CN113390583B - Water leakage detection method for water meter, water supply system and application method - Google Patents
Water leakage detection method for water meter, water supply system and application method Download PDFInfo
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- CN113390583B CN113390583B CN202110678468.6A CN202110678468A CN113390583B CN 113390583 B CN113390583 B CN 113390583B CN 202110678468 A CN202110678468 A CN 202110678468A CN 113390583 B CN113390583 B CN 113390583B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 453
- 238000001514 detection method Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000000630 rising effect Effects 0.000 claims abstract description 61
- 238000003860 storage Methods 0.000 claims description 23
- 230000000875 corresponding effect Effects 0.000 claims description 13
- 238000011217 control strategy Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000002596 correlated effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000008439 repair process Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/003—Arrangement for testing of watertightness of water supply conduits
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
- E03B7/072—Arrangement of flowmeters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Abstract
The invention discloses a water leakage detection method for a water meter, the water meter, a water supply system and an application method, wherein the water leakage detection method comprises the following steps: acquiring a flow velocity-time curve of the water meter, searching for a rising edge and a falling edge of the flow velocity, removing a flow velocity signal between the starting moment of the rising edge and the ending moment of the falling edge of the flow velocity, and obtaining a filtered flow velocity-time curve; if the instantaneous value of the flow velocity at the appointed moment in the flow velocity-time curve exceeds a first preset threshold value or the average value of the flow velocity at the appointed time period exceeds a second preset threshold value, judging that the water leakage problem exists at the tail end of the water meter; the water meter is a water pump corresponding to the method, the water supply system comprises a main water pipe and a plurality of water diversion pipes connected in parallel on the main water pipe, the main water pipe is provided with a plurality of main water meters, and each water diversion pipe is provided with a water diversion meter. The invention can eliminate the interference of various normal water to water leakage detection, realizes accurate water leakage detection, and has the advantages of high detection accuracy and convenient implementation.
Description
Technical Field
The invention relates to a water leakage detection method for a water meter, the water meter, a water supply system and an application method.
Background
According to public information display of the living building department, in 2019, the average leakage rate of urban tap water pipe networks in China is about 13.2%, the urban water supply leakage amount is 83.54 hundred million cubic meters, and the waste is huge. The high leakage rate is caused by aging of the pipeline or damage to the pipeline due to geological settlement. In order to reduce the leakage rate, a plurality of methods are adopted to detect the leakage of the pipeline, and the existing leakage detection method is to wait for the repair staff to excavate and repair when the leakage causes great consequences; or the leak detector monitors along the ground above the water pipe by using a sound receiver when the leak detector is at night and the person is quiet, the method has low efficiency and can not monitor the leak systematically in a large area. In recent years, an infrasonic wave sensor is installed on the outer wall of a pipe network to monitor leakage, but the frequency of infrasonic wave signals generated by leakage is similar to that of noise such as road traffic in the environment, and normal signals are easy to interfere.
Disclosure of Invention
The invention aims to solve the technical problems: aiming at the problems in the prior art, the invention provides a water leakage detection method for a water meter, the water meter, a water supply system and an application method, which can eliminate the interference of various normal water to water leakage detection, realize accurate water leakage detection and have the advantages of high detection accuracy and convenient implementation.
In order to solve the technical problems, the invention adopts the following technical scheme:
a water leakage detection method for a water meter, comprising:
1) Acquiring a flow velocity-time curve of the water meter;
2) Searching a rising edge and a falling edge of the flow velocity in the flow velocity-time curve, and removing a flow velocity signal between the starting moment of the rising edge and the ending moment of the falling edge of the flow velocity to obtain a filtered flow velocity-time curve;
3) And aiming at the filtered flow velocity-time curve, if the flow velocity instantaneous value at the appointed moment exceeds a first preset threshold value or the flow velocity average value at the appointed time period exceeds a second preset threshold value, judging that the water leakage problem exists at the tail end of the water meter.
Optionally, in step 2), when the rising edge and the falling edge of the flow rate are found in the flow rate-time curve, the rising edge and the falling edge refer to that by performing piecewise straight line fitting on the flow rate-time curve, if the slope range of a certain straight line segment obtained by fitting falls between (0,90 ° ], the straight line segment is determined to be the rising edge; and if the slope range of a certain straight line segment obtained by fitting falls between [ -90 degrees, 0), judging the straight line segment as a falling edge.
