CN101871834A - Wireless remote water leakage detection device and system - Google Patents
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Abstract
The invention discloses a wireless remote water leakage detection device and a wireless remote water leakage detection system, and relates to the field of pipeline monitoring. A wireless water pipe leakage detection device has very low power, is provided with an embedded processor with enhanced DSP function, and acquires leakage audio data at fixed intervals in a fixed time period each day; the acquired data is locally processed; and according to the continuity of the detected leakage audio signals and by combining accumulatively stored background noise level, the leakage judgment is performed, and the detection reliability is enhanced. The device is powered by batteries, has the operating time of over 3 years, and has very low average use and maintenance cost. A remote water pipe leakage monitoring system can display the operating condition of a water supply network in a visual mode in real time by adopting a GIS system of the water supply network according to the received water leakage information, and also can automatically count multiple kinds of information.
Description
Technical field:
The present invention relates to pipeline monitoring field, be specifically related to the water leakage monitoring system on a kind of water supply network.
Background technology:
Water is Source of life, and in daily production and the life process, the water mankind that get along well are all the time keeping being closely connected.China is the serious poor country of a water resource, and per capita water resource is less than 1/4th of world average level, and Regional Distribution is extremely unbalanced, and resource lack of water and water pollution lack of water are the two big problems of pendulum in face of us.Therefore, reasonably developing and effectively utilize existing limited water resource is to be related to the whether cardinal task of sustainable development of national economy.
At present, China's water supply industry ubiquity pipe network seepy question, average damage by water rate about 20%, wherein leakage loss accounts for 50% of damage by water, some places pipe network seepy question even very serious, the water supply benefit that this has just reduced water undertaking widely also causes serious waste to water resource, some in addition have influence on people's ordinary production and life.
The pipeline leakage phenomenon has become the ubiquitous serious problems of water supply industry, the long-time water supply line of not getting rid of leaks, except waste water resource causes enormous economic loss, thereby the ground that also may endanger road, bridge and building construction causes catastrophic failure.
Since the last century the eighties, domestic most of Running-water Companies all pay much attention to the pipe network seepy question, and the specialty of having set up oneself leaks and detect troop, have also disposed the checkout equipment that leaks of some specialties.Yet Running-water Company does not reach desirable effect to the control of leaking at present, and this is because the means of leaking hunting that adopt are mainly used traditional leak detection method---sonic detection at present, comprises methods such as bibcock audition, road surface audition, correlation analysis, surface drilling.This method is located relatively effectively (microcosmic aspect) for concrete leak source, and for the control of leaking (macroscopical aspect) certain limitation is arranged, and reason is:
1, the pipe network reason that forms of leaking is complicated, external force effect, long neglected and in disrepair, and pipe network is aging, and factors such as temperature variation, variation in water pressure, land subsidence, corrosion all might cause pipe network to leak.So pipe network leaks and produces is uncertain, that is to say that it is all may take place that pipe network leaks whenever and wherever possible.Will which zone this just requires, and we in time grasp rapidly in the very first time, the existence of which section pipe network is leaked? in time establishment officer and equipment carry out the leak source location to the scene.And our most of Running-water Companies rely on existing equipment to be difficult to accomplish this point, and often when finding that ground sweat or sedimentation, hydraulic pressure just go leak detection when descending these phenomenons, at this moment pipe network may leak several days even tens days.If things go on like this, water loss is just very serious, so just is unfavorable for the macro-control of leaking.
2, because the tap water work of leaking hunting is a long-term and arduous job, rely on traditional means of leaking hunting to drop into a large amount of man power and materials, and work efficiency is lower.The personnel of leaking hunting have spent a large amount of time and efforts in some watertight at all pipe network work often, do not go in the concrete leak source location work and main energy is put into, and have so just influenced the work efficiency of leaking hunting greatly.
