CN105136859A - Two-dimensional concrete health monitoring method based on reinforcing steel bar electrodes - Google Patents
Two-dimensional concrete health monitoring method based on reinforcing steel bar electrodes Download PDFInfo
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Abstract
The invention discloses a two-dimensional concrete health monitoring method based on reinforcing steel bar electrodes. N mutual-parallel reinforcing steel bar electrodes linearly laid on a same horizontal plane in two-dimensional concrete are connected to a concrete parameter measurement circuit, under control of a microprocessor, signals with different frequencies are emitted by a sine signal generator, and through concrete voltage amplification and resistance voltage amplification, different-frequency impedance modulus and phase positions of all the electrodes on the two-dimensional concrete are measured. The same-specification normal two-dimensional concrete impedance modulus and phase position values measured under different frequencies are compared with those of the measured two-dimensional concrete, the health condition of the two-dimensional concrete is determined, and a specific position of an unusual condition of the concrete is found out. The method has the beneficial effects that the two-dimensional concrete health condition is real-timely monitored, quality evaluation of buildings is timely done, and concrete lesions are forecasted and forewarned. The invention provides the two-dimensional concrete parameter measurement circuit convenient and reliable to use and remarkable in detection effect.
Description
(1) technical field
The invention belongs to building materials to detect, relate to concrete quality test, particularly based on the health monitoring of reinforcing bar electrode two dimension concrete.
(2) background technology
Concrete is a kind of important construction material being widely used in building construction, science of bridge building, hydraulic engineering etc., and concrete health detection and monitoring instrument ensure the permanent technological means run of concrete safety.The prediction of concrete health, forecast, diagnosis are badly in need of one of main bugbear of capturing in the world now.Highway, bridge, dam and other work covil construction, all need to carry out regular or real-time health detection and monitoring.But existing RC axial loading column means can't adapt to the needs of development completely.The patent No. is ZL2006100200932.8 Chinese patent " concrete damage detection method and equipment based on impedance imaging ", to detect for the purpose of concrete damage, have employed the technology of impedance imaging, achieves better effects.But in actual use, because detecting electrode and concrete can not be well compatible, there is certain application limitation.
The patent No. is the Chinese patent " taking reinforcing bar as the concrete crack detector of electrode " of ZL201210199249.0, utilizes the relation between emitting electrode pumping signal and the response signal of receiving electrode, judges distress in concrete.The main fracture detection of this invention, does not detect other abnormal behaviour.
The patent No. is the Chinese patent " taking reinforcing bar as concrete monitor and the monitor and detection method of electrode " of ZL201310029782.7, utilizes reinforcing bar to do electrode, detects the electrical quantity between two reinforcing bar electrodes, judge distress in concrete.This invention proposes a kind of method for supervising, but does not provide different method of testings according to the different structure of reinforced concrete.
(3) summary of the invention
The object of the invention is providing a kind of two-dimentional concrete health monitor method based on reinforcing bar electrode, for the planar two dimension concrete being provided with parallel rebar provides health detection, Timeliness coverage concrete pathology forecasting and warning.
The object of the invention is to reach like this:
Utilize the n root reinforcing bar electrode be parallel to each other of the equidistant laying of same level Linear in two-dimentional concrete, make planar two dimension concrete, by interface unit by reinforcing bar Electrode connection to concrete parameters metering circuit, under micro-processor control, in concrete parameters metering circuit, sinusoidal signal generator sends different frequency signals, by multi-way switch gating potential electrode, by concrete voltage amplifier, voltage amplification is carried out to detected concrete both end voltage, by resistive voltage amplifier, voltage amplification is carried out to reference resistance both end voltage, the modulus of impedance of different frequency and the measurement and monitoring of phase place are carried out to each interelectrode concrete on two-dimentional concrete, the modulus of impedance of different frequency and the measurement of phase place comprise measures the interelectrode concrete parameters in two, the centre of adjacent four reinforcing bar electrodes, parameter measurement three part between planar two dimension concrete all adjacent reinforcing bar electrodes under parameter measurement and multiple typical frequencies between planar two dimension concrete all adjacent reinforcing bar electrodes under single-frequency.
Measure in the interelectrode concrete parameters in two, the centre of four reinforcing bar electrodes adjacent to concrete is measured and obtain concrete modulus of impedance and phase value between middle two reinforcing bar electrodes.Under single-frequency in all parameter measurements of planar two dimension concrete, under survey frequency, concrete between all adjacent reinforcing bar in two-dimentional concrete is carried out modulus of impedance and phase value measurement, and the modulus of impedance obtained between the concrete all adjacent electrodes of planar two dimension and phase value, under multiple typical frequencies between planar two dimension concrete all adjacent reinforcing bar electrodes in parameter measurement, several typical measured frequency is selected by microprocessor, under typical measured frequency, measure the concrete modulus of impedance between all adjacent reinforcing bar in two-dimentional concrete and phase value.
Under single-frequency and under multiple typical frequencies, the modulus of impedance between the concrete all adjacent electrodes of planar two dimension and phase value, all not included in the concrete modulus of impedance between both sides outermost reinforcing bar electrode and adjacent electrode and phase value.
By the concrete modulus of impedance between the adjacent reinforcing bar of normal two-dimentional concrete of same specification that records under multiple typical frequencies and phase value, compare with the corresponding measurement parameter of tested two-dimentional concrete respective frequencies correspondence position, judge two-dimentional concrete health status, and find out the particular location of concrete unusual condition according to the data of different measuring point.
