I made a 3d sonar
I used two servos and ultrasonic sensor. Ngl its kinda bad for the reasons ill get into. Sound is bouncing off the barriers and the measures are a mess. Also it has a precision of +-1cm which means it cant really measure distances super precisely. But it is what it is. I didnt want to buy a lidar. If i ever do buy it ill redo this project. I might post code if anyones interested.
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also i forgot to add its fucking abysmally slow
i dont know if its a firmata issue or someting
but it does cca 11 angles per second
that is time=thetha*phi/11 s
if you want to do 90 x 90 deg for example it will take you 12 fukking minutes 😿
Very nice! Interesting to see the results 😄
tnx 🐧
maybe you're interested in this but please don't blame me if you waste a bunch of time 😆: I was wondering if it's possible to do some kind of 3D triangulation with one ultrasonic sensor as sender and multiple as receivers. I don't know enough about audio and how it bounces to say if that's even remotely realistic
update: thanks to @Maderdash its no longer abysmally slow
Unknown User•2y ago
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its (pitch (measured from the z axis), azimuth (measured from x) and the distance mesured
then you also take in the acount that the sonar itself isnt the stabile part but its located on some x0 y0
and you do the math
if you want ill send u papers w calc
i realy dont think i made a math mistake
yes i think so
but the recievers would have to catch that specific frequency
Unknown User•2y ago
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also using servos you only have a 1deg of precision
so you might not aim for the reciever always
also again if its an enclosed space you never know where the sound is bouncing
so yea idk its kinda a "wide" quesion
like
i maybe could figure someting out if i were given very precis description
yea
i mean
Unknown User•2y ago
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its 3 seperate axis
so
Unknown User•2y ago
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you just need to find the formulas
Unknown User•2y ago
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you know about eigenvectors?
and seperate independant coordinates
Unknown User•2y ago
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mind you the thing that i measuring distance is moving
really?
so i can move it for lets say 15.5 deg?
Unknown User•2y ago
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Spherical coordinates - Math Insight
Illustration of spherical coordinates with interactive graphics.
Unknown User•2y ago
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Vector fields in cylindrical and spherical coordinates
Note: This page uses common physics notation for spherical coordinates, in which
θ
{\displaystyle \theta } is the angle between the z axis and the radius vector connecting the origin to the point in question, while
ϕ
{\displaystyle \phi } is the angle between t...
θ
{\displaystyle \theta } is the angle between the z axis and the radius vector connecting the origin to the point in question, while
ϕ
{\displaystyle \phi } is the angle between t...
Unknown User•2y ago
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yea but only +- 1 deg no?
i dont get this?
Unknown User•2y ago
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im confused now
Unknown User•2y ago
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its servo.write(degrees) no?
i mean full description i dont
someting with pulses
yadayada idk
:((
Ill take this to #general
my bad mr mod man
Unknown User•2y ago
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Thanks
I might post it on github
But if you can use lidar like tf luna if you plan on replicating it
You will achieve much greater precision
Unknown User•2y ago
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I'ma try that
Unknown User•2y ago
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port it to vr and make one of these lidar horror game irl
That's a cool idea for the future
Unknown User•11mo ago
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You do know the user is useing Ultrasonics. I mean it should be even better if you use lidar, but just a note.
Unknown User•11mo ago
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No man
I didn't touch Arduino in quite sometime now
Also yea lidar would work way better
As maderdash said
I guess I could attempt to build the robot that maps space around it or something