UAS Sensor Placement

UAS Sensor Placement
Sensor placement is crucial for commercial applications considering the data collected. I want to mention a few interesting installations in DJI’s UAS, first being the Matrice 210 which allows a camera to be placed on the top on the drone for bridge inspections or missions where the vehicle needs to fly under the object being inspected. The second is the Mavic 2 Enterprise which has additional payloads such as a visible strobe, loudspeaker, and spotlight. These sensors and payloads are examples of proper sensor placement in addition to the task they perform.
The UAS I chose for aerial photography is the Phantom 4 RTK by DJI. This UAV will change the way we do aerial imagery through the means of its super precise GPS and 1in. Sensor camera. The drone operates the same way the other DJI drones with a ground controller and iPad or iPhone. Other ground station tablets can be purchased from DJI as well. The Phantom 4 has about 30 minutes of battery life and can operate to the limits as specified legally by the FAA. The payload includes a single camera on the bottom that houses a 1 inch, 20-megapixel CMOS sensor. The camera also has a mechanical shutter allowing the aircraft to move forward and capture high-resolution images without any motion blur. The aircraft can also shoot video at 4k in MOV format, and high-resolution stills at 4864×3648 and 5472×3648, this makes the aircraft perfect for mapping and imaging solutions where accuracy is vital. The RTK module on the top of the aircraft is integrated directly into the Phantom 4 RTK. It provides real-time, centimeter-level positioning data for improved absolute accuracy on image metadata ("Phantom 4 RTK - Next Gen Mapping Solution - DJI", 2018). “Sitting just beneath the RTK receiver is a redundant GNSS module, installed to maintain flight stability in signal-poor regions such as dense cities” ("Phantom 4 RTK - Next Gen Mapping Solution - DJI", 2018). This GPS RTK system has “the ability to connect this positioning system to the D-RTK 2 Mobile Station, NTRIP (Network Transport of RTCM via Internet Protocol) using a 4G dongle or WiFi hotspot, or store the satellite observation data to be used for Post Processed Kinematics (PPK)” ("Phantom 4 RTK - Next Gen Mapping Solution - DJI", 2018).
The second UAS that I have chosen is the Diatone GT200 2018. This drone consists of just a few parts and is very easy to assemble or can be purchased as one whole unit. A carbon fiber frame makes of the base with 4 high power motors mounted on each corner. It has a thrust to weight ratio of 12. The antenna is mounted on the back for a continuous signal, and the camera is an HS1177 SUPER HADⅡ CCD Sensor that can shoot 768×494 in NTSC format. The camera is angled up at a certain degree to facilitate the pitched movement of the drone. This assists the operator in being able to see what is in front as the drone pitches to move forward. The location and placement of this sensor (camera) are optimal for the best operation of this unit.


Diatone GT200 2018 Build (99mph) - COMPLETE Parts List. (2017, October 13). Retrieved from https://fpvdronereviews.com/reviews/diatone-gt200-2017-build-98mph-complete-parts-list/ FPV Drone Reviews

 Phantom 4 RTK - Next Gen Mapping Solution - DJI. (2018). Retrieved November 2, 2018, from https://www.dji.com/phantom-4-rtk?site=brandsite&from=nav


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