CN107014987B - Rectangular section self-induction intelligent multi-input-output concrete member health monitoring method - Google Patents
Rectangular section self-induction intelligent multi-input-output concrete member health monitoring method Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 54
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- 239000011150 reinforced concrete Substances 0.000 claims abstract description 54
- 238000013461 design Methods 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims abstract description 7
- 238000004364 calculation method Methods 0.000 claims description 26
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- 238000004519 manufacturing process Methods 0.000 abstract description 3
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- FWZLYKYJQSQEPN-UHFFFAOYSA-N peregrine Natural products OC1C2C3C4(C5C6OC(C)=O)C(OC)CCC5(C)CN(CC)C4C6C2(OC)CC(OC)C1C3 FWZLYKYJQSQEPN-UHFFFAOYSA-N 0.000 description 2
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention discloses a health monitoring method for a rectangular section self-induction intelligent multi-input-output concrete member. Health monitoring is accomplished by measuring equipment that is connected to sensors of rectangular section concrete members. The sensors are divided into an external sensor and an internal sensor, and the number of the sensors is determined by experiments. The measuring device is connected to the measured reinforced concrete member sensor by a sensor connection line. The measuring equipment comprises a control server, a communication interface, a microprocessor, a power divider, a program-controlled attenuator, a signal source, a reverse signal isolator, a signal analyzer, an S-switch and a switch circuit, and the measuring task is completed under the control of a program. The method is used for manufacturing the self-induction intelligent multiple-input-output sensor according to the existing concrete member design specification, and the number of the sensors is designed according to the experimental result. The method is convenient for real-time on-line detection and monitoring of the health condition of the concrete member, and simultaneously provides a concrete health monitoring and testing instrument.
Description
Technical Field
The invention belongs to building material detection, relates to concrete quality test, and in particular relates to a rectangular section self-induction intelligent multi-input-output concrete member health monitoring method.
Background
The concrete is an important engineering material widely used for house construction, bridge engineering, hydraulic engineering and the like, and the concrete health detection and monitoring instrument is a technical means for ensuring the safe and long-term operation of the concrete. The prediction, forecast and diagnosis of concrete health are one of the main problems that are urgently needed to be overcome in the world today. Regular or real-time health detection and monitoring is required for highways, bridges, dams and other civil constructions. However, the existing concrete quality detection means cannot completely meet the requirements of construction development. With the advancement of technology, the quality problem of concrete is becoming more and more important nowadays, and the quality detection of concrete is being developed and improved.
The patent number ZL201620784210.9 'dielectric constant measuring equipment for intelligent coaxial one-dimensional reinforced concrete member' can monitor the dielectric constant of reinforced concrete in real time, and monitor the health condition of each stage of concrete according to the change of the dielectric constant of the concrete. Patent No. ZL201620782788.0, "equivalent circuit-based one-dimensional coaxial reinforced concrete member measuring equipment", uses the concrete material itself as a sensing material, and measures the health condition of the concrete by measuring a one-dimensional coaxial reinforced concrete equivalent circuit model.
Patent No. ZL201520402418.5 "step tester for one-dimensional concrete health monitoring of reinforced coaxial cable structure" is based on a reinforced coaxial cable model with an inner conductor and an outer conductor, and the inner conductor and the outer conductor are connected to a testing interface of a detecting instrument for testing. When the step tester is used, the inner conductor and the outer conductor at one end of the concrete are connected to the testing interface of the step tester, and the test is performed by a method of reflecting signal time delay. When the vector network analyzer is used, a port of the vector network analyzer is connected to an outer conductor and an inner conductor at one end of the tested concrete, and the test is performed by using a time domain S parameter method. However, the use of a step tester only allows large concrete to be measured, and the use of a vector network analyzer is disadvantageous for real-time on-line monitoring. New techniques are also needed to improve concrete quality detection based on these prior art deficiencies.
Disclosure of Invention
The invention aims to provide a rectangular-section self-induction intelligent multi-input-output concrete member health monitoring method aiming at the problem that the current concrete member cannot be monitored in real time, so as to realize real-time monitoring.
The aim of the invention is achieved in that: a health monitoring method of a rectangular section self-induction intelligent multi-input-output concrete member is characterized by comprising the following steps of: the health monitoring of the concrete member is accomplished by a measuring device connected to a sensor of the rectangular section concrete member.
According to different sensor positions, the sensors on the rectangular section concrete member are divided into an external sensor and an internal sensor, and the measuring equipment is connected to the measured rectangular section self-induction intelligent multi-input-output reinforced concrete member sensor through a sensing connecting wire. The connector of each sensor is connected with one end of a sensing connecting wire, and the other end of the sensing connecting wire is connected to measuring equipment; the measuring equipment consists of a control server, a communication interface, a microprocessor, a power divider, a program-controlled attenuator, a signal source, a reverse signal isolator, a signal analyzer, an S-type switch and a switch circuit.
The setting of external sensor is: the design method of the longitudinal bars and the stirrups is the same as the design method of the existing one-dimensional reinforced concrete member, conforms to the existing design specification, and part of stirrups are replaced by external sensors on the basis of the existing one-dimensional reinforced concrete member. Every interval I stirrups set up an external sensor, I is confirmed by the experiment, and external sensor sets up k altogether, and external sensor has the sensing function except that, still has the stirrup function concurrently.
The built-in sensor is provided with: the design method of the longitudinal bars and the stirrups is the same as the design method of the existing one-dimensional reinforced concrete member, the existing design specification is complied, on the basis of the existing one-dimensional reinforced concrete member, the built-in sensors are added, the built-in sensors cannot replace the stirrups, the built-in sensors are clung to and bound in the longitudinal bars, p built-in sensors are uniformly arranged in the one-dimensional reinforced concrete member, and the value of p is determined by experiments.