3, present, detecting instrument equipment and the technology of leaking both at home and abroad great majority adopt the principle of sonic detection---determine by the noise that the detection piestic water produces from the leak source ejection whether pipeline leaks and the position of leak source.The propagation of noise of leaking approach is divided into three kinds: propagate, propagate, propagate along water along soil media along tube material and tube wall.Along the prematurity still of water-borne noise detection technique, prior art mainly detects the noise of propagating and propagating along soil media along tube wall.The decay of this noise like is subjected to factor affecting such as leak source size, hydraulic pressure, tubing material, pipe length, caliber, soil media and the decay intensity difference, thus the noise that produces of the leakage point that has we be difficult to differentiate by the ear by the people.The leak source that has so just may be slipped---for example (,) the nonmetallic pipe leak source, from valve leak source far away etc., if these leak sources can not in time be detected, will cause no small water loss.
4, in above various reasons, in order to control leakage loss more effectively, we should go to consider this work of detection of leaking that testing is done as a systems engineering leaking from macroscopic view (in time finding seepy question rapidly) and two aspects of microcosmic (location leak source).
Because water supply line belongs to pressure pipeline, in case leak, owing to have pressure differential inside and outside the pipeline, so water can spill from leakage point with certain speed, produce at the small opening edge simultaneously and reveal frictional noise, and noise can be propagated to both sides by pipeline. this leakage generally has stability and chronicity, and after the decay of this noise sound wave through various propagation mediums such as soil, have certain frequency range, and the signal amplitude decay is big more during distance.This acoustic characteristic that leaks is the ultimate principle place that present underground utilities leak and detect and locate, so need long-term stability, accurately obtain bibcock sonic detection data, and can be to the long term data of single-point and the convergence analysis of multiple spot data, and because sensing point often is positioned at underground, installation and removal, and read operation all is not suitable for frequently carrying out manually-operated, and wiring inconvenience, so the needs design is a kind of can be self-powered, the convenient installation, and can data be sent back the probe node equipment of data processing centre (DPC) by wireless mode, only rely on the time of the self-powered several years of just working.Yet the transmission of wireless signals distance is a pair of contradiction with the requirement of power consumption, and present checkout equipment is only supported in-plant data data transmission, so need manual inspection pipeline collection every day data, has increased maintenance cost.
Therefore be necessary to design a kind of extremely low power dissipation, support the water supply network water-transmission line leak detection equipment and the system of remote-wireless communication simultaneously, the manual inspection that full substitution is present by way of hardware and software combination.
Summary of the invention:
The purpose of this invention is to provide a kind of wireless remote water leakage detection device and system, it can realize full-automatic unmanned automatic detection; Solve the power consumption requirement of detecting devices and the contradiction between the wireless communication distance, and, carry powered battery, can carry out the aqueduct checkout equipment of the remote loopback of data with this extremely low power dissipation that designs a kind of software and hardware combining; Be fixed on above the water-transmission line with absorption or alternate manner, and work automatically for a long time continuously; On the supervisory system of Surveillance center, show the situation of leaking of whole water supply network in real time, and the information of leaking can be sent to the portable terminal that the testing staff carries with visual means.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions: it comprises water-supply-pipe leak detected wireless devices and water-supply-pipe remote water leakage supervisory system; The water-supply-pipe detected wireless devices of leaking is the encapsulation of hermetic waterproof, the mounting means of fixing and water delivery tube wall (absorption type, steel band fixed etc.), external self-adaptation length retractable aerial; And the full-automatic spy leakage equipment of self-powered formula need not external power source, uses powered battery, and equipment is by acquisition sensor, sensor signal conditioning circuit module, digital signal processing module, and testing result memory module and wireless communication module constitute; Gather the signal of propagating along tube wall that leaks in real time with predefined interval, and this signal is differentiated, will differentiate the result and send to remote monitoring center by wireless network.
