Author Topic: The uBeam FAQ  (Read 277643 times)

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Offline Howardlong

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Re: The uBeam FAQ
« Reply #1250 on: July 31, 2018, 11:09:16 pm »
I can't find any evidence that they've moved myself, their old place is off market, whatever that means.

Cleaning up the hazmat?

 

Offline StillTrying

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Re: The uBeam FAQ
« Reply #1251 on: July 31, 2018, 11:28:25 pm »
Sr. Technician -
Marina del Rey, California, United States · Engineering
 We are seeing a hands-on and enthusiastic Senior Technician to support engineering development and fabrication of high performance ultrasonic transducers.

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Sound judgment,  :-DD

https://ubeam-inc.workable.com/j/0BB01F29B9

Offline PaulReynolds

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Re: The uBeam FAQ
« Reply #1252 on: August 01, 2018, 04:23:29 am »
For those wanting to play around with ultrasonic phased arrays, this open access paper and toolset might be of help.  It seems pretty comprehensive and the team that worked on it at Bristol University are well respected.

https://ieeexplore.ieee.org/document/8094247/

Quote
The system hardware consists of a driver board capable of reading the amplitude and phases produced by the software and then generating half-square wave driving signals of up to 17 Vpp and π /5 phase resolution for 64 individual channels. Up to 15 boards can be chained to increase the number of channels. A set of 64 phases can be updated 25 times per second. For complex and fast field modulations, it is also possible to upload onto the board up to 32 phase patterns and a script that exactly specifies how many periods each pattern should be emitted.

For a wide uptake of Ultraino, we provide source code, components list, PCB designs, as well as video instructions for assembling the board and example arrays for applications in particle levitation, mid-air ultrasonic haptics and parametric audio (Supplementary Movies and https://github.com/asiermarzo/Ultraino). A PC running the software, driver board, and an array are shown in Fig. 1.
 

Offline JimRemington

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Re: The uBeam FAQ
« Reply #1253 on: August 02, 2018, 01:40:26 am »
Not sure what the phrase "π /5 phase resolution" means. Can someone explain?
 

Offline coppice

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Re: The uBeam FAQ
« Reply #1254 on: August 02, 2018, 01:54:29 am »
Not sure what the phrase "π /5 phase resolution" means. Can someone explain?
π /5 radians phase resolution
 
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