A network monitoring system and method for dynamic time-shift electric field of groundwater in mine tunnels

Abstract

The present invention belongs to the field of geophysical measurement, and relates to a network monitoring system and method for dynamic time-shift electric field of underground water in mine tunnels, including: a field acquisition system, a network data transmission system, and a data management and inversion system, wherein the field acquisition system includes an electrode array module, a transmitting module, an acquisition module, and a control module, and the control module controls the selection of power supply electrodes and measuring electrodes of the transmitting module, the acquisition module, and the electrode array module; the data transmission system sends the control command to the field acquisition system through the UDP / IP protocol and Ethernet; after the acquisition module acquires the signal, the UDP / IP protocol and Ethernet are connected to the monitoring center server through a router; the data management and inversion system is remotely configured through software, and data is acquired in real time or on demand every day according to a pre-set schedule, and the data is inverted to generate a resistivity model. Realize long-term real-time detection, and place the field instrument permanently to avoid repeated manual field measurements.

Description

Technical Field

[0001] The present invention belongs to the field of geophysical measurement, and more specifically, relates to a networked real-time monitoring system and method for the dynamic time-shift electric field of groundwater in a mine tunnel. Background Art

[0002] In areas with high incidence of mine water disasters, various types of surface water or groundwater flow into or burst into the mining workspace through certain infiltration channels, affecting the normal production of the mine and even causing major flooding accidents. Mine water inrush is one of the mine disasters that seriously threaten the life safety of underground workers. In the existing technology, the detection data is mainly returned to the original space through three-dimensional modeling and numerical processing methods such as network mapping before analysis and processing. However, due to the presence of minerals in underground tunnels, the underground structure is non-uniform, and there may be deviations between the numerical simulation results and the actual situation. It is impossible to achieve high-precision detection requirements by relying on numerical processing methods. Resistivity tomography technology can produce higher resolution than conventional resistivity technology and is more economical than seismic wave tomography. Since it was first proposed by SHIMA in 1987, it has developed rapidly in the past decade. At present, resistivity tomography technology is widely used in groundwater monitoring. The ability to monitor the dynamics of groundwater in mine tunnels in real time will provide a major guarantee for the safety of underground workers.

[0003] The current technology of monitoring groundwater in mines by resistivity tomography is that the connection between electrodes and PC is connected by cables, and the survey personnel need to carry equipment into the mine tunnels for collection. During on-site measurement, all electrodes are arranged at measuring points at certain intervals, and the multi-core cable is connected to the program control switch. Under the control of the preset program, the electrode arrangement, the rapid conversion between the electrode spacing and the measuring points and the data collection are realized. Then, the collected data is processed by tomography through the computer, the results are output in a certain graphic image form, and the data is returned to the PC on site through the cable. Although compared with the traditional manual resistivity measurement method, the error of manual measurement is avoided, but this detection method also has some disadvantages. First, due to the time limit and intermittent nature of manual detection, the real-time and dynamic nature of the data cannot be guaranteed, and it is impossible to provide accurate prediction and inference of the future dynamics and migration of groundwater in mine tunnels based on the data. Second, after the data is collected from the on-site PC, it is transmitted to the control center and the image is generated again. There is a time difference, and the current discovery and processing of groundwater dynamics are not timely. Third, since it is necessary to manually enter the tunnel for measurement, it also affects the progress of mineral mining and the safety of detection personnel. In summary, the current monitoring method has great limitations. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a networked monitoring system and method for the dynamic time-shift electric field of groundwater in mine tunnels, so as to realize real-time measurement and long-term detection, and permanently place the on-site instruments to avoid repeated manual on-site measurements.

[0005] The present invention is implemented as follows: a network monitoring system for the dynamic time-shift electric field of underground water in a mine tunnel, the system comprising: a field acquisition system, a network data transmission system and a data management and inversion system, wherein:

[0006] The field acquisition system includes an electrode array module, a transmitting module, an acquisition module and a control module, and the control module controls the selection of power supply electrodes and measuring electrodes of the transmitting module, the acquisition module and the electrode array module;

[0007] The network data transmission system sends the control command to the on-site acquisition system through the UDP / IP protocol and Ethernet. After the acquisition module collects the signal, it is connected to the monitoring center server through the router through the UDP / IP protocol and Ethernet for data transmission.

[0008] The data management and inversion system is remotely configured via software, acquiring data in real time or on demand every day according to a pre-set schedule, and inverting the data to generate a resistivity model.

[0009] Furthermore, the control module switches the electrode array module according to the received instruction and sends a control signal to the constant voltage source, and the constant voltage source supplies corresponding current to the power supply electrode according to the control signal.

