CN104111152A - System for seepage detection of anti-seepage layer - Google Patents
System for seepage detection of anti-seepage layer Download PDFInfo
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Abstract
The invention provides a system for seepage detection of an anti-seepage layer. The system includes a conductive grid and a monitoring detection device, the conductive grid is laid under the anti-seepage layer and includes a first lead group and a second lead group which are arranged according to preset rules, any lead in the first lead group and any lead in the second lead group intersect and have an intersection point, grid points in the conductive grid are formed in lead intersection positions, and two leads at each grid point are arranged in an insulated manner; and the monitoring detection device is used for providing a source signal for each loop formed by any lead in the first lead group and any lead in the second lead group, collecting effective electrical signals in each loop, and based on the electrical signals in each loop which are collected at different moments, determining whether seepage occurs in the anti-seepage layer at the intersection position of two leads in each loop and nearby. Through the detection system provided by the invention, whether seepage of the anti-seepage occurs can be effectively detected, seepage positions can be located, and a seepage pollution scope can be monitored.
Description
Technical field
The present invention relates to impervious barrier technology, relate in particular to a kind of seepage of seepage-proof layer detection system.
Background technology
Along with economic rapid growth, China's solid waste generation is and increases progressively trend, within 2010, the house refuse amount of clearing is over 1.5 hundred million tons, industrial dangerous waste generation is 1,429 ten thousand tons, hazardous waste storage capacity over the years has reached hundred million tons, and a large amount of solid waste producing is very important to the potentially danger of environment.It is the final disposal mode of solid waste that landfill is disposed.When refuse is carried out to landfill disposal, for preventing that underground water, soil etc. is caused to secondary pollution, need to lay artificial antiseepage lining at landfill yard, isolating inside and outside landfill yard, prevent that the pollutant percolate in landfill yard from entering soil and underground water, the synthetic material of artificial antiseepage lining mainly adopts high density polyethylene (HDPE).In landfill yard construction, and in operation process, very easily because of construction quality or run improperly, cause impervious barrier to occur seepage.The hundreds of families in the whole nation will be newly-built solid waste landfill disposal facility, urgently adopt seepage of seepage-proof layer on-line monitoring and detection technique to carry out supervising to its safe operation situation.Current existing seepage of seepage-proof layer detection technique, due to cost reason, cannot accomplish to apply widely.
On the other hand, large scale industry evaporation pond, storage slag field and industrial liquid storage tank, from its environmental sensitivity and performance of enterprises angle, also impervious barrier HDPE film leak detection problem urgently to be resolved hurrily.If Fujian Zijin Mining and the mining industry of Guangxi Gold river are because seepage has caused river pollution.Along with the generation of various industrial environment hazardous events, the online monitoring of leakage of strengthening its seepage control system is also extremely urgent with detection.
Summary of the invention
Object of the present invention is just to provide a kind of seepage of seepage-proof layer detection system, whether occurs seepage, and can judge the position of seepage, monitoring pollution range effectively to detect impervious barrier.
The invention provides a kind of seepage of seepage-proof layer detection system, comprising:
Conductive grid, be laid on the below of impervious barrier, described conductive grid comprises the first wire group and the second wire group of arranging by preset rules, arbitrary wire in described the first wire group all with the second wire group in arbitrary wire intersect and there is a point of crossing, each wire infall forms each net point in described conductive grid, two wire insulation settings at each net point place;
Monitor and detection device, for providing source signal to arbitrary wire of described the first wire group and each loop of the arbitrary wire composition in the second wire group respectively, and gather respectively the effective electric signal in each loop, and the electric signal in each loop gathering based on different time, determine whether the impervious barrier of the infall of two wires in each loop occurs seepage.
In above-mentioned system, the distance between each net point is identical, or in the scope of default value.
In above-mentioned system, described monitor and detection device comprises signal generating circuit, data acquisition circuit and data processing circuit, wherein:
Described signal generating circuit, for providing source signal to arbitrary wire of described the first wire group and each loop of the arbitrary wire composition in the second wire group respectively;
Described data acquisition circuit, for when described signal generating circuit provides source signal to the loop in described each loop, gathers the effective electric signal in a described loop;
Described data processing circuit, effective electric signal for the described loop that collects based on described data acquisition circuit judges whether two wire infalls in a described loop occur seepage, simultaneously, the electric signal in each loop collecting based on described data acquisition circuit, determines that each net point position that seepage is corresponding appears in impervious barrier.
