JPS5970916A - Apparatus for measuring gas flow amount - Google Patents

Apparatus for measuring gas flow amount

Info

Publication number
JPS5970916A
JPS5970916A JP57180690A JP18069082A JPS5970916A JP S5970916 A JPS5970916 A JP S5970916A JP 57180690 A JP57180690 A JP 57180690A JP 18069082 A JP18069082 A JP 18069082A JP S5970916 A JPS5970916 A JP S5970916A
Authority
JP
Japan
Prior art keywords
flow rate
output
counter
flow amount
time
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
Application number
JP57180690A
Other languages
Japanese (ja)
Other versions
JPH0461285B2 (en
Inventor
Hiroshi Fujieda
藤枝 博
Tatsuo Saka
達男 坂
Takashi Uno
宇野 尚
Hiroyuki Kono
博之 河野
Tatsuo Fujimoto
龍雄 藤本
Satoru Kitajima
北島 哲
Isao Honma
本間 勲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Panasonic Holdings Corp
Original Assignee
Tokyo Gas Co Ltd
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Gas Co Ltd, Matsushita Electric Industrial Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP57180690A priority Critical patent/JPS5970916A/en
Publication of JPS5970916A publication Critical patent/JPS5970916A/en
Publication of JPH0461285B2 publication Critical patent/JPH0461285B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06Indicating or recording devices
    • G01F15/061Indicating or recording devices for remote indication
    • G01F15/063Indicating or recording devices for remote indication using electrical means

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Details Of Flowmeters (AREA)

Abstract

PURPOSE:To obtain an accurate gas flow amount within a short time, by a method wherein pulses of which intervals are changed corresponding to the gas flow amount are counted for a definite time and the obtained value is divided by a time elapsed before a new flow amount pulse is inputted. CONSTITUTION:The output pulses fp of a flow amount pulse generator 1 are counted by a counter 2 while the output pulses of an oscillator 31 are counted by a timer 3. When a predetermined time is elapsed, a signal TB1 is outputted from output O1. Thereafter, when a new flow amount pulse fp is inputted to the counter, the logical product of this signal and the signal TB1, that is, an output signal is generated in an AND gate 4. By the output of the AND gate 4, a division device 5 starts the performance of division wherein the flow amount pulse count value N to be devided is divided by a measuring time T being a divisor. The division result, that is, N/T is inputted to a latch 6 from the division device 5.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ガス流量の測定装置に関し、特に単位時間当
りのガス流量の測定装置に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for measuring gas flow rate, and more particularly to a device for measuring gas flow rate per unit time.

従来例の構成とその問題点 従来より、ガスの積算流量の測定装置としては、例えば
模式メークがよく知られている。まだこの模式メータを
遠隔検針用に改造したものかある。
Conventional Structure and Problems Conventionally, for example, a schematic make is well known as a device for measuring the integrated flow rate of gas. There are still some models of this model that have been modified for remote meter reading.

この遠隔検針用のメータでは、メータに用いられるダイ
アフラム又はダイアフラムの往復動をメータ本体の開閉
弁の開閉力として利用するために設けるリンク機構に磁
石を設け、この磁石の動きを、リードスイッチ、ホール
1C等の磁果センザで電気パルスに変換し、この電気パ
ルスをカウンタで計数し、その出力を表示する構成をと
る。この種用途では、瞬時値を知る必要はなく、いくら
の体積のガスを利用者が消費したかを知ればよいので、
このようないわゆる積算型のガス流量測定装置であるこ
とが望まれる。この種装置では当然ながら、比較的短い
単位時間当りの流量を知ることはできない。
In this meter for remote meter reading, a magnet is installed in the link mechanism provided to use the diaphragm used in the meter or the reciprocating motion of the diaphragm as the opening/closing force of the on-off valve in the meter body. It is configured to convert into electric pulses using a magnetic sensor such as 1C, count these electric pulses with a counter, and display the output. In this type of application, it is not necessary to know the instantaneous value, it is only necessary to know how much volume of gas the user has consumed.
Such a so-called integration type gas flow rate measuring device is desired. Naturally, with this type of device, it is not possible to know the flow rate per unit time which is relatively short.

発明の目的 この発明はガス流量をきわめて正確に測定することを目
的とする。
OBJECTS OF THE INVENTION The purpose of the invention is to measure gas flow rates with great accuracy.

