CN210954363U - Full-parameter ocean geomagnetic daily variation station - Google Patents
Full-parameter ocean geomagnetic daily variation station Download PDFInfo
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- CN210954363U CN210954363U CN201922291965.1U CN201922291965U CN210954363U CN 210954363 U CN210954363 U CN 210954363U CN 201922291965 U CN201922291965 U CN 201922291965U CN 210954363 U CN210954363 U CN 210954363U
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Abstract
The utility model discloses a full parameter ocean geomagnetic daily variable station, full parameter ocean geomagnetic daily variable station includes proton magnetometer, fluxgate sensor, slope sensor, sleeve and directional fin, directional fin pass through the clamp with the muffjoint, proton magnetometer, fluxgate sensor and slope sensor all set up in the sleeve, proton magnetometer is used for measuring the total amount of geomagnetic field, fluxgate sensor and slope sensor are used for measuring the weight of geomagnetic field, the utility model discloses an be provided with proton magnetometer, can accurately measure the total amount of geomagnetic field, fluxgate sensor combines slope sensor can measure the weight of geomagnetic field, in addition, install directional fin in the outside of sleeve additional, directional fin can suitably adjust the gesture of sleeve, makes the sleeve be in the state of head-on flow all the time in the ocean, reduces the rotation of proton magnetometer measurement direction effectively, thereby making the measurement of the proton magnetometer more stable.
Description
Technical Field
The utility model relates to a geomagnetic field measures technical field, especially relates to a full parameter ocean earth magnetism station of changing day.
Background
At present, the ocean geomagnetic diurnal station in China mainly adopts an Overhauser proton magnetometer, and by utilizing the advantages of the precision and the resolution of the Overhauser proton magnetometer, the daily variation measurement can be well met, but in the use of the ocean geomagnetic station imported by Marinemagnetics company imported from Canada, the situation of missing throwing data in a certain proportion occurs. On the other hand, the Overhauser proton magnetometer can only measure the total amount of geomagnetism, and can not obtain the total elements of the geomagnetism, so that the proton magnetometer is far behind the western countries in this respect, and the value of the proton magnetometer on ocean magnetic field data is greatly reduced.
In addition, the proton magnetometer has a polarization process in the working process, which requires a stable magnetic field, and when the proton magnetometer is in a rotating state, the direction of the magnetic field sensed by the proton magnetometer is greatly changed, which may cause unstable measurement of the proton magnetometer.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art not enough, the utility model aims to provide a full parameter ocean earth magnetism station of changing daily, it is through being provided with proton magnetometer, can measure the geomagnetic field total amount accurately, fluxgate sensor combines the component that inclination sensor can measure geomagnetic field, install directional tail wing additional in telescopic outside, directional tail wing can suitably adjust telescopic gesture, make the sleeve be in the state of meeting the current all the time in the ocean, reduce the rotation of proton magnetometer direction of measurement effectively, thereby make the measurement of proton magnetometer more stable.
The utility model discloses the technical scheme who adopts as follows:
the utility model provides a full parameter ocean earth magnetism day becomes station, includes proton magnetometer, fluxgate sensor, inclination sensor, sleeve and directional fin, directional fin pass through the clamp with muffjoint, proton magnetometer, fluxgate sensor and inclination sensor all set up in the sleeve, proton magnetometer is used for measuring the total amount of geomagnetic field, fluxgate sensor and inclination sensor are used for measuring the value of the three-component of geomagnetic field.
Furthermore, a data acquisition and storage module is arranged in the sleeve, the proton magnetometer, the fluxgate sensor and the inclination sensor are respectively connected with the data acquisition and storage module, and the data acquisition and storage module is used for acquiring and storing data of the proton magnetometer, the fluxgate sensor and the inclination sensor.
Furthermore, a power supply module is arranged in the sleeve, the proton magnetometer, the fluxgate sensor, the inclination sensor and the data acquisition and storage module are respectively connected with the power supply module, and the power supply module is used for supplying power to the proton magnetometer, the fluxgate sensor, the inclination sensor and the data acquisition and storage module.
Further, the fluxgate sensor and the tilt sensor are both disposed at the top of the sleeve, and the fluxgate sensor and the tilt sensor are disposed on the same horizontal plane.