The remote water leakage supervisory system generalized information system of all water supply networks that has been integrated comprises all monitoring node information and pipe network operation information, and all monitoring nodes is monitored in real time, and shows in the map mode; This system can to all monitoring nodes per diem, month, storage, statistics, the form of information of leaking in year gather and printout; Can also receive the information of leaking that all probe nodes that leak are sent in real time, and report to the police; And the warning message that is sent can send on the portable terminal (as mobile phone) that the testing staff carries by wireless network.
The present invention has following beneficial effect: the water-supply-pipe detected wireless devices of leaking is used extremely low power dissipation and is had the flush bonding processor that strengthens the DSP function, equipment is in set time every day section, leak audio data collecting with Fixed Time Interval, the local image data of handling, continuity according to detected leakage sound signal, background noise level in conjunction with the accumulative total storage is leaked differentiation, has strengthened the reliability that detects.Data transmission can realize on a large scale by wireless network transmissions, remote wireless data communications.Equipment adopts full waterproof sealing, and absorption type is installed, and simple installation uses reliable.Equipment adopts powered battery, and the working time reached more than 3 years, and average working service cost is extremely low.Water-supply-pipe remote water leakage supervisory system can adopt the generalized information system of water supply network according to the information of leaking that receives, and shows the operation conditions of water supply network in real time with visual means, and can add up various information automatically.
Description of drawings:
Fig. 1 is the structural representation that water-supply-pipe detected wireless devices of the present invention is formed;
Fig. 2 is a water-supply-pipe detected wireless devices software flow synoptic diagram of the present invention;
Fig. 3 is the structural representation of water-supply-pipe long distance control system of the present invention.
Embodiment:
Referring to Fig. 1-3, this embodiment by the following technical solutions: it comprises water-supply-pipe leak detected wireless devices and water-supply-pipe remote water leakage supervisory system; The water-supply-pipe detected wireless devices of leaking, the mounting means of fixing and water delivery tube wall (absorption type, steel band fixed etc.), external self-adaptation length retractable aerial; And the full-automatic spy leakage equipment of self-powered formula need not external power source, uses powered battery, and equipment is by acquisition sensor, sensor signal conditioning circuit module, digital signal processing module, and testing result memory module and wireless communication module constitute; Gather the signal of propagating along tube wall that leaks in real time with predefined interval, and this signal is differentiated, will differentiate the result and send to remote monitoring center by wireless network.
The remote water leakage supervisory system generalized information system of all water supply networks that has been integrated comprises all monitoring node information and pipe network operation information, and all monitoring nodes is monitored in real time, and shows in the map mode; This system can to all monitoring nodes per diem, month, storage, statistics, the form of information of leaking in year gather and printout; Can also receive the information of leaking that all probe nodes that leak are sent in real time, and report to the police; And the warning message that is sent can send on the portable terminal (as mobile phone) that the testing staff carries by wireless network.
Referring to Fig. 1, be the water-supply-pipe of the present invention structural representation that detected wireless devices forms that leaks, it is made up of signal transducer, signal amplification and bandwidth-limited circuit, flush bonding processor module, wireless communication module, telecommunication circuit power module, signal conditioning circuit energy supply control module, power module; Signal transducer amplifies with signal and bandwidth-limited circuit is connected, signal amplification and bandwidth-limited circuit are connected with the flush bonding processor module, wireless communication module is by Asynchronous Serial Interface and flush bonding processor module, finish the process of transmitting of the network by cellular carrier of result more to Surveillance center, the flush bonding processor module is connected with the telecommunication circuit energy supply control module with the signal conditioning circuit energy supply control module respectively, and the signal conditioning circuit energy supply control module is connected with wireless communication module with signal amplification and bandwidth-limited circuit respectively by battery module with the telecommunication circuit energy supply control module.
Described flush bonding processor module is selected low power processor for use, finish the sampling and the processing of electric signal, and finish the control of data storage and power switch, wherein electric power source pair of module signal conditioning circuit and radio communication circuit use respectively and have the power supply that enables to control, and Enable Pin is by the flush bonding processor module controls.
