CN106443603B - Corner reflector with pointing measurement reference and special pointing measurement equipment - Google Patents
Corner reflector with pointing measurement reference and special pointing measurement equipment Download PDFInfo
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- CN106443603B CN106443603B CN201610815279.8A CN201610815279A CN106443603B CN 106443603 B CN106443603 B CN 106443603B CN 201610815279 A CN201610815279 A CN 201610815279A CN 106443603 B CN106443603 B CN 106443603B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/904—SAR modes
- G01S13/9076—Polarimetric features in SAR
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A corner reflector with a pointing measurement reference and a special pointing measurement device relate to the remote sensing calibration technology and comprise a corner reflector with a pointing measurement reference and a special pointing measurement device for the corner reflector. The corner reflector with the pointing measurement reference is provided with an accurate pointing measurement reference accessory for various traditional corner reflectors, so that the pointing measurement operation is more convenient, and the result is more accurate. The special directional measuring equipment for the corner reflector integrates azimuth directional measurement and pitching directional measurement instruments, and is provided with a measurement interface with the corner reflector with a directional measurement reference, so that the measurement process is quicker and more convenient, and the measurement result is more accurate and reliable. The corner reflector with the pointing measurement reference and the special pointing measurement equipment are suitable for tests of high-precision radiometric calibration, polarization calibration, SAR system quality evaluation and the like of various satellite-borne and airborne SAR systems.
Description
Technical Field
The invention relates to the technical field of remote sensor calibration, in particular to a corner reflector with a pointing measurement datum and a special pointing measurement device, which can be used for ground test equipment and equipment fine layout adjustment of SAR high-precision radiometric calibration and polarization calibration and SAR radiation and polarization quality evaluation, and can also be used for SAR geometric and interference calibration and quality evaluation tests.
Background
The SAR calibration measures an antenna directional diagram, a total transfer function (calibration constant), polarization calibration and interference calibration parameters of the SAR system by taking a ground known target as a standard reference source, and the ground known target is also taken as the standard reference source in the quality assessment of the SAR system and images so as to analyze and assess radiation, geometry, polarization and interference accuracy. The commonly used standard reference targets are point targets and distribution targets. The methods of SAR scaling and quality assessment are therefore divided into point-based methods and distributed-target-based methods. The method based on the distributed target can obtain higher precision corresponding to radiation calibration and quality evaluation, but the method based on the point target is still the main method due to the extremely difficult acquisition of the uniformly distributed target with large area and known scattering characteristics, the poor stability of the scattering characteristics of the distributed target and other factors. For calibration and quality assessment of geometry, polarization, interference and the like of the SAR, the method based on the point target is rather irreplaceable due to the controllability of the point target.
For standard point target simulation of the SAR image, there are two methods, namely, an active scaler and a corner reflector. The active scaler can provide a reference point target of a large RCS (radar cross-sectional area value), can be used as a receiver to receive SAR emission pulses, and has important application, but because the active scaler is high in cost and complex in use and operation, the active scaler is suitable for fixed wave bands and bandwidth after being developed, and needs to be regularly calibrated to ensure precision, so that the use number and the application range of the active scaler are greatly limited, and the requirements of a large amount of frequent scaling and quality evaluation tests are difficult to meet.
The corner reflector serving as the SAR image standard reference point target has the advantages of large RCS (radar cross-sectional area value), stable performance, no limitation of wave bands, simplicity in processing, low cost and the like, and is widely used in ground calibration and quality evaluation tests. However, during the external field test, the number of the corner reflectors is large (generally more than 10, even more than 30), and the workload of the azimuth pitching pointing adjustment is large; due to the characteristics of the target corner reflector, the pointing adjustment precision is not high in the severe environment in the field, the calibration precision and the calibration effect are affected, the success rate of the test is affected to a certain degree, the workload of the test is increased, and the application requirements of a large number of ground tests are difficult to adapt.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a corner reflector with a pointing measurement reference and a special pointing measurement device.