By interface unit by reinforcing bar Electrode connection to the method for concrete parameters metering circuit be: interface unit is that n root reinforcing bar electrode and multi-way switch stube cable and multi-way switch combine, and n root reinforcing bar electrode is numbered consistent with the numbering of multi-way switch stube cable be connected reinforcing bar electrode; Every root reinforcing bar electrode and multi-way switch stube cable by an Electrode connector, the concentric cable of one one point four, 4 multi-way switch connectors are formed, and 4 multi-way switch connector sequence numbers are numbered 1-4; Multi-way switch combination selects a multi-way switch to form by four identical n, and microprocessor has control line to be connected to multi-way switch combination, and each n selects the gating of a multi-way switch by Microprocessor S3C44B0X, and 4 multi-way switchs are numbered No. 1-4 respectively; Multi-way switch has n cable connector, is numbered 1-n, and each reinforcing bar Electrode connection is on the reinforcing bar electrode of same sequence number and the Electrode connector of multi-way switch stube cable.
Sequence number is that the reinforcing bar electrode of K is connected with the cable connector 14-K of the multi-way switch being numbered 1 with the multi-way switch connector 12-1 of multi-way switch stube cable, sequence number is that the reinforcing bar electrode of K is connected with the cable connector 14-K of the multi-way switch being numbered 2 with the multi-way switch connector 12-2 of multi-way switch stube cable, sequence number is that the reinforcing bar electrode of K is connected with the cable connector 14-K of the multi-way switch being numbered 3 with the multi-way switch connector 12-3 of multi-way switch stube cable, sequence number is that the reinforcing bar electrode of K is connected with the cable connector 14-K of the multi-way switch being numbered 4 with the multi-way switch connector 12-4 of multi-way switch stube cable, wherein, K is more than or equal to 1, be less than or equal to n.
The selection of reinforcing bar electrode and layout are selected in conjunction with two-dimentional concrete designing requirement.The method to set up of two dimension concrete reinforcement electrode is: set n as reinforcing bar electrode sum, in concrete, same level Linear is laid and is parallel to each other and equidistant n root reinforcing bar electrode, is 1,2,3 by reinforcing bar electrode number consecutively ..., n-2, n-1, n; Reinforcing bar electrode is made up of reinforcing bar and cable-to-cable connector, reinforcing bar and cable-to-cable connector welding, and reinforcing bar requires in Transducers Embedded in Concrete according to Concrete Design, and it is outer for being connected to reinforcing bar electrode and multi-way switch stube cable that cable-to-cable connector exposes concrete.
Concrete parameters metering circuit by 4 measurement interfaces, communication interface, concrete voltage amplifier, resistance, sinusoidal signal generator, resistive voltage amplifier, concrete electric pressing mold number converter, resistive voltage analog to digital converter and microprocessor are formed; Measurement interface is sorted successively into measurement interface 1, measurement interface 2, measurement interface 3, measurement interface 4; Measurement interface 4 one end is connected with sinusoidal signal generator, and the other end is connected with the measurement connector of No. 4 multi-way switchs; Measurement interface 1 one end is connected with resistance, and the other end is connected with the measurement connector of No. 1 multi-way switch; Measurement interface 3 one end is connected with the positive input of concrete voltage amplifier, and the other end is connected with the measurement connector of No. 3 multi-way switchs; Measurement interface 2 one end is connected with the negative input of concrete voltage amplifier, and the other end is connected with the measurement connector of No. 2 multi-way switchs; Series circuit is formed together with the output port of the concrete that measurement interface 4 is connected with measurement interface 1 and sinusoidal signal generator, resistance; Simulating signal, by after the voltage amplification between measurement interface 2 and measurement interface 3, is converted to digital signal through concrete electric pressing mold number converter and gives microprocessor by concrete voltage amplifier; Resistive voltage amplifier amplifies the voltage at resistance two ends, through resistive voltage analog to digital converter, simulating signal is converted to digital signal and gives microprocessor; The frequency of Microprocessor S3C44B0X sinusoidal signal generator and the gating of multi-way switch; Communication interface is used for microprocessor and communicates with data acquisition server, sends the instruction of data acquisition server to microprocessor, sends the data of microprocessor to data acquisition server.
Described concrete parameters measuring process:
The first step under micro-processor control, select 4 adjacent reinforcing bar electrodes, in the face of 4 reinforcing bar electrodes, it is No. 1, No. 2, No. 3, No. 4 by reinforcing bar electrode number consecutively, combine respectively by the measurement interface 1 of No. 1 reinforcing bar Electrode connection to concrete parameters metering circuit by multi-way switch, No. 2 reinforcing bar Electrode connection are to the measurement interface 2 of concrete parameters metering circuit, No. 3 reinforcing bar Electrode connection are to measurement interface 3, No. 4 reinforcing bar Electrode connection of concrete parameters metering circuit to the measurement interface 4 of concrete parameters metering circuit;
Second step, microprocessor arrange the output frequency of sinusoidal signal generator, and are represented by output frequency f;
3rd step, the sample frequency arranging concrete electric pressing mold number converter and resistive voltage analog to digital converter are 100 times of f, gather the output data of concrete electric pressing mold number converter and resistive voltage analog to digital converter simultaneously, continuous acquisition data 100, by the data DH1 of concrete electric pressing mold number converter, DH2, DH3, DH98, DH99, DH100 represent; By the data DZ1 of resistive voltage analog to digital converter, DZ2, DZ3 ..., DZ98, DZ99, DZ100 represent;
4th step, calculating DH1, DH2, DH3 ..., the mean value of DH98, DH99, DH100, if mean value is Pdh, calculates DZ1, DZ2, DZ3 ..., the mean value of DZ98, DZ99, DZ100, if mean value is Pdz;
5th step, calculating CH1, CH2, CH3 ..., the value of CH98, CH99, CH100, wherein CH1=DH1-Pdh; CH2=DH2-Pdh; CH3=DH3-Pdh; CH98=DH98-Pdh; CH99=DH99-Pdh; CH100=DH100-Pdh;
6th step, calculating CZ1, CZ2, CZ3 ..., the value of CZ98, CZ99, CZ100, wherein CZ1=DZ1-Pdz; CZ2=DZ2-Pdz; CZ3=DZ3-Pdz; CZ98=DZ98-Pdz; CZ99=DZ99-Pdz; CZ100=DZ100-Pdz;
