある程度の精度
が得られるものを用いるのが望ましい。 The corrected flowmeter 3 is 10 4 specified in the standard during certification.
The clock pulse generator has a transmitter 3a which transmits more than one pulse, and is used in place of a conventional clock pulse transmitter to achieve better verification accuracy.
Although the correction flowmeter 3 does not necessarily need to be calibrated, it is preferable to use one that can provide a certain degree of accuracy since it can also be used as an indicating flowmeter to know the flow rate setting value at the time of verification.
以下、流量計検定装置１による検定方法につ
き、第２，３図を併せ説明する。 The verification method using the flowmeter verification device 1 will be described below with reference to FIGS. 2 and 3.
デイテクタスイツチ７，８は受信器９に接続さ
れており、移送体６の通過を検知して夫々検定開
始信号S1と検定終了信号S2を出力する。一方、受
信器１０で受信された被検定流量計２の計数パル
スＳTは、演算回路１１内のフリツプフロツプ１
２のクロツク入力端子に供給され、デイテクタス
イツチ７からの検定開始信号S1がセツト入力端子
に供給されてからデイテクタスイツチ８からの検
定終了信号S2がリセツト入力端子に供給されるま
での間（検定期間中）、パルスＳNとして出力され
る。このパルスＳNのパルス数はＮ個である。 Detector switches 7 and 8 are connected to a receiver 9, detect the passage of the transport object 6, and output a test start signal S1 and a test end signal S2, respectively. On the other hand, the counting pulse S T of the flowmeter to be tested 2 received by the receiver 10 is applied to the flip-flop 1 in the arithmetic circuit 11.
2, and from when the verification start signal S1 from the detector switch 7 is supplied to the set input terminal until the verification end signal S2 from the detector switch 8 is supplied to the reset input terminal. (during the verification period), it is output as a pulse S N. The number of pulses of this pulse S N is N.
又、受信器１３で受信された補正流量計３の計
数パルスＳoは、Ｄ／Ａ変換器を有する流量指示
計１４によつて検定流量として指示される一方、
演算回路１１内のフリツプフロツプ１５のクロツ
ク入力端子に供給される。クロツク入力端子に供
給されたパルスＳoは、前記フリツプフロツプ１
２同様検定期間中だけパルスＳo1として出力され
る。このパルスＳo1のパルス数はn1個である。 Further, the counting pulse S o of the correction flowmeter 3 received by the receiver 13 is indicated as a verification flow rate by the flow rate indicator 14 having a D/A converter,
It is supplied to the clock input terminal of flip-flop 15 in arithmetic circuit 11. The pulse S o supplied to the clock input terminal is applied to the flip-flop 1.
Similar to 2, it is output as pulse S o1 only during the verification period. The number of pulses S o1 is n1 .
演算回路１１内には、上記２個のフリツプフロ
ツプ１２，１５のほかに、２個のフリツプフロツ
プ１６，１７と遅延回路１８からなる計数回路１
１ａが設けてある。フリツプフロツプ１６は、フ
リツプフロツプ１２の最初のパルスＳNによつて
セツトされ、受信器１３からのパルスＳoをクロ
ツク入力端子に供給される。他方のフリツプフロ
ツプ１７は、デイテクタスイツチ８からの検定終
了信号S2によつてセツトされ、受信器１０からの
パルスＳTをクロツク入力端子に供給される。こ
のフリツプフロツプ１７の出力は、遅延回路１８
を介してフリツプフロツプ１６のリセツト入力端
子に供給されるようになつており、遅延回路１８
の遅延時間はパルスＳTの幅より大で、かつパル
スＳTの隣り合う２個のパルスの間隔よりも大に
設定してあるので、フリツプフロツプ１７は検定
終了直後のパルスＳTと同一タイミングのパルス
を１個だけ出力する。 In addition to the above-mentioned two flip-flops 12 and 15, the arithmetic circuit 11 includes a counting circuit 1 consisting of two flip-flops 16 and 17 and a delay circuit 18.
