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A method and device for constructing a navigation triangle library for star map recognition

A technology for navigation triangle and star map recognition, which is applied in the field of star sensors and can solve problems such as no solution, inability to meet storage space requirements, and inability to meet measurement requirements in overall performance.

Active Publication Date: 2022-07-01
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

But for the 5.4° field of view and 7th-magnitude star conditions, use this method to set the parameter n s =10 There are about 1209K triangles generated, which cannot meet the storage space requirements of practical applications
If the parameter n of the brightest star point in each star map is adjusted s = 5, the number of triangles drops to 224K, but its recognition rate under various noise interference also drops, and the overall performance cannot meet the measurement requirements
[0005] For the above problems, no effective solution has been proposed

Method used

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  • A method and device for constructing a navigation triangle library for star map recognition
  • A method and device for constructing a navigation triangle library for star map recognition
  • A method and device for constructing a navigation triangle library for star map recognition

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Embodiment 1

[0038] Figure 13 It is a flowchart of a method for constructing a star map recognition navigation triangle library according to an embodiment of the present invention, such as Figure 13 As shown, the method includes the following steps:

[0039] Step S1302, acquiring the size, shape and quantity of triangles in the field of view in different directions.

[0040] Step S1304, build a triangle density distribution model according to the size, shape and quantity of the triangles.

[0041] Step S1306: Generate a triangle utilization model according to the triangle density distribution model and the star magnitudes corresponding to the triangle.

[0042] Step S1308: Eliminate low-utilization triangles in the triangle utilization model to obtain a triangle library.

[0043] Optionally, the building a triangle density distribution model according to the size, shape and quantity of the triangles includes: obtaining the effective area D of the star point. i , which is defined as f...

Embodiment 2

[0119] A device for constructing a star map identification navigation triangle library according to an embodiment of the present invention includes:

[0120] The acquiring module 1400 is configured to acquire the size, shape and quantity of triangles in different directional fields of view.

[0121] The density module 1402 is configured to construct a triangle density distribution model according to the size, shape and quantity of the triangles.

[0122]The utilization rate module 1406 is configured to generate a triangular utilization rate model according to the triangular density distribution model and the star magnitude corresponding to the triangle.

[0123] The culling module 1408 is used for culling low-utilization triangles in the triangle utilization model to obtain a triangle library.

[0124] Optionally, the density module includes: an acquisition unit for acquiring the effective area D of the star point i , which is defined as follows: where i is an asterisk, s ...

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Abstract

The invention discloses a method and a device for constructing a navigation triangle library for star map identification. The method includes: acquiring the size, shape and quantity of triangles in different directional fields of view; constructing a triangle density distribution model according to the size, shape and quantity of the triangles; rate model; culling low-utilization triangles in the triangle utilization model to obtain a triangle library. The invention screens the triangles in the celestial sphere, improves the use efficiency of the storage space, has high matching degree, enhances the recognition rate, and improves the search efficiency.

Description

technical field [0001] The invention relates to the technical field of star sensors, in particular, to a method and device for constructing a navigation triangle library for star map identification. Background technique [0002] With the continuous development of intelligent technology, more and more intelligent equipment is used in people's life, work and study. The use of intelligent technology has improved the quality of people's life and increased the efficiency of people's study and work. [0003] The star sensor is a high-precision attitude measurement instrument. The instrument measures and calculates attitude by observing stars with a camera. Due to its advantages of high measurement accuracy and no accumulation of measurement errors over time, it has been widely used in aerospace fields such as satellites, aircraft, and missiles. In order to achieve high-precision attitude measurement of star sensors, not only high-performance lenses and image sensors are required...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02G01C21/20
CPCG01C21/025G01C21/20
Inventor 江洁马岩张广军
Owner BEIHANG UNIV
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