CN103575928A - Reservoir leakage Doppler detecting instrument - Google Patents
Reservoir leakage Doppler detecting instrument Download PDFInfo
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- CN103575928A CN103575928A CN201310556306.0A CN201310556306A CN103575928A CN 103575928 A CN103575928 A CN 103575928A CN 201310556306 A CN201310556306 A CN 201310556306A CN 103575928 A CN103575928 A CN 103575928A
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Abstract
The invention relates to a reservoir leakage Doppler detecting instrument which comprises a three-way hydrophone array, a transceiving circuit module, a preprocessing circuit module and a master control circuit. The three-way hydrophone array is used as a probe portion, three sets of hydrophones are installed in the X direction, the Y direction and the Z direction respectively, the transceiving circuit module is used for controlling transmitting and receiving of ultrasonic signals, the preprocessing circuit module is used for time-frequency analysis of data, and all the circuit modules are controlled by the master control circuit in a programming mode. In the process of working, an instruction transmission circuit of the master control circuit transmits the ultrasonic signals, a receiving circuit receives signals transmitted by water, the signals are transmitted to the preprocessing circuit module, after the preprocessing, water flow speeds in the three directions are obtained, and positioning is carried out by an internally-arranged GPS. Changes of the ultrasonic frequency and time of ultrasonic waves in the flowing water are utilized by the instrument for measuring the leakage flow field and determining the leakage position, precise positioning can be achieved for the leakage of the small flow, the operation is easy, the detection speed is high, the precision is high, and technological supports are provided for reinforcement and leakage processing of a reservoir.
Description
Technical field
The present invention relates to a kind of Detection Techniques and instrument based on Doppler effect, specifically a kind of reservoir leakage doppler detector, is mainly used in reservoir leakage and surveys.
Background technology
Due to the demand of national product, life, river improvement, Water Energy etc., reservoir dam is constantly being built.China has become water conservancy and hydropower big country in the world at present, and the dam building up has more than 8.7 ten thousand.Although the achievement that national reservoir safety is passed the flood period is good, the whole nation still has more than 40,000 small reservoir to have the dangerous problem of disease at present.A lot of reservoirs dare not retaining, allows water resource flowing away in vain, when needs water, also wants groundwater abstraction, has formed huge waste.
The most of middle-size and small-size reservoir of China is all to be formed by masses' construction 50～seventies of last century, does not pass through strict prospective design, and construction quality level is low, and there is no the quality supervision and control in work progress.Cause the reason of seepage of dam numerous, strengthened the difficulty of dangerously weak reseroirs retrofit works, active demand can be surveyed the method and technology research of seepage position.
The leakage detection of reservoir is the problem of bringing along with the appearance of problem.Generally Some Comments On Geophysical Work person utilizes the method for some physical prospectings to survey, and such as conventional self-potential method, mise-a-la-masse method, temperature field method etc., coordinates some additive methods also can solve some problems.But a lot of leakage problems are difficult to utilize these methods to be surveyed, because the reason of seepage of dam is a lot, may be foundation seepage around dam seepage, dam, dam seepage etc., add the diversity of dam structure and antiseepage, aforesaid certain methods may be felt simply helpless; In addition, even if seepage position has been found, to process, how is the effect of processing so? therefore need to search out from source seepage position, and whether seepage treatment that can this position of continuous monitoring puts in place.Given this, research and develop a kind of accurate, quick and easy, detection instrument is extremely badly in need of cheaply, also seems particularly important.
Summary of the invention
The object of the invention is to account for dangerously weak reseroirs ratio for current seepage reservoir high, the problems such as seepage position sensing difficulty is large, cost is high, low precision, and provide a kind of based on Doppler effect principle, utilize ultrasound wave under the impact of water body flow, to understand the characteristic of time of origin and frequency change, measure reservoir water body flow velocity and three-dimensional seepage flow field, determine the Doppler search instrument of seepage position.
