CN106090629A - Urban Underground piping lane water supply line leak detection system and method - Google Patents
Urban Underground piping lane water supply line leak detection system and method Download PDFInfo
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- CN106090629A CN106090629A CN201610425108.4A CN201610425108A CN106090629A CN 106090629 A CN106090629 A CN 106090629A CN 201610425108 A CN201610425108 A CN 201610425108A CN 106090629 A CN106090629 A CN 106090629A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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Abstract
The present invention provides a kind of Urban Underground piping lane water supply line leak detection system, including the head end pressure detecting module and terminal pressure detection module, the sonic detection module being distributed between water supply line head end and end and the host computer that lay respectively at water supply line head end and end；Head end pressure detecting module is identical with terminal pressure detection module structure, all includes pressure transducer and the real-time data acquisition device being sequentially connected with；Sonic detection module is for detecting the sound wave of current in water supply line；The host computer decline flex point that suction wave produces in the water supply line obtained by head end pressure detecting module and terminal pressure detection module carries out the coarse positioning leaked, then the sound wave detected by sonic detection module is accurately positioned.The present invention carries out coarse positioning first with pressure transducer to leakage point, then utilizes sonic sensor to be accurately positioned, thus realizes the quickly location of Urban Underground piping lane water supply line leakage and accurately report to the police.
Description
Technical field
The invention belongs to public utility operation and area of maintenance, particularly relate to a kind of Urban Underground piping lane water supply line
Leak detection system and method.
Background technology
In recent years, Urban Underground pipe gallery construction has become as the great people's livelihood and the social safety project of State-level,
It is directly connected to the stable of economic society and development.Along with the continuous propelling of Urbanization in China, piping lane construction and maintenance panel
Face pipeline management complexity, pipeline failure is difficult to realistic problems such as accurately detecting, maintenance cost is high.Therefore, by medium pipe
Line (such as water supply, combustion gas, draining, electric power, petroleum pipeline etc.) be fused in Urban Underground pipe gallery effectively monitor and
Management.Improve the operational efficiency of urban pipe network and quality, be this area research worker and engineers and technicians faced by important
Task.
Water supply line is the important component part of Urban Underground pipe gallery, and the diagnosis of its operation troubles and minimizing fault rate are equal
It it is the common problem of Urban Underground pipe gallery.Due to factors such as the extended active duty of water supply line or breakage in installations, city supplies
The leakage problem of waterpipe happens occasionally.At present, domestic detection water supply line leakage technology mainly uses the suction wave inspection of routine
Survey method, when its ultimate principle is based on pipe leakage, the suction wave of generation is to forecast the generation of leakage accident, and according to upper
Two, downstream pressure transducer receives the time difference of pressure wave and leakage is positioned by velocity of wave.Suction wave detection method is suitable for
In long-distance transmission pipeline, there is amount of calculation little, highly sensitive, it is possible to the advantage such as inspection warning rapidly.From technical specification
From the point of view of, the positioning precision of suction wave detection method is the highest, and is easily subject to the impact of some pipeline normal operatings and produces wrong report,
The routine operations such as the such as turn on pump of upstream and downstream pumping plant, termination of pumping, tune pump.On the other hand, acoustic wave detection is when pipeline leaks
Time can produce the sound of water spray, this sound can be along pipeline to upstream and downstream fast propagation.Utilize sonic sensor detection leakage
The due in of the water spray sound that point sends, it is also possible to leak position is positioned and its positioning precision generally detects than suction wave
Method wants height；But, acoustic wave detection is due to the particularity of its mechanism of transmission on pipeline, and decay quickly, is therefore only suitable for
Short distance pipe detection uses.In short, existing water supply line leakage detection method is respectively provided with obvious short slab, therefore
Urban Underground piping lane water supply line Leak Detection precision this technical problem the highest is well solved not yet.
Summary of the invention
It is an object of the invention to provide a kind of Urban Underground piping lane water supply line leak detection system and method, to solve
Leak point positioning this technical problem inefficient of existing water supply line leakage detection method, it is achieved Urban Underground piping lane supplies water
Accurately reporting to the police and quick location of pipe leakage.
