Geomagnetic magnetometer calibration device

Abstract

The invention discloses a geomagnetic magnetometer calibration device, and belongs to the technical field of magnetic measuring instrument metering, the geomagnetic magnetometer calibration device comprises a base support, a magnetic field assembly is arranged in the base support, a stabilizing assembly is arranged at the bottom of the base support, and a supporting assembly connected with the base support is arranged above the stabilizing assembly. When the base support is fixed, the supporting angle of the supporting inclined bar and the insertion depth of the anchor can be adjusted in real time according to the ground flatness, so that the stability of the base support is ensured, the situation that the supporting angle of the supporting inclined bar is too large, large space is occupied is avoided, and the situation that the anchor is inserted too deep, time and labor are wasted when the anchor is taken out, and next-time movement of the device is affected is avoided.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of magnetic measuring instrument measurement, and in particular to a geomagnetic magnetometer calibration device. Background Art

[0002] Based on the high sensitivity and fast response of optically pumped magnetometers, a closed-loop lock method for geomagnetic field measurements is used to create a highly stable magnetic field environment for magnetometer calibration. This is a practical metrological technique for geomagnetic magnetometer measurement. However, due to the large size of magnetometer probes (typically 3 to 7 cm), and the significant mutual interference generated when two magnetometers operate simultaneously, a large uniform magnetic field must be generated to avoid instrument interference. However, coils with large uniformity areas are generally bulky. For example, to generate a uniform magnetic field with a uniformity area greater than 10 cm and a uniformity of 1 part per million, a typical compound Helmholtz coil would have to be 3.6 meters in diameter, and a Barker coil would be over 2 meters long. To ensure that, in such a uniform magnetic field, after locking the magnetic field using the phase-locked loop principle, the magnetic field remains stable enough to evaluate the pT-level noise of optically pumped magnetometers, such a large coil would be immobile and impractical for field measurement.

[0003] Although the existing magnetic field calibration device can measure the magnetic field well when in use, the magnetic field calibration device has a relatively large area, so when installed in an uneven outdoor environment, the device may have poor stability. Summary of the Invention

[0004] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technology. Specifically, the present invention mainly provides a geomagnetic magnetometer calibration device to solve the technical problems raised in the above background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A geomagnetic magnetometer calibration device includes a base bracket, a magnetic field component is arranged inside the base bracket, a stabilizing component is arranged at the bottom of the base bracket, and a supporting component connected to the base bracket is arranged above the stabilizing component; The stabilizing assembly includes a spirit level and four groups of supporting electric push rods. A supporting plate is installed at the lower end of each group of supporting electric push rods. A plurality of accommodating sleeves are provided on the supporting plate. A piston rod slides inside each of the accommodating sleeves. An adjusting box is provided on one side of each group of supporting electric push rods. An air cavity and an oil cavity are provided inside the adjusting box. The support assembly includes four groups of support slashes, on which a second hinge seat is slidably mounted, and a first oil telescopic rod is hingedly connected to the second hinge seat, and the first oil telescopic rod and the oil cavity are connected via a connecting pipe; The bottom end of the support bar is connected to a fixed sleeve, and a second oil telescopic rod is arranged inside the fixed sleeve. The second oil telescopic rod is connected to the first oil telescopic rod through a hose, and the other end of the second oil telescopic rod is rotatably connected to a fixed pile.

[0006] Preferably, the magnetic field assembly includes a magnetic field coil, a stabilizing field magnetometer, an automatic stabilizing field circuit and a standard magnetometer. The magnetic field coil is arranged around the base bracket and forms a rectangular ring. The stabilizing field magnetometer, the automatic stabilizing field circuit and the standard magnetometer are arranged inside the magnetic field coil.

[0007] Preferably, a central control is provided on the base bracket.

[0008] Preferably, the spirit level is mounted on a base bracket, and the four groups of supporting electric push rods are all provided with fixed hollow columns. The four groups of fixed hollow columns are equidistantly distributed around the base bracket, and the four groups of fixed hollow columns are connected to the base bracket.

[0009] Preferably, the accommodating sleeve opens downward, and two adjacent accommodating sleeves are connected via connecting pipes. A limiting ring is provided inside each accommodating sleeve, and the limiting ring is located below the connecting port between the connecting pipe and the accommodating sleeve.

