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allfox
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Re: UFO detector?

Fri Jun 19, 2015 3:46 pm

Ah, and the idea that watch the film for 7/24 by human to make sure, I finally get it :D . Yup, it must be human to work! :D

Heater
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Re: UFO detector?

Fri Jun 19, 2015 4:14 pm

@groovmuffn,
Actually if you just set up some conditionals (OpenCV) you can rule out...
No doubt. This starts to get complicated. Especially as we have no definition of what we are supposed to be detecting.

@allfox,
...it's a Boeing 737... not boring
When I say "boring" I mean boring. As opposed to something interesting like an actual Alien visitation.
I think use a single camera with some kind of "track" ability is not that good.
I thought so too. The camera movement idea makes motion detection a lot harder I would imagine. Actual tracking a moving thing with a pan and tilt camera could be quite a challenge.

DougieLawson,
You can use my random python program to help predict when the UFO is overhead.
Is that random.random in your example actually a source of randomness or just a pseudo random number generator. Obviously the latter would not work at all.

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DougieLawson
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Re: UFO detector?

Fri Jun 19, 2015 5:05 pm

That random number came from a call to the python random library. It will turn up again at some point in the future of the universe.
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Heater
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Re: UFO detector?

Fri Jun 19, 2015 5:27 pm

Well, yes, with a pseudo random number generator or a real source of randomness constrained to a given number of bits any particular number will turn up again and again between now and the end of time.

However the pseudo random number generator is just a machine ticking around predictably where as real randomness is not.

Ergo, we want the latter, the good stuff. You are never going to detect aliens by reading numbers out of a table, which is effectively what a PRNG does.

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kusti8
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Re: UFO detector?

Fri Jun 19, 2015 5:36 pm

There's Random.org Which is supposedly true randomness by measuring atoms and has an API as well. Not sure how well it works.
There are 10 types of people: those who understand binary and those who don't.

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DougieLawson
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Re: UFO detector?

Fri Jun 19, 2015 6:12 pm

I've configured all of my Raspberry Pis with

Code: Select all

bcm2708-rng
in /etc/modules so that I get /dev/hwrng (the hardware random number generator). My random entropy comes from that on-board hardware source.
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Heater
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Re: UFO detector?

Fri Jun 19, 2015 7:54 pm

@kusti8,

I guess random.org is quite excellent and legitimate. However there are a couple of problems with that solution:

1) Why would I trust anybody to generate random numbers for me? You never know if they are compromised or not.

2) You are then detecting aliens at wherever random.org is located. Not in your back yard as required here.

@DougieLawson

bcm2708-rng sounds great. Anyone know how it actually generates it's randomness?

I have a bit of a problem with it:

Code: Select all

# modprobe bcm2708_rng 
# lsmod                                                       
Module                  Size  Used by                                           
bcm2708_rng             1196  0
bcm2835_v4l2           40878  0  
...bla...bla...
                  
# ls   /dev/hwrng                                             
ls: cannot access /dev/hwrng: No such file or directory                         
How do I get hwrng working ?

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DougieLawson
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Re: UFO detector?

Fri Jun 19, 2015 8:20 pm

Here's the documentation for it: http://scruss.com/blog/2013/06/07/well- ... generator/

I've no idea where the H/W gets it's entropy.
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Heater
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Re: UFO detector?

Fri Jun 19, 2015 8:34 pm

Yeah, no joy with my hwrng. But then this is not raspian but a resin.io Pi B+ boot image. http://resin.io I guess I have to get on to them about it.
Last edited by Heater on Fri Jun 19, 2015 9:13 pm, edited 2 times in total.

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DougieLawson
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Re: UFO detector?

Fri Jun 19, 2015 8:39 pm

Does bcm2708_rng show up on a lsmod? [Note: It's the same module for a RPi2B with a 2709 processor.]
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Heater
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Re: UFO detector?

Fri Jun 19, 2015 8:45 pm

Yes it does, see post above. This is a B+.

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DougieLawson
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Re: UFO detector?