The present invention solves that the technical scheme that above-mentioned technical problem is taked is: a kind of Urban Underground piping lane water supply line is let out
Missing inspection examining system, it is characterised in that: it includes head end pressure detecting module and the end laying respectively at water supply line head end and end
End pressure detection module, the sonic detection module being distributed between water supply line head end and end and host computer；Wherein
Head end pressure detecting module is identical with terminal pressure detection module structure, all includes the pressure transducer being sequentially connected with
And real-time data acquisition device, the outfan of real-time data acquisition device is connected with described host computer；
Sonic detection module is for detecting the sound wave of current in water supply line, and is sent to host computer；
Host computer is negative pressure in the water supply line obtained by head end pressure detecting module and terminal pressure detection module
The decline flex point that ripple produces carries out the coarse positioning leaked, then the sound wave detected by sonic detection module is accurately positioned.
By said system, described sonic detection module includes sonic sensor, signal conditioning circuit, signal processing list
Unit, locating module and wireless communication module；Sonic sensor is connected by the input of signal conditioning circuit with signal processing unit
Connecing, the outfan of locating module is connected with the input of signal processing unit, and signal processing unit is connected with wireless communication module.
By said system, described sonic detection module arranges one along water supply line every 2-3km.
Utilize the detection method that above-mentioned Urban Underground piping lane water supply line leak detection system realizes, it is characterised in that: it
Comprise the following steps:
S1, in head end pressure detecting module and terminal pressure detection module detect water supply line produce suction wave, then
Leak in judging water supply line, by confirming the decline flex point of suction wave, water supply line leakage point is carried out coarse positioning；
S2, select immediate two sonic detection modules with the leakage point of coarse positioning, the leakage point upstream of note coarse positioning
Last sonic detection module serial number n, then first sonic detection module serial number n+ in coarse positioning leakage point downstream
1；Host computer sends reception acoustic signals by wireless communication module to the two sonic detection module and asks；
After S3, sonic detection module receive acoustic signals request, the acoustic signals stored is chosen first width
Value is less than the acoustic signals of warning value, and the meansigma methods of this acoustic signals correspondence moment and its subsequent time is produced as leakage
Sound wave arrive sonic detection module moment, by calculated leakage produce sound wave arrive sonic detection module moment
It is sent to host computer；
The sound wave that S4, host computer receive the leakage generation from 2 sonic detection modules by wireless transport module arrives
The moment of corresponding sonic detection module, in conjunction with acoustic wave propagation velocity and 2 sonic detection modules in the position of water supply line, to letting out
Leak source is accurately positioned.
As stated above, described S1 carries out coarse positioning according to equation below to water supply line leakage point:
Wherein, X1For the leakage point of the coarse positioning distance from the initial station of water supply line, unit is m；VPSupplying water for suction wave
Spread speed in pipeline, unit is m/s；L is the length of water supply line between first and last two station, and unit is m；T1For being arranged on head
The pressure transducer stood detects the time of the decline flex point that suction wave produces in water supply line in real time, and unit is s；T2For being arranged on
The pressure transducer of terminal detects the time of the decline flex point that suction wave produces in water supply line in real time, and unit is s.
As stated above, described S3 particularly as follows:
After sonic detection module receives acoustic signals request, suspend sonic sensor and gather acoustic signals, and will storage
Acoustic signals temporally inverted order take out one by one, and carry out denoising；
Acoustic signals after temporally inverted order inquires about denoising one by one, until finding first amplitude less than warning value
Acoustic signals, and the sound wave that the meansigma methods of this acoustic signals correspondence moment and its subsequent time produces as leakage is arrived sound wave
The moment of detection module；
The moment that the sound wave that calculated leakage produces arrives sonic detection module is sent to host computer；
Restart sonic sensor and gather acoustic signals.
As stated above, described S4 is accurately positioned according to equation below:
Wherein, Y is the leakage point that the is accurately positioned distance from water supply line head end, and unit is m；YnSound for serial number n
Ripple detection module is from the distance of water supply line head end, and unit is m；Yn+1For the sonic detection module of serial number n+1 from water supply line
The distance of initial station, unit is m；VsFor sound wave along the spread speed of water supply line tube wall, unit is m/s；T2nFor serial number n
Sonic detection module detects that the sound wave that leakage produces arrives the moment of the sonic detection module of serial number n, and unit is s；T2n+1
For the sonic detection module of serial number n+1 detect the sound wave that leakage produces arrive the sonic detection module of serial number n+1 time
Carving, unit is s.