[0010] Preferably, an internal electric push rod and a partition are respectively provided at the upper and lower ends of the regulating box, the air cavity and the oil cavity are located on both sides of the partition, pistons are sliding inside the air cavity and the oil cavity, the lower end of the internal electric push rod and the two pistons are connected by a bracket, and the air cavity and one of the accommodating sleeves are connected by a connecting pipe.

[0011] Preferably, the upper end of each group of support bars is hinged with a first hinge seat, the first hinge seat and the second hinge seat have the same structure, and are both provided with self-locking screws inside, and the other end of the first oil telescopic rod is installed on the base bracket through a fixed seat.

[0012] Preferably, a locking piece is provided at the lower end of the side wall of the fixing sleeve, and the locking piece includes a mounting seat and a screw threadedly connected to the mounting seat and the fixing sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) After the base bracket moves to the point to be measured, the four groups of supporting electric push rods are started. The four groups of supporting electric push rods are raised and lowered, and the level is observed to ensure that the base bracket is level. After it is level, the four groups of supporting electric push rods are closed; the inner electric push rod is started, and the inner electric push rod pushes the two pistons to move through the bracket, so that the gas inside the gas cavity and the oil inside the oil cavity enter the inside of each accommodating sleeve and the inside of the second oil telescopic rod respectively. The inside of the accommodating sleeve continuously takes in air, so that the piston rod moves downward until each piston rod contacts the ground, so that the piston rod cannot move downward; while the piston rod moves downward, the oil inside the oil cavity enters the second oil telescopic rod, so that the second oil telescopic rod extends, thereby allowing the support diagonal bar to expand outward; as the second oil telescopic rod extends, the original oil inside the second oil telescopic rod will enter the inside of the first oil telescopic rod, so that the first oil telescopic rod extends, thereby continuously pushing the anchor nail out of the fixed sleeve, and the length of the anchor nail outside the fixed sleeve is the depth of the anchor nail into the ground; In summary: the present invention adopts dual fixation of stabilizing components and supporting components, which ensures the levelness of the base bracket while ensuring the stability of its installation. It is suitable for uneven ground environments in the field, and is quick and convenient to install, fix and disassemble, making it easy to use.

[0014] (2) As the piston rod moves downward, the oil inside the oil cavity enters the second oil telescopic rod, causing the second oil telescopic rod to extend, thereby allowing the support diagonal bar to expand outward, providing a larger support angle, and improving support stability. That is, the worse the ground flatness, the larger the support angle, ensuring stability; as the second oil telescopic rod extends, the original oil inside the second oil telescopic rod will enter the first oil telescopic rod, causing the first oil telescopic rod to extend, thereby continuously pushing the anchor nail out of the fixing sleeve. The length of the anchor nail outside the fixing sleeve is the depth of the anchor nail into the ground, achieving the worse the ground flatness, the greater the anchor nail insertion depth, ensuring stability; To sum up: the worse the flatness of the ground, the deeper the anchor should be inserted. If the ground is well flat, the anchor does not need to be inserted too deep into the ground to maintain the stability of the device, and it is easier to remove the anchor when the device moves next time, which is convenient to use. When fixing the base bracket, the present invention can adjust the support angle of the supporting bar and the insertion depth of the anchor in real time according to the flatness of the ground, thereby ensuring the stability of the base bracket while avoiding excessive support angle of the supporting bar, occupying a large space, and avoiding excessive insertion of the anchor, which is time-consuming and labor-intensive to remove, affecting the next movement of the device.

