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HAVOK Series Mapping Package

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The popularity of Aerial Mapping has increased over the last couple of years with access to low cost reliable flight controller hardware and software. While there are a number of off-the-shelf solutions available, their high costs and rigid processors present a barrier to those who wish to experiment with the technology. Australian Droid and Robot present the GX-30 Havok as an open source, experimental drone which makes aerial mapping accessible to everyone.

The ADR Havok has been developed as an all-purpose, highly configurable platform for aerial operations. Given its large, stable footprint, the Havok is particularly suited to aerial imagery and mapping. As a T-Motor partner, all versions of the Havok are supplied with T-Motor motors and ESCs. The Havoc incorporates the open source Arducopter software and Pixhawk flight control system. The system is delivered in three main options;

Folding – This variant has folding arms and retractable landing gear. It is best suited to video applications where a larger gimbal is required.

FlatPack – The flatpack version is made up of carbon plates where the arms are clamped to the main frame. This model is designed for the damped front gimbal and is suited to aerial mapping.

Composite – This variant has the arms permanently joined to the main frame. This is the lightest possible configuration and is designed for endurance mapping.

All of the Havok variants are cut from high strength carbon fibre plate and tube. In all models, the electronics package and battery are vibration isolated from the propulsion frame. By using the inertia of the battery to reduce the excitation of the sensor frame, a high degree of dampening can be achieved resulting in crystal clear images.

The Havok has a nominal flight time of 30 minutes (longer or shorter depending on battery) and is available with a full stabilsed gimbal and camera trigger for cannon cameras running CHDK software, however any camera can be used with the appropriate trigger cable. The large, slow rotating motors and propellors reduce vibration and provide energy efficient flight. The plywood main plates and rubber mounts further absorb vibration resulting in crisp, clear shots.

The heart of the Havok is the Open Source “Pixhawk” flight controller. The flight controllers run the “APM Copter” open source flight control software. The community surrounding this software (www.diydrones.com) is extensive which means that every release is tested comprehensively in the field with bug reports being sent back to the developers.

The process of Aerial Imaging is shown schematically in the gallery. Basically, you need a good drone with a stabilized gimbal holding a camera. Once you have the drone, a photo mission is designed on the ground station software based on the height you will be flying, the field of view of the camera lens and the amount of front and side overlap that is required for the image processing software. The screen shot from Mission Planner is shown in the gallery.

You then fly the mission, download the photos and start processing.