A real-time image generation system for geological exploration based on real-time data

Abstract

The application discloses a geological exploration real-time image generation system based on real-time data, which comprises a ground acquisition device, a data integration device and a data processing device.The ground acquisition device is used for acquiring a ground natural electromagnetic pulse signal.The data integration device is used for integrating the ground natural electromagnetic pulse signal into a ground data packet.The data processing device is used for acquiring the ground natural electromagnetic pulse signal in the ground data packet, performing signal estimation on the ground natural electromagnetic pulse signal and historical signal data, obtaining an aerial natural electromagnetic pulse estimation signal, and generating a corresponding geological survey image according to the aerial natural electromagnetic pulse estimation signal.The aerial natural electromagnetic pulse signal acquired by an aerial acquisition device is used as the historical signal data, and the aerial natural electromagnetic pulse signal is estimated by using the ground natural electromagnetic pulse signal and the historical signal data, so that the aerial acquisition device does not need to frequently take off and land, the real-time performance of the geological survey image is improved, and operation cost is reduced.

Description

Technical Field

[0001] This application relates to the field of geological exploration technology, and in particular to a real-time image generation system for geological exploration based on real-time data. Background Technology

[0002] Natural electromagnetic pulse (NEMV) exploration technology is a new exploration technology that has emerged in recent years. By collecting and processing weak electromagnetic pulse signals generated by the natural environment, it can assess the geological environment or geological hazards and even predict them in advance, which has been well received by geological exploration personnel.

[0003] To further improve the efficiency of geological exploration, many explorers are now using unmanned aerial vehicles (UAVs) to carry data acquisition equipment to collect natural electromagnetic pulse signals. For example, CN115755196A discloses a horizontal twelve-component natural electromagnetic pulse signal receiving device and storage medium, which uses an UAV to carry a signal receiving antenna with a horizontal twelve-component to collect natural electromagnetic pulse signals. The natural electromagnetic pulse signals are then sent to the cloud via the Internet for data processing and image generation.

[0004] However, the aforementioned patents require launching a large number of unmanned aerial vehicles (UAVs) each time to collect natural electromagnetic pulse (EMP) signals. There is a time interval between UAV takeoff and the start of EMP signal collection, resulting in a relatively long operation time and reduced real-time image generation. Furthermore, frequent UAV takeoffs and landings consume more maintenance resources, leading to higher costs. Summary of the Invention

[0005] This application provides a real-time image generation system for geological exploration based on real-time data, which solves the problems of poor real-time performance and high cost in the prior art of frequently using unmanned aerial vehicles to collect natural electromagnetic pulse signals.

[0006] On one hand, embodiments of this application provide a real-time geological exploration image generation system based on real-time data, including:

[0007] The ground acquisition device is set on the ground in the exploration area and is used to collect natural electromagnetic pulse signals from the ground.

[0008] A data integration device is used to receive terrestrial natural electromagnetic pulse signals and integrate them into terrestrial data packets.

[0009] The data processing device is used to receive ground data packets. After acquiring the ground natural electromagnetic pulse signal in the ground data packet, the data processing device combines historical signal data and the ground natural electromagnetic pulse signal to perform signal estimation, obtain the airborne natural electromagnetic pulse estimation signal, and then generate the corresponding geological survey image based on the airborne natural electromagnetic pulse estimation signal.

[0010] The real-time geological exploration image generation system based on real-time data disclosed in this application has the following advantages:

[0011] After the aerial acquisition device completes the acquisition of an aerial natural electromagnetic pulse signal, the aerial natural electromagnetic pulse signal is used as historical signal data. The ground acquisition device can perform multiple acquisition operations and combine the acquired ground natural electromagnetic pulse signals with historical signal data to estimate the signal. The aerial natural electromagnetic pulse signal is estimated using the ground natural electromagnetic pulse signal. Therefore, the aerial acquisition device does not need to take off and land frequently, which not only improves the real-time performance of geological survey images, but also reduces operating costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram illustrating the composition of a real-time image generation system for geological exploration based on real-time data, provided in an embodiment of this application.

[0014] The reference numerals are as follows: 100 - Ground acquisition device, 200 - Aerial acquisition device, 300 - Data integration device, 400 - Data processing device. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] Figure 1 This is a schematic diagram illustrating the composition of a real-time geological exploration image generation system based on real-time data, provided in an embodiment of this application. This embodiment of the application provides a real-time geological exploration image generation system based on real-time data, comprising:

[0017] The ground acquisition device 100 is set on the ground in the exploration area and is used to acquire natural electromagnetic pulse signals from the ground.