[0015] (3) The base bracket is used to fix the magnetic field coil to align the axis with the geomagnetic direction, the steady-field magnetometer is used to detect geomagnetic fluctuations, the automatic steady-field circuit is used to lock the two uniform magnetic fields to the target value, and the standard magnetometer is used to test the accurate magnetic field value of the uniform area used for calibration. When implemented, ensure the effective operation of the magnetometer.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the base support and magnetic field assembly of the present invention; Figure 2 This is a schematic diagram of the structure of the base bracket, stabilizing assembly and supporting assembly of the present invention; Figure 3 It is a schematic diagram of the partial structure of the stabilizing assembly and the supporting assembly of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged schematic diagram; Figure 5 This is a schematic diagram of the structure of the stabilizing assembly of the present invention; Figure 6 This is a schematic diagram of the internal structure of the regulating box of the present invention; Figure 7 It is a schematic diagram of the internal structure of the fixing sleeve of the present invention. Description of the drawings: 10. Base bracket; 201. Magnetic field coil; 202. Stabilizing field magnetometer; 203. Automatic stabilizing field circuit; 204. Standard magnetometer; 301, level; 302, fixed hollow column; 303, supporting electric push rod; 304, supporting plate; 305, receiving sleeve; 306, piston rod; 401, support slash bar; 402, first hinge seat; 403, second hinge seat; 404, first oil telescopic rod; 405, fixing sleeve; 406, second oil telescopic rod; 407, anchor nail; 408, locking member; 50, regulating box; 501, internal electric push rod; 502, piston; 503, air cavity; 504, oil cavity; 60. Central control. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by those skilled in the art to which the present invention pertains. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] Example 1: Please refer to the attached drawings Figure 1 and Figure 2 A geomagnetic magnetometer calibration device includes a base bracket 10, a magnetic field component is arranged inside the base bracket 10, a stabilizing component is arranged at the bottom of the base bracket 10, and a supporting component connected to the base bracket 10 is arranged above the stabilizing component; the magnetic field component includes a magnetic field coil 201, a stabilizing magnetometer 202, an automatic stabilizing circuit 203 and a standard magnetometer 204, the magnetic field coil 201 is arranged around the base bracket 10 and forms a rectangular ring, and the stabilizing magnetometer 202, the automatic stabilizing circuit 203 and the standard magnetometer 204 are arranged inside the magnetic field coil 201.

[0023] The stabilizing field magnetometer 202 is specifically a self-excited optically pumped magnetometer, the automatic stabilizing field circuit 203 includes a phase detector, a reference frequency source, and a phase-locked loop circuit with feedback current output, and the standard magnetometer 204 is specifically a proton magnetometer. The setting of the stabilizing field magnetometer 202 and the automatic stabilizing field circuit 203 is beneficial to improve the convenience of carrying and testing the calibration device, thereby achieving the effect of improving the accurate measurement of magnetic field values at different measurement positions.

[0024] The magnetic field is used to generate two highly consistent uniform magnetic fields. The base bracket 10 is used to fix the magnetic field coil 201 so that its axis is aligned with the geomagnetic direction. The stabilizing field magnetometer 202 is used to detect geomagnetic fluctuations. The automatic stabilizing field circuit 203 is used to lock the two uniform magnetic fields to the target value. The standard magnetometer 204 is used to test the accurate magnetic field value of the uniform area used for calibration. In specific implementation, the magnetic field coil 201 is adjusted through the base bracket 10 so that the coil axis is roughly aligned with the geomagnetic direction. The stabilizing field magnetometer 202 is used to detect the geomagnetic field value and transmit it to the automatic stabilizing field circuit 203. The magnetic field is locked through a phase-locked loop. The standard magnetometer 204 is placed in the work area, and calibration, testing, comparison and other measurement work can be carried out.

[0025] Example 2: Please refer to the attached drawings Figure 2 The base bracket 10 is provided with a central control 60. By providing the central control 60, it is convenient to control the electrical components inside the device. The control circuit of the central control 60 can be realized by simple programming by those skilled in the art. It belongs to common knowledge in the art and is only used without modification. Therefore, the control method and circuit connection are not described in detail.

[0026] Please refer to the attached drawings Figure 3 and Figure 6 The stabilizing component includes a spirit level 301 and four groups of supporting electric push rods 303. A supporting plate 304 is installed at the lower end of each group of supporting electric push rods 303. Several accommodating sleeves 305 are provided on the supporting plate 304. A piston rod 306 slides inside each of the accommodating sleeves 305. An adjusting box 50 is provided on one side of each group of supporting electric push rods 303. An air cavity 503 and an oil cavity 504 are provided inside the adjusting box 50.

[0027] Please refer to the attached drawings Figure 3-Figure 6 The level 301 is mounted on the base support 10. Each of the four sets of supporting electric push rods 303 is provided with a fixed hollow column 302. The four sets of fixed hollow columns 302 are equidistantly distributed around the circumference of the base support 10 and are connected to the base support 10. The housing sleeves 305 are open downward, and two adjacent housing sleeves 305 are connected by connecting pipes. Each housing sleeve 305 is provided with a limit ring located below the connection between the connecting pipe and the housing sleeve 305.

[0028] An inner electric push rod 501 and a partition are respectively provided at the upper and lower ends of the regulating box 50. The air cavity 503 and the oil cavity 504 are located on both sides of the partition. Pistons 502 slide inside the air cavity 503 and the oil cavity 504. The lower end of the inner electric push rod 501 and the two pistons 502 are connected by a bracket, and the air cavity 503 and one of the accommodating sleeves 305 are connected by a connecting pipe.