In above-mentioned system, on each loop that the arbitrary wire in the arbitrary wire in described the first wire group and the second wire group forms, be respectively arranged with gate-controlled switch, by common wire's section, be connected to the two ends of signal source;
Described signal generating circuit comprises described signal source, and the on-off controller being connected with gate-controlled switch on each loop, and described signal source is connected in common wire's section;
Described on-off controller, by controlling the opening and closing of each gate-controlled switch, provides source signal to each loop respectively by described signal source.
In above-mentioned system, each gate-controlled switch is relay switch, and described on-off controller is controlled the break-make of corresponding circuit by pilot relay.
In above-mentioned system, described data acquisition circuit comprises: signal acquisition circuit and analog to digital conversion circuit, wherein:
Described signal acquisition circuit, for gathering the effective electric signal of each loop when source signal is provided;
Analog-digital conversion circuit as described, for convert the simulating signal of the electric signal of described signal acquisition circuit collection to corresponding digital signal to;
Described data processing circuit, the value of electrical signals collecting for obtaining analog-digital conversion circuit as described, determines whether the impervious barrier at the net point place on corresponding loop occurs seepage.
In above-mentioned system, also can comprise:
Data communication module, is connected with described data acquisition circuit, and the electric signal for described data acquisition circuit is gathered, transfers to described data processing circuit by communication link.
In above-mentioned system, described data processing circuit, is specially central controller.
In above-mentioned system, described central controller, also for controlling described signal generating circuit, each loop forming to the arbitrary wire in the arbitrary wire in described the first wire group and the second wire group respectively provides source signal.
The seepage of seepage-proof layer detection system that the embodiment of the present invention provides, can detect by the loop that the wire between two with a point of crossing being arranged in the conductive grid of impervious barrier below is formed, the electric signal that can detect based on each loop of different time, whether the place, point of crossing that determines the wire in each loop produces Seepage, thereby can determine whether impervious barrier seepage occurs, and the position that seepage occurs.System provided by the invention can detect the seepage of impervious barrier in real time, and it has easy to detect, is convenient to the feature realizing.
Accompanying drawing explanation
The theory structure schematic diagram of the seepage of seepage-proof layer detection system that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the structural representation of conductive grid in the embodiment of the present invention;
Fig. 3 is the structural representation of monitor and detection device in the embodiment of the present invention;
Fig. 4 is a structural representation of the concrete application of the embodiment of the present invention;
Fig. 5 is another structural representation of the concrete application of the embodiment of the present invention.
Embodiment
Situation for impervious barrier generation seepage, the invention provides the technical scheme that embodiment provides, by lay one deck conductive grid below impervious barrier, the electric signal of each loop forming by two wires based on forming each net point in conductive grid when different time conducts electricity respectively, whether the impervious barrier of determining corresponding each net point place there is seepage, and the position that produces seepage.To the realization of technical solution of the present invention be elaborated with instantiation below.
The theory structure schematic diagram of the seepage of seepage-proof layer detection system providing for the embodiment of the present invention as shown in Figure 1.As shown in Figure 1, this seepage of seepage-proof layer detection system comprises conductive grid 10, and monitor and detection device 20, wherein conductive grid 10 is laid on the below of impervious barrier to be detected, monitor and detection device 20 can be by switching on respectively to forming the loop of two wires compositions of each net point in conductive grid 10, and detect effective electric signal in different time when energising loop, determine whether the impervious barrier at respective grid points place produces seepage.Meanwhile, because the position of the relative impervious barrier of net point can pre-determine, therefore, can accurately determine that impervious barrier produces the particular location of seepage.
As shown in Figure 2, be the structural representation of conductive grid in the embodiment of the present invention.This conductive grid 10 is laid on the below of impervious barrier to be tested, and as shown in Figure 2, this conductive grid 10 comprises by having respectively a plurality of wires in the first wire group 101 of preset rules arrangement and the second wire group 102, the first wire groups 101 and the second wire group 102; Arbitrary wire in the first wire group 101 all with the second wire group 102 in arbitrary wire intersect, and only there is a point of crossing, between the wire in the first wire group 101, there will not be intersection, between wire in the second wire group, also there will not be intersection, each wire infall forms each net point in conductive grid 10, thereby can form conductive grid 10; Meanwhile, two wire insulation settings at each net point place in conductive grid 10, as shown in Figure 2, two wires at net point Q place are insulation setting at infall.In the present embodiment, for ease of explanation, during loop corresponding to the net point that the following describes, refer to and form the loop that two wires of this net point form.