Water-supply-pipe each ingredient of detected wireless devices that leaks is placed within the water-proof sealing shell, and adopts waterproof to fill, and communication antenna is drawn by antenna pedestal and feeder line; And by strong magnetic base or other fixed form and tube wall adhesive, leakage signal propagates into the piezoelectric ceramics vibration transducer along tube wall, and sensor output signal is embedded into the formula processor and gathers by the analog to digital conversion interface through after amplification and the bandpass filtering.
Referring to Fig. 2, be water-supply-pipe detected wireless devices software flow synoptic diagram of the present invention; 16 long fixed-point arithmetics have been adopted.Calculating process be when sampled signal is carried out-the frequency conversion, obtain the spectrum signature of signal, audio frequency characteristics based on leakage point concentrates on this ultimate principle of 200-2000Hz frequency range, we search for the frequency range that occurs surpassing the ground unrest amplitude in this frequency range continuously, leak thereby judge whether to exist, and, judge the size of water leakage according to the position and the amplitude of frequency range.The specific algorithm flow process is as follows:
1 processor is in low-power consumption mode usually, in the set time of every day, generally be morning 2:00-4:00 be waken up, enter the interval sampling mode of operation after waking up, every 30 second once sampling along the audio frequency characteristics signal of pipe transmmision;
2 interval samplings each time, processor at first is waken up, and the power supply of enable signal modulate circuit carries out signals collecting with the sample frequency of 10KHz afterwards then, gathers 256 sampling points;
3 signals of gathering carry out FFT and are for conversion into spectrum signal through after the digital filtering of parameter preset, afterwards the frequency domain information that calculates are saved in nonvolatile memory, preferably, are the serial FLASH memory of SPI interface in this example; System entered into the dormant state of low-power consumption after preservation finished;
Processor enters dormant state after 4 each the collections.After 240 samplings finish, processor reads the historical information on the same day of being stored, and to being positioned at the frequency range frequency that leaks, and spectrum amplitude is judged greater than the continuity that the signal of default judgement threshold exists, when read-around ratio during greater than default judgement threshold, judgment device is in the differentiation state that leaks;
5 open the power supply of GSM/GPRS, after system connects network, connect public network by ppp protocol, connect predefined data center server by the SOCKET mode, reenter dormancy after the result is uploaded.
Software work of the present invention also comprises the self-adaptation mode of operation that ground unrest is surveyed, under this pattern, and generations of leaking of the current nothing of software default, all spectrum informations all come from interference and noise.Under this pattern, software flow is finished the step of above-mentioned 1-3; Enter step 6 afterwards:
6 after 240 samplings finish, to the same day sample history data add up on average, with data upload, and in the FLASH of equipment and before data every day carry out progressive mean, and entering when leaking the detection operations pattern with the basic amplitude thresholding of sub-value as the differentiation of leaking.
The leak data upload of detected wireless devices of water-supply-pipe adopts the GPRS mode to be connected to data center server and by ICP/IP protocol transmission data.Simultaneously, the mode that host computer can be by SMS is with the working time of digital filter parameter, spectrum amplitude judgement threshold, continuity judgement threshold and equipment every day, and parameters such as operation range are set to the detected wireless devices of leaking among the present invention.The GSM/GPRS module of the detected wireless devices of leaking is in power-off condition to reach lowest power consumption when dormancy, when work on power every day, in case be registered to the network of operator, just can receive SMS information and processing.