[0029] When the base bracket 10 is moved to the point to be measured, the four groups of supporting electric push rods 303 are started. The four groups of supporting electric push rods 303 are raised and lowered, and the level meter 301 is observed to ensure that the base bracket 10 is level. After it is level, the four groups of supporting electric push rods 303 are closed. Next, the inner electric push rod 501 is started, and the inner electric push rod 501 pushes the two pistons 502 to move through the bracket, so that the gas inside the gas cavity 503 and the oil inside the oil cavity 504 enter the interior of each accommodating sleeve 305 and the interior of the second oil telescopic rod 406 respectively. The interior of the accommodating sleeve 305 continuously takes in air, thereby causing the piston rod 306 to move downward until each piston rod 306 contacts the ground, so that the piston rod 306 cannot move downward and the piston 502 cannot move. The greater the sum of the downward movement distances of each piston rod 306, the worse the flatness of the ground.

[0030] Example 3: Please refer to the attached drawings Figure 2-Figure 7 The support assembly includes four sets of support bars 401. A second hinged seat 403 is slidably mounted on each of the support bars 401. A first hydraulic telescopic rod 404 is hingedly mounted on the second hinged seat 403. The first hydraulic telescopic rod 404 and the hydraulic chamber 504 are connected via a connecting tube. A fixing sleeve 405 is connected to the bottom end of each support bar 401. A second hydraulic telescopic rod 406 is mounted within the fixing sleeve 405. The second hydraulic telescopic rod 406 is connected to the first hydraulic telescopic rod 404 via a flexible hose. The other end of the second hydraulic telescopic rod 406 is rotatably connected to an anchor 407. The upper end of each set of support bars 401 is hingedly mounted to a first hinged seat 402. The first and second hinged seats 402, 403 have identical structures and are both internally equipped with self-locking screws. The other end of the first hydraulic telescopic rod 404 is mounted to the base bracket 10 via a fixing seat. A locking member 408 is provided at the lower end of the side wall of the fixing sleeve 405 . The locking member 408 includes a mounting seat and a screw threadedly connected to the mounting seat and the fixing sleeve 405 .

[0031] The worse the ground is flat, the deeper the anchor 407 should be inserted. If the ground is relatively flat, the anchor 407 does not need to be inserted too deeply into the ground to maintain the stability of the device, and it is easier to remove the anchor 407 when the device is moved next time. As the second oil telescopic rod 406 extends, the original oil inside the second oil telescopic rod 406 will enter the first oil telescopic rod 404, causing the first oil telescopic rod 404 to extend, thereby continuously pushing the anchor 407 out of the fixing sleeve 405. The length of the anchor 407 outside the fixing sleeve 405 is the depth of the anchor 407 inserted into the ground. The worse the ground is flat, the deeper the anchor 407 is inserted, ensuring stability. Working principle: When the base bracket 10 is moved to the point to be measured, the four groups of supporting electric push rods 303 are started. The four groups of supporting electric push rods 303 are raised and lowered, and the level meter 301 is observed to ensure that the base bracket 10 is level. After it is level, the four groups of supporting electric push rods 303 are closed. Next, the inner electric push rod 501 is started, and the inner electric push rod 501 pushes the two pistons 502 to move through the bracket, so that the gas inside the gas cavity 503 and the oil inside the oil cavity 504 enter the interior of each accommodating sleeve 305 and the interior of the second oil telescopic rod 406 respectively. The interior of the accommodating sleeve 305 continuously takes in air, thereby causing the piston rod 306 to move downward until each piston rod 306 contacts the ground, making it impossible for the piston rod 306 to move downward, and the piston 502 is also unable to move. The greater the sum of the downward movement distances of the piston rods 306, the worse the flatness of the ground. As the piston rod 306 moves downward, the oil in the oil chamber 504 enters the second oil telescopic rod 406, causing the second oil telescopic rod 406 to extend, thereby allowing the support slash 401 to expand outward, providing a larger support angle and improving support stability. That is, the worse the ground flatness, the larger the support angle, ensuring stability. As the second oil telescopic rod 406 extends, the oil originally in the second oil telescopic rod 406 will enter the first oil telescopic rod 404, causing the first oil telescopic rod 404 to extend, thereby continuously pushing the anchor 407 out of the fixing sleeve 405. The length of the anchor 407 outside the fixing sleeve 405 is the depth of the anchor 407 into the ground. The worse the ground flatness, the deeper the anchor 407 is inserted, ensuring stability. Finally, the geomagnetic field value is detected by the stabilizing field magnetometer 202 and transmitted to the automatic stabilizing field circuit 203. The magnetic field is locked by the phase-locked loop, and the standard magnetometer 204 is placed in the working area to perform calibration, testing, comparison and other measurement work.

