JPH0115802B2 - - Google Patents
Info
- Publication number
- JPH0115802B2 JPH0115802B2 JP55111991A JP11199180A JPH0115802B2 JP H0115802 B2 JPH0115802 B2 JP H0115802B2 JP 55111991 A JP55111991 A JP 55111991A JP 11199180 A JP11199180 A JP 11199180A JP H0115802 B2 JPH0115802 B2 JP H0115802B2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- integrating
- circuit
- pulse signal
- value
- 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
- 238000001514 detection method Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 230000010354 integration Effects 0.000 description 13
- 230000015654 memory Effects 0.000 description 12
- 230000001186 cumulative effect Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details 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
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
- G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
- G01F15/0755—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Details Of Flowmeters (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Description
【発明の詳細な説明】
本発明は、所定時間当りの消費量が所定値以下
の時の積算消費量又は時間を検出する微少流量
（微少消費量）検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a minute flow rate (minor consumption amount) detection device that detects the cumulative consumption amount or time when the consumption amount per predetermined time is less than or equal to a predetermined value.
説明を簡単にするために、以下、水道メータを
例にとつて説明すると、最近の水道メータは、計
量精度が向上し、例えば20／ｈ程度の流量をも
正確に計量し得るようになつた。20／ｈ程度の
流量と言えば、蛇口から約30cm下つた所で水柱が
水滴に分離されて滴下する程度の流量であるが、
この程度で漏水していた場合、１ケ月間の漏洩積
算流量は、20（）×24（時間）×30（日）＝14400
＝14.4m3となる。 To simplify the explanation, I will use a water meter as an example. Recent water meters have improved measurement accuracy and are now able to accurately measure flow rates of, for example, 20/h. . A flow rate of about 20/h is such that the water column separates into water droplets and drips about 30 cm below the faucet.
If water leaks to this extent, the cumulative leakage flow rate for one month is 20 () x 24 (hours) x 30 (days) = 14400.
= 14.4m3 .
一方、一般家庭における水道の使用状態は、１
週間を平均すると１日約２時間程度であり、この
時間、水道メータが20／ｈ以下の流量を積算計
量できなくとも、それによる１ケ月間の計量不能
積算流量は
20（）×２（時間）×30（日）＝1200＝1.2m3
となり、前記漏洩積算流量の1/10以下程度であ
る。 On the other hand, the status of water supply in general households is 1.
Averaged over a week, it is about 2 hours a day, and even if the water meter cannot cumulatively measure a flow rate of less than 20/h during this time, the cumulative flow rate that cannot be measured for one month is 20 () x 2 (hours). ) x 30 (day) = 1200 = 1.2m3 , which is about 1/10 or less of the cumulative leakage flow rate.
上述のように考えた場合、水道メータの計量精
度を向上させることは勿論大切なことではある
が、それに加えて漏水についても考慮する必要が
ある。 Considering the above, it is of course important to improve the measurement accuracy of water meters, but in addition, it is also necessary to consider water leakage.
本発明は、上述のごとき実情に鑑みてなされた
もので、被測定対象である水又は電力の漏れであ
る微少流量を確実に検出する微少流量検出装置を
提供することを目的とする。以下、図面を参照し
ながら詳細に説明する。 The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a minute flow rate detection device that reliably detects a minute flow rate that is a leakage of water or electric power as an object to be measured. A detailed description will be given below with reference to the drawings.