For achieving the above object, the technical scheme that the present invention takes is: a kind of reservoir leakage Doppler search instrument is provided, comprise three-dimensional hydrophone array, transmission circuit module, pre-process circuit module and total control circuit, described three-dimensional hydrophone array, as probe segment, forms hydrophone array by X, Y, three groups of hydrophone, group of Z-direction; Adopt mutually perpendicular six logical plastic pipes on X, Y, Z three-dimensional, respectively to connect two sections of plastic pipes, each group has two nautical receiving sets to be arranged on respectively on two sections of plastic cement tube walls in the same way, in the same way the axes intersect of the line of two nautical receiving sets and place plastic pipe; Transmission circuit module, for controlling transmitting and receiving of ultrasonic signal, is provided with transmitting-receiving control circuit, pre-amplification circuit, filtering circuit, A/D change-over circuit and frequency adjustment circuit, signal generator circuit, power amplification circuit; Pre-process circuit module, for the time frequency analysis of data, is provided with data buffering module, time and frequency analysis module, output module and built-in GPS module;
The bidirectional interface of receiving and dispatching control circuit in described transmission circuit module connects the hydrophone, group of X, Y, tri-directions of Z, the output terminal of transmission circuit module medium frequency regulating circuit connects the input end of signal generator, the output terminal of signal generator connects the input end of power amplification circuit, and the output terminal of power amplification circuit connects transmitting-receiving control circuit; Transmitting-receiving control circuit connects the input end of pre-amplification circuit, the output terminal of pre-amplification circuit connects the input end of filtering circuit, the output terminal of filtering circuit connects the input end of A/D change-over circuit, and the output terminal of A/D change-over circuit connects the input end of the data buffering module of pre-process circuit module;
The output terminal tie-time of described data buffering module and the input end of frequency analysis module, the output terminal of time and frequency analysis module is connected an input end of output module, and another input end of output module connects the output terminal of built-in GPS module; The output terminal of output module externally connects external interface, comprises and connects display and computing machine;
All circuit modules are controlled by master control circuit programming.
Two hydrophone structure of each group of three-dimensional hydrophone array of the present invention are identical, and one of them is for transmitting, and another is for receiving, and transmit and receive by the instruction of master control circuit programming and control exchange work.
Total control circuit of the present invention is by programming Control transmission circuit module, and first controlled frequency regulating circuit is set transmission frequency, by signal generator transponder pulse signal or sinusoidal signal, outputs to the transmitting nautical receiving set of program appointment after power amplification circuit amplifies; The propagation of the ultrasound wave process water body that transmitting nautical receiving set inspires is received by the nautical receiving set of program appointment, the ultrasonic signal receiving is transferred to pre-amplification circuit through transmitting-receiving control circuit, signal is transferred to filtering circuit after amplifying, after filtering useful signal is transferred to A/D change-over circuit, convert simulating signal to digital signal, and by cable transmission, arrive the data buffering module of pre-process circuit module, complete when the ultrasound data sampling of a direction, be transferred to time and frequency analysis circuit and calculate the water velocity information of this direction; According to the instruction of total control circuit, gather successively the velocity information that also computational analysis completes three directions, port transmission by output module arrives external equipment iPad or computing machine, built-in GPS module is also transferred to external equipment iPad or computing machine by the position data of mensuration by output port simultaneously, completes the data acquisition task of a point to this; The data message that all collections are passed back is carried out data base administration and is processed and explain by computing machine, and is depicted as seepage Flow Field Distribution figure, draws a circle to approve out seepage position.
The ultrasound wave centre frequency that nautical receiving set of the present invention inspires is 1MHz, and the data sampling speed of instrument is 10Msps.The nautical receiving set using in the present invention belongs to high-speed sampling, and real time data amount is larger; The data of acquisition and processing are finally to output to external equipment, and external interface standard is USB2.0.