As shown in Figure 2, in the present embodiment, conductive grid 10 specifically can be rectangular node structure, wherein, arbitrary wire in the first wire group 101 all with the second wire group 102 in arbitrary wire square crossing arrange, each wire in the first wire group 101 be arranged in parallel at first direction, and each wire in the second wire group 102 be arranged in parallel in the second direction vertical with first direction.Be arranged to rectangular node structure, each net point position in conductive grid 10 can easily be determined, like this, when carrying out seepage of seepage-proof layer detection, more easily determine the seepage position of impervious barrier.In practical application, conductive grid, except being rectangular node, can be also similar round, and the wire in the first wire group and the wire in the second wire group all can be circular arc setting, and the present embodiment does not limit the concrete shape of conductive grid.Therefore, in practical application, the first wire group in conductive grid and the wire in the second wire group except by parallel vertical, intersect this default regularly arranged, also can press as required arc regularly arranged, the structure of formation similar round.
In practical application, each wire in above-mentioned conductive grid can be specifically exposed conductive cords, it can be for example stainless steel wire rope, can select diameter is the wire rope of 2mm, the desirable 5m of spacing between wire rope, wire rope infall can be by the setting of insulating of spraying insulating material, and the insulated lengths of spraying can be 50cm.Be that each wire is except net point place is mutually insulated, place outside net point position is all naked state, like this, when seepage of seepage-proof layer, if have percolate through a certain net point position, two wire insulation character that grid is pointed out will change, under the electric action of percolate, two wires are become to nonisulated state by state of insulation, like this, the loop of two wire compositions will become low-resistance characteristic from high resistant characteristic, the loop of measuring like this will be different at the electric signal of high resistant characteristic and two states of low-resistance characteristic, based on this variation, can determine whether net point place occurs seepage just.
In practical application, the distance in conductive grid 10 between each net point can be identical, or within the scope of default value, like this, can be convenient to determine the relative position of each net point, and then be easy to determine the seepage position of impervious barrier.Typically, each net point in conductive grid 10 is by regularly arranged, distance between each net point, and relative position can be determined, the grid of rectangular node as shown in Figure 2, like this, by sequence detection, form the electric signal in the loop that two wires of each net point form, just can determine whether corresponding net point place seepage occurs.In practical application, can the network of suitable distance net point be set according to seepage of seepage-proof layer accuracy of detection needs, and the network of suitable shape.
In practical application, for ease of determining of the relative position of each net point in conductive grid 10, can to the wire of arranging by preset rules in each wire group, sort in order in advance, and numbering, numbering that like this can be based on each wire, determines corresponding net point, during test, also can measure based on numbering, improve and measure efficiency and measurement effect.Particularly, as shown in Figure 2, in the conductive grid 10 of rectangular node, using each wire being arranged in parallel by first direction in the first wire group 101, respectively as the wire of directions X, number consecutively is X1, X2,, Xn, using each wire being arranged in parallel by second direction in the second wire group 102 respectively as the wire of Y-direction, number consecutively Y1, Y2 ..., Ym, wherein, n and m are greater than 0 natural number; Each net point in conductive grid 10 just can utilize (Xi, Yj) to represent, wherein, 1≤i≤n, 1≤j≤m, represents the point of crossing forming between wire Yj that wire Xi that i in the first wire group 101 is capable and the j in the second wire group 102 are capable.Like this, utilizing monitor and detection device 20 to provide source signal for loop corresponding to each net point in conductive grid 10, and while carrying out loop electrical signal detection, just can detect according to number order.In the present embodiment, can, according to the queueing discipline of conductive grid, pre-determine each net point (Xi, Yj) position below impervious barrier, or relative position relation, like this, when subsequent detection judges to loop electric signal, can promptly and accurately judge the position that occurs seepage in impervious barrier.
In the present embodiment, each loop that monitor and detection device 20 can be respectively forms to the arbitrary wire in the first wire group 101 and the arbitrary wire in the second wire group 102 provides source signal, and gather respectively the electric signal in each loop, and the electric signal in each loop based on gathering, determine whether the impervious barrier of the infall of two wires in each loop occurs seepage.Two wires locating due to the point of crossing in each loop are insulation setting, if the impervious barrier generation Seepage of place, point of crossing or adjacent, will change the electrical property (resistance that is mainly loop changes) in loop corresponding to respective grid points, therefore, according to the electrical property that detects loop, just can determine whether respective grid points place Seepage occurs.
