Scientists detect seismic waves traveling through Martian coreOK Jan, here’s a task for you seeing as you say you have work
https://www.sciencedaily.com/releases/2023/04/230424162852.htm
On a sunny day (Tue, 25 Apr 2023 05:30:32 -0700 (PDT)) it happened Lou <noeltu...@live.co.uk> wrote in
<3ddb2e9f-2103-48d7...@googlegroups.com>:
On Tuesday, 25 April 2023 at 05:16:59 UTC+1, Jan Panteltje wrote:
Scientists detect seismic waves traveling through Martian coreOK Jan, here’s a task for you seeing as you say you have work
https://www.sciencedaily.com/releases/2023/04/230424162852.htm
experience in photodetectors, electronics etc. >https://www.sciencedaily.com/releases/2023/04/230420135314.htm
The above link comes from another article I found on science daily.
They mention optomechanical sensors. Here’s a quote from the paper.
“ Optomechanical sensors measure forces that disturb a mechanical s= >ensing device that moves in response. That motion is then measured with lig=
ht waves. In this experiment, the sensors were membranes, which act like dr=
um heads that vibrate after experiencing a push. Optomechanical sensors can=
function as accelerometers, which can be used for inertial navigation on a=
planet that doesn't have GPS satellites or within a building as a person n=
avigates different floors.”
I’ve tried to work out the meaning of this description , in particu=Its interesting, I tried using a 3 axis piezo accelerometer chip: https://panteltje.nl/panteltje/xgpspc/index.html
lar the first sentence.
But it’s not clear what happens physically. As usual for published = >reviewed papers.
Does the membrane drum head vibrate seperately from the laser part
of the device?
I would have thought that whatever vibrates the membrane would also
vibrate the laser interferometerpart of the device.
In other words if both laser interferometer and sensor membrane are >vibrating then no intereference would be created to be measured.
Seeing as relative to each other, they don’t move.
Is it the case that the membrane vibrates with the laser interferometer >part but because the membrane is more flexible it vibrates seperately
from the interferometer?
And that seperate vibration is measured by the laser interferometer
part of the device?
What I dont understand is how does the enclosed system
work as an accelerometer. Like for instance the bit about walking
around a building. What is it in “walking around the building�€=
that makes
the membrane move,...but not the interferometer part of the device?
I did some experiments to see if I could use such a chip for
inertial navigation, but the temperature drift was too much.
It does need a temperature stabilized oven.
Then after that some university did the same sort of experiment...
Google MPU6050, that is the chip I used
My smartphone likely has some similar chip in it
it gives you tilt etc
So, maybe the 2 'membranes' method in the link you gave will do better, we will see !
I find the 'entangled' quantum jive not clear.
There is a lot to do about entanglement for example for encrypted communication...
But what exactly it is?
membranes, those are sensitive to sound too... microphones work that way.
They ask money for that article, but the original website shows a picture https://news.umich.edu/quantum-entanglement-could-make-accelerometers-and-dark-matter-sensors-more-accurate/Typical. Pay money and find out the paper says absolutely
Under the picture the text:
"An array of membranes, each probed by laser beams that are entangled with one another,
could enable miniaturized yet highly accurate devices for measuring acceleration, dark matter and more."
Sure, using more than one sensor will reduce noise, entangled or not I'd think
Here is my measurement of the temperature drift and noise from that MPU6050 Several years ago, posted about it back then.
There are many laser gyroscopes around.. https://en.m.wikipedia.org/wiki/Ring_laser_gyroscope
On Tuesday, 25 April 2023 at 05:16:59 UTC+1, Jan Panteltje wrote:
Scientists detect seismic waves traveling through Martian coreOK Jan, here’s a task for you seeing as you say you have work
https://www.sciencedaily.com/releases/2023/04/230424162852.htm
experience in photodetectors, electronics etc. >https://www.sciencedaily.com/releases/2023/04/230420135314.htm
The above link comes from another article I found on science daily.
They mention optomechanical sensors. Here’s a quote from the paper.
“ Optomechanical sensors measure forces that disturb a mechanical s=
ensing device that moves in response. That motion is then measured with lig= >ht waves. In this experiment, the sensors were membranes, which act like dr= >um heads that vibrate after experiencing a push. Optomechanical sensors can=
function as accelerometers, which can be used for inertial navigation on a= planet that doesn't have GPS satellites or within a building as a person n=
avigates different floors.”
I’ve tried to work out the meaning of this description , in particu=
lar the first sentence.
But it’s not clear what happens physically. As usual for published = >reviewed papers.
