Off-Line Sensing: Memorizing Interactions in Passive 3D-Printed Objects
summary
Fabricates passive 3D-printed sensors that memorize one-time events by routing a conductive liquid between chambers, readable via capacitive touchscreen readout. Prints on a two-nozzle consumer printer, pausing to inject fluid or filling by needle, with a Java/OpenSCAD design tool. Tests sweep 15 acceleration levels and multiple wall heights, reliably distinguishing typical truck bumps from emergency shocks; a freeze-trigger uses a liquid that breaks a 0.5 mm wall reliably. Sensors require no power and persist state until read.
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chapters (7)
- 0:00Introduction and background
- 2:41Offline sensing concept
- 8:04How 3D-printed sensors work
- 10:12Tilt and pressure sensors
- 12:45Design and printing process
- 14:34Evaluation and results
- 17:23Conclusion and Q&A
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