The invention have the benefit that the present invention passes through the combination of pressure transducer and sonic sensor, first with pressure
Force transducer carries out coarse positioning to leakage point, then utilizes sonic sensor to be accurately positioned, thus realizes Urban Underground pipe
Report to the police with accurate in the quickly location of corridor water supply line leakage.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the hardware principle block diagram of sonic detection module.
Fig. 3 is the method flow diagram of one embodiment of the invention.
In figure: 1-head end pressure detecting module, 2-terminal pressure detection module, 3-water supply line, 4-sonic detection module,
5-host computer.
Detailed description of the invention
Below in conjunction with instantiation and accompanying drawing, the present invention will be further described.
The present invention provides a kind of Urban Underground piping lane water supply line leak detection system, as it is shown in figure 1, it includes position respectively
In water supply line 3 head end and end head end pressure detecting module 1 and terminal pressure detection module 2, to be distributed in water supply line 1 first
Sonic detection module 4 between end and end and host computer 5；Wherein head end pressure detecting module 1 and terminal pressure detection mould
Block 2 structure is identical, all includes pressure transducer and the real-time data acquisition device being sequentially connected with, real-time data acquisition device defeated
Go out end to be connected with described host computer 5；Sonic detection module 4 is for detecting the sound wave of current in water supply line, and is sent to
Position machine 5；Host computer 5 is negative in the water supply line 3 obtained by head end pressure detecting module 1 and terminal pressure detection module 2
The decline flex point that pressure ripple produces carries out the coarse positioning leaked, then the sound wave detected by sonic detection module 4 carries out accurately determining
Position.
Further refinement, described sonic detection module as in figure 2 it is shown, include sonic sensor, signal conditioning circuit,
Signal processing unit, locating module and wireless communication module；Sonic sensor passes through signal conditioning circuit and signal processing unit
Input connect, the outfan of locating module is connected with the input of signal processing unit, signal processing unit and channel radio
News module connects.Locating module can be GPS module or Big Dipper locating module, and wireless communication module can be wifi or GPRS
Module.
Preferably, described sonic detection module arranges one along water supply line every 2-3km.In the present embodiment, pacified
Total number of sonic detection module of dress is designated as Num, and starts to take successively along water supply line serial number 1 by it from head end, and 2 ...,
Num.Described host computer is made up of industrial computer and uninterrupted power source.Can also arrange 2 host computers, one as standby.
Specifically, electric supply installation connects sonic sensor supply port, signal condition unit supply port and signal respectively
Processing unit supply port, thinks that sonic sensor, signal condition unit and signal processing unit provide electric power support；Sound wave passes
Sensor data-out port connects the input port of signal condition unit, and the output port of signal condition unit connects signal processing
The input port of unit, the geography of GPS module and time data output port connect the data/address bus port of signal processing unit,
Alignment system offer information lock in time is provided；The output port of signal processing unit connects the input port of GPRS module,
The data transmission terminal of GPRS module sends water supply line leakage information and connects display to industrial computer, the output port of industrial computer
Device, uninterrupted power source connects industrial computer, Intelligent high-speed real time data sampling device and pressure transducer, pressure transducer outfan
Mouth connects the output port of intelligent high-speed data sampling device, and the outfan of Intelligent high-speed real time data sampling device connects industry control
The input port of machine.
Utilize the detection method that above-mentioned Urban Underground piping lane water supply line leak detection system realizes, as it is shown on figure 3, its bag
Include following steps:
S1, in head end pressure detecting module and terminal pressure detection module detect water supply line produce suction wave, then
Leak in judging water supply line, by confirming the decline flex point of suction wave, water supply line leakage point is carried out coarse positioning.
In the present embodiment, according to equation below water supply line leakage point carried out coarse positioning:
Wherein, X1For the leakage point of the coarse positioning distance from the initial station of water supply line, unit is m；VPSupplying water for suction wave
Spread speed in pipeline, unit is m/s；L is the length of water supply line between first and last two station, and unit is m；T1For being arranged on head
The pressure transducer stood detects the time of the decline flex point that suction wave produces in water supply line in real time, and unit is s；T2For being arranged on
The pressure transducer of terminal detects the time of the decline flex point that suction wave produces in water supply line in real time, and unit is s.