Optionally, in step 2), when the rising edge and the falling edge of the flow rate are found in the flow rate-time curve, if a plurality of continuous rising edges are found, the plurality of continuous rising edges are combined into one rising edge; if a plurality of continuous falling edges are found, combining the plurality of continuous falling edges into one falling edge; if the rising edge and the falling edge of the flow velocity are found firstly, the rising edge is found firstly, and the starting time is used as the rising edge; if the rising edge and the falling edge of the flow rate are found, the rising edge is found last, and the ending time is taken as the falling edge.
Optionally, step 2) further includes detecting a time difference between adjacent rising edges and falling edges, and if the time difference exceeds a third preset threshold, determining that a water leakage problem exists at the tail end of the water meter; the step 2) of eliminating the flow velocity signal between the rising edge and the falling edge of the flow velocity further comprises the step of supplementing flow velocity data at any moment between the starting moment of the rising edge and the ending moment of the falling edge by interpolation.
In addition, the invention also provides a water meter with the water leakage detection function, which comprises a microprocessor and a sensor for detecting the flow or the flow rate of the water meter, wherein the microprocessor is connected with the sensor, and the microprocessor is programmed or configured to execute the steps of the water leakage detection method for the water meter.
In addition, the invention also provides a water supply system, which comprises a main water pipe and a plurality of water diversion pipes connected in parallel on the main water pipe, wherein a plurality of main water meters are arranged on the main water pipe, each water diversion pipe is provided with a water diversion meter, the main water meters are in one-to-one correspondence with the water diversion pipes, each main water meter is arranged at the upstream of a converging point of the corresponding water diversion pipe, and part or all of the main water meters and the water diversion meters are water meters with the water leakage detection function.
Optionally, the device further comprises a control device, a secondary water supply pump and a reservoir for supplying water to the water load of the water diversion pipe are sequentially connected with part or all of the water diversion pipe in series, the control end of the secondary water supply pump is connected with the control device, and the main water meter and the water diversion meter are respectively connected with the control device through a wired cable or a wireless network.
In addition, the invention also provides an application method of the water supply system, which comprises the steps of executing water leakage detection of the water diversion pipe sink point:
s1) collecting flow of a main water meter and a sub water meter;
s2) aiming at the converging point of each water diversion pipe, firstly calculating the sum of the flow of the main water meter close to the downstream of the converging point and the flow of the water diversion meter on each converging water diversion pipe as the total flow of the downstream of the converging point, then judging whether the flow of the main water meter close to the upstream of the converging point in a specified time period is equal to the total flow of the downstream of the converging point or not, if so, judging that the water leakage problem exists between the converging point and the adjacent main water meter or the water diversion meter;
the method also comprises the steps of executing water leakage detection of pipelines between the water separating meter and the water storage tank: recording the starting time t of the secondary water supply pump at each time of automatic starting at the lowest water level 1 Stop time t of automatic stop after reaching highest water level 2 The starting time t is obtained after the secondary water supply pump is automatically stopped after the reservoir reaches the highest water level 1 Time t of stopping 2 Time period deltat between 1 Flow Q of water meter on internal corresponding water diversion pipe 1 If the flow rate Q 1 If the difference value between the water diversion meter and the preset calibration value delta Q is larger than a fourth preset threshold value, judging that the water leakage problem exists in the pipeline between the water diversion meter and the corresponding water storage pool; wherein the preset calibration value deltaq is the capacity difference between the highest water level and the lowest water level of the water reservoir.
Optionally, the method further comprises counting the flow rate of the main water meter close to the water inlet end of the main water pipe in each time period in a designated period, and controlling the working state of the main water pump for supplying water to the main water pipe in each time period in the designated period according to the flow rate so that the water pressure in the main water pipe in each time period in the designated period is positively correlated with the flow rate of the time period.