1a is provided. Flip-flop 16 is set by the first pulse S N of flip-flop 12 and receives pulse S o from receiver 13 at its clock input. The other flip-flop 17 is set by the verification end signal S 2 from the detector switch 8 and receives the pulse ST from the receiver 10 at its clock input terminal. The output of this flip-flop 17 is connected to the delay circuit 18.
is supplied to the reset input terminal of the flip-flop 16 via the delay circuit 18.
Since the delay time of is set to be larger than the width of the pulse S T and larger than the interval between two adjacent pulses of the pulse S T , the flip-flop 17 is set to have the same timing as the pulse S T immediately after the verification is completed. Outputs only one pulse.
一方、上記フリツプフロツプ１７の出力はフリ
ツプフロツプ１６のリセツト入力端子に供給され
るので、フリツプフロツプ１６は検定開始直後の
パルスＳTの第１番目のパルスから第Ｎ＋１番目
のパルスまでの間、即ちパルスＳNのパルスＮ個
分に相当するパルスＳoをパルスＳo2として出力
する。 On the other hand, since the output of the flip-flop 17 is supplied to the reset input terminal of the flip-flop 16, the flip-flop 16 operates from the first pulse of the pulse S T immediately after the start of the verification to the N+1-th pulse, that is, the pulse S N A pulse S o corresponding to N pulses of is outputted as a pulse S o2 .
こうして、演算回路１１は３種のパルスＳN，
Ｓo1，Ｓo2を出力するが、パルスＳo1の個数n1が
被検定流量計２の実際の計量値Q′に対応してお
り、パルスＳo2のn2個分が被検定流量計２のみか
けの計量値Ｎqに相当する。従つて実際の計量値
Q′は
Q′＝Ｎｑ／ｎ２n1
と補正される。このことから被検定流量計２の器
差Ｅは
Ｅ＝Ｑ′−Ｑ／Ｑ′
＝１−Ｑ／Ｎｑｎ２／ｎ１
で表わされ、既知のパルス数Ｎ，n1，n2を用いて
器差Ｅが正確に算出される。 In this way, the arithmetic circuit 11 generates three types of pulses S N ,
S o1 and S o2 are output, but the number n 1 of pulses S o1 corresponds to the actual measured value Q' of the flow meter 2 to be verified, and the number n 2 of pulses S o2 corresponds to the actual measured value Q' of the flow meter 2 to be verified. This corresponds to the apparent weight value Nq . Therefore the actual weight value
Q' is corrected as Q'=N q /n 2 n 1 . From this, the instrumental error E of the flowmeter 2 to be verified is expressed as E=Q'-Q/Q'=1-Q/ Nqn2 / n1 , and the known number of pulses N, n1 , n2 Using this, the instrumental error E is accurately calculated.
尚、補正を施さない場合の器差は１−Ｑ／Ｎｑで表
されるから、n1とn2を計数して補正したことによ
る効果は明白である。 Incidentally, since the instrumental error without correction is expressed as 1-Q/N q , the effect of counting and correcting n 1 and n 2 is obvious.