Does the membrane drum head vibrate seperately from the laser part
of the device?
I would have thought that whatever vibrates the membrane would also
vibrate the laser interferometerpart of the device.
In other words if both laser interferometer and sensor membrane are
vibrating then no intereference would be created to be measured.
Seeing as relative to each other, they don’t move.
Is it the case that the membrane vibrates with the laser interferometer
part but because the membrane is more flexible it vibrates seperately
from the interferometer?
And that seperate vibration is measured by the laser interferometer
part of the device?
What I dont understand is how does the enclosed system
work as an accelerometer. Like for instance the bit about walking
around a building. What is it in “walking around the building=
that makes
the membrane move,...but not the interferometer part of the device?
On Tuesday, 25 April 2023 at 14:27:25 UTC+1, Jan Panteltje wrote:
On a sunny day (Tue, 25 Apr 2023 05:30:32 -0700 (PDT)) it happened Louer.
<noeltu...@live.co.uk> wrote in
<3ddb2e9f-2103-48d7...@googlegroups.com>:
On Tuesday, 25 April 2023 at 05:16:59 UTC+1, Jan Panteltje wrote:
Scientists detect seismic waves traveling through Martian coreOK Jan, here’s a task for you seeing as you say you have work
https://www.sciencedaily.com/releases/2023/04/230424162852.htm
experience in photodetectors, electronics etc.
https://www.sciencedaily.com/releases/2023/04/230420135314.htm
The above link comes from another article I found on science daily.
They mention optomechanical sensors. Here’s a quote from the pap=
l s=
“ Optomechanical sensors measure forces that disturb a mechanica=
dr=ensing device that moves in response. That motion is then measured with = >lig=
ht waves. In this experiment, the sensors were membranes, which act like=
icu=um heads that vibrate after experiencing a push. Optomechanical sensors = >can=
function as accelerometers, which can be used for inertial navigation o= >n a=
planet that doesn't have GPS satellites or within a building as a perso= >n n=
avigates different floors.”
I’ve tried to work out the meaning of this description , in part=
ed =lar the first sentence.
But it’s not clear what happens physically. As usual for publish=
reviewed papers.
Does the membrane drum head vibrate seperately from the laser part
of the device?
I would have thought that whatever vibrates the membrane would also
vibrate the laser interferometerpart of the device.
In other words if both laser interferometer and sensor membrane are
vibrating then no intereference would be created to be measured.
Seeing as relative to each other, they don’t move.
Is it the case that the membrane vibrates with the laser interferometer=
€=part but because the membrane is more flexible it vibrates seperately
from the interferometer?
And that seperate vibration is measured by the laser interferometer
part of the device?
What I dont understand is how does the enclosed system
work as an accelerometer. Like for instance the bit about walking
around a building. What is it in “walking around the building=
I ignore the quantum entanglement stuff. QT is all nonsensethat makesIts interesting, I tried using a 3 axis piezo accelerometer chip:
the membrane move,...but not the interferometer part of the device?
https://panteltje.nl/panteltje/xgpspc/index.html
I did some experiments to see if I could use such a chip for
inertial navigation, but the temperature drift was too much.
It does need a temperature stabilized oven.
Then after that some university did the same sort of experiment...
Google MPU6050, that is the chip I used
My smartphone likely has some similar chip in it
it gives you tilt etc
So, maybe the 2 'membranes' method in the link you gave will do better, w= >e will see !
I find the 'entangled' quantum jive not clear.
There is a lot to do about entanglement for example for encrypted communi= >cation...
But what exactly it is?
as QT is a theory for priests only seeing as photons don’t exist.
I’m trying to find out how the actual device works physically
Does the membrane part vibrate seperately from the laser part?
I’m assuming it must because otherwise if both vibrate in unison.
....No interference would be detected.
I’m assuming these are not ring gyros as gyros don’t need a=
seperate
membrane to vibrate to measure change in rotation.
This is something else I’m not familiar with.
I wish these people writing the papers stop attributing
classical interference effects as quantum effects.
Total nonsense.
membranes, those are sensitive to sound too... microphones work that way.=
Yes exactly. So are these “quantum “ devices just hi tech m=
icrophones?
Ie...sound waves vibrate membrane and very sensitive optical
interferometer picks up,vibrations?
If so it still doesn’t make sense.
How would moving around a room or a building vibrate the
membrane? Air pressure?
