Railgun App
Rayman
Posts: 14,162
Just Sharing:
I just finished the code for an app that calculates the velocity of a railgun projectile (while it's still in the barrel), calculates the appropriate delay, and then sends a trigger pulse to a flash x-ray unit so we can take a picture of the projectile as it goes flying by at ~2 km/s or so.
There are two bdot sensors at the end of barrel that give a pulse as the projectile goes by.· I'm using the time delay between these pulses along with the physical distance between the probes·to calculate the velocity.
The Propeller seems to have just enough speed to pull this off (although I had to do the multiplications and other math in assembly...)
Now, I just have to package it up and maybe try it out next week...
I just finished the code for an app that calculates the velocity of a railgun projectile (while it's still in the barrel), calculates the appropriate delay, and then sends a trigger pulse to a flash x-ray unit so we can take a picture of the projectile as it goes flying by at ~2 km/s or so.
There are two bdot sensors at the end of barrel that give a pulse as the projectile goes by.· I'm using the time delay between these pulses along with the physical distance between the probes·to calculate the velocity.
The Propeller seems to have just enough speed to pull this off (although I had to do the multiplications and other math in assembly...)
Now, I just have to package it up and maybe try it out next week...
Comments
I'm looking at using an x-pinch to produce a flash of x-ray to see the workings of a fly/bee in flight but I wondered if there were simpler alternatives.
I take it this is for your job rather than fun?
Graham
Jonathan
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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot
http://www.nrl.navy.mil/Review06/images/06Materials(Meger).pdf
Here's one of our flash-xray units:
http://www.titan-psd.com/PDFs/1mv.pdf