CN104111151A - Method for seepage detection of anti-seepage layer - Google Patents
Method for seepage detection of anti-seepage layer Download PDFInfo
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- CN104111151A CN104111151A CN201410299600.2A CN201410299600A CN104111151A CN 104111151 A CN104111151 A CN 104111151A CN 201410299600 A CN201410299600 A CN 201410299600A CN 104111151 A CN104111151 A CN 104111151A
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Abstract
The invention provides a method for seepage detection of an anti-seepage layer. The method includes laying a conductive grid under the anti-seepage layer, the conductive grid 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, grid points in the conductive grid are formed at the lead intersection positions, and two leads at each grid point are arranged in an insulated manner; a source signal is provided for each loop formed by any lead in the first lead group and any lead in the second lead group, and effective electrical signals in each loop are collected; and based on the electrical signals in each loop which are collected at different time, whether seepage occurs in the anti-seepage layer at the insertion position of two leads in each loop is determined. By adoption of the detection method provided by the invention, whether seepage of the anti-seepage layer 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 detection technique, relate in particular to a kind of seepage of seepage-proof layer detection method.
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 has exceeded 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.In the time that refuse is carried out to landfill disposal, for preventing that underground water, soil etc. are 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 whole nation hundreds of families will be newly-built solid waste landfill disposal facility, urgently adopt seepage of seepage-proof layer on-line monitoring and detection technique to its safe operation situation carry out supervising.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 method, 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 method, comprising:
Below impervious barrier, lay conductive grid, wherein, 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 the each net point in described conductive grid, two wire insulation settings at each net point place;
Provide source signal to each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group respectively, and gather respectively the effective electric signal in each loop;
Electric signal in the each loop gathering based on different time, determines whether the impervious barrier of the infall of two wires in each loop occurs seepage.
In above-mentioned method, described conductive grid is specially rectangular node, and the arbitrary wire square crossing in the arbitrary wire in described the first wire group and the second wire group arranges, and point of crossing place carries out insulation processing.
In above-mentioned method, the distance between each net point is identical, or in the scope of default value.
In above-mentioned method, on each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group, be respectively arranged with gate-controlled switch, be connected to the two ends of signal source by common wire's section;
Describedly provide source signal to each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group respectively, be specially:
By controlling the opening and closing of the gate-controlled switch on described each loop, provide source signal to each loop respectively by described signal source.
In above-mentioned method, each gate-controlled switch is relay switch.
In above-mentioned method, using the each wire being arranged in parallel by first direction in described the first wire group, respectively as the wire of directions X, number consecutively is X1, X2,, Xn, using the each wire being arranged in parallel by second direction in described the second wire group 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 utilization (Xi, Yj) in described conductive grid represents, wherein, 1≤i≤n, 1≤j≤m, represents the point of crossing forming between wire Yj that j in wire Xi and the second wire group that i in the first wire group is capable is capable;
Describedly provide source signal to each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group respectively, and gather respectively the effective electric signal in each loop, be specially:
Provide successively source signal to net point (X1, Y1), (X2, Y2) ..., (Xi, Yj) ..., (Xn, Ym) corresponding loop, in signal source being provided to loop corresponding to respective grid points, the current signal on measuring circuit;
The electric signal in the described each loop gathering based on different time, determine that whether the impervious barrier that obtains the infall of two wires in each loop occurs seepage, is specially:
According to the current signal detecting with for the voltage of the source signal that provides of this loop is provided, determine the resistance in each loop, the resistance value in loop corresponding net point (Xi, Yj) is designated as to Rijt1;
By net point (Xi, Yj) the background resistance value Rijt0 of the current resistance value Rijt1 measuring and previous moment compares, the resistance change rate kij obtaining, wherein background resistance value Rijt0 is the resistance value of the corresponding net point that measures while leaking of impervious barrier, kij=(Rijt0-Rijt1)/Rijt0*100%, wherein, i=1,2 wherein ..., n, j=1,2 ..., m;
By a matrix K of resistance change rate composition of the each net point measuring, so that according to this matrix K, in the time that the resistance change rate wherein occurring is greater than setting threshold, determine that seepage appears in corresponding net point place, and net point corresponding rate of change maximal value is defined as approaching most the net point of seepage; Or resistance change rate corresponding to each net point obtaining according to periodic measurement in certain a period of time, by observing resistance change rate situation of change corresponding to net point, determines seepage situation, wherein matrix K is:
The seepage of seepage-proof layer detection method that the embodiment of the present invention provides, can detect by the loop of the composition of wire between two with a point of crossing in the conductive grid that is arranged on impervious barrier below, the electric signal that can detect based on the each loop of different time, whether the point of crossing place that determines the wire in each loop produces Seepage, thereby can determine whether impervious barrier seepage occurs, and the position of seepage occurs.Detection method 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.