(II) technical scheme
The invention provides a corner reflector with a pointing measurement reference, comprising: the three measuring datum planes are positioned in the same space plane, the plane of the three measuring datum planes is parallel to the reference plane of the corner reflector or is positioned in the same space plane, the first measuring datum plane 1-2 and the second measuring datum plane 1-5 are respectively positioned at two ends of one side edge of the reference plane and are respectively provided with a first positioning hole 1-3 and a second positioning hole 1-6, the connecting line of the two positioning holes is parallel to the side edge, the third measuring datum plane 1-4 is positioned on the reference plane and has a certain distance with the side edge, and the connecting line of the center of the third measuring datum plane and the midpoint of the side edge is perpendicular to the side edge.
The invention also provides a special direction measuring device with a corner reflector of a direction measuring reference, which comprises: the corner reflector with the pointing measurement reference, the connecting rod 2-1, the first GNSS signal receiving antenna 2-2, the second GNSS signal receiving antenna 2-5, the first positioning pin 2-3, the second positioning pin 2-4 and the azimuth pitching pointing measurement instrument 2-6 are positioned on the connecting rod; the first GNSS signal receiving antenna 2-2 and the second GNSS receiving antenna 2-5 are arranged at two ends of the connecting rod, the first positioning pin 2-3 and the second positioning pin 2-4 are positioned on a connecting line of phase centers of the first GNSS signal receiving antenna and the second GNSS receiving antenna, the azimuth elevation direction measuring instrument 2-6 is provided with a positioning surface 2-7, and the positioning surface 2-7 and the bottoms of the first positioning pin 2-3 and the second positioning pin 2-4 are positioned on the same spatial plane and used for determining an installation reference surface of special direction measuring equipment for the corner reflector; the positions and the sizes of the first positioning pin and the second positioning pin are matched with the two positioning holes of the corner reflector, the position of the positioning surface corresponds to a third measurement reference surface of the corner reflector, the first positioning pin 2-3 and the second positioning pin 2-4 are arranged in the first positioning hole 1-3 and the second positioning hole 1-6 of the corner reflector, and the positioning surface 2-7 is arranged on the third measurement reference surface 1-4 of the corner reflector, so that the butt joint of the special pointing measurement equipment and the corner reflector is realized.
(III) advantageous effects
According to the technical scheme, the corner reflector with the pointing measurement reference and the special pointing measurement equipment have the following beneficial effects:
(1) the corner reflector can form a pointing measurement reference only by processing three measurement reference surfaces on the bottom surface, and has simple structure and low cost;
(2) the special direction measuring equipment for the corner reflector is matched with the corner reflector with the direction measuring reference to provide absolute direction and absolute pitching direction, the direction measuring precision of the corner reflector is high, and the direction and pitching absolute direction measuring precision of the corner reflector can generally reach within 0.2 degrees;
(3) the special pointing measurement equipment for the corner reflector has strong field environment adaptability, is convenient and quick to use and operate, can conveniently perform pointing measurement in a field test, saves pointing adjustment time, and facilitates field operation and test preparation of workers;
(4) the measurement mode is flexible, the pointing measurement equipment can be installed on the corner reflector for measurement, the result is directly displayed, the pointing measurement equipment can also be installed on the corner reflector according to the pointing requirement needed to be set by the corner reflector, the pointing result value is observed while the pointing of the corner reflector is adjusted until the display result reaches the adjustment target.
(5) The corner reflector with the pointing measurement reference and the special pointing measurement equipment adapt to the requirements of external field test experiments and application experiments of future SAR systems.
Drawings
FIG. 1 is a schematic bottom view of a corner reflector with a bottom surface in the form of an isosceles right triangle according to an embodiment of the present invention;
FIG. 2 is a bottom view of a rectangular-shaped corner reflector according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a pointing measurement device according to an embodiment of the present invention.
