CN212514972U - Full-axis magnetic gradiometer and magnetic operating system - Google Patents
Full-axis magnetic gradiometer and magnetic operating system Download PDFInfo
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- CN212514972U CN212514972U CN202021212225.0U CN202021212225U CN212514972U CN 212514972 U CN212514972 U CN 212514972U CN 202021212225 U CN202021212225 U CN 202021212225U CN 212514972 U CN212514972 U CN 212514972U
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Abstract
The utility model provides a full axle magnetic gradiometer and magnetic force operating system. The gradiometer comprises: total field magnetic force sensing unit: the device comprises a first magnetometer and a second magnetometer which are arranged at intervals in the transverse direction, and a third magnetometer and a fourth magnetometer which are arranged at intervals in the longitudinal direction; the system comprises a first magnetometer, a second magnetometer, a third magnetometer and a fourth magnetometer, wherein the first magnetometer and the second magnetometer are used for acquiring horizontal and transverse total field gradients, the third magnetometer and the fourth magnetometer are used for acquiring vertical total field gradients, and the first magnetometer, the second magnetometer and the fourth magnetometer are used for acquiring horizontal and longitudinal total field gradients; a data processing system: and the magnetic sensor is communicated with the total field magnetic sensing unit and used for acquiring magnetic data detected by the total field magnetic sensing unit. A magnetic working system can be constructed by adopting one or more full-axis magnetic gradiometers. The system can calculate and obtain magnetic field gradient tensor data by synchronously acquiring data of a plurality of total field magnetic sensing units, thereby improving the function of the system and improving the detection efficiency and the information quantity.
Description
Technical Field
The utility model relates to a magnetic force exploration technical field, concretely relates to full axle magnetic gradiometer and magnetic force operating system.
Background
The conventional ocean magnetic detection is generally geomagnetic total field measurement, and the structure refers to fig. 1. A single total field magnetometer is towed by the tail end of the survey vessel 1 through a streamer 2. The operation mode adopts a single total field magnetometer to carry out towing operation, the magnetometer is towed in stern seawater through a towing cable, the towing cable supplies power and transmits signals, and the magnetic parameters of the ground-ocean magnetic field are obtained. The operation mode can only obtain geomagnetic total field data, the obtained magnetic data information amount is small, the data transverse measuring point density (the typical transverse measuring point distance is larger than 1000m) is far lower than the longitudinal measuring point density (the typical longitudinal measuring point distance is smaller than 5m), the geological interpretation difficulty is large, and the operation efficiency is low. The conventional ocean magnetic measurement is seriously interfered by solar diurnal variation, and geomagnetic diurnal variation measurement is needed while the ocean magnetic measurement is carried out, so that the ocean magnetic measurement is difficult to realize in open sea, and the conventional ocean magnetic measurement is low in precision and low in measurement efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a whole axle magnetic gradiometer and magnetic force operating system of multiple earth magnetic data of measurable quantity to the limited problem of measured data that magnetic detection system exists among the prior art.
In order to achieve the above object, some embodiments of the present invention provide the following technical solutions:
a full-axis magnetic gradiometer comprising:
a substrate;
total field magnetic force sensing unit: the device is arranged on the base body and comprises a first magnetometer and a second magnetometer which are arranged at intervals in the transverse direction, and a third magnetometer and a fourth magnetometer which are arranged at intervals in the longitudinal direction; the first magnetometer, the second magnetometer and the fourth magnetometer are used for acquiring total field gradient in the horizontal and transverse directions, the third magnetometer and the fourth magnetometer are used for acquiring total field gradient in the vertical direction, and the first magnetometer, the second magnetometer and the fourth magnetometer are used for acquiring total field gradient in the horizontal and longitudinal directions;
a three-component magnetometer: the device is arranged on the base body and used for measuring the X-axis component, the Y-axis component and the Z-axis component of the geomagnetic field;
a data processing system: and the magnetic sensor is communicated with the total field magnetic sensing unit and the three-component magnetometer and is used for acquiring magnetic data detected by the total field magnetic sensing unit and the three-component magnetometer.