[0010] Furthermore, the transmitting module includes a DC / DC constant voltage source and an inverter, the constant voltage source provides a transmitting current, and the transmitting current is converted into an AC signal through the inverter, wherein the constant voltage source circuit is a DC / DC constant voltage source.

[0011] Furthermore, the control bus is arranged in a network shape in the mine tunnel, the electrode module array is connected through the bus, the bus is arranged in the mine tunnel, the electrode module is composed of a metal electrode, a non-polarized electrode, a control module and a switch, the metal electrode is used to transmit a large current, the non-polarized electrode is used to detect the voltage, the switch is controlled by a relay, and the control module controls the switch of the relay of this module according to the bus signal. The electrode module is connected to the transmitting module or the acquisition module through the bus, as a transmitting electrode or a receiving electrode, and the voltage rolling measurement of any two electrodes is realized through instructions.

[0012] Furthermore, the synchronous timestamp utilizes the RTC peripheral of the single-chip microcomputer to calculate the time of each set of measurement data during measurement. After the data is successfully measured, it is stored or sent together with the timestamp to achieve measurement time synchronization.

[0013] Furthermore, the network data acquisition system is a data transmission system based on the Internet of Things, which uses a 4G / 5G full-network DTU module or a serial server module to build a data transmission system. The field acquisition system is connected to the DTU module or serial server module through the RS232 / 485 serial port. The serial server module uses the 4G / 5G network based on the TCP or UDP network protocol to realize data transmission between the DTU module and the monitoring center server.

[0014] Furthermore, after the data management and inversion system sets up the field acquisition system for planned measurements, the communication control software uses the telemetry link to poll the field acquisition system at set intervals at predetermined time intervals; the data management and inversion system uses two central servers, one of which hosts the database and network application, and also serves as a communication server, running customized control software, automatically contacting the field acquisition system, controlling the upload of measurement plans and the download of measurement data; the other central server serves as an inversion server, running the digital inversion code and receiving work requirements proposed by the other central server.

[0015] A method for monitoring the dynamic time-shift electric field of groundwater in a mine tunnel through a network, the method comprising the following steps:

[0016] A. Arrange the measuring electrodes. According to the distribution of the area to be measured, the control bus is arranged in the area to be measured in a network shape. An electrode module is placed at a certain distance in the target area. The number of electrode modules can be increased or decreased on the bus at will. Each electrode module is connected to the bus, and the transmitting end and the receiving end are connected through the bus.

[0017] B. Determine the transmitting electrode according to the electrode arrangement in the target area, select any two electrodes in the electrode network as transmitting electrodes, and select the measurement method and receiving electrode according to the measurement target.

[0018] C. According to the measurement target, the control program is transmitted to the field acquisition system, and the voltage value rolling measurement of any two electrodes is realized through instructions;

[0019] D. Through the RS485 serial communication line, the collected data is packaged and sent remotely to the remote monitoring center server through the UDP / IP protocol, and the measurement data is received synchronously, based on the information time.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention utilizes resistivity tomography technology to realize an intelligent monitoring network for the dynamic movement of groundwater in mine tunnels, and designs a new intelligent Internet of Things observation instrument for underground resistivity imaging, which can be permanently deployed in mine tunnels. Field measurement and data acquisition address and control electrodes based on information transmitted by UDP / IP protocol and Ethernet, and then the collected data is sent back to a remote PC through UDP / IP protocol and Ethernet again to regularly provide underground resistivity imaging pictures, thereby eliminating the need for manual repeated measurements.

[0022] The present invention selects the transmitting electrode and the measuring electrode through remote program control, and can select and control according to the demand. Through the UDP / IP protocol and Ethernet, the mutual transmission between the application layer protocol interface and the MAC control interface is carried out from the field and the computer. The intelligent monitoring network is used for remote control to collect and transmit data, eliminating the physical line transmission between the data and the computer, and can eliminate the need to bring instruments to the field for measurement, so as to realize the real-time detection and long-term monitoring of the intelligent mine, and avoid affecting the project progress and the occupation of personnel and equipment due to detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a system block diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of bus control and electrode module; DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] See also Figure 1 , a network monitoring system for dynamic time-shift electric field of groundwater in mine tunnels, the system includes: field acquisition system, network data transmission system and data management and inversion system, among which,

[0027] The field acquisition system includes an electrode array module, a transmitting module, an acquisition module and a control module, and the control module controls the selection of power supply electrodes and measuring electrodes of the transmitting module, the acquisition module and the electrode array module;

[0028] The network data transmission system sends the control command to the on-site acquisition system through the UDP / IP protocol and Ethernet; after the acquisition module collects the signal, it is connected to the monitoring center server through the router via the UDP / IP protocol and Ethernet;

[0029] The data management and inversion system is remotely configured via software, acquiring data in real time or on demand every day according to a pre-set schedule, and inverting the data to generate a resistivity model.

