CN1171030C - Method and measuring probe for carrying out measurements in a water supply system - Google Patents
Method and measuring probe for carrying out measurements in a water supply system Download PDFInfo
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- CN1171030C CN1171030C CNB998169692A CN99816969A CN1171030C CN 1171030 C CN1171030 C CN 1171030C CN B998169692 A CNB998169692 A CN B998169692A CN 99816969 A CN99816969 A CN 99816969A CN 1171030 C CN1171030 C CN 1171030C
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- measuring probe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
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- 230000001939 inductive effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000003651 drinking water Substances 0.000 description 8
- 235000012206 bottled water Nutrition 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
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- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000003894 drinking water pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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Classifications
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- 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
- G01M3/2815—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 using pressure measurements
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- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
- G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a measuring probe for a water supply network (13), wherein measuring elements are combined for outputting measured parameters relating to the flow, i.e. the flow rate and direction, the water pressure and the flow noise, all of which measuring elements can be connected or can be connected to a data acquisition unit by means of wireless transmission, a modem or a cable connection. The measuring probes are permanently installed at critical locations (10) of the water supply network (13) and at very different measuring points (11) that follow each other as closely as possible, and can therefore contribute to a quick and accurate finding of the leakage points for the point targets by providing all the required data and a continuous monitoring.
Description
Technical field
The present invention relates to a kind of in order to determine in the water system that water loss and leakage point location use measuring probe to implement the method for measuring and relate to a kind of measuring probe of implementing the method.
Background technique
Owing to pipeline breaking or owing to the blow-by position in water pipe or water user's zone, the big loss of local appearance.Because it is underground that the pipeline of water supply network is laid on usually, thus these leakage losses seldom can find immediately, be not all the more so under the excessive situation especially in each leakage loss.These leakage losses mainly are that water yields that is drawn by the water yield of supplying and the difference of wanting the water yield of user-pay.
By known a kind of method and a kind of measuring well that can be used for the method that is used in multiloop pipe network internal leakage location of EP-A0009263.Build some checkpoints here, can be simultaneously in these checkpoints and be that whole pipe-line systems are regular and detect flow characteristic simultaneously always through the short time of regulation.Own used inspection shaft can be established as in all checkpoints, also existing pipeline must be disconnected, for this reason so that guiding valve, measuring equipment or water meter can be installed.By this equipment and the method taked here,, can not search particularly thus and leak and fault localization accurately though the first step should be the leakage loss location in large area.Also have a shortcoming to be, for water system is equipped with this equipment afterwards, owing to not only be used for building but also being used for the required expense of long-time running, success will follow beyond doubt.
In addition, EP-A-0009263 also provides the prior art as the basis, in leakage loss and the leakage positioning in these pipelines in order to monitor pipeline under the situation of petroleum pipeline, knownly in the approach of pipeline, the checkpoint is set, and assess related infeed fluid that these pipelines discharge again from these pipelines again in the checkpoint detected flow characteristic, as flow, flow to, hydrodynamic noise, hydrodynamic pressure etc., so that then when determining to leak by autotelic measurement and location measure, be determined at the position of two line segments between this checkpoint and then get rid of.This method for example by " International Z.3R; 15.Jg. (Juli 1976) is H.7; S.375-381 ", " Z.T 11 (Juni 1970) Nr.6, S.213-215 ", " Z. l-Zeitschrift f ü r dieMineral lwirt schaft (1973) S.2-6 " be known.(Publication Year that corresponding EP-B-0009263 provides for last-mentioned that piece document is 1979 rather than 1973).Do not have one piece to disclose a kind of method or a kind of measuring probe in these documents, they can detect above mentioned all flow characteristics.Exactly, each piece document relates in the described flow characteristic one or two, for example flow and pressure or the flow direction and pressure etc.Can in petroleum pipeline, detect leakage though pay many expenses in this way, in water system, but can not accomplish this point, because numerous branch is arranged there.Press EP-A-0 009 263, constitute bottom pipe network (Unter-Leitungsnetze) in order to address this problem.Therefore needing a kind of method and a kind of measuring probe, can be leakage positioning in water system by them more reliably, need not to employ the bottom pipe network.