S2, select immediate two sonic detection modules with the leakage point of coarse positioning, the leakage point upstream of note coarse positioning
Last sonic detection module serial number n, then first sonic detection module serial number n+ in coarse positioning leakage point downstream
1；Host computer sends reception acoustic signals by wireless communication module to the two sonic detection module and asks.
After S3, sonic detection module receive acoustic signals request, the acoustic signals stored is chosen first width
Value is less than the acoustic signals (principle is: during leakage, and hydraulic pressure declines, and the sound wave of current reduces) of warning value, and by this acoustic signals
The meansigma methods of corresponding moment and its subsequent time arrives the moment of sonic detection module as the sound wave that leakage produces, and will calculate
To leakage produce sound wave arrive sonic detection module moment be sent to host computer.
S3 particularly as follows:
After sonic detection module receives acoustic signals request, suspend sonic sensor and gather acoustic signals, and will storage
Acoustic signals temporally inverted order take out one by one, and carry out denoising；
Acoustic signals after temporally inverted order inquires about denoising one by one, until finding first amplitude less than warning value
Acoustic signals, and the sound wave that the meansigma methods of this acoustic signals correspondence moment and its subsequent time produces as leakage is arrived sound wave
The moment of detection module；
The moment that the sound wave that calculated leakage produces arrives sonic detection module is sent to host computer；
Restart sonic sensor and gather acoustic signals.
The sound wave that S4, host computer receive the leakage generation from 2 sonic detection modules by wireless transport module arrives
The moment of corresponding sonic detection module, in conjunction with acoustic wave propagation velocity and 2 sonic detection modules in the position of water supply line, to letting out
Leak source is accurately positioned.
Preferably, S4 is accurately positioned according to equation below:
Wherein, Y is the leakage point that the is accurately positioned distance from water supply line head end, and unit is m；YnSound for serial number n
Ripple detection module is from the distance of water supply line head end, and unit is m；Yn+1For the sonic detection module of serial number n+1 from water supply line
The distance of initial station, unit is m；VsFor sound wave along the spread speed of water supply line tube wall, unit is m/s；T2nFor serial number n
Sonic detection module detects that the sound wave that leakage produces arrives the moment of the sonic detection module of serial number n, and unit is s；T2n+1
For the sonic detection module of serial number n+1 detect the sound wave that leakage produces arrive the sonic detection module of serial number n+1 time
Carving, unit is s.
Behind location, show in display interface, it is also possible to send alarm signal.
Novelty of the present invention proposes the new approaches of a kind of suction wave and sound wave synergic detection and carries out Urban Underground piping lane water supply
Pipeline leakage testing, the advantage having played suction wave detection method carries out the coarse positioning of leakage failure, triggers and let out after coarse positioning
Two acoustic signals detection slave computers of leak source adnexa carry out collection and the sound wave location Calculation of acoustic signals, so can play
The high accuracy advantage of acoustic location method, meanwhile, only two acoustic signals detection slave computers of leakage point adnexa are put into and are let out
In leakage location, it is greatly saved network communication data conveying capacity, improves the service life of acoustic signals detection slave computer.Summarize
From the point of view of a kind of based on GPRS Urban Underground piping lane water supply line leak detection system of providing of the present invention and method can solve the problem that
Leak point positioning this technical problem inefficient of existing water supply line leakage detection method, it is achieved Urban Underground piping lane supplies water
Accurately reporting to the police and quick location of pipe leakage.
The present embodiment, GPS module is selected model to be SIRF 3III, is used brand-new sirf 3 generation chip；GPRS module is selected
It is MC55/55i by Siemens Company's model；Sonic sensor type selecting is that the LC01 built-in piezoelectric acceleration of series of Lanace company passes
Sensor；The 309 series high-precision pressure sensors that pressure transducer selects model to be OMEGA company of the U.S.；Signal processing unit
Select the dsp chip of the TMS320F28335 model of TI company；Real-time data acquisition device uses PCI e high-speed data acquisition card
M4i.44xx。
In the present embodiment, choose one section of a length of 10km of underground pipe gallery water supply line, at the host computer 5.5km of distance initial station
Simulated leakage position is set.Installing a sonic detection module along pipeline every 2km, 6 sound waves installed altogether by pipeline so completely
Detection module, and at pipeline head and end, pressure detecting module and host computer are installed simultaneously.