7th step, calculating CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100, and by CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100 is added, if CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100 be added obtain and be Sch;
8th step, calculating CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100, and by CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100 is added, if CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100 be added obtain and be Scz;
9th step, use Sch are divided by Scz, and the business obtained is called modulus of impedance, is designated as ZKM;
Tenth step, search CH1, CH2, CH3 ..., CH98, CH99, CH100 become the zero passage sequence number of successively decreasing of negative from positive number; The method of searching zero passage sequence number of successively decreasing is, if CHn is positive number or zero, CHn+1 is negative, then zero passage of successively decreasing sequence number is n, and zero passage of successively decreasing sequence number is recorded as JHn; Search CH1, CH2, CH3 ..., what CH98, CH99, CH100 became positive number from negative increases progressively zero passage sequence number; Searching the method increasing progressively zero passage sequence number is, if CHm is negative or zero, CHm+1 is positive number, then increasing progressively zero passage sequence number is m, will increase progressively zero passage sequence number and be recorded as JHm; If do not find JHn, then make JHn=JHm+50;
11 step, search CZ1, CZ2, CZ3 ... CZ98, CZ99, CZ100 become the zero passage sequence number of successively decreasing of negative from positive number, and the method for searching zero passage sequence number of successively decreasing is, if CZn is positive number or zero, CZn+1 is negative, then zero passage of successively decreasing sequence number is n, and zero passage of successively decreasing sequence number is recorded as JZn; Search CZ1, CZ2, CZ3 ... what CZ98, CZ99, CZ100 became positive number from negative increases progressively zero passage sequence number, and searching the method increasing progressively zero passage sequence number is, if CZm is negative or zero, CZm+1 is positive number, then increasing progressively zero passage sequence number is m, will increase progressively zero passage sequence number and be recorded as JZm; If do not find JZn, then make JZn=JZm+50;
If the value of the 12 step JHn – JZn is less than-25, then CHZ=100+JHn – JZn;
If the value of JHn – JZn is greater than 25, then CHZ=JHn – JZn-100;
If the value of JHn – JZn is between-25 to 25, then CHZ=JHn – JZn;
CHZ is called phase place.
The all parameter measurement steps of described planar two dimension concrete are:
The first step, by No. 1 multi-way switch, by No. 1 reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by No. 2 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by No. 3 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by No. 4 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKM1, and the phase place of measurement is designated as CHZ1;
Second step, by No. 1 multi-way switch, by No. 2 reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by No. 3 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by No. 4 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by No. 5 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKM2, and the phase place of measurement is designated as CHZ2;
3rd step, by No. 1 multi-way switch, by i reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by i+1 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by i+2 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by i+3 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKMi, and it is the integer being greater than 2 and being less than or equal to n-3 that the phase place of measurement is designated as CHZi.i.
The step of control measurement is:
The first step, data acquisition server select several typical survey frequency, if typical measured frequency is f1, f2 ... fk, sends to microprocessor by typical measured frequency by communication interface;
Second step, method according to planar two dimension concrete all parameter measurement steps under single-frequency, for frequency f 1, f2, fk, measure the modulus of impedance ZKMi that the normal two dimension of same specification is concrete respectively, phase place CHZi, wherein i is the integer being more than or equal to 1 and being less than or equal to n-3, and by transmitting measured values to data acquisition server; By data acquisition server by frequency f 1, f2 ... fk records normal two-dimentional concrete modulus of impedance ZKMi, phase place CHZi respectively, and wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3;
3rd step, under purpose monitoring state, for frequency f 1, f2, fk, measures the concrete modulus of impedance ZKMi of monitored two dimension, phase place CHZi respectively in real time, wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3, and by transmitting measured values to data acquisition server;
4th step, data acquisition server are for frequency f 1, f2, fk is monitored two-dimentional concrete modulus of impedance ZKMi under comparing same frequency respectively, phase place CHZi, with the difference of normal two-dimentional concrete modulus of impedance ZKMi, phase place CHZi, as larger in there is data deviation ratio, then judge that monitored concrete is abnormal, and abnormity point is between i+1 electrode to i+2 electrode; Wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3.
Good effect of the present invention is:
1, detect two-dimentional concrete health status, and make quality evaluation in time to buildings, the building concrete security situation of the people's livelihood that count for much such as particularly building construction, science of bridge building, hydraulic engineering makes accurate judgment.
2, can Real-Time Monitoring concrete health status, Timeliness coverage concrete pathology forecasting and warning, eliminate security incident before generation, avoid major accident to occur.
3, can be two-dimentional concrete health monitoring and provide testing tool, easy to use and reliable, Detection results is remarkable.
(4) accompanying drawing explanation
Fig. 1 is main assembly schematic diagram of the present invention.
Fig. 2 is planar two dimension concrete schematic diagram.
Fig. 3 is reinforcing bar electrode structure schematic diagram.
Fig. 4 is reinforcing bar electrode and multi-way switch stube cable.
Fig. 5 is that the n in multi-way switch combination selects a switch composition structural drawing.
Fig. 6 is concrete parameters metering circuit figure.
Fig. 7 is that in embodiment, n selects a switch to be chosen as 64 to select an on-off circuit figure.
Fig. 8 is sinusoidal signal generator circuit diagram in concrete parameters metering circuit.
Fig. 9 is amplifying circuit, and concrete voltage amplifier and resistive voltage amplifier adopt identical amplifying circuit
Figure 10 is in embodiment, and the circuit diagram of TMS320F2812 integrated circuit selected by microprocessor.
