CN113625634A - Multi-physical-field landslide monitoring system and monitoring method - Google Patents
Multi-physical-field landslide monitoring system and monitoring method Download PDFInfo
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- CN113625634A CN113625634A CN202110926651.3A CN202110926651A CN113625634A CN 113625634 A CN113625634 A CN 113625634A CN 202110926651 A CN202110926651 A CN 202110926651A CN 113625634 A CN113625634 A CN 113625634A
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Abstract
The invention discloses a multi-physical field landslide monitoring system and a monitoring method, wherein the system comprises: monitoring device and monitor. The monitoring device receives test parameters input from the outside to generate a test command, sends the test command to the monitor, receives the measurement result of the monitor, and judges the landslide stable state according to the result; the monitor comprises a resistivity and polarizability monitor and a rock-soil sensor, and the monitor and the sensor measure the resistivity, polarizability and rock-soil parameters of the region to be measured according to the test command and send the measurement result to the monitoring device. By implementing the method, the cooperative observation of the resistivity and the polarizability on the landslide is realized, the combined observation result of the traditional rock-soil parameters is combined, a bridge of the relation between the rock-soil physical parameters and the geophysical signals of the resistivity and the polarizability is built, the real-time observation of multiple physical fields of the landslide is realized, and the basis for accurately constructing landslide starting criteria and a damage threshold is formed.
Description
Technical Field
The invention relates to the technical field of landslide monitoring, in particular to a multi-physical-field landslide monitoring system and a multi-physical-field landslide monitoring method.
Background
Geological disasters refer to geological effects or phenomena formed under the action of natural or human factors, which cause losses to human life and property, and damage to the environment. The current geological disasters comprise landslide, collapse, debris flow, ground cracks, ground settlement, ground collapse, rock burst, gallery water burst, mud burst, gas burst, coal bed spontaneous combustion, loess collapsibility, rock-soil expansion, sandy soil liquefaction, land freeze thawing, water and soil loss, land desertification and marshlization, soil salinization, earthquake, volcano, geothermal damage and the like.
Among them, landslide caused by disasters such as earthquake or rainwater causes huge loss to China. Therefore, monitoring of landslides is urgently needed. The landslide monitoring technology is a monitoring technology for loess landslide and mountain landslide, and is used for monitoring landslide and reducing loss caused by landslide. At present, the real-time monitoring of geophysical signals for landslide is less, and the conventional geotechnical engineering is measured by a single hole, so that the depth is limited and the space is discontinuous.
How to carry out real-time accurate large-range, large-depth and large-data real-time monitoring on the landslide is a problem to be solved urgently at present.
Disclosure of Invention
In view of this, embodiments of the present invention provide a multi-physical field landslide monitoring system and a monitoring method, which combine a large-scale, large-depth measurement and continuous measurement multi-physical field landslide monitoring technology based on geophysical with single-hole measurement, point-surface combination, depth combination, space-time combination and multi-parameter comprehensive measurement, so as to solve the technical problems in the prior art that landslide monitoring parameters are few, depth is shallow, measurement surface is small, and large-scale landslide cannot be accurately monitored in real time.
The technical scheme provided by the invention is as follows:
a first aspect of an embodiment of the present invention provides a multi-physical-field landslide monitoring system, including: monitoring device and monitor. The monitoring device receives test parameters input from the outside to generate a test command, sends the test command to the monitor, receives the measurement result of the monitor, monitors landslide according to the measurement result and judges whether landslide exists; the monitor comprises a resistivity and polarizability monitor and a geotechnical sensor, the resistivity and polarizability monitor is used for measuring the resistivity and polarizability of the region to be measured according to the test command, the geotechnical sensor is used for measuring geotechnical parameters of the region to be measured according to the test command, and the monitor is used for sending the measurement result to the monitoring device.
Optionally, the multi-physical field monitoring device comprises: the base ARM system comprises a base ARM processor, a cloud system, a GPRS module and an ARM control system. The base ARM processor is used for sending a test command to the cloud system; the cloud system is used for transmitting the test command to the ARM control system through the GPRS module; the ARM control system is used for decoding the test command and controlling the monitor to work according to a decoding result. The ARM control system is also used for receiving the measurement result of the monitor and sending the measurement result to the base ARM processor through the GPRS module and the cloud system; and the base ARM processor receives the measurement result for processing, performs landslide monitoring according to the processing result and judges whether landslide exists.