Optionally, the method further comprises the step that the control device optimally controls the secondary water supply pump in a preset infrequent water consumption period: at the beginning time t of entering a preset period of infrequent water use 3 Firstly, acquiring the stop time t of the last secondary water supply pump which is automatically stopped after the reservoir reaches the highest water level based on the historical data of the water distribution meter on the corresponding water distribution pipe 2 Time t of start 3 The average flow or the maximum flow of the water load on the intermediate water diversion pipe is recorded as the required flow Q 2 Then the reservoir reaches the maximum water storage quantity Q of the highest water level 3 Subtracting the required flow rate Q 2 Obtaining an initial water storage quantity Q of the water reservoir entering a preset infrequent water consumption period 4 If the initial water storage quantity Q 4 Less than a preset amount of infrequent water Q 5 Then according to the initial water storage quantity Q 4 Water consumption Q 5 The difference starts the secondary water supply pump to store the water in the reservoirThe water quantity is increased to the infrequent water quantity Q 5 The automatic execution control strategy of the lowest water level automatic start and the highest water level automatic stop of the secondary water supply pump is shielded, and the automatic execution control strategy of the lowest water level automatic start and the highest water level automatic stop of the secondary water supply pump is recovered at the end time of the preset infrequent water consumption time period; the infrequent water consumption Q 5 The water usage upper limit for the infrequent water usage period is set in advance.
Compared with the prior art, the invention has the following advantages:
1. the water leakage detection method comprises the steps of searching the rising edge and the falling edge of the flow velocity in the flow velocity-time curve, removing the flow velocity signal in the middle of the rising edge and the falling edge of the flow velocity to obtain a filtered flow velocity-time curve, and then carrying out water leakage detection based on the filtered flow velocity-time curve, so that the interference of various normal water on water leakage detection can be eliminated, accurate water leakage detection is realized, and the method has the advantages of high detection accuracy and convenience in implementation.
2. The invention comprises two optional judging conditions aiming at the flow velocity-time curve after filtering, and if the flow velocity instantaneous value at the appointed moment exceeds a first preset threshold value or the flow velocity average value at the appointed time period exceeds a second preset threshold value, the water leakage problem at the tail end of the water meter is judged, so that the water leakage detection aiming at the moment or the time period can be realized.
Drawings
FIG. 1 is a schematic diagram of a basic flow of a method according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a water supply system according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the water leakage detection method for a water meter according to the present embodiment includes:
1) Acquiring a flow velocity-time curve of the water meter;
2) Searching a rising edge and a falling edge of the flow velocity in the flow velocity-time curve, and removing a flow velocity signal between the starting moment of the rising edge and the ending moment of the falling edge of the flow velocity to obtain a filtered flow velocity-time curve;
3) And aiming at the filtered flow velocity-time curve, if the flow velocity instantaneous value at the appointed moment exceeds a first preset threshold value or the flow velocity average value at the appointed time period exceeds a second preset threshold value, judging that the water leakage problem exists at the tail end of the water meter.
The key means for eliminating the interference of various normal water on water leakage detection in the water meter in the water leakage detection method of the embodiment is to search the rising edge and the falling edge of the flow velocity in the flow velocity-time curve, and reject the flow velocity signal in the middle of the rising edge and the falling edge of the flow velocity to obtain a filtered flow velocity-time curve. By analyzing the flow velocity-time curve of the normal water, if a plurality of water consumption points exist, the pulse signal can have multiple amplitude values, and if a single water consumption point exists, the pulse signal can have single amplitude value, but the common characteristic is that the flow velocity-time curve of the normal water is similar to the pulse signal, and has obvious rising edges and falling edges, so that the flow velocity signals in the middle of the rising edges and the falling edges of the flow velocity are removed, and the interference of various normal water on water leakage detection can be eliminated.
In order to improve the accuracy of detecting the rising edge and the falling edge, when the rising edge and the falling edge of the flow rate are found in the flow rate-time curve in step 2) of the embodiment, the rising edge and the falling edge refer to that the flow rate-time curve is subjected to piecewise straight line fitting, and if the slope range of a certain straight line segment obtained by fitting falls between (0,90 ° ], the straight line segment is judged to be the rising edge; and if the slope range of a certain straight line segment obtained by fitting falls between [ -90 degrees, 0), judging the straight line segment as a falling edge.
