Distributed optical fiber prospecting system and method

Abstract

The invention relates to a distributed optical fiber prospecting system and method, and belongs to the technical field of laser detection, the distributed optical fiber prospecting system comprises a laser source module, a distributed optical fiber sensing module and a data processing module which are integrated at one end of a distributed optical fiber, the distributed optical fiber is spirally distributed above an area to be prospected, and the data processing module is connected with the distributed optical fiber sensing module. The laser source module is used for emitting laser signals; the distributed optical fiber sensing module is used for capturing a scattered signal after the laser signal is scattered by a to-be-explored region; and the data processing module is used for analyzing the scattering signals to obtain mineral resource distribution information of the to-be-prospected area. The distributed optical fiber provided by the invention is spirally distributed above an area to be explored, a high-density detection network is formed, and a higher spatial resolution and a more uniform coverage effect are provided, so that detection blind areas are remarkably reduced, and the detection of mineral distribution is more accurate.

Description

Technical Field

[0001] The present invention relates to the field of laser detection technology, and in particular to a distributed optical fiber prospecting system and method. Background Art

[0002] In recent years, with the continuous growth of demand for mineral resources, resource exploration technology faces higher depth and precision requirements. Although traditional seismic detection technology has played an important role in resource exploration, it still has limitations such as insufficient coverage, limited deep detection capability, poor environmental adaptability, lack of real-time and intelligence, and difficulty in achieving real-time data collection.

[0003] Distributed fiber optic sensing technology has shown great potential in mineral exploration due to its advantages such as extremely high sensitivity and accuracy, resistance to electromagnetic interference, good inherent safety, high insulation strength, corrosion resistance, integration of sensing and transmission, and compatibility with digital communication systems. Existing fiber optic sensing systems mostly adopt a linear layout, which can only realize detection directly below the fiber optic layout area. The detection area is a plane, and the lateral detection capability of the fiber optic layout area is weak, and it cannot fully meet the needs of refined detection under complex geological conditions.

[0004] This shows that the existing distributed fiber optic sensing technology cannot meet the current sophisticated detection needs. Summary of the invention

[0005] In view of this, it is necessary to provide a distributed optical fiber prospecting system and method to solve the problem that the existing distributed optical fiber sensing technology cannot meet the current refined detection needs.

[0006] In order to solve the above problems, the present invention provides a distributed optical fiber prospecting system, including a laser source module integrated at one end of a distributed optical fiber, a distributed optical fiber sensing module and a data processing module. The distributed optical fiber is spirally distributed above the prospecting area. The laser source module is used to emit laser signals, and the laser signals propagate along the distributed optical fiber; The distributed optical fiber sensing module is used to capture the scattered signal of the laser signal after it is scattered by the prospecting area; The data processing module is used to analyze the scattered signals to obtain the mineral distribution information of the area to be explored.

[0007] In a possible implementation, the distributed optical fiber is buried within a preset depth range below the ground in the area to be explored, and the helical angle and distribution density of the distributed optical fiber are determined according to the geological conditions of the area to be explored.

[0008] In a possible implementation, the laser source module includes a tunable laser, which is used to emit a laser signal of a specific wavelength according to a preset laser signal requirement.

[0009] In one possible embodiment, the distributed fiber optic sensing module includes a high-sensitivity distributed fiber optic sensor, which is arranged in a spiral shape to cover the area to be explored and is used to collect scattered signals after the laser signal is scattered in the area to be explored when it propagates along the distributed optical fiber.

[0010] In a possible implementation, the data processing module includes a laser signal demodulation device, a signal amplification module and a signal processing module. The laser signal demodulation device is used to demodulate the scattered signal to obtain the vibration signal, strain signal and temperature signal; The signal amplification module is used to amplify vibration signals, strain signals and temperature signals; The signal processing module is used to process the amplified vibration signal, strain signal and temperature signal to obtain the mineral distribution information of the area to be explored.

[0011] In a possible implementation, the laser signal demodulation device is a Brillouin demodulator or a Raman scattering demodulator.

[0012] In a possible implementation, the distributed optical fiber prospecting system further includes a data transmission module and a control center. The data transmission module is used to transmit the detection data to the control center through wireless and / or wired communication, and the control center is used to display the detection data in real time.