Optionally, the geotechnical sensor comprises: a water monitor, a water level monitor, a pore pressure monitor, a soil pressure monitor, a temperature monitor, a displacement monitor, a rainfall monitor, and the like.
Optionally, the resistivity and polarizability monitor includes a processing module, an electrode converter, a current transmitter, a filter, an AD converter, and a plurality of electrodes, where the processing module is configured to receive the test command, decode the test command, and transmit a decoding result to the electrode converter; the electrode converter is used for combining the plurality of electrodes into a plurality of electrode combinations of A, M, N and B according to the decoding result; the processing module is also used for controlling the current transmitter to supply power to the underground through AB electrodes at different positions according to the decoding result and measuring the current; the filter receives voltage signals returned by the combination of the A electrode, the M electrode, the N electrode and the B electrode for filtering; the AD converter receives the filtered voltage and performs analog-to-digital conversion to obtain a voltage digital signal; and the processing module receives the voltage digital signal and calculates to obtain the resistivity and the polarizability of the region to be detected.
Optionally, when the first port of the processing module is at a high level, the current transmitter is controlled to supply power in a forward direction from the electrode A to the electrode B and measure a forward current, and the filter receives a current when the power is supplied, a first voltage signal of the electrode when the power is supplied and a second voltage signal of the electrode when the power is off; when the second port of the processing module is in a high level, the current transmitter is controlled to supply power in a reverse direction from the electrode B to the electrode A and measure reverse current, and the filter receives current during power supply, a third voltage signal of the electrode during power supply and a fourth voltage signal of the electrode during power off.
Optionally, the filter is further used for receiving an externally input voltage compensation natural potential; the AD converter is used for converting the current and voltage signals into corresponding digital signals; and the processing module receives the digital signals of the current and the voltage and calculates to obtain the resistivity and the polarizability of the region to be detected.
Optionally, an antenna is adopted among the base ARM processor, the cloud system, the GPRS module and the ARM control system to transmit test commands and test parameters; and the ARM control system transmits signals with the monitor through the RS485 communication module.
Optionally, the multi-physical-field landslide monitoring system further comprises: the touch control device and the display device are connected with the monitoring device; the touch device is used for inputting test parameters and sending the test parameters to the monitoring device and the display device; the display device is used for displaying the test parameters and the measurement results.
A second aspect of the embodiments of the present invention provides a multi-physical-field landslide monitoring method, which is applied to a multi-physical-field landslide monitoring system according to any one of the first aspect and the first aspect of the embodiments of the present invention, and the method includes: inputting test parameters; generating a test command according to the test parameters; controlling the resistivity and polarizability monitor to test the resistivity and polarizability of the region to be tested according to the test command; and judging whether the area to be detected has landslide or not according to the measurement results of the resistivity and the polarizability.
Optionally, controlling the resistivity and polarizability monitor to perform the resistivity and polarizability test on the region to be tested according to the test command and the test parameter, including: performing power supply measurement from the first electrode AMNB combination of the initial layer of the first measuring line, and calculating resistivity and polarizability according to the measurement result; moving the position of the electrode backwards, continuously selecting an AMNB electrode combination to measure and calculate the resistivity and the polarizability until the measurement and calculation of the last electrode combination of the initial layer are completed; increasing the intervals among the electrode A, the electrode M, the electrode N and the electrode B, measuring and calculating the resistivity and the polarizability until the measurement of all the electrodes is finished; measuring moisture data, water level data, pore pressure data, soil pressure data, temperature data, displacement data and rainfall data by using a moisture monitor, a water level monitor, a pore pressure monitor, a soil pressure monitor, a temperature monitor, a displacement monitor and a rainfall monitor to finish the measurement of a measuring line and obtain a two-dimensional measurement result; transferring to the next electrode measuring line, and measuring the resistivity, the polarizability, the moisture data, the water level data, the pore pressure data, the soil pressure data, the temperature data, the displacement data and the rainfall data according to a two-dimensional measuring mode until all measuring lines are measured to obtain a three-dimensional measuring result; and (4) continuously carrying out two-dimensional measurement and three-dimensional measurement at preset time intervals to obtain a four-dimensional measurement result.
The technical scheme of the invention has the following effects:
according to the multi-physical-field landslide monitoring system provided by the embodiment of the invention, the monitoring device and the resistivity and polarizability monitor are arranged, the monitoring device controls the resistivity and polarizability monitor to measure the resistivity and polarizability of the region to be measured through the externally input test command and test parameters, and whether landslide exists or not is judged according to the measurement result of the resistivity and polarizability. Therefore, the multi-physical-field landslide monitoring system not only realizes real-time landslide monitoring, but also judges the landslide by adopting the calculation result of the resistivity and the polarizability of the region to be detected, and further improves the landslide judgment accuracy.