Summary of the invention
The objective of the invention is, create method and a kind of measuring probe that is used to implement the method for the described type of a kind of preface, can be in the field of water system analyze exactly and the accurate location of leakage point by the present invention, meanwhile, measuring probe should be able to be installed easily.
Reach by the method for this purpose of the present invention by the described type of preface, wherein these measuring probes are pressed rule or irregular interval or are implemented to flow that is the flow and the flow direction at measuring point continuously, the measurement of hydraulic pressure and hydrodynamic noise, so that consuming with zero by system analyzer is that the basis is analyzed, and by relevant hydraulic pressure, the data of hydrodynamic noise and flow and the flow direction, approximate definite leakage point, wherein, the noise transducer of each measuring probe is connected on the noise correlator one by one, so that finally be implemented between two adjacent measuring probes for point target leakage positioning accurately.
Therefore, employing can detect all three kinds of parameters by each measuring probe by method of the present invention, that is flow (flow and the flow direction), hydraulic pressure and hydrodynamic noise, the method known with the document of being mentioned already by the front is different, always can only assess two in these parameters there at most, whether the detection that does not solve these parameters is there carried out at same measuring point fully.
Employing drops to minimum level by the loss of the potable water that method of the present invention can be crossed the especially purified treatment of preciousness, and this potable water is relatively large sometimes losing in water pipe.But be used for equipment and also be used to implement measure and analyze the expense expenditure that is taken place remaining in the scope of justification.Inquiry can periodically be undertaken by reader in set terminal.Each measuring probe also can be installed on not wiring ground, only just directly is connected with data acquisition unit when needed or when routine measurement.Needed on-time, especially Ping Jing day and night time, be no more than 30 to 60 minutes usually.Compare with repeatedly measuring, to implement duplicate measurements at synchronization water loss analysis very accurately and the especially analysis of " accurate zero consumes (Quasi-Nullverberauch) " can be provided.Because a plurality of measuring probes are each other by suitable spacing with also settle on branch line, so by record hydraulic pressure and hydrodynamic noise and the flow direction and flow, can be similar to definite leakage point.Then by means of the noise receiver in being combined in or sound receiver and with the noise correlator of their couplings, can finish between two measuring probes for point target leakage point location accurately.
For example all measuring probes can be connected with system analyzer or data acquisition unit by terminal equipment, wireless, modulator-demodulator or cable, inquire about and assess the measuring cell of each interested measuring probe in this case, in the area of supposition or by rule and can be by hand or connect the analysis of ground enforcement water loss automatically.That is to say to have various possibilities, directly in master station or access data on the spot.Especially in the winter time, because well lid, slide valve cover etc. are frozen, these work still can be set out and noly implement difficultly by being installed in above the ground terminal equipment.The crucial here place that only is to determine exactly leakage loss between two measuring probes that place need only be repaired this and sews and excavate a little zone whereby for final.
By in the method for the present invention, when being installed, many measuring probes also provide some very favorable possibilities.Therefore suggestion, the mode of press random generator (Zufallsgenerator) especially is located at the assessment apparatus of master station, as data collector or noise correlator, alternately with by the water loss and the leakage point of the compartment analysis grid zones of different of repetition.Can observe water supply network continuously thus, so that can prevent a large amount of leakage loss of leakage loss or quick identification whereby.Long-term analysis by being undertaken by rule or continuous brokenly duplicate measurements can the one or more measuring probe survey data of immediate response depart from significantly.
Implement the used measuring probe of the method, its characteristics are to have made up some measuring cells in measuring probe, be used to export about flow, the measurement parameter of pressure and hydrodynamic noise, all these measuring cells can be by being connected with system analyzer or data acquisition unit by wireless transmission, modulator-demodulator or cable joining.
Adopt this measuring probe to establish measuring point with just might making the water system fine mesh, thereby also can find out location of leak fine mesh.Only may draw approximate gratifying result in this case hard so far by using diverse system's employing method of measurement one by one.The measuring cell that adopts the present invention can provide all to need at all measuring points thus, makes up all measuring points and method of measurement, can draw the location of leak of being sought exactly fast and for point target.