Under the total control circuit instruction of instrument, radiating circuit excitation pulse or simple signal are to the transmitting nautical receiving set of certain direction, the receiving hydrophone of this direction receives the ultrasonic signal in water, processing through receiving circuit, be sent to pre-process circuit, the time of analytic signal and frequency change, obtain speed and the water flow field feature of these direction current.By transmitting-receiving control circuit successively cycle control, obtain the water velocity of three directions and the feature of water flow field, thereby the true flow velocity of reduction water body and seepage three-dimensional flow field distribute.Externally, under the cooperation of main frame, after the data pre-service of collection, immediately read into PC.Instrument embedded software has the functions such as T/F analysis and the drafting of seepage flow field figure.
Detection instrument measuring principle of the present invention is:
Doppler's leakage detection technology, utilizes the Doppler effect of sound wave in communication process: ripple receive frequency when wave source is shifted to recipient uprises under water, and at wave source receive frequency step-down during away from recipient.When recipient moves, wave source also can obtain same conclusion when motionless.According to the relativity of motion, when wave source is fixed on relative static place with recipient, and medium moves between wave source and recipient, and corresponding variation also occurs the frequency of ripple in communication process.During water body flow, the ultrasound wave that in three-dimensional hydrophone array, the transmitting nautical receiving set of each group sends, propagation receiving hydrophone on the same group through water body receives, when current are when launching nautical receiving set and flow to receiving hydrophone, the frequency receiving diminishes, when current flow to transmitting nautical receiving set by receiving hydrophone, the frequency receiving is to become large; By test, launch the frequency of sound wave variable quantity between nautical receiving set and receiving hydrophone, just can determine speed and the seepage situation of current, consider that water (flow) direction can not just in time be on the line of sending and receiving nautical receiving set, therefore adopt three groups of mutual vertical nautical receiving sets to form array, the water flow field of test all directions, and the synthetic real water flow field of reduction.
The research of finding speed has had much both at home and abroad, obtains through quantitative test, has following formula when emissive source and receiving hydrophone all move:
V wherein
sfor the speed of emissive source with respect to medium; v
0for the speed of receiving hydrophone with respect to medium; F represents to launch the natural frequency of wave source; U represents the velocity of propagation of ripple in stationary water.
When receiving hydrophone moves towards emissive source, v
0get positive sign; When receiving hydrophone deviates from emissive source (along wave source) motion, v
0get negative sign. as emissive source v during towards motion of an observer
sbefore get positive sign; V when transmitting deviates from motion of an observer in a steady stream
sget negative sign. from above formula, can be easy to learn, when receiving hydrophone and emissive source mutually near time, f'>f; When receiving hydrophone and emissive source mutually away from time f'<f.
According to relative motion principle, the v in formula (1)
0, v
sbe all the flow velocity with respect to water body, the flow velocity of establishing water is v
water, can release:
Wherein f represents to launch the natural frequency of wave source; U represents the velocity of propagation of ripple in stationary water; v
waterthe speed (flow to receiving hydrophone from transmitting nautical receiving set and just get, flow to transmitting nautical receiving set from receiving hydrophone and get negative) that represents water body flow.
The data of utilizing formula (2) and formula (3) to calculate are frequency and the speed of transmitting receiving hydrophone place direction, and each measuring point data is three actual water flow field parameter that durection component is synthetic.
Reservoir leakage doppler detector beneficial effect of the present invention is:
1, the present invention is the detection instrument based on Doppler effect principle, propose first to use Doppler's principle technology to survey the seepage position problems such as reservoir, this detection instrument utilizes ultrasound wave at the Doppler effect of water transmission, the situation of energy quick detection seepage position and detection seepage position current, the detection accuracy of flow velocity is high, seepage flow for low discharge also can accurately be located, and can provide reliable technical support to the reinforcement of reservoir and seepage treatment.
2, reservoir leakage doppler detector structure of the present invention, easy to operate, detection accuracy is high, speed is fast, has good popularizing application prospect.
Accompanying drawing explanation
Fig. 1 is a kind of reservoir leakage doppler detector circuit structure block diagram of the present invention.