In practical application, can be by the power supply of predeterminated voltage is provided respectively for loop corresponding to each net point, and by detecting the current signal of each loop when the energising, determine whether corresponding net point place Seepage occurs.Or, in practical application, also can determine whether net point place seepage occurs by the variation of detectable voltage signals, particularly, can electric current, voltage based on detecting determine whether to occur at net point place seepage in the size under different conditions; Or, also based on size of current, determine that loop resistance changes to determine whether to occur at net point place seepage.Below will be to detect electric current in loop, and definite loop resistance variation pattern determines whether corresponding net point place produces seepage of seepage-proof layer phenomenon.
In the present embodiment, when needs detect the impervious barrier be laid on conductive grid top and whether leak, just can detect successively the electric signal in loop of two wires formation of each net point, to determine whether corresponding net point place seepage occurs.Below the testing process of the conductive grid with rectangular node shown in Fig. 2 is described:
First, can pre-determine the position of each net point in conductive grid 10.
The position of net point, the position of the relative impervious barrier of determining in the time of specifically can be according to route wires, namely in the position at impervious barrier place.Specifically can determine according to above-mentioned each wire of arranging by directions X and Y-direction, net point (Xi for example, Yj) just represent corresponding position, according to detecting, form this net point (Xi, the electric signal in the loop that two wires Yj) form, while determining the position seepage of impervious barrier that this net point (Xi, Yj) is corresponding, just can correspondence find the corresponding position of impervious barrier, so that impervious barrier is safeguarded.Be about to each net point corresponding one by one with the actual position coordinate of impervious barrier, like this, find a net point, just can determine accurately impervious barrier correspondence position.
Secondly, by monitor and detection device, at different time, to loop corresponding to each net point, provide signal source respectively, and when signal source is provided, detect respectively the electric signal in each loop.
Finally, according to the electric signal in each loop of detecting, determine whether impervious barrier position, net point place corresponding to each loop occurs seepage.
Particularly, by monitor and detection device 20, provide successively power supply to net point (X1, Y1), (X2, Y2) ..., (Xi, Yj) ..., (Xn, Ym) corresponding loop, when signal source being provided to loop corresponding to respective grid points, the electric signal on measuring circuit, is current signal here, and according to the current signal detecting and the voltage for providing to this loop, determine the resistance in loop, net point (Xi, Yj) is designated as to Rijt1 to the resistance value in deserved loop here; Simultaneously, can, after the initial laying of conductive grid, detect and record the resistance value in the corresponding loop of each net point, here by net point (Xi, Yj) initial resistivity value in deserved loop is designated as to Rijt0, initial resistivity value is the background resistance value that initial measurement obtains when impervious barrier leaks.Like this, by resistance value and the comparison of background resistance value in loop corresponding to each net point that detection is obtained, when this ratio, namely resistance change rate surpass one set threshold value time, just can judge that seepage appears in this net point place or near impervious barrier.
In practical application, the background resistance value Rijt0 of the current resistance value Rijt1 measuring of net point (Xi, Yj) and previous moment can be compared to the resistance change rate kij obtaining:
Kij=(Rijt0-Rijt1)/Rijt0*100%, wherein, i=1,2 wherein ..., n, j=1,2 ..., m.
By measuring each net point, just can obtain the resistance change rate of each net point, and then obtain a matrix K:
Like this, by checking this matrix K, when the resistance change rate wherein occurring is greater than setting threshold, just can think that seepage appears in corresponding net point place, meanwhile, can be defined as approaching most according to net point corresponding to rate of change maximal value the net point of seepage; Or, the resistance change rate corresponding to each net point that also can obtain according to periodic measurement in certain a period of time, by observing resistance change rate situation of change corresponding to net point, determine (for example whether Seepage increases the weight of seepage situation, or whether Seepage relaxes etc.), seepage is repaired timely determining whether.Particularly, during impervious barrier generation seepage in place, when percolate diffuses to a certain net point, high resistant characteristic between the loop that two wires that this net point place insulation arranges form will be changed, the loop of two wire formation will become low-resistance characteristic, the resistance change rate of this net point now obtaining by detection will be larger, and then can determine that seepage appears in this net point place impervious barrier.For example, the net point that produces leakage is (Xa, Yb), and the loop being comprised of wire Xa and wire Yb presents low-resistance feature, the resistance change rate kab measuring, this value is larger, for example, surpass setting threshold, just can determine and may occur seepage, further, can be according to the resistance change rate kij comparison with other net points (Xi, Yj), the net point of resistance change rate maximum is very likely just the most close seepage position; Meanwhile, also can judge the region roughly that Seepage occurs, and then can orient accurately the problem that seepage appears in impervious barrier; Meanwhile, also can analyze continuous a period of time, in the value that the different measuring cycle records, determine seepage degree, and the particular location of seepage.