[ notation ] to show
1-1 bottom surface; 1-2 a first measurement datum; 1-3 first locating holes; 1-4 a third measurement datum plane; 1-5 second measuring reference surface; 1-6 second positioning holes;
2-1 connecting rod; 2-2 a first GNSS signal receiving antenna; 2-3 a first locator pin; 2-4 second locating pins; 2-5 a second GNSS signal receiving antenna; 2-6 azimuth pitching directional measuring instruments; 2-7, positioning surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
A first embodiment of the present invention provides a corner reflector with a pointing measurement reference, including: the three measuring datum planes are parallel to a reference plane of the corner reflector or are positioned on the same space plane, wherein a first measuring datum plane 1-2 and a second measuring datum plane 1-5 are respectively positioned at two ends of one side edge of the reference plane and are respectively provided with a first positioning hole 1-3 and a second positioning hole 1-6, the connecting line of the two positioning holes is parallel to the side edge, a third measuring datum plane 1-4 is positioned on the reference plane and has a certain distance with the side edge, the connecting line of the center of the third measuring datum plane and the midpoint of the side edge is vertical to the side edge, and the central points of the first measuring datum plane, the second measuring datum plane and the third measuring datum plane are not on the same straight line.
As shown in fig. 1, the bottom surface of a corner reflector is an isosceles right triangle, and the corner reflector may be a three-sided triangle reflector; the bottom surface 1-1 of the corner reflector is used as a reference surface, a first measuring reference surface 1-2 and a second measuring reference surface 1-5 are positioned at two ends of a bevel edge of the bottom surface, the center of a third measuring reference surface is positioned on the middle line of the bevel edge and has a certain distance with the side edge, the first, second and third measuring reference surfaces 1-2, 1-5 and 1-4 and the bottom surface 1-1 are positioned in the same spatial plane, and the central connecting line of the two positioning holes 1-3 and 1-6 is parallel to the bevel edge of the bottom surface 1-1 of the corner reflector.
As shown in fig. 2, the bottom surface of a corner reflector with a rectangular bottom surface is illustrated schematically, and the corner reflector may be a three-sided rectangular reflector or a two-sided rectangular reflector; the rectangular bottom surface 1-1 is used as a reference surface, and the first measuring reference surface 1-2 and the second measuring reference surface 1-5 are positioned at two ends of the side edge of the bottom surface, and the side edge is parallel to the intersection line of the bottom surface 1-1 and other surfaces.
In other embodiments, the corner reflector may be other types of corner reflectors, and is not limited to the above. The corner reflector with the pointing measurement datum is made of metal materials, the reference surface and the measurement datum surface can be made of the same metal materials, the three measurement datum surfaces and the reference surface are integrally formed, and the three measurement datum surfaces can also be fixed on the reference surface through a welding process; the reference surface and the measuring reference surface can also be made of different metal materials, and the three measuring reference surfaces are fixed on the reference surface through a welding process.
Preferably, the first, second and third measuring reference surfaces are high-precision planes; the distance between the third measurement reference surface 1-4 and the side edge is 10cm-20 cm; the first and second positioning holes 1-3, 1-6 are opened at the center positions of the first and second measuring reference surfaces 1-5.
The first embodiment of the invention provides a corner reflector with a pointing direction measuring reference, three measuring reference surfaces are positioned in the same space plane, and the space plane and the pointing direction of the corner reflector have a determined relationship, so that the pointing direction of the corner reflector can be reflected and used as the reference for the pointing direction measurement of the corner reflector. The direction of the connecting line of the centers of the positioning holes of the first and second measurement datum planes reflects the azimuth direction of the corner reflector and is used as a datum for measuring an azimuth angle; and the straight line which passes through the center of the third measurement datum plane and is perpendicular to the connecting line of the centers of the two positioning holes reflects the pitching direction of the corner reflector and is used as a datum for measuring the pitching angle.
The corner reflector with the pointing measurement datum in the first embodiment of the invention has a simple structure and low cost, and the pointing measurement datum can be formed only by processing three measurement datum surfaces on the bottom surface.