If advise in an advantageous manner by the present invention, measuring cell is contained in the sleeve shape screw rod, screw rod screws in and maybe can screw in the saddle joint (Anbohrschelle), has then created a kind of possibility of the best, and measuring probe can be packed at any time or afterwards is in the pipe-line system of pressure state.For this reason without any need for special use because the inspection shaft that necessary guiding valve etc. must can enter all the time, on the contrary, as long as lay corresponding for example just much of that towards the cable on ground, then, further be connected to each other by a complete set of connection set of terminal equipment, wireless, modulator-demodulator or clear-cut and measuring probe on ground.
A favourable measure is, three measuring cells are combined in the screw rod.That is to say can minimum space mounting was necessary helps the measuring cell measuring best and assess.Here, the measuring cell of Liu Donging can be inductance or measurement by capacitance element.
Because be in capable state for the national games by possibility pipe-line system of installing provided by the invention by saddle joint, just be in the total head state, so advantageously the outside thread of screw rod is a kind of fine thread or a kind of screw thread that allows to be installed in the water pipe that is in pressure state.Therefore, although the antagonism that is stressed still can screw in measuring probe easily.
For good construction possibility is provided, advise that the measuring probe that is designed to screw rod has an instrumental purpose position of pressing the screw head type in one end thereof when measuring probe is installed.Therefore simply mode is settled the instrument that is used to transmit necessary moment of torsion.
By the design by measuring probe of the present invention, it can directly be contained on the pipeline and therefore can be retained in any place of pipeline, or also can be installed in the already present inspection shaft.So different possibilities that provide data to switch through.Advise on measuring probe, establishing a cable joining that is used to measure lead for this reason, or establish a plug assembly that is used to connect one or more system analyzer.
Many possibilities that can not provide are so far provided by structural design just by measuring probe of the present invention.Therefore suggestion, these measuring probes preferably are installed in water system especially on a plurality of measuring points of stipulating of potable water water supply network and forever be placed in wherein by saddle joint.Lay the pipeline of water or when existing pipe-line system is reequiped, after once installing, then provide the possibility of the continuous analysis water system of the best new.
Description of drawings
Further specify embodiments of the invention again by accompanying drawing below.Wherein
Fig. 1 schematically illustrates by measuring probe of the present invention;
The saddle joint biopsy cavity marker devices oblique drawing that Fig. 2 is common, measuring probe is installed in wherein;
Fig. 3 schematically illustrates a pipeline district in water system.
Embodiment
The measuring probe that is used for water supply network 1 shown in Figure 1 has made up some measuring cells, particularly be the probe 2 that is used for flow measurement, be used to export pressure transducer 3 and noise receiver 4 about the measurement parameter that flows, that is output flow and measurement parameters such as the flow direction, hydraulic pressure and hydrodynamic noise.These measuring cells can connect by transmitting set by terminal equipment, wireless, modulator-demodulator or cable joining and maybe can be connected on system analyzer or the data acquisition unit 12, or connect when relating to the noise receiver and maybe can be connected on the correlator.That is to say that key is in a measuring probe measuring cell that combination is all, these measuring cells all are for leakage positioning best and thereby monitor best and to analyze water supply network needed.
These measuring cells are packed in the sleeve shape screw rod 5, and screw rod 5 screws in and maybe can screw in the saddle joint 6.Therefore if do corresponding outfit and still can install and measure probe 1 easily even should be water system in back for many years.Also can correspondingly progressively reconstruct water system in this way, because can implement at any time and in any place by the installation of saddle joint with measuring probe.
Advantageously, the probe 2 that is used for flow measurement is designed to the inductance type flowmeter.Pressure transducer 3 and noise receiver 4 can be designed to known structure member, but they must be combined in the screw rod.The specific constructive form of these measuring cells that made up is unimportant.Can be that some are made and the diverse measuring cell of working method, but they can be provided as the required data of essential analysis with matching each other.