According to the multi-physical-field landslide monitoring method provided by the embodiment of the invention, a test command is generated by receiving externally input test parameters, the resistivity and polarizability monitor is controlled according to the test command to measure the resistivity and polarizability of a region to be tested, and whether landslide exists or not is judged according to the measurement result of the resistivity and polarizability. Therefore, the multi-physical-field landslide monitoring method not only realizes real-time monitoring of landslide, but also judges the landslide by adopting the calculation result of the resistivity and the polarizability of the region to be detected, and improves the accuracy of landslide judgment. In addition, when determining a landslide, the accuracy of landslide determination can be further improved by comprehensively considering the monitoring results of monitors such as a moisture monitor, a water level monitor, a pore pressure monitor, a soil pressure monitor, a temperature monitor, a displacement monitor, and a rainfall monitor.
The multi-physical-field landslide monitoring system and the monitoring method provided by the embodiment of the invention combine the large-range, large-depth measurement and continuous measurement multi-physical-field landslide monitoring technology based on geophysical with single-hole measurement, point-surface combination, depth combination, space-time combination and multi-parameter comprehensive measurement, so as to solve the technical problems that in the prior art, landslide monitoring parameters are few, the depth is shallow, the measurement surface is small, and large-scale landslide cannot be accurately monitored in real time.
The multi-physical-field landslide monitoring system and the monitoring method provided by the embodiment of the invention realize the cooperative observation of the resistivity and the polarizability on the landslide, also combine the combined observation result of the traditional rock-soil parameters, build a bridge of the relation between the rock-soil physical parameters and the geophysical signals of the resistivity and the polarizability, realize the real-time observation of the multi-physical-field landslide, and form the basis for accurately constructing landslide starting criteria and a damage threshold.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of a multi-physics landslide monitoring system in an embodiment of the invention;
FIG. 2 is a block diagram of a multi-physics landslide monitoring system in accordance with another embodiment of the present invention;
FIG. 3 is a block diagram of a multi-physics landslide monitoring system in accordance with another embodiment of the present invention;
FIG. 4 is a circuit diagram of an ARM control system according to an embodiment of the present invention;
FIG. 5 is a control circuit diagram of a resistivity and polarizability monitor in accordance with an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a filter and an AD converter according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating compensation of natural potential of analog signals according to an embodiment of the present invention;
FIG. 8 is a diagram of an AMNB electrode control circuit in accordance with an embodiment of the present invention;
FIG. 9 is a flow chart of a multi-physics landslide monitoring method in an embodiment of the present invention;
FIG. 10 is a flow chart of a multi-physics landslide monitoring method in another embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a multi-physical-field landslide monitoring system, as shown in fig. 1, the system comprises: a monitoring device 10 and a monitor 20. The monitoring device 10 receives an externally input test parameter to generate a test command, sends the test command to the monitor 20, receives a measurement result of the monitor 20, and performs landslide monitoring according to the measurement result; the monitor 20 comprises a resistivity and polarizability monitor and a geotechnical sensor, wherein the resistivity and polarizability monitor is used for measuring and calculating the resistivity and polarizability of the region to be measured according to the test command and the test parameters, the geotechnical sensor is used for measuring the geotechnical parameters of the region to be measured according to the test command, and the monitor is used for sending the calculation result to the monitoring device. When landslide occurs, the landslide surface contains water, meanwhile, accumulated water is generated by a fault formed by the landslide, and when the water content is high, the polarizability is high and the resistivity is small, so that when the resistivity and the polarizability in a measurement result exceed threshold values, the fact that the landslide possibly occurs in an area to be measured can be judged, and the multi-physical-field landslide monitoring system sends out landslide early warning.
According to the multi-physical-field landslide monitoring system provided by the embodiment of the invention, the monitoring device and the resistivity and polarizability monitor are arranged, the monitoring device controls the resistivity and polarizability monitor to measure the resistivity and polarizability of the region to be measured through the externally input test command and test parameters, and whether landslide occurs or not is judged by using the measurement result of the resistivity and polarizability. Therefore, the multi-physical-field landslide monitoring system not only realizes real-time landslide monitoring, but also judges the landslide by adopting the calculation result of the resistivity and the polarizability of the region to be detected, and further improves the landslide judgment accuracy.
