Gimbal stabilisation of hyperspectral sensor

We developed a gimbal stabilisation system for the Headwall Photonics micro-Hyperspec. This brushless gimbal actively stabilises the pushbroom scanner to achieve smoother image acquisition. We also re-designed the CameraLink data recording system, and integrated the micro-Hyperspec with a dual frequency GPS unit, MEMS-based IMU, and machine vision camera (all sensors synchronised). The video below demonstrates the stabilisation of the gimbal. The wires need to be loose to reduce the resistance on the gimbal.

The original HyperUAS system is described in our publication here: Lucieer, A., Malenovsky, Z., Veness, T., Wallace, L. (2014). HyperUAS – Imaging spectroscopy from a multi-rotor unmanned aircraft system. Journal of Field Robotics, 31(4): 571-590. doi:10.1002/rob.21508 | Download PDF

The system shown in the video aims to overcome some of the limitations of the HyperUAS setup.

Mega Quad X8 Devourer test flight

UnifarmDevourer-small-01182Late last year, we tested the Devourer D130, an X8 mega-quad with 28″ props. Very successful test with a 3 kg dummy payload, getting good flight times of 20+ minutes. This platform will be used for our heavier sensors, such as the micro-Hyperspec and LiDAR.

 

 

 

 

Dr Josh Kelcey PhD graduation

Dr Josh Kelcey who did his PhD in the TerraLuma research group (2010 – 2014) graduated on 18 December 2014. Congratulations to Josh on completing a fantastic PhD thesis! The title of his PhD thesis is: “Object-based image analysis of ultra- ne spatial resolution imagery acquired over a saltmarsh environment by an Unmanned Aircraft System (UAS)”. One of the journal papers that came out of his thesis looked at the radiometric correction of the Tetracam mini-MCA, and can be found here:  Kelcey, J., & Lucieer, A. (2012). Sensor Correction of a 6-Band Multispectral Imaging Sensor for UAV Remote Sensing. Remote Sensing (UAV special issue), 4(5), 1462-1493. doi:10.3390/rs4051462 | Download PDF

19-02-2015 9-44-32 AM
19-02-2015 9-45-25 AM

Video of X8 flying-wing UAV with multi-sensor payload

In August, we performed a test with an X8 flying wing and Pixhawk autopilot. We wanted to test a new bungee launch system and ran three machine vision cameras capturing multispectral information (each camera captured a different spectral wavelength). Some of the video footage was shot from a DJI Phantom2 Vision+ flown by Dr Guy Willians. The X8 was flown by Darren Turner.