In order to eliminate the problem that the two ends cannot be continuously detected due to the interruption of the flow rate adjustment during normal water use and the discontinuity of the starting time, in step 2) of the embodiment, when the rising edge and the falling edge of the flow rate are found in the flow rate-time curve, if a plurality of continuous rising edges are found, the plurality of continuous rising edges are combined into one rising edge; if a plurality of continuous falling edges are found, combining the plurality of continuous falling edges into one falling edge; if the rising edge and the falling edge of the flow velocity are found firstly, the rising edge is found firstly, and the starting time is used as the rising edge; if the rising edge and the falling edge of the flow rate are found, the rising edge is found last, and the ending time is taken as the falling edge.
In order to realize the water leakage detection under the above conditions, the step 2) of the embodiment further comprises detecting the time difference between the adjacent rising edge and the falling edge, if the time difference exceeds a third preset threshold, judging that the water leakage problem exists at the tail end of the water meter, and at the moment, further sending an early warning message to the user according to the need; the step 2) of eliminating the flow rate signals between the rising edge and the falling edge of the flow rate further comprises the step of supplementing flow rate data at any moment between the starting moment of the rising edge and the ending moment of the falling edge by interpolation, and the water leakage flow at the normal water use time can be obtained by interpolation processing, so that complete water leakage state information at all moments and time periods can be obtained.
In addition, the embodiment also provides a water meter with a water leakage detection function, which comprises a microprocessor and a sensor for detecting the flow or the flow rate of the water meter, wherein the microprocessor is connected with the sensor, and the microprocessor is programmed or configured to execute the steps of the water leakage detection method for the water meter.
As shown in fig. 2, this embodiment further provides a water supply system, including a main water pipe 1 and a plurality of water diversion pipes 2 connected in parallel on the main water pipe 1, a plurality of main water meters 11 are disposed on the main water pipe 1, a water diversion table 21 is disposed on each water diversion pipe 2, the main water meters 11 are in one-to-one correspondence with the water diversion pipes 2, and each main water meter 11 is disposed on the upstream of the junction point of the corresponding water diversion pipe 2 connected to the main water pipe 1, and part or all of the main water meters 11 and the water diversion tables 21 are the water meters with the water leakage detection function, so as to realize water leakage detection of all pipelines. Referring to fig. 2, in this embodiment, a main water pump 12 is disposed at the water inlet end of the main water pipe 1, and the main water pump 12 is a part of a water supply system. In some cases, however, the water supply is supplied from the outside without the need for the main water pump 12.
As shown in fig. 2, as an alternative implementation manner, the present embodiment further includes a control device 3, a secondary water supply pump 22 and a reservoir 23 for supplying water to the water load of the water diversion pipe 2 are sequentially connected in series to a part or all of the water diversion pipe 2, a control end of the secondary water supply pump 22 is connected to the control device 3, and the main water meter 11 and the water diversion meter 21 are respectively connected to the control device 3 through a wired cable or a wireless network. Referring to fig. 2, the left side is a water diversion pipe 2 for direct water supply, and the right side is an example of a water diversion pipe 2 for secondary water supply through a reservoir 23, which may be arranged as needed. The control end of the main water pump 12 is likewise connected to the control device 3 for central control by the control device 3.
In addition, on the basis of the water supply system, the embodiment further provides an application method of the water supply system, which comprises the steps of executing water leakage detection of the water diversion pipe sink point:
s1) collecting the flow of a main water meter 11 and a water diversion meter 21;
s2) aiming at the converging point of each water diversion pipe 2 connected into the main water pipe 1, firstly calculating the sum of the flow of the main water meter 11 adjacent to the downstream of the converging point and the flow of the water diversion meters 21 on each water diversion pipe 2 converging into the main water meter as the total flow of the downstream of the converging point, then judging whether the flow of the main water meter 11 adjacent to the upstream of the converging point in a specified time period is equal to the total flow of the downstream of the converging point or not, if so, judging that the water leakage problem exists between the converging point and the adjacent main water meter 11 or the water diversion meters 21. Taking the sink a in fig. 2 as an example, the sum of the flow a1 of the main water meter 11 downstream of the sink and the flow a2 of the water diversion table 21 on the corresponding water diversion pipe 2 is calculated first as the total flow downstream of the sink, then it is determined whether the flow a3 of the main water meter 11 upstream of the sink is equal to the total flow downstream of the sink in the specified period, if so, it is determined that there is a water leakage problem between the sink a and the adjacent main water meter 11 or water diversion table 21 (the pipeline where the flows a1 to a3 are located). By the mode, water leakage detection of the water diversion pipe sink point can be conveniently realized.