The utility model discloses some embodiments, the gradiometer is further including installing the attitude sensor on the base member, the data acquisition unit further communicates with attitude sensor for gather gradiometer's attitude data.
In some embodiments of the present invention, the three-axis direction of the three-component magnetometer is the same as the three-axis direction of the attitude sensor.
In some embodiments of the present invention, the substrate comprises: the magnetic balance weight type magnetic field sensor comprises a non-magnetic balance weight frame and a buoyancy material arranged on the frame, wherein the data processing system, a magnetic total field sensing unit and a three-component magnetometer are arranged on the buoyancy material.
In some embodiments of the present invention, the floating structure further comprises a first frame and a second frame mounted on the buoyant material;
the first magnetometer and the second magnetometer are arranged on the first frame at intervals and are respectively arranged on two sides of the buoyancy material;
the third magnetometer and the fourth magnetometer are arranged on the second frame and are arranged in an upper-lower row.
In some embodiments of the present invention, the gradiometer further comprises a power supply for powering the magnetometer, magnetometer and data processing system; the base body further comprises a sealed cabin, and the power supply is arranged in the sealed cabin.
In some embodiments of the present invention, the gradiometer further comprises a GPS module, which communicates with the data processing system, for receiving satellite time signals and sending the satellite time signals to the data processing system.
In some embodiments of the invention, the data processing system is configured to calculate magnetic field gradient tensor data from the total field magnetic sensing unit and the detection data of the three-component magnetometer.
The utility model discloses some embodiments still provide a magnetic force operating system, including foretell full axle magnetic gradiometer, and data terminal, data terminal is located the investigation ship, and full axle magnetic gradiometer includes wireless transmitting module, and data terminal includes wireless receiving module, data terminal can carry out wireless data communication with every full axle magnetic gradiometer.
In some embodiments of the present invention, if the operation system includes a plurality of all-axis magnetic gradiometers, the plurality of all-axis magnetic gradiometers are arranged in an array; setting a data processing system of a gradiometer as a master node, setting data processing systems of other gradiometers except the master node as slave nodes, wherein the slave nodes are in wireless communication with the master node, and the master node is in wireless communication with a data terminal. In the magnetic operation, an investigation ship drags a plurality of full-axis magnetic gradiometers synchronously, and the full-axis magnetic gradiometers are arranged in an array. The method comprises the steps that a data processing system of a gradiometer is set as a main node, data processing systems of other gradiometers except the main node are slave nodes, a plurality of towed magnetometer towed body ad hoc networks are arranged, the slave nodes are in wireless communication with the main node, and the main node is in wireless communication with a survey ship data terminal.
In some embodiments of the present invention, there is provided a magnetic force operation method, which uses the above-mentioned magnetic force operation system, including:
synchronously acquiring data of a plurality of total field magnetic sensing units, shaping the data to generate a standard square wave signal, calculating the frequency of the square wave signal by adopting a digital interpolation method, and solving a magnetic field value;
acquiring geomagnetic three-component data, and resolving the geomagnetic three-component data into a geodetic coordinate system to represent the geomagnetic three-component data in combination with attitude sensor data;
and calculating magnetic field gradient tensor data according to the detection data of the total field magnetic sensing unit and the three-component magnetometer.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect lies in:
the full-axis magnetic gradiometer can simultaneously detect total field magnetic data and geomagnetic three-component data and can calculate magnetic field gradient tensor data. The detection system is constructed by adopting the full-axis magnetic gradiometer, a plurality of magnetic gradiometer towed bodies can be towed simultaneously to carry out magnetic detection, and the towed magnetic gradiometer towed bodies carry out synchronous acquisition and transmission of networking data, so that the transverse data density of magnetic measurement is greatly improved, and the precision of magnetic detection can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a schematic diagram of a magnetic force detecting structure in the prior art;
FIG. 2 is a schematic structural view of the whole-axis magnetic gradiometer of the present invention;
FIG. 3 is a schematic view of the top view structure of the whole-axis magnetic gradiometer of the present invention;
FIG. 4 is a schematic diagram of the wireless data transmission of the magnetic force detection system of the present invention;
FIG. 5 is a schematic diagram of the logic structure of the magnetic force detecting system of the present invention;
FIG. 6 is a schematic diagram of a logical organization of a data processing system;
FIG. 7 is a schematic diagram of a logical structure of a data terminal;
FIG. 8 is a schematic diagram of a marine exploration system;
1-survey vessel;
2-a streamer;
3-a magnetometer;
401-no magnetic counterweight frame, 4011-dragging point, 402-buoyancy material, 403-sealed cabin, 404-first frame, 405-second frame;
501-a first magnetometer, 502-a second magnetometer, 503-a third magnetometer, 504-a fourth magnetometer,
a 6-three component magnetometer;
7-a data processing system;
8-attitude sensors;
9-a GPS module;
10-a power supply;
1101-master node magnetometer, 1102-slave node magnetometer;
12-seismic source.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and do not imply relative importance. "connect," "communicate," and the like may refer to either a direct connection or a direct communication between the components, or an indirect connection or an indirect communication between the components.
