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Insect dimension measurement method based on multi-frequency scattering modeling

A measurement method and technology for insects, which are applied in the field of insect size measurement based on multi-frequency scattering modeling, can solve problems such as single amount of information, limit the effectiveness of insect radar, and cannot accurately obtain insect biological parameters, so as to enhance the ability to identify Effect

Active Publication Date: 2016-07-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] Traditional insect radar is limited by factors such as working system, system functions, algorithms and indicators, and cannot accurately obtain insect biological parameters
Traditional insect radar usually works in the Rayleigh zone and only has a single frequency band. Therefore, the insect radar scattering cross-sectional area measured by the radar can only be compared with the empirical value of the Rayleigh zone, so as to calculate the mass of the insect, and further base on the mass reflection. type or classify
The amount of information obtained by this method is relatively simple, especially for larger insects, whose scattering will enter the resonance region, which will greatly affect the accuracy of traditional body shape inversion methods
Therefore, the insect size measurement method of traditional insect radar often cannot cover a wide range of insect sizes, which limits the effectiveness of insect radar.

Method used

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  • Insect dimension measurement method based on multi-frequency scattering modeling
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  • Insect dimension measurement method based on multi-frequency scattering modeling

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Embodiment

[0072] In order to verify the aforementioned size measurement method, four typical migratory insects (meadow borer, cotton bollworm, armyworm, and rice locust) were modeled using a rotationally symmetric medium ellipsoid, and their dimensions were set to be 12mm×2mm, 20mm× 4mm, 24mm×4mm and 30mm×6mm (long axis x short axis). The wideband RCS of four dielectric ellipsoids with different sizes is simulated by CST. And give the corresponding piecewise function fitting results, such as image 3 shown. It can be seen that the piecewise function of the given form can satisfy the fitting of the wide-band RCS simulation data of insects of different sizes.

[0073] Based on the point frequency RCS simulation data of the three bands of X, Ku and Ka, a kind of insect size measurement method based on multi-frequency scattering modeling according to the present invention is adopted to complete the insect size measurement simulation under this parameter, and the specific process is as fol...

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Abstract

The invention discloses an insect dimension measurement method based on multi-frequency scattering modeling. The method may simultaneously measure the length and the width of an insect and accordingly may further derive a ratio of the mass to the length and width of the insect in an inversion way. Compared with a conventional insect radar dimension measurement method, the insect dimension measurement method based on multi-frequency scattering modeling greatly expands the dimension range of covered insects so as to enhance a capability of identifying an insect category for an insect radar.

Description

technical field [0001] The invention belongs to the technical field of insect radar, in particular to an insect size measurement method based on multi-frequency scattering modeling. Background technique [0002] Radar came into being during World War II and is an electronic device that uses electromagnetic waves to detect and measure targets. Military and weather radars have long discovered that there are many echo points in the sky that are neither military targets nor atmospheric elements, and these echoes were later confirmed to be migratory insects. Because the water content in the insect body is above 80%, it is a good electromagnetic wave reflector, which is also an important prerequisite for the successful development and application of insect radar. Since then, entomologists around the world have conducted a series of studies on migratory insects using insect radar. At present, the United States, Australia and the United Kingdom all have their own insect radar syst...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 曾涛龙腾刘长江王锐胡程
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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