このように、上記構成になる流量計検定装置１
は、高周波の発信器３ａを有する補正流量計３か
らのパルスＳoの計数値n1，n2をもとに器差Ｅを
演算するようにしているから、例えば検定時に被
検定流量計２及び補正流量計３を通る流体の流量
が変動した場合、被検定流量計２からのパルスＳ
Nの間隔の変動にあわせて補正流量計３のパルス
Ｓoが変動するので、パルスＳNとパルスＳoのパ
ルス数比Ｎ／ｎ２は流量変動の影響を受けない。従つ
て、被検定流量計２の実際の計量値Ｎｑ／ｎ２n1は、補
正流量計３の替りにクロツクパルス発生器を用い
た従来の流量計検定装置から得られる実際の計量
値Ｎｑ／ｍ２m1に比較して精度が高く、特に低流量域で
の検定における精度は高い。 In this way, the flow meter verification device 1 having the above configuration
Since the instrumental error E is calculated based on the count values n 1 and n 2 of the pulse S o from the correction flowmeter 3 having a high-frequency oscillator 3a, for example, when verifying the flowmeter 2 to be verified, And when the flow rate of the fluid passing through the correction flowmeter 3 fluctuates, the pulse S from the flowmeter to be verified 2
Since the pulse S o of the correction flowmeter 3 varies in accordance with the variation in the interval of N , the pulse number ratio N/n 2 between the pulse S N and the pulse S o is not affected by the flow rate variation. Therefore, the actual measured value N q /n 2 n 1 of the flow meter 2 to be verified is the actual measured value N q obtained from the conventional flow meter verification device that uses a clock pulse generator instead of the correction flow meter 3. /m 2 m 1 The accuracy is higher than that of 1, especially in the low flow rate range.
又、流量計検定装置１は、補正流量計３から得
られる流量指示値を目安に検定時の流量設定が可
能であるから、正確な検定流量の設定が可能であ
る。 Further, since the flow meter verification device 1 can set the flow rate at the time of verification using the flow rate instruction value obtained from the corrected flow meter 3 as a guide, it is possible to set an accurate verification flow rate.
尚、上記実施例において、基準体積管５として
は両方向に移送体６を移送できるいわゆるバイデ
イレクシヨナル型のパイププルーバを用いたが、
一方向にのみ移送体６の移送が可能なユニデイレ
クシヨナル型のパイププルーバを用いて構成して
もよい。 In the above embodiment, a so-called bi-directional type pipe prover capable of transferring the transfer body 6 in both directions was used as the reference volume pipe 5.
A unidirectional type pipe prover that can transfer the transfer body 6 in only one direction may be used.
又移送体６としてはスヘアに限らず、他の例え
ばピストン、カツプ等を用いてもよい。 Further, the transfer body 6 is not limited to a hair, but other types such as a piston, a cup, etc. may also be used.
又、上記実施例において、被検定流量計として
はルーツ式に限らず、他の例えば楕円歯車式等の
容積式流量計、タービン式流量計を用いてもよ
い。 Furthermore, in the above embodiments, the flowmeter to be tested is not limited to the Roots type, but other positive displacement flowmeters such as an elliptical gear type, or a turbine type flowmeter may be used.
上述の如く、本考案になる流量計検定装置は、
流体の供給により管内を移送される移送体を有
し、該移送体が管内の所定区間を移送されるとき
所定の体積の流体を流出する基準体積管と、該移
送体が該所定区間の入口、出口を通過したことを
検出する第１、第２の検出スイツチと、該基準体
積管に流体を供給する配管に設けられており、１
パルス当りの公称容積がｑとされ、該基準体積管
内の該移送体の移送区間によつて定められた所定
体積の流体を計量したときにＮ個の比較的低周波
のパルスを発信する被検定流量計と、該配管に接
続され前記所定体積の流体を計量したときに該被
検定流量計より高周波のパルスをn1個発信する補
正流量計と、該被検定流量計のパルスＮ個分に相
当する該補正流量計のパルス数n2を計数する計数
回路とからなり、該被検定流量計のみかけ上の計
量値Ｎqを、該第１の検出スイツチが移送体を検
出してから該第２の検出スイツチが移送体を検出
する間に計数された該補正流量計のパルス数n1と
該計数回路のパルス数n2を用い、Ｎｑ／ｎ２n1と補正し
て
実際の計量値を得る構成としたため、検定時に被
検定流量計及び補正流量計を通る流体の流量が変
動した場合、特に該流体の積算流量が基準体積Ｑ
に到達する前後で変動した場合でも、被検定流量
計のパルス間隔の変動にあわせて補正流量計のパ
ルス間隔が変動するので、パルス数比Ｎ／ｎ２は流量変
動の影響を受けず、従つて被検定流量計の実際の
計量値を高精度で計測することができる。さら
に、移送体が所定区間を移送され基準体積管の所
定体積を計量したとき低周波のパルスの端数を補
正流量計の高周波のパルスで補正するため、例え
ば基準流量計のパルス間隔で計数されたクロツク
パルス数に対応する流量値を記憶回路に記憶させ
ておき、記憶しておいた流量値に基づいて基準流
量計に接続された他の流量計の計量値を補正する
ものに比べてより高精度に計測値を補正でき、よ
り信頼性が高くより正確な器差の検定が可能であ
り、さらに又補正流量計を用いて検定時の流量設
定が可能であるから、正確な流量設定が可能であ
る等の特長を有する。 As mentioned above, the flow meter verification device according to the present invention is