[0030] The control module switches the electrode array module according to the received instruction and sends a control signal to the constant voltage source, and the constant voltage source supplies corresponding current to the power supply electrode according to the control signal.

[0031] The transmitting module includes a DC / DC constant voltage source and an inverter. The constant voltage source provides the transmitting current, which is converted into an AC signal through the inverter. The constant voltage source circuit is a DC / DC constant voltage source, and the voltage across the transmitting electrode is monitored in real time to ensure the stability of the power supply.

[0032] See also Figure 2 As shown. The control bus is arranged in a network shape in the mine tunnel, and the electrode module array is connected through the bus. The bus is arranged in the mine tunnel. The electrode module consists of a metal electrode, a non-polarized electrode, a control module and a switch. The metal electrode is used to transmit a large current, and the non-polarized electrode is used to detect the voltage. The switch is controlled by a relay. The control module controls the switch of the relay of this module according to the bus signal. The electrode module is connected to the transmitting module or the acquisition module through the bus, as a transmitting electrode or a receiving electrode, and the voltage rolling measurement of any two electrodes is realized through instructions.

[0033] The synchronous timestamp utilizes the RTC peripheral of the microcontroller to calculate the time of each set of measurement data during measurement. After the data is successfully measured, it is stored or sent together with the timestamp to achieve measurement time synchronization.

[0034] The network data acquisition system is a data transmission system based on the Internet of Things. It uses a 4G / 5G full-network DTU module or a serial server module to build a data transmission system. The field acquisition system is connected to the DTU module or serial server module through the RS232 / 485 serial port. The serial server module uses the 4G / 5G network based on the TCP or UDP network protocol to realize data transmission between the DTU module and the monitoring center server.

[0035] The data management and inversion system processes the collected data and inverts the image. After setting up the field acquisition system and taking measurements, the communication control software uses the telemetry link to poll the field acquisition system at a predetermined time interval at a set interval; the data management and inversion system uses two central servers, one of which hosts the database and network application, and also serves as a communication server, running customized control software, automatically contacting the field acquisition system, controlling the upload of measurement plans and the download of measurement data; the other central server serves as an inversion server, running digital inversion code and receiving work requirements from another central server. In actual work, the commercial software RES2DINV&RES3DINV can be used to invert the data in the folder and generate images.

[0036] After all acquisition and transmission, networked systems are installed, they are designed to operate according to a measurement plan linked to a specific command file. The command file includes relevant geoelectric measurements (resistivity, induced polarization, self-potential, etc.), electrode selection and data acquisition parameters (such as duty cycle, number of stacking times, standard deviation, sampling window, etc.). In addition, the command file contains unique identifiers that allow the measurement results to be uploaded and automatically processed by the data management system. The entire system runs on the UDP / IP protocol and can link up to 100 scheduled events to locally stored command files.

[0037] The field acquisition system of the present invention can be permanently deployed in the mine tunnel. The field measurement and data acquisition are remotely addressed and controlled by the UDP / IP protocol and Ethernet. Then the collected data is sent back to the remote PC through the UDP / IP protocol and Ethernet again, and the data is stored in a file, thereby eliminating the need for manual repeated measurements. Compared with the traditional detection method, the intelligent monitoring network remote control is used to collect and transmit data, eliminating the physical line transmission between the data and the computer. Through the UDP / IP protocol and Ethernet, the application layer protocol interface and the MAC control interface are mutually transmitted, and remote transmission is performed from the field to the computer. It can eliminate the need to bring instruments to the field for measurement, realize intelligent mines and intelligent monitoring, and avoid the impact of detection on the project progress and the occupation of personnel and equipment.

[0038] The method for monitoring the dynamic time-shift electric field of underground water in a mine tunnel according to the present invention comprises the following steps:

[0039] A. Arrange the measuring electrodes. According to the distribution of the area to be measured, the control bus is arranged in the area to be measured in a network shape. An electrode module is placed at a certain distance in the target area. The number of electrode modules can be increased or decreased on the bus at will. Each electrode module is connected to the bus, and the transmitting end and the receiving end are connected through the bus.

[0040] B. Determine the transmitting electrode according to the electrode layout in the target area and the detection requirements, select any two electrodes in the electrode network as transmitting electrodes, and select the measurement method and receiving electrode according to the measurement target.

[0041] C. According to the measurement target, the control program is transmitted to the field acquisition system, and the voltage rolling measurement of any two electrodes is realized through instructions;

[0042] D. Through the RS485 serial communication line, the collected data is packaged and sent remotely to the remote monitoring center server through the UDP / IP protocol, and the measurement data is received synchronously. The synchronization process is based on the information time.