In figure, 1 planar two dimension concrete, 2 reinforcing bar electrodes and multi-way switch stube cable, 3 multi-way switch combinations, 4 concrete parameters metering circuits, 5 data acquisition servers, 6 concrete, 7-1 ~ 7-n reinforcing bar electrode, 8 reinforcing bars, 9 cable-to-cable connectors, 10 Electrode connectors, 11 1 point of four concentric cable, 12-1 ~ 12-4 multi-way switch connector, 13n selects an on-off circuit, 14-1 ~ 14-n cable connector, 15 measure connector, 16-1 ~ 16-4 measurement interface, 17 concrete voltage amplifiers, 18 resistance, 19 sinusoidal signal generators, 20 resistive voltage amplifiers, 21 concrete electric pressing mold number converters, 22 resistive voltage analog to digital converters, 23 microprocessors, 24 communication interfaces.
(5) embodiment
The present invention is based on the concrete health monitoring of two dimension of reinforcing bar electrode.See accompanying drawing 1.One-piece construction comprises that planar two dimension concrete 1, reinforcing bar electrode and multi-way switch stube cable 2, multi-way switch combine 3, concrete parameters metering circuit 4 and data acquisition server 5.
See Fig. 2,3.
According to Concrete Design requirement, determine concrete reinforcing bar electrode sum n.In the present embodiment, the reinforcing bar electrode sum n=64 of setting.In concrete 6, same level Linear equidistantly lays the n root reinforcing bar electrode 7-1 ~ 7-n be parallel to each other, and is 1,2,3 by reinforcing bar electrode number consecutively ..., n-2, n-1, n.Reinforcing bar electrode is made up of reinforcing bar 8 and cable-to-cable connector 9, and reinforcing bar 8 and cable-to-cable connector 9 weld, and in reinforcing bar 8 Transducers Embedded in Concrete, it is outer for being connected to reinforcing bar electrode and multi-way switch stube cable 2 that cable-to-cable connector 9 exposes concrete.
See Fig. 4.
Reinforcing bar electrode is connected with multi-way switch for reinforcing bar electrode with multi-way switch stube cable 2.Reinforcing bar electrode and multi-way switch stube cable be total n root always, all reinforcing bar electrodes all adopt identical structure with multi-way switch stube cable, every root reinforcing bar electrode and multi-way switch stube cable are by an Electrode connector 10, concentric cable 11,4 multi-way switch connector 12-1 ~ 12-4 of one one point four are formed.Reinforcing bar electrode is numbered consistent with the numbering of multi-way switch stube cable be connected reinforcing bar electrode.4 multi-way switch connector sequence numbers are numbered 1-4, and select the cable connector of a switch to be connected with the n of same sequence number.
See Fig. 5,7.
Multi-way switch combination 3 selects a switch to form by four identical n.Select a switch to be numbered No. 1-4 respectively 4 n, n selects the use of a switch by Microprocessor S3C44B0X.
N selects a switch composition structure as Fig. 5.N select a switch by n select an on-off circuit 13, cable connector 14-1 ~ 14-n, measure connector 15 form.N selects a switch to have n cable connector, is numbered 1-n, and cable connector is connected with the multi-way switch connector of multi-way switch stube cable with the reinforcing bar electrode of same sequence number.Measure connector 15 to be connected with the measurement interface of concrete parameters metering circuit.
The n of the present embodiment selects an on-off circuit to be 64 select an on-off circuit circuit.
64 select the n of to select an on-off circuit as Fig. 7.Be made up of the chip MM74HC4051 of 9 National Semiconductors, U1 ~ U9.In figure, link N1 ~ N64 is connected with 64 BNC females respectively, and BNC female is connected with the multi-way switch connector of multi-way switch stube cable with reinforcing bar electrode.Link A, B, C, E, D, F are connected with microprocessor.
See Fig. 6,8,9,10.
Concrete parameters metering circuit is critical component of the present invention.Concrete parameters metering circuit has 4 measurement interface 16-1 ~ 16-4, is sorted successively by measurement interface as measurement interface 1, measurement interface 2, measurement interface 3, measurement interface 4.Measurement interface 4 one end is connected with sinusoidal signal generator 19, and the other end is connected with the measurement connector 15 of No. 4 multi-way switchs.Measurement interface 1 one end is connected with resistance 18, and the other end is connected with the measurement connector 15 of No. 1 multi-way switch.Measurement interface 3 one end is connected with the positive input of concrete voltage amplifier 17, and the other end is connected with the measurement connector 15 of No. 3 multi-way switchs.Measurement interface 2 one end is connected with the negative input of concrete voltage amplifier 17, and the other end is connected with the measurement connector 15 of No. 2 multi-way switchs.Series circuit is formed together with the output port of the concrete that measurement interface 4 is connected with measurement interface 1 and sinusoidal signal generator 19, resistance 18.Simulating signal, by after the voltage amplification between measurement interface 2 and measurement interface 3, is converted to digital signal through concrete electric pressing mold number converter 21 and gives microprocessor 23 by concrete voltage amplifier 17.Resistive voltage amplifier 20 amplifies the voltage at resistance 18 two ends, through resistive voltage analog to digital converter 22, simulating signal is converted to digital signal and gives microprocessor 23.The frequency of Microprocessor S3C44B0X sinusoidal signal generator, controls the gating of multi-way switch.Communication interface 24 communicates with data acquisition server for microprocessor, sends the instruction of data acquisition server to microprocessor, sends the data of microprocessor to data acquisition server.
Sinusoidal signal generator circuit diagram is as Fig. 8. and sinusoidal signal generator US is DDS integrated circuit, and model is AD9852, is produced by AnalogDevices company of the U.S..
Concrete voltage amplifier and resistive voltage amplifier adopt identical amplifying circuit, as Fig. 9.UA1 be National Semiconductor produce integrated circuit DAC1210, UA2 be ANALOGDEVICES company of the U.S. produce integrated circuit AD811.A_IN be analog input end, A_OUT for amplify output terminal.A_D1-A_D10 is connected to microprocessor, is set to gain size under micro-processor control.