A reference volume pipe having a transfer body that is transferred within the pipe by supplying fluid, and from which a predetermined volume of fluid flows out when the transfer body is transferred through a predetermined section in the pipe, and the transfer body is an entrance of the predetermined section. , first and second detection switches for detecting passage of the fluid through the outlet, and a pipe for supplying fluid to the reference volume pipe;
A test target having a nominal volume per pulse of q and emitting N relatively low-frequency pulses when measuring a predetermined volume of fluid determined by the transfer section of the transfer body in the reference volume tube. a flowmeter, a correction flowmeter that is connected to the piping and transmits n 1 high-frequency pulses from the flowmeter to be verified when the predetermined volume of fluid is measured; It consists of a counting circuit that counts the corresponding number of pulses n2 of the corrected flowmeter, and calculates the apparent measured value Nq of the flowmeter to be verified after the first detection switch detects the transport object. Using the number of pulses n 1 of the correction flowmeter and the number n 2 of pulses of the counting circuit counted while the second detection switch detects the transport object, the actual value is corrected as N q /n 2 n 1 . Since the configuration is configured to obtain measured values, if the flow rate of the fluid passing through the flowmeter to be verified and the correction flowmeter fluctuates during verification, the cumulative flow rate of the fluid will change from the reference volume Q.
Even if the pulse interval of the corrected flowmeter fluctuates according to the fluctuation of the pulse interval of the flowmeter under test, the pulse number ratio N/ n2 is not affected by the flow rate fluctuation, and the Therefore, the actual measured value of the flowmeter to be verified can be measured with high precision. Furthermore, when the transport body is transferred over a predetermined section and a predetermined volume of the reference volume pipe is measured, the fraction of the low frequency pulse is corrected by the high frequency pulse of the correction flowmeter, so that the pulse interval of the reference flowmeter is used to correct the fraction of the low frequency pulse. Higher accuracy compared to systems that store the flow rate value corresponding to the number of clock pulses in a memory circuit and correct the measured values of other flowmeters connected to the reference flowmeter based on the stored flow rate value. Measured values can be corrected, allowing for more reliable and accurate verification of instrumental errors.Furthermore, a correction flowmeter can be used to set the flow rate at the time of verification, making it possible to set the flow rate accurately. It has certain features such as:
第１図は本考案になる流量計検定装置の一実施
例の概略構成図、第２図はその信号演算回路の一
実施例の回路構成図、第３図は上記信号演算回路
内各部の信号波形線図である。
１……流量計検定装置、２……被検定流量計、
３……補正流量計、５……基準体積管、７，８…
…デイテクタスイツチ、１１ａ……計数回路。
Fig. 1 is a schematic diagram of an embodiment of the flow meter verification device according to the present invention, Fig. 2 is a circuit diagram of an embodiment of its signal calculation circuit, and Fig. 3 shows signals of various parts in the signal processing circuit. It is a waveform diagram. 1...Flowmeter verification device, 2...Flowmeter to be verified,
3...Correction flow meter, 5...Reference volume tube, 7, 8...
