Hans Vos

After technical education joined the RNLAF and worked as a helicopter-technician, later as a loadmaster on Cougar and Chinook. 

At this moment in the Flight Safety community doing flight and ground safety.

Started skydiving at the age of 16 (some 38 years ago). 

My first Military World Championship in 1988, Campinas Brazil. 4000+ jumps and a lot of competitions up till now.

Thanks to the internet, tutorials and webshops my knowledge for building the AMpaD remains growing. 

LIDAR, Laser Imaging Detection And Ranging is getting affordable thanks to all the robotics and autonomous cars. Mostly these lasers scan 360 degrees, thats quite some time “not looking” at the target. A moving target/tuffet is, not knowing where the center went to, also a challenge. 

My personal goal is to improve the scoring systems, making our sport more attractive for competitors, coaches and audience.

Competitions in Accuracy Landing started with a disc with a diameter of 10 cm attached to a thin line and placed in the center of a large pea gravel-pit.

Nowadays we land on a Automatic Measuring Device (AMD) placed on an artificial pit, mostly a foam or air tuffet. The Dead Center Disc became smaller, 2 cm diameter, but over the last years there was not much improvement in technology.

When pressed these layers act as a switch, first contact is processed. The score is then presented on a display.  All following contacts will be ignored until reset takes place.

Most used AMD’s today are based on the same principle. 

The bottom of the target pad holds flat conductive rings with small spacing. A meshed plastic/fabric provides spacing with the conductive top layer. 

Looking for a system with more accuracy and feedback about the touch point. Started with a, tennis like Hawk-Eye system. A stereo-camera following the lowest point of a landing competitor and doing depth analysis. Big difference, in tennis the ball always has the same shape and color and lines are fixed. Beside expensive equipment, high-speed camera’s and “heavy” computers, there’s also a lot of programming knowledge necessary.

Measuring inside the pad, but on a different way. Touchscreen technology gave the ability of making the touch-zone completely without wires or connections. Combined with a high resolution controller gives a very accurate result. Finding and purchasing the right sensor material was the biggest challenge. 

During first test, results looked, from time to time, incorrect. Linear consistence of the material remained a challenge. 

The current version uses similar tech-nology where a contact through a resistive fabric is compared using analog readings. These readings are accurate and fast, at contact the mathematical calculations for distance and direction is done in 0,0001 second. 


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