Figure 10 is the microcontroller circuit figure that the present embodiment adopts.The integrated circuit TMS320F2812 that microprocessor selects Texas Instruments to produce, this integrated circuit is integrated with analog to digital converter.In figure, ADC_IN1 is connected to concrete voltage amplifier, and ADC_IN2 is connected to resistance soil voltage amplifier.DDS_A0-DDS_A5, DDS_D0-DDS_D7 are sinusoidal signal generator control interface, are connected to sinusoidal signal generator.A_D1-A_D10 is connected to programmable amplifier, controls the enlargement factor of programmable amplifier.
Data acquisition server selects various types of computer, such as notebook or desktop computer.Be connected with microprocessor by communication interface, for sending order to microprocessor, or receive the data of microprocessor, and judge whether concrete has exception.
Communication interface circuit in the present embodiment adopts Zhengzhou one to lead Electronic Science and Technology Co., Ltd. M905R-433 wireless transparent transport module, and data acquisition server and microprocessor respectively connect one, forms wireless communication interface.
Being chosen as of the miscellaneous part of the present embodiment: cable-to-cable connector 9 is the male of bnc connector; Electrode connector 10 is the female of bnc connector; Multi-way switch connector 12 is the male of bnc connector; Cable connector 14-1 ~ 14-n is the female of bnc connector; Measuring connector 15 is the male of bnc connector; Measurement interface 16-1 ~ 16-4 is the female of bnc connector.
The detection of the present invention to two dimensional steel reinforced concrete is implemented by microprocessor.In Microprocessor S3C44B0X concrete parameters metering circuit, sinusoidal signal generator sends different frequency signals, the voltage signal at concrete and resistance two ends is amplified by amplifying circuit, the modulus of impedance of different frequency and the real-time measurement and monitoring of phase place are carried out to each electrode on two-dimentional concrete, measuring process mainly comprises to be measured two interelectrode concrete parameters in the middle of adjacent four reinforcing bar electrodes, parameter measurement three part between planar two dimension concrete all adjacent reinforcing bar electrodes under parameter measurement and multiple typical frequencies between planar two dimension concrete all adjacent reinforcing bar electrodes under single-frequency
Two interelectrode concrete parameters measuring processs in the middle of adjacent four reinforcing bar electrodes:
The first step under micro-processor control, select 4 adjacent reinforcing bar electrodes, in the face of 4 reinforcing bar electrodes, it is No. 1, No. 2, No. 3, No. 4 by reinforcing bar electrode number consecutively, combine respectively by the measurement interface 1 of No. 1 reinforcing bar Electrode connection to concrete parameters metering circuit by multi-way switch, No. 2 reinforcing bar Electrode connection are to the measurement interface 2 of concrete parameters metering circuit, No. 3 reinforcing bar Electrode connection are to measurement interface 3, No. 4 reinforcing bar Electrode connection of concrete parameters metering circuit to the measurement interface 4 of concrete parameters metering circuit;
Second step, microprocessor arrange the output frequency of sinusoidal signal generator, and are represented by output frequency f;
3rd step, the sample frequency arranging concrete electric pressing mold number converter and resistive voltage analog to digital converter are 100 times of f, gather the output data of concrete electric pressing mold number converter and resistive voltage analog to digital converter simultaneously, continuous acquisition data 100, by the data DH1 of concrete electric pressing mold number converter, DH2, DH3, DH98, DH99, DH100 represent; By the data DZ1 of resistive voltage analog to digital converter, DZ2, DZ3 ..., DZ98, DZ99, DZ100 represent;
4th step, calculating DH1, DH2, DH3 ..., the mean value of DH98, DH99, DH100, if mean value is Pdh, calculates DZ1, DZ2, DZ3 ..., the mean value of DZ98, DZ99, DZ100, if mean value is Pdz;
5th step, calculating CH1, CH2, CH3 ..., the value of CH98, CH99, CH100, wherein CH1=DH1-Pdh; CH2=DH2-Pdh; CH3=DH3-Pdh; CH98=DH98-Pdh; CH99=DH99-Pdh; CH100=DH100-Pdh;
6th step, calculating CZ1, CZ2, CZ3 ..., the value of CZ98, CZ99, CZ100, wherein CZ1=DZ1-Pdz; CZ2=DZ2-Pdz; CZ3=DZ3-Pdz; CZ98=DZ98-Pdz; CZ99=DZ99-Pdz; CZ100=DZ100-Pdz;
7th step, calculating CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100, and by CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100 is added, if CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100 be added obtain and be Sch;
8th step, calculating CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100, and by CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100 is added, if CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100 be added obtain and be Scz;
9th step, use Sch are divided by Scz, and the business obtained is called modulus of impedance, is designated as ZKM;
Tenth step, search CH1, CH2, CH3 ..., CH98, CH99, CH100 become the zero passage sequence number of successively decreasing of negative from positive number; The method of searching zero passage sequence number of successively decreasing is, if CHn is positive number or zero, CHn+1 is negative, then zero passage of successively decreasing sequence number is n, and zero passage of successively decreasing sequence number is recorded as JHn; Search CH1, CH2, CH3 ..., what CH98, CH99, CH100 became positive number from negative increases progressively zero passage sequence number; Searching the method increasing progressively zero passage sequence number is, if CHm is negative or zero, CHm+1 is positive number, then increasing progressively zero passage sequence number is m, will increase progressively zero passage sequence number and be recorded as JHm; If do not find JHn, then make JHn=JHm+50;
11 step, search CZ1, CZ2, CZ3 ... CZ98, CZ99, CZ100 become the zero passage sequence number of successively decreasing of negative from positive number, and the method for searching zero passage sequence number of successively decreasing is, if CZn is positive number or zero, CZn+1 is negative, then zero passage of successively decreasing sequence number is n, and zero passage of successively decreasing sequence number is recorded as JZn; Search CZ1, CZ2, CZ3 ... what CZ98, CZ99, CZ100 became positive number from negative increases progressively zero passage sequence number, and searching the method increasing progressively zero passage sequence number is, if CZm is negative or zero, CZm+1 is positive number, then increasing progressively zero passage sequence number is m, will increase progressively zero passage sequence number and be recorded as JZm; If do not find JZn, then make JZn=JZm+50;
If the value of the 12 step JHn – JZn is less than-25, then CHZ=100+JHn – JZn;
If the value of JHn – JZn is greater than 25, then CHZ=JHn – JZn-100;
If the value of JHn – JZn is between-25 to 25, then CHZ=JHn – JZn;
CHZ is called phase place.
