RFID locations
Hi I was looking to see afrom some some people's experiences on RFID locations. First off I wanna say I'm in construction so I'm always using my hands. I was hoping to place the new RFID chip from cyberise.me that is smaller and place it in my right hand on the left side instead of the common between thumb and index finger. My reasoning is twofold one is because I'm always grabbing stuff and using a hammer the other is easy of use on a reader.
My other question is in regards to a good second location higher up for Accra through automated doors and sensors for lights that is all the second chip would be used for.
My other question is in regards to a good second location higher up for Accra through automated doors and sensors for lights that is all the second chip would be used for.
Comments
I was thinking near the top of the trapezius (did a Google search) I want it as high up as I can place it so I don't need to make the readers too strong in door jams and such (I'm 6'1" chip will be around 5' up)
@Meanderpaul NFC and RFID dont really care much about orientation, especially the implanted ones since they are cylindrical. and a normal chip ran be read from < 20 cm (according to spec but you never get quite that far) so you have no need to worry about distance much at all.
Everything I read said not to put it near the bone. Is the risk of slashing between bone and a hard object that minimal with it? I know @glims said it would take enough to really mess my