阅读说明：本技术 一种快速定位沟渠渗漏点的装置及其控制方法 (Device for quickly positioning leakage point of ditch and control method thereof ) 是由 李帝铨 程辉 付国红 肖教育 于 2019-09-30 设计创作，主要内容包括：本发明涉及勘查地球物理领域,本发明公开了一种快速定位沟渠渗漏点的装置及其控制方法,利用水上移动载体的方式带动发射电极和接收电极在水中移动,根据沟渠横向上的电场差异,确定异常点,利用北斗或GPS定位装置获取并记录定位信息,再对异常区域做进一步的渗漏点确定,弥补现有地球物理方法不适用于沟渠,无法快速、准确、自动定位沟渠渗漏点的问题。(The invention relates to the field of exploration geophysics, and discloses a device for quickly positioning a leakage point of a ditch and a control method thereof.)

1. A device for quickly positioning a leakage point of a ditch is characterized by comprising a master controller, a mobile communication module, a signal transceiving module, a positioning module, a power supply module and an electrode module, wherein the master controller, the mobile communication module, the signal transceiving module, the positioning module and the power supply module are positioned on a mobile carrier;

the electrode module comprises p pairs of transmitting electrodes and q pairs of receiving electrodes, q is an integer not less than 3, p is an integer not less than 1, each pair of receiving electrodes are opposite to each other at equal intervals, and the interval is m₁Each pair of emission electrodes are opposite to each other at equal intervals, and the interval is m₂The transmitting electrode is positioned at the outer side of the receiving electrode, q pairs of receiving electrodes are parallel and fixed at equal intervals, p pairs of transmitting electrodes are parallel and fixed at equal intervals, the whole electrode module is symmetrical in the transverse direction and the vertical direction, a stable electric field can be formed at the receiving electrode, and the direction of the stable electric field is parallel to the channel;

the signal receiving and transmitting module comprises a signal transmitter and a signal receiver, a transmitting electrode is electrically connected with the signal transmitter, a receiving electrode is electrically connected with the signal receiver, the main controller is in wireless communication connection with the main controller through the mobile communication module, and all modules on the mobile carrier are also in communication connection through the mobile communication module.

2. The apparatus for rapidly positioning the leakage point of the trench as claimed in claim 1, further comprising a remote control module for driving and controlling the movement of the moving carrier; the moving carrier is a model ship, a raft or an inflatable cushion.

3. The device for rapidly positioning the leakage point of a trench as claimed in claim 1, wherein the emitting electrode is a pair of opposite plate electrodes, and the receiving electrode is 3 pairs of opposite dot electrodes.

4. The device for rapidly positioning the leakage point of the ditch according to claim 1, wherein the positioning module adopts a Beidou or GPS positioning device; the main controller is an industrial personal computer, a PLC, a DSP, a single chip microcomputer or an ARM and is used for receiving control instructions of the main controller, receiving monitoring data transmitted by the signal receiving and sending module in real time, carrying out algorithm judgment, receiving position information of abnormal points transmitted by the positioning module and transmitting the position information to the main controller; and the master controller is used for receiving and displaying the abnormal point detection result of the master controller and sending a control instruction to the master controller.

5. The device for rapidly positioning the leakage point of the trench as claimed in claim 1 or 3, wherein the distance m between the emitting electrodes₂Should be equal to 5 times of the width of the trench, and the distance between each pair of receiving electrodes is m₁Should be 1/10 to 1/2 times the width of the trench.

6. The device of claim 1, wherein the electrode module is held in the solution of the trench and is relatively stable with respect to the gap between the two sides of the trench.

7. The apparatus of claim 1, wherein the signal transmitter generates a single frequency or a combined frequency signal.

8. The apparatus of claim 7, wherein the single frequency or combined frequency signal has a corner frequency, and the corner frequency is a frequency when the emission current is 70% of the maximum emission current.