Under single-frequency, all parameter measurement steps of planar two dimension concrete are:
The first step, by No. 1 multi-way switch, by No. 1 reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by No. 2 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by No. 3 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by No. 4 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKM1, and the phase place of measurement is designated as CHZ1;
Second step, by No. 1 multi-way switch, by No. 2 reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by No. 3 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by No. 4 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by No. 5 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKM2, and the phase place of measurement is designated as CHZ2;
3rd step, by No. 1 multi-way switch, by i reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by i+1 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by i+2 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by i+3 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKMi, and it is the integer being greater than 2 and being less than or equal to n-3 that the phase place of measurement is designated as CHZi.i.
Under multiple typical frequencies, between planar two dimension concrete all adjacent reinforcing bar electrodes, the step of parameter measurement is:
The first step, data acquisition server select several typical survey frequency, if typical measured frequency is f1, f2 ... fk, sends to microprocessor by typical measured frequency by communication interface;
Second step, method according to planar two dimension concrete all parameter measurement steps under single-frequency, for frequency f 1, f2, fk, measure the modulus of impedance ZKMi that the normal two dimension of same specification is concrete respectively, phase place CHZi, wherein i is the integer being more than or equal to 1 and being less than or equal to n-3, and by transmitting measured values to data acquisition server; By data acquisition server by frequency f 1, f2 ... fk records normal two-dimentional concrete modulus of impedance ZKMi, phase place CHZi respectively, and wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3;
3rd step, under purpose monitoring state, for frequency f 1, f2, fk, measures the concrete modulus of impedance ZKMi of monitored two dimension, phase place CHZi respectively in real time, wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3, and by transmitting measured values to data acquisition server;
4th step, data acquisition server are for frequency f 1, f2, under fk compares same frequency respectively, the concrete modulus of impedance ZKMi of monitored two dimension, phase place CHZi, with the difference of normal two-dimentional concrete modulus of impedance ZKMi, phase place CHZi, as occurred, data deviation ratio is comparatively large, then judge that monitored concrete is abnormal, and abnormity point is between i+1 electrode to i+2 electrode; Wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3.
Claims (8)
1. the two-dimentional concrete health monitor method based on reinforcing bar electrode, it is characterized in that: the n root reinforcing bar electrode be parallel to each other utilizing the equidistant laying of same level Linear in two-dimentional concrete, make planar two dimension concrete (1), by interface unit by reinforcing bar Electrode connection to concrete parameters metering circuit (4), under micro-processor control, in concrete parameters metering circuit (4), sinusoidal signal generator (19) sends different frequency signals, by multi-way switch gating potential electrode; By concrete voltage amplifier (17), voltage amplification is carried out to detected concrete both end voltage; By resistive voltage amplifier (20), voltage amplification is carried out to reference resistance both end voltage; The modulus of impedance of different frequency and the measurement and monitoring of phase place are carried out to each interelectrode concrete on two-dimentional concrete, the modulus of impedance of different frequency and the measurement of phase place comprise two, the centre interelectrode concrete parameters of adjacent four reinforcing bar electrodes is measured, parameter measurement three part between planar two dimension concrete all adjacent reinforcing bar electrodes under parameter measurement and multiple typical frequencies between planar two dimension concrete all adjacent reinforcing bar electrodes under single-frequency;
Measure in the interelectrode concrete parameters in two, the centre of four reinforcing bar electrodes adjacent to concrete is measured and obtain concrete modulus of impedance and phase value between middle two reinforcing bar electrodes; Under single-frequency in all parameter measurements of planar two dimension concrete, under survey frequency, concrete between all adjacent reinforcing bar in two-dimentional concrete is carried out modulus of impedance and phase value measurement, and the modulus of impedance obtained between the concrete all adjacent electrodes of planar two dimension and phase value; Under multiple typical frequencies between planar two dimension concrete all adjacent reinforcing bar electrodes in parameter measurement, several typical measured frequency is selected by microprocessor, under typical measured frequency, measure the concrete modulus of impedance between all adjacent reinforcing bar in two-dimentional concrete and phase value; Under single-frequency and under multiple typical frequencies, the modulus of impedance between the concrete all adjacent electrodes of planar two dimension and phase value, all not included in concrete modulus of impedance and phase value between both sides outermost reinforcing bar electrode and adjacent electrode;
By the concrete modulus of impedance between the adjacent reinforcing bar of normal two-dimentional concrete of same specification that records under multiple typical frequencies and phase value, compare with the corresponding measurement parameter of tested two-dimentional concrete respective frequencies correspondence position, judge two-dimentional concrete health status, and find out the particular location of concrete unusual condition according to the data of different measuring point.
2. as claimed in claim 1 based on the two-dimentional concrete health monitor method of reinforcing bar electrode, it is characterized in that: by interface unit by reinforcing bar Electrode connection to the method for concrete parameters metering circuit (4) be: interface unit is that n root reinforcing bar electrode and multi-way switch stube cable (2) and multi-way switch combine (3), and n root reinforcing bar electrode is numbered consistent with the numbering of multi-way switch stube cable (2) be connected reinforcing bar electrode (7-1 ~ 7-n); Every root reinforcing bar electrode and multi-way switch stube cable (2) are by an Electrode connector (10), the concentric cable (11) of one one point four, 4 multi-way switch connectors (12-1 ~ 12-4) are formed, and 4 multi-way switch connector sequence numbers are numbered 1-4; Multi-way switch combination selects a multi-way switch to form by four identical n, microprocessor (23) has control line to be connected to multi-way switch combination, each n selects the gating of a multi-way switch to control by microprocessor (23), and 4 multi-way switchs are numbered No. 1-4 respectively; Multi-way switch has n cable connector (14-1 ~ 14-n), is numbered 1-n, and each reinforcing bar Electrode connection is on the reinforcing bar electrode of same sequence number and the Electrode connector (10) of multi-way switch stube cable (2).