They ask money for that article, but the original website shows a picture=
On a sunny day (Tue, 25 Apr 2023 06:50:43 -0700 (PDT)) it happened Lou <noeltu...@live.co.uk> wrote inYes, so its momentum which deforms the membrane shape relative to
<502e40b7-53ff-4160...@googlegroups.com>:
On Tuesday, 25 April 2023 at 14:27:25 UTC+1, Jan Panteltje wrote:
On a sunny day (Tue, 25 Apr 2023 05:30:32 -0700 (PDT)) it happened Louer.
<noeltu...@live.co.uk> wrote in
<3ddb2e9f-2103-48d7...@googlegroups.com>:
On Tuesday, 25 April 2023 at 05:16:59 UTC+1, Jan Panteltje wrote:
Scientists detect seismic waves traveling through Martian coreOK Jan, here’s a task for you seeing as you say you have work
https://www.sciencedaily.com/releases/2023/04/230424162852.htm
experience in photodetectors, electronics etc.
https://www.sciencedaily.com/releases/2023/04/230420135314.htm
The above link comes from another article I found on science daily.
They mention optomechanical sensors. Here’s a quote from the pap=
l s=
“ Optomechanical sensors measure forces that disturb a mechanica=
lig=ensing device that moves in response. That motion is then measured with =
dr=ht waves. In this experiment, the sensors were membranes, which act like=
can=um heads that vibrate after experiencing a push. Optomechanical sensors =
n a=function as accelerometers, which can be used for inertial navigation o=
icu=planet that doesn't have GPS satellites or within a building as a perso= >n n=
avigates different floors.”
I’ve tried to work out the meaning of this description , in part=
ed =lar the first sentence.
But it’s not clear what happens physically. As usual for publish=
reviewed papers.
Does the membrane drum head vibrate seperately from the laser part
of the device?
I would have thought that whatever vibrates the membrane would also
vibrate the laser interferometerpart of the device.
In other words if both laser interferometer and sensor membrane are
vibrating then no intereference would be created to be measured.
Seeing as relative to each other, they don’t move.
Is it the case that the membrane vibrates with the laser interferometer=
I ignore the quantum entanglement stuff. QT is all nonsensepart but because the membrane is more flexible it vibrates seperatelyIts interesting, I tried using a 3 axis piezo accelerometer chip:
from the interferometer?
And that seperate vibration is measured by the laser interferometer
part of the device?
What I dont understand is how does the enclosed system
work as an accelerometer. Like for instance the bit about walking
around a building. What is it in “walking around the buildingï= >��€=
that makes
the membrane move,...but not the interferometer part of the device?
https://panteltje.nl/panteltje/xgpspc/index.html
I did some experiments to see if I could use such a chip for
inertial navigation, but the temperature drift was too much.
It does need a temperature stabilized oven.
Then after that some university did the same sort of experiment...
Google MPU6050, that is the chip I used
My smartphone likely has some similar chip in it
it gives you tilt etc
So, maybe the 2 'membranes' method in the link you gave will do better, w= >e will see !
I find the 'entangled' quantum jive not clear.
There is a lot to do about entanglement for example for encrypted communi= >cation...
But what exactly it is?
as QT is a theory for priests only seeing as photons don’t exist.
I’m trying to find out how the actual device works physically
Does the membrane part vibrate seperately from the laser part?
I’m assuming it must because otherwise if both vibrate in unison.
....No interference would be detected.
I’m assuming these are not ring gyros as gyros don’t need a=
seperate
membrane to vibrate to measure change in rotation.
This is something else I’m not familiar with.
I wish these people writing the papers stop attributing
classical interference effects as quantum effects.
Total nonsense.
membranes, those are sensitive to sound too... microphones work that way.=
Yes exactly. So are these “quantum “ devices just hi tech m= >icrophones?
Ie...sound waves vibrate membrane and very sensitive optical >interferometer picks up,vibrations?
If so it still doesn’t make sense.
How would moving around a room or a building vibrate the
membrane? Air pressure?
They ask money for that article, but the original website shows a picture=
I think the word 'vibration' is wrongly used here.
What happens, if you start moving, is that such a membrane momentarily bends.
Then the laser interference pattern appears.
If you stop moving it bends the other way, so acceleration and de-acceleration causes
an interference pattern.
If you keep track of those patterns (in 3 directions, 3 dimensions if you will)
so you need 3 setups to begin with,
then you could with some precision calculate how far you moved in x, y, z direction.
Simple.
But a lot of precision required.
I wonder if instead of a membrane maybe a simpler cheaper setup
like: an interference wedge for each x,y,z axis.The two glass
plates in each wedge would be seperated by a flexible
material. Allowing movement in one of the glass plates
relative to the other rigid plate. Only a monochromatic light
source is neccesary. And the spacing of
the interference patterns would change with movement.
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