...detector switch, 11a...counting circuit.
Claims (1)
し、該移送体が管内の所定区間を移送されるとき
所定の体積の流体を流出する基準体積管と、該移
送体が該所定区間の入口、出口を通過したことを
検出する第１、第２の検出スイツチと該基準体積
管に流体を供給する配管に設けられており、１パ
ルス当りの公称容積がｑとされ、該基準体積管内
の該移送体の移送区間によつて定められた所定体
積の流体を計量したときにＮ個の比較的低周波の
パルスを発信する被検定流量計と、該配管に接続
され前記所定体積の流体を計量したときに該被検
定流量計より高周波のパルスをn1個発信する補正
流量計と、該被検定流量計のパルスＮ個分に相当
する該補正流量計のパルス数n2を計数する計数回
路とからなり、該被検定流量計のみかけ上の計量
値Ｎqを、該第１の検出スイツチが移送体を検出
してから該第２の検出スイツチが移送体を検出す
る間に計数された該補正流量計のパルス数n1と該
計数回路のパルス数n2を用い、Ｎｑ／ｎ２n1と補正して
実 際の計量値を得る構成とした流量計検定装置。[Claims for Utility Model Registration] A reference volume pipe that has a transfer body that is transferred within the pipe by supplying fluid, and that discharges a predetermined volume of fluid when the transfer body is transferred through a predetermined section within the pipe; First and second detection switches are provided for detecting that the transfer body has passed through the inlet and outlet of the predetermined section, and are provided in the piping that supplies fluid to the reference volume tube, and the nominal volume per pulse is q. and a flowmeter to be verified that emits N relatively low-frequency pulses when measuring a predetermined volume of fluid determined by the transfer section of the transfer body in the reference volume pipe; a correction flowmeter that is connected and transmits n 1 high-frequency pulses from the flowmeter to be verified when measuring the predetermined volume of fluid; It consists of a counting circuit that counts the number of pulses n2 , and after the first detection switch detects the transfer object, the second detection switch transfers the apparent measured value Nq of the flowmeter to be verified. The number of pulses n 1 of the correction flowmeter counted while detecting the body and the number n 2 of pulses of the counting circuit are used to correct N q /n 2 n 1 to obtain the actual measured value. Flow meter verification device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980056096U JPS6210655Y2 (en) | 1980-04-24 | 1980-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980056096U JPS6210655Y2 (en) | 1980-04-24 | 1980-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56157627U JPS56157627U (en) | 1981-11-25 |
| JPS6210655Y2 true JPS6210655Y2 (en) | 1987-03-13 |
Family
ID=29650708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980056096U Expired JPS6210655Y2 (en) | 1980-04-24 | 1980-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6210655Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008510991A (en) * | 2004-08-24 | 2008-04-10 | マイクロ・モーション・インコーポレーテッド | Method and apparatus for verifying a flow meter |
| JP2011185945A (en) * | 2011-05-02 | 2011-09-22 | Micro Motion Inc | Method and device for verifying flowmeter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112528A (en) * | 1979-02-22 | 1980-08-30 | Tokyo Tatsuno Co Ltd | Forming method of data used for flow meter |
-
1980
- 1980-04-24 JP JP1980056096U patent/JPS6210655Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112528A (en) * | 1979-02-22 | 1980-08-30 | Tokyo Tatsuno Co Ltd | Forming method of data used for flow meter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008510991A (en) * | 2004-08-24 | 2008-04-10 | マイクロ・モーション・インコーポレーテッド | Method and apparatus for verifying a flow meter |
| JP4847454B2 (en) * | 2004-08-24 | 2011-12-28 | マイクロ・モーション・インコーポレーテッド | Method and apparatus for verifying a flow meter |
| JP2011185945A (en) * | 2011-05-02 | 2011-09-22 | Micro Motion Inc | Method and device for verifying flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56157627U (en) | 1981-11-25 |
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