In addition, the embodiment further comprises the step of executing water leakage detection of the pipeline between the water separating meter and the water storage tank: recording the starting time t of the secondary water supply pump 22 at each automatic start at the lowest water level 1 Stop time t of automatic stop after reaching highest water level 2 The starting time t is obtained after the secondary water supply pump 22 is automatically stopped each time after the reservoir 23 reaches the maximum water level 1 Time t of stopping 2 Time period deltat between 1 Flow Q of water meter 21 on inner corresponding water diversion pipe 2 1 If the flow rate Q 1 If the difference value between the water diversion meter 21 and the preset calibration value delta Q is larger than a fourth preset threshold value, judging that the water leakage problem exists in the pipeline between the water diversion meter 21 and the corresponding water storage pool 23; wherein the preset calibration value deltaq is the difference in capacity of the reservoir 23 between the highest and lowest water levels.
In addition, the present embodiment further includes counting the flow rate of the main water meter 11 near the water inlet end of the main water pipe 1 in each time period in the specified period, and controlling the working state (such as the power level or the rotation speed) of the main water pump 12 for supplying water to the main water pipe 1 in each time period in the specified period according to the flow rate, so that the water pressure in the main water pipe 1 in each time period in the specified period is positively correlated with the flow rate in the time period, thereby realizing water supply and pipe pressure regulation according to the water usage law of the user, not only saving energy, but also prolonging the service life of the pipe network and the water supply equipment.
In addition, the control method generally adopted by the secondary water supply pump 22 is an automatic execution control strategy of automatic start of the lowest water level and automatic stop of the highest water level of the reservoir 23. However, considering that the minimum water level is actually used to ensure normal use of the water load, and there is a large capacity difference between the zero water level of the reservoir 23, the capacity difference is in the daytime meaning of ensuring normal use of the water load, but in the time of infrequent water consumption such as evening, the service life of the secondary water supply pump 22 is reduced due to frequent start-up and stop of the secondary water supply pump 22 caused by the fact that the water consumption of the user is greatly reduced, and the secondary water supply pump 22 is wasted due to large start-up and stop current, and noise is generated due to frequent start-up and stop of the secondary water supply pump 22, especially disturbing the people in the time of infrequent water consumption such as evening. In order to solve the above technical problem, the present embodiment further includes the step of optimally controlling the secondary water supply pump 22 by the control device 3 in a preset infrequent water consumption period: at the beginning time t of entering a preset period of infrequent water use 3 Firstly, the last secondary water supply pump 22 is obtained in the reservoir 2 based on the historical data of the water meter 21 on the corresponding water diversion pipe 23 stopping time t of automatic stopping after reaching the highest water level 2 Time t of start 3 The average flow or the maximum flow of the water load on the intermediate water diversion pipe 2 is recorded as the required flow Q 2 The reservoir 23 is then brought to the maximum water storage capacity Q of the highest water level 3 Subtracting the required flow rate Q 2 Obtaining an initial water storage quantity Q of the reservoir 23 entering a preset infrequent water consumption period 4 If the initial water storage quantity Q 4 Less than a preset amount of infrequent water Q 5 Then according to the initial water storage quantity Q 4 Water consumption Q 5 The difference starts the secondary water supply pump 22 to increase the water storage capacity of the reservoir 23 to the infrequent water consumption Q 5 The automatic execution control strategy of the lowest water level automatic start and the highest water level automatic stop of the secondary water supply pump 22 is shielded, and the automatic execution control strategy of the lowest water level automatic start and the highest water level automatic stop of the secondary water supply pump 22 is recovered at the end time of the preset infrequent water consumption time period; the infrequent water consumption Q 5 The water usage upper limit for the infrequent water usage period is set in advance. By the mode, the frequent start and stop of the secondary water supply pump 22 in the non-frequent water consumption time period such as the evening can be effectively reduced, the noise generated by the frequent start and stop of the secondary water supply pump 22 can be reduced, the service life of the secondary water supply pump 22 can be prolonged, and the water supply energy consumption can be reduced.