The measuring equipment is provided with more than S switch circuits in total, wherein the S switch circuits are used for measuring, S=k and k are the number of external sensors for the self-induction intelligent multi-input-output reinforced concrete member with the external rectangular section of the sensor, and S=p and p are the number of internal sensors for the self-induction intelligent multi-input-output reinforced concrete member with the internal rectangular section of the sensor;
the external sensor material is composed of a layer of insulating layer wrapped outside a reinforcing steel bar, the selection of the reinforcing steel bar is the same as that of a hooping selection method, the external sensor material is wrapped and bound outside a longitudinal bar according to the existing hooping design specification, the wrapping method and the binding method are in compliance with the existing hooping design specification, hooks are arranged at two ends of the external sensor material, the hooks at the two ends are wrapped around the longitudinal bar at the hooks, a connector connecting wire is a coaxial cable, the reinforcing steel bars at the hooks at the two ends are respectively connected with an outer conductor and an inner conductor of the connector connecting wire, and the connector connecting wire is connected with the connector.
The built-in sensor material is the same as the external sensor material, and is formed by wrapping a layer of insulating layer by the reinforcing steel bars, the selection of the reinforcing steel bars is the same as the selection method of stirrups, the built-in sensor material surrounds and is bound in the longitudinal ribs according to the design specification requirement of the existing stirrups, the connector connecting wires are coaxial cables, the reinforcing steel bars at two ends are respectively connected with the outer conductors and the inner conductors of the connector connecting wires, and the connector connecting wires are connected with the connectors.
The control server of the measuring equipment is connected with the microprocessor through a communication interface, sends a control command to the microprocessor, and receives the calculation data of the microprocessor; the microprocessor is connected with the program-controlled attenuator, the signal source, the reverse signal isolator, the signal analyzer, the S-switch and the switch circuit, controls the running state of each connecting circuit and reads data from the signal analyzer;
the signal source 16 is connected with the power divider 1 and the microprocessor, generates a signal under the control of the microprocessor, and transmits the signal to the power divider 1;
the power divider 1 is connected with a signal source, a reverse signal isolator, a program-controlled attenuator A and a program-controlled attenuator B, the signal source generates a test signal and outputs the test signal to the power divider 1, and the power divider 1 divides the signal generated by the signal source into 3 paths and respectively transmits the signals to the reverse signal isolator, the program-controlled attenuator A and the program-controlled attenuator B;
the program-controlled attenuator B is connected with the microprocessor, the power divider 1 and the power divider 2, and is controlled by the microprocessor, one path of signals of the power divider 1 are transmitted to the input signal end of the program-controlled attenuator B, and the output signals of the program-controlled attenuator B are transmitted to the power divider 2;
the power divider 2 is connected with the program-controlled attenuator B, the signal analyzer 1 and the signal analyzer 2, divides the signal of the program-controlled attenuator B into two paths and respectively transmits the signals to the signal analyzer 1 and the signal analyzer 2;
the program-controlled attenuator A is connected with the microprocessor, the power divider 1 and the signal analyzer 1, and is controlled by the microprocessor, one path of signals of the power divider 1 are transmitted to the input signal end of the program-controlled attenuator A, and the output signals of the program-controlled attenuator A are transmitted to the signal analyzer 1;
the reverse signal isolator is connected with the microprocessor and the power divider 1 and the S-selection switch B, and is controlled by the microprocessor, one path of signals of the power divider 1 are transmitted to the reverse signal isolator, and output signals of the reverse signal isolator are transmitted to the S-selection switch B;
the signal analyzer 1 is connected with the microprocessor, the power divider 2 and the program-controlled attenuator A, receives the control of the microprocessor, sends the analysis result to the microprocessor, and receives the output signals of the power divider 2 and the program-controlled attenuator A;
the signal analyzer 2 is connected with the microprocessor and one of the switches A selected by the power divider 2 and S, receives the control of the microprocessor, sends the analysis result to the microprocessor, and receives the output signals of the one of the switches A selected by the power divider 2 and S;
and the S-selection switch B is connected with the microprocessor, the reverse signal isolator and all the switch circuits, receives the control of the microprocessor, firstly selects one switch circuit each time under the control of the microprocessor, and transmits the output signal of the reverse signal isolator to the selected switch circuit.
The S-selection switch A is connected with the microprocessor, the signal analyzer 2 and all the switch circuits, receives the control of the microprocessor, selects one of the switch circuits at a time under the control of the microprocessor, and inputs the signals of the selected switch circuit to the signal analyzer 2.
Each switch circuit is connected with a microprocessor and a switch B selected by a switch A, S selected by an S, and is connected with a sensor of the rectangular section self-induction intelligent multi-input-output reinforced concrete member, and the switch circuits select working or non-working modes under the control of the microprocessor; in the inactive mode, the sensor is disconnected from the interface connected to the S-select switch a and the S-select switch B. In the working mode, the sensor is connected with one of interfaces connected with the S-switch A or the S-switch B; only two switch circuits work at a time, one switch connects the sensor to the S-select switch A, and the other switch connects the sensor to the S-select switch B; when the measuring equipment works, one sensor is selected to be connected to the analyzer 2 and the other sensor is selected to be connected to the reverse signal isolator through the control of the microprocessor on the switch circuit, the switch A selected by S and the switch B selected by S.