9. The method as claimed in any one of claims 1 to 8, wherein the method comprises:

s1, the mobile carrier drives the electrode module to drive in the channel along the direction of liquid flow in the channel or the reverse direction of the liquid flow, the signal transmitter generates a transmitting signal, the transmitting signal is transmitted outwards through p pairs of transmitting electrodes, q pairs of receiving electrodes respectively receive the signal and input the signal into the signal receiver, and the signal receiver processes the signal and then transmits the signal to the main controller in real time;

s2, the main controller judges whether the voltage signal transmitted by the q pair of receiving electrodes is within the corresponding error, if not, the positioning module transmits the position of the abnormal point, the main controller stores the position information of the abnormal point, and after the moving carrier runs the whole process, the main controller transmits the position information of all the abnormal points to the main controller;

and S3, the master controller determines abnormal areas according to the position information of all the abnormal points, and then sends control instructions to further determine leakage points.

10. The method as claimed in claim 9, wherein the step S3 of determining the leakage point further comprises: and moving the moving carrier to an abnormal area through a remote control module, and determining a leakage point through the tracer.

Technical Field

The invention relates to the field of exploration geophysics, in particular to a device for quickly positioning a leakage point of a ditch and a control method thereof.

Background

The geophysical exploration methods currently applied to leak detection can be generally classified into electrical methods, electromagnetic methods and seismic methods. Electrical methods include electrical sounding, electrical profiling, high density electrical methods, and the like. The electromagnetic method comprises a transient electromagnetic method, a ground penetrating radar and the like; the seismic method includes shallow earthquake, Rayleigh surface wave method and the like. The method is generally used for leakage detection of dam piping, an electric field is established between a water outlet point on the back water side of a leakage area and water in a reservoir area, but an artificially constructed channel is generally relatively narrow, shallow and regular, the position of an electrode is required to be continuously changed by still using the dam piping leakage detection method, the artificial operation is complex and time-consuming, a three-dimensional distribution diagram of a current field is drawn according to detection data to position the leakage point, the data acquisition quantity is large and complex, and therefore a device and a method which are suitable for the channel and can be used for quickly and automatically positioning the leakage point of the channel are needed.

Disclosure of Invention

Technical problem to be solved

Based on the above problems, the present invention provides a device for fast positioning a leakage point of a trench and a control method thereof, which has the advantages of being suitable for a trench and fast and automatically positioning a leakage point of a trench.

(II) technical scheme

Based on the technical problem, the invention provides a device for quickly positioning a leakage point of a ditch, which comprises a master controller, a mobile communication module, a signal transceiving module, a positioning module, a power supply module and an electrode module, wherein the master controller, the mobile communication module, the signal transceiving module, the positioning module and the power supply module are positioned on a mobile carrier;

the electrode module comprises p pairs of transmitting electrodes and q pairs of receiving electrodes, q is an integer not less than 3, p is an integer not less than 1, each pair of receiving electrodes are opposite to each other at equal intervals, and the interval is m₁Each pair of emission electrodes are opposite to each other at equal intervals, and the interval is m₂The transmitting electrode is positioned at the outer side of the receiving electrode, q pairs of receiving electrodes are parallel and fixed at equal intervals, p pairs of transmitting electrodes are parallel and fixed at equal intervals, the whole electrode module is symmetrical in the transverse direction and the vertical direction, a stable electric field can be formed at the receiving electrode, and the direction of the stable electric field is parallel to the channel;

the signal receiving and transmitting module comprises a signal transmitter and a signal receiver, a transmitting electrode is electrically connected with the signal transmitter, a receiving electrode is electrically connected with the signal receiver, the main controller is in wireless communication connection with the main controller through the mobile communication module, and all modules on the mobile carrier are also in communication connection through the mobile communication module.

Preferably, the device further comprises a remote control module for driving and controlling the movement of the mobile carrier; the moving carrier is a model ship, a raft or an inflatable cushion.

Preferably, the transmitting electrode is a pair of opposing plate-shaped electrodes, and the receiving electrode is 3 pairs of opposing dot-shaped electrodes.

Preferably, the positioning module adopts a Beidou or GPS positioning device; the main controller is industrial control, PLC, DSP, singlechip or ARM and is used for receiving control instructions of the main controller, receiving monitoring data transmitted by the signal transceiver module in real time, carrying out algorithm judgment, receiving position information of abnormal points transmitted by the positioning module and transmitting the position information to the main controller; and the master controller is used for receiving and displaying the abnormal point detection result of the master controller and sending a control instruction to the master controller.

Preferably, the pitch m of the emitter electrodes₂Should be equal to 5 times of the width of the trench, and the distance between each pair of receiving electrodes is m₁Should be 1/10 to 1/2 times the width of the trench.

