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I cite a product below which is emploied as terrain following and height fixing for drones. 

Most famous and widely used LiDAR for Terrain Following

[FW below]

DE LiDAR TF01, a product widely known in the drone and smart devices industries, was an immediate success upon its appearance at the show. Its application in altitude measurement, drone terrain following, distance measurement and security sensors were particularly attractive to visitors from all over the world.


Image 1: DE LiDAR TF01’s Altitude Measurement Module

The module, already in mass production, can work with flight controllers like Pixhawk and TopXGun andaddresses the difficulty of altitude measurement that many drone and flight controller producers experienced. Unlike traditional altitude measurement solutions such as GPS, barometers and ultrasound, the module can detect and refresh the distance between a flying drone and crops on the ground in real time at a frequency of 500 times per second. It also ensures that the drone can fly at a stable height with an error in centimeters. The module, which is free from the interference of temperature, ambient light change and airflow, can also significantly improve the work performance of drones.

During the show, TF01 was synchronously launched for sale on global hardware platforms likeSeeed (https://www.seeedstudio.com/) and RobotShop (https://www.robotshop.com/) and dozens ofdistributors kick off business talks with Benewake.

Benewake began to deploy a patenting strategy overseas for its LiDAR product as early as 2014. By far, it has built an independent intellectual property system (through overseas patents) and passed a complete range of European and American product certification (FCC, CE, etc.), which ensures the legitimate use and sale of the product internationally.

Website: www.benewake.com