The program flow of the method comprises a control server program flow, a rectangular section self-induction intelligent multi-input-output reinforced concrete member health condition calculating subprogram and a microprocessor program;
the control server program flow is:
the first step: setting a DATA range of a real part Rd and an imaginary part Id of the induction parameter DATA between each pair of sensors in a health state; entering a second step;
and a second step of: sending a command for setting system parameters to a microprocessor through a communication interface, wherein the sent system parameters comprise: the signal source frequency, the amplification factors of the reverse isolator, the program-controlled attenuator A and the program-controlled attenuator B, and the working modes of the signal analyzer 1 and the signal analyzer 2; setting the amplification factor of the reverse isolator as KF, the amplification factor of the program-controlled attenuator A as KCa, the amplification factor of the program-controlled attenuator B as KCb, and entering a third step;
and a third step of: receiving a real part Rd and an imaginary part Id of the induction parameter DATA calculated by the microprocessor through a communication interface, and entering a fourth step;
fourth step: and (3) running a health condition calculation subroutine of the rectangular section self-induction intelligent multi-input-output reinforced concrete member, and returning to the second step.
The health condition calculation subroutine of the rectangular section self-induction intelligent multi-input-output reinforced concrete member is as follows:
the first step: judging whether the real part Rd and the imaginary part Id of the sensing parameter DATA between the pair of sensors belong to a DATA range in a health state or not, if so, entering a second step; if not, entering a third step;
and a second step of: the self-induction intelligent multi-input-output reinforced concrete member with the rectangular cross section is considered to be in a healthy state, and the fourth step is carried out;
and a third step of: the self-induction intelligent multi-input-output reinforced concrete member with the rectangular cross section is considered to be in an unhealthy state, and the fourth step is carried out;
fourth step: returning to the main program.
The microprocessor program includes a microprocessor main program and a parameter calculation subroutine,
the main program of the microprocessor is:
the first step: receiving a command of a control server through a communication interface, and turning to a second step;
and a second step of: setting system parameters, wherein the set system parameters comprise: the working modes of the signal source frequency, the reverse isolator, the program-controlled attenuator A and the program-controlled attenuator B, the signal analyzer 1 and the signal analyzer 2 are switched to the third step;
and a third step of: let i=1, j=1; turning to a fourth step;
fourth step: judging whether i is equal to j, if not, turning to a fifth step; if yes, go to the eighth step;
s, selecting a switch B to switch on a switch circuit i, so that an output signal of the reverse signal isolator is connected to a sensor connected with the switch circuit i; s, a switch A is selected to switch on a switch circuit j, so that a sensor connected with the switch circuit j is connected with a signal analyzer 2, and the sixth step is carried out;
step six, receiving an in-phase component I and a quadrature component Q between the program-controlled attenuator A obtained by analysis of the signal analyzer 1 and the output signal of the power divider 2, and setting the in-phase component obtained by analysis of the signal analyzer 1 as DATA_I1 and the quadrature component as DATA_Q1; the method comprises the steps that an in-phase component I and a quadrature component Q between a sensor connected with a switching circuit j and an output signal of a power divider 2 are obtained through analysis by a receiving signal analyzer 2, the in-phase component obtained through analysis by the signal analyzer 2 is set as DATA_I2, the quadrature component is set as DATA_Q2, and the seventh step is carried out;
seventh step: calling a parameter calculation subroutine, and turning to an eighth step;
eighth step: let j=j+1; turning to a ninth step; ninth step: judging whether j is greater than S, if not, turning to a fourth step; if yes, turning to a tenth step;
tenth step: let j=1, i=i+1: turning to an eleventh step; eleventh step: judging whether i is greater than S; if not, turning to a fourth step; if yes, go to the twelfth step;
twelfth step: the parameter calculation result is sent to a control server, and the first step is carried out;
the parameter calculation subroutine is:
the first step: the sensing parameter DATA is calculated as follows:
the parameter DATA is complex, the real part of DATA is denoted by Rd, the imaginary part of DATA is denoted by Id, and the calculated DATA is the sensing parameter between the sensor i and the sensor j selected when the parameter calculation subroutine is called.
And a second step of: returning to the main program of the microprocessor.
The invention has the positive effects that:
aiming at the defect that the concrete member cannot be monitored in real time, the intelligent multi-input-output concrete member health monitoring method based on the rectangular cross section self-induction is provided. The method skillfully utilizes the stirrup manufacturing method of the concrete member to finish the manufacturing of the sensor on the basis of conforming to the design specification of the existing concrete member. The self-induction intelligent multi-input and output method is designed by adopting the material of the concrete member, and the number of the sensors can be designed according to the measurement requirement of the concrete member. The service life of the sensor designed by the method is equal to that of a concrete member, so that the one-dimensional concrete health condition of the rectangular section can be conveniently detected on line in real time, the one-dimensional concrete health condition of the rectangular section can be monitored, and concrete lesions can be timely found out and pre-warned. Meanwhile, a testing instrument is provided for monitoring the health of the one-dimensional concrete with the rectangular cross section.
Drawings
Fig. 1 is a one-dimensional reinforced concrete design structure diagram with an external sensor and a rectangular cross section.
Fig. 2 is a structural diagram of an external sensor.
Fig. 3 is a cross-sectional view of an external sensor.
Fig. 4 is a structural diagram of a one-dimensional reinforced concrete design with a built-in sensor and a rectangular cross section.
Fig. 5 is a structural diagram of the built-in sensor.
Fig. 6 is a structural diagram of the measuring apparatus.
Fig. 7 is a control server program flow.
Fig. 8 is a subroutine diagram of the health calculation of a rectangular section self-induction intelligent multi-input-output reinforced concrete member.
Fig. 9 is a main program diagram of a microprocessor.
Fig. 10 is a signal source circuit diagram.
FIG. 11 is a circuit diagram of a reverse signal isolator of a measurement apparatus.
FIG. 12 is a circuit diagram of a programmable attenuator of a measuring device
Fig. 13 to 14 are circuit diagrams of a signal analyzer of the measuring apparatus.