As an optional implementation manner of the embodiment of the present invention, as shown in fig. 2, the monitoring device 10 includes: the base ARM system comprises a base ARM processor, a cloud system, a GPRS module and an ARM control system. The base ARM processor is used for sending the test command to the cloud system; the cloud system is used for transmitting the test command to the ARM control system through the GPRS module; the ARM control system is used for decoding the test command and controlling the monitor to work according to the decoding result; the ARM control system is also used for receiving the measurement result of the monitor and sending the measurement result to the base ARM processor through the GPRS module and the cloud system; and the base ARM processor receives the measurement result for processing and carries out landslide monitoring according to the processing result.
In one embodiment, as shown in fig. 2 and 3, the antenna is used for transmitting the test command between the base ARM processor, the cloud system, the GPRS module and the ARM control system. The monitoring device is also provided with a transmitter-receiver, the transmitter-receiver is used for transmitting the test command sent by the base ARM processor to the cloud system, and the transmitter-receiver can amplify the power of the sent test command to prevent errors. And the GPRS module receives the test command forwarded by the cloud system and transmits the test command to the ARM control system through RS 485. In addition, the monitoring device also comprises a memory, and the memory is used for storing the measurement result returned by the cloud system for the base ARM processor to call.
As an alternative implementation of the embodiment of the present invention, as shown in fig. 2 and 3, the geotechnical sensor includes: the water content monitor, the water level monitor, the pore pressure monitor, the soil pressure monitor, the temperature monitor, the displacement monitor, the rainfall monitor and the like, and if a camera, a seismograph and the like can be arranged. The ARM control system carries out signal transmission through the RS485 interface and the monitors. The ARM control system decodes the test command sent by the ARM processor, the monitor is communicated with the RS485 of 8 monitors through the RS485 interface, the monitors decode the test command respectively, measure according to the test parameters, read the measurement result, and send the measurement result to the base ARM processor through the RS485 interface, the ARM control system and the GPRS module and the transmitting receiver for processing.
Specifically, a specific structural diagram of the ARM control system is shown in fig. 4. The model of the ARM control chip U3 selects ARM251, and the ARM control chip U3 is connected with RS485 communication interfaces of the GPRS module through TXD1 and RXD1 of serial ports and 485AO1 and 485BO1 pins of the RS 4851; the serial ports TXD2 and RXD2 of the ARM control chip U3 and the 485AO2 and 485BO2 pins of the RS4852 are connected with RS485 interfaces of the eight monitors. The RS4851 transmits the received test command to the ARM control chip U3 for decoding to obtain test parameters, the RS4852 communicates with RS485 interfaces of 8 monitors, each monitor is controlled to measure according to the test parameters of each monitor obtained through decoding, and measurement data or results are read.
As an optional implementation manner of the embodiment of the present invention, as shown in fig. 3, the resistivity and polarizability monitor includes a processing module CPU82, an electrode converter 81, a current transmitter 85, a filter 86, an AD converter 87, and a plurality of electrodes 83, wherein the processing module CPU82 is configured to receive and decode the test command and the test parameter, and transmit the decoded result to the electrode converter 84; the electrode converter 84 is used for combining the plurality of electrodes 83 into a plurality of electrode combinations of an electrode A, an electrode M, an electrode N and an electrode B according to the decoding result; the processing module CPU82 is also used for controlling the current transmitter to supply power to the underground through AB electrodes at different positions according to the decoding result and measuring the current; the filter receives voltage signals returned by the combination of the A electrode, the M electrode, the N electrode and the B electrode for filtering; the AD converter receives the filtered voltage and performs analog-to-digital conversion to obtain a voltage digital signal; and the processing module receives the voltage digital signal and calculates to obtain the resistivity and the polarizability of the region to be detected.
In one embodiment, the resistivity and polarizability monitor is partially constructed as shown in fig. 5, and the processing module CPU82 is a model STC15W4K60S4 chip. Wherein the outputs C + and C-of the processing module CPU82 control the supply of power. When the first port C + is at a high level, the current transmitter is controlled to supply power to the B electrode from the A electrode in a forward direction and measure a forward current I +, and the filter receives a first voltage signal V1+ of the MN electrode during power supply and a second voltage signal V2+ of the MN electrode during power failure; the current transmitter is controlled to supply power in reverse from the B electrode to the a electrode when the second port C-is high and to measure a reverse current I-, the filter receives a third voltage signal V1-for the MN electrode when power is supplied and a fourth voltage signal V2-for the MN electrode when power is off. And the obtained voltage signal is sent to an ARM control system through an RS485 interface to calculate the resistivity and the polarizability.