第１図は、本発明による水道メータの一実施例
を説明するためのブロツク線図で、図中、１は水
の使用量に比例した回転運動をする羽根車、２は
羽根車１と一体的に回転運動する永久磁石、３は
リードスイツチ等の磁気センサ、４はインターフ
エース、５は流量・回転数変換回路、６は積算カ
ウンタ、７は表示部で、これら羽根車１乃至表示
部７は従来の水道メータと全く同様にして水の使
用量を積算、表示する。また、１０は積算カウン
タ、１１はフリツプフロツプ回路、１２はタイマ
ー、１３は遅延回路、１４は流量下限値設定回
路、１５は比較回路、１６及び１７はアンドゲー
ト回路、１８は加算器、１９は下限流量積算メモ
リーで、流量・回転数変換回路５からは、第２図
ａに示すように、被測定流量に応じたパルス出力
信号が得られ、このパルスが積算カウンタ６にて
計数されるとともに、積算カウンタ１０及びフリ
ツプフロツプ回路１１に加えられる。一方、タイ
マー１２は、第２図ｂに示すように、一定周期Ｔ
のパルス信号t1，t2…を出力しており、このパル
ス信号がアンドゲート回路１６の一方の入力端子
に加えられるとともに、遅延回路１３を通して
（第２図ｃ参照）積算カウンタ１０及びフリツプ
フロツプ回路１１に加えられ、積算カウンタ１０
及びフリツプフロツプ回路１１をリセツトする。
ただし、前回のパルス周期Ｔの間に流量・回転数
変換回路５から出力信号がない時は、フリツプフ
ロツプ回路１１はリセツト状態になつているの
で、フリツプフロツプ回路１１はそのリセツト状
態を維持する。従つて、その後、流量・回転数変
換回路５からパルス信号p1，p2…poが出力される
と、積算カウンタ１０はそのパルスを計数し、比
較回路１５においてその積算値（第２図ｆ参照）
を流量下限値設定回路１４の設定値（第２図ｅ参
照）と比較し、積算カウンタ１０の出力が設定値
を越した時にアンドゲート回路１６を閉じ（第２
図ｇ参照）、設定値を越さない場合すなわち被測
定流量が下限流量以下の場合はアンドゲート回路
１６を開いている（第２図ｈ参照）。その後、タ
イマー１２から次のパルスt2が発生されると、前
記と同様にして積算カウンタ１０及びフリツプフ
ロツプ回路１１がリセツトされるが、その際、ア
ンドゲート回路１６が開いている時、すなわち、
計測期間Ｔの間における積算カウンタ１０の積算
値が流量下限値設定回路１４の設定値より小さい
時は、タイマー１２からのパルス信号によつて加
算器１８が作動され、積算カウンタ１０の積算値
が流量積算メモリー１９に積算記憶され、一方、
アンドゲート回路１６が閉じている時すなわち積
算カウンタ１０の積算値が設定値より大きい時は
加算器１８は作動されない。従つて、流量積算メ
モリー１９には流量下限値設定回路１４によつて
設定された値以下の流量の時の積算値のみが記憶
される。この流量積算メモリー１９の値は比較回
路２０において設定回路２１の設定値と比較さ
れ、流量積算メモリー１９の値が設定値以上にな
つた時にフリツプフロツプ回路２５を作動し、そ
の結果を表示部７或いはメモリー２７に出力す
る。前述のように、一定周期Ｔの間における被測
定流量が設定値以下の時は、アンドゲート回路１
６は開かれており、かつ、周期Ｔの間に流量・回
転数変換回路５から１つでも出力パルスが発生さ
れると、すなわち、被測定流量が０でない時は、
アンドゲート回路１７が開かれているので、換言
すれば、周期Ｔの間における被測定流量が設定値
以下でかつ０でない時は、アンドゲート回路１７
が開かれているので、タイマー１２からの出力パ
ルスはアンドゲート回路１６，１７を通して時間
カウンタ２１に供給され、該時間カウンタ２１に
よつて積算計数される（第２図ｋ参照）。しかし、
周期Ｔの間における被測定流量が設定値以上の時
は、アンドゲート回路１６が閉じられ、また、流
量が０の時は、アンドゲート回路１７が閉じられ
るので、この時は、タイマー１２からの出力パル
スは時間カウンタ２２に計数されない。斯様に、
時間カウンタ２２は、被測定流量が０でなくかつ
設定値以下の時の時間を積算計測するが、この積
算計測値は比較回路２３において設定回路２４か
らの設定値と比較され、設定値以上になつた時に
フリツプフロツプ回路２６を作動し、その結果を
表示部７或いはメモリー２７に出力する。メモリ
ー２７には、積算カウンタ６、比較回路２０，２
３等の出力が記憶されており、必要により、電文
組立回路２９、モデム３０等を伝送制御回路２８
によつて制御して遠隔伝送する。なお、以上に本
発明の一実施例について説明したが、本発明は上
記実施例に限定されるものではなく、例えば、タ
イマー１２をプログラマブルにしたり、下限流量
積算メモリー１９、時間カウンタ２２の出力をそ
のまゝ表示或いは伝送するようにすることも可能
であり、更には、これら下限流量積算メモリー１
９、時間カウンタ２２、及び、フリツプフロツプ
回路２５，２６等を手動又は自動的にリセツトす
るようにすることも可能である。 FIG. 1 is a block diagram for explaining one embodiment of the water meter according to the present invention. In the figure, 1 is an impeller that rotates in proportion to the amount of water used, and 2 is integrated with the impeller 1. 3 is a magnetic sensor such as a reed switch, 4 is an interface, 5 is a flow rate/rotational speed conversion circuit, 6 is an integration counter, and 7 is a display section. integrates and displays water usage in exactly the same way as a conventional water meter. Further, 10 is an integration counter, 11 is a flip-flop circuit, 12 is a timer, 13 is a delay circuit, 14 is a flow rate lower limit setting circuit, 15 is a comparison circuit, 16 and 17 are AND gate circuits, 18 is an adder, and 19 is a lower limit In the flow rate integration memory, a pulse output signal corresponding to the flow rate to be measured is obtained from the flow rate/rotational speed conversion circuit 5 as shown in FIG. 2a, and this pulse is counted by the integration counter 6. It is added to an integration counter 10 and a flip-flop circuit 11. On the other hand, the timer 12 operates at a constant period T, as shown in FIG. 2b.
pulse signals t 1 , t 2 . 11, and the integration counter 10
and resets the flip-flop circuit 11.