In the figure, a 1-k external sensor, a 2-hook longitudinal bar, a 3-1-3-m longitudinal bar, a 4-1-4-n stirrup, a 5-1-5-2 hook, a 6 connector, a 7 connector connecting wire, an 8 steel bar, a 9 insulating layer, a 10-1-10-p built-in sensor, an 11 control server, a 12 communication interface, a 13 microprocessor, 14-1, 14-2 power splitters, a 15-1 program controlled attenuator A, a 15-2 program controlled attenuator B, a 16 signal source, a 17 reverse signal isolator, an 18-1 signal analyzer 1, an 18-2 signal analyzer 2, a 19-1S switch A, a 19-2S switch B, a 20-1-20-S switch circuit, a 21 sensor, a 22 rectangular section self-induction intelligent multi-input-output reinforced concrete member and 23 measuring equipment.
Detailed Description
The health monitoring of the concrete member is accomplished by a measuring device connected to a sensor of the rectangular section concrete member. The sensors on the rectangular section concrete member are divided into an external sensor and an internal sensor according to the positions of the transmitting sensor and the receiving sensor.
See fig. 1-3. When the external sensor is adopted, the design method of the one-dimensional reinforced concrete longitudinal bars and the stirrups with rectangular cross sections is the same as the existing one-dimensional reinforced concrete design method, and conforms to the existing design specifications. Based on the existing one-dimensional reinforced concrete, part of stirrups are replaced by external sensors. An external sensor is arranged at each interval I of stirrups, the external sensor replaces the function borne by the stirrups, I is determined by experiments, and k external sensors are arranged. The external sensor has the sensing function and the stirrup function. The structure forms the sensor external rectangular section self-induction intelligent multi-input-output reinforced concrete member.
The external sensor material is formed by wrapping a layer of insulating layer on the reinforcing steel bars. The selection of the reinforcing steel bars is the same as the selection method of the stirrups, and conforms to the design specification requirements of the existing stirrups. The external sensor material is surrounded and bound outside the longitudinal bars, and the surrounding method and the binding method conform to the design specification requirements of the existing stirrups. Hooks are arranged at two ends of the external sensor material, the hooks 5 at the two ends are wound around longitudinal ribs at the hooks, the connector connecting wire 7 is a coaxial cable, and the reinforcing bars at the hooks at the two ends are respectively connected with an outer conductor and an inner conductor of the connector connecting wire. The connector connection wire 7 is connected to the connector 6.
See fig. 4 and 5. When the built-in sensor is adopted, the design method of the longitudinal bars and the stirrups is the same as the existing one-dimensional reinforced concrete design method, and conforms to the existing design specification. On the basis of the existing one-dimensional reinforced concrete, a built-in sensor is added. The built-in sensor cannot replace the stirrup function. The built-in sensors are tightly attached and bound in the longitudinal ribs, p sensors are uniformly arranged in the one-dimensional reinforced concrete, and the value of p is determined by experiments. The structure forms the built-in sensor rectangular section self-induction intelligent multi-input-output reinforced concrete member.
The material of the built-in sensor is the same as that of the external sensor, and the built-in sensor is formed by wrapping a layer of insulating layer outside the steel bar. The selection of the reinforcing steel bars is the same as the selection method of the stirrups, and conforms to the design specification requirements of the existing stirrups. The built-in sensor material surrounds and is bound inside the longitudinal ribs. The connector connecting wire 7 is a coaxial cable, and the reinforcing steel bars at two ends are respectively connected with the outer conductor and the inner conductor of the connector connecting wire 7. The connector connection wire 7 is connected to the connector.
See fig. 6. The measuring equipment is connected to the measured rectangular section self-induction intelligent multi-input-output reinforced concrete member sensor through the sensor connecting cable. The connector of each sensor is connected with one end of a sensor connecting wire, and the other end of the sensor connecting wire is connected to measuring equipment. The sensor connection wire selects a coaxial cable.
The sensor of the rectangular section self-induction intelligent multi-input-output reinforced concrete member is characterized in that a connector of the built-in sensor or the built-out sensor is connected with one end of a sensor connecting wire, and the other end of the sensor connecting wire is connected to a switch circuit of the measuring equipment. The measuring device has more than S switch circuits in total, wherein the S switch circuits are used for measuring, S=k for the sensor-external rectangular section self-induction intelligent multi-input-output reinforced concrete member, and S=p for the sensor-internal rectangular section self-induction intelligent multi-input-output reinforced concrete member.
The measuring equipment consists of a control server 11, a communication interface 12, a microprocessor 13, power dividers 14-1 and 14-2, a program-controlled attenuator A15-1, a program-controlled attenuator B15-2, a signal source 16, a reverse signal isolator 17, a signal analyzer 1-1, a signal analyzer 2 18-2, an S-switch A19-1, an S-switch B19-2 and a switching circuit 20-1-20-S.
The control server 11 is connected with the microprocessor through a communication interface, sends control commands to the microprocessor, and receives the microprocessor calculation data. The microprocessor is connected with the program-controlled attenuator A, the program-controlled attenuator B1, the signal source, the reverse signal isolator 17, the signal analyzer 1-1, the signal analyzer 2 18-2, the S-switch A19-1, the S-switch B19-2 and the switch circuits 20-1-20-S, controls the running states of the connecting circuits and reads data from the signal analyzer.
The signal source 16 is connected with the power divider 1-1 and the microprocessor 13, generates a signal under the control of the microprocessor, and transmits the signal to the power divider 1.
The power divider 1-1 is connected with a signal source 16, a reverse signal isolator 17, a program-controlled attenuator A15-1 and a program-controlled attenuator B15-2. The signal source generates a test signal and outputs the test signal to the power divider 1, and the power divider 1 divides the signal generated by the signal source into 3 paths and respectively transmits the signals to the reverse signal isolator, the program-controlled attenuator A and the program-controlled attenuator B.