Fri Jun 19, 2015 9:10 pm

Heater wrote:Yes it does, see post above. This is a B+.

Code: Select all

[email protected] /dev # cat hwrng | od
0000000 014345 121370 067355 022622 026306 135222 050375 132222
0000020 154310 113100 116656 171467 026637 003047 166272 006717
0000040 132272 024615 044026 036414 073162 144541 050510 175753
0000060 062640 011424 167376 061201 066563 115340 024125 167550
0000100 177177 050414 154650 027164 142146 040755 147230 067620
0000120 155254 111423 014272 100207 176443 030004 103001 041663
0000140 020345 053774 067245 062061 115672 076774 056051 157766
0000160 051577 021605 150627 145571 140434 122475 024302 136252
0000200 003021 115022 011064 036750 101104 005412 143413 051057
0000220 020075 053614 153176 000554 064017 007513 176757 125721
0000240 014225 175256 032166 061224 113624 112157 161752 065153
gets lots and lots of lovely randomness.
Microprocessor, Raspberry Pi & Arduino Hacker
Mainframe database troubleshooter
MQTT Evangelist
Twitter: @DougieLawson

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Heater
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Re: UFO detector?

Fri Jun 19, 2015 9:15 pm

That's great, I want some :)

Heater
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Re: UFO detector?

Fri Jun 19, 2015 9:43 pm

Yay, I got some hwrng goodness:

Code: Select all

# od -Ax -N256 /dev/hwrng                                     
000000 154213 130271 073031 020334 072745 036340 067474 165246
000010 001647 031072 152106 050332 156247 164456 121023 014617
.....
Just had to ensure that "udevd & udevadm trigger" got run at start up.

Now I'm all set to detect UFOs out here in the middle of the Finnish forest. Camera and all:
http://bccbb0d6f38d1c3dec17eaeddc737106 ... device.io/

:)

Mai
Posts: 10
Joined: Thu Jun 18, 2015 3:21 pm

Re: UFO detector?

Fri Jun 19, 2015 10:42 pm

Mai wrote:
joan wrote:
Mai wrote:
There is an updated Pi2 version of servoblaster linked to from the author (tag rgh on this site). It's just that the github version has not been updated.
Which would you use?
If all you wanted to do was control servos I would probably use servoblaster if I were you. If you want to do other things with the gpios as well as drive servos I'd use pigpio. However I'm the author of pigpio so I am biased.
Just 2 servos for pan and tilt.
I figured you were the author of pigpio, since your avatar here, matches the one on your site.
Very nice. I'll go with pigpio, since it seems to be real flexible.
In the PIC18 world, I used the high priority interrupt generated by timer1 to output to 20 servos, but under linux, which is not an RTOS, how can you pull it off without any jitter?
Say you are comparing the new image with the reference image, which is cpu and gpu intensive, is there a mechanism to assign priorities to tasks? better yet, could you recommend a book or site that teaches linux on RPI in depth?
I know I have a lot of learning in front of me, but I have to start some where. Just finding a starting point amongst so much on the web, is a daunting task by itself.
Thanks for answering my query and not being a douche like the rest of these clowns.

Heater
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Re: UFO detector?

Sat Jun 20, 2015 1:03 am

You won't find a book that teaches Linux on the Pi in depth. Why would there need to be one? Linux is Linux no matter what it runs on. You will find lot's of books on Linux and you will find lot's of books on the Pi. See amazon.

You can use the "nice" command to run a process at a higher or lower priority than normal. http://linux.die.net/man/1/nice

If you end up writing your own code in C then you can assign priorities to individual threads within a process by using the pthreads library. Similarly with various thread libraries in C++.

Tobias Claren
Posts: 1
Joined: Mon Aug 17, 2015 7:27 pm

Re: UFO detector?

Mon Aug 17, 2015 7:50 pm

Hello.

For some time I try to convince peoplefor this method.
But I have no electronic or programming knowledge.

My first version to inspire/excite people with skills (english is not my mother language):



XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
„S.E.T.A.“ - Search for Extraterrestrial Activities

Idea:

A crowdsourced (bought and operated by the people, clubs, NGOs etc.) network of sensors and cameras, for the detection of extraterrestrial activities in the Earth's atmosphere.