[0018] The data integration device 300 is used to receive ground-based natural electromagnetic pulse signals and integrate the ground-based natural electromagnetic pulse signals into ground data packets.

[0019] The data processing device 400 is used to receive ground data packets. After acquiring the ground natural electromagnetic pulse signal in the ground data packet, the data processing device 400 combines historical signal data and the ground natural electromagnetic pulse signal to perform signal estimation, obtain the airborne natural electromagnetic pulse estimation signal, and then generate the corresponding geological survey image based on the airborne natural electromagnetic pulse estimation signal.

[0020] Exemplarily, the ground acquisition device 100 mainly includes a ground acquisition sensor and a collection and transmission device. The ground acquisition device 100 is entirely buried underground, with the ground acquisition sensor located below the collection and transmission device. The ground acquisition sensor collects natural electromagnetic pulse signals from underground, while the collection and transmission device samples the natural electromagnetic pulse signals collected by the ground acquisition sensor and transmits them to the data integration device 300. It should be understood that the ground acquisition device 100 can be set up at multiple locations in the exploration area as needed to collect natural electromagnetic pulse signals from the ground in real time.

[0021] The data integration device 300 can be installed in the exploration area to integrate the natural electromagnetic pulse signals collected by multiple ground acquisition devices 100 into a unified ground data packet. In the embodiments of this application, there are multiple data integration devices 300, the number of which may be less than or equal to the number of ground acquisition devices 100. Therefore, each data integration device 300 needs to integrate the natural electromagnetic pulse signals collected by at least one ground acquisition device 100. Furthermore, since both the ground acquisition devices 100 and the data integration device 300 are located on the ground, their positions are relatively fixed. During data transmission, data cables can be used to connect the ground acquisition devices 100 and the data integration device 300 for communication. Therefore, the natural electromagnetic pulse signals collected by the ground acquisition devices 100 can be transmitted to the data integration device 300 through a wired network, thereby establishing a fixed correspondence between each ground acquisition device 100 and the data integration device 300.

[0022] Since there are multiple ground acquisition devices 100 and data integration devices 300 in this application, and the ground acquisition device 100 acquires ground natural electromagnetic pulse signals simultaneously, the multiple data integration devices 300 in this application will receive different ground natural electromagnetic pulse signals at the same time. In order to improve the efficiency of data transmission, after the multiple data integration devices 300 receive the ground natural electromagnetic pulse signals and integrate them into ground data packets, they will use parallel transmission to synchronously send these ground data packets to the data processing device 400.

[0023] The data processing device 400 can be set up in a data center far away from the exploration area. Since the distance between the data integration device 300 and the data processing device 400 is far and the environment of the exploration area is relatively harsh, it is preferable to use a wireless network to realize the communication connection between the data integration device 300 and the data processing device 400. This wireless network is based on the Internet, so there is no need to establish a dedicated communication network, thus reducing the cost of data transmission.

[0024] After receiving a ground data packet, the data processing device 400 first parses the data packet to obtain the ground natural electromagnetic pulse (EMIP) signal. Then, it reads historical signal data stored in the storage unit and combines the historical signal data with the ground EMIP signal to estimate the EMIP signal in the airspace of the exploration area, thereby obtaining an estimated EMIP signal. The data processing device 400 can then generate a corresponding geological survey image based on the estimated EMIP signal. In this embodiment, after acquiring the ground EMIP signal, the data processing device 400 can also display relevant attributes of the ground EMIP signal to the operator, such as the EMIP curve and location information. Further processing of these attribute information can yield a geological survey image in the form of a planar map.

[0025] Specifically, the historical signal data refers to the natural electromagnetic pulse signals collected in the air in the exploration area. The historical signal data can be collected synchronously with the natural electromagnetic pulse signals on the ground during a certain acquisition operation. After the synchronous acquisition operation is completed, the data processing device 400 will not need to perform signal estimation and can directly use the historical signal data obtained in this acquisition to generate geological survey images. In subsequent operations, only the ground acquisition device 100 can work. At this time, it is necessary to combine the natural electromagnetic pulse signals on the ground and the historical signal data to perform signal estimation.

[0026] During signal estimation, since the geological signals in the exploration area do not change significantly in a short period of time, the difference between historical signal data and simultaneously acquired ground natural electromagnetic pulse signals at the same moment can be determined. Then, in subsequent signal estimation, the estimated airborne natural electromagnetic pulse signal can be determined based on this difference and the reacquired ground natural electromagnetic pulse signal.

