Difference between revisions of "WearableUltrasound"
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* https://www.youtube.com/watch?v=arNAMxCgVKs - hour long lecture on piezoelectric cells | * https://www.youtube.com/watch?v=arNAMxCgVKs - hour long lecture on piezoelectric cells | ||
* https://www.youtube.com/watch?v=rpmtztt5W08 - making of a piezoelectric cell from barium titanate. | * https://www.youtube.com/watch?v=rpmtztt5W08 - making of a piezoelectric cell from barium titanate. | ||
* cellphone (windows mobile) used with a usb ultrasound probe http://www.youtube.com/watch?v=kjm9nQ5_bUk | |||
= Weekathon notes = | = Weekathon notes = |
Revision as of 19:45, 20 February 2014
Our final presentation in the hackathon: here
LaunchPadSignalGenerator - using the TI Tiva evaluation board (Cortex M4) to generate a signal, how to setup the gcc stack. (didn't try code studio).
Ultrasound sensor physics and construction
Videos
- https://www.youtube.com/watch?v=arNAMxCgVKs - hour long lecture on piezoelectric cells
- https://www.youtube.com/watch?v=rpmtztt5W08 - making of a piezoelectric cell from barium titanate.
- cellphone (windows mobile) used with a usb ultrasound probe http://www.youtube.com/watch?v=kjm9nQ5_bUk
Weekathon notes
Notes from the IATI MNC weekathon wearable bladder monitoring device weekathon
- Project outline:
- Ultrasound sensor
- how to build?
- where to buy a crystal? what size? how does it relate to the driving frequency? receive/
- Ultrasound sensor
- Use 6 MHz
- Get raspberry pi working
- Get gpio 6 MHz on the pi
- Opamp @Tami to get to 5V at least from pi using a breadboard / weld stuff
- 3M from Nachum.
- TODO 5 V at entrance with op amp
- TODO 6 MHz, not 3 MHz
- TODO take with me from the hacker space per what Aba said:
- soldering station (take mine)
- make some easy hook wires
- tomorrow: check that the p6d works
- TODO can I make an ADC from one of the chips we have?
- DONE can I make a pulse generator from the EK-TM4C123GXL? yes.
- DONE can I use the oscilloscope of Guy to record the signal? no.
- Getting ge p6d probe to work
- about it
- pulse generator
- low part count, 20 Hz - 13 KHz but variable with C1. http://www.maximintegrated.com/app-notes/index.mvp/id/1960
- a2d
- 10 Million samples per second (10 MSPS)
- mixer
- ultrasound general electronics documentation:
- not really interesting
- http://www.ti.com/solution/ultrasound_system TI application note about beam forming UT.
- http://www.bioee.ee.columbia.edu/courses/upload/Bibliography/kim_ultrasonic_2006.pdf - 250 MS/s IC paper.
- not really interesting
- DONE Meeting with Ronen's coworker at GE
- Etgar 4 Tirat Hacarmel, 49/45/47; take train at 8:25 from
Prep day notes
- Bladder monitor
- sensors, can it work with 40Khz cheap distance sensor?
- if not, how cheap can we find an imaging (X MHz ?) sensor? interfaces to RPi?
- build a model, plastic bottles, for development and demo.
- forced drinking for forced urination (> 300 ml / 15 minutes)
- ordering of input/output of sensor
- side by side (like regular distance sensors)
- one on front, one on back
Links
- Bladder
- https://www.ncbi.nlm.nih.gov/pubmed/9366371 Estimating normal bladder capacity in children.
- Transducers
- http://spinoff.nasa.gov/spinoff/spinitem?title=bladder+monitor
- http://www.sensorwiki.org/doku.php/sensors/ultrasound
- http://www.sensorsmag.com/sensors/acoustic-ultrasound/mems-reshapes-ultrasonic-sensing-1066
- General
- Analog to Digital
- Devices
- Theraputic, other uses