Zhejiang University

Zhejiang Lab

Yue Feng

Jian Wang

Sheng Liu

Xiangning He

Xiaogang Xu

Yaolong Yang

Xinghua Wei

Fen Xu

Yinxing Ma

Jiande Wu

Mengchen Zhang

Provided in the present invention is a method for intelligent identification of rice growth potential based on unmanned aerial vehicle (UAV) monitoring, the method including the following steps: obtaining rice plot images, labeling the images, establishing a deep convolutional neural network detection model, using the labeled rice plot images to optimize and train the model, inputting the rice plot images to be measured into the trained model, and detecting a location of a rice plot target frame in each image; selecting a target frame with the largest area in each rice plot image, and pre-processing a rice plot image in the target frame; and calculating a vegetation coverage rate of the pre-processed rice plot image, and determining a level of rice growth potential according to the vegetation coverage rate. Also provided in the present invention is a system for intelligent identification of rice growth potential based on unmanned aerial vehicle (UAV) monitoring. The method of the present invention has the advantages of simplicity, high precision, fast speed and low cost in the identification of the rice growth potential, and can be widely used in automatic and intelligent production management of agriculture.

Method and system for intelligent identification of rice growth potential based on UAV monitoring

Disclosed in the present invention are a wireless power and data synchronous transfer system and a data modulation method, wherein a power/information complex modulation is carried out on a primary side front converter and a secondary side back converter, and output power/information flow can be transmitted across the wireless power transfer circuit, thus realizing communication between the primary side and the secondary side. With the method of the present invention, by modulating a digital frequency band signal to a direct current bus, frequency mixing effect of an inverter/rectifier circuit is utilized to move a spectrum of modulated digital signal to a frequency near a power transfer frequency and then the modulated digital signal is transmitted to a circuit on the other side, and the circuit on the other side demodulates the signal to obtain a baseband signal. The present invention has wide applicability and can be used in various wireless power transfer systems, especially for high-frequency systems.

Wireless power and data synchronous transfer system and data modulation method

Growing community of inventors

Hangzhou, China

Yue Feng