発明の構成 この発明は、ガス流量に応じて間隔の変化するパルスを
一定時間(たとえば30秒間)カウンタでカウントし、
除算器により除算で単位時間(たとえば1秒間)にいく
つのパルスが存在するかを測定することにより、パルス
のばらつきによって誤差の出ない正確なガス流量を測定
する構成である。
Structure of the Invention This invention uses a counter to count pulses whose intervals change depending on the gas flow rate for a certain period of time (for example, 30 seconds).
By measuring how many pulses are present in a unit time (for example, one second) by division using a divider, the gas flow rate is accurately measured without errors due to variations in pulses.

実施例の説明 以下図面を用いて本発明の実施例を詳細に説明する。流
量パルス発生器1は、上述した従来装置に用いられてい
るもの同様の構成で、例えば模式メータを流量検出器と
して用いる場合は、ダイアフラム又はそのリンク機構に
設けた磁石と磁界センサとを組合せた構成となる。この
場合、ダイアフラム−往復の都度パルスfpが1個発生
する。
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The flow rate pulse generator 1 has a configuration similar to that used in the conventional device described above. For example, when a schematic meter is used as a flow rate detector, a magnet provided on a diaphragm or its link mechanism is combined with a magnetic field sensor. It becomes the composition. In this case, one pulse fp is generated each time the diaphragm moves back and forth.

ダイアプラムが一往復すると、単位流量Quが流れるの
で、原生パルス発生器のパルス間隔毎に流量Qulが流
れていることになる。この流量パルス発生器1の出力パ
ルスfpを、カウンタ2で引数する。一方、カウンタ2
の計数開始より、タイマ3が動作する。タイマ3は、発
振器31の出力パルスをカウンタ32で計数する構成を
とる。カウンタ32は、発振器31のパルスを所定数カ
ウントすなわち所定時間Tφ例えば1分経過すると、出
力01より、信号TB1を出力する(第2図口)。
When the diaphragm makes one reciprocation, a unit flow rate Qu flows, so a flow rate Qul flows at each pulse interval of the primitive pulse generator. The output pulse fp of the flow rate pulse generator 1 is used as an argument in the counter 2. On the other hand, counter 2
From the start of counting, timer 3 starts operating. The timer 3 is configured to count the output pulses of the oscillator 31 with a counter 32. When the counter 32 counts a predetermined number of pulses from the oscillator 31, that is, when a predetermined time Tφ, for example, one minute has elapsed, it outputs a signal TB1 from the output 01 (see FIG. 2).

この後新たな流量パルスfP、すなわち第2図イでN個
目のパルスがカウンタ2に入力されると、この信号と、
前述の信号TB1との論理積すなわち、ANDゲート4
で出力信号が発生する(第2図・・)。
After this, when a new flow rate pulse fP, that is, the Nth pulse in Fig. 2A, is input to the counter 2, this signal and
Logical product with the aforementioned signal TB1, that is, AND gate 4
An output signal is generated at (Figure 2...).

ANDゲート4の出力により、除算器6は、カウンタ2
の内容すなわち流量パルス計数値Nを被除数とし、カウ
ンタ32の内容すなわち計測時間Tを除数とし、除算の
実行を開始する。除算結果すなわち、N/Tは除算器6
より出力され、ラッチ6に入力される。除算経果N /
 Tば、物理的には次のような意味をもつ。発振器31
の出力周到を単位計測時間とし、その計測時間当りの流
量を表わしている。パルス間隔毎に流量Quが流れてい
るから、実際には、開側時間Tの間に、(NXQuMの
流量が流れたことになる。従がって、Qu=1とすれば
発掘器31の出力周期が例えば1秒であれば、除算器5
の出力は、N /T (l /sea )となり、単位
時間当りの流量を示すことになる。ラッチ6ば、AND
ゲート4の出力を、遅延回路7で遅延させて得たパルス
(第2図二)で、入力データすなわち除算器6の出力を
ラッチする。他方、遅延回路7の出力にて、カウンタ2
,32をリセットし、両カウンタを初期化し、次の計測
をスタートさせる。従がって、N個目の流量パルスfp
にて一削測が終了するとともに次回用の計測がスタート
することになる゛。次回の計測中は、前回の流量がラン
チ6が保存されている。
The output of the AND gate 4 causes the divider 6 to divide the counter 2
The content of the counter 32, that is, the flow rate pulse count value N, is used as the dividend, and the content of the counter 32, that is, the measurement time T is used as the divisor, and execution of division is started. The division result, that is, N/T is the divider 6
The signal is output from the latch 6 and input to the latch 6. Division result N/
T has the following physical meaning. Oscillator 31
The output accuracy is taken as a unit measurement time, and the flow rate per measurement time is expressed. Since the flow rate Qu flows at every pulse interval, the flow rate of (NXQuM) actually flowed during the open side time T. Therefore, if Qu = 1, the flow rate of the excavator 31 For example, if the output period is 1 second, the divider 5
The output is N /T (l /sea), which indicates the flow rate per unit time. Latch 6, AND
The input data, ie, the output of the divider 6, is latched with a pulse obtained by delaying the output of the gate 4 by the delay circuit 7 (FIG. 2, 2). On the other hand, at the output of the delay circuit 7, the counter 2
, 32, initialize both counters, and start the next measurement. Therefore, the Nth flow rate pulse fp
Once the first measurement is completed, the next measurement will begin. During the next measurement, the previous flow rate of lunch 6 is saved.