The progress of work being somebody's turn to do Urban Underground piping lane water supply line leak detection system based on GPRS is: pressure transducer week
Phase property gathers pressure signal and is stored in data base, and sonic sensor periodically gathers acoustic signals and by signal condition list simultaneously
Send into signal processing unit after unit's filter amplifying processing, be then stored in RAM by after analog/digital conversion and enclose its time tag.
When water supply line occur leakage time, the loss of partial fluid material can be caused, cause local density reduce and form suction wave also
Propagate along upstream and downstream, detect now by the pressure transducer being arranged on water supply line head and end and produce when suction wave produces
Time difference and the suction wave transmission velocity of wave in water supply line of raw pressure decline flex point just can substantially determine that leakage is sent out
Raw position, has the most also determined which two sonic detection module leakage point is between.Now, host computer is to the most true
Two fixed sonic detection module transmitting and receiving data requests, and wait that it is responded；After sonic detection module receives instruction, start
Signal processing unit also stops the data acquisition of sonic sensor simultaneously, then the most inverse from the RAM of signal processing unit
Sequence take out one by one sonic data and do Wavelet Denoising Method process, then will process after sonic data amplitude with according to process system
The alarming value determined compares, and finds the amplitude first sampled point less than alarming value, and the moment that this point is corresponding is i.e. sound wave sensing
Device receives the sound due in produced due to water supply line leakage.It is emphasized that the signal of this event-triggered
Processing mode, it is possible to determine rapidly the sound due in produced due to water supply line leakage, it is to avoid conventional periodic is sent out
Send the drawback that the volume of transmitted data of sonic detection data communication mechanism is big, significantly improve the efficiency of communication.It follows that this is adopted
Moment and amplitude information that sampling point is corresponding pass to wireless communication module and to upper according to the transformat of regulation with bus mode
Machine sends.Wireless communication mode uses GPRS communication modes based on ICP/IP protocol, and stamps in the packet sent
Time tag and device label.Host computer is after receiving the packet that sonic detection module is sent, when being become by protocol conversion
Between and amplitude data be stored in the internal memory of industrial computer, accurately calculate the position of leakage point and at display circle according to location algorithm
On face show, and be again started up wireless communication module by location information with note form to the mobile phone of pipeline management department head
Upper transmission, the related data write into Databasce finally related to by gained warning message backs up.
Each functional module specifically act on and to realize process as follows:
Extraneous various acoustic signals collected by sonic sensor, it is desirable to sensitivity and the sample rate of sensor are sufficiently high, simultaneously
Power consumption is the lowest, is installed on water supply line the sound that online collection leakage point sends, and acoustical signal is converted into
The signal of telecommunication.The model used in system is the vibrating sensor of LanceLC0108 series, coordinates LanceLC0108 constant-current source to make
With.
GPS module provides information lock in time accurately for each component units of system, and in the present embodiment, selection model is
SIRF 3III, uses brand-new sirf 3 generation chip.
Signal condition unit is responsible for the signal of telecommunication of sonic sensor output to be filtered amplifying, according to the work shape of time
Condition and analytical data can be inferred that the sound frequency range and signal to noise ratio that when water supply line leaks, fluid friction tube wall sends.By setting
Surely filtering frequency range and amplification can be effectively improved signal to noise ratio, filter major part noise signal.
Signal processing unit selects the dsp chip of the TMS320F28335 model of TI company, is exported by signal condition unit
The A/D converter that carries on dsp chip of analog signals be converted into digital signal, digital signal is stamped time tag
After be stored in RAM.When radio communication unit receives the control signal that host computer is sent, it is right that dsp chip utilizes interrupt instruction to start
The process of data.From RAM, take out sonic data according to time inverted order one by one first do denoising, then the signal width after processing
Value compares with the alarming value set by working condition in advance, it is thus achieved that first amplitude is less than the data of alarming value, and by data
Point for temporal information and amplitude information save, this completes the process of whole signal processing.