[0032] The above description of the present invention is exemplified in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A geomagnetic magnetometer calibration device, characterized in that: It comprises a base support (10), a magnetic field component is arranged inside the base support (10), a stabilizing component is arranged at the bottom of the base support (10), and a supporting component connected to the base support (10) is arranged above the stabilizing component; The stabilizing assembly includes a level (301) and four groups of supporting electric push rods (303), each group of the supporting electric push rods (303) is provided with a supporting plate (304) at the lower end, the supporting plate (304) is provided with a plurality of accommodating sleeves (305), each of the accommodating sleeves (305) has a piston rod (306) sliding inside, and each group of the supporting electric push rods (303) is provided with an adjusting box (50) on one side, and the adjusting box (50) is provided with an air cavity (503) and an oil cavity (504) inside. The support assembly comprises four groups of support slashes (401), a second hinge seat (403) is slidably mounted on the support slashes (401), a first oil telescopic rod (404) is hingedly connected to the second hinge seat (403), and the first oil telescopic rod (404) and the oil cavity (504) are connected via a connecting pipe; The bottom end of the support slash bar (401) is connected to a fixed sleeve (405), and a second oil telescopic rod (406) is provided inside the fixed sleeve (405). The second oil telescopic rod (406) is connected to the first oil telescopic rod (404) through a hose, and the other end of the second oil telescopic rod (406) is rotatably connected to an anchor nail (407).

2. A geomagnetic magnetometer calibration device according to claim 1, characterized in that: The magnetic field assembly comprises a magnetic field coil (201), a stabilizing field magnetometer (202), an automatic stabilizing field circuit (203) and a standard magnetometer (204); the magnetic field coil (201) is arranged around a base support (10) to form a rectangular ring; the stabilizing field magnetometer (202), the automatic stabilizing field circuit (203) and the standard magnetometer (204) are arranged inside the magnetic field coil (201).

3. The geomagnetic magnetometer calibration device according to claim 1, characterized in that: A central control (60) is provided on the base bracket (10).

4. The geomagnetic magnetometer calibration device according to claim 1, characterized in that: The level (301) is mounted on a base bracket (10), and fixed hollow columns (302) are provided outside the four groups of supporting electric push rods (303). The four groups of fixed hollow columns (302) are equidistantly distributed around the base bracket (10), and the four groups of fixed hollow columns (302) are connected to the base bracket (10).

5. The geomagnetic magnetometer calibration device according to claim 1, characterized in that: The accommodating sleeve (305) opens downwards, and two adjacent accommodating sleeves (305) are connected via connecting pipes. A limiting ring is provided inside each accommodating sleeve (305), and the limiting ring is located below the connection port between the connecting pipe and the accommodating sleeve (305).

6. The geomagnetic magnetometer calibration device according to claim 1, characterized in that: An inner electric push rod (501) and a partition are respectively provided at the upper and lower ends of the regulating box (50), the air cavity (503) and the oil cavity (504) are located on both sides of the partition, pistons (502) are slidably arranged inside the air cavity (503) and the oil cavity (504), the lower end of the inner electric push rod (501) and the two pistons (502) are connected via a bracket, and the air cavity (503) and one of the accommodating sleeves (305) are connected via a connecting pipe.

7. The geomagnetic magnetometer calibration device according to claim 1, characterized in that: The upper end of each group of support bars (401) is hinged to a first hinge seat (402), the first hinge seat (402) and the second hinge seat (403) have the same structure, and are both provided with self-locking screws inside, and the other end of the first oil telescopic rod (404) is mounted on the base bracket (10) through a fixed seat.

8. The geomagnetic magnetometer calibration device according to claim 1, characterized in that: A locking member (408) is provided at the lower end of the side wall of the fixing sleeve (405), and the locking member (408) comprises a mounting seat and a screw threadedly connected to the mounting seat and the fixing sleeve (405).

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