CatDogFoxBot #5 : Collecting Some Temperature Data

RE: CatDogFoxBot #5 : Collecting Some Temperature Data

BigG — Wed, 07 Aug 2019 11:03:32 GMT

Just thought of something. Instead of the suggested ultrasonic sensor to help detect distance of object you could actually limit distance (assuming that is possible in your case) by placing something, like a large flower box, in the field of view.

Thus your grid eye will only detect objects in front of this, say flower box, and as you have a fixed object in view it cannot detect what is behind that flower box.

[View:/resized-image/__size/620x620/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-2898dc48-8f28-4297-9850-f085680d33bf/7701.contentimage_5F00_204100.png:620:620]

RE: CatDogFoxBot #5 : Collecting Some Temperature Data

BigG — Mon, 05 Aug 2019 22:33:20 GMT

Have you thought about adding another sensor into the mix?

From the looks of things you need to have a way of determining how far the object is away and then cross reference this with the grid eye data. An ultrasonic sensor came to mind as this is pretty good at distance estimation below 1 metre and its field of view is not too narrow.

RE: CatDogFoxBot #5 : Collecting Some Temperature Data

genebren — Thu, 01 Aug 2019 20:51:11 GMT

Dubbie,

The results are quite disappointing, but still understandable given the wide beam width. Sure, you might be able to make it work, but might take quite a bit of effort to do so. Your comment of cat fur got me thinking so I pulled out my IR thermometer and shot a couple of readings. Of course my cat was near by and as long as I let him chase the laser dot, he was game to help me collect some data. My hand ~34C, his body (black or white fur) ~28-30C, while inside his ear is ~36C. I hope this helps.

Good luck with finding a good solution for your project.

Gene

RE: CatDogFoxBot #5 : Collecting Some Temperature Data

DAB — Thu, 01 Aug 2019 19:27:42 GMT

Welcome to the wonderful world of Infrared sensing.

When dealing with IR, you typically need to get quite close to get any accuracy.

If you have much humidity, the water molecules suck up IR like sponges and really cut the transmission significantly.

You might try a focusing lens to setup a fixed detection distance.

DAB