Preferably, the electrode module is maintained in the trench solution, and is relatively stable with the gap on both sides of the trench.

Preferably, the signal transmitter generates a single frequency or combined frequency signal.

Preferably, the single or combined frequency signal has a frequency which is a corner frequency, the corner frequency being the frequency when the emission current is 70% of the maximum emission current.

A control method of a device for quickly positioning a leakage point of a ditch comprises the following steps:

s1, the mobile carrier drives the electrode module to drive in the channel along the direction of liquid flow in the channel or the reverse direction of the liquid flow, the signal transmitter generates a transmitting signal, the transmitting signal is transmitted outwards through p pairs of transmitting electrodes, q pairs of receiving electrodes respectively receive the signal and input the signal into the signal receiver, and the signal receiver processes the signal and then transmits the signal to the main controller in real time;

s2, the main controller judges whether the voltage signal transmitted by the q pair of receiving electrodes is within the corresponding error, if not, the positioning module transmits the position of the abnormal point, the main controller stores the position information of the abnormal point, and after the moving carrier runs the whole process, the main controller transmits the position information of all the abnormal points to the main controller;

and S3, the master controller determines abnormal areas according to the position information of all the abnormal points, and then sends control instructions to further determine leakage points.

Preferably, the method for further determining the leakage point in step S3 includes: and moving the moving carrier to an abnormal area through a remote control module, and determining a leakage point through the tracer.

(III) advantageous effects

The technical scheme of the invention has the following advantages:

(1) the invention adopts the mode of moving the carrier on water to drive the transmitting electrode and the receiving electrode to move in water, the movable mode is suitable for the structural characteristics of narrow and long, shallow and regular ditches, the electrode is positioned in water, the detection precision is high, the electrode moves along with the moving carrier, the position of the electrode does not need to be moved manually independently, the operation is simpler, and the time is saved;

(2) the positioning module moves along with the mobile carrier to synchronously acquire positioning information of abnormal points, so that quick and automatic positioning is realized;

(3) the leakage area is determined according to the voltage abnormity of the detection receiving electrode, so that the method is quick and accurate, and is simpler compared with a positioning method for drawing a three-dimensional distribution map;

(4) no matter how wide the width of the channel is, as long as the electrodes of the device are kept in the channel solution and the distance between the electrodes and the two sides of the channel is kept relatively stable, the device can normally operate, and therefore the device has a wide application range.

Drawings

The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:

FIG. 1 is a schematic view of a model ship of an apparatus according to an embodiment of the present invention;

FIG. 2 is a bottom view of a schematic of the structure of an apparatus according to an embodiment of the present invention;

in the figure: 1: an emitter electrode A; 2: an emitter electrode a; 3: a receiving electrode B; 4: a receiving electrode b; 5: a receiving electrode C; 6: a receiving electrode c; 7: a receiving electrode D; 8: a receiving electrode d; 9: a model ship; 10: a mobile communication module; 11: a main controller; 12: a signal transceiving module; 13: a positioning module; 14: a remote control module; 15: and a power supply module.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

A device for rapidly positioning a leakage point of a ditch is shown in figure 1 and comprises a main controller, a main controller 11, a mobile communication module 10, a signal transceiving module 12, a positioning module 13, a remote control module 14, a power supply module 15 and an electrode module fixed in water below a mobile carrier, wherein the main controller, the mobile communication module 10, the signal transceiving module 12, the positioning module 13, the remote control module 14 and the power supply module 15 are positioned on the mobile carrier; the movable carrier can float on the water surface to move, and can be a model ship, a raft or an inflatable cushion and the like, in the embodiment, the model ship 9;