As a rule, if when seepage occurs impervious barrier, effusion may be diffused into a plurality of net points, therefore, during impervious barrier generation seepage, the resistance change rate that adjacent continuous a plurality of net points place can be detected can surpass default threshold value.Thus, also can determine the region that produces Seepage.
In practical application, can be by predetermined period, obtain in real time the matrix K of different cycles, and then can whether occur that seepage detects to impervious barrier, simultaneously, when there is seepage in impervious barrier, also can detect in real time the diffusion zone of Seepage, the range of scatter of percolate when impervious barrier is leaked is monitored.Separately, also can determine seepage range of scatter and seepage trend by the resistance change rate in the matrix K of analysis different cycles, can accurately orient the net point that occurs leakage, and then determine the position that seepage appears in impervious barrier.
Fig. 3 is the structural representation of monitor and detection device in the embodiment of the present invention.The present embodiment, as shown in Figure 3, above-mentioned monitor and detection device 20 specifically can comprise signal generating circuit 201, data acquisition circuit 202 and data processing circuit 203, wherein:
Signal generating circuit 201, for providing source signal to arbitrary wire of the first wire group 101 and each loop of the arbitrary wire composition in the second wire group 102 respectively;
Data acquisition circuit 202, for when signal generating circuit 201 provides source signal to the loop in each loop, gathers the effective electric signal in this loop;
Data processing circuit 203, effective electric signal for this loop of collecting based on data acquisition circuit 202 judges whether two wire infalls in this loop occur seepage, simultaneously, the electric signal in each loop collecting based on data acquisition circuit, determines that each net point position that seepage is corresponding appears in impervious barrier.
In practical application, signal generating circuit 201 and data acquisition circuit 202 can be powered and data acquisition within the cycle of default settings, guarantee like this to switch on respectively and to gather electric signal each loop.During specific implementation, can, by signal generating circuit 201 when providing source signal for a loop, send a control signal and gather to data acquisition circuit 202; Or, can, by the default cycle, by signal generating circuit 201, power respectively to each loop, and data acquisition circuit 202 can carry out by the same cycle collection of electric signal; Or, can concentrate and control by outside controller, when guaranteeing the same circuit to power, can gather the electric signal on it simultaneously; Or, also can by predetermined period, give each loop power supply by signal generating circuit 201, and data acquisition circuit 202 continuous collecting, and then corresponding electric signal while determining each loop power supply by the power-up period of signal generating circuit.In practical application, can select as required suitable power supply and signals collecting mode.
In the present embodiment, after the data processing circuit 203 that will using as Centralized Controller come centralized control to illustrate as an example, in practical application, be not limited to this, as long as the electric signal in the time of can collecting accurately the energising of each loop.In the present embodiment, data acquisition circuit 202 is specially signal acquisition circuit, can be comprised of current sensor etc., and particular circuit configurations is not particularly limited, as long as can collect the current signal on loop.
Fig. 4 is a structural representation of the concrete application of the embodiment of the present invention.In the present embodiment, in conductive grid 10, on each loop that arbitrary wire in arbitrary wire in the first wire group 101 and the second wire group 102 forms, be respectively arranged with gate-controlled switch, and by common wire's section, be connected to the two ends of signal source, particularly, as shown in Figure 4, in the first wire group 101, each wire is held equal physical connection together at A, the other end is not all connected, same, each wire in the second wire group 102 is held equal physical connection together at B, the other end is not all connected yet, and side a and b connects by wire C, be that each loop that each net point is corresponding has common wire's section C, and signal generating circuit 201 comprises signal source 2011, and on-off controller 2012 and a plurality of gate-controlled switch T that controlled by on-off controller 2012, wherein, signal source 2011 is connected in common wire's section C, on the corresponding loop of each net point in conductive grid 10, be in series with respectively gate-controlled switch T, each gate-controlled switch T is all connected with on-off controller 2012, on-off controller 2012 can be by controlling opening or closing of each gate-controlled switch T, to loop corresponding to each net point in conductive grid, provide source signal respectively, be that signal source 2011 has a voltage, when the gate-controlled switch T on a loop closes under on-off controller 2012 is controlled, will provide a voltage for loop, now, the electric signal that just can gather in this loop by data acquisition circuit 202.