The program-controlled attenuator B is connected with the microprocessor, the power divider 1 and the power divider 2, and is controlled by the microprocessor, one path of signals of the power divider 1 are transmitted to the input signal end of the program-controlled attenuator B, and the output signal of the program-controlled attenuator B is transmitted to the power divider 2.
The power divider 2 is connected with the program-controlled attenuator B, the signal analyzer 1 and the signal analyzer 2. The signal of the program controlled attenuator B is divided into two paths, and the two paths are respectively transmitted to the signal analyzer 1 and the signal analyzer 2.
The program-controlled attenuator A is connected with the microprocessor, the power divider 1 and the signal analyzer 1, and is controlled by the microprocessor, one path of signals of the power divider 1 are transmitted to the input signal end of the program-controlled attenuator A, and the output signals of the program-controlled attenuator A are transmitted to the signal analyzer 1.
The reverse signal isolator is connected with the microprocessor and the power divider 1 and the S-selecting switch B, and is controlled by the microprocessor, one path of signals of the power divider 1 are transmitted to the reverse signal isolator, and output signals of the reverse signal isolator are transmitted to the S-selecting switch B.
The signal analyzer 1 is connected with the microprocessor, the power divider 2 and the program-controlled attenuator A, receives the control of the microprocessor, sends the analysis result to the microprocessor, and receives the output signals of the power divider 2 and the program-controlled attenuator.
The signal analyzer 1 is connected with the microprocessor and one of the switches A selected by the power divider 2 and S, receives the control of the microprocessor, sends the analysis result to the microprocessor, and receives the output signals of the one of the switches A selected by the power divider 2 and S.
And the S-selection switch B is connected with the microprocessor, the reverse signal isolator and all the switch circuits, receives the control of the microprocessor, firstly selects one switch circuit each time under the control of the microprocessor, and transmits the output signal of the reverse signal isolator to the selected switch circuit.
The S-selection switch A is connected with the microprocessor, the signal analyzer 2 and all the switch circuits, receives the control of the microprocessor, selects one of the switch circuits at a time under the control of the microprocessor, and inputs the signals of the selected switch circuit to the signal analyzer 2.
Each switch circuit is connected with a microprocessor, a switch A, S and a switch B, and each switch circuit is connected with a sensor of the rectangular section self-induction intelligent multi-input-output reinforced concrete member. The switching circuit selects the active or inactive mode under the control of the microprocessor. In the inactive mode, the sensor is disconnected from the interface connected to the S-select switch a and the S-select switch B. In the working mode, the sensor is connected with one of interfaces connected with the S-switch A or the S-switch B. Only two switching circuits are active at a time, one of which connects the sensor to the S-select switch a and the other of which connects the sensor to the S-select switch B. When the measuring equipment works, one sensor is selected to be connected to the analyzer 2 and the other sensor is selected to be connected to the reverse signal isolator through the control of the microprocessor on the switch circuit, the switch A selected by S and the switch B selected by S.
In this example, the microprocessor of the controller developed a board using ZC706 manufactured by XILINX, USA. The communication interface is a serial interface of the ZC 706.
See fig. 10. In the present controller signal source, US1 is ADF4350, manufactured by ANALOG DEVICES, U.S. Pat. No. 2 is a 26MHZ active crystal oscillator, and US3 is ADF4153, manufactured by ANALOG DEVICES, U.S. Pat. No. 3. CLKA, DATAA, LEA, CLKB, DATAB, LEB, MUXS, MUXO, LD to the IO pin RFOUTA of ZC706 to the input of the power divider.
The power divider 1 and the power divider 2 adopt the same model Shanghai Hua Xiang SHX-GF2-100 of computer communication engineering Co., ltd.
Referring to fig. 11, reverse signal isolation. In the drawing the view of the figure,
UA1, UA3: integrated circuit, model: NBB-400, manufactured by RF Micro Devices, inc., USA.
UA2: integrated circuit, model: PE43704, produced by Peregrine Semiconductor Corp, inc.
GLIN: and the output of the power divider is connected. GLOUT: the directional coupler input is connected.
A0, A1, A2, D0, D1, D2, D3, D4, D5, D6, SI, CLK, LE, P/S are connected to IO pins of ZC 706.
The controller of the invention adopts a switch A for S and a switch B for S, which are all made of Dow-Key Microwave products in the United states, and the model is: 3203-8X8-ENET. The switch circuit is SHX801-01 of Shanghai Hua Xiang computer communication engineering Co.
Referring to fig. 12, the same circuit is used for the programmable attenuator a and the programmable attenuator B. In the figure, UD6: integrated circuit, model: PE43704, produced by Peregrine Semiconductor Corp, inc.
A0, A1, A2, D0, D1, D2, D3, D4, D5, D6, SI, CLK, LE, P/S are connected to IO pins of ZC 706.
See fig. 13-14.AD9361 acts as a two-way signal parser. The signal analyzer 1 and the signal analyzer 2 employ one chip.
UR1: AD9361 produced by Analog Devices, inc. of the United states.
UR2, UR3: TCM1-63AX+ manufactured by Mini-Circuits Inc. of U.S.A.
JP1, JP2, JP3: BNC connector.
The connection networks named AUXADC, AUXDAC1, AUXDAC2, RX_F_N, RX_F_P, TX_F_N, TX_F_P, SPIDO, SPIDI, SPICLK, SPIEN, CLKOUT, RESETB, EN, ENAGC, F_CLK_N, F_CLK_P, D_CLK_N, D_CLK_P, TXNRX, P0_D [0:11], P1_D [0:11], GPIO [0:3], CTLIN [0:3], CTRLOUT [0:7] are all connected to IO pins of ZC 706.