上述の実施例によれば、比較的短かい割測時間(例えば
約1分)で、単位時間(例えば1秒)当りの流量を正確
に知ることができる。計測時間は、所定時間Tφ (例
えば1分)経過した後の新たな流量パルスが発生するま
での時間であり、流量パル78個の時間を、発振器31
の出力周波数の分解能で測定できるから所望の測定精度
を得るには、発振器31の出力周波数を操作するのみで
容易に高精度化ができる。
According to the embodiment described above, the flow rate per unit time (for example, 1 second) can be accurately determined in a relatively short measuring time (for example, about 1 minute). The measurement time is the time until a new flow pulse is generated after a predetermined time Tφ (for example, 1 minute) has elapsed, and the time for 78 flow pulses is calculated by the oscillator 31.
Since measurement can be performed with a resolution of the output frequency, high precision can be easily achieved by simply manipulating the output frequency of the oscillator 31 to obtain the desired measurement accuracy.

第3図は、多種類のガスメータに対応するための本発明
の他の実施例である。模式ガスメータでは、例えば、ダ
イアフラム−往復での単位流量Quとして、0,6 l
 、 0,9 l 、  1,7 l トイツタ流量の
種類のメータかあり、これらの量を単位流量設定器8a
、8b、80で設定する。スイッチ9て、流量パルス発
生器を取付けているメータの種類を選択する。図では、
流量設定器8bを選択しており、その単位流量0.91
である。この値と、ラッチ6の出力との積を、乗算器1
0で求める。その出力は、(N Xo、9 ) l /
 secとなる。乗算器10の乗算開始信号は、遅延回
路7の出力を遅延回路11で更に一遅延した信号である
。すなわち、ラッチ6のチー・夕をラッチした後に、乗
算を開始する。
FIG. 3 shows another embodiment of the present invention to accommodate many types of gas meters. In a model gas meter, for example, the unit flow rate Qu from the diaphragm to the round trip is 0.6 l.
, 0,9 l, 1,7 l There are meters for the flow rate, and these quantities can be set using the unit flow rate setting device 8a.
, 8b, and 80. Use switch 9 to select the type of meter to which the flow rate pulse generator is attached. In the diagram,
Flow rate setting device 8b is selected, and its unit flow rate is 0.91
It is. The product of this value and the output of latch 6 is multiplier 1
Find it using 0. Its output is (N Xo, 9) l/
sec. The multiplication start signal of the multiplier 10 is a signal obtained by further delaying the output of the delay circuit 7 by a delay circuit 11. That is, after latching Qi and Q of latch 6, multiplication is started.

第1図の回路にさらに、メータ程毎の単位流量設定器8
a〜8Cを設け、これをスイッチ9にて適当に選択し、
選択した値と、ラッチ6の出力の積を乗算器10にて求
めることにより、多数のメータに対応できる。
In addition to the circuit shown in Figure 1, a unit flow rate setting device 8 for each meter is added.
Provide a to 8C, select it appropriately with switch 9,
By calculating the product of the selected value and the output of the latch 6 using the multiplier 10, it is possible to correspond to a large number of meters.