Brief description of the drawings
The circuit principle structure schematic diagram of realizing leak detection 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;
The schematic flow sheet of the seepage of seepage-proof layer detection method that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is the structural representation that the embodiment of the present invention realizes monitor and detection device in the circuit of leak detection;
Fig. 5 is the electrical block diagram of realizing a concrete application of embodiment of the present invention method;
Fig. 6 is the electrical block diagram of realizing another concrete application of embodiment of the present invention method.
Embodiment
For the situation of 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 by detecting the two wires compositions that form each net point in conductive grid in the time that different time conducts electricity respectively, whether the impervious barrier of determining corresponding each net point place there is seepage, and produces the position of seepage.To the realization of technical solution of the present invention be elaborated with instantiation below.
First, the detection principle of embodiment of the present invention detection method is described.
As shown in Figure 1, the circuit principle structure schematic diagram of realizing leak detection providing for the embodiment of the present invention.As shown in Figure 1, this seepage of seepage-proof layer testing circuit mainly 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 the loop of two wire compositions that form 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 a kind of 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 multiple 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 the each net point in conductive grid 10, thereby can form conductive grid 10; Meanwhile, two wire insulation settings at the 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,, refer to the loop of two wires compositions that form this net point when in loop corresponding to net point described below.
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, the each wire in the first wire group 101 be arranged in parallel at first direction, and the 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, the each net point position in conductive grid 10 can easily be determined, like this, in the time 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 wire and the second wire group in the first 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 wire in the first wire group and the second wire group in conductive grid except intersect by parallel vertical 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, in the time of 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, can determine based on this variation 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, form the electric signal in the loop of two wire compositions of each net point by sequence detection, just can determine whether corresponding net point place seepage occurs.In practical application, can, according to seepage of seepage-proof layer accuracy of detection needs, the network of suitable distance net point be set, and the network of suitable shape.
In practical application, for ease of determining of the relative position of the each net point in conductive grid 10, can sort in order to the wire of arranging by preset rules in each wire group in advance, and numbering, numbering that like this can be based on each wire, determines corresponding net point, when 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 the 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 the 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) represent, wherein, 1≤i≤n, 1≤j≤m, represents the point of crossing forming between wire Yj that j in wire Xi and the second wire group 102 that i in the first wire group 101 is capable is 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 be 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, in the time that subsequent detection judges to loop electric signal, can promptly and accurately judge the position that occurs seepage in impervious barrier.
In the present embodiment, monitor and detection device 20 can be respectively provides source signal to each loop of the arbitrary wire in the first wire group 101 and the arbitrary wire composition in the second wire group 102, and gather respectively the electric signal in each loop, and based on gather each loop in electric signal, determine whether the impervious barrier of the infall of two wires in each loop occurs seepage.Because two wires at the point of crossing place in each loop are insulation setting, if the impervious barrier generation Seepage of point of crossing place or adjacent, will change the electrical property (resistance that is mainly loop changes) in loop corresponding to respective grid points, therefore, just can determine according to the electrical property that detects loop 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 be by the variation of detectable voltage signals, determine whether net point place seepage occurs, 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 whether the impervious barrier above needs detection is laid on conductive grid leaks, just can detect successively the electric signal in the 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 specifically can be according to route wires time, 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, for example net point (Xi, Yj) just represent corresponding position, form this net point (Xi according to detecting, the electric signal in the loop of two wires composition Yj), 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.Corresponding one by one with the actual position coordinate of impervious barrier by each net point, like this, find a net point, just can determine accurately impervious barrier correspondence position.