The control server uses a general desktop or notebook computer.
The program flow of the control server comprises a program flow of the control server, a rectangular section self-induction intelligent multi-input-output reinforced concrete member health condition calculation subprogram and a microprocessor program;
the control server program flow is:
the first step: setting a DATA range of a real part Rd and an imaginary part Id of the induction parameter DATA between each pair of sensors in a health state; entering a second step;
and a second step of: sending a command for setting system parameters to a microprocessor through a communication interface, wherein the sent system parameters comprise: the signal source frequency, the amplification factors of the reverse isolator, the program-controlled attenuator A and the program-controlled attenuator B, and the working modes of the signal analyzer 1 and the signal analyzer 2; setting the amplification factor of the reverse isolator as KF, the amplification factor of the program-controlled attenuator A as KCa, the amplification factor of the program-controlled attenuator B as KCb, and entering a third step;
and a third step of: receiving a real part Rd and an imaginary part Id of the induction parameter DATA calculated by the microprocessor through a communication interface, and entering a fourth step;
fourth step: and (3) running a health condition calculation subroutine of the rectangular section self-induction intelligent multi-input-output reinforced concrete member, and returning to the second step.
The health condition calculation subroutine of the rectangular section self-induction intelligent multi-input-output reinforced concrete member is as follows:
the first step: judging whether the real part Rd and the imaginary part Id of the sensing parameter DATA between the pair of sensors belong to a DATA range in a health state or not, if so, entering a second step; if not, entering a third step;
and a second step of: the self-induction intelligent multi-input-output reinforced concrete member with the rectangular cross section is considered to be in a healthy state, and the fourth step is carried out;
and a third step of: the self-induction intelligent multi-input-output reinforced concrete member with the rectangular cross section is considered to be in an unhealthy state, and the fourth step is carried out;
fourth step: returning to the main program.
The microprocessor program comprises a microprocessor main program and a parameter calculation subprogram;
the main program of the microprocessor is:
the first step: receiving a command of a control server through a communication interface, and turning to a second step;
and a second step of: setting system parameters, wherein the set system parameters comprise: the working modes of the signal source frequency, the reverse isolator, the program-controlled attenuator A and the program-controlled attenuator B, the signal analyzer 1 and the signal analyzer 2 are switched to the third step;
and a third step of: let i=1, j=1; turning to a fourth step;
fourth step: judging whether i is equal to j, if not, turning to a fifth step; if yes, go to the eighth step;
s, selecting a switch B to switch on a switch circuit i, so that an output signal of the reverse signal isolator is connected to a sensor connected with the switch circuit i; s, a switch A is selected to switch on a switch circuit j, so that a sensor connected with the switch circuit j is connected with a signal analyzer 2, and the sixth step is carried out;
step six, receiving an in-phase component I and a quadrature component Q between the program-controlled attenuator A obtained by analysis of the signal analyzer 1 and the output signal of the power divider 2, and setting the in-phase component obtained by analysis of the signal analyzer 1 as DATA_I1 and the quadrature component as DATA_Q1; the method comprises the steps that an in-phase component I and a quadrature component Q between a sensor connected with a switch circuit j and obtained through analysis by a receiving signal analyzer 2 and an output signal of a power divider 2 are set, the in-phase component obtained through analysis by the signal analyzer 2 is DATA_I2, the quadrature component is DATA_Q2, and the seventh step is carried out;
seventh step: calling a parameter calculation subroutine, and turning to an eighth step;
eighth step: let j=j+1; turning to a ninth step;
ninth step: judging whether j is greater than S, if not, turning to a fourth step; if yes, turning to a tenth step;
tenth step: let j=1, i=i+1: turning to an eleventh step;
eleventh step: judging whether i is greater than S; if not, turning to a fourth step; if yes, go to the twelfth step;
twelfth step: and (3) sending the parameter calculation result to a control server, and turning to the first step.
The parameter calculation subroutine is:
the first step: the sensing parameter DATA is calculated as follows:
the parameter DATA is complex, the real part of DATA is denoted by Rd, the imaginary part of DATA is denoted by Id, and the calculated DATA is the sensing parameter between the sensor i and the sensor j selected when the parameter calculation subroutine is called.
And a second step of: returning to the main program of the microprocessor.
Claims (6)
1. A health monitoring method of a rectangular section self-induction intelligent multi-input-output concrete member is characterized by comprising the following steps of: the health monitoring of the concrete member is completed by measuring equipment which is connected to a sensor of the concrete member with the rectangular cross section; according to different positions of the sensors, the sensors on the rectangular-section concrete member are divided into an external sensor and an internal sensor, and the measuring equipment is connected to the measured rectangular-section self-induction intelligent multi-input-output reinforced concrete member sensor through a sensing connecting wire; the connector of each sensor is connected with one end of a sensing connecting wire, and the other end of the sensing connecting wire is connected to measuring equipment; the measuring equipment consists of a control server (11), a communication interface (12), a microprocessor (13), a power divider 1 (14-1), a power divider 2 (14-2), a program-controlled attenuator A (15-1), a program-controlled attenuator B (15-2), a signal source (16), a reverse signal isolator (17), a signal analyzer 1 (18-1), a signal analyzer 2 (18-2), an S-switch A (19-1), an S-switch B (19-2), a switching circuit 1 (20-1), a switching circuit 2 (20-2) and a … switching circuit S (20-S);
the external sensor is based on the existing one-dimensional reinforced concrete member, part of stirrups are replaced by the external sensor, one external sensor is arranged at each interval I of stirrups, I is determined by experiments, k external sensors are arranged, and the external sensor has the functions of the stirrups besides the sensing function;
the setting method of the built-in sensor comprises the following steps: the design method of the longitudinal bars and the stirrups is the same as the design method of the existing one-dimensional reinforced concrete member, the existing design specification is complied, on the basis of the existing one-dimensional reinforced concrete, the built-in sensors are added, the built-in sensors cannot replace the stirrups, the built-in sensors are clung and bound in the longitudinal bars, p built-in sensors are uniformly arranged in the one-dimensional reinforced concrete, and the value of p is determined by experiments;
the measuring equipment is provided with more than S switch circuits in total, wherein the S switch circuits are used for measuring, S=k and k are the number of external sensors for the self-induction intelligent multi-input-output reinforced concrete member with the external rectangular section of the sensor, and S=p and p are the number of internal sensors for the self-induction intelligent multi-input-output reinforced concrete member with the internal rectangular section of the sensor.