[0043] When arranging electrodes as described in step A, each electrode is controlled by 4 relays, that is, each electrode has a control module, and a control command is transmitted to each electrode through a system bus. Determine the transmitting electrode and the receiving electrode as described in step B, and any electrode can be set to a transmitting electrode or a receiving electrode through the control module of each electrode. Through the control of the program, it is possible to avoid the deviation caused by an electrode itself as both a transmitting electrode and a receiving-level electrode. According to different measurement requirements, in step C, by remote program control, the electrode control command is sent to the field control module, and the single-chip microcomputer gives the electrode instruction through the bus according to the program instruction sent, and switches the transmitting electrode and the measuring electrode according to the remote demand. After the data measurement is completed in step D, the data is packaged and sent to the remote PC through the Internet of Things, and the RTC peripheral of STM32 is used to control the synchronization timestamp.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for monitoring the dynamic time-shift electric field of groundwater in a mine tunnel, characterized in that: The system based on the method includes: a field acquisition system, a network data transmission system and a data management and inversion system, and uses resistivity tomography technology to realize an intelligent monitoring network for the dynamic movement of groundwater in mine tunnels, wherein: The field acquisition system includes an electrode array module, a transmitting module, an acquisition module and a control module, and the control module controls the selection of power supply electrodes and measuring electrodes of the transmitting module, the acquisition module and the electrode array module; The data transmission system sends the control command to the on-site acquisition system through the UDP / IP protocol and Ethernet; after the acquisition module collects the signal, it is connected to the monitoring center server through the router via the UDP / IP protocol and Ethernet; The data management and inversion system is remotely configured through software, and acquires data in real time or on demand every day according to a pre-set schedule, and inverts the data to generate a resistivity model; The control module switches the electrode array module according to the received instructions and sends a control signal to the constant voltage source. The constant voltage source supplies the corresponding current to the power supply electrode according to the control signal. The voltage at both ends of the constant voltage source is monitored in real time. When a deviation occurs, it is automatically adjusted to keep the power supply stable. The transmitting module includes a DC / DC constant voltage source and an inverter, the constant voltage source provides a transmitting current, and the transmitting current is converted into an AC signal through the inverter, wherein the constant voltage source circuit is a DC / DC constant voltage source; The control bus is arranged in a network shape in the mine tunnel, and the electrode module array is connected through the bus. The bus is arranged in the mine tunnel. The electrode module is composed of a metal electrode, a non-polarized electrode, an electrode module control chip and a switch. The metal electrode is used to transmit a large current, and the non-polarized electrode is used to detect the voltage. The switch is controlled by a relay. Each electrode module is controlled by 4 relays. The electrode module control chip controls the switch of the relay of this module according to the bus signal. The electrode module is connected to the transmitting module or the acquisition module through the bus as a transmitting electrode or a receiving electrode, and the voltage rolling measurement of any two electrodes is realized through instructions; The RTC peripheral of the microcontroller is used to calculate the time of each set of measurement data during measurement. After the data is successfully measured, it is stored or sent together with the timestamp to achieve measurement time synchronization; The network data acquisition system is a data transmission system based on the Internet of Things. It uses a 4G / 5G full-network DTU module or a serial server module to build a data transmission system. The field acquisition system is connected to the DTU module or serial server module through the RS232 / 485 serial port. The serial server module uses the 4G / 5G network based on the TCP or UDP network protocol to realize data transmission between the DTU module and the monitoring center server. After the field acquisition system is set up for planned measurements, the communication control software uses the telemetry link to poll the field acquisition system at set intervals; the data management and inversion system uses two central servers, one of which hosts the database and web application and also acts as a communication server, running customized control software, automatically contacting the field acquisition system, controlling the upload of measurement plans and the download of measurement data; the other central server acts as an inversion server, running the digital inversion code and receiving work requests from the other central server; The method comprises the following steps: A. Arrange the measuring electrodes. According to the distribution of the area to be measured, the control bus is arranged in the area to be measured in a network shape. An electrode module is placed at a certain distance in the target area. The number of electrode modules can be increased or decreased on the bus at will. Each electrode module is connected to the bus, and the transmitting end and the receiving end are connected via the bus. B. Determine the transmitting electrode according to the electrode arrangement in the target area, select any two electrodes in the electrode network as transmitting electrodes, and select the measurement method and receiving electrode according to the measurement target; C. According to the measurement target, the control program is transmitted to the field acquisition system, and the voltage value rolling measurement of any two electrodes is realized through instructions; D. Through the RS485 serial communication line, the collected data is packaged and sent remotely to the remote monitoring center server through the UDP / IP protocol, and the measurement data is received synchronously. The synchronization time is based on the information time.

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