[0027] In one possible embodiment, the system may further include: an aerial acquisition device 200 for acquiring aerial natural electromagnetic pulse signals in the exploration area, the historical signal data being the aerial natural electromagnetic pulse signal acquired by the aerial acquisition device 200 in the last acquisition; while the aerial acquisition device 200 is acquiring the aerial natural electromagnetic pulse signal, the ground acquisition device 100 is also acquiring the ground natural electromagnetic pulse signal; a data integration device 300 integrates the simultaneously acquired aerial natural electromagnetic pulse signal and the ground natural electromagnetic pulse signal into a joint data packet; and a data processing device 400, after acquiring the joint data packet, generates a corresponding geological survey image based on the aerial natural electromagnetic pulse signal in the joint data packet.

[0028] For example, the aerial acquisition device 200 can consist of an unmanned aerial vehicle (UAV) and an aerial acquisition antenna mounted on the bottom of the UAV. The aerial acquisition device 200 can fly automatically to a fixed acquisition point or be controlled by ground operators. During flight, the aerial acquisition device 200 can acquire aerial electromagnetic pulse (EMI) signals at short time intervals, such as once per second. The latitude and longitude of the aerial acquisition device 200 at each acquisition point constitute the acquisition point, and these acquisition points must include at least one point with the same latitude and longitude as the ground acquisition device 100. That is, the aerial acquisition device 200 needs to acquire EMI signals directly above each ground acquisition device 100. After the aerial acquisition device 200 acquires the EMI signals at the fixed acquisition point, it can immediately transmit the EMI signals to the ground-based data integration device 300 via a wireless network. Upon receiving the EMI signals and the simultaneously acquired ground-based EMI signals, the data integration device 300 integrates them into a combined data packet and sends the combined data packet to the data processing device 400 via the wireless internet.

[0029] Furthermore, the number of aerial acquisition devices 200 can also be multiple, capable of acquiring natural electromagnetic pulse signals that cannot be acquired by ground acquisition devices 100. Simultaneously, the aerial acquisition devices 200 need to be assigned acquisition points before takeoff. During each acquisition operation, the same aerial acquisition device 200 can be assigned to different acquisition points, but it must be ensured that each acquisition point is assigned to one aerial acquisition device 200. Once assigned a acquisition point, the aerial acquisition device 200 takes off to that acquisition point and begins acquisition work. The acquisition points in this application include target acquisition points and transit acquisition points. Target acquisition points are the points that the aerial acquisition device 200 needs to pass through after takeoff; the pre-takeoff allocation involves assigning target acquisition points. Transit acquisition points are points other than target acquisition points that the aerial acquisition device 200 collects aerial natural electromagnetic pulse signals at set time intervals during flight.

[0030] After acquiring the airborne electromagnetic pulse signal, the airborne acquisition device 200 can send the airborne electromagnetic pulse signal to the nearest data integration device 300 according to the principle of proximity. Since the data integration devices 300 are not necessarily evenly distributed in the exploration area, there may be a situation where a certain data integration device 300 receives airborne electromagnetic pulse signals sent by multiple airborne acquisition devices 200 at the same time, while a certain data integration device 300 does not receive airborne electromagnetic pulse signals.

[0031] Simultaneously, after the data integration device 300 integrates the combined data packet, it also sends the combined data packet to the data processing device 400 in parallel. When the aerial acquisition device 200 passes directly above a ground acquisition device 100 (i.e., their latitude and longitude are the same and the aerial acquisition device 200 has acquired the aerial electromagnetic pulse signal at that location), the ground acquisition device 100 will also simultaneously acquire the ground electromagnetic pulse signal at that location. When the aerial acquisition device 200 acquires the aerial electromagnetic pulse signal sequentially according to the acquisition points, the arrival time at each acquisition point will differ, resulting in multiple aerial electromagnetic pulse signals not being acquired simultaneously. To ensure synchronization between the aerial and ground electromagnetic pulse signals, each ground acquisition device 100 only acquires the ground electromagnetic pulse signal when the aerial acquisition device 200 is directly overhead, rather than acquiring ground electromagnetic pulse signals from all locations simultaneously. However, when the aerial acquisition device 200 is not operating, the ground acquisition device 100 can acquire ground electromagnetic pulse signals from all locations simultaneously.

