On Sat, 25 May 2019 10:13:43 -0500, Elder Jones
wrote:
For Camber, tenths of a degree in repeatability & accuracy would be nice.
Does anyone here know if a typical smartphone can achieve that feat yet?
The MEMS accelerometer used in many smart phones is capable of 0.06
degrees of resolution (not accuracy). The device will need to be
calibrated against a 0 degree horizontal flat surface (easily done by
vertically rotating the MEMS sensor and adjusting for zero change) to
obtain such levels of camber accuracy. The limiting factor is the
sensor noise level.
ADXL213AE datasheet
https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL213.pdf
The typical noise floor is 160 µg/vHz, allowing signals
below 1 mg (0.06° of inclination) to be resolved in tilt
sensing applications using narrow bandwidths (60 Hz).
Note that this MEMS sensor currently sells for about $32/ea which
makes it an unlikely candidate for a consumer grade smartphone.
https://www.digikey.com/product-detail/en/analog-devices-inc/ADXL213AE/ADXL213AE-ND/669792
There are probably better and cheaper sensors available.
If not.
When do you think phones will be able to achieve that accuracy & precision?
When someone finds or creates a market for such a device.
You can try it yourself to see what can be achieved. There are many
electronic bubble level apps for Android and iPhone:
https://play.google.com/store/search?q=bubble+level&c=apps
Most seem to display in 1 degree resolution, but there are a few that
will display 0.1 degree resolution:
https://play.google.com/store/apps/details?id=com.jonyups.poziomicagen
I tried to use various Android apps for aligning satellite dishes,
where +/-0.5 degrees or better accuracy is the norm:
http://www.learnbydestroying.com/jeffl/antennas/dish-new-install-project/
but found that a digital angle level was more useful:
https://www.google.com/search?tbm=isch&q=digital+protractor
These look interesting:
https://express.google.com/u/0/product/15900634407707968640_0_6099994
High accuracy ±0.005°, high resolution 0.001°.
https://express.google.com/u/0/product/KKmoon-DXL3/12101973972988473742_13025317009461916407_6099994
High accuracy ±0.05°, high resolution 0.01°.
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558