Every sensor station send his data live to a server.
Measured values from two or more stations may allow live cross bearing of the position.
A live view on a world map would be conceivable. Similar to "flightradar24".
Also the calculation of the velocity and direction of flight.
Potential witnesses can be informed by app, email etc..
Based on their GPS position, and the calculated speed and flight direction of the anomaly.
Also before the arrival in their visibility.
These potential witness crowd, can make also photos and videos. With a smartphone or with better Equipment.
Also without own sensor bases. Only with a free app.



Technical realization:
A cheap wide spread base, like Arduino and/or Raspberry PI, or Banana PI.
Supplemented by cheap sensors (like in modern smartphones) and optional camera(s).
Sensor modules that can be connected by laymen (USB, PI-Connector...) with the base.
And a preconfigured Linux System, easy to use for everybody.
Copy or install to SD-Card, and ready.



Sensors:

Very important:
1.) Accelerometer („gravity sensor“, „g-sensor“ "gravimeter"):
To detect theoretical exotic gravitational drives.
For example, in the Note 3 Phablet Smartphone is a "MPU6500 Acceleration Sensor" from "Invensense".
Better: A „Low-G“ Accelerometer IC/Chip.
We do not need a very high clock rate (like the Oculus Rift with 1000hz against motion sickness), or high maximum G-force. But a high sensivity.

2.) Magnetic field sensor („compass“, „magnetometer“):
For the detection of magnetic fields, as a waste product of the theoretical electric gravitational drive.
For example, in the Note 3 phablet smartphone is a "YAS532 Magnetic Sensor" from "YAMAHA Corporation" included.
Better: A „Low-Tesla“ Magnetic Sensor IC/Chip.


Useful:
Geiger-Mueller counter:
Measurement of ionizing radiation.
E.g .:
https://www.cooking-hacks.com/documenta ... -tutorial/


Possibly helpful:
3.) Pressure Sensor (Barometer):
Maybe for detecting local barometric pressure changes.
For example, as a result of near strong gravitational anomalies.
Sensor chip, e.g. available from Bosch.
For example, in modern Samsung smartphones.


Dispensable:
3.) Gyroscope („Gyro“):
Perhaps as evidence of non-movement of the device.


Not important:
5.) Thermometer:
No known effects from UFOs.
For example, in the Note 3 is a "SHTC1 Ambient Temperature Sensor" from "Sensirion" included.

6.) Humidity sensor:
No known effects from UFOs.
For example, in the Note 3 is a "SHTC1 relative humidity sensor" of "Sensirion" included.


Camera(s):

Optional to the sensors, it would be possible to connect cameras.
In the case of sensory abnormalities, photos and video would automatically generated, and send after completion automatically copies to the server.

All types of cameras with USB (also webcams), network cameras of every price range, surveillance cameras (with a USB security DVR Video “card”) etc ..
The operator of a base would uniquely specify the compass direction and elevation angle of each camera.



Dual-Use:
The bases could be simultaneously used as free Wi-Fi hotspots.
For example, "Freifunk", an open mesh network with (not necessarily) free internet access without the needing of registration or log-in.
But we can advertise on an automatic startup homepage for using detectors and/or the free alarm/map app. A symbiosis. More potential users. Interested people for WiFi hotspots and UFO detectors.

Optional use of old / cheap smartphones:
Maybe it lowers the barrier to entry for some people.
Smartphones are small computers with Accelerometer and field sensor, and internet connection through Wifi or mobile radio.
The MP camera at the back side could aligned to the Sky, the webcam at the front could taped lighttightly be used as a simple geiger-mueller counter.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Sheaffy
Posts: 2
Joined: Wed Jan 03, 2018 11:05 am

Re: UFO detector?

Wed Jan 03, 2018 11:21 am

Tobias Claren wrote:
Mon Aug 17, 2015 7:50 pm
Idea:

A crowdsourced (bought and operated by the people, clubs, NGOs etc.) network of sensors and cameras, for the detection of extraterrestrial activities in the Earth's atmosphere.