GPRS module selects Siemens Company's model to be MC55/55i.Compared with other communication modes, GPRS technology has
Access scope is wide, and transfer rate is high, the constant technical advantage such as online.Meanwhile, in order to prevent transmission delay, data packetloss and many
Individual device sends the special circumstances of data obfuscation simultaneously to control station, and wireless communication mode is based on ICP/IP protocol, and requires to pass
Defeated data should be according to the transformat packing transmission of regulation, to guarantee that the data that host computer receives are unique marks one point
Stand the situation of signal supervisory instrument.
Native system by be positioned at head and end pressure detecting module, along water supply line arrange several sonic detection modules
Constitute with host computer.Host computer to be circulated detection every 24 hours to each sonic detection module, and detection content includes: sentence
The disconnected communication condition with host computer, if disconnecting or smooth, re-establishes connection；Judge each sonic detection module
Time whether consistent, by GPS module, system various piece is carried out time calibration at set intervals.It addition, sonic detection
Module itself also has self-checking function, and GPRS module should be at holding state when not occurring data to send, to save electric energy.Only
When sonic detection module receives the control signal that host computer is sent, GPRS module just can start data transmission terminal and send data
Bag；The GPRS module detecting device after host computer completes data receiver can become again holding state.
Water supply line leakage detection method based on suction wave and sound wave cooperation detection, it is achieved that under two kinds of testing mechanisms
Chain warning function, the most only suction wave detection and sonic detection all think that leakage just can provide warning message, from root when occurring
Decrease the possibility of system wrong report in basis, reduce rate of false alarm.What is more important, takes full advantage of each of two kinds of detection methods
From advantage, the water supply line for whole distance utilizes suction wave detection method to detect approximate location when there is leakage,
And utilize this information to start two acoustic detectors occurred near leak, then utilize sound wave detecting method to leakage point
It is accurately positioned.
The present embodiment chooses a concrete case, comprises the following steps:
Step 1) when water supply line occurs leakage, the pressure transducer of pipeline head and end all can detect that pressure declines
Signal, calculates its time difference, and the spread speed that suction wave is in water is 1066m/s, and the employing rate of pressure signal is 50Hz, inspection
The time difference measured is 1400ms, can calculate, according to suction wave detection algorithm, the position that leakage substantially occurs by data above
It is set at distance water supply line head end 5740m, occurs between the 3rd and the 4th sonic detection module so that it is determined that go out leakage.
Step 2) by being arranged on the host computer of water supply line end by GPRS module to the 3rd of leakage point both sides the and the
4 sonic detection modules send and receive acoustic signals request, and await a response.
Step 3) after sonic detection module receives acoustic signals request, signal processing unit starts to process data, will analyze
After information according to agreement form packing after by GPRS module to described host computer transmission process after data.
Step 4) host computer is deposited into after receiving the data that sonic detection module sends in industrial computer internal memory, meter
Calculating its time difference is 188ms, and the sample rate of sonic detection module is 10000Hz, and the vibration that sound wave produces is along water supply line wall
Spread speed is 5320m/s；The most sonic detection algorithm has calculated the position of leakage point is distance water supply line head end
At 5501m, result of calculation is shown in host computer display interface.
By the result of the present embodiment it can be seen that the pipe leakage positioning precision that finally gives of the method for the invention
Deviation brings up to final 0.05% by being calculated the 12% of method by suction wave, say, that will leak out point location from 240 meters accurately
To in the range of 1m, this can make maintainer be quickly found out leakage point when leakage accident occurs in practice, loss is dropped
To minimum, it is achieved that improve water supply line leakage accurate forecast and pinpoint target.
Above example is merely to illustrate design philosophy and the feature of the present invention, its object is to make the technology in this area
Personnel will appreciate that present disclosure and implement according to this, and protection scope of the present invention is not limited to above-described embodiment.So, all depend on
The equivalent variations made according to disclosed principle, mentality of designing or modification, all within protection scope of the present invention.
Claims (7)
1. a Urban Underground piping lane water supply line leak detection system, it is characterised in that: it includes laying respectively at water supply line
The head end pressure detecting module of head end and end and terminal pressure detection module, it is distributed between water supply line head end and end
Sonic detection module and host computer；Wherein
Head end pressure detecting module is identical with terminal pressure detection module structure, all includes pressure transducer and the reality being sequentially connected with
Time data acquisition unit, the outfan of real-time data acquisition device is connected with described host computer；
Sonic detection module is for detecting the sound wave of current in water supply line, and is sent to host computer；
Host computer suction wave in the water supply line obtained by head end pressure detecting module and terminal pressure detection module is produced
Raw decline flex point carries out the coarse positioning leaked, then the sound wave detected by sonic detection module is accurately positioned.