3. as claimed in claim 2 based on the two-dimentional concrete health monitor method of reinforcing bar electrode, it is characterized in that: the reinforcing bar electrode of described each reinforcing bar Electrode connection to same sequence number and the Electrode connector (10) of multi-way switch stube cable (2), its concrete connection is:
Sequence number is that the reinforcing bar electrode of K is connected with the cable connector (14-K) of the multi-way switch connector (12-1) of multi-way switch stube cable (2) with the multi-way switch being numbered 1, sequence number is that the reinforcing bar electrode of K is connected with the cable connector (14-K) of the multi-way switch connector (12-2) of multi-way switch stube cable (2) with the multi-way switch being numbered 2, sequence number is that the reinforcing bar electrode of K is connected with the cable connector (14-K) of the multi-way switch connector (12-3) of multi-way switch stube cable (2) with the multi-way switch being numbered 3, sequence number is that the reinforcing bar electrode of K is connected with the cable connector (14-K) of the multi-way switch connector (12-4) of multi-way switch stube cable (2) with the multi-way switch being numbered 4, wherein, all K are more than or equal to 1, be less than or equal to n.
4. as claimed in claim 1 based on the two-dimentional concrete health monitor method of reinforcing bar electrode, it is characterized in that: the selection of reinforcing bar electrode and layout are selected in conjunction with two-dimentional concrete designing requirement, the method to set up of two dimension concrete reinforcement electrode is: set n as reinforcing bar electrode sum, in concrete, same level Linear is laid and is parallel to each other and equidistant n root reinforcing bar electrode, is 1,2 by reinforcing bar electrode number consecutively, 3 ... n-2, n-1, n; Reinforcing bar electrode is made up of reinforcing bar (8) and cable-to-cable connector (9), reinforcing bar (8) and cable-to-cable connector (9) welding, reinforcing bar (8) requires in Transducers Embedded in Concrete according to Concrete Design, and it is outer for being connected to reinforcing bar electrode and multi-way switch stube cable (2) that cable-to-cable connector (9) exposes concrete.
5. as claimed in claim 1 based on the two-dimentional concrete health monitor method of reinforcing bar electrode, it is characterized in that: concrete parameters metering circuit is by 4 measurement interfaces (16-1 ~ 16-4), communication interface (24), concrete voltage amplifier (17), resistance (18), sinusoidal signal generator (19), resistive voltage amplifier (20), concrete electric pressing mold number converter (21), resistive voltage analog to digital converter (22) and microprocessor (23) are formed; Measurement interface is sorted successively into measurement interface 1, measurement interface 2, measurement interface 3, measurement interface 4; One end of measurement interface 4 is connected with sinusoidal signal generator (19), and the other end is connected with the measurement connector (15) of No. 4 multi-way switchs; One end of measurement interface 1 is connected with resistance (18), and the other end is connected with the measurement connector (15) of No. 1 multi-way switch; One end of measurement interface 3 is connected with the positive input of concrete voltage amplifier (17), and the other end is connected with the measurement connector (15) of No. 3 multi-way switchs; One end of measurement interface 2 is connected with the negative input of concrete voltage amplifier (17), and the other end is connected with the measurement connector (15) of No. 2 multi-way switchs; Series circuit is formed together with the output port of the concrete that measurement interface 4 is connected with measurement interface 1 and sinusoidal signal generator, resistance; Simulating signal, by after the voltage amplification between measurement interface 2 and measurement interface 3, is converted to digital signal through concrete electric pressing mold number converter (21) and gives microprocessor (23) by concrete voltage amplifier (17); Resistive voltage amplifier (20) amplifies the voltage at resistance two ends, through resistive voltage analog to digital converter (22), simulating signal is converted to digital signal and gives microprocessor; The frequency of Microprocessor S3C44B0X sinusoidal signal generator (19) and the gating of multi-way switch; Communication interface (24) communicates with data acquisition server for microprocessor, sends the instruction of data acquisition server to microprocessor, sends the data of microprocessor to data acquisition server.