On measuring probe 1, be provided with one or more and measure lead 9 outlets.Cable can for example be guided terminal equipment on the ground into.Therefore also consecutive access survey data on the spot need not at first to take away well lid.But also can 1 of measuring probe or just in being convenient to approaching terminal equipment, establish the plug assembly that is used to connect one or more system analyzer or data acquisition unit 12 on one's body.
By Fig. 3, the measure probes 1 with all measuring cells in being combined in are installed in water supply network 13 especially on the key position 10 and many measuring points of stipulating 11 of potable water water supply network.If they are not installed in newly-built water supply network fashion, then these measure probes 1 also can be provided with by saddle joint 6 is installed afterwards.Therefore, measure probe 1 has constituted a fixing constituent element of continuous use and forever has been placed in one in water supply network 13.Measure probe 1 is connected on evaluating system or the one or more data acquisition unit 12 by measurement lead 14 or by wireless or by modulator-demodulator, or can be connected with them more when needed.
In order under the situation of using measure probe 1, to implement to compare and measure to determine the leakage loss of water in the water system and the location of leakage point, by the measure probe 1 that continues to be installed in key position 10 and/or measuring point 11 places, where necessary under the situation of part or lasting connection noise receiver 4, press rule or irregular interval or implement continuously to measure and flow and pressure, analyze by evaluating system or data acquisition unit 12, wherein especially also be provided with noise correlator 12.Therefore can determine " accurate zero consumes ".These are similar to and determine a leakage position about the data of hydraulic pressure and hydrodynamic noise and the flow and the flow direction.Noise receiver 4 in each measure probe 1 can be connected with the noise correlator one by one, so as finally to be implemented between two adjacent measure probes 1 and thereby between adjacent key position 10 and/or measuring point 11 for point target leakage positioning accurately.But the gap ratio of measure probe that for this reason needs to be provided with noise receiver 4 is less.Implement the type that the relevant possibility of noise depends on water system pipes.For plastic piping, the spacing of measure probe must than the casting control pipeline in little.
All measure probes 1 are connected with system analyzer or data acquisition unit 12 by terminal equipment, wireless, modulator-demodulator or cable, wherein, inquire about and assess the measuring cell of each interested measure probe 1.Can maybe can implement the analysis of water loss thus to the zone of supposing by rule and manual or automatic connection ground.
By this special design of measure probe 1 and about the measurement and the appraisal procedure of obtaining data, also provide other possibilities just, monitored the goods and materials potable water of this preciousness constantly.For example, can be by the mode of random generator, in system analyzer that is located at master station or data acquisition unit 12, alternately with by the interval of repeating, analyze the water loss and the leakage point of water supply network 13 zoness of different.
Can advantageously in the supplying drinking water system in area, use by measure probe 1 of the present invention and method, because the there is often owing to leak or because packing less valve, (dwelling house, office and industry and farm etc.) cause huge water loss sometimes at supplying unit itself.These leakage points and thereby water loss also just when flood can be in sight, just discover usually.Here, for measurement, only one perhaps also in the different location, and for example the flowmeter of locating to install at Your Majesty road point, dwelling house joint etc. is not enough.
Advised a kind of loss measuring equipment here, it is installed in the water system and forever is installed in the there by multiple to many reshuffling.So can in relatively short line segments, determine, whether current or water flow (and along regulation flow direction) or the noise of regulation or the pressure change in pipeline, thus the routine that surpasses the day and night time of regulation shows and might have water loss.That is to say and to check possibility for each water factory creates fine mesh ground.Measuring probe set in water system is many more, and continuous monitoring can be carried out accurately more.
Therefore at main-supply, endless tube with on pipeline, in narrow webbed region, install fixing measuring point by many reprovisions.When newly laying pipeline, also can lay corresponding connecting pipeline together.In any case remaining, measuring point is present in the infield.Also can remote inquiry or for example be connected with central control station by modulator-demodulator, so perhaps only need a computer installation or a data collector 12 for the data of assessment of the measurement result.Therefore also can for example check whole special section again and again, so that can determine whether to exist common in the past flow that change has taken place at night.Certainly, desirable layout is that all measuring points can be used in order to measure mutual combination in any from central control station.