Specifically, when the ARM control system calculates the resistivity and the polarizability, a first voltage signal V1+ and a third voltage signal V1-are averaged to obtain V1 when power is supplied, a second voltage signal V2+ and a fourth voltage signal V2-are averaged to obtain V2 after power is cut off, and the polarizability eta is calculated by dividing the V1 according to V2; and averaging I + and I-to obtain I, and calculating the resistivity rho according to the division of V by I. The more the moisture in the earth, the larger the polarizability value and the smaller the resistivity value.
In one embodiment, the circuit structure of the filter and the AD converter is as shown in fig. 6, the OP1 constitutes the filter, the OP2 is an adder, and the AD converter is an AD1210 chip. Specifically, after OP1 filtering, the second port of OP2 receives an externally input voltage-compensated natural potential VSP, the AD converter converts the voltage passing through OP2 into a digital signal, and at the same time, the AD converter also converts the measured current signal into a digital signal; and the processing module receives the converted voltage digital signal and current digital signal to calculate the resistivity and the polarizability of the region to be measured.
Specifically, as shown in fig. 7, the ground has a natural potential, and the magnitude of the natural potential VSP is sometimes large, affecting the accuracy of the AD converter. If the natural potential VSP reaches a certain level, the AD converter may be saturated and distorted. For example:
v1-1000 mV, VSP-4000 mV, then V1+ 4000+1000
5000mV, V1- ═ 4000+1000 ═ 3000m, V1 ═ (V1+ -V1-)/2 ═ 5000-3000)/2 ═ 1000mV, although the calculated values were unchanged. However, 5000mV becomes smaller than 5000mV in the AD converter, and the digital value of V1 becomes smaller, resulting in distortion. Therefore, the natural potential VSP is compensated by the second port input voltage of the OP2, thereby improving the quantization accuracy of the analog signal.
In one embodiment, the electrode converter combines a plurality of electrodes into a plurality of a, M, N and B electrode combinations, and hundreds of electrodes may be combined into a plurality of A, M, N, B electrode combinations. Hundreds of electrodes can be arranged into a plurality of measuring lines for three-dimensional measurement, and time shift measurement capable of reflecting abnormal change rules of landslide can be formed by continuous power supply measurement at different time. Specifically, the circuit of the electrode converter is as shown in fig. 8. K0-K3 respectively gate different electrode positions of the switch. A. The B electrode is powered and the M, N electrode receives a voltage signal. The greater the distance between AB, the deeper the measurement depth. Thus, by varying the distance between the AB electrodes, the monitoring depth of the resistivity and polarizability monitor can be made to hundreds of meters.
In one embodiment, as shown in fig. 3, the multi-physics landslide monitoring system further comprises: the touch control device and the display device are connected with the monitoring device; the touch device is used for inputting test parameters and sending the test parameters to the monitoring device and the display device; the display device is used for displaying the test parameters and the measurement results. The touch device is a touch screen, and the display device is a liquid crystal display screen or an LED display screen. The measurement results displayed by the display device include received data, processed profile and data files, etc.
The embodiment of the present invention further provides a multi-physical-field landslide monitoring method, as shown in fig. 9, where the multi-physical-field landslide monitoring method is applied to the multi-physical-field landslide monitoring system described in the above embodiment, and the method includes the following steps:
step S101: inputting test parameters; in particular, a touch device such as a touch screen may be employed to input the test parameters. The test parameters can be input according to the type of the set monitor, and if 8 monitors are set, the test parameters of the 8 monitors can be respectively input. The touch device may send the test parameters to the monitoring device after receiving the test parameters. In addition, before measurement, the multi-physical-field landslide monitoring system can be detected to judge whether the multi-physical-field landslide monitoring system works normally or not.
Step S102: generating a test command according to the test parameters; specifically, the monitoring device may encode the received test parameters to generate a test command, and then may control the corresponding monitor to operate according to the test command.
Step S103: controlling the resistivity and polarizability monitor to test the resistivity and polarizability of the region to be tested according to the test command; specifically, when the monitor includes a resistivity and a polarizability monitor, the monitoring apparatus may decode the received test command to generate test parameters of the resistivity and the polarizability monitor, so as to facilitate the resistivity and the polarizability monitor to perform corresponding test parameters for measurement. Meanwhile, the monitor can be provided with a water monitor, a water level monitor, a pore pressure monitor, a soil pressure monitor, a temperature monitor, a displacement monitor and a rainfall monitor for comprehensive monitoring after the resistivity monitor and the polarizability monitor.