2. The method for monitoring the health of a concrete member according to claim 1, wherein: the external sensor material is formed by wrapping a layer of insulating layer outside a steel bar, the selection of the steel bar is the same as that of a stirrup selection method, the external sensor material is wrapped and bound outside a longitudinal bar (3) according to the design specification requirement of the existing stirrup (4), hooks (5) are arranged at two ends of the external sensor material, the hooks at two ends are wound around the longitudinal bar (2) at the hooks, a connector connecting wire (7) is a coaxial cable, the steel bars at the hooks at two ends are respectively connected with an outer conductor and an inner conductor of the connector connecting wire, and the connector connecting wire (7) is connected with a connector (6);
the built-in sensor material is the same as the external sensor material, and is formed by wrapping an insulating layer (9) outside a reinforcing steel bar (8), the selection of the reinforcing steel bar (8) is the same as the selection method of a stirrup (4), the built-in sensor material surrounds and is bound in a longitudinal bar (3) according to the design specification requirement of the existing stirrup, a connector connecting wire (7) is a coaxial cable, the reinforcing steel bars (8) at two ends are respectively connected with an outer conductor and an inner conductor of the connector connecting wire, and the connector connecting wire (7) is connected with a connector (6).
3. The method for monitoring the health of a concrete member according to claim 1, wherein:
the control server (11) of the measuring equipment is connected with the microprocessor (13) through the communication interface (12), sends a control command to the microprocessor and receives the microprocessor calculation data; the microprocessor (13) is connected with the program-controlled attenuator A (15-1), the program-controlled attenuator B (15-2), the signal source (16), the reverse signal isolator (17), the signal analyzer 1 (18-1), the signal analyzer 2 (18-2), the S-switch A (19-1), the S-switch B (19-2), the switch circuit 1 (20-1) and the switch circuit 2 (20-2) … and the switch circuit S (20-S) to control the running states of all the connection circuits and read data from the signal analyzer;
the signal source (16) is connected with the power divider 1 (14-1) and the microprocessor, generates a signal under the control of the microprocessor, and transmits the signal to the power divider 1 (14-1);
the power divider 1 (14-1) is connected with a signal source (16), a reverse signal isolator (17), a program-controlled attenuator A (15-1) and a program-controlled attenuator B (15-2), a test signal generated by the signal source is output to the power divider 1 (14-1), the power divider 1 (14-1) divides the signal generated by the signal source into 3 paths, and the signals are respectively transmitted to the reverse signal isolator (17), the program-controlled attenuator A (15-1) and the program-controlled attenuator B (15-2);
the program-controlled attenuator B (15-2) is connected with the microprocessor (13), the power divider 1 (14-1) and the power divider 2 (14-2), and is controlled by the microprocessor, one path of signals of the power divider 1 (14-1) are transmitted to the input signal end of the program-controlled attenuator B (15-2), and the output signals of the program-controlled attenuator B (15-2) are transmitted to the power divider 2 (14-2);
the power divider 2 (14-2) is connected with the program-controlled attenuator B (15-2), the signal analyzer 1 (18-1) and the signal analyzer 2 (18-2), divides the signal of the program-controlled attenuator B (15-2) into two paths, and respectively transmits the signals to the signal analyzer 1 (18-1) and the signal analyzer 2 (18-2);
the program-controlled attenuator A (15-1) is connected with the microprocessor (13), the power divider 1 (14-1) and the signal analyzer 1 (18-1), and is controlled by the microprocessor, one path of signals of the power divider 1 (14-1) are transmitted to the input signal end of the program-controlled attenuator A (15-1), and the output signals of the program-controlled attenuator A are transmitted to the signal analyzer 1 (18-1);
the reverse signal isolator (17) is connected with the microprocessor (13), the power divider 1 (14-1) and the S-switch B (19-2), receives control of the microprocessor, and one signal of the power divider 1 (14-1) is transmitted to the reverse signal isolator (17), and an output signal of the reverse signal isolator is transmitted to the S-switch B (19-2);
the signal analyzer 1 (18-1) is connected with the microprocessor (13), the power divider 2 (14-2) and the program-controlled attenuator A (15-1), receives the control of the microprocessor, sends the analysis result to the microprocessor, and receives the output signals of the power divider 2 (14-2) and the program-controlled attenuator A (15-1);
the signal analyzer 2 (18-2) is connected with the microprocessor (13), the power divider 2 (14-2) and the S-switch A (19-1), receives the control of the microprocessor, sends the analysis result to the microprocessor, and receives the output signals of the power divider 2 (14-2) and the S-switch A (19-1);
s selects a switch B (19-2) to be connected with the microprocessor (13), the reverse signal isolator (17) and all switch circuits, receives the control of the microprocessor, selects one switch circuit at a time under the control of the microprocessor, and transmits the output signal of the reverse signal isolator (17) to the selected switch circuit;
s selects one switch A (19-1) to be connected with the microprocessor (13), the signal analyzer 2 (18-2) and all the switch circuits, receives the control of the microprocessor, selects one switch circuit at a time under the control of the microprocessor, and inputs the selected switch circuit signal to the signal analyzer 2 (18-2);
each switch circuit is connected with a microprocessor, an S-selected switch A (19-1) and an S-selected switch B (19-2), and is connected with a sensor of the rectangular section self-induction intelligent multi-input-output reinforced concrete member, and the switch circuits select working or non-working modes under the control of the microprocessor; in the inactive mode, the sensor is disconnected from the interface connected to the one-to-S switch A (19-1) and the one-to-S switch B (19-2); in the working mode, the sensor is connected with one of interfaces connected with the S-switch A (19-1) or the S-switch B (19-2); only two switching circuits are operated at a time, one of the switches connects the sensor to the S-select switch a (19-1) and the other connects the sensor to the S-select switch B (19-2); when the measuring equipment works, one sensor is selected to be connected to the signal analyzer 2 (18-2) and the other sensor is selected to be connected to the reverse signal isolator (17) through the control of the microprocessor on the switch circuit, the S-switch A (19-1) and the S-switch B (19-2).