Each measure probe 1 can be contained in the pipe-line system by saddle joint by the simplest mode.Because this pipe-line system has diverse caliber, thus adopt those can with corresponding flue tools cooperating at pressure or the saddle joint installed at pressure-less state.Measure probe 1 also can spin by the adapter of all with different saddle joint couplings.After measure probe 1 is installed, no longer may be directly near potable water, so there is not the danger of deliberate or unintentional drinking water pollution.
Here relate generally to can continuous review by disposing many measure probes for the measure probe of being advised and the method for being advised, this inspection is not only limited to main line, and especially extend in the narrow reticular structure the more special water loss of main there appearance.Certainly need special design measure probe in this respect, they must be fixedly mounted on the pipeline and should make by simple and economical mode, so that can realize so many measuring point very economically.For more and more valuable potable water and must before water flows to the surface in the somewhere, find leakage point or out of order valve rapidly, then carry out important investment this field planted agent.
Claims (9)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP1999/008076 WO2001031308A1 (en) | 1999-10-26 | 1999-10-26 | Method and measuring head for carrying out measurements in water supply systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1375055A CN1375055A (en) | 2002-10-16 |
| CN1171030C true CN1171030C (en) | 2004-10-13 |
Family
ID=8167476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB998169692A Expired - Fee Related CN1171030C (en) | 1999-10-26 | 1999-10-26 | Method and measuring probe for carrying out measurements in a water supply system |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JP2003513237A (en) |
| CN (1) | CN1171030C (en) |
| AU (1) | AU768095B2 (en) |
| BR (1) | BR9917543A (en) |
| CA (1) | CA2388110A1 (en) |
| CZ (1) | CZ297886B6 (en) |
| EA (1) | EA008420B1 (en) |
| IL (2) | IL149121A0 (en) |
| PL (1) | PL196979B1 (en) |
| WO (1) | WO2001031308A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013178273A (en) * | 2004-10-08 | 2013-09-09 | Itron Inc | Pursuit of vibration in pipeline network |
| DE102006005027A1 (en) * | 2006-02-03 | 2007-08-09 | Gerhard Ritter | Pipeline leakage detecting method for water supply, involves utilizing positive or negative - difference between reference value and measured value for indicating leakage in pipeline |
| JP5019197B2 (en) * | 2006-03-31 | 2012-09-05 | 株式会社東芝 | Water distribution information management device |
| CN100425904C (en) * | 2006-05-11 | 2008-10-15 | 陈宜中 | Electronic touring water pipeline leakage inspection |
| DE102010043482B4 (en) * | 2010-11-05 | 2012-05-24 | Siemens Aktiengesellschaft | Leak detection and leak detection in supply networks |
| WO2014155792A1 (en) * | 2013-03-29 | 2014-10-02 | 日本電気株式会社 | Pipeline anomaly detection data logger device, pipeline structure, and pipeline anomaly detection system |
| CN104535275B (en) * | 2014-12-11 | 2017-04-12 | 天津大学 | Underwater gas leakage amount detection method and device based on bubble acoustics |
| DK3317658T3 (en) * | 2015-07-03 | 2020-11-30 | Kamstrup As | TURBIDITY SENSOR BASED ON ULTRASOUND MEASUREMENTS |
| JP7446856B2 (en) * | 2020-03-03 | 2024-03-11 | ホーチキ株式会社 | Water discharge test measurement system |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2841674C2 (en) * | 1978-09-25 | 1983-09-22 | Heide, Gerhard, Dipl.-Ing., 4006 Erkrath | Procedure for checking for leakage losses as well as the measuring shaft that can be used |