However, when there is no output signal from the flow rate/rotational speed conversion circuit 5 during the previous pulse period T, the flip-flop circuit 11 is in the reset state, so the flip-flop circuit 11 maintains the reset state. Therefore, when the pulse signals p 1 , p 2 , . f)
is compared with the set value of the flow rate lower limit value setting circuit 14 (see Figure 2 e), and when the output of the integration counter 10 exceeds the set value, the AND gate circuit 16 is closed (second
If the set value is not exceeded, that is, if the flow rate to be measured is below the lower limit flow rate, the AND gate circuit 16 is opened (see Figure 2 h). Thereafter, when the next pulse t2 is generated from the timer 12, the integration counter 10 and the flip-flop circuit 11 are reset in the same manner as described above, but at that time, when the AND gate circuit 16 is open, that is,
When the cumulative value of the cumulative counter 10 during the measurement period T is smaller than the set value of the flow rate lower limit value setting circuit 14, the adder 18 is activated by the pulse signal from the timer 12, and the cumulative value of the cumulative counter 10 is The total flow rate is stored in the flow rate totalization memory 19, and on the other hand,
When the AND gate circuit 16 is closed, that is, when the cumulative value of the cumulative counter 10 is greater than the set value, the adder 18 is not activated. Therefore, only the integrated value when the flow rate is less than the value set by the flow rate lower limit value setting circuit 14 is stored in the flow rate integration memory 19. The value of this flow rate accumulation memory 19 is compared with the set value of the setting circuit 21 in a comparator circuit 20, and when the value of the flow rate accumulation memory 19 exceeds the set value, the flip-flop circuit 25 is activated and the result is displayed on the display section 7 or Output to memory 27. As mentioned above, when the flow rate to be measured during the constant period T is below the set value, the AND gate circuit 1
6 is open, and if even one output pulse is generated from the flow rate/rotational speed conversion circuit 5 during the period T, that is, when the measured flow rate is not 0,
Since the AND gate circuit 17 is open, in other words, when the flow rate to be measured during the period T is below the set value and is not 0, the AND gate circuit 17
is open, the output pulses from the timer 12 are supplied to the time counter 21 through the AND gate circuits 16 and 17, and are integrated and counted by the time counter 21 (see FIG. 2k). but,
When the flow rate to be measured during period T is equal to or higher than the set value, the AND gate circuit 16 is closed, and when the flow rate is 0, the AND gate circuit 17 is closed. Output pulses are not counted by time counter 22. In this way,
The time counter 22 cumulatively measures the time when the measured flow rate is not 0 and is below the set value, but this cumulative measured value is compared with the set value from the setting circuit 24 in the comparator circuit 23, and when the flow rate exceeds the set value. When this happens, the flip-flop circuit 26 is activated and the result is output to the display section 7 or memory 27. The memory 27 includes an integration counter 6 and comparison circuits 20 and 2.