Fig. 2 is the three-dimensional hydrophone array sonde configuration schematic diagram using in the present invention.
In above-mentioned figure: 1-X is to nautical receiving set A, and 2-X is to nautical receiving set B, and 3-Y is to nautical receiving set A, and 4-Y is to nautical receiving set B, and 5-Z is to nautical receiving set A, and 6-Z is to nautical receiving set B, and 7-X is to plastic pipe, and 8-Y is to plastic pipe, and 9-Z is to plastic pipe, and 10-six leads to plastic pipe.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1: the invention provides a kind of reservoir leakage doppler detector, its structure as shown in Figure 1, this detection instrument comprises three-dimensional hydrophone array, transmission circuit module, pre-process circuit module and total control circuit, described three-dimensional hydrophone array is as probe segment, referring to Fig. 2, described three-dimensional hydrophone array is comprised of X-direction hydrophone, group, Y-direction hydrophone, group, Z-direction hydrophone, group; Adopt mutually perpendicular six logical plastic pipes 10 on X, Y, Z three-dimensional, to connect respectively two sections of X-direction plastic pipes 7, Y-direction plastic pipe 8, Z-direction plastic pipe 9, each group has two nautical receiving sets to be arranged on respectively on two sections of plastic cement tube walls in the same way, the axes intersect of the line of unidirectional two nautical receiving sets and place plastic pipe; Transmission circuit module, for controlling transmitting and receiving of ultrasonic signal, is provided with transmitting-receiving control circuit, pre-amplification circuit, filtering circuit, A/D change-over circuit and frequency adjustment circuit, signal generator circuit, power amplification circuit; Pre-process circuit module, for the time frequency analysis of data, is provided with data buffering module, time and frequency analysis module, output module and built-in GPS module.
The bidirectional interface of receiving and dispatching control circuit in described transmission circuit module connects the nautical receiving set of X, Y, tri-directions of Z, the output terminal of transmission circuit module medium frequency regulating circuit connects the input end of signal generator, the output terminal of signal generator connects the input end of power amplification circuit, and the output terminal of power amplification circuit connects transmitting-receiving control circuit; Receiving circuit in transmitting-receiving control circuit connects the input end of pre-amplification circuit, the output terminal of pre-amplification circuit connects the input end of filtering circuit, the output terminal of filtering circuit connects the input end of A/D change-over circuit, and the output terminal of A/D change-over circuit connects the input end of the data buffering module of pre-process circuit module.
The output terminal tie-time of described data buffering module and the input end of frequency analysis module, the output terminal of time and frequency analysis module is connected an input end of output module, the output terminal of output module externally connects external interface, comprises and connects display and computing machine; The output terminal of built-in GPS module connects another input end of output module.
All circuit modules are controlled by master control circuit programming.
This detection instrument also needs the support of power supply in addition, can adopt built-in lithium battery or direct supply, or adopts alternating current to convert direct supply to.
Each group of three-dimensional hydrophone array of the present invention has two identical nautical receiving sets of structure, and one of them is for transmitting, and another is for receiving, and for two nautical receiving sets that transmit and receive, can exchange work under the instruction of master control circuit programming is controlled.Three groups of hydrophone, group in the present embodiment, each group has two nautical receiving sets to be arranged in the same way on plastic cement tube wall, X-direction nautical receiving set A1 and X-direction nautical receiving set B2 are arranged on two sections of X-direction plastic pipe 7 tube walls, Y-direction nautical receiving set A3 and Y-direction nautical receiving set B4 are arranged on two sections of Y-direction plastic pipe 8 tube walls, Z-direction nautical receiving set A5 and Z-direction nautical receiving set B6 are arranged on two sections of Z-direction plastic pipe 9 tube walls, wherein X-direction nautical receiving set A1 and X-direction nautical receiving set B2, Y-direction nautical receiving set A3 and Y-direction nautical receiving set B4, Z-direction nautical receiving set A5 and Z-direction nautical receiving set B6 pairing are used, every pair of nautical receiving set transmits and receives mutual use, namely at a measurement point, every pair of nautical receiving set will gather two secondary data.