In the present embodiment, described gate-controlled switch T is specifically as follows relay switch, can be particularly electromagnetic relay device, and on-off controller 2012 can be by predetermined period, to the relay switch energising on each loop, to control the break-make in each loop, there is good switch and control effect respectively.The low-voltage control circuit that this on-off controller can be comprised of controllers such as single-chip microcomputers, can, according to cycle or other control signal set, control respectively the break-make of each controlled switch.In Fig. 4, do not provide the connecting line between gate-controlled switch T and on-off controller, but in practical application, each gate-controlled switch T is all connected with on-off controller.
In the present embodiment, as shown in Figure 4, described data acquisition circuit 202 specifically can comprise signal acquisition circuit 2021 and analog to digital conversion circuit 2022, wherein, signal acquisition circuit 2021 can be specifically current sensor or inductor, can detect in real time the current signal of flowing through in loop; Analog to digital conversion circuit 2022 is electrically connected to signal acquisition circuit 2021, can convert in real time the current signal of its collection to corresponding digital signal, specifically can adopt the A/D device of 16.Data processing circuit 203 just can pass the electric current of coming according to the analog to digital conversion circuit obtaining like this, determines whether the impervious barrier at the net point place on corresponding loop occurs seepage.During specific implementation, this data acquisition circuit 202 also can include single-chip microcomputer and cache memory section etc., to the signal gathering is processed and buffer memory, and then the data transmission of buffer memory to data processing circuit 203 is processed.
In the present embodiment, described data processing circuit 203 can be specifically a central controller, can to the signal gathering, be processed by it, and can control power-supply circuit 201, to provide power supply to each loop respectively, particularly, can control each gate-controlled switch T by gauge tap controller 2012, to realize, to each loop, provide respectively power supply.
As shown in Figure 5, in the present embodiment, data processing circuit 203 also can be arranged on different positions from data acquisition circuit 202, and data processing circuit can be arranged on such as control desk etc., can be at a distance to collecting to such an extent that data focus on, particularly, as shown in Figure 5, this monitor and detection device 20 also can comprise data communication module 204, is connected with data acquisition circuit 202, electric signal for data acquisition circuit is gathered, transfers to data processing circuit 202 by communication link.This data communication module 204 can be to be connected with the communication interface on data processing circuit at a distance by wired cables such as the Internet/LAN (Local Area Network), sends to data processing circuit to process the current digital signal collecting; Or, this data communication module 204 can be also wireless communication module, for example mobile communication module, transfers to Value Data treatment circuit by wireless mode by current digital signal, and now data processing circuit also should have corresponding wireless communication module to receive corresponding signal.In practical application, form, medium that to signal, transmission adopts are not particularly limited.
Like this, by data processing circuit 203 is arranged on to the positions such as control desk, make maintainer just can the data based on measuring determine whether impervious barrier occurs seepage at worktable; The described controller as data processing circuit 203 can be specifically computer equipment etc., the data that it can come automatic analyzing and testing to obtain by the data analysis software on it, and automatically generate above-mentioned matrix K, and data that can be based in matrix K, whether real-time analysis impervious barrier there is seepage, meanwhile, also can on display, show in real time; Staff further, can also be connected with warning device, when seepage being detected, can send warning message by warning device, so that can safeguard impervious barrier in time.
When also needing power-supply circuit to control as data processing circuit 203, controller can control signal be sent to power-supply circuit by wireless communication module and data acquisition circuit carries out the collection of power supply supply and electric signal.
Wherein, also can be to detecting to such an extent that historical data is stored as the controller of data processing circuit 203, and inquiry, printing reports etc.
In practical application, the impervious elements such as landfill yard, solution pool, when building, can lay multi-layer H DPE film impervious barrier lining or individual layer HDPE film impervious barrier, and conductive grid can be laid on the bottom of detected impervious barrier, and the impervious barrier on it be carried out to seepage and detect online.When detected impervious barrier does not leak, the resistance characteristic in the loop that each net point in conductive grid is corresponding just can not change.
