Do tripwires work at night with IR illumination?

Wallop

n3wb
Feb 21, 2025
11
5
New Zealand
My camera is a IPC-T54IR-ZE-S3 and the tripwire seems to be hit and miss at night. The only light source is moon/star light. The IR on the camera is working and smart ir is disabled.

Cheers

Mike
 
Generally speaking yes.

But like any scene, day or night, the placement, sensitivity, and other image settings can make it work better or worse.

Show us your scene with the tripwire and settings
 
Typically if it doesn't work at night you are trying to do too much with one field of view.

As requested, please post your field of view with IVS rules shown and we can tell you almost immediately if it should work.

Also, you have to not be using auto/default settings and dialed the camera in to your field of view for brightness, contrast, shutter speed, etc. to get the best performance.
 
The trip wires are in the foreground and people / objects are passing behind not through them. The clue here is look at the wires in relation to the tree trunks. You need to think 3 dimensionally.

Where is it you want them to be tripped? If someone passes through the trees? Walks down the public footpath? Comes down the road? That's going to affect your placement. When I put one of my cameras up I had some placed horizontally for people to cross, and they were walking behind the ends despite drawing them in a manner that appeared to competely block the path area I was protecting. I could watch people live on video walk through the scene behind them. I had to re-draw them.

eg. If I was trying to trigger on the footpath, I'd be drawing them horizontally front to back in the picture and taking the ends right out to the edge of the verge from the front edge of the picture.

I'd also add in a hortizontal trip wires left to right to cover someone walking throuigh the trees towards the camera as that's the main area you need to protect anyway. LIttle point protecting the footpath and not your home.
 
I am not the OP. My setup captures exactly what I want it to: people on the path walking from the left to the right. I was only giving an example of a simple tripwire in a pitch black scene.

These are not the only cameras I have in this area. The sole job of these is to get captures on the footpath. I don’t care if they come through the trees.
 
Ah Ok. Though that was their picture but it's early. If it's working how you need it to then that's fine. My experience of trips is they're the best but placement can be crucial as you're trying to draw a 2d line in a 3d scene and objects can pass behind if you're not careful.