Step S104: and judging whether the area to be detected has landslide or not according to the measurement results of the resistivity and the polarizability. Specifically, after the resistivity and polarizability monitor completes the test, the measurement result may be sent to the monitoring device, and the monitoring device determines whether a landslide occurs according to the measurement result. For example, when the resistivity and polarizability in the measurement result are greater than a certain threshold, it is determined that a landslide occurs. In addition, when multiple physical quantity landslide monitoring is carried out, monitoring results of other monitors can be comprehensively considered, and therefore the judgment result is more accurate.
According to the multi-physical-field landslide monitoring method provided by the embodiment of the invention, a test command is generated by receiving externally input test parameters, the resistivity and polarizability monitor is controlled according to the test command to measure the resistivity and polarizability of a region to be tested, and whether landslide exists or not is judged according to the measurement result of the resistivity and polarizability. Therefore, the multi-physical-field landslide monitoring method not only realizes real-time landslide monitoring, but also judges the landslide by adopting the calculation result of the resistivity and the polarizability of the region to be detected, and improves the landslide judgment accuracy. In addition, when determining a landslide, the accuracy of landslide determination can be further improved by comprehensively considering the monitoring results of monitors such as a moisture monitor, a water level monitor, a pore pressure monitor, a soil pressure monitor, a temperature monitor, a displacement monitor, and a rainfall monitor.
As an optional implementation manner of the embodiment of the present invention, as shown in fig. 10, step S103: controlling the resistivity and polarizability monitor to test the resistivity and polarizability of the region to be tested according to the test command and the test parameters, comprising the following steps:
step S201: and performing power supply measurement from the first electrode AMNB combination of the initial layer of the first measuring line, and calculating the resistivity and the polarizability according to the measurement result. In particular, hundreds of electrodes may be provided in the resistivity and polarizability monitor, which may be arranged in a plurality of lines. Multiple lines measure the position of the earth's surface at different depths. During testing, the first electrode AMNB combination may be selected for measurement from a start layer of a first measurement line, where the AMNB electrode spacing in the start layer is 1, that is, the first electrode AMNB combination is a #, M is 2#, N is 3#, and B is 4 #. After the electrodes are selected, the influence of the earth natural potential is removed by compensating the natural potential through the input voltage. When C + is high, power is positively supplied from the a electrode to the B electrode and a positive supply current I + is measured, a voltage V1+ between MN is measured, and V2+ is measured after power off. When C-is high, the power is reversely supplied from the B electrode to the A electrode and the reverse supply current I is measured, the voltage V1 between MN is measured, and V2 is measured after power off. The analog voltage is filtered by OP1, compensated by OP2 to natural potential, and then sent to AD converter to convert the analog signal into digital quantity. The average value of the positive voltage and the negative voltage during power supply is V1, and the average value of the positive voltage and the negative voltage after power failure is V2. Finally, the polarizability eta is obtained by dividing V2 by V1, the resistivity rho is obtained by dividing V1 by I, and the resistivity rho is sent to an ARM processor through an RS485 interface and a cloud system for calculation processing.
Step S202: and moving the position of the electrode backwards to continuously select the AMNB electrode combination for measuring and calculating the resistivity and the polarizability until the measurement and calculation of the last electrode combination of the initial layer are completed.
After the second electrode combination is measured, the electrodes may continue to be moved backward in sequence, one electrode combination is measured each time, and the electrode distance in each electrode combination is 1, until the last electrode combination measurement calculation of the starting layer is completed.
Step S203: increasing the intervals among the electrode A, the electrode M, the electrode N and the electrode B, and measuring and calculating the resistivity and the polarizability until all the electrodes are measured; specifically, after the initial layer measurement is completed, the distances among the a electrode, the M electrode, the N electrode, and the B electrode may be increased, and the electrode combination measurement of the second layer, the third layer, and up to the nth layer may be performed.
In one embodiment, in the second layer, the electrode distance may be set to 2, for example, the first electrode combination a in the second layer is 1#, M is 3#, N is 5#, and B is 7#, and then the electrode is moved in the manner of the measurement of the initial layer to perform the measurement of the next electrode combination until the final electrode combination measurement calculation of the second layer is completed. Then, a third layer test was performed in which the electrode pitch was set to 3, and then measurement calculation of the third layer electrode combination was performed in the same manner as the second layer. And by analogy, the distance between the electrodes is n from the last layer to the nth layer until the measurement calculation of the last electrode combination of the nth layer is completed, and the measurement of the resistivity and the polarizability of one section is realized. In the measuring process, the distance between the AB electrodes is increased, the measuring depth can be improved, and the depth of hundreds of meters can be measured finally.