Total control circuit is by programming Control transmission circuit module, and controlled frequency regulating circuit is set transmission frequency, by signal generator transponder pulse signal or sinusoidal signal, outputs to the transmitting nautical receiving set of program appointment after power amplifier amplifies, the propagation of the ultrasound wave process water body that transmitting nautical receiving set inspires is received by the nautical receiving set of program appointment, the ultrasonic signal receiving is transferred to pre-amplification circuit through transmitting-receiving control circuit, signal is transferred to filtering circuit after amplifying, after filtering useful signal is transferred to A/D change-over circuit, convert simulating signal to digital signal and be transferred to the buffer zone of the data buffering module of pre-process circuit module, when the ultrasound data of a direction is sampled complete, be transferred to time and frequency analysis circuit and calculate the water velocity information of this direction, according to the instruction of total control circuit, gather successively the velocity information that also computational analysis completes three directions, data after calculating are by analysis transferred to external equipment iPad or computing machine by output port, built-in GPS is also transferred to external equipment iPad or computing machine by the position data of mensuration by output port simultaneously.The data that test is obtained comprise geographic position, test duration, test point percolation flow velocity, test point signal frequency information material, these data transmission are stored in database after external equipment, through analytical calculation the drafting pattern of program, automatically identify the position of reservoir leakage.
The present invention utilizes formula (2)
and formula
calculate, the data that calculate are frequency and the speed of transmitting, receiving hydrophone place direction, and each measuring point data is three actual water flow field parameter that durection component is synthetic.
The part that the present invention does not relate to all can adopt existing techniques in realizing.
Claims (4)
1. a storehouse seepage doppler detector, comprise three-dimensional hydrophone array, transmission circuit module, pre-process circuit module and total control circuit, it is characterized in that: described three-dimensional hydrophone array, as probe segment, forms hydrophone array by X, Y, three groups of hydrophone, group of Z-direction; Adopt mutually perpendicular six logical plastic pipes on X, Y, Z three-dimensional, respectively to connect two sections of plastic pipes, each group has two nautical receiving sets to be arranged on respectively on two sections of plastic cement tube walls in the same way, in the same way the axes intersect of the line of two nautical receiving sets and place plastic pipe; Transmission circuit module, for controlling transmitting and receiving of ultrasonic signal, is provided with transmitting-receiving control circuit, pre-amplification circuit, filtering circuit, A/D change-over circuit and frequency adjustment circuit, signal generator circuit, power amplification circuit; Pre-process circuit module, for the time frequency analysis of data, is provided with data buffering module, time and frequency analysis module, output module and built-in GPS module;
The bidirectional interface of receiving and dispatching control circuit in described transmission circuit module connects the hydrophone, group of X, Y, tri-directions of Z, the output terminal of transmission circuit module medium frequency regulating circuit connects the input end of signal generator, the output terminal of signal generator connects the input end of power amplification circuit, and the output terminal of power amplification circuit connects transmitting-receiving control circuit; Transmitting-receiving control circuit connects the input end of pre-amplification circuit, the output terminal of pre-amplification circuit connects the input end of filtering circuit, the output terminal of filtering circuit connects the input end of A/D change-over circuit, and the output terminal of A/D change-over circuit connects the input end of the data buffering module of pre-process circuit module;
The output terminal tie-time of described data buffering module and the input end of frequency analysis module, the output terminal of time and frequency analysis module is connected an input end of output module, and another input end of output module connects the output terminal of built-in GPS module; The output terminal of output module externally connects external interface, comprises and connects display and computing machine;
All circuit modules are controlled by master control circuit programming.
2. reservoir leakage doppler detector according to claim 1, it is characterized in that: two hydrophone structure of each group of described three-dimensional hydrophone array are identical, one of them is for transmitting, and another is for receiving, and transmits and receives by the instruction of master control circuit programming and control exchange work.
