WearableUltrasound

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/
• 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
    • http://www.providianmedical.com/ultrasound-probes/ge/ge-p6d/
  • 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.
• 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://zetroz.com/products/index.php
  • http://www.visualsonics.com/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
  • https://en.wikipedia.org/wiki/Therapeutic_ultrasound
  • http://www.ob-ultrasound.net/history1.html
• Analog to Digital
  • http://www.analog.com/en/analog-to-digital-converters/ad-converters/AD9261/products/product.html 30 MSPS 16 bit
• Devices
  • 100$ transmit only? http://news.cornell.edu/stories/2008/12/grad-student-creates-portable-ultrasound-devices
• Theraputic, other uses
  • Shoulder pain
    • http://scitation.aip.org/content/asa/journal/poma/19/1/10.1121/1.4800272
  • Horses
    • http://www.ultroz.com/