An Inversion Method of Insect Characteristic Parameters Based on Eigenvalues ​​of Polarization Power Matrix

A feature parameter and power matrix technology, applied in the field of insect radar, can solve the problem of lack of effective methods for body length parameter estimation, and achieve the effect of improving species identification ability and measurement ability.

Active Publication Date: 2020-06-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

In conclusion, the current method based on rotational polarization measurement has an estimation error of up to 40% for body weight parameters, and it is urgent to further improve the estimation performance, and there is no effective method for estimating body length parameters

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  • An Inversion Method of Insect Characteristic Parameters Based on Eigenvalues ​​of Polarization Power Matrix
  • An Inversion Method of Insect Characteristic Parameters Based on Eigenvalues ​​of Polarization Power Matrix
  • An Inversion Method of Insect Characteristic Parameters Based on Eigenvalues ​​of Polarization Power Matrix

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] The PSM of the target is defined by a pair of orthogonal polarization bases, such as horizontal polarization and vertical polarization. Under different polarization bases, the PSM has different forms. Under the definition of the same polarization base, when the surface of the target illuminated by the radar is the same, but the target orientation is different (that is, the angle between the polarization base and the target body axis changes), the PSM is also different. This brings certain difficulties to the extraction of physical properties of objects based on PSM. In the study of scattering matrix, people hope to find some quantities, which have nothing to do with the selection of radar polarization base and the direction of the target. Under the given observation conditions, these quantities directly reflect some physical characteristics, so they...

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Abstract

The invention discloses an insect characteristic parameter inversion method based on the characteristic values of a polarization power matrix. The research on the polarization invariants of a polarization scattering matrix shows that the two characteristic values lambda 1 and lambda 2 (lambda 1 >= lambda 2) of a Graves power matrix have a strong correlation with the body length and body weight oflarge insects and small insects. On the basis, a method for inverting the body length and body weight of insects using lambda 1 of large insects and lambda 2 of small insects is presented, and a method for distinguishing between large insects and small insects is given. The measurement of body length parameters of insects is realized for the first time. The error of body weight inverted using themethod of the invention is lower than the error of body weight inverted using the traditional method. The ability of VLR (Vertical Looking Radar) to measure the biological parameters of insects is significantly enhanced. The ability to identify the species of migratory insects will be greatly improved. The method is of great significance to the research on the air ecological system and the management of insect pests.

Description

technical field [0001] The invention belongs to the technical field of insect radar, and in particular relates to an insect characteristic parameter inversion method based on the characteristic value of a polarization power matrix. Background technique [0002] Radar is one of the most effective means of monitoring insect migration in the air. In the 1960s, the appearance of scanning insect radar discovered the phenomenon of insects gathering into layers, which greatly promoted the study of migratory entomology; in the 1970s In the 1990s, Vertical Looking Radar (VLR) appeared and developed rapidly, which made the continuous long-term detection of insects possible, and could extract parameters such as body axis orientation and weight of individual insects, which greatly promoted the development of radar entomology. [0003] Monitoring and identifying migratory insects is of great significance for studying aerial ecosystems and controlling pests. If parameters such as insect ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S13/88
Inventor 胡程李卫东王锐龙腾曾涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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