The utility model provides a full-axis magnetic gradiometer for the operation is surveyed to the magnetic force, and this magnetic gradiometer provides earth magnetism total field data and full-axis magnetic gradient data, and measured data information is abundanter. The structure of the magnetic gradiometer with reference to fig. 2 and 3 comprises:
a substrate; in some embodiments, the substrate comprises: the non-magnetic counterweight frame 401 and the buoyancy material 402 arranged on the non-magnetic counterweight frame 401 are arranged at the front end of the frame 401.
Total field magnetic force sensing unit: the device is arranged on a base body, particularly on a buoyancy material 402, and comprises a first magnetometer 501 and a second magnetometer 502 which are arranged at intervals in the transverse direction, and a third magnetometer 503 and a fourth magnetometer 504 which are arranged at intervals in the longitudinal direction; the first magnetometer 501 and the second magnetometer 502 are used for acquiring total field gradient in the horizontal and transverse directions, the third magnetometer 503 and the fourth magnetometer 504 are used for acquiring total field gradient in the vertical direction, and the first magnetometer 501, the second magnetometer 502 and the fourth magnetometer 504 are used for acquiring total field gradient in the horizontal and longitudinal directions; preferably, the four magnetometers are CS-3 high-precision cesium optical pump magnetometers manufactured by Scintrex Canada;
three-component magnetometer 6: the device is arranged on a base body, particularly on a buoyancy material 402 and used for measuring the X-axis component, the Y-axis component and the Z-axis component of the geomagnetic field;
the data processing system 7: the system comprises a data acquisition unit, specifically comprises a total field magnetic force data acquisition module and a three-component magnetometer data acquisition module, which are respectively communicated with a total field magnetic force sensing unit and a three-component magnetometer 6 and are used for acquiring magnetic force data detected by the total field magnetic force sensing unit and the three-component magnetometer 6. The data processing system 7 comprises a master controller for the processing and calculation of data.
Further reference is made to fig. 2 and 3.
The total field magnetic force sensing unit comprises four fixedly mounted magnetic force sensors and is used for measuring magnetic total field data and full-axis magnetic gradient data. A first frame 404 and a second frame 405 on the buoyant material 402; the first magnetometer 501 and the second magnetometer 502 are arranged on the first frame 404 at intervals, are respectively arranged at two sides of the buoyancy material 402 and are used for measuring the total field gradient in the vertical direction; the third magnetometer 503 and the fourth magnetometer 504 are mounted on the second frame 405, and are arranged up and down for measuring the transverse magnetic total field gradient. The first magnetometer 501, the second magnetometer 502 and the fourth magnetometer 504 are matched to measure the longitudinal aeromagnetic total field gradient. In the attached drawings, dx, dy and dz are the base length of horizontal transverse direction, horizontal longitudinal direction and vertical direction respectively.
Furthermore, the total field magnetic sensing unit is used for receiving the instruction of the master controller in real time, synchronously acquiring the magnetic data of the 4 total field magnetometers and sending the data to the master controller for processing. The total field magnetometer acquisition module firstly shapes the Larmor signal output by the magnetometer to form a standard square wave signal, and then acquires and calculates the frequency of the square wave signal by adopting a digital interpolation method to further work out a corresponding magnetic field value, so that the synchronous acquisition of data of each magnetometer is ensured. Preferably, the shaping module employs a 74HC14 schmitt trigger.