[0013] The present invention also provides a distributed optical fiber prospecting method, applicable to the distributed optical fiber prospecting system of any of the above embodiments, comprising: The distributed optical fiber sensors which are spirally distributed above the prospecting area collect the scattered signals of the laser signal after being scattered by the prospecting area; The scattered signals are analyzed to obtain the mineral distribution information of the area to be explored.

[0014] In a possible implementation, analyzing the scattered signals to obtain the mineral distribution information of the area to be explored includes: The scattered signal is demodulated by a laser signal demodulation device to obtain vibration signal, strain signal and temperature signal; The vibration signal, strain signal and temperature signal are analyzed to obtain the mineral distribution information of the area to be explored.

[0015] In a possible implementation, the vibration signal, the strain signal and the temperature signal are analyzed to obtain the mineral distribution information of the area to be explored, including: A three-dimensional structural diagram and a mineral distribution model of the area to be explored are constructed based on vibration signals, strain signals and temperature signals, and the mineral distribution information of the area to be explored is displayed in combination with the three-dimensional structural diagram and the mineral distribution model.

[0016] The beneficial effects of the present invention are as follows: the distributed optical fiber prospecting system provided by the present invention comprises a laser source module, a distributed optical fiber sensing module and a data processing module integrated at one end of a distributed optical fiber, and the distributed optical fiber is spirally distributed above the area to be prospected, forming a high-density detection network, providing higher spatial resolution and more uniform coverage, thereby significantly reducing detection blind spots, and the integrated distributed laser source module, distributed optical fiber sensing module and data processing module are less affected by the external environment, and the detection of mineral distribution is more accurate, which can meet the current refined detection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of a distributed optical fiber prospecting system provided by an embodiment of the present invention; Figure 2 A distributed optical fiber sensor arrangement diagram provided by an embodiment of the present invention; Figure 3 A schematic diagram of a process flow of a distributed optical fiber prospecting method provided by an embodiment of the present invention; Figure 4 A flowchart of an implementation method of S302 provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0020] In the description of the embodiments of the present invention, unless otherwise specified, "multiple" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: A exists alone, A and B exist at the same time, and B exists alone.

[0021] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] Distributed fiber optic sensing technology has shown great potential in mineral exploration due to its advantages such as extremely high sensitivity and accuracy, anti-electromagnetic interference, good inherent safety, high insulation strength, corrosion resistance, integration of sensing and transmission, and compatibility with digital communication systems. Existing fiber optic sensing systems mostly adopt linear layout, which can only realize detection directly below the fiber optic layout area. The detection area is a plane, and the lateral detection ability of the fiber optic layout area is weak, and it cannot fully meet the refined detection needs under complex geological conditions. Based on this, Figure 1 As shown, one embodiment of the present invention discloses a distributed optical fiber prospecting system, including a laser source module 101 integrated at one end of a distributed optical fiber, a distributed optical fiber sensing module 102 and a data processing module 103, wherein the distributed optical fiber is spirally distributed above the prospecting area. The laser source module is used to emit laser signals, and the laser signals propagate along the distributed optical fiber; The distributed optical fiber sensing module is used to capture the scattered signal of the laser signal after it is scattered by the prospecting area; The data processing module is used to analyze the scattered signals to obtain the mineral distribution information of the area to be explored.

[0023] In an embodiment of the present invention, a distributed optical fiber prospecting system is provided for detecting mineral resources in an area to be prospected, and includes a laser source module, a distributed optical fiber sensing module, and a data processing module integrated at one end of a distributed optical fiber. The laser source module, the distributed optical fiber sensing module, and the data processing module are integrated as one and arranged at the head end of the distributed optical fiber. The laser source module is used to emit a laser signal, and the laser signal propagates along the distributed optical fiber. During the propagation process, the laser signal is transmitted along the spirally distributed optical fiber to the area to be prospected, and forms a scattered signal after being scattered in the area to be prospected. The distributed optical fiber sensing module is arranged in the distributed optical fiber to collect the scattered signal, and the data processing module is used to analyze the scattered signal to obtain mineral distribution information of the area to be prospected.