In practical application, above-mentioned power-supply circuit specifically can provide high-voltage signal source, particularly, can be to adopt high frequency switching converter technology to convert alternating current to high voltage direct current, can utilize pulse width modulation (PWM) technology realize AC DC conversion.By high-voltage signal is provided, can improve the accuracy of testing result; Meanwhile, if provide high pressure, data acquisition circuit can be realized electricity isolation by coupled circuit so, to guarantee the safety of data acquisition circuit, avoids affected by high.
To sum up, the seepage of seepage-proof layer detection system that the embodiment of the present invention provides, can detect by the loop that the wire between two with a point of crossing being arranged in the conductive grid of impervious barrier below is formed, the electric signal that can detect based on each loop of different time, whether the place, point of crossing that determines the wire in each loop produces Seepage, thereby can determine whether impervious barrier seepage occurs, and the position that seepage occurs.System provided by the invention can detect the seepage of impervious barrier in real time, and it has easy to detect, is convenient to the feature realizing.When the check system by above-mentioned is confirmed the seepage position of impervious barrier appearance, just can repair impervious barrier, to stop further seepage, improve anti-seepage effect.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a seepage of seepage-proof layer detection system, is characterized in that, comprising:
Conductive grid, be laid on the below of impervious barrier, described conductive grid comprises the first wire group and the second wire group of arranging by preset rules, arbitrary wire in described the first wire group all with the second wire group in arbitrary wire intersect and there is a point of crossing, each wire infall forms each net point in described conductive grid, two wire insulation settings at each net point place;
Monitor and detection device, for providing source signal to arbitrary wire of described the first wire group and each loop of the arbitrary wire composition in the second wire group respectively, and gather respectively the effective electric signal in each loop, and the electric signal in each loop gathering based on different time, determine whether the impervious barrier of the infall of two wires in each loop occurs seepage.
2. system according to claim 1, is characterized in that, the distance between each net point is identical, or in the scope of default value.
3. system according to claim 1, is characterized in that, described monitor and detection device comprises signal generating circuit, data acquisition circuit and data processing circuit, wherein:
Described signal generating circuit, for providing source signal to arbitrary wire of described the first wire group and each loop of the arbitrary wire composition in the second wire group respectively;
Described data acquisition circuit, for when described signal generating circuit provides source signal to the loop in described each loop, gathers the effective electric signal in a described loop;
Described data processing circuit, effective electric signal for the described loop that collects based on described data acquisition circuit judges whether two wire infalls in a described loop occur seepage, simultaneously, the electric signal in each loop collecting based on described data acquisition circuit, determines that each net point position that seepage is corresponding appears in impervious barrier.
4. system according to claim 3, is characterized in that, on each loop that the arbitrary wire in the arbitrary wire in described the first wire group and the second wire group forms, is respectively arranged with gate-controlled switch, is connected to the two ends of signal source by common wire's section;
Described signal generating circuit comprises described signal source, and the on-off controller being connected with gate-controlled switch on each loop, and described signal source is connected in common wire's section;
Described on-off controller, by controlling the opening and closing of each gate-controlled switch, provides source signal to each loop respectively by described signal source.
5. system according to claim 4, is characterized in that, each gate-controlled switch is relay switch, and described on-off controller is controlled the break-make of corresponding circuit by pilot relay.
6. system according to claim 3, is characterized in that, described data acquisition circuit comprises: signal acquisition circuit and analog to digital conversion circuit, wherein:
Described signal acquisition circuit, for gathering the effective electric signal of each loop when source signal is provided;
Analog-digital conversion circuit as described, for convert the simulating signal of the electric signal of described signal acquisition circuit collection to corresponding digital signal to;
Described data processing circuit, the value of electrical signals collecting for obtaining analog-digital conversion circuit as described, determines whether the impervious barrier at the net point place on corresponding loop occurs seepage.
7. system according to claim 3, is characterized in that, also comprises:
Data communication module, is connected with described data acquisition circuit, and the electric signal for described data acquisition circuit is gathered, transfers to described data processing circuit by communication link.
8. according to the arbitrary described system of claim 3-7, it is characterized in that, described data processing circuit, is specially central controller.
9. system according to claim 8, is characterized in that, described central controller, and also for controlling described signal generating circuit, each loop forming to the arbitrary wire in the arbitrary wire in described the first wire group and the second wire group respectively provides source signal.
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