The digital interpolation method is further improved aiming at the problem that the frequency of larmor signals output by probes of various magnetometers cannot be completely synchronized due to unfixed gate time of an equal-precision frequency measurement method. When the master controller issues an acquisition instruction, the gate time is generated by the standard pulse signal inside the chip, the measured signal and the standard signal are counted simultaneously, and the measured signal frequency can be expressed as:
fx＝[(t2-t1+t3)/t2+n]/T (1)
the corresponding error expression is:
σ＝(2fxfG)/fs (2)
wherein f isxFor the frequency of the signal to be measured, fGTo sample frequency, fsThe standard pulse frequency is used, so that the error can be reduced by properly increasing the standard pulse signal frequency when the range and the sampling rate of the measured signal are constant. Although the method still has the error of +/-1 of the standard signal, the method can output at stable time intervals because the gate time is fixed. When the signal acquisition channels of the 4 total field magnetometers use the same sampling control signal and the same gate time, the synchronous acquisition among multiple channels can be realized.
The three-component magnetometer 6 is a fluxgate magnetic sensor for measuring three components of the earth magnetic field X, Y, Z. The utility model discloses some embodiments, the gradiometer is further including installing the attitude sensor on the base member, the data acquisition unit further communicates with attitude sensor 8 for gather the attitude data of gradiometer. Further, the three-component magnetometer 6 should be horizontally placed on the buoyant material 402, and should be placed as close to the attitude sensor 8 as possible, so as to avoid other noise interference. The three-axis directions of the three-component magnetometer 6 should be consistent with the three-axis directions of the attitude sensor 8.
Furthermore, in the data processing system, the acquisition module in charge of the data of the three-component magnetometer 6 comprises an AD acquisition chip, and when the main controller issues an acquisition instruction, the three-component magnetometer acquisition module acquires three linear analog voltages of an X axis, a Y axis and a Z axis output by the three-component magnetometer 6, converts the three linear analog voltages into digital signals and transmits the digital signals to the main controller for processing. Preferably, the AD acquisition chip is an AD7791 chip of ADI company, and the characteristics of 24-bit high resolution and low power consumption can meet the operation requirement.
Further, the full-axis magnetic gradiometer also comprises the following functional units.
The GPS module 9: the device is arranged on the buoyancy material, is communicated with the main controller, is used for receiving a satellite 1pps time service signal and NEMA information, sends the received signal to the main controller and provides a high-precision time service clock for the main controller; during operation, a GPS time service pulse signal is used as a reference clock for triggering each module to collect, and the master controller controls other collection modules to strictly carry out synchronous data collection of the total field magnetic force sensing unit, the three-component magnetometer 6, the attitude sensor 8 and other units.
Power supply 10: the power supply system is used for supplying power to the magnetometers, the magnetometers and the data processing system and other electric equipment; to address the placement of the power source 10, the base further includes a sealed compartment 403, and the power source is disposed within the sealed compartment 403. The capsule 430 may be disposed on the buoyant material 402, or inside the buoyant material 402. The data processing system comprises a power management module, which is used for performing DC-DC voltage reduction processing on the power supply in the sealed cabin 403 and providing stable power supply for each power utilization module.
A data terminal: the device can be arranged in a far-end room or on a ship and is used for monitoring data acquired and calculated by the full-axis magnetic gradiometer. The wireless receiving module, the data storage module and the data display module are configured. The data terminal analyzes and processes the data packet sent by the wireless module, processes and analyzes the data into the towed body number, the total magnetic field data, the magnetic gradient data, the three-component magnetic force data, the attitude data, the position data and the time information, and sends the data to the display module and the storage module according to the data format. And the display module is used for displaying the analyzed data so as to monitor in real time. The storage module is used for recording the analyzed data in real time so as to facilitate subsequent resolving. Preferably, the storage module is an SD card (including an SD card management module) or a hard disk.