Referring to fig. 3, a second embodiment of the present invention provides a dedicated directivity measurement apparatus with a corner reflector of a directivity measurement reference, including: a connecting rod 2-1, a first GNSS signal receiving antenna 2-2, a second GNSS signal receiving antenna 2-5, a first locating pin 2-3, a second locating pin 2-4 and an azimuth elevation direction measuring instrument 2-6 which are positioned on the connecting rod, the first GNSS receiving antenna 2-2 and the second GNSS receiving antenna 2-5 are arranged at two ends of the connecting rod, the azimuth elevation direction measuring instrument 2-6 is provided with a positioning surface 2-7, the first positioning pin 2-3 and the second positioning pin 2-4 are positioned on a connecting line of phase centers of the first GNSS signal receiving antenna and the second GNSS signal receiving antenna, and the positioning surface 2-7 and bottoms of the first positioning pin 2-3 and the second positioning pin 2-4 are positioned on the same spatial plane and used for determining an installation reference surface of the direction measuring equipment; the positions and the sizes of the first positioning pin and the second positioning pin are matched with the two positioning holes of the corner reflector, the position of the positioning surface corresponds to a third measurement reference surface of the corner reflector, the first positioning pin 2-3 and the second positioning pin 2-4 can be installed in the two positioning holes of the corner reflector, and the positioning surface 2-7 is opposite to and placed on the third measurement reference surface of the corner reflector, so that the butt joint of the pointing measurement equipment and the corner reflector is realized.
Preferably, the connecting rod is a connecting piece pointing to each component of the measuring equipment, and comprises a connecting piece body and a GNSS signal transmission line, and the length of the connecting rod can be adjusted as required so as to meet the requirements of different azimuth pointing accuracy and measurement installation; the first GNSS signal receiving antenna 2-2 is a GNSS signal main receiving antenna, the second GNSS signal receiving antenna 2-5 is a slave receiving antenna, and can receive navigation positioning signals emitted by navigation satellite systems such as GPS, Beidou, GLONASS, Galileo and the like; the azimuth elevation direction measuring instrument 2-6 is integrated with a double-antenna GNSS direction finder and a high-precision inclinometer, and a GNSS signal transmission line is connected to the double-antenna GNSS direction finder; the azimuth pitching direction measuring instrument 2-6 is also integrated with an independent power supply and a liquid crystal screen for measuring operation and result display.
The special direction measurement device for the corner reflector with the direction measurement reference of the second embodiment of the invention has the specific measurement and use method that: butting special pointing measurement equipment with a corner reflector, installing first positioning pins 2-3 and second positioning pins 2-4 of the special pointing measurement equipment for the corner reflector in first positioning holes 1-3 and second positioning holes 1-6 of the corner reflector, and placing positioning surfaces 2-7 right opposite to and on a third measurement reference surface 1-4 of a corner reflector No. 3, so that the installation reference surface of the pointing measurement equipment is matched with the measurement reference surface of the corner reflector to be measured, starting a power supply of the pointing measurement equipment for measurement, and displaying a result; the pointing measurement equipment can also be installed on the corner reflector according to the pointing requirement required to be set by the corner reflector, and the pointing result value is observed while the pointing of the corner reflector is adjusted until the display result reaches the adjustment target, so that the adjustment is completed. The azimuth elevation direction measuring instrument integrates a double-antenna GNSS direction finder and a high-precision inclinometer, has an absolute azimuth direction measuring function taking the true north as 0 bit, and has an absolute elevation direction measuring function taking the horizontal plane as 0 bit. The azimuth angle output by the azimuth pitching directional measuring instrument is an included angle between a connecting line of phase centers of the first GNSS receiving antenna and the second GNSS receiving antenna and the north direction, and the output pitching angle is an included angle between a line which passes through the center of the positioning plane and is perpendicular to a connecting line of the bottoms of the first positioning pin and the second positioning pin and the local horizontal plane.
The special pointing measurement equipment for the corner reflector with the pointing measurement reference, provided by the second embodiment of the invention, has high pointing measurement precision, and the azimuth and pitching absolute pointing measurement precision of the corner reflector can generally reach within 0.1 degree; the pointing measurement equipment has strong field environment adaptability, is convenient and quick to use and operate, can conveniently perform pointing measurement in a field test, saves pointing adjustment time, and facilitates field operation and test preparation of workers; the measurement mode is flexible, the pointing measurement equipment can be installed on the corner reflector for measurement, the result is directly displayed, the pointing measurement equipment can also be installed on the corner reflector according to the pointing requirement required to be set by the corner reflector, the pointing result value is observed while the angle emitter is adjusted until the display result reaches the adjustment target.
Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, the person skilled in the art should have a clear understanding of the corner reflector with directional measurement reference and the dedicated directional measurement device of the present invention.
It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. In addition, the above definitions of the various elements are not limited to the specific structures, shapes or modes mentioned in the embodiments, and those skilled in the art may easily modify or replace them, for example:
(1) other structures can be selected for the corner reflector and the pointing direction measuring equipment;
(2) directional phrases used in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., refer only to the orientation of the attached drawings and are not intended to limit the scope of the present invention;
(3) the embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e. technical features in different embodiments may be freely combined to form further embodiments.
In summary, the corner reflector with the pointing measurement datum and the special pointing measurement equipment have the advantages that the corner reflector is simple in structure and low in cost, and the pointing measurement datum can be formed only by processing three measurement datum surfaces on the bottom surface; the special pointing measurement precision is high, and the azimuth and pitching absolute pointing measurement precision of the corner reflector can generally reach within 0.2 degrees; the pointing measurement equipment has strong field environment adaptability, is convenient and quick to use and operate, can conveniently perform pointing measurement in a field test, saves pointing adjustment time, and facilitates field operation and test preparation of workers; the measurement mode is flexible, the pointing measurement equipment can be installed on the corner reflector for measurement, the result is directly displayed, the pointing measurement equipment can also be installed on the corner reflector according to the pointing requirement required to be set by the corner reflector, the pointing result value is observed while the angle emitter is adjusted until the display result reaches the adjustment target.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A dedicated pointing measurement device with a corner reflector pointing to a measurement reference, comprising: the device comprises a corner reflector with a directional measurement reference, a connecting rod (2-1), a first GNSS signal receiving antenna (2-2), a second GNSS signal receiving antenna (2-5), a first positioning pin (2-3), a second positioning pin (2-4) and an azimuth elevation directional measuring instrument (2-6), wherein the first GNSS signal receiving antenna, the second GNSS signal receiving antenna, the first positioning pin (2-3), the second positioning pin (2-4) and the azimuth elevation directional measuring instrument are positioned on the connecting rod;
the first GNSS signal receiving antenna (2-2) and the second GNSS receiving antenna (2-5) are arranged at two ends of the connecting rod, and the first positioning pin (2-3) and the second positioning pin (2-4) are positioned on a connecting line of phase centers of the first GNSS signal receiving antenna and the second GNSS receiving antenna;
the azimuth pitching orientation measuring instrument (2-6) is provided with a positioning surface (2-7), and the positioning surface (2-7) and the bottoms of the first positioning pin (2-3) and the second positioning pin (2-4) are positioned on the same spatial plane and are used for determining the installation reference surface of the special orientation measuring equipment; the positions and the sizes of the first positioning pin and the second positioning pin are matched with two positioning holes of the corner reflector, the position of a positioning surface corresponds to a third measurement reference surface of the corner reflector, the first positioning pin (2-3) and the second positioning pin (2-4) are arranged in the first positioning hole (1-3) and the second positioning hole (1-6) of the corner reflector, and the positioning surface (2-7) is arranged on the third measurement reference surface (1-4) of the corner reflector, so that the butt joint of the special pointing measurement equipment and the corner reflector is realized;
the corner reflector with pointing measurement reference comprises:
the three measuring datum planes are positioned in the same space plane, the planes of the three measuring datum planes are parallel to the reference plane of the corner reflector or are positioned in the same space plane, the first measuring datum plane (1-2) and the second measuring datum plane (1-5) are respectively positioned at two ends of one side edge of the reference plane and are respectively provided with a first positioning hole (1-3) and a second positioning hole (1-6), the connecting line of the first positioning hole and the second positioning hole is parallel to the side edge, the third measuring datum plane (1-4) is positioned on the reference plane and has a certain distance with the side edge, and the connecting line of the center of the third measuring datum plane and the midpoint of the side edge is vertical to the side edge;
three measuring reference surfaces of the corner reflector are three small high-precision planes; a connecting line of the first positioning hole and the second positioning hole is used as a reference for measuring the azimuth angle; and a straight line which passes through the center of the third measurement reference surface (1-4) and is vertical to the connecting line of the centers of the two positioning holes is used as the reference for measuring the pitch angle.