[0024] The distributed optical fiber prospecting system provided by the present invention includes a laser source module, a distributed optical fiber sensing module and a data processing module integrated at one end of a distributed optical fiber, and the distributed optical fiber is spirally distributed above the area to be prospected to form a high-density detection network, which provides higher spatial resolution and more uniform coverage, thereby significantly reducing detection blind spots. The integrated distributed laser source module, distributed optical fiber sensing module and data processing module are less affected by the external environment, and the detection of mineral distribution is more accurate, which can meet the current refined detection needs.

[0025] As a possible implementation of the present invention, in this implementation, the distributed optical fiber is buried within a preset depth range below the ground of the area to be explored, and the helical angle and distribution density of the distributed optical fiber are determined according to the geological conditions of the area to be explored.

[0026] In the embodiment of the present invention, Figure 2 As shown, the distributed optical fiber is buried within a preset depth range below the ground of the area to be explored. Specifically, a trench about 10 to 30 cm deep can be dug in the ground of the area to be explored and the optical fiber sensing units can be buried and arranged in a spiral shape. The optical fibers are arranged in a spiral shape in the area to be explored at a preset spacing (3 to 10 meters). By adjusting the spiral angle and density, it can adapt to different geological conditions (such as loose soil layers, rock structures or underwater environments).

[0027] Furthermore, the laser source module includes a tunable laser for emitting a laser signal of a specific wavelength according to a preset laser signal requirement.

[0028] In an embodiment of the present invention, the laser source module adopts a tunable laser to ensure the high stability and long-distance transmission capability of the laser signal. The tunable laser supports single wavelength or multi-wavelength mode operation to meet the detection requirements of different depths and regions. The laser source module is connected to the head end of the optical fiber sensor module, and can drive multiple optical fiber networks at the same time through a splitter to improve signal acquisition efficiency. Furthermore, the tunable laser can emit a laser signal of a specific wavelength according to actual prospecting needs. For example, if the mineral deposits in the area to be explored are deep and the laser signal needs to have a strong penetrating ability, a laser signal with a shorter wavelength can be emitted. If the mineral deposits in the area to be explored are wide, a laser signal with a longer wavelength can be emitted. The specific setting can be based on actual conditions, and the present invention does not limit this.

[0029] As a possible embodiment of the present invention, in this embodiment, the distributed optical fiber sensing module includes a high-sensitivity distributed optical fiber sensor, which is arranged in a spiral shape to cover the area to be explored, and is used to collect scattered signals after the laser signal is scattered in the area to be explored when it propagates along the distributed optical fiber.

[0030] In an embodiment of the present invention, the distributed optical fiber sensing module includes a high-sensitivity distributed optical fiber sensor, which is prepared based on high-temperature resistant and corrosion-resistant materials (such as metal-coated or special polymer cladding). The optical fiber is arranged in a spiral shape at a preset spacing in the target detection area, and vibration, strain and temperature signals can be collected simultaneously, supporting the joint detection of multiple physical quantities. Optionally, the high-sensitivity distributed optical fiber sensors are arranged in a spiral shape at a preset spacing (such as 3 meters to 10 meters), which can flexibly adapt to different environments such as the surface, boreholes or underwater. A trench of about 10 to 30 cm is dug on the ground in the mining area to bury the high-sensitivity distributed optical fiber sensor. The arrangement density and spiral angle can be adjusted according to the geological characteristics of the target area, and are used to collect the scattered signal of the laser signal after it is scattered by the area to be explored when it propagates along the distributed optical fiber.

[0031] Furthermore, the data processing module includes a laser signal demodulation device, a signal amplification module and a signal processing module. The laser signal demodulation device is used to demodulate the scattered signal to obtain the vibration signal, strain signal and temperature signal; The signal amplification module is used to amplify vibration signals, strain signals and temperature signals; The signal processing module is used to process the amplified vibration signal, strain signal and temperature signal to obtain the mineral distribution information of the area to be explored.

