Zhejiang University

Hangzhou Peilan Aviation Technology Co., Ltd.

Liwen He

Yong He

Pengcheng Nie

Bingquan Chu

Wenna Zhang

Jiangpeng Zhu

Disclosed is a flexible filter spectral camera. A flexible filter module includes N flexible filter units corresponding to N different wavebands, respectively, where N is a positive integer greater than or equal to 2. A CMOS (Complementary Metal Oxide Semiconductor) module is used to convert incident light into a digital signal. Any one of the N flexible filter units can be switched to a preset position to filter light emitted from a lens and transmit light at a corresponding waveband to the CMOS module. The preset position is between the lens and the CMOS module. An image processor is connected to the CMOS module and is used to convert the digital signal into an image. In accordance with the present disclosure, precision imaging of the lens is achieved, the overlapping accuracy and imaging quality of the images are improved, and meanwhile, the processing efficiency for overlapped images is improved.

Flexible filter spectral camera

A method and system for determining flight height of an unmanned aerial vehicle (UAV) includes a determining device that includes a camera at bottom of the UAV carried on a three-axis self-stabilizing tripod head; and a carrier phase difference satellite positioning system (CPDSPS), a graphics processing computer (GPC) and a power supply system provided on top of the UAV The GPC is connected with the CPDSPS, the power supply system and the camera, respectively. An attitude and heading reference system (AHRS) is provided at the bottom of the three-axis self-stabilizing tripod head and connected with the GPC The GPC is configured to determine relative height of the UAV from a canopy of farmland surface crops according to position information acquired by the CPDSPS, attitude information acquired by the AHRS and ground orthographic image acquired by the camera, and determine flight height of the UAV according to the relative height.

Device, method and system for determining flight height of unmanned aerial vehicle

The present invention relates to a device and method for measuring the amount of a liquid chemical in a plant protection unmanned aerial vehicle (UAV). An ultrasonic sensor is adopted to measure a distance between a liquid chemical level in a liquid chemical measuring tube communicated with a liquid chemical tank and a top end of the liquid chemical measuring tube, and then a height of the liquid chemical in the liquid chemical tank is further determined according to an acquired attitude angle of the UAV and a distance between a central position of the liquid chemical measuring tube and a central position of the liquid chemical tank, thereby accurately measuring the amount of the liquid chemical in the liquid chemical tank of the UAV.

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Hangzhou, China

Liwen He