4. The method for monitoring the health of a concrete member according to claim 1, wherein: the program flow of the method comprises a control server program flow, a rectangular section self-induction intelligent multi-input-output reinforced concrete member health condition calculating subprogram and a microprocessor program;
the control server program flow is:
the first step: setting a DATA range of a real part Rd and an imaginary part Id of the induction parameter DATA between each pair of sensors in a health state; entering a second step;
and a second step of: sending a command for setting system parameters to a microprocessor through a communication interface, wherein the sent system parameters comprise: the signal source frequency, the amplification factors of the reverse isolator, the program-controlled attenuator A and the program-controlled attenuator B, and the working modes of the signal analyzer 1 (18-1) and the signal analyzer 2 (18-2); setting the amplification factor of the reverse isolator as KF, the amplification factor of the program-controlled attenuator A as KCa, the amplification factor of the program-controlled attenuator B as KCb, and entering a third step;
and a third step of: receiving a real part Rd and an imaginary part Id of the induction parameter DATA calculated by the microprocessor through a communication interface, and entering a fourth step;
fourth step: and (3) running a health condition calculation subroutine of the rectangular section self-induction intelligent multi-input-output reinforced concrete member, and returning to the second step.
5. The method for monitoring the health of a concrete member according to claim 1, wherein: the health condition calculation subroutine of the rectangular section self-induction intelligent multi-input-output reinforced concrete member is as follows:
the first step: judging whether the real part Rd and the imaginary part Id of the sensing parameter DATA between the pair of sensors belong to a DATA range in a health state or not, if so, entering a second step; if not, entering a third step;
and a second step of: the self-induction intelligent multi-input-output reinforced concrete member with the rectangular cross section is considered to be in a healthy state, and the fourth step is carried out;
and a third step of: the self-induction intelligent multi-input-output reinforced concrete member with the rectangular cross section is considered to be in an unhealthy state, and the fourth step is carried out;
fourth step: returning to the main program.
6. The method for monitoring the health of a concrete member according to claim 1, wherein: the microprocessor program comprises a microprocessor main program and a parameter calculation subprogram, wherein the microprocessor main program is as follows:
the first step: receiving a command of a control server through a communication interface, and turning to a second step;
and a second step of: setting system parameters, wherein the set system parameters comprise: the working modes of the signal source frequency, the reverse isolator, the program-controlled attenuator A and the program-controlled attenuator B, the signal analyzer 1 (18-1) and the signal analyzer 2 (18-2) are changed to the third step;
and a third step of: let i=1, j=1; turning to a fourth step;
fourth step: judging whether i is equal to j, if not, turning to a fifth step; if yes, go to the eighth step;
s, selecting a switch B to switch on a switch circuit i, so that an output signal of the reverse signal isolator is connected to a sensor connected with the switch circuit i; s, a switch A is selected to switch on a switch circuit j, so that a sensor connected with the switch circuit j is connected with a signal analyzer 2 (18-2), and the process goes to a sixth step;
step six, receiving an in-phase component I and a quadrature component Q between a program-controlled attenuator A obtained by analysis of a signal analyzer 1 and an output signal of a power divider 2 (14-2), and setting the in-phase component obtained by analysis of the signal analyzer 1 as DATA_I1 and the quadrature component as DATA_Q1; the method comprises the steps that an in-phase component I and a quadrature component Q between a sensor connected with a switching circuit j and obtained through analysis by a received signal analyzer 2 (18-2) and an output signal of a power divider 2 (14-2) are set, the in-phase component obtained through analysis by the signal analyzer 2 (18-2) is DATA_I2, the quadrature component is DATA_Q2, and the seventh step is carried out;
seventh step: calling a parameter calculation subroutine, and turning to an eighth step;
eighth step: let j=j+1; turning to a ninth step;
ninth step: judging whether j is greater than S, if not, turning to a fourth step; if yes, turning to a tenth step;
tenth step: let j=1, i=i+1: turning to an eleventh step;
eleventh step: judging whether i is greater than S; if not, turning to a fourth step; if yes, go to the twelfth step;
twelfth step: the parameter calculation result is sent to a control server, and the first step is carried out;
the parameter calculation subroutine is:
the first step: the sensing parameter DATA is calculated as follows:
the parameter DATA is complex, the real part of DATA is denoted by Rd, the imaginary part of DATA is denoted by Id, and the calculated DATA is the sensing parameter between the sensor i and the sensor j selected when the parameter calculation subroutine is called.
And a second step of: returning to the main program of the microprocessor.
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