A wireless transmission module: the system is configured in a data processing system and solves the data communication problems between the full-axis magnetic gradiometers and the control terminal. The wireless sending module is mainly used for wirelessly sending data packets which are collected and packaged by the master controller for multiple times, and each data packet contains total field magnetic sensing unit data, three-component magnetic data, attitude data, GPS positioning data, time information and a unique serial number corresponding to a magnetometer towed body. If the detection system is provided with a plurality of full-axis magnetic gradiometers, each full-axis magnetic gradiometer towed body comprises a data processing system, and each data processing system comprises a wireless transmitting module, and the detection system can be configured in the following form.
Example 1: when the detection system is configured with a full-axis magnetic gradiometer to carry out full-axis magnetic gradient measurement operation, the wireless module is configured to be in a normal data transmission mode, namely point-to-point data transmission, the sending address is the same as the address of a wireless receiving module of a data terminal, and after the communication rate, the working frequency band, the receiving and sending channels and other parameters are configured, the wireless transmission of single-packet data can be realized. Preferably, the wireless sending module is selected from a company named as LoRa6500pro, the highest transmission distance of the module can reach 10KM, and the receiving sensitivity reaches-139 dBm, so that the LoRa demodulation technology can still correctly demodulate data under noise, has high anti-interference capability, and meets the operation requirement.
Example 2: referring to fig. 4, when the detection system is configured with a plurality of all-axis magnetic gradiometers to perform all-axis magnetic gradient measurement, considering that, because the distance between the data terminal and the all-axis magnetic gradiometer is relatively long, if each data terminal transmits data to the inside of the measurement ship, on one hand, power consumption is increased, and on the other hand, it cannot be guaranteed that the data terminal accurately receives data of all floating bodies, when the measurement ship drags a plurality of all-axis magnetic gradiometers to perform operation, networking communication is performed between all the all-axis magnetic gradiometers, preferably, a ZigBee protocol is adopted, and a mode configuration "one-to-many mode", that is, a master-many slave mode, is adopted, a networking module located in the middle all-axis magnetic gradiometer is a master node magnetometer 1101, networking modules on the other all-axis magnetic gradiometers are slave node magnetometers 1102, serial data received by the master node magnetometer 1101 can be transmitted to serial ports, the serial port data received by the other slave node magnetometers 1102 are independently transmitted to the master node magnetometer 1101, so that the master node magnetometer 1101 acquires and controls the data of the other slave node magnetometers 1102.
The master node and the slave nodes have automatic relay functions, each node forms a network, when node signals cannot reach directly, data can also be automatically relayed to the master node, the master node collects data transmitted by other nodes and outputs the data to the master controller through a serial port for integration, and as the distance between the master node and the data terminal is several kilometers, preferably, after the master node receives the data of other nodes, the integrated data packet is transmitted to the indoor gradient meter acquisition system point to point through the LoRa6500pro communication module described in embodiment 1. In actual operation, the distance between two adjacent full-axis magnetic gradiometers is about 100m, preferably, a ZigBee networking module in a wireless module on each full-axis magnetic gradiometer selects a 2.4G radio frequency transceiver core CC2530 with TI high performance and low power consumption, the transmission distance of the chip in an open area can reach 200m, and the air speed is as high as 250 Kbps. The requirement of networking communication transmission is met. (the wireless module of the main node comprises a wireless sending module and a networking module, and the wireless module of the slave node only comprises the networking module)
In the above embodiment, the data terminal and the master node magnetometer 1101 have the same model, and preferably, both adopt a LoRa6500pro communication module. The address of the wireless receiving module in the ship is the same as the target address of the floating body sending module, other parameters can be the same, then the data packet sent by the floating body main node is directionally received, and the data packet is sent to the data processing module through the serial port.
In some embodiments of the invention, the data processing system is configured to calculate magnetic field gradient tensor data from the total field magnetic sensing unit and the detection data of the three-component magnetometer.
The specific calculation method is as follows.
Wherein G is the full-axis magnetic gradient, GxFor the component of the full-axis magnetic gradient in the X-axis, GyFor the full-axis magnetic gradient in the Y-axis component, GzIs the Z-axis component of the full-axis magnetic gradient. T ish1For the total magnetic field strength, T, measured by the first magnetometer 501h2For the total magnetic field strength, T, measured by the second magnetometer 502v1For the total magnetic field strength, T, measured by the third magnetometer 503v2The total magnetic field strength measured for the fourth magnetometer 504. dxTo the horizontal transverse base length, dyTo the horizontal longitudinal base length, dzIs the vertical baseline length.