3. reservoir leakage doppler detector according to claim 1, it is characterized in that: described total control circuit is by programming Control transmission circuit module, first controlled frequency regulating circuit is set transmission frequency, by signal generator transponder pulse signal or sinusoidal signal, after amplifying, power amplification circuit outputs to the transmitting nautical receiving set of program appointment; The propagation of the ultrasound wave process water body that transmitting nautical receiving set inspires is received by the nautical receiving set of program appointment, the ultrasonic signal receiving is transferred to pre-amplification circuit through transmitting-receiving control circuit, signal is transferred to filtering circuit after amplifying, after filtering useful signal is transferred to A/D change-over circuit, convert simulating signal to digital signal, and by cable transmission, arrive the data buffering module of pre-process circuit module, complete when the ultrasound data sampling of a direction, be transferred to time and frequency analysis circuit and calculate the water velocity information of this direction; According to the instruction of total control circuit, gather successively the velocity information that also computational analysis completes three directions, port transmission by output module arrives external equipment iPad or computing machine, built-in GPS module is also transferred to external equipment iPad or computing machine by the position data of mensuration by output port simultaneously, completes the data acquisition task of a point to this; The data message that all collections are passed back is carried out data base administration and is processed and explain by computing machine, and is depicted as seepage Flow Field Distribution figure, draws a circle to approve out seepage position.
4. according to the reservoir leakage doppler detector of claim 2, it is characterized in that: the ultrasound wave centre frequency that described nautical receiving set inspires is 1MHz, the data sampling speed of instrument is 10Msps.
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| CN104111349A (en) * | 2014-07-14 | 2014-10-22 | 陈正红 | Doppler velometer |
| CN104749655A (en) * | 2015-04-15 | 2015-07-01 | 长江勘测规划设计研究有限责任公司 | Comprehensive detection method for deep water leakage of reservoir |
| WO2016153460A1 (en) * | 2015-03-20 | 2016-09-29 | Halliburton Energy Services, Inc. | Leak detection via doppler shift differences in moving hydrophones |
| CN107144506A (en) * | 2017-06-21 | 2017-09-08 | 华南理工大学 | A kind of suspension dynamic monitoring method and device based on ring combination array |
| CN107850516A (en) * | 2015-05-20 | 2018-03-27 | 沙特阿拉伯石油公司 | Detect the sampling technique of hydrocarbon seepage |
| CN108709845A (en) * | 2018-07-16 | 2018-10-26 | 中国建筑股份有限公司 | Soil layer three-dimensional infiltration field detecting system based on acoustic-electric coupled resonance and detection method |
| CN108982316A (en) * | 2018-06-14 | 2018-12-11 | 河海大学文天学院 | One kind being based on unmanned machine testing dam back side concrete surface osmotic system and method |
| CN110836981A (en) * | 2019-11-11 | 2020-02-25 | 南京世海声学科技有限公司 | Layered water flow high-resolution radial acoustic Doppler frequency measurement method |
| CN117214398A (en) * | 2023-09-04 | 2023-12-12 | 江苏省连云港环境监测中心 | Deep underground water body pollutant detection method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104111349A (en) * | 2014-07-14 | 2014-10-22 | 陈正红 | Doppler velometer |
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| CN108709845A (en) * | 2018-07-16 | 2018-10-26 | 中国建筑股份有限公司 | Soil layer three-dimensional infiltration field detecting system based on acoustic-electric coupled resonance and detection method |
| CN110836981A (en) * | 2019-11-11 | 2020-02-25 | 南京世海声学科技有限公司 | Layered water flow high-resolution radial acoustic Doppler frequency measurement method |
| CN117214398A (en) * | 2023-09-04 | 2023-12-12 | 江苏省连云港环境监测中心 | Deep underground water body pollutant detection method and system |
| CN117214398B (en) * | 2023-09-04 | 2024-05-14 | 江苏省连云港环境监测中心 | Deep underground water body pollutant detection method and system |
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