Further, the clamp includes first clamp and second clamp, telescopic a pot head is established in the first clamp, another pot head is established in the second clamp, be provided with on the first clamp and supply directional fin male first draw-in groove, be provided with on the second clamp and supply directional fin male second draw-in groove, first draw-in groove with directional fin passes through the screw connection, the second draw-in groove with directional fin passes through the screw connection.
Further, full parameter ocean geomagnetism daily change station still includes the hawser, first clamp is kept away from one side of first draw-in groove is provided with first through-hole, the second clamp is kept away from one side of second draw-in groove is provided with the second through-hole, first clamp and second clamp are fixed respectively on the hawser, the one end of hawser is connected with the anchor block, and the other end is connected with deep sea glass floater.
Further, the sleeve is a non-metal shell sleeve, a watertight joint is arranged on the sleeve, and the watertight joint is a 5-core watertight joint.
Further, the proton magnetometer adopts OVERHAUSER series proton magnetometer, the fluxgate sensor adopts SiAn Shun measuring equipment, LLC HSF100 series fluxgate sensor, and the tilt sensor adopts North micro sensing technology, Inc. BW-WS2000 series tilt sensor.
Compared with the prior art, the beneficial effects of the utility model reside in that, directional fin pass through the clamp with muffjoint, proton magnetometer, fluxgate sensor and tilt sensor all set up in the sleeve, proton magnetometer is used for measuring the total amount of geomagnetic field, fluxgate sensor measures the value of the three-component of geomagnetic field with tilt sensor, the utility model discloses a be provided with proton magnetometer, can measure the geomagnetic field total amount accurately, fluxgate sensor combines tilt sensor can measure the component of geomagnetic field, in addition, installs directional fin additional in telescopic outside, and directional fin can suitably adjust telescopic gesture for the sleeve is in the state of meeting the current all the time in the ocean, reduces the rotation of proton magnetometer direction of measurement effectively, thereby makes proton magnetometer's measurement more stable.
Drawings
The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the sleeve, the directional tail and the clamp of the present invention.
Fig. 3 is a schematic structural view of the first clamp of the present invention.
Fig. 4 is a schematic structural view of the second clamp of the present invention.
Fig. 5 is a graph showing the variation of magnetic field deviation with angular deviation.
Fig. 6 illustrates the transformation between the fluxgate sensor coordinate system and the tilt sensor coordinate system according to the present invention.
In the figure: the device comprises a 1-proton magnetometer, a 2-fluxgate sensor, a 3-inclination sensor, a 4-sleeve, a 5-directional empennage, a 7-data acquisition and storage module, an 8-power module, a 61-first clamp, a 62-second clamp, a 91-cable, a 92-anchor block, a 93-deep sea glass floating ball, a 611-first clamping groove, a 612-first through hole, a 621-second clamping groove and a 622-second through hole.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 4, the full-parameter marine geomagnetic diurnal variation station includes a proton magnetometer 1, a fluxgate sensor 2, an inclination sensor 3, a sleeve 4 and a directional tail wing 5, wherein the directional tail wing 5 is connected with the sleeve 4 through a hoop, the proton magnetometer 1, the fluxgate sensor 2 and the inclination sensor 3 are all disposed in the sleeve 4, the proton magnetometer 1 is used for measuring the total amount of a geomagnetic field, and the fluxgate sensor 2 and the inclination sensor 3 are used for obtaining the values of three components of the geomagnetic field according to the measurement method of the geomagnetic field component. Preferably, the sleeve 4 is a non-metallic housing sleeve.
This embodiment can accurately measure the total amount of the geomagnetic field by being provided with the proton magnetometer 1, and the fluxgate sensor 2 can measure the component of the geomagnetic field by combining the tilt sensor 3, and in addition, the directional tail wing 5 is additionally installed outside the sleeve 4, and the posture of the sleeve 4 can be properly adjusted by the directional tail wing 5, so that the sleeve 4 is always in an incident state in the ocean, the rotation of the measurement direction of the proton magnetometer 1 is effectively reduced, and the measurement of the proton magnetometer 1 is more stable.
Specifically, the proton magnetometer 1 adopts an OVERHAUSER series proton magnetometer, and the specific parameters of the proton magnetometer 1 are as follows: the range is 18000nT-120000nT, the absolute precision is 0.2nT, the sensitivity is 0.015nT/rt-HZ, the resolution is 0.001nT, and the gradient tolerance is more than 10000 nT/m.