In summary, when water leakage occurs in the water supply network, the water leakage amount is overlapped with other normal water consumption in a period of time, and the normal water is always in a pulse form, so that the method of the embodiment eliminates the interference of the normal water by eliminating the flow velocity signal between the rising edge and the falling edge of the flow velocity, and finds the following rules: the occurrence of water leakage faults can be clearly judged by the presence of constant flow, and the specific water leakage quantity can be analyzed. Meanwhile, if the normal water consumption and the use time are further analyzed, the use of the user water can be known, for example: when dishes are washed and cooked, when a bath is carried out, when clothes are washed and the like, if the change rule of daily water consumption of each building is further analyzed, the method of the embodiment draws the water consumption rule of one district, one campus, one community or the whole urban area into a water consumption curve, the water supply quantity and the water supply pressure of the whole water supply pipeline network are controlled according to the curve, and different control modes are adopted for each building, each district, each campus and different pipelines of each community according to the different water consumption rule, such as starting a pressurized water pump in a time-sharing mode, adjusting the water supply quantity and the like, so that the service life of the pipeline network is shortened due to the fact that the pipeline network is kept under high pressure for a long time, and meanwhile, the service life of the water pump is shortened. Therefore, the method of the embodiment supplies water and adjusts the pressure of the pipeline according to the water usage rule of the user, which not only saves energy, but also prolongs the service life of the pipe network and the water supply equipment. Of course, water leakage is found and repaired in time, a large amount of water resources can be saved, and the method can achieve multiple purposes.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (9)
1. A water leakage detection method for a water meter, comprising:
1) Acquiring a flow velocity-time curve of the water meter;
2) Searching a rising edge and a falling edge of the flow velocity in the flow velocity-time curve, and removing a flow velocity signal between the starting moment of the rising edge and the ending moment of the falling edge of the flow velocity to obtain a filtered flow velocity-time curve; when the rising edge and the falling edge of the flow velocity are searched in the flow velocity-time curve, if a plurality of continuous rising edges are found, the plurality of continuous rising edges are combined into one rising edge; if a plurality of continuous falling edges are found, combining the plurality of continuous falling edges into one falling edge; if the rising edge and the falling edge of the flow velocity are found firstly, the rising edge is found firstly, and the starting time is used as the rising edge; if the rising edge and the falling edge of the flow velocity are found, the rising edge is found finally, and the ending moment is taken as the falling edge;
3) Aiming at the filtered flow velocity-time curve, if the flow velocity instantaneous value at the appointed moment exceeds a first preset threshold value or the flow velocity average value at the appointed time period exceeds a second preset threshold value, judging that the water leakage problem exists at the tail end of the water meter;
and step 2) also comprises the step of detecting the time difference between the adjacent rising edge and the adjacent falling edge, and judging that the water meter tail end has the water leakage problem if the time difference exceeds a third preset threshold value.
2. The water leakage detecting method for a water meter according to claim 1, wherein in the step 2), when a rising edge and a falling edge of a flow rate are found in a flow rate-time curve, the rising edge and the falling edge are obtained by performing piecewise straight line fitting on the flow rate-time curve, and if a slope range of a certain straight line segment obtained by fitting falls between (0,90 ° ], the straight line segment is determined as the rising edge; and if the slope range of a certain straight line segment obtained by fitting falls between [ -90 degrees, 0), judging the straight line segment as a falling edge.
3. The water leakage detecting method for a water meter according to claim 2, wherein after the flow rate signal in the middle of the rising edge and the falling edge of the flow rate is removed in step 2), further comprising the step of interpolating flow rate data at any time between the start time of the rising edge and the end time of the falling edge.
4. A water meter with water leakage detection function comprising a microprocessor and a sensor for detecting the flow or flow rate of the water meter, said microprocessor and sensor being interconnected, characterized in that said microprocessor is programmed or configured to perform the steps of the water leakage detection method for a water meter according to any one of claims 1 to 3.