The magnetic field gradient tensor g characterizes the spatial rate of change of the three components (Bx, By, Bz) of the magnetic field vector along three mutually orthogonal axes, and the magnetic field gradient tensor g contains 9 components in total, as shown in equation 5.
Wherein, gxxIs the gradient of Bx in the x-direction, gxyIs the gradient of Bx in the y direction, gxzIs the gradient of Bx in the z direction, gyxGradient of By in x-direction, gyyIs the gradient of By in the y direction, gyzIs the gradient of By in the z direction, gzxIs the gradient of Bz in the x direction, gzyIs the gradient of Bz in the y direction, gzzIs the gradient of Bz along the z direction.
Wherein, BexIs the cosine of the direction of the geomagnetic field direction vector in the x direction, BeyIs the cosine of the direction of the earth magnetic field direction vector along the y direction, BezIs the direction cosine of the earth-magnetic field direction vector in the z direction, kx、ky、kzIs the frequency domain wavenumber.
In some embodiments of the present invention, a magnetic force detection system is further provided based on a full-axis magnetic gradiometer. The magnetic detection system comprises a data terminal and at least one full-axis magnetic gradiometer.
Further provides an application of the magnetic detection system on the sea.
Referring to fig. 8, including survey vessel 1, a data terminal is disposed within survey vessel 1. The stern is provided with a seismic source 12 for performing seismic exploration tasks. The full-axis magnetic gradiometer is towed through the streamer 2 at the rear end of the survey vessel 1, in the sea water behind the streamer. In the operation, the sailing speed of the survey ship is controlled to be 4-5 sections; the marine seismic exploration is carried out simultaneously according to an operation task and a magnetic exploration task.
In the operation process, the main controller receives the GPS module high-precision time service pulse and the GPRMC data, the main controller takes the GPS high-precision time service pulse signal as a control signal for triggering each module to collect, and meanwhile, the main controller synchronously issues a collection instruction to each data collection unit. The total field magnetometer acquisition module is used for synchronously acquiring magnetic data of the four total field magnetometers after receiving the instruction, acquiring the magnetic data once every 100ms, and sending the data to the main controller. The three-component magnetometer acquisition module acquires three-component magnetic data after receiving the instruction, acquires the three-component magnetic data every 100ms, and transmits the data to the master controller. The attitude module collects attitude data of the floating body after receiving the instruction, collects the attitude data every 100ms later, and sends the data to the main controller. In the operation, the master controller can pack the data collected each time into a data frame format according to the serial number of the magnetometer towed body, the four total field magnetic data, the three-component magnetic data, the attitude data, the position information and the time information, temporarily stores the data in the RAM, sends the data to the wireless sending module through the serial port after collecting ten times, and further sends the data to the data terminal.
In this embodiment, 5 full-axis magnetic gradiometers are towed at the rear end of the survey vessel 1. The magnetic gradiometer in the middle is set as master node gradiometer 1101 and the other four nodes are set as slave node gradiometers 1102. As the utility model discloses a simplify, according to the investigation demand, also can select to adopt a full axle magnetic gradiometer. For the networking communication method between the master node and the slave node, reference is made to embodiment 1 and embodiment 2, which are not described again.
In some embodiments of the present invention, there is provided a magnetic force operation method, which uses the above-mentioned magnetic force operation system, including:
synchronously acquiring data of a plurality of total field magnetic sensing units, shaping the data to generate a standard square wave signal, calculating the frequency of the square wave signal by adopting a digital interpolation method, and solving a magnetic field value; the specific calculation method refers to the foregoing embodiments, and is not described in detail;
collecting geomagnetic three-component data, resolving the geomagnetic three-component data into a geodetic coordinate system to represent by combining attitude sensor data, and improving data precision;
further, magnetic field gradient tensor data can be calculated based on the total field magnetic sensing unit data and the geomagnetic three-component data; the specific calculation method refers to the foregoing embodiments, and is not described in detail.