Specifically, the fluxgate sensor 2 is a fluxgate sensor of HSF100 series, which is a finite element company of water measuring equipment, and specific parameters of the fluxgate sensor 2 are as follows: the measurement mode is three components, and the measurement range is as follows: 70uT, the triaxial magnetic orthogonality degree is better than 0.2 degree, the measurement resolution is 0.1nT, and the linearity is better than 0.01 percent.
Specifically, the tilt sensor 3 is a BW-WS2000 series tilt sensor of north micro sensing technology ltd, and specific parameters of the tilt sensor 3 are as follows: the precision is 0.001 degree, the resolution is 0.0007 degree, the measuring axes are an X axis and a Y axis, and the measuring range is +/-30 degrees.
The proton magnetometer 1 can accurately measure the geomagnetic modulus, the absolute accuracy reaches 0.2nT, the fluxgate sensor 2 can perform vector measurement, and the measurement resolution can reach 0.1nT, but the fluxgate sensor 2 has errors of three aspects of triaxial orthogonality, axial sensitivity and zero drift, and the component data of the fluxgate sensor 2 can be corrected by using the module value data of the proton magnetometer 1 and the fluxgate sensor 2 and converted into a standard coordinate system, and finally the magnetic measurement data is converted into a geographic coordinate system, namely the northeast of China, from the standard coordinate system by combining the data of the tilt sensor 3. Assuming that the geomagnetic mode value is 50000nT, the variation curve of the magnetic field measurement deviation along with the angle deviation of the measurement axis is shown in FIG. 5.
As can be seen from fig. 5, in order to ensure that the measurement deviation is less than 5nT, the measurement angle deviation cannot be greater than 0.00573 ° because the present embodiment satisfies this index requirement with the tilt sensor 3 having an accuracy of 0.003 °.
Specifically, a data acquisition and storage module 7 is arranged in the sleeve 4, the proton magnetometer 1, the fluxgate sensor 2 and the tilt sensor 3 are respectively connected with the data acquisition and storage module 7, and the data acquisition and storage module 7 is used for acquiring and storing data of the proton magnetometer 1, the fluxgate sensor 2 and the tilt sensor 3. Preferably, a large-capacity SD card is provided in the data acquisition and storage module 7, the SD card can store a large amount of data, and after the full-parameter marine geomagnetic daily change station is recovered, the data in the data acquisition and storage module 7 is read by the upper computer.
Specifically, a power module 8 is arranged in the sleeve 4, the proton magnetometer 1, the fluxgate sensor 2, the tilt sensor 3 and the data acquisition and storage module 7 are respectively connected with the power module 8, and the power module 8 is used for supplying power to the proton magnetometer 1, the fluxgate sensor 2, the tilt sensor 3 and the data acquisition and storage module 7. Preferably, a lithium battery is arranged inside the power module 8 and used for supplying power to the proton magnetometer 1, the fluxgate sensor 2, the tilt sensor 3 and the data acquisition and storage module 7.
Specifically, the fluxgate sensor 2 and the tilt sensor 3 are both disposed at the top of the sleeve 4, and the fluxgate sensor 2 and the tilt sensor 3 are disposed at the same horizontal plane, so that the axis alignment of the tilt sensor 3 and the fluxgate sensor 2 can be ensured.
Specifically, be provided with first backup pad, second backup pad and third backup pad in the sleeve 4, the first space of placing is constituteed with first backup pad in the top of sleeve 4, and the space is placed to the second is constituteed to sleeve 4, first backup pad and second backup pad, and the space is placed to the third is constituteed to sleeve 4, second backup pad and third backup pad, and the fourth space of placing is constituteed to the bottom of sleeve 4 and third backup pad. Preferably, the fluxgate sensor 2 and the tilt sensor 3 are disposed in the first placement space, the data acquisition and storage module 7 is disposed in the second placement space, the power module 8 is disposed in the third placement space, and the proton magnetometer 1 is disposed in the fourth placement space.
Specifically, the clamp includes first clamp 61 and second clamp 62, a pot head of sleeve 4 is established in first clamp 61, another pot head is established in the second clamp 62, be provided with on the first clamp 61 and supply directional fin 5 male first draw-in groove 611, be provided with on the second clamp 62 and supply directional fin 5 male second draw-in groove 621, first draw-in groove 611 with directional fin 5 passes through the screw connection, second draw-in groove 621 with directional fin 5 passes through the screw connection.