[0032] The purpose of estimating the airborne electromagnetic pulse (EMI) signal from the ground-based EMI signal is to provide a data foundation for generating geological survey images even when the airborne acquisition device 200 is not operational. Therefore, after each acquisition of the airborne EMI signal as historical signal data by the airborne acquisition device 200, accurate geological survey images can be generated solely based on the airborne EMI signals from each acquisition point, without relying on the ground-based EMI signal. However, to determine the difference between the ground-based and airborne EMI signals at the same location, the ground-based EMI signals acquired synchronously with the airborne EMI signals still need to be retained. After determining the difference at each location, and completing the next acquisition of the ground-based EMI signal, the airborne EMI signals directly above each ground acquisition device 100 can be estimated based on the ground-based EMI signal and the difference. Geological survey images can also be generated using multiple estimated airborne EMI signals.

[0033] Furthermore, since the number of ground acquisition devices 100 is not large, far fewer than the number of acquisition points when the aerial acquisition device 200 acquires aerial natural electromagnetic pulse signals, if only the estimated aerial natural electromagnetic pulse signals above the ground acquisition device 100 are used to generate geological survey images, the image accuracy will be severely reduced due to insufficient data. To improve accuracy, this application also uses interpolation to generate data between two adjacent estimated aerial natural electromagnetic pulse signals after obtaining the estimated aerial natural electromagnetic pulse signals above the ground acquisition device 100. The interpolation points need to match the positions of the acquisition points along the way, so that the number of estimated aerial natural electromagnetic pulse signals after interpolation is the same as the number of aerial natural electromagnetic pulse signals directly acquired by the aerial acquisition device 200.

[0034] In one possible embodiment, the ground acquisition device 100 acquires ground-based natural electromagnetic pulse signals at set time intervals. When the ground acquisition device 100 has acquired a set number of signals, the airborne acquisition device 200 takes off and acquires airborne natural electromagnetic pulse signals.

[0035] For example, during the initial operation of the system, the aerial acquisition device 200 can be controlled to take off. Once each aerial acquisition device 200 reaches a predetermined acquisition point, the ground acquisition device 100 and the aerial acquisition device 200 simultaneously acquire ground-based and aerial natural electromagnetic pulse (EMI) signals. In subsequent operations, the aerial acquisition device 200 does not need to take off frequently; only the ground acquisition device 100 needs to acquire ground-based EMI signals. After the ground acquisition device 100 has performed multiple acquisitions, a considerable amount of time has passed, and the EMI signals in the exploration area may have changed significantly. If older aerial EMI signals are still used as historical data, the estimated EMI signal will be significantly inaccurate. Therefore, after the ground acquisition device 100 has operated independently a certain number of times, the aerial acquisition device 200 needs to take off again and acquire EMI signals. Once new EMI signals are acquired, the data processing device 400 will update the stored historical signal data.

[0036] In one possible embodiment, the ground acquisition device 100 acquires ground natural electromagnetic pulse signals at set time intervals, and the air acquisition device 200 also acquires air natural electromagnetic pulse signals at set time intervals. The acquisition time interval of the air acquisition device 200 is an integer multiple of the acquisition time interval of the ground acquisition device 100.

[0037] For example, similar to the above-mentioned method of using a fixed number of data acquisitions, this application can also control the aerial data acquisition device 200 to take off and acquire aerial natural electromagnetic pulse signals according to a set time interval, so as to improve the accuracy of signal estimation. Since the aerial data acquisition device 200 needs to maintain synchronization with the ground data acquisition device 100 during operation, the acquisition time interval of the aerial data acquisition device 200 is at least twice the acquisition time interval of the ground data acquisition device 100, that is, the aerial data acquisition device 200 needs to take off only after the ground data acquisition device 100 has operated independently at least once.

[0038] In one possible embodiment, the data integration device 300 preprocesses the ground-based natural electromagnetic pulse signal and the airborne natural electromagnetic pulse signal, and then integrates the preprocessed ground-based natural electromagnetic pulse signal and the airborne natural electromagnetic pulse signal.

[0039] For example, the data integration device 300 preprocesses ground-based and airborne natural electromagnetic pulse signals, including the removal of invalid signals and the filling of missing signals.

[0040] In one possible embodiment, the data processing device 400 processes the combined data packets sent by the data integration device 300 in a parallel processing manner to obtain real-time geological survey images.

[0041] For example, the natural electromagnetic pulse signal collected by each ground acquisition device 100 or each aerial acquisition device 200 can only reflect the profile of the exploration area on one survey line. When multiple ground acquisition devices 100 and multiple aerial acquisition devices 200 work simultaneously, the data processing device 400 can simultaneously acquire profile data on multiple survey lines. Therefore, in order to improve the generation efficiency of geological survey images, the data processing device 400 in this application adopts a multi-threaded parallel processing method to synchronously process the profile data on multiple survey lines.