[0032] In an embodiment of the present invention, the data processing module includes a laser signal demodulation device, a signal amplification module and a signal processing module. The laser demodulation device can demodulate the scattered signal to obtain a vibration signal, a strain signal and a temperature signal. The signal amplification module is used to amplify the vibration signal, the strain signal and the temperature signal. The signal processing module is used to process the amplified vibration signal, the strain signal and the temperature signal to obtain the mineral distribution information of the area to be explored. Specifically, when the signal processing module processes the amplified vibration signal, the strain signal and the temperature signal, it can combine the artificial intelligence algorithm to automatically analyze these detection data, perform three-dimensional modeling and abnormal signal recognition, and generate a three-dimensional model of mineral distribution.

[0033] Optionally, the laser signal demodulation device is a Brillouin demodulator or a Raman scattering demodulator.

[0034] Furthermore, the distributed optical fiber prospecting system also includes a data transmission module and a control center. The data transmission module is used to transmit the detection data to the control center through wireless and / or wired communication, and the control center is used to display the detection data in real time.

[0035] In an embodiment of the present invention, the monitoring center is used to display and monitor the detection data of the distributed optical fiber prospecting system. The data transmission module of the distributed optical fiber prospecting system can transmit the detection data to the control center via wireless and / or wired communication. The detection data includes but is not limited to laser signals, scattering signals, vibration signals, temperature signals, strain signals, and mineral area location, mineral type, mineral detection results, etc. After receiving the detection data, the control center can selectively display and monitor the detection data.

[0036] The distributed optical fiber prospecting system provided by the present invention includes a laser source module, a distributed optical fiber sensing module and a data processing module integrated at one end of a distributed optical fiber, and the distributed optical fiber is spirally distributed above the area to be prospected to form a high-density detection network, which provides higher spatial resolution and more uniform coverage, thereby significantly reducing detection blind spots. The integrated distributed laser source module, distributed optical fiber sensing module and data processing module are less affected by the external environment, and the detection of mineral distribution is more accurate, which can meet the current refined detection needs.

[0037] The present invention also provides a distributed optical fiber prospecting method, such as Figure 3 As shown, a distributed optical fiber prospecting system applicable to any of the above embodiments includes: S301, collecting scattered signals of laser signals after being scattered by the area to be explored by using distributed optical fiber sensors that are spirally distributed above the area to be explored; S302, analyzing the scattered signals to obtain the mineral distribution information of the area to be explored.

[0038] In the embodiment of the present invention, the distributed optical fiber sensor is spirally distributed above the area to be explored. The distributed optical fiber sensor can collect the scattered signal of the laser signal after being scattered by the area to be explored, and then analyze the scattered signal to obtain the mineral distribution information of the area to be explored. The distributed optical fiber is spirally distributed above the area to be explored to form a high-density detection network, which provides higher spatial resolution and more uniform coverage, thereby significantly reducing the detection blind area and achieving better detection effect on the area to be explored.

[0039] Optional, such as Figure 4 As shown, the scattered signals are analyzed to obtain the mineral distribution information of the prospecting area, including: S401, demodulating the scattered signal using a laser signal demodulation device to obtain a vibration signal, a strain signal, and a temperature signal; S402, analyzing the vibration signal, strain signal and temperature signal to obtain mineral distribution information of the area to be explored.

[0040] In an embodiment of the present invention, the scattered signal collected by the optical fiber is transmitted to the demodulator. The optical signal demodulator (Brillouin demodulator or Raman demodulator) can be used to extract the strain, vibration and temperature information in the scattered signal, and perform distributed data demodulation on these signals. The demodulated data is filtered, feature extracted and pattern recognized by the signal processor. Combined with the pre-input geological model, the system automatically generates an underground three-dimensional structure map and a mineral distribution model.

[0041] Specifically, the vibration signal, strain signal and temperature signal are analyzed to obtain the mineral distribution information of the prospecting area, including: A three-dimensional structural diagram and a mineral distribution model of the area to be explored are constructed based on vibration signals, strain signals and temperature signals, and the mineral distribution information of the area to be explored is displayed in combination with the three-dimensional structural diagram and the mineral distribution model.