発明の効果 以上詳述したように、本発明は、流量パルスをカウンタ
で計数するとともに、カウンタの計数開始時より所定時
間経過した後、新たな流量パルスがカウンタに入力され
るまでの時間Tを計測し、この時間Tで計数した流量パ
ルスの数Nを求め、流量パルス数Nを時間Tで除するこ
とにより、単位時間を求めるものであり、極めて正確か
つ短時間のうちに、単位時間当りの流量を知ることがで
きる。
Effects of the Invention As described in detail above, the present invention counts flow rate pulses with a counter and calculates the time T until a new flow rate pulse is input to the counter after a predetermined time has elapsed from the start of counting by the counter. The unit time is calculated by calculating the number N of flow pulses counted in this time T, and dividing the number N of flow pulses by the time T. You can know the flow rate.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例のガス流量測定装置の電気回
路のブロック図、第2図は第1図の動作説明用タイミン
グ図、第3図は本発明の他の実施例の装置の電気回路の
ブロック図である。 1・・・・・・流量パルス発生器、2・・・・・・カウ
ンタ、3・・・・・・タイマ、6・・・・・・除算器。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 79− 第2図 第3図 θα 第1頁の続き 0発 明 者 本間勲 東京都中央区八重洲1丁目2番 16号東京瓦斯株式会社内 ■出 願 人 東京瓦斯株式会社 東京都中央区八重洲1丁目2番 16号 l事件の表示 昭和57年6゛許願第 180690号2発明の名称 ガス流量測定装置 3袖正をする者 事件との関係      q・1′   許   出 
 願  人任 所  大阪府門真市大字門真1006番
地名 称 (582)松下電器産業株式会社住 所  
大阪府門真市大字門真1006番地松下電器産業株式会
社内 2、特許請求の範囲 ガス供給ライン中に流量センサーを設け、この信号とし
てガス流量に応じて流量パルスを出力す量パルスをカウ
ンタで計数し、このカウンタの計イマで計測し、前記カ
ウンタの出力を被除数入力とし、前記タイマの出力を除
数入力とする除算器で除算して、前記徐算器出力を流量
信号として出力信号とするガス流量測定装置。
FIG. 1 is a block diagram of an electric circuit of a gas flow rate measuring device according to an embodiment of the present invention, FIG. 2 is a timing diagram for explaining the operation of FIG. 1, and FIG. 3 is a diagram of an apparatus according to another embodiment of the present invention. FIG. 2 is a block diagram of an electric circuit. 1...Flow rate pulse generator, 2...Counter, 3...Timer, 6...Divider. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 79 - Figure 2 Figure 3 θα Continued from page 1 0 Inventor: Isao Homma, Tokyo Gas Co., Ltd., 1-2-16 Yaesu, Chuo-ku, Tokyo Applicant: Tokyo Gas Co., Ltd. Yaesu, Chuo-ku, Tokyo 1-2-16 1-chome No. 16 1985 6 ゛ Patent Application No. 180690 2 Name of the invention Gas flow rate measuring device 3 Person who corrects sleeves Relationship with the case q.1' Permission issued
Appointment Address 1006 Kadoma, Kadoma City, Osaka Name (582) Matsushita Electric Industrial Co., Ltd. Address
2, Matsushita Electric Industrial Co., Ltd., 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture, Claims: A flow rate sensor is provided in the gas supply line, and a flow rate pulse is output as a signal according to the gas flow rate.The pulse is counted by a counter. , the gas flow rate is measured by the timer of this counter, divided by a divider which takes the output of the counter as the dividend input and the output of the timer as the divisor input, and uses the output of the divider as the flow rate signal and output signal. measuring device.

Claims (1)

【特許請求の範囲】[Claims] ガス流量に応じて電気パルスを出力する流量パルス発生
器と、前記流量パルスを計数するカウンタと、前記カウ
ンタの計数開始時より所定時間経過した後、新だな流量
パルスが前記カウンタに入力されるまでの時間を計測す
るタイマと、前記カウンタ出力を被除数入力とし、前記
タイマ出力を除数入力とする除算器とよりなり、前記徐
算器出力を、流量信号としての出力信号とするガス流量
測定装置。
a flow rate pulse generator that outputs electrical pulses in accordance with the gas flow rate; a counter that counts the flow rate pulses; and a new flow rate pulse that is input to the counter after a predetermined period of time has elapsed from the start of counting by the counter. A gas flow rate measuring device comprising: a timer for measuring the time until the end; a divider using the counter output as the dividend input and the timer output as the divisor input, and using the divider output as an output signal as a flow rate signal. .
JP57180690A 1982-10-14 1982-10-14 Apparatus for measuring gas flow amount Granted JPS5970916A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57180690A JPS5970916A (en) 1982-10-14 1982-10-14 Apparatus for measuring gas flow amount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57180690A JPS5970916A (en) 1982-10-14 1982-10-14 Apparatus for measuring gas flow amount

Publications (2)

Publication Number Publication Date
JPS5970916A true JPS5970916A (en) 1984-04-21
JPH0461285B2 JPH0461285B2 (en) 1992-09-30

Family

ID=16087599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57180690A Granted JPS5970916A (en) 1982-10-14 1982-10-14 Apparatus for measuring gas flow amount

Country Status (1)

Country Link
JP (1) JPS5970916A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123670A (en) * 1976-04-09 1977-10-18 Takeda Riken Ind Co Ltd Digital frequency measuring device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123670A (en) * 1976-04-09 1977-10-18 Takeda Riken Ind Co Ltd Digital frequency measuring device

Also Published As

Publication number Publication date
JPH0461285B2 (en) 1992-09-30

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