the electrode module comprises p pairs of transmitting electrodes and q pairs of receiving electrodes, q is an integer not less than 3, p is an integer not less than 1, each pair of receiving electrodes are opposite to each other at equal intervals, and the interval is m₁Each pair of emission electrodes are opposite to each other at equal intervals, and the interval is m₂The transmitting electrode is positioned at the outer side of the receiving electrode, q pairs of receiving electrodes are parallel and fixed at equal intervals, p pairs of transmitting electrodes are parallel and fixed at equal intervals, and the whole electrode module is symmetrical in the transverse direction and the vertical direction; each pair of transmitting electrodes or each pair of receiving electrodes are parallel and equidistant, so that a stable electric field can be formed at the receiving electrodes, and the direction of the stable electric field is parallel to the channel; the logarithm q of the receiving electrodes is an integer not less than 3 because, when there is a special case where there are leakage points having the same influence on the electric field on both sides of the trench, if there are only 2 pairs of receiving electrodes, the electric field abnormality at the receiving electrodes cannot be reflected, if there are 3 pairs and 3 pairs of receiving electrodes, the receiving electrodes will have electric field difference due to different distances from the leakage points, and the pair of receiving electrodes will have electric field differenceThe larger the number, the more advantageous is the finding of the electric field abnormality. The transmitting electrode is a flat electrode, a point electrode, a columnar electrode or other electrodes, and the receiving electrode is a point electrode.

In this embodiment, the transmitting electrode adopts a pair of opposite flat electrodes, and the receiving electrode adopts 3 pairs of opposite dot electrodes, and since the width of the flat electrodes is wider, the flat electrodes are equivalent to a plurality of uniformly distributed dot electrodes, which is more beneficial to forming a stable electric field at the receiving electrode, and makes the structure of the whole electrode device simpler. As shown in FIG. 2, the receiving electrode B3 and the receiving electrode B4, the receiving electrode C5 and the receiving electrode C6, the receiving electrode D7 and the receiving electrode D8 are opposite to each other at equal intervals, and the interval between the receiving electrode B3 and the receiving electrode B4 is m₁3, the receiving electrodes are parallel and fixed with equal spacing, the transmitting electrode A1 and the transmitting electrode a2 are positioned outside the receiving electrodes and opposite with equal spacing, and the spacing between the transmitting electrode A1 and the transmitting electrode a2 is m₂。

The spacing of the emitter electrodes should be sufficiently far, m being the spacing between 2 emitter electrodes, in order to stabilize the electric field at the receiver electrode₂Should be equal to 5 times the trench width; in order to ensure that the electromagnetic field is not influenced by the movement of the model ship 9, the electrode module is kept in the solution of the ditch and is kept relatively stable with the gaps at the two sides of the ditch; the larger the logarithm q of the receiving electrodes is in the allowable range of the width of the ditch, the more accurate the detection is, and the pairwise relative distance m of each pair of receiving electrodes₁The width of the trench is 1/10 to 1/2 times that of the trench, so that the electric field difference can be accurately detected when the electric field is abnormal; in this embodiment, the width of the trench is 20m, the spacing between 2 emitting electrodes is 100m, and the spacing between the receiving electrode B3 and the receiving electrode B4, between the receiving electrode C5 and the receiving electrode C6, and between the receiving electrode D7 and the receiving electrode D8 are all 5 m.

The signal receiving and sending module 12 comprises a signal transmitter and a signal receiver, a transmitting electrode is electrically connected with the signal transmitter, a receiving electrode is electrically connected with the signal receiver, the mobile communication module 10 comprises wireless communication and wired communication, the main controller 11 is in wireless communication connection with the main controller through the mobile communication module 10, and is also in wireless communication or wired communication connection with the signal receiving and sending module 12, the positioning module 13 and the remote control module 14 through the mobile communication module 10.

The master controller is used for receiving and displaying the abnormal point detection result of the master controller and sending a control instruction to the master controller; the main controller 11 is an industrial personal computer, a PLC, a DSP, a single chip microcomputer or an ARM, and is used for receiving a control instruction of the main controller, receiving monitoring data transmitted by the signal transceiver module 12 in real time, performing algorithm judgment, receiving position information of an abnormal point transmitted by the positioning module 13, and transmitting the position information to the main controller; the positioning module 13 adopts a Beidou or GPS positioning device; the remote control module 14 controls the movement of the model ship 9; the power supply module 15 is a battery and supplies power to each module on the model ship 9.