Secondly, by monitor and detection device, provide signal source to loop corresponding to each net point respectively at different time, and in the time that 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, in 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 be 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 in the time that 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, when namely resistance change rate exceedes the threshold value of a setting, just can judge that seepage appears in this net point place or near impervious barrier.
In practical application, the background resistance value Rijt0 of current net point (Xi, Yj) the resistance value Rijt1 measuring and previous moment can be compared to the resistance change rate kij obtaining:
Kij=(Rijt0-Rijt1)/Rijt0*100%, wherein, wherein i=1,2 ..., 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, in the time that 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, in the time of 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 made up of wire Xa and wire Yb presents low-resistance feature, the resistance change rate kab measuring, this value is larger, for example, exceed setting threshold, just can determine and may occur seepage, further, can according to the resistance change rate kij comparison of 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 multiple net points, therefore, when impervious barrier generation seepage, can detect that the resistance change rate at adjacent continuous multiple net points place can exceed 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, in the time 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, by the resistance change rate in the matrix K of analysis different cycles, determine seepage range of scatter and seepage trend, can accurately orient the net point that occurs leakage, and then determine the position that seepage appears in impervious barrier.
The inventive method is carried out the principle of seepage of seepage-proof layer detection above, and testing circuit has been described in detail accordingly, below the concrete measuring process of measuring at impervious barrier is described.The schematic flow sheet of the seepage of seepage-proof layer detection method that Fig. 3 provides for the embodiment of the present invention.As shown in Figure 3, the present embodiment seepage of seepage-proof layer detection method specifically can comprise the steps:
Step 101, below impervious barrier, lay conductive grid, wherein, 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 the each net point in described conductive grid, two wire insulation settings at each net point place;
Step 102, provide source signal to each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group respectively, and gather respectively the effective electric signal in each loop;
Step 103, based on different time gather each loop in electric signal, determine whether the impervious barrier of the infall of two wires in each loop occurs seepage.
In above-mentioned steps 102, can, in the time that impervious barrier is laid in the region of antiseepage processing, first below impervious barrier, lay conductive grid.Wherein, conductive grid is specifically as follows the rectangular configuration shown in above-mentioned Fig. 2; Distance between each net point is identical, or in the scope of default value.
In above-mentioned steps 102, when the conductive grid adopting in step 101 is the rectangular configuration shown in Fig. 2, and be respectively arranged with gate-controlled switch on each loop of the arbitrary wire composition in the arbitrary wire in the first wire group and the second wire group, and while being connected to the two ends of signal source by common wire's section, this step specifically can be: by controlling the opening and closing of the gate-controlled switch on each loop, the signal source being connected by common wire's section by each loop provides source signal to each loop respectively.For ease of the control to gate-controlled switch, be connected on each loop and must specifically can be above-mentioned relay switch by gate-controlled switch.
Particularly, can be in advance using the each wire being arranged in parallel by first direction in the first wire group respectively as the wire of directions X, number consecutively is X1, X2,, Xn, using the each wire being arranged in parallel by second direction in the second wire group 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 utilization (Xi, Yj) in conductive grid represents, wherein, 1≤i≤n, 1≤j≤m, represents the point of crossing forming between wire Yj that j in wire Xi and the second wire group that i in the first wire group is capable is capable.
Now, above-mentioned steps 102 is providing source signal to each loop of the arbitrary wire composition in the arbitrary wire in the first wire group and the second wire group respectively, and gather respectively the effective electric signal in each loop, specifically can be: provide successively source signal to net point (X1, Y1), (X2, Y2) ..., (Xi, Yj) ..., (Xn, Ym) corresponding loop, in signal source being provided to loop corresponding to respective grid points, the current signal on measuring circuit.Wherein, between each loop, provide source signal the time interval can set time period, for example 2s or 1min etc.