[0042] In one possible embodiment, after acquiring the ground-based natural electromagnetic pulse signal and the airborne natural electromagnetic pulse signal, the ground acquisition device 100 and the airborne acquisition device 200 respectively perform signal conditioning on the ground-based natural electromagnetic pulse signal and the airborne natural electromagnetic pulse signal.

[0043] For example, the natural electromagnetic pulse signals acquired by the ground acquisition device 100 and the air acquisition device 200 are both analog signals. In order for these signals to be properly processed by the data integration device 300 and the data processing device 400, the ground acquisition device 100 and the air acquisition device 200 in this application need to perform signal conditioning, including amplification, filtering and analog-to-digital conversion, on the ground natural electromagnetic pulse signals and the air natural electromagnetic pulse signals respectively, so as to improve the quality of the natural electromagnetic pulse signals.

[0044] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0045] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A real-time image generation system for geological exploration based on real-time data, characterized in that, include: A ground acquisition device (100) is installed on the ground in the exploration area, and the ground acquisition device (100) is used to acquire natural electromagnetic pulse signals from the ground; A data integration device (300) is used to receive the ground natural electromagnetic pulse signal and integrate the ground natural electromagnetic pulse signal into a ground data packet; The data processing device (400) is used to receive the ground data packet. After acquiring the ground natural electromagnetic pulse signal in the ground data packet, the data processing device (400) combines historical signal data and the ground natural electromagnetic pulse signal to perform signal estimation, obtain the airborne natural electromagnetic pulse estimation signal, and then generate the corresponding geological survey image based on the airborne natural electromagnetic pulse estimation signal. An aerial acquisition device (200) is used to acquire aerial natural electromagnetic pulse signals in the exploration area. The historical signal data is the aerial natural electromagnetic pulse signal acquired by the aerial acquisition device (200) in the last time. When the aerial acquisition device (200) acquires the aerial natural electromagnetic pulse signal, the ground acquisition device (100) also acquires the ground natural electromagnetic pulse signal. The data integration device (300) integrates the simultaneously acquired aerial natural electromagnetic pulse signal and ground natural electromagnetic pulse signal into a joint data packet. After the data processing device (400) obtains the joint data packet, it generates a corresponding geological survey image based on the aerial natural electromagnetic pulse signal in the joint data packet.

2. The real-time image generation system for geological exploration based on real-time data according to claim 1, characterized in that, The ground acquisition device (100) acquires the ground natural electromagnetic pulse signal at a set time interval. When the ground acquisition device (100) acquires the signal a set number of times, the air acquisition device (200) takes off and acquires the air natural electromagnetic pulse signal.

3. The real-time image generation system for geological exploration based on real-time data according to claim 1, characterized in that, The ground acquisition device (100) acquires the ground natural electromagnetic pulse signal at a set time interval, and the air acquisition device (200) also acquires the air natural electromagnetic pulse signal at a set time interval. The acquisition time interval of the air acquisition device (200) is an integer multiple of the acquisition time interval of the ground acquisition device (100).

4. The real-time image generation system for geological exploration based on real-time data according to claim 1, characterized in that, The data integration device (300) preprocesses the ground-based natural electromagnetic pulse signal and the air-based natural electromagnetic pulse signal, and integrates the preprocessed ground-based natural electromagnetic pulse signal and the air-based natural electromagnetic pulse signal.

5. The real-time image generation system for geological exploration based on real-time data according to claim 1, characterized in that, The ground acquisition device (100) and the air acquisition device (200) respectively use wired and wireless networks to transmit the ground natural electromagnetic pulse signals and air natural electromagnetic pulse signals to the data integration device (300), and the data integration device (300) then sends the combined data packet to the data processing device (400) via the Internet.

6. The real-time image generation system for geological exploration based on real-time data according to claim 5, characterized in that, The number of ground acquisition devices (100), air acquisition devices (200), and data integration devices (300) are all multiple. Each data integration device (300) is communicatively connected to at least one ground acquisition device (100). After the multiple data integration devices (300) integrate the combined data packet, they send the combined data packet to the data processing device (400) in a parallel transmission manner.

7. A real-time image generation system for geological exploration based on real-time data according to claim 6, characterized in that, The data processing device (400) processes the combined data packet sent by the data integration device (300) in a parallel processing manner to obtain real-time geological survey images.

8. The real-time image generation system for geological exploration based on real-time data according to claim 1, characterized in that, After acquiring the ground-based natural electromagnetic pulse signal and the airborne natural electromagnetic pulse signal, the ground-based acquisition device (100) and the airborne acquisition device (200) respectively perform signal conditioning on the ground-based natural electromagnetic pulse signal and the airborne natural electromagnetic pulse signal.

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