CN217983046U

CN217983046U - Earth frequency domain electromagnetic detection magnetic core coil sensor

Info

Publication number: CN217983046U
Application number: CN202222022776.6U
Authority: CN
Inventors: 王宇; 滕飞; 佟野
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-12-06
Anticipated expiration: 2032-08-02

Abstract

The utility model relates to a ground space frequency domain electromagnetic detection receives technical field, especially relates to a ground space frequency domain electromagnetic detection magnetic core coil sensor, and this magnetic core coil sensor contains coil skeleton and magnetic core, coil skeleton includes a plurality of equidistant and parallel arrangement's baffle, forms the cylindricality section of length such as waiting between the baffle, and the copper line winding is in the cylindricality section, and the copper line in the adjacent cylindricality section is established ties mutually, is hollow structure in the coil skeleton set up the magnetic core in the hollow structure, the magnetic core wraps up in hollow structure after the column is the little magnetic core laminating of a plurality of parallels. The utility model discloses magnetic core coil sensor solves the not enough problem of current system low frequency signal response, and the increase is surveyed the degree of depth, promotes exploration efficiency. The coil is divided into multiple parts by the framework partition plate, so that the self-capacitance is reduced, and the bandwidth of the coil is improved.

Description

Earth-space frequency domain electromagnetic detection magnetic core coil sensor

Technical Field

The utility model relates to a ground space frequency domain electromagnetic detection receives technical field, especially relates to a ground space frequency domain electromagnetic detection magnetic core coil sensor.

Background

The ground-space frequency domain electromagnetic detection is characterized in that an unmanned aerial vehicle is used as a flying platform, a receiving coil sensor and a receiver are carried, a magnetic field signal is received in the air according to the movement of a measuring line track, the magnetic field signal contains geological information of a measured area, the magnetic field which is induced to change by the receiving coil is an electric signal, the receiver conditions and collects the electric signal, and the underground information is obtained through post-processing. The existing receiving coil of the semi-aeronautical electromagnetic exploration generally adopts an air-core coil structure, but has the defects of low sensitivity and insufficient low-frequency response, which limits the large-depth exploration of the ground-air electromagnetic.

In the frequency domain electromagnetic detection method, signals with different frequencies reflect geological information of different depths, the geological information from the shallow ground surface to the large depth is required to be measured, and a receiving coil must have enough sensitivity and bandwidth.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a ground space frequency domain electromagnetic detection magnetic core coil sensor is provided, solve the not enough problem of current system low frequency signal response, make ground space frequency domain electromagnetic detection effect more accurate more stable.

The utility model discloses a realize like this, a ground space frequency domain electromagnetic detection magnetic core coil sensor, this magnetic core coil sensor contain coil skeleton and magnetic core, coil skeleton includes a plurality of equidistant and parallel arrangement's baffle, forms the cylindricality section of length such as between the baffle, and copper line winding is in the cylindricality section, and the copper line in the adjacent cylindricality section is established ties mutually, is hollow structure in the coil skeleton set up the magnetic core in the hollow structure, the magnetic core wraps up in hollow structure after the column is the little magnetic core laminating of a plurality of parallels.

Further, the cylindrical section is 11 sections and is divided by 12 partition plates.

Furthermore, the partition plate is provided with a gap for winding copper wires on adjacent cylindrical sections, and is provided with a hole groove for connecting the copper wires with the interface of the receiver after the copper wires pass through the hole groove.

Further, the opening is a fan-shaped opening. ,

furthermore, the opening and the hole groove are designed by adopting a fillet.

Furthermore, on the partition boards at the two ends, a square bayonet is arranged on the side face of one end opposite to the notch.

Furthermore, the number of the cylindrical small magnetic cores is 5, and the sum of the diameters of the three small magnetic cores is smaller than the inner diameter of the hollow structure.

Furthermore, the copper wire is non-uniformly wound on the coil skeleton, the cylindrical sections at the central part are wound more in turns, and the cylindrical sections at the two ends are wound less in turns.