Will the utility model provides a full axle magnetic gradiometer is used for detecting system to carry out three-dimensional magnetic detection, can survey total field magnetic data, earth magnetism three-component data simultaneously to can calculate and obtain magnetic field gradient tensor data, compare than prior art, improve the function of system. The detection system can drag a plurality of magnetometer drags simultaneously to carry out magnetic detection, and the plurality of dragging magnetometer drags are subjected to synchronous acquisition and transmission of networking data, so that the density of magnetic measurement transverse data is greatly improved, the density of transverse measuring points reaches 100m or even higher, and the density of transverse data can be improved by more than 10 times compared with the prior art. The surface element orthogonal retest of magnetic data can be realized, the number of times of all surface element retests can reach more than 2, the measurement error caused by single acquisition in the traditional ocean magnetic detection is reduced, and the magnetic measurement precision is improved by more than 20%. Particularly, the method can be synchronously operated with three-dimensional seismic exploration to synchronously obtain three-dimensional magnetic exploration data, and the geophysical exploration efficiency and the information content are greatly improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A full-axis magnetic gradiometer, comprising:
a substrate;
total field magnetic force sensing unit: the device is arranged on the base body and comprises a first magnetometer and a second magnetometer which are arranged at intervals in the transverse direction, and a third magnetometer and a fourth magnetometer which are arranged at intervals in the longitudinal direction; the first magnetometer, the second magnetometer and the fourth magnetometer are used for acquiring total field gradient in the horizontal and transverse directions, the third magnetometer and the fourth magnetometer are used for acquiring total field gradient in the vertical direction, and the first magnetometer, the second magnetometer and the fourth magnetometer are used for acquiring total field gradient in the horizontal and longitudinal directions;
a data processing system: and the magnetic sensor is communicated with the total field magnetic sensing unit and used for acquiring magnetic data detected by the total field magnetic sensing unit.
2. The full axis magnetic gradiometer of claim 1, further comprising a three-component magnetometer: the device is arranged on the base body and used for measuring the X-axis component, the Y-axis component and the Z-axis component of the geomagnetic field; the data processing system further collects magnetic force data detected by the three-component magnetometer.
3. The full-axis magnetic gradiometer of claim 2, further comprising attitude sensors mounted on the substrate, the data processing system further in communication with the attitude sensors for collecting attitude data of the gradiometer; the directions of three axes of the three-component magnetometer are consistent with the directions of three axes of the attitude sensor.
4. The all-axis magnetic gradiometer of claim 2, wherein the substrate comprises: the magnetic balance weight type magnetic field sensor comprises a non-magnetic balance weight frame and a buoyancy material arranged on the frame, wherein the data processing system, a magnetic total field sensing unit and a three-component magnetometer are arranged on the buoyancy material.
5. The full axis magnetic gradiometer of claim 4, further comprising a first frame and a second frame mounted on the buoyant material;
the first magnetometer and the second magnetometer are arranged on the first frame at intervals and are respectively arranged on two sides of the buoyancy material;
the third magnetometer and the fourth magnetometer are arranged on the second frame and are arranged in an upper-lower row.
6. The full axis magnetic gradiometer of claim 4, further comprising a power supply for powering the magnetometer, magnetometer and data processing system; the base body further comprises a sealed cabin, and the power supply is arranged in the sealed cabin.
7. The full-axis magnetic gradiometer of claim 1, further comprising a GPS module in communication with the data processing system for receiving satellite time signals for transmission to the data processing system.
8. A magnetic work system comprising at least one full-axis magnetic gradiometer according to any of claims 1 to 7, and a data terminal in data communication with each full-axis magnetic gradiometer.
9. A magnetic force operation system according to claim 8, wherein the data processing system includes a wireless transmitting module, the data terminal includes a wireless receiving module, and the wireless transmitting module and the wireless receiving module are in data communication.
10. A magnetic work system according to claim 8 or 9, comprising a plurality of full axis magnetic gradiometers, the gradiometers being arranged in an array; setting a data processing system of a gradiometer as a master node, setting data processing systems of other gradiometers except the master node as slave nodes, wherein the slave nodes are communicated with the master node, and the master node is communicated with a data terminal.
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