Specifically, full parameter ocean geomagnetism daily change station still includes hawser 91, first clamp 61 is kept away from one side of first draw-in groove 611 is provided with first through-hole 612, second clamp 62 is kept away from one side of second draw-in groove 621 is provided with second through-hole 622, first clamp 61 and second clamp 62 are fixed respectively on hawser 91, the one end of hawser 91 is connected with anchor block 92, and the other end is connected with deep sea glass floater 93.
In particular, the sleeve 4 is provided with a watertight joint. Preferably, the watertight joint is a 5-core watertight joint.
The calibration of the full-parameter marine geomagnetic diurnal variation station is divided into self-calibration of the fluxgate sensor 2 and conversion between a physical coordinate system where the fluxgate sensor 2 is located and a geographical coordinate system, the fluxgate sensor 2 needs to be self-calibrated first, and then the physical coordinate system where the fluxgate sensor 2 is located and the geographical coordinate system need to be converted, wherein:
(1) self-calibration of fluxgate sensor 2
When the non-orthogonal error, the sensitivity error and the zero offset error of the fluxgate sensor 2 act on the tilt sensor 3 at the same time, a certain deviation exists between the measured result and the actual result, and in order to ensure the accuracy of the measured data, the errors need to be analyzed and corrected.
Wherein: b isx0、By0And Bz0The three-axis output magnetic field values of the fluxgate sensor 2 are respectively; b isx、ByAnd BzThe actual magnetic field values of the earth magnetic field on the orthogonal axes, α, β and gamma are the angle errors between the three axes and the orthogonal axes of the fluxgate sensor 2, respectively, Kx、KyAnd KzThe sensitivities of the fluxgate sensor 2 on the three axes are respectively; bx，byAnd bzIs the zero offset error of the three axes of the fluxgate sensor 2.
The mode value of the earth magnetism at a certain time can be measured by the proton magnetometer 1 and is considered to be an accurate quantity, which is represented by Const, and the following equation can be established by neglecting the second order infinitesimal quantity:
that is, by using the proton magnetometer 1 to measure Const at N moments and using the fluxgate sensor 2 to measure N magnetic field data at the same position as and corresponding to the proton magnetometer 1, N equation sets having the above formula can be obtained, and when the number of the equation sets is larger than the number of unknown coefficients, the angle errors α, β and γ between the three axes and the orthogonal axis of the fluxgate sensor 2, the sensitivity of the three axes of the fluxgate sensor 2, K, can be obtained by using the least square methodx、KyAnd KzZero offset error b of three axes of fluxgate sensor 2x、byAnd bzTherefore, the three-component magnetic field data measured by the fluxgate sensor 2 can be accurately represented on the three axes of the standard orthogonal coordinate system.
(2) Conversion between physical and geographic coordinate systems
In actual measurement, the physical coordinate system changes with the carrier platform, and needs to be converted into a geographic coordinate system. The rotation from the ground coordinate system xyz to the tilted plane coordinate system x ' y ' z ' can be described by two elementary rotation matrices:
the first fundamental rotation matrix being around itself an inclined planar coordinate systemx-axis rotation angle α1Formed, then the rotation matrix is represented as:
the second basic rotation matrix is the y-axis rotation angle α of the tilted planar coordinate system about itself after the first rotation of the coordinate system2Formed, then the rotation matrix is represented as:
suppose that the projection value of the gravitational acceleration on the inclined plane on which the inclination sensor 3 is located is Ax,AyAnd AzThen the acceleration of gravity may pass through the first rotation angle α1And a second angle of rotation α2The projection of the coordinate system on the inclined plane is obtained, and the rotation matrix is expressed as:
the tilt sensor 3 can obtain the first rotation angle α through the rotation matrix1And a second angle of rotation α2The size of (2). The conversion of the fluxgate sensor 2 measurement into the geographical coordinate system also satisfies the above-mentioned conversion.