The present invention also includes a method of controlling a device for rapidly positioning a trench, the method comprising:

s1, driving an electrode module to run in a channel along the direction of liquid flow in the channel or the reverse direction of the liquid flow by a model ship 9, keeping the electrode module in a channel solution and keeping relatively stable with gaps at two sides of the channel, generating a transmitting signal by a signal transmitter, transmitting the transmitting signal outwards by p pairs of transmitting electrodes, receiving the signal by q pairs of receiving electrodes respectively and inputting the signal into a signal receiver, and transmitting the processed signal to a main controller 11 in real time by a mobile communication module 10 by the signal receiver;

s2, the main controller 11 judges whether the voltage signal transmitted by the q pairs of receiving electrodes is within the corresponding error, if not, the positioning module 13 transmits the position of the abnormal point, the main controller 11 stores the position information of the abnormal point, and after the model ship 9 runs the whole journey, the position information of all the abnormal points is transmitted to the main controller through the mobile communication module 10;

s3, the master controller determines abnormal areas according to the position information of all abnormal points, then sends control instructions, enables the model ship 9 to move to the abnormal areas through the remote control module 14, and further detects through tracers, such as potassium permanganate solution and the like, to further determine leakage points.

When the water flow field is normal, a stable electric field can be formed at the receiving electrode of the model ship 9 because the distance between the transmitting electrode and the receiving electrode is far enough; when a ditch leakage point occurs, a vector field of the water velocity points to a leakage water inlet, the electric field at the receiving electrode is abnormal, the voltage signals formed by each pair of receiving electrodes are different, and the difference is not within 1 percent of an allowable error range.

However, the abnormal flow field is generally much smaller than the normal flow field, so that it is critical to quickly and accurately distinguish the abnormal flow field. The propagation distance of the signal emitted by the emitter electrode is the skin depth δ:

wherein σ is the electrical conductivity, with the unit of S/m, μ is the magnetic conductivity, with the unit of H/m, ω is the angular frequency, with the unit of rad/m, f is the signal frequency, with the unit of Hz;

from the above formula, as the signal frequency increases, the skin depth decreases, the attenuation of the electromagnetic interference signal outside the water body is accelerated, and the signal-to-noise ratio also increases.

Because the transmitting electrode is connected with the signal transmitter by a cable and an inductive reactance exists, the transmitting electrode and the signal transmitter are connected by the cable

In the formula, I is emission current, the unit is A, U is emission voltage, and the unit is V;

the equivalent resistance is represented by the unit omega, the grounding resistance is represented by the unit R, the cable inductance is represented by the unit L, and the equivalent resistance is represented by the unit H.

From the above formula, the emission current decreases with the increase of the signal frequency, and when the frequency is higher than the corner frequency, the emission current decreases sharply, so that the signal is weakened and the effect is reduced; when the emission current is 70% of the maximum emission current, the frequency is defined as the corner frequency.

By comprehensively considering the factors, the corner frequency is selected to be most suitable for the emission frequency when the device is used for detecting the leakage point of the ditch, so that the interference of electromagnetic signals outside the water body, such as power frequency signals, is reduced, and the accuracy and the stability are optimal.

In summary, the device for rapidly positioning the leakage point of the trench and the control method thereof have the following advantages:

(1) the invention adopts the mode of moving the carrier on water to drive the transmitting electrode and the receiving electrode to move in water, the movable mode is suitable for the structural characteristics of narrow and long, shallow and regular ditches, the electrode is positioned in water, the detection precision is high, the electrode moves along with the moving carrier, the position of the electrode does not need to be moved manually independently, the operation is simpler, and the time is saved;

(2) the positioning module moves along with the mobile carrier to synchronously acquire positioning information of abnormal points, so that quick and automatic positioning is realized;

(3) the leakage area is determined according to the voltage abnormity of the detection receiving electrode, the method is quick and accurate, and is simpler compared with a positioning method for drawing a three-dimensional distribution map, and the transmitting electrode adopts a flat electrode, so that the whole device is simpler and more effective;

(4) the mobile carrier can be designed into a model ship which is controlled to move by a remote control module or a model ship which automatically runs, so that the automation is further realized;

(5) according to the invention, a single-frequency or combined-frequency signal is adopted to fit the water flow field, so that the anti-interference capability of the signal is improved, the optimal selection of the signal frequency is provided, the signal-to-noise ratio is further improved, and the accuracy and the stability of the signal are improved;

(6) no matter how wide the ditch is, as long as the electrodes of the device are kept in the ditch solution and the distance between the electrodes and the two sides of the ditch is kept relatively stable, the device can normally operate, so that the device has wide application range;

(7) the device can be used for daily detection, is convenient to use and saves manpower.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.