Urban Underground piping lane water supply line leak detection system the most according to claim 1, it is characterised in that: described sound
Ripple detection module includes sonic sensor, signal conditioning circuit, signal processing unit, locating module and wireless communication module；Sound
Wave sensor is connected with the input of signal processing unit by signal conditioning circuit, the outfan of locating module and signal processing
The input of unit connects, and signal processing unit is connected with wireless communication module.
Urban Underground piping lane water supply line leak detection system the most according to claim 1 and 2, it is characterised in that: described
Sonic detection module arrange one along water supply line every 2-3km.
4. utilizing the detection method that the Urban Underground piping lane water supply line leak detection system described in claim 1 realizes, it is special
Levy and be: it comprises the following steps:
S1, in head end pressure detecting module and terminal pressure detection module detect water supply line produce suction wave, then judge
Leak in water supply line, by confirming the decline flex point of suction wave, water supply line leakage point is carried out coarse positioning；
S2, selecting immediate two sonic detection modules with the leakage point of coarse positioning, the leakage point upstream of note coarse positioning is
Later sonic detection module serial number n, then first sonic detection module serial number n+1 in coarse positioning leakage point downstream；On
Position machine sends reception acoustic signals by wireless communication module to the two sonic detection module and asks；
After S3, sonic detection module receive acoustic signals request, the acoustic signals stored is chosen first amplitude little
In the acoustic signals of warning value, and the sound that the meansigma methods of this acoustic signals correspondence moment and its subsequent time is produced as leakage
Ripple arrives the moment of sonic detection module, is sent in the moment that the sound wave that calculated leakage produces arrives sonic detection module
To host computer；
The sound wave that S4, host computer receive the leakage generation from 2 sonic detection modules by wireless transport module arrives correspondence
The moment of sonic detection module, in conjunction with acoustic wave propagation velocity and 2 sonic detection modules in the position of water supply line, to leakage point
It is accurately positioned.
Detection method the most according to claim 4, it is characterised in that: water supply line is let out by described S1 according to equation below
Leak source carries out coarse positioning:
Wherein, X1For the leakage point of the coarse positioning distance from the initial station of water supply line, unit is m；VPFor suction wave at water supply line
Interior spread speed, unit is m/s；L is the length of water supply line between first and last two station, and unit is m；T1For being arranged on initial station
Pressure transducer detects the time of the decline flex point that suction wave produces in water supply line in real time, and unit is s；T2For being arranged on terminal
Pressure transducer detect the time of the decline flex point that suction wave produces in water supply line in real time, unit is s.
Detection method the most according to claim 4, it is characterised in that: described S3 particularly as follows:
After sonic detection module receives acoustic signals request, suspend sonic sensor and gather acoustic signals, and by the sound of storage
Ripple signal temporally inverted order is taken out one by one, and carries out denoising；
Acoustic signals after temporally inverted order inquires about denoising one by one, until finding first amplitude sound wave less than warning value
Signal, and the sound wave that the meansigma methods of this acoustic signals correspondence moment and its subsequent time produces as leakage is arrived sonic detection
The moment of module；
The moment that the sound wave that calculated leakage produces arrives sonic detection module is sent to host computer；
Restart sonic sensor and gather acoustic signals.
Detection method the most according to claim 4, it is characterised in that: it is accurately fixed that described S4 is carried out according to equation below
Position:
Wherein, Y is the leakage point that the is accurately positioned distance from water supply line head end, and unit is m；YnSonic detection for serial number n
Module is from the distance of water supply line head end, and unit is m；Yn+1For the sonic detection module of serial number n+1 from the initial station of water supply line
Distance, unit is m；VsFor sound wave along the spread speed of water supply line tube wall, unit is m/s；T2nSound wave for serial number n is examined
Surveying module and detect that the sound wave of leakage generation arrives the moment of the sonic detection module of serial number n, unit is s；T2n+1For sequence number
Sonic detection module for n+1 detects that the sound wave that leakage produces arrives the moment of the sonic detection module of serial number n+1, unit
For s.
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