Ocean geomagnetic detection device

Abstract

The utility model relates to the technical field of geomagnetic detection, in particular to a marine geomagnetic detection device which comprises a proton precession magnetometer, a protective cover is sleeved outside the proton precession magnetometer, the protective cover is of a hollow spherical structure, a sliding groove is formed in the outer wall of the protective cover, an inner ring is installed in the sliding groove in a sliding mode, and the inner ring is connected with the proton precession magnetometer. A pin shaft is fixedly mounted on the outer wall of the inner ring, the free end of the pin shaft is fixedly connected with an outer ring, the rotating direction of the outer ring is opposite to that of the inner ring, a detachable connecting structure is arranged on the outer wall of the outer ring, and the connecting structure is connected with a surveying vessel through a rope. The beneficial effects of the proton precession magnetometer are that the measurement direction of the proton precession magnetometer is still not changed even if the measurement ship turns or the geomagnetic detection device bumps up and down due to the influence of ocean current, so that the measurement accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geomagnetic detection, in particular to a marine geomagnetic detection device. Background Art

[0002] Marine magnetic survey is the measurement of geomagnetic field in the ocean by using instruments carried by ships. There are three main forms: one is to install geomagnetic instruments on non-magnetic ships; the second is to use ordinary ships to tow magnetometers to measure in the ocean; the third is to sink seafloor magnetometers to the seabed for measurement. Large-scale marine magnetic survey was carried out in the early 20th century. By measuring on the ocean surface and the seabed at the same time, the vertical gradient of the geomagnetic field can be obtained.

[0003] When using an ordinary ship to tow a magnetometer for measurement on the ocean, the proton precession magnetometer will not always be directly below or behind the measuring ship due to the movement of the measuring ship and the ocean currents. In traditional marine geodetic detection devices, the proton precession magnetometer will be affected by various factors, and its measurement angle will shift due to its own shaking, resulting in inaccurate measurement results.

[0004] In order to address the above problems, a marine geomagnetic detection device is urgently needed. Utility Model Content

[0005] The purpose of the utility model is to provide a marine geomagnetic detection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, a marine geomagnetic detection device is provided, including a proton precession magnetometer, wherein a protective cover is mounted on the outside of the proton precession magnetometer, and the protective cover is a hollow spherical structure. A sliding groove is opened on the outer wall of the protective cover, and an inner ring is slidably installed in the sliding groove. A pin shaft is fixedly installed on the outer wall of the inner ring, and an outer ring is fixedly connected to the free end of the pin shaft. The rotation direction of the outer ring is opposite to that of the inner ring. A detachable connecting structure is arranged on the outer wall of the outer ring, and the connecting structure is connected to a measuring ship through a rope.

[0007] Furthermore, a hemispherical mounting seat is arranged inside the protective cover, and the proton precession magnetometer is arranged on the mounting seat, with the position of the sliding groove as the dividing line, and the mounting seat is located below the dividing line.

[0008] Furthermore, the connecting structure includes a connecting shaft, a hemisphere, a sealing ring and an air hole. There are two hemispheres, and the connecting shaft is arranged on the outer wall of one of the hemispheres. The sealing ring is clamped at the connection between the two hemispheres. The air hole is connected to the other hemisphere. The two hemispheres extract gas through the air hole to form a vacuum spherical structure.

[0009] Furthermore, the diameter of the outer ring is greater than the diameter of the inner ring.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. Even if the measuring ship turns or the geomagnetic detection device is affected by the ocean current and bumps up and down, the measuring direction of the proton precession magnetometer will not change, thus improving the accuracy of the measurement;

[0012] 2. The connection structure enables the device to be easily disassembled and separated from the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the protective cover and the sliding groove in the utility model;

[0015] Figure 3 It is a structural schematic diagram of the connection structure in the utility model;

[0016] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 5 It is a schematic diagram of the working state of the utility model.

[0018] The meaning of each number in the figure is:

[0019] 1. Proton precession magnetometer; 2. Protective cover; 3. Sliding groove; 4. Inner ring; 5. Pin shaft; 6. Outer ring; 7. Connecting structure; 701. Connecting shaft; 702. Hemisphere; 703. Sealing ring; 704. Air hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0022] See also Figure 1-Figure 4 As shown, a marine geomagnetic detection device is provided, including a proton precession magnetometer 1, wherein a protective cover 2 is provided on the outside of the proton precession magnetometer 1, wherein the protective cover 2 is a hollow spherical structure, wherein a sliding groove 3 is provided on the outer wall of the protective cover 2, wherein an inner ring 4 is slidably installed in the sliding groove 3, wherein the protective cover 2 and the inner ring 4 are combined to form a complete spherical structure, wherein the inner ring 4 can perform axial rotation in the sliding groove 3, wherein a pin shaft 5 is fixedly installed on the outer wall of the inner ring 4, wherein an outer ring 6 is fixedly connected to the free end of the pin shaft 5, wherein the rotation direction of the outer ring 6 is opposite to that of the inner ring 4, wherein a detachable connection structure 7 is provided on the outer wall of the outer ring 6, wherein the connection structure 7 is connected to the survey ship through a rope, and wherein the diameter of the outer ring 6 is greater than the diameter of the inner ring 4;

