Long-distance track simulation method facing insect migration, take-off and cruising
A trajectory simulation, insect technology, applied in the field of trajectory simulation, can solve complex and inaccurate problems
Active Publication Date: 2019-01-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
In response to the above problems, in the fourth stage: the trajectory simulation began to add the flight characteristics of insects themselves, but the speed and head orientation of the insects added in the current research are set to fixed values, and the head orientation is often set to true south or true north direction, and the reality is more complicated than that
At the same time, in the current trajectory simulation research, the radar observation location is usually used as the starting point of the trajectory simulation, which is not accurate enough
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[0030] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0031] The present invention simulates the trajectory of insects flying more than 10 kilometers. It is divided into three steps. First, WRF is used to calculate the high-precision background atmospheric field, and then the possible insect take-off area is determined by using the obtained high-precision background atmospheric field. Finally, based on radar The speed and direction of the observed insect migration trajectory and the directional flight strategy of the insect are calculated to calculate the flying speed and head orientation (direction) of the insect itself, and take the determined take-off area as the starting point of the trajectory simulation, and use the Lagrangian particle diffusion model to simulate the insect Long-range migration trajectories in the background atmosphere.
[0032] Step 1: Use WRF to calculate the background atmospheric fi...
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The invention discloses a long-distance track simulation method facing insect migration, take-off and cruising. The method is characterized by determining the take-off area of insects based on the condition that a background atmospheric field is set to be reasonable; then, based on the verified directional flight strategy existing in the insects and the migration track speed and the direction of the insects observed by a radar, determining the speed and the head orientation of the insects during a migration process; and using a Lagrange particle diffusion model to simulate the migration trackof the insects in the background atmospheric field. An effective method for accurately simulating the track of insect migration and predicting an immigration area is provided. Compared with an existing insect migration track simulation method, by using the method of the invention, based on the background atmospheric field, the take-off area of the insect migration is determined, and an accurate insect flight characteristic is added to cruising track simulation so as to accurately simulate the track of the insect migration and predict the possible immigration area. Simultaneously, the inventionprovides an effective means for researching an insect migration behavior.
Description
technical field [0001] The invention belongs to the field of trajectory simulation, and in particular relates to a method for long-distance trajectory simulation oriented to insect migratory take-off and cruising. Background technique [0002] Insect migration is a common phenomenon in nature. Sudden large-scale migration of pests will have a huge impact on agricultural production. Monitoring and early warning of insect migration can effectively avoid the impact of insect migration. Insect radar is a powerful tool for monitoring insect migration, but its monitoring range is far smaller than the actual migration distance of insects. Therefore, it is necessary to use trajectory simulation technology to predict long-distance insect migration trajectories. [0003] Trajectory simulation was originally used in meteorology to calculate the path of pollutants and other particles in the atmosphere. This method is introduced into the study of insect migration trajectories. Insects a...
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IPC IPC(8): G01S13/88
CPCG01S13/88Y02A90/10
Inventor 王锐王逸璇张天然崔铠
Owner BEIJING INSTITUTE OF TECHNOLOGYGY