DopplerCan: Difference between revisions

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[[Image:Doppler-hand.jpg]]
[[Image:Doppler-hand.jpg]]
The aluminum cans are about 2.5" in diameter and 3" long.
The below graph shows example data of a single person running around the outside of the tower, about 1-2 meters from the base circumference.  If you zoom in on the pic, it will show voltages and timing.  With 8 sensors on the exterior of the tower, pointing down and out, then electronics would see a propagated wave as shown here, from sensor to sensor.
The below graph shows example data of a single person running around the outside of the tower, about 1-2 meters from the base circumference.  If you zoom in on the pic, it will show voltages and timing.  With 8 sensors on the exterior of the tower, pointing down and out, then electronics would see a propagated wave as shown here, from sensor to sensor.



Revision as of 20:26, 14 July 2013

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Doppler-hand.jpg

The aluminum cans are about 2.5" in diameter and 3" long.

The below graph shows example data of a single person running around the outside of the tower, about 1-2 meters from the base circumference. If you zoom in on the pic, it will show voltages and timing. With 8 sensors on the exterior of the tower, pointing down and out, then electronics would see a propagated wave as shown here, from sensor to sensor.

Note that the sensors can easily distinguish walking from running, in the case of a single person moving around the tower. Doppler-walking-1.jpg Doppler-walking-4.jpg


Here is data on essential attack/decay time of the sensors. Attack time to identify motion is about 1 second, decay time back to baseline (no motion detected) is about 2 seconds. Doppler-walking-3.jpg


The below graph shows example data of a single person stepping towards, then away, from a tower strut repeated 6 times. The person would be about 3 meters from the base of the tower, about 6 meters away from the sensor, assuming sensor is about 4 meters off of ground. Doppler-walking-2.jpg


Case 1) When just one (or very few people) are performing some symmetrical synchronized activity inside or around the tower, I think the radar dopplers' will provide a very high degree of specification. They will act to give highly recognizable data to the host processor. This data could just be directly reflected to the light or laser controls to effect a near perfect mimicking of that activity in photonic form. This might be cool because no decision making (about the activity) will be required by processor. The processor just has to map the waveforms directly to light control. In this mode, tower LEDs would be seen to move in direct synchrony to runner (or runners) on the ground.

Case 2) Here I'm imagining a large group of people milling about the tower. It seems this might be the typical case. If the entire group froze, within a distance of 5 meters from the tower (and no big art cars moving within 30 meters!) then the tower dopplers could easily identify this state. As the crowd made increasingly frenetic activity starting from a distance of 5 meters away and then moving towards tower, then overall Doppler signal would rise. If the entire crowd starting jumping up and down, within 1-2 meters of tower, then Doppler signal would maximize. This maximal state could then set off some fantastic effect.