[0023] A hemispherical mounting seat 8 is provided inside the protective cover 2, and the proton precession magnetometer 1 is provided on the mounting seat 8, with the position of the sliding groove 3 as the dividing line, and the mounting seat 8 is located below the dividing line. In the actual installation process, it is ensured that the proton precession magnetometer 1 is perpendicular to the plane of the mounting seat 8 and is located at the axial position on the plane of the mounting seat 8;

[0024] The connection structure 7 includes a connection shaft 701, a hemisphere 702, a sealing ring 703 and an air hole 704. There are two hemispheres 701. The connection shaft 701 is arranged on the outer wall of one of the hemispheres 702. The sealing ring 703 is clamped at the connection between the two hemispheres 702. The air hole 704 is connected to the other hemisphere 702. The two hemispheres 702 extract gas through the air hole 704 to form a vacuum spherical structure.

[0025] It is worth noting that the two hemispheres 702, when combined, form a hollow spherical structure. The connection between the two hemispheres 702 is sealed by providing a sealing ring 703. The internal gas is extracted by using the air hole 704 to achieve a vacuum state of the sealed ball. Thus, under the action of atmospheric pressure or water pressure, the two hemispheres 702 are squeezed and fixed together. When disassembly is required, separation can be achieved by simply opening the air hole 704.

[0026] like Figure 5 As shown:

[0027] In this embodiment, in the actual detection process, the survey ship drags the local magnetic detection device by ropes to detect the geomagnetism of the ocean in the ocean. As the survey ship moves, the proton precession magnetometer 1 will not always be directly below or directly behind the survey ship. In traditional marine geodetic detection devices, the proton precession magnetometer 1 will be affected by various factors, and its measurement angle will be offset due to its own shaking. In this device, this offset angle is resolved by the rotation of the inner ring 4 and the outer ring 6. In order to better offset this offset, the outer ring 6 can be provided with multiple layers, so that the entire device can achieve the effect of a gyroscope, and the mounting seat 8 provided inside the protective cover 2 is not only used to install the proton precession magnetometer 1, but also has a greater role in acting as a weight-bearing device, lowering the center of gravity of the entire device, so that it can better maintain balance;

[0028] like Figure 5 As shown, even if the survey ship turns or the geomagnetic detection device is affected by the ocean current and bumps up and down, the measurement direction of the proton precession magnetometer 1 will not change, thereby improving the accuracy of the measurement.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A marine geomagnetic detection device, comprising a proton precession magnetometer (1), characterized in that: The proton precession magnetometer (1) is provided with a protective cover (2) on its exterior. The protective cover (2) is a hollow spherical structure. A sliding groove (3) is provided on the outer wall of the protective cover (2). An inner ring (4) is slidably mounted in the sliding groove (3). A pin shaft (5) is fixedly mounted on the outer wall of the inner ring (4). The free end of the pin shaft (5) is fixedly connected with an outer ring (6). The rotation direction of the outer ring (6) is opposite to that of the inner ring (4). A detachable connection structure (7) is provided on the outer wall of the outer ring (6). The connection structure (7) is connected to a measuring vessel via a rope.

2. The marine geomagnetic detection device according to claim 1, characterized in that: A hemispherical mounting seat (8) is arranged inside the protective cover (2), and the proton precession magnetometer (1) is arranged on the mounting seat (8), with the position of the sliding groove (3) being a dividing line, and the mounting seat (8) being located below the dividing line.

3. The marine geomagnetic detection device according to claim 2, characterized in that: The connection structure (7) comprises a connection shaft (701), a hemisphere (702), a sealing ring (703) and an air hole (704); there are two hemispheres (702); the connection shaft (701) is arranged on the outer wall of one of the hemispheres (702); the sealing ring (703) is clamped at the connection between the two hemispheres (702); the air hole (704) is connected to the other hemisphere (702); the two hemispheres (702) extract gas through the air hole (704) and form a vacuum spherical structure.

4. The marine geomagnetic detection device according to claim 3, characterized in that: The diameter of the outer ring (6) is greater than the diameter of the inner ring (4).

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