In practical applications, there may also be a rotation around the z-axis, assuming that the tilted planar coordinate system is rotated for the third time α around its own z-axis3Then the rotation matrix is expressed as:
thereby obtaining three-component output B of the measured geomagnetic field under the geographic coordinate systemx',By' andBz'：
the inclination sensor is a BW-WS2000 series of North micro-sensing technology and technology company, belonging to biaxial inclination measurement, and the rotation angle around the z axis is α3By an angle α rotated about the x-axis1And angle of rotation α about the y-axis2It is ensured that the calibrated z component output is converted into a z component value in the geographic coordinate system, i.e. Bz'＝Bz. And finally, acquiring the geomagnetic declination D of the point to be measured by combining the local longitude and latitude, thereby obtaining an x component value B under a geographic coordinate system by utilizing the sine and cosine theoremx' and y component value By' conversion of the values of the three components of the magnetic field of the calibrated fluxgate sensor 2 from the physical coordinate system to the geographical coordinate system is achieved.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.
Claims (8)
1. The utility model provides a full parameter ocean earth magnetism day becomes station which characterized in that: including proton magnetometer (1), fluxgate sensor (2), inclination sensor (3), sleeve (4) and orientation fin (5), orientation fin (5) pass through the clamp with sleeve (4) are connected, proton magnetometer (1), fluxgate sensor (2) and inclination sensor (3) all set up in sleeve (4), proton magnetometer (1) is used for measuring the total amount of geomagnetic field, fluxgate sensor (2) and inclination sensor (3) are used for measuring the value of the three-component of geomagnetic field.
2. The holonomic-parametric marine geomagnetic diurnal station of claim 1, wherein: the proton magnetometer is characterized in that a data acquisition and storage module (7) is arranged in the sleeve (4), the proton magnetometer (1), the fluxgate sensor (2) and the inclination sensor (3) are respectively connected with the data acquisition and storage module (7), and the data acquisition and storage module (7) is used for acquiring and storing data of the proton magnetometer (1), the fluxgate sensor (2) and the inclination sensor (3).
3. The holonomic-parametric marine geomagnetic diurnal station of claim 2, wherein: the device is characterized in that a power supply module (8) is arranged in the sleeve (4), the proton magnetometer (1), the fluxgate sensor (2), the inclination sensor (3) and the data acquisition and storage module (7) are respectively connected with the power supply module (8), and the power supply module (8) is used for supplying power for the proton magnetometer (1), the fluxgate sensor (2), the inclination sensor (3) and the data acquisition and storage module (7).
4. The holonomic-parametric marine geomagnetic diurnal station of claim 3, wherein: the fluxgate sensor (2) and the inclination sensor (3) are both arranged at the top of the sleeve (4), and the fluxgate sensor (2) and the inclination sensor (3) are arranged on the same horizontal plane.
5. The holonomic-parametric marine geomagnetic diurnal station of claim 3, wherein: the clamp includes first clamp (61) and second clamp (62), a pot head of sleeve (4) is established in first clamp (61), another pot head is established in second clamp (62), be provided with on first clamp (61) and supply directional fin (5) male first draw-in groove (611), be provided with on second clamp (62) and supply directional fin (5) male second draw-in groove (621), first draw-in groove (611) with directional fin (5) pass through the screw connection, second draw-in groove (621) with directional fin (5) pass through the screw connection.
6. The holonomic-parametric marine geomagnetic diurnal station of claim 5, wherein: still include hawser (91), keep away from first clamp (61) one side of first draw-in groove (611) is provided with first through-hole (612), keep away from second clamp (62) one side of second draw-in groove (621) is provided with second through-hole (622), first clamp (61) and second clamp (62) are fixed respectively on hawser (91), the one end of hawser (91) is connected with anchor block (92), and the other end is connected with deep sea glass floater (93).
7. The holonomic-parametric marine geomagnetic diurnal station of claim 3, wherein: the sleeve (4) is a non-metal shell sleeve, a watertight joint is arranged on the sleeve (4), and the watertight joint is a 5-core watertight joint.
8. The holonomic-parametric marine geomagnetic diurnal station of claim 3, wherein: the proton magnetometer (1) adopts OVERHAUSER series proton magnetometer, the fluxgate sensor (2) adopts SiAn Shun measuring equipment, LLC HSF100 series fluxgate sensor, and the tilt sensor (3) adopts North micro-sensing technology, LLC BW-WS2000 series tilt sensor.
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| CN201922291965.1U CN210954363U (en) | 2019-12-18 | 2019-12-18 | Full-parameter ocean geomagnetic daily variation station |
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| CN201922291965.1U CN210954363U (en) | 2019-12-18 | 2019-12-18 | Full-parameter ocean geomagnetic daily variation station |
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