3 etc. outputs are stored, and if necessary, the message assembly circuit 29, modem 30 etc. can be transferred to the transmission control circuit 28.
control and remote transmission. Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, the timer 12 may be made programmable, or the outputs of the lower limit flow accumulation memory 19 and the time counter 22 may be made programmable. It is also possible to display or transmit it as is, and furthermore, these lower limit flow rate accumulation memories 1
9. It is also possible to reset the time counter 22, flip-flop circuits 25, 26, etc. manually or automatically.
以上の説明から明らかなように、本発明による
と、被測定対象である水又は電力の漏れである微
少流量を確実に検出することができる。 As is clear from the above description, according to the present invention, it is possible to reliably detect a minute flow rate, which is a leakage of water or electric power, which is an object to be measured.
第１図は、本発明による積算メータの一実施例
を説明するための電気回路図、第２図は、第１図
の回路の動作説明をするためのタイムチヤートで
ある。
１……羽根車、２……永久磁石、３……リード
スイツチ、４……インターフエース、５……流
量・回転数変換回路、６……積算カウンタ、７…
…表示部、１０……積算カウンタ、１２……タイ
マー、１３……遅延回路、１４……流量下限値設
定回路、１５……比較回路、１８……加算器、１
９……下限流量積算メモリー、２０，２３……比
較回路、２１，２４……基準値設定回路、２７…
…メモリー、２８……伝送制御回路、２９……電
文組立回路、３０……モデム。
FIG. 1 is an electric circuit diagram for explaining an embodiment of the integrating meter according to the present invention, and FIG. 2 is a time chart for explaining the operation of the circuit shown in FIG. DESCRIPTION OF SYMBOLS 1... Impeller, 2... Permanent magnet, 3... Reed switch, 4... Interface, 5... Flow rate/rotation speed conversion circuit, 6... Integration counter, 7...
... Display section, 10 ... Integration counter, 12 ... Timer, 13 ... Delay circuit, 14 ... Flow rate lower limit value setting circuit, 15 ... Comparison circuit, 18 ... Adder, 1
9... Lower limit flow rate integration memory, 20, 23... Comparison circuit, 21, 24... Reference value setting circuit, 27...
...Memory, 28...Transmission control circuit, 29...Telegram assembly circuit, 30...Modem.