Compared with the prior art, the utility model, beneficial effect lies in:

the utility model discloses magnetic core coil sensor solves the not enough problem of current system low frequency signal response, and the increase is surveyed the degree of depth, promotes exploration efficiency. The coil is divided into 11 parts by the framework partition plate, so that the self-capacitance is reduced, and the bandwidth of the coil is improved. The coil is non-uniformly wound on the coil framework, the number of winding turns of the central part of the magnetic core is large, the number of winding turns of the two ends is small, and the utilization of the effective magnetic conductivity of the magnetic bar can be ensured. The magnetic conductivity distributed on the surfaces of the plurality of small-diameter cylindrical magnetic cores is larger than that of a single large-diameter cylindrical magnetic core, so that the sensitivity of the coil sensor can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a sensor provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a cross section of a magnetic core according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and being shown in combination with fig. 2, a ground-space frequency domain electromagnetic detection magnetic core coil sensor contains the coil that the winding of copper line formed, coil skeleton to and set up the magnetic core in coil skeleton inside, coil skeleton is through a plurality of equidistant isothickness, and the baffle 1 isolation that the constant diameter set up is a plurality of cylindricality sections 5, every cylindricality section isothickness and isothickness, in this embodiment, keep apart to 11 cylindricality sections through 12 baffles, the copper line winding is on the cylindricality section, reduce self-capacitance, promote the coil bandwidth.

The number of turns of the coil part in each section of the framework is controlled, and a partition plate structure is added, so that the sectional design is realized. The coils are non-uniformly wound on the coil frame, the number of winding turns at the central part of the magnetic core is large, the number of winding turns at two ends is small, and the utilization of the effective magnetic conductivity of the magnetic bar can be ensured.

The partition board is provided with a fan-shaped opening 2, so that coils can be wound conveniently. And the other side corresponding to the fan-shaped opening is provided with a hole groove 3 for a copper wire to pass through, so that the coil is conveniently connected with an interface of a receiver. All the fan-shaped openings are corresponding in position, the hole grooves are corresponding in upper and lower positions, and the fan-shaped openings and the hole grooves are designed in a fillet mode, so that abrasion of copper wires can be avoided.

On the baffle at both ends, with the part that fan-shaped opening corresponds, set up a little square bayonet socket 3 respectively, make magnetic core sensor remain stable motionless in the shell, avoid the interference that unmanned aerial vehicle rocked.

Referring to fig. 2, the core is made up of 5 small cylindrical cores 6, the diameters of the three small cores adding up to be smaller than the inner diameter of a single bobbin. 5 magnetic cores are attached together and wrapped in the coil framework. The magnetic permeability distributed on the surfaces of the plurality of small-diameter cylindrical magnetic cores is larger than that of a single large-diameter cylindrical magnetic core, so that the sensitivity of the coil sensor can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. The utility model provides a ground space frequency domain electromagnetic detection magnetic core coil sensor, its characterized in that, this magnetic core coil sensor contain coil skeleton and magnetic core, coil skeleton includes a plurality of equidistant and parallel arrangement's baffle, forms the cylindricality section of length such as between the baffle, and copper line winding is in the cylindricality section, and the copper line in the adjacent cylindricality section is established ties mutually, is hollow structure in the coil skeleton set up the magnetic core in the hollow structure, the magnetic core wraps up in hollow structure after being the little magnetic core laminating of column of a plurality of parallels.

2. The ground-to-air frequency domain electromagnetic survey core coil sensor of claim 1 wherein the cylindrical section is 11 sections separated by 12 baffles.

3. A magnetic core coil sensor for electromagnetic survey in the earth-space frequency domain as recited in claim 1, wherein said spacer has a cutout for winding of copper wire on adjacent cylindrical sections and a slotted hole for connecting the copper wire to the receiver interface after passing through.

4. A space-frequency-domain electromagnetic sounding core coil sensor according to claim 3, wherein said notch is a fan-shaped notch.

5. A space-frequency-domain electromagnetic sounding core coil sensor according to claim 3, wherein said notches and slots are rounded.

6. A space-frequency-domain electromagnetic survey magnetic core coil sensor according to claim 3 wherein the spacer plates at both ends have a square bayonet on the side opposite the notch.

7. A ground-air frequency domain electromagnetic survey core coil sensor as defined in claim 1 wherein said column-shaped small cores are 5, the sum of the diameters of the three small cores being less than the inner diameter of the hollow structure.

8. The ground-to-air frequency domain electromagnetic survey magnetic core coil sensor of claim 1 wherein the copper wire is wound unevenly on the bobbin, the cylindrical section of the central portion being wound a greater number of turns and the cylindrical sections of the two ends being wound a lesser number of turns.