Meanwhile, above-mentioned step 103, specifically can comprise the steps:
According to the current signal detecting with for the voltage of the source signal that provides of this loop is provided, determine the resistance in each loop, the resistance value in loop corresponding net point (Xi, Yj) is designated as to Rijt1;
By net point (Xi, Yj) the current resistance value Rijt1 measuring and background resistance value Rijt0 compare, the resistance change rate kij obtaining, wherein background resistance value Rijt0 is the resistance value of the corresponding net point that measures while leaking of impervious barrier:
Kij=(Rijt0-Rijt1)/Rijt0*100%, wherein, wherein i=1,2 ..., n, j=1,2 ..., m;
By a matrix K of resistance change rate composition of the each net point measuring, so that according to this matrix K, in the time that the resistance change rate wherein occurring is greater than setting threshold, determine that seepage appears in corresponding net point place, and net point corresponding rate of change maximal value is defined as approaching most the net point of seepage; Or resistance change rate corresponding to each net point obtaining according to periodic measurement in certain a period of time, by observing resistance change rate situation of change corresponding to net point, determines seepage situation, wherein, matrix K is:
Can find out by conductive grid is set below impervious barrier, and by measuring the electric signal of each conductive grid in the time switching on, determine whether net point place corresponding to each loop occurs seepage, thereby can realize the leak detection processing to impervious barrier.
Fig. 4 is the structural representation that the embodiment of the present invention realizes monitor and detection device in the circuit of leak detection.When embodiment of the present invention specific implementation, monitor and detection device shown in above-mentioned Fig. 1 specifically can comprise each circuit module as shown in Figure 4, particularly, as shown in Figure 4, 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 each loop of the arbitrary wire composition in arbitrary wire of the first wire group 101 and the second wire group 102 respectively;
Data acquisition circuit 202, in the time that signal generating circuit 201 provides source signal to a loop in each loop, gathers the effective electric signal in this loop;
Data processing circuit 203, the effective electric signal that is used for this loop collecting based on data acquisition circuit 202 judges whether two wire infalls in this loop occur seepage, simultaneously, the electric signal in the 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.When specific implementation, can be by signal generating circuit 201 in the time providing source signal for a loop, send a control signal and gather to data acquisition circuit 202; Or, can, by the default cycle, power respectively to each loop by signal generating circuit 201, 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 ensureing the same circuit to power, can gather the electric signal on it simultaneously; Or, also can give each loop power supply by predetermined period 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.
When the present embodiment method realizes, can, using Centralized Controller as data processing circuit 203, realize centralized control, concrete control simply, realizes feature easily, and in practical application, be not limited to this, as long as the electric signal can collect accurately the energising of each loop time.In the present embodiment, data acquisition circuit 202 is specially signal acquisition circuit, can be made up of current sensor etc., and particular circuit configurations is not particularly limited, as long as can collect the current signal on loop.
Fig. 5 is the electrical block diagram of realizing a concrete application of embodiment of the present invention method.As shown in Figure 5, in conductive grid 10, on each loop of the arbitrary wire composition in the arbitrary wire in the first wire group 101 and the second wire group 102, be respectively arranged with gate-controlled switch, and be connected to the two ends of signal source by common wire's section, particularly, as shown in Figure 5, 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 also all connected, 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 the multiple 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, provide source signal to loop corresponding to each net point in conductive grid respectively, be that signal source 2011 has a voltage, in the time that 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.
Wherein, 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 control effect respectively.The low-voltage control circuit that this on-off controller can be made up 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. 5, 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.
As shown in Figure 5, described data acquisition circuit 202 specifically can comprise signal acquisition circuit 2021 and analog to digital conversion circuit 2022, and 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 with 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.When 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 practical application, described data processing circuit 203 can be specifically a central controller, can be processed the signal gathering 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, provide respectively power supply to realize to each loop.