Claims (1)
費量を検出する微少流量検出装置において、消費
した消費量に応じた数の第１のパルス信号を出力
するパルス信号出力手段と、前記第１のパルス信
号を所定時間積算する第１の積算手段と、前記第
１の積算手段の積算値が前記所定時間内で所定数
以下であることを検知して第２のパルス信号を発
生する第１の検出手段と、前記第２のパルス信号
を積算する第２の積算手段と、前記第２の積算手
段が所定値以上になつたことを検出する第２の検
出手段とを備え、前記第２の検出手段の出力によ
り消費量が微少流量であることを検出することを
特徴とする微少流量検出装置。 ２ 所定時間当りの消費量が所定値以下の時の消
費量を検出する微少流量検出装置において、消費
した消費量に応じた数の第１のパルス信号を出力
するパルス信号出力手段と、前記第１のパルス信
号を所定時間積算する第１の積算手段と、前記第
１の積算手段の積算値が前記所定時間内で０でな
く、かつ所定数以下であることを検知して第２の
パルス信号を発生する第１の検出手段と、前記第
２のパルス信号が出力される毎に前記第１の積算
手段の積算値を積算する第３の積算手段と、前記
第３の積算手段が所定値以上になつたことを検出
する第３の検出手段とを備え、前記第３の検出手
段の出力により消費量が微少流量であることを検
出することを特徴とする微少流量検出装置。[Claims] 1. A pulse signal that outputs a number of first pulse signals corresponding to the consumed amount in a minute flow rate detection device that detects the amount consumed when the amount consumed per predetermined time is less than or equal to a predetermined value. an output means; a first integrating means for integrating the first pulse signal for a predetermined time; a first detecting means for generating a pulse signal; a second integrating means for integrating the second pulse signal; and a second detecting means for detecting that the second integrating means has exceeded a predetermined value. A minute flow rate detection device, characterized in that it detects that the consumption amount is a minute flow rate based on the output of the second detection means. 2. In a minute flow rate detection device that detects a consumption amount when the consumption amount per predetermined time is less than or equal to a predetermined value, the pulse signal output means outputs a number of first pulse signals corresponding to the consumption amount; a first integrating means for integrating one pulse signal for a predetermined time; and a second integrating means detecting that the integrated value of the first integrating means is not 0 within the predetermined time and is equal to or less than a predetermined number; a first detecting means for generating a signal; a third integrating means for integrating the integrated value of the first integrating means each time the second pulse signal is output; A minute flow rate detection device, comprising a third detection means for detecting that the amount exceeds a value, and detects that the consumption amount is a minute flow rate based on the output of the third detection means.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11199180A JPS5735712A (en) | 1980-08-14 | 1980-08-14 | Integrating meter |
| US06/208,318 US4437336A (en) | 1979-11-20 | 1980-11-19 | Device of integrating a small amount of flow of fluid for leak detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11199180A JPS5735712A (en) | 1980-08-14 | 1980-08-14 | Integrating meter |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63036349A Division JPS63241309A (en) | 1988-02-18 | 1988-02-18 | Integrating meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5735712A JPS5735712A (en) | 1982-02-26 |
| JPH0115802B2 true JPH0115802B2 (en) | 1989-03-20 |
Family
ID=14575199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11199180A Granted JPS5735712A (en) | 1979-11-20 | 1980-08-14 | Integrating meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5735712A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58205812A (en) * | 1982-05-25 | 1983-11-30 | Mitsubishi Electric Corp | Diagnosing apparatus for plant |
| JPH084628Y2 (en) * | 1989-09-21 | 1996-02-07 | 三菱電機株式会社 | Separate type electricity meter |
| CN105759855B (en) * | 2016-02-25 | 2018-06-29 | 玉环县红日阀门有限公司 | The micro- leakage monitoring device of water pipe and its micro- leakage monitoring method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5382454A (en) * | 1976-12-28 | 1978-07-20 | Tokyo Gas Co Ltd | Detecting apparatus for momentary flow rate from volume pulse signals |
| JPS5383773A (en) * | 1976-12-29 | 1978-07-24 | Osaki Denki Kougiyou Kk | Wattthour meter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741754Y2 (en) * | 1974-04-10 | 1982-09-13 | ||
| JPS5466593U (en) * | 1977-10-19 | 1979-05-11 |
-
1980
- 1980-08-14 JP JP11199180A patent/JPS5735712A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5382454A (en) * | 1976-12-28 | 1978-07-20 | Tokyo Gas Co Ltd | Detecting apparatus for momentary flow rate from volume pulse signals |
| JPS5383773A (en) * | 1976-12-29 | 1978-07-24 | Osaki Denki Kougiyou Kk | Wattthour meter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5735712A (en) | 1982-02-26 |
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