Step S204: carrying out geotechnical engineering measurement parameters, namely measuring moisture data, water level data, pore pressure data, soil pressure data, temperature data, displacement data and rainfall data by a moisture monitor, a water level monitor, a pore pressure monitor, a soil pressure monitor, a temperature monitor, a displacement monitor and a rainfall monitor to obtain geotechnical engineering measurement parameters, completing measurement of a measuring line, combining the geotechnical engineering measurement parameters with resistivity and polarizability, constructing a relation between parameter properties and resistivity and polarizability signals, and converting the signals into properties; specifically, after one profile resistivity and polarizability measurement is completed, other monitor measurements may be made. The measurement data of other monitors can be sent to the ARM processor through the RS485 interface for processing and displaying. Therefore, the multi-point multi-layer large-depth two-dimensional measurement of eight kinds of monitoring data on one measuring line is completed.
Step S205: transferring to the next electrode measuring line, and measuring the resistivity, the polarizability, the moisture data, the water level data, the pore pressure data, the soil pressure data, the temperature data, the displacement data and the rainfall data according to a two-dimensional measuring mode until all measuring lines are measured to obtain a three-dimensional measuring result; specifically, after the measurement of the first measuring line is completed, the measurement is transferred to the next measuring line to measure the resistivity, the polarizability, the moisture data, the water level data, the pore pressure data, the soil pressure data, the temperature data, the displacement data, the rainfall data, and the like. When measuring the resistivity and the polarizability, the multi-layer measurement can be performed in the manner of the first measuring line. And then, transferring to the next measuring line to measure in the above mode until the measurement of the resistivity and the polarizability of all the layers and all the measuring points of all the measuring lines is finished, and forming a three-dimensional measuring result.
Step S206: and (4) continuously carrying out two-dimensional measurement and three-dimensional measurement at preset time intervals to obtain a four-dimensional measurement result. Specifically, after the two-dimensional and three-dimensional measurements are completed, the two-dimensional measurement and the three-dimensional measurement may be continued for another period of time at an interval of a preset time, and finally the time-shifted three-dimensional measurement is formed. All the measurement results can be processed in the base ARM processor, and a color section diagram, various data files and the like are displayed on the display device. Therefore, the multi-physical-field landslide monitoring method can be used for continuously supplying power for a long time at different time to measure and form time shift measurement capable of reflecting the abnormal change rule of the landslide.
Although the present invention has been described in detail with respect to the exemplary embodiments and the advantages thereof, those skilled in the art will appreciate that various changes, substitutions and alterations can be made to the embodiments without departing from the spirit and scope of the invention as defined by the appended claims. For other examples, one of ordinary skill in the art will readily appreciate that the order of the process steps may be varied while maintaining the scope of the present invention.
Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, structure, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, structures, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, structures, manufacture, compositions of matter, means, methods, or steps.
Claims (10)
1. A multi-physics landslide monitoring system, comprising: a monitoring device and a monitor, wherein the monitoring device comprises a monitoring head,
the monitoring device receives an externally input test parameter to generate a test command, sends the test command to the monitor, receives a measurement result of the monitor, and judges whether the landslide exists or not according to the measurement result;
the monitor comprises a resistivity and polarizability monitor and a geotechnical sensor, the resistivity and polarizability monitor is used for measuring the resistivity and polarizability of the region to be measured according to the test command, the geotechnical sensor is used for measuring geotechnical parameters of the region to be measured according to the test command, and the monitor is used for sending the measurement result to the monitoring device.
2. The multi-physics landslide monitoring system of claim 1 wherein said monitoring means comprises: a base ARM processor, a cloud system, a GPRS module and an ARM control system,
the base ARM processor is used for sending a test command to the cloud system;
the cloud system is used for transmitting the test command to the ARM control system through the GPRS module;
the ARM control system is used for decoding the test command and controlling the monitor to work according to a decoding result, and is also used for receiving a measurement result of the monitor and sending the measurement result to the base ARM processor through the GPRS module and the cloud system;
and the base ARM processor receives the measurement result for processing, and judges whether the landslide exists according to the processing result.