2. The dedicated pointing measurement device according to claim 1, characterized in that: the azimuth elevation direction measuring instrument integrates a double-antenna GNSS direction finder and a high-precision inclinometer, has an absolute azimuth direction measuring function taking the true north as 0 position, and has an absolute elevation direction measuring function taking the horizontal plane as 0 position;
the azimuth angle output by the azimuth pitching directional measuring instrument is an included angle between a phase center connecting line of the first GNSS signal receiving antenna (2-2) and the second GNSS signal receiving antenna (2-5) and the due north direction; the output pitching angle is the included angle between the vertical line of the connecting line of the positioning surface (2-7) and the bottoms of the first positioning pin (2-3) and the second positioning pin (2-4) and the local horizontal plane.
3. The dedicated pointing measurement device according to claim 1, characterized in that: the azimuth pitching directional measuring instrument is integrated with an independent power supply and is provided with a liquid crystal screen for measuring operation and result display.
4. The dedicated pointing measurement device according to claim 1, characterized in that: the connecting rod (2-1) comprises a connecting piece body and a GNSS signal transmission line, the length of the connecting rod can be adjusted, and the connecting rod is suitable for different requirements of azimuth pointing precision and measurement installation.
5. The dedicated pointing measurement device according to claim 1, characterized in that: the first GNSS signal receiving antenna (2-2) is a main receiving antenna, and the second GNSS signal receiving antenna (2-5) is a slave receiving antenna, and receives navigation positioning signals emitted by a GPS and Beidou navigation satellite system.
6. The dedicated pointing measurement device according to claim 1, characterized in that: the corner reflector is a three-surface corner reflector, and the bottom surface of the corner reflector is in the shape of an isosceles right triangle or a rectangle; or the corner reflector is a dihedral corner reflector, and the bottom surface of the corner reflector is rectangular.
7. The dedicated pointing measurement device according to claim 6, characterized in that: the bottom surface of the corner reflector is an isosceles right triangle, the bottom surface (1-1) is used as a reference surface, the first measuring reference surface (1-2) and the second measuring reference surface (1-5) are positioned at two ends of the inclined edge of the bottom surface, the connecting line of the first positioning hole and the second positioning hole is parallel to the inclined edge, and the center of the third measuring reference surface is positioned on the middle line of the inclined edge.
8. The dedicated pointing measurement device according to claim 6, characterized in that: the bottom surface of the corner reflector is rectangular, the bottom surface (1-1) is used as a reference surface, the first measuring reference surface (1-2) and the second measuring reference surface (1-5) are positioned at two ends of the side edge of the bottom surface, and the side edge is parallel to the intersection line of the bottom surface (1-1) and other surfaces.
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| CN201610815279.8A CN106443603B (en) | 2016-09-09 | 2016-09-09 | Corner reflector with pointing measurement reference and special pointing measurement equipment |
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| CN108712209A (en) * | 2018-03-01 | 2018-10-26 | 中国人民解放军战略支援部队航天工程大学 | Laser communication fast Acquisition alignment methods based on retro-reflective properties |
| CN109752693A (en) * | 2019-01-30 | 2019-05-14 | 云南电网有限责任公司电力科学研究院 | A kind of triangular pyramid type corner reflector for iron tower of power transmission line |
| CN110208734A (en) * | 2019-04-11 | 2019-09-06 | 中国科学院电子学研究所 | Electronics direction finding integrated system and method |
| CN112285661B (en) * | 2020-09-27 | 2024-02-06 | 中国科学院空天信息创新研究院 | Four-side combined corner reflector |
| CN113740806B (en) * | 2021-08-02 | 2024-03-22 | 中国资源卫星应用中心 | Three-sided corner reflector and using method thereof |
| CN113740807B (en) * | 2021-08-02 | 2023-10-27 | 中国资源卫星应用中心 | Dihedral corner reflector and use method thereof |
| CN114236743B (en) * | 2021-12-16 | 2023-09-29 | 北京环境特性研究所 | Calibration system and method for plane reflector array |
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