5. The utility model provides a water supply system, its characterized in that includes main water pipe (1) and many shunt tubes (2) of parallel connection on main water pipe (1), be equipped with a plurality of main water meters (11) on main water pipe (1), be equipped with a shunt meter (21) on every shunt tube (2), main water meter (11) and shunt tube (2) one-to-one, and every main water meter (11) arrange in the junction upstream of corresponding shunt tube (2) access main water pipe (1), part or whole in main water meter (11) and the shunt meter (21) are the water gauge with water leakage detection function of claim 4.
6. The water supply system according to claim 5, further comprising a control device (3), wherein a secondary water supply pump (22) and a reservoir (23) for supplying water to the water load of the water diversion pipe (2) are sequentially connected in series to part or all of the water diversion pipe (2), the control end of the secondary water supply pump (22) is connected with the control device (3), and the main water meter (11) and the water diversion meter (21) are respectively connected with the control device (3) through a wired cable or a wireless network.
7. A method of using a water supply system as defined in claim 6, comprising the step of performing water leak detection at a water distribution pipe sink:
s1) collecting flow of a main water meter (11) and a water diversion meter (21);
s2) aiming at the converging point of each water diversion pipe (2) connected into the main water pipe (1), firstly calculating the sum of the flow of a main water meter (11) adjacent to the downstream of the converging point and the flow of a water diversion table (21) on each water diversion pipe (2) converging into the main water meter as the total flow of the downstream of the converging point, then judging whether the flow of the main water meter (11) adjacent to the upstream of the converging point in a specified time period is equal to the total flow of the downstream of the converging point, and if so, judging that the water leakage problem exists between the converging point and the adjacent main water meter (11) or the water diversion table (21);
the method also comprises the steps of executing water leakage detection of pipelines between the water separating meter and the water storage tank: recording the starting time of the secondary water supply pump (22) at each automatic start at the lowest water levelt 1 Stopping time of automatic stopping after reaching highest water levelt 2 The starting time is obtained after the secondary water supply pump (22) is automatically stopped after the reservoir (23) reaches the highest water levelt 1 At the time of stoppingt 2 Time period betweenΔt 1 Flow of water diversion meter (21) on inner corresponding water diversion pipe (2)Q 1 If the flow rate isQ 1 With a preset calibration value deltaQIf the difference value is larger than a fourth preset threshold value, judging that the water leakage problem exists in the pipeline between the water diversion meter (21) and the corresponding water storage tank (23); wherein, the preset calibration value deltaQIs the capacity difference between the highest water level and the lowest water level of the water reservoir (23).
8. The method of using the water supply system according to claim 7, further comprising counting the flow rate of the main water meter (11) near the water inlet end of the main water pipe (1) in each time period in the designated period, and controlling the operation state of the main water pump (12) for supplying water to the main water pipe (1) in each time period in the designated period according to the flow rate so that the water pressure in the main water pipe (1) in each time period in the designated period is positively correlated with the flow rate of the time period.
9. The method of using a water supply system according to claim 8, further comprising the step of the control device (3) optimizing the control of the secondary water supply pump (22) during a preset period of infrequent water use: at the beginning of a preset period of infrequent water usaget 3 Firstly, based on the historical data of the water diversion meter (21) on the corresponding water diversion pipe (2), the stop time of the last secondary water supply pump (22) for automatically stopping after the water reservoir (23) reaches the highest water level is obtainedt 2 Time of startt 3 The average flow or the maximum flow of the water load on the intermediate water diversion pipe (2) is recorded as the required flowQ 2 Then the reservoir (23) is brought to the maximum water storage capacity of the highest water levelQ 3 Subtracting the required flow rateQ 2 Obtaining an initial water storage capacity of the reservoir (23) into a predetermined infrequent water usage periodQ 4 If the initial water storage capacityQ 4 Less than a predetermined amount of infrequent waterQ 5 Then according to the initial water storage amountQ 4 Infrequently water usageQ 5 The difference starts the secondary water supply pump (22) to increase the water storage capacity of the reservoir (23) to the infrequent water consumptionQ 5 The automatic execution control strategy of the automatic start of the lowest water level and the automatic stop of the highest water level of the secondary water supply pump (22) is shielded, and the automatic execution control strategy of the automatic start of the lowest water level and the automatic stop of the highest water level of the secondary water supply pump (22) is recovered at the end time of the preset infrequent water consumption time period; the infrequent water usageQ 5 The water usage upper limit for the infrequent water usage period is set in advance.
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