| DE3112829C2 (en) * | 1981-03-31 | 1986-01-16 | Seba-Dynatronic Mess- und Ortungstechnik gmbH, 8601 Baunach | Method and apparatus for locating raw damage with at least one microphone |
| JPS604700A (en) * | 1983-06-24 | 1985-01-11 | Hitachi Ltd | Pipe network break point estimation system |
| DE3336245A1 (en) * | 1983-10-05 | 1985-04-25 | Kraftwerk Union AG, 4330 Mülheim | METHOD FOR DETERMINING A LEAK AT PRESSURE-CONTAINING CONTAINERS AND DEVICE THEREFOR |
| JPS6174998A (en) * | 1984-09-19 | 1986-04-17 | 株式会社 テイエルブイ | Integrating instrument for operating time of steam trap |
| JPH01112440U (en) * | 1988-01-26 | 1989-07-28 | ||
| JPH0432735A (en) * | 1990-05-29 | 1992-02-04 | Fujikura Ltd | Leak point detecting method for underground buried conduit |
| JP3223337B2 (en) * | 1993-03-25 | 2001-10-29 | フジテコム株式会社 | Leak sound detector |
| FR2713764B1 (en) * | 1993-11-10 | 1996-01-12 | Ksb Sa | Fluid measurement device. |
| JP3119986B2 (en) * | 1993-12-07 | 2000-12-25 | 日昌興業株式会社 | Investigation method of leaking point of underground water pipe |
| JP3144971B2 (en) * | 1993-12-16 | 2001-03-12 | 株式会社東芝 | Water leak detection device |
| DE19528287C5 (en) * | 1995-08-02 | 2009-09-24 | Ingenieurgesellschaft F.A.S.T. für angewandte Sensortechnik mit beschränkter Haftung | Method for detecting a leak in a drinking water supply network and arrangement for carrying out the method |
| JPH10267783A (en) * | 1997-03-25 | 1998-10-09 | Akuasu Kk | City water leakage detection method |
| JPH11201812A (en) * | 1998-01-08 | 1999-07-30 | Mitsui Eng & Shipbuild Co Ltd | Method for measuring sound velocity in fluid piping |
| JPH11230849A (en) * | 1998-02-17 | 1999-08-27 | Mitsui Eng & Shipbuild Co Ltd | Device for detecting hydraulic information of fire hydrant and fluid conduit line |
| JP3488623B2 (en) * | 1998-03-04 | 2004-01-19 | 東京都 | Water leak position detecting method and water leak position detecting device |
| JPH11271168A (en) * | 1998-03-25 | 1999-10-05 | Mitsui Eng & Shipbuild Co Ltd | Leakage detection method |
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1999
- 1999-10-26 CN CNB998169692A patent/CN1171030C/en not_active Expired - Fee Related
- 1999-10-26 AU AU10435/00A patent/AU768095B2/en not_active Ceased
- 1999-10-26 IL IL14921299A patent/IL149121A0/en active IP Right Grant
- 1999-10-26 BR BR9917543-6A patent/BR9917543A/en not_active Application Discontinuation
- 1999-10-26 PL PL354457A patent/PL196979B1/en not_active IP Right Cessation
- 1999-10-26 CZ CZ20021226A patent/CZ297886B6/en not_active IP Right Cessation
- 1999-10-26 WO PCT/EP1999/008076 patent/WO2001031308A1/en active IP Right Grant
- 1999-10-26 CA CA002388110A patent/CA2388110A1/en not_active Abandoned
- 1999-10-26 EA EA200200485A patent/EA008420B1/en not_active IP Right Cessation
- 1999-10-26 JP JP2001533399A patent/JP2003513237A/en active Pending
-
2002
- 2002-04-14 IL IL149121A patent/IL149121A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CZ297886B6 (en) | 2007-04-18 |
| PL354457A1 (en) | 2004-01-12 |
| JP2003513237A (en) | 2003-04-08 |
| BR9917543A (en) | 2002-08-13 |
| CZ20021226A3 (en) | 2002-06-12 |
| CN1375055A (en) | 2002-10-16 |
| IL149121A (en) | 2006-09-05 |
| AU768095B2 (en) | 2003-12-04 |
| EA200200485A1 (en) | 2002-10-31 |
| PL196979B1 (en) | 2008-02-29 |
| CA2388110A1 (en) | 2001-05-03 |
| AU1043500A (en) | 2001-05-08 |
| WO2001031308A1 (en) | 2001-05-03 |
| EA008420B1 (en) | 2007-04-27 |
| IL149121A0 (en) | 2002-11-10 |
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