6. as claimed in claim 1 based on the two-dimentional concrete health monitor method of reinforcing bar electrode, it is characterized in that: described to two interelectrode concrete parameters measuring processs of reinforcing bar in the middle of adjacent four reinforcing bar electrodes:
The first step under micro-processor control, select 4 adjacent reinforcing bar electrodes, in the face of 4 reinforcing bar electrodes, it is No. 1, No. 2, No. 3, No. 4 by reinforcing bar electrode number consecutively, combine respectively by the measurement interface 1 of No. 1 reinforcing bar Electrode connection to concrete parameters metering circuit by multi-way switch, No. 2 reinforcing bar Electrode connection are to the measurement interface 2 of concrete parameters metering circuit, No. 3 reinforcing bar Electrode connection are to measurement interface 3, No. 4 reinforcing bar Electrode connection of concrete parameters metering circuit to the measurement interface 4 of concrete parameters metering circuit;
Second step, microprocessor arrange the output frequency of sinusoidal signal generator, and are represented by output frequency f;
3rd step, the sample frequency arranging concrete electric pressing mold number converter and resistive voltage analog to digital converter are 100 times of f, gather the output data of concrete electric pressing mold number converter and resistive voltage analog to digital converter simultaneously, continuous acquisition data 100, by the data DH1 of concrete electric pressing mold number converter, DH2, DH3, DH98, DH99, DH100 represent; By the data DZ1 of resistive voltage analog to digital converter, DZ2, DZ3 ..., DZ98, DZ99, DZ100 represent;
4th step, calculating DH1, DH2, DH3 ..., the mean value of DH98, DH99, DH100, if mean value is Pdh, calculates DZ1, DZ2, DZ3 ..., the mean value of DZ98, DZ99, DZ100, if mean value is Pdz;
5th step, calculating CH1, CH2, CH3 ..., the value of CH98, CH99, CH100, wherein CH1=DH1-Pdh; CH2=DH2-Pdh; CH3=DH3-Pdh; CH98=DH98-Pdh; CH99=DH99-Pdh; CH100=DH100-Pdh;
6th step, calculating CZ1, CZ2, CZ3 ..., the value of CZ98, CZ99, CZ100, wherein CZ1=DZ1-Pdz; CZ2=DZ2-Pdz; CZ3=DZ3-Pdz; CZ98=DZ98-Pdz; CZ99=DZ99-Pdz; CZ100=DZ100-Pdz;
7th step, calculating CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100, and by CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100 is added, if CH1, CH2, CH3 ..., the absolute value of CH98, CH99, CH100 be added obtain and be Sch;
8th step, calculating CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100, and by CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100 is added, if CZ1, CZ2, CZ3 ..., the absolute value of CZ98, CZ99, CZ100 be added obtain and be Scz;
9th step, use Sch are divided by Scz, and the business obtained is called modulus of impedance, is designated as ZKM;
Tenth step, search CH1, CH2, CH3 ..., CH98, CH99, CH100 become the zero passage sequence number of successively decreasing of negative from positive number; The method of searching zero passage sequence number of successively decreasing is, if CHn is positive number or zero, CHn+1 is negative, then zero passage of successively decreasing sequence number is n, and zero passage of successively decreasing sequence number is recorded as JHn; Search CH1, CH2, CH3 ..., what CH98, CH99, CH100 became positive number from negative increases progressively zero passage sequence number; Searching the method increasing progressively zero passage sequence number is, if CHm is negative or zero, CHm+1 is positive number, then increasing progressively zero passage sequence number is m, will increase progressively zero passage sequence number and be recorded as JHm; If do not find JHn, then make JHn=JHm+50;
11 step, search CZ1, CZ2, CZ3 ... CZ98, CZ99, CZ100 become the zero passage sequence number of successively decreasing of negative from positive number, and the method for searching zero passage sequence number of successively decreasing is, if CZn is positive number or zero, CZn+1 is negative, then zero passage of successively decreasing sequence number is n, and zero passage of successively decreasing sequence number is recorded as JZn; Search CZ1, CZ2, CZ3 ... what CZ98, CZ99, CZ100 became positive number from negative increases progressively zero passage sequence number, and searching the method increasing progressively zero passage sequence number is, if CZm is negative or zero, CZm+1 is positive number, then increasing progressively zero passage sequence number is m, will increase progressively zero passage sequence number and be recorded as JZm; If do not find JZn, then make JZn=JZm+50;
If the value of the 12 step JHn – JZn is less than-25, then CHZ=100+JHn – JZn;
If the value of JHn – JZn is greater than 25, then CHZ=JHn – JZn-100;
If the value of JHn – JZn is between-25 to 25, then CHZ=JHn – JZn;
CHZ is called phase place.
7. as claimed in claim 1 based on the two-dimentional concrete health monitor method of reinforcing bar electrode, it is characterized in that: under described single-frequency, all parameter measurement steps of planar two dimension concrete are:
The first step, by No. 1 multi-way switch, by No. 1 reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by No. 2 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by No. 3 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by No. 4 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKM1, and the phase place of measurement is designated as CHZ1;
Second step, by No. 1 multi-way switch, by No. 2 reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by No. 3 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by No. 4 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by No. 5 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKM2, and the phase place of measurement is designated as CHZ2;
3rd step, by No. 1 multi-way switch, by i reinforcing bar Electrode connection to measurement interface 1, by No. 2 multi-way switchs, by i+1 reinforcing bar Electrode connection to measurement interface 2, by No. 3 multi-way switchs, by i+2 reinforcing bar Electrode connection to measurement interface 3, by No. 4 multi-way switchs, by i+3 reinforcing bar Electrode connection to measurement interface 4; According to concrete parameters measuring process, measurement impedance mould and phase place; The modulus of impedance of measurement is designated as ZKMi, and it is the integer being greater than 2 and being less than or equal to n-3 that the phase place of measurement is designated as CHZi.i.
8. as claimed in claim 1 based on the two-dimentional concrete health monitor method of reinforcing bar electrode, it is characterized in that: under described multiple typical frequencies, between planar two dimension concrete all adjacent reinforcing bar electrodes, the step of parameter measurement is:
The first step, data acquisition server select several typical survey frequency, if typical measured frequency is f1, f2 ... fk, sends to microprocessor by typical measured frequency by communication interface;
Second step, method according to planar two dimension concrete all parameter measurement steps under single-frequency, for frequency f 1, f2, fk, measure the modulus of impedance ZKMi that the normal two dimension of same specification is concrete respectively, phase place CHZi, wherein i is the integer being more than or equal to 1 and being less than or equal to n-3, and by transmitting measured values to data acquisition server; By data acquisition server by frequency f 1, f2 ... fk records normal two-dimentional concrete modulus of impedance ZKMi, phase place CHZi respectively, and wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3;
3rd step, under purpose monitoring state, for frequency f 1, f2, fk, measures the concrete modulus of impedance ZKMi of monitored two dimension, phase place CHZi respectively in real time, wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3, and by transmitting measured values to data acquisition server;
4th step, data acquisition server are for frequency f 1, f2, under fk compares same frequency respectively, the difference of monitored two dimension concrete modulus of impedance ZKMi, phase place CHZi and normal two-dimentional concrete modulus of impedance ZKMi, phase place CHZi, as larger in there is data deviation ratio, then judge that monitored concrete is abnormal, and abnormity point is between i+1 electrode to i+2 electrode; Wherein, i is the integer being more than or equal to 1 and being less than or equal to n-3.
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