3. The multi-physical-field landslide monitoring system of claim 1, wherein said geotechnical sensor comprises: moisture monitor, water level monitor, pore pressure monitor, soil pressure monitor, temperature monitor, displacement monitor, rainfall monitor.
4. The multiphysics landslide monitoring system according to claim 2, wherein the resistivity and polarizability monitor comprises a processing module, an electrode converter, a current transmitter, a filter, an AD converter and a plurality of electrodes,
the processing module is used for receiving the test command, decoding the test command and sending a decoding result to the electrode converter;
the electrode converter is used for combining the plurality of electrodes into a plurality of electrode combinations of A, M, N and B according to the decoding result;
the processing module is also used for controlling the current transmitter to transmit power supply current to the underground through AB electrodes at different positions according to the decoding result;
the filter receives voltage signals returned by the combination of the A electrode, the M electrode, the N electrode and the B electrode for filtering;
the AD converter receives the filtered voltage and performs analog-to-digital conversion to obtain a voltage digital signal;
and the processing module receives the voltage digital signal and calculates to obtain the resistivity and the polarizability of the region to be detected.
5. The multi-physics landslide monitoring system of claim 4 wherein,
when the first port of the processing module is at a high level, the current transmitter is controlled to supply power to the B electrode from the A electrode in a forward direction and measure forward current, and the filter receives the current during power supply, a first voltage signal of the electrode during power supply and a second voltage signal of the MN electrode during power off;
when the second port of the processing module is at a high level, the current transmitter is controlled to supply power in a reverse direction from the electrode B to the electrode A and measure a reverse current, and the filter receives the current during power supply, the third voltage signal of the electrode during power supply and the fourth voltage signal of the electrode MN during power off.
6. The multi-physics landslide monitoring system of claim 4 wherein,
the filter is also used for receiving an externally input voltage compensation natural potential;
the AD converter is also used for converting the current and the voltage into digital signals;
and the processing module receives the current and voltage digital signals and calculates to obtain the resistivity and the polarizability of the region to be measured.
7. The multi-physics landslide monitoring system of claim 4 wherein,
the base ARM processor, the cloud system, the GPRS module and the ARM control system adopt an antenna to transmit test commands and test parameters;
and the ARM control system transmits signals with the monitor through the RS485 communication module.
8. The multi-physics landslide monitoring system of claim 1 further comprising: the touch control device and the display device are connected with the monitoring device;
the touch device is used for inputting test parameters and sending the test parameters to the monitoring device and the display device;
the display device is used for displaying the test parameters and the measurement results.
9. A multi-physical-field landslide monitoring method applied to the multi-physical-field landslide monitoring system of any one of claims 1-8, the method comprising:
inputting test parameters;
generating a test command according to the test parameters;
controlling the resistivity and polarizability monitor to test the resistivity and polarizability of the region to be tested according to the test command;
and judging whether the area to be detected has landslide or not according to the measurement results of the resistivity and the polarizability.
10. The method of claim 9, wherein controlling the resistivity and polarizability monitor to perform the resistivity and polarizability tests of the region under test according to the test commands and the test parameters comprises:
performing power supply measurement from the first electrode AMNB combination of the initial layer of the first measuring line, and calculating resistivity and polarizability according to the measurement result;
moving the position of the electrode backwards, continuously selecting an AMNB electrode combination to measure and calculate the resistivity and the polarizability until the measurement and calculation of the last electrode combination of the initial layer are completed;
increasing the intervals among the electrode A, the electrode M, the electrode N and the electrode B, measuring and calculating the resistivity and the polarizability until all electrodes of all layers complete two-dimensional measurement;
carrying out traditional geotechnical engineering observation, and measuring moisture data, water level data, pore pressure data, soil pressure data, temperature data, displacement data and rainfall data by utilizing a moisture monitor, a water level monitor, a pore pressure monitor, a soil pressure monitor, a temperature monitor, a displacement monitor and a rainfall monitor to obtain traditional geotechnical engineering physical parameters; combining the measured resistivity and polarizability results, constructing a relation between parameter properties and resistivity and polarizability signals, and converting geophysical signals into geotechnical engineering properties;
transferring to the next electrode measuring line, and measuring the resistivity, the polarizability, the moisture data, the water level data, the pore pressure data, the soil pressure data, the temperature data, the displacement data and the rainfall data according to a two-dimensional measuring mode until all measuring lines are measured to obtain a three-dimensional measuring result;
and (4) continuously carrying out two-dimensional measurement and three-dimensional measurement at preset time intervals to obtain a four-dimensional measurement result.
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