Sz Dji Technology Co., Ltd.

Other

Liming Huang

Wancheng Zhou

Yun Yu

Ke Sun

A convenient lid includes a housing, a lid opening, a press plate, a button, an insertion plate, a guide plate and a threaded body, the lid opening and the threaded body are provided on the lower part of the housing, the side of the lid is provided with a first concave cavity, a fixing body and a guide column are provided in the first concave cavity, a switch device and a security device are provided on the fixing body and the guide column, a guide plate, an insertion plate and a press plate are provided inside the lid, a concave ring and a guide strip are provided on the outside of the lid opening, a convex ring, a guide slot and a latch are provided on the inner side of the threaded body, ribs and threads are provided on the outer side of the threaded body.

Convenient lid

A method and a device for measuring flight parameters of an unmanned aerial vehicle (UAV) are provided, the method includes, capturing images and collecting an angular velocity of the UAC, extracting corner points from a current frame image, estimating an estimated area according to the angular velocity of the UAV, searching for a corresponding corner point in the estimated area, obtaining a speed of each of the corner points, obtaining a pixel velocity, and obtaining an actual speed of the UAV based on the pixel velocity and a flight altitude of the UAV.

Method and device for measuring flight parameters of an unmanned aerial vehicle

An ultrasonic sensing system includes an ultrasonic receiver configured to receive an ultrasonic signal and a gain-adjustable amplifier operably coupled to the ultrasonic receiver. The gain-adjustable amplifier is configured to amplify the ultrasonic signal according to a variable gain determined based at least in part on a value of a timer that corresponds to a measuring distance.

Proximity sensing systems and methods

Methods, systems and device are provided for improving the range and accuracy of proximity measurement such as in ultrasonic sensing systems. In particular, the blind zone caused by reverberation signals can be reduced or eliminated by attenuating signals received during the time period corresponding to the blind zone without. In an implementation, an attenuator circuit is selected by a switch to process received signals during the blind zone time period and deselected by the switch after the time zone time period. Additionally, the accuracy and range of the measurement can be improved by varying the gain provided to the received signals based on the varying measuring distance. In an implementation, a gain-adjustable amplifier is controlled by a gain control signal to provide incremental gain as time increases.

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Shenzhen, China

Liming Huang