mjs513
Senior Member+
Well. Works like a charm with the T3.5. Made an aluminum horn using your first pattern and a bunch of the hvac tape. Still getting some readings from the back = have to work on that. It starts to pick up motion at about the edge of the horn about 6 inches away. Saw a couple of horns with what looks like a scallop divider on top and bottom, down the center. Guess same idea as yours. May try that as well as extending the horn straight out. I am attaching a snapshot of the data from plotter - think it looks ok. Works a lot better than what I did a few years ago. Again great job.
Mike
UPDATE: I ran two additional tests tonight to check out the actual raw data I am getting with the existing setup. Actually pretty happy with the results but still sorting through the differences between the HB100 backpack that I got from tindie vs your design. Anyway, in this first test I am first moving my hand back and forth across the horn and then towards and away and back again. I wind up with two peaks as expected the first at around 0.45 seconds and the second at 0.7 seconds (mid points). Guess the speed of my hand movements would be between 3.4-3.8 mph across and around 3 mph back and forth?
The second test is me getting up from my desk and walking to the front of the house and the walking back and sitting down. Both directions the speed seems to be around 3 mph or so, I think.
Is this analysis about right?
Mike
UPDATE: I ran two additional tests tonight to check out the actual raw data I am getting with the existing setup. Actually pretty happy with the results but still sorting through the differences between the HB100 backpack that I got from tindie vs your design. Anyway, in this first test I am first moving my hand back and forth across the horn and then towards and away and back again. I wind up with two peaks as expected the first at around 0.45 seconds and the second at 0.7 seconds (mid points). Guess the speed of my hand movements would be between 3.4-3.8 mph across and around 3 mph back and forth?
The second test is me getting up from my desk and walking to the front of the house and the walking back and sitting down. Both directions the speed seems to be around 3 mph or so, I think.
Is this analysis about right?
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