IPVMU Certified | 08/26/15 10:38pm
Can cameras be installed on the crib?
Also, I don't quite understand how the algae plays a role in the problem? Are the cameras there to detect the presence of algae near the intake, or people tresspassing on the crib?
Fascinating article. Thanks.
First let's get the all weather thing off the table. Clearly, certain conditions, like heavy fog/precipitation are going to severly limit even a camera at 1000 ft. Assuming this is an optical camera there are times when it will be useless.
But could a camera at such a distance be useful to detect unwanted visitors during other condidtions? I would think it could be, but probably there are cheaper ways.
A couple things to note, unless we are talking about paratroopers/frogmen, we are talking about a craft, which should be easier to detect than a figure alone. Also, the crib only has one way in, (unless grappling, in which case that can be done from the far side without detection in any case), so a choke point of sorts. If IR illuminators can be installed at the crib towards the entrance, then that would enable night vision. If not, long range IR laser illuminators could be used.
Of course whether this is what they actually have is a another matter and I support your calling BS on the whole affair on the toledo blog. But to your actual question, I think the answer is yes, sometimes.
From the camera calculator I punched a few datapoints and got this:
Mind you these settings are relatively benign, the Cohu-HD for instance has a focal length of 1667mm, which I would use but the camera calculator is limited to AOV's of at least 1.
Of course the question is why not install a point to point wireless link and camera in the crib? I have no idea. And they already have a 5MP camera on a solar powered floating buoy a few hundred(?) feet away from the crib!!! Apparently aimed towards shore...
Pentax has a very expensive long range lens with "atmospheric reduction" capabilities that can combat fog and heat rays which become amplified in long distance.
No conventional camera will work at night over such range. I am not even sure if laser based cameras have a chance at that distance.
[Fun] Not a security camera but the Nikon P900 have a very impressive zoom for a small form factor: https://www.youtube.com/watch?v=2oScEo5aRek
I n my opinion, the best way I would to tackle this application is to utilize a pair of powerbeam 5AC-500 (PBE-5AC-500) with an IP based PTZ camera. The distance from the water intake crib to the low service pumping station is only ~3miles. At that distance, your RF signal levels would be ~-50dBm(+/- a few dB) with an easy 100Mbps+ through. You could possibly utilize a pair NBE-5AC-19 (Dunno, I have a thing with plastic mounts... not too fond of them) and still get a 33dB fade margin with 29Mbps at -96dBm. The 5AC-500 works fantastic at 5 miles over water (reliably) at 100Mbps of bandwidth (200Mbps Aggregate).
[Note - Cohu Employee]
The new RISE 4260HD camera from CohuHD Costar can see through atmospheric obscurants at 3 miles (or more).
Here is video at 2.5 miles through fog: Long-range with Defog
Yes with human detection range: up to 8 km which is 4.9709695 miles or 4.3196544 miles (nautical).
All you have to do is get a Spynel - X from HGH Infrared Systems, their into Optronics for Security. If you need help let me know.