Referring to Fig. 3, the structural representation of water-supply-pipe long distance control system of the present invention; It is to be made of wireless signal receiver module, the information stores of leaking and discrimination module, warning and mobile terminal module, GIS and subscriber interface module.The wireless signal receiver module receives in real time the water supply network of sending from detecting devices leak information and pipe network operation information, and with this information transmission to information stores and the discrimination module of leaking.The information stores of leaking and discrimination module are stored the information that receives and according to current information and historical information, are differentiated the integrated operation situation of pipe network, and the result is differentiated in output then.What information stores and discrimination module biography was come if leak is to leak the result, and alarm module will start alert program so, warning message is passed to detection personnel and GIS and the subscriber interface module of holding the mobile alarm terminal.GIS and subscriber interface module are presented on the display device of remote monitoring center in the time of will differentiating fructufy, comprise cartographic information and Word message, and the statistics of the information of carrying out, report and printout.
Claims (4)
1. wireless remote water leakage detection device and system is characterized in that it comprises water-supply-pipe leak detected wireless devices and water-supply-pipe remote water leakage supervisory system; The water-supply-pipe detected wireless devices of leaking, the mounting means of fixing and water delivery tube wall, external self-adaptation length retractable aerial; And the full-automatic spy leakage equipment of self-powered formula need not external power source, uses powered battery, and equipment is by acquisition sensor, sensor signal conditioning circuit module, digital signal processing module, and testing result memory module and wireless communication module constitute; Gather the signal of propagating along tube wall that leaks in real time with predefined interval, and this signal is differentiated, will differentiate the result and send to remote monitoring center by wireless network; The remote water leakage supervisory system generalized information system of all water supply networks that has been integrated comprises all monitoring node information and pipe network operation information, and all monitoring nodes is monitored in real time, and shows in the map mode; This system can to all monitoring nodes per diem, month, storage, statistics, the form of information of leaking in year gather and printout; Can also receive the information of leaking that all probe nodes that leak are sent in real time, and report to the police; And the warning message that is sent can send on the portable terminal that the testing staff carries by wireless network.
2. a kind of wireless remote water leakage detection device according to claim 1 and system is characterized in that the described water-supply-pipe detected wireless devices of leaking is made up of signal transducer, signal amplification and bandwidth-limited circuit, flush bonding processor module, wireless communication module, telecommunication circuit power module, signal conditioning circuit energy supply control module, power module; Signal transducer amplifies with signal and bandwidth-limited circuit is connected, signal amplification and bandwidth-limited circuit are connected with the flush bonding processor module, wireless communication module is by Asynchronous Serial Interface and flush bonding processor module, finish the process of transmitting of the network by cellular carrier of result more to Surveillance center, the flush bonding processor module is connected with the telecommunication circuit energy supply control module with the signal conditioning circuit energy supply control module respectively, and the signal conditioning circuit energy supply control module is connected with wireless communication module with signal amplification and bandwidth-limited circuit respectively by battery module with the telecommunication circuit energy supply control module.
3. a kind of wireless remote water leakage detection device according to claim 2 and system, it is characterized in that described flush bonding processor module selects low power processor for use, finish the sampling and the processing of electric signal, and finish the control of data storage and power switch, wherein electric power source pair of module signal conditioning circuit and radio communication circuit use respectively and have the power supply that enables to control, and Enable Pin is by the flush bonding processor module controls.
4. a kind of wireless remote water leakage detection device according to claim 1 and system is characterized in that described water-supply-pipe long distance control system is to be made of wireless signal receiver module, the information stores of leaking and discrimination module, warning and mobile terminal module, GIS and subscriber interface module; The wireless signal receiver module receives in real time the water supply network of sending from detecting devices leak information and pipe network operation information, and with this information transmission to information stores and the discrimination module of leaking; The information stores of leaking and discrimination module are stored the information that receives and according to current information and historical information, are differentiated the integrated operation situation of pipe network, and the result is differentiated in output then; What information stores and discrimination module biography was come if leak is to leak the result, and alarm module will start alert program so, warning message is passed to detection personnel and GIS and the subscriber interface module of holding the mobile alarm terminal; GIS and subscriber interface module are presented on the display device of remote monitoring center in the time of will differentiating fructufy, comprise cartographic information and Word message, and the statistics of the information of carrying out, report and printout.
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