Fig. 6 is the electrical block diagram of realizing another concrete application of embodiment of the present invention method.As shown in Figure 6, different from circuit structure shown in above-mentioned Fig. 5 is, in the present embodiment, data processing circuit 203 also can be arranged on different positions from data acquisition circuit 202, be that 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 6, this monitor and detection device 20 also can comprise data communication module 204, be connected with data acquisition circuit 202, for the electric signal that data acquisition circuit is gathered, transfer 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 cables such as wired 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., it can carry out the data that automatic analyzing and testing obtains 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, in the time seepage being detected, can send warning message by warning device, so that can safeguard impervious barrier in time.
In the time 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, in the time 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.In the time that 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 method that the embodiment of the present invention provides, can detect by the loop of the composition of wire between two with a point of crossing in the conductive grid that is arranged on impervious barrier below, the electric signal that can detect based on the each loop of different time, whether the point of crossing place that determines the wire in each loop produces Seepage, thereby can determine whether impervious barrier seepage occurs, and the position of 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.In the time that 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: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; 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 amendments 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 (6)
1. a seepage of seepage-proof layer detection method, is characterized in that, comprising:
Below impervious barrier, lay conductive grid, wherein, 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 the each net point in described conductive grid, two wire insulation settings at each net point place;
Provide source signal to each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group respectively, and gather respectively the effective electric signal in each loop;
Electric signal in the each loop gathering based on different time, determines whether the impervious barrier of the infall of two wires in each loop occurs seepage.
2. method according to claim 1, is characterized in that, described conductive grid is specially rectangular node, and the arbitrary wire square crossing in the arbitrary wire in described the first wire group and the second wire group arranges, and point of crossing place carries out insulation processing.
3. method according to claim 1 and 2, is characterized in that, the distance between each net point is identical, or in the scope of default value.
4. method according to claim 1, is characterized in that, on each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group, is respectively arranged with gate-controlled switch, is connected to the two ends of signal source by common wire's section;
Describedly provide source signal to each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group respectively, be specially:
By controlling the opening and closing of the gate-controlled switch on described each loop, provide source signal to each loop respectively by described signal source.
5. method according to claim 4, is characterized in that, each gate-controlled switch is relay switch.
6. method according to claim 1 and 2, is characterized in that, using the each wire being arranged in parallel by first direction in described the first wire group respectively as the wire of directions X, number consecutively is X1, X2 ... Xn, using the each wire being arranged in parallel by second direction in described the second wire group 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 utilization (Xi, Yj) in described conductive grid represents, wherein, 1≤i≤n, 1≤j≤m, represents the point of crossing forming between wire Yj that j in wire Xi and the second wire group that i in the first wire group is capable is capable;
Describedly provide source signal to each loop of the arbitrary wire composition in the arbitrary wire in described the first wire group and the second wire group respectively, and gather respectively the effective electric signal in each loop, be specially:
Provide successively source signal to net point (X1, Y1), (X2, Y2) ..., (Xi, Yj) ..., (Xn, Ym) corresponding loop, in signal source being provided to loop corresponding to respective grid points, the current signal on measuring circuit;
The electric signal in the described each loop gathering based on different time, determine that whether the impervious barrier that obtains the infall of two wires in each loop occurs seepage, is specially:
According to the current signal detecting with for the voltage of the source signal that provides of this loop is provided, determine the resistance in each loop, the resistance value in loop corresponding net point (Xi, Yj) is designated as to Rijt1;
By net point (Xi, Yj) the background resistance value Rijt0 that the current resistance value Rijt1 measuring and previous moment are measured compares, the resistance change rate kij obtaining, wherein background resistance value Rijt0 is the resistance value of the corresponding net point that measures while leaking of impervious barrier, kij=(Rijt0-Rijt1)/Rijt0*100%, wherein, i=1,2 wherein ..., n, j=1,2 ..., m;
By a matrix K of resistance change rate composition of the each net point measuring, so that according to this matrix K, in the time that the resistance change rate wherein occurring is greater than setting threshold, determine that seepage appears in corresponding net point place, and net point corresponding rate of change maximal value is defined as approaching most the net point of seepage; Or resistance change rate corresponding to each net point obtaining according to periodic measurement in certain a period of time, by observing resistance change rate situation of change corresponding to net point, determines seepage situation, wherein matrix K is:
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