Every sensor station send his data live to a server.
Measured values from two or more stations may allow live cross bearing of the position.
A live view on a world map would be conceivable. Similar to "flightradar24".
Also the calculation of the velocity and direction of flight.
Potential witnesses can be informed by app, email etc..
Based on their GPS position, and the calculated speed and flight direction of the anomaly.
Also before the arrival in their visibility.
These potential witness crowd, can make also photos and videos. With a smartphone or with better Equipment.
Also without own sensor bases. Only with a free app.



Technical realization:
A cheap wide spread base, like Arduino and/or Raspberry PI, or Banana PI.
Supplemented by cheap sensors (like in modern smartphones) and optional camera(s).
Sensor modules that can be connected by laymen (USB, PI-Connector...) with the base.
And a preconfigured Linux System, easy to use for everybody.
Copy or install to SD-Card, and ready.

Camera(s):

Optional to the sensors, it would be possible to connect cameras.
In the case of sensory abnormalities, photos and video would automatically generated, and send after completion automatically copies to the server.

All types of cameras with USB (also webcams), network cameras of every price range, surveillance cameras (with a USB security DVR Video “card”) etc ..
The operator of a base would uniquely specify the compass direction and elevation angle of each camera.

This may be a little late however I have started a side project of mine independently of what you just recommended. I too came up with this idea and agree with everything you have said.. A crowd sourced approach that is cheap and simple is the way to go.

Fortunately I do have the technical ability to create such a system, including a central server/web-server to collect and then run trained AI to predict what likely hood of a UFO being in the clip is.

This system is suitable for a raspberry pi, but can run on any machine with python installed.
It has two types of tracking methods, each developed for their time of day, Night time tracking and Daytime tracking.
The system in in early days, only two days worth of coding however the script itself already completes the main objective of tracking and recording clips of objects in the sky..

I am even running a predictive filter called a Kalman filter which I am using to see if their is sudden unexpected changes in velocity which might indicate a UFO.

On the readme it has a "The Vision" section where it lays out what the aim of this project is.
The code is early days and not as clean as I would like it to be.. but people are welcome to make a branch and help out!

Github Repo : https://github.com/Sheaffy/UFOTracker

Regards
Sheaffy

Heater
Posts: 9821
Joined: Tue Jul 17, 2012 3:02 pm

Re: UFO detector?

Wed Jan 03, 2018 1:18 pm

Is it so that after half a year since the start of this thread no UFO's have been detected?

Sheaffy
Posts: 2
Joined: Wed Jan 03, 2018 11:05 am

Re: UFO detector?

Wed Jan 03, 2018 1:43 pm

Heater wrote:
Wed Jan 03, 2018 1:18 pm
Is it so that after half a year since the start of this thread no UFO's have been detected?
Haha!! no idea if they even started, To be honest I'm looking for more meteor showers and things like that. however it will also pick up UFO's.. Never know might pick up some interesting things.

Heater
Posts: 9821
Joined: Tue Jul 17, 2012 3:02 pm

Re: UFO detector?

Wed Jan 03, 2018 2:02 pm

We all like to have a giggle at those for whom "UFO" means "alien visitors" and build all kind of stories around it.

But here is a little story...

Back in 1980, something, I was working at a company that made radars. A clever young electronics engineer got all hung up on ghosts. So sure enough he built a ghost detector. This marvel of electronics had sensors for temperature, humidity, vibration, ultra sonics, air movement, magnetic field changes, all kind of things. It had a microprocessor system to read all those sensors and log the results. It was smallísh (for 1980), portable and battery powered. It could be left all night long in a possibly haunted place.

We all thought he had lost his mind.

Well, I don't know if he ever detected any ghosts but soon he quit the company and started a business selling that machine.

Turned out that what he had built was an ideal solution for logging all kinds of measurements, unattended at remote locations. Of course lot's of people wanted such a thing for more practical purposes.

So, who knows where your efforts may lead.

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