[0042] In an embodiment of the present invention, based on the intelligent algorithm integrated in the data processing module and in combination with a pre-set address model of the area to be explored, a three-dimensional structural diagram and a mineral distribution model of the area to be explored can be constructed based on vibration signals, strain signals and temperature signals. Furthermore, the mineral distribution model can be displayed in the three-dimensional structural diagram of the area to be explored to display the mineral distribution information of the area to be explored, which may include the mineral type, mineral depth, mineral quantity, etc. of the area to be explored.

[0043] The distributed optical fiber prospecting method provided by the present invention collects scattered signals of laser signals after being scattered by the area to be explored through distributed optical fiber sensors distributed in a spiral shape above the area to be explored. The distributed optical fiber is distributed in a spiral shape above the area to be explored to form a high-density detection network, which provides higher spatial resolution and more uniform coverage, thereby significantly reducing detection blind spots and achieving better detection effects on the area to be explored.

[0044] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A distributed optical fiber prospecting system, characterized in that: It includes a laser source module, a distributed optical fiber sensing module and a data processing module integrated at one end of a distributed optical fiber. The distributed optical fiber is spirally distributed above the area to be explored. The laser source module is used to emit a laser signal, and the laser signal propagates along the distributed optical fiber; The distributed optical fiber sensing module is used to capture the scattered signal of the laser signal after being scattered by the area to be explored; The data processing module is used to analyze the scattered signal to obtain the mineral distribution information of the area to be explored.

2. The distributed optical fiber prospecting system according to claim 1, characterized in that: The distributed optical fiber is buried within a preset depth range below the ground of the area to be explored, and the helical angle and distribution density of the distributed optical fiber are determined according to the geological conditions of the area to be explored.

3. The distributed optical fiber prospecting system according to claim 1, characterized in that: The laser source module includes a tunable laser, which is used to emit a laser signal of a specific wavelength according to a preset laser signal requirement.

4. The distributed optical fiber prospecting system according to claim 1, characterized in that: The distributed optical fiber sensing module includes a high-sensitivity distributed optical fiber sensor, which is arranged in a spiral shape to cover the area to be explored and is used to collect scattered signals after the laser signal is scattered by the area to be explored when it propagates along the distributed optical fiber.

5. The distributed optical fiber prospecting system according to claim 1, characterized in that: The data processing module includes a laser signal demodulation device, a signal amplification module and a signal processing module. The laser signal demodulation device is used to demodulate the scattered signal to obtain a vibration signal, a strain signal and a temperature signal; The signal amplification module is used to amplify the vibration signal, strain signal and temperature signal; The signal processing module is used to process the amplified vibration signal, strain signal and temperature signal to obtain mineral distribution information of the area to be explored.

6. The distributed optical fiber prospecting system according to claim 5, characterized in that: The laser signal demodulation device is a Brillouin demodulator or a Raman scattering demodulator.

7. The distributed optical fiber prospecting system according to claim 1, characterized in that: The distributed optical fiber prospecting system also includes a data transmission module and a control center. The data transmission module is used to transmit the detection data to the control center via wireless and / or wired communication, and the control center is used to display the detection data in real time.

8. A distributed optical fiber prospecting method, characterized in that: A distributed optical fiber prospecting system applicable to any one of claims 1 to 7, comprising: The distributed optical fiber sensors which are spirally distributed above the area to be explored collect scattered signals of the laser signal after being scattered by the area to be explored; The scattered signals are analyzed to obtain the mineral distribution information of the area to be explored.

9. The distributed optical fiber prospecting method according to claim 8, characterized in that: The analyzing the scattered signal to obtain the mineral distribution information of the area to be explored includes: Demodulating the scattered signal using a laser signal demodulation device to obtain a vibration signal, a strain signal and a temperature signal; The vibration signal, strain signal and temperature signal are analyzed to obtain the mineral distribution information of the area to be explored.

10. The distributed optical fiber prospecting method according to claim 8, characterized in that: The analyzing of the vibration signal, strain signal and temperature signal to obtain the mineral distribution information of the area to be explored includes: A three-dimensional structural diagram and a mineral distribution model of the area to be explored are constructed based on the vibration signal, strain signal and temperature signal, and the mineral distribution information of the area to be explored is displayed in combination with the three-dimensional structural diagram and the mineral distribution model.

Images