Looking for information regarding common mounting practices / hardware for LPR cameras to traffic signals.
The thought that had come to mind is strapping strut to the signal and mounting to that. How do others do it?
Subscriber Discussion
Technique To Mount LPR Camera To Traffic Signals
U
Undisclosed #1
Sep 18, 2017Highway exit ramp to main local road
UI
Undisclosed Integrator #3
Sep 18, 2017Not sure about the last one but the cameras in the top 2 pictures appear to be TDS cameras sending images back to the signalized intersection controller. That arm will move quite a bit, up to a foot or more away from resting, with normal winds. There can also be harmonic vibrations and resonance issues. The TDS camera doesn't typically care since the FOV is usually pretty wide. An LPR camera zoomed to a narrow FOV would likely struggle to maintain accuracy even with significant electronic image stabilization. Hope this helps.
JH
Jay Hobdy
Sep 18, 2017See the same style here.
Whatever it is, you probably need to make sure you do not drill into anything. Not sure about those traffic signals but on concrete poles, everything is attached using clamps. (oversized hose clamps)
I guess they do not want to take the risk of damaging the structural integrity of the pole.
I heard a story about some equipment mounted in the cab of some heavy equipment, like a bull dozer, forklift , etc. Something. Anyway the tech drilled two small holes for some self tapping screws, and nobody would certify the cab still met safety standards. The cab had to be replaced I believe.
BM
Brian Maxwell
Sep 18, 2017Thank you for the info. Pretty much how I figured it'd go.
MM
Michael Miller
Sep 18, 2017Don't use hose clamps. Get yourself a banding tool .
T001 from ISO Stainless on Vimeo.
BM
Brian Maxwell
Sep 18, 2017Michael,
Aside from increased tension which has obvious benefit, are there other reasons this would be superior to just a hose clamp? I found both options defined for traffic applications on a suppliers website which is why I ask.
MM
Michael Miller
Sep 18, 2017Once we used the Bander we never looked back. You get a 100ft role, clips and the tool and you're good to go. No need to carry multiple hoes clamp sizes.
Brian Rhodes
Sep 18, 2017How heavy is the camera?
BM
Brian Maxwell
Sep 18, 2017Camera: 7.5 Lbs
IR Emitter: 12.5 Lbs. This one came with a pole mount using pipe clamp bands.
UI
Undisclosed Integrator #2
Sep 18, 2017I am guessing you are doing this for a city and have their permission. Just don't want you to miss the obvious and not have their permission.
BM
Brian Maxwell
Sep 18, 2017Camera will be mounted by the city though I've been tasked to come up with how to do it.
BM
Brian Maxwell
Sep 18, 2017So we're going to test this out and at this point hope to mount to the vertical pole.
My new question that I hadn't thought of earlier is how do folks get the wire back into the pole and seal it? Is there a traffic specific piece of hardware that folks have used?
It's mentioned earlier to not drill the pole but I'm not sure there's another option.
UI
Undisclosed Integrator #4
Sep 18, 2017The question is Pole Mount or Arm Mount? Banding is traditional and there are cool little clips that are popular. If the City is involved, let their traffic guys mount it.
As for running wires, make sure you have properly rated cables because you are likely to be running along high voltage for the signals in the same pole / conduit.
The traffic guys deal with this on the cameras used for vehicle detection.
BM
Brian Maxwell
Sep 18, 2017I found those and will be using them. Thanks! Now I just need to figure out getting the wire into the vertical pole.
UI
Undisclosed Integrator #4
Sep 19, 2017Usually through the top, sometimes a side entry. I would reach out to CT West and ask for Bill or Dave +1 (951) 691-1385 if the city traffic guys won't wire them.
UI
Undisclosed Integrator #3
Sep 19, 2017If the pole is spun aluminum, drill and tap a PG11 gland into the vertical member above the side arm attachment point. The gland is available in a 90 degree style so preventing water or insect entrance is easy. Remember that most signalized lamps run 120-240VAC so treat the pole like a conduit and don't mix insulators of different values to avoid NFPA 70 issues. The AHJ may require greenfield or similar.
UI
Undisclosed Integrator #3
Sep 18, 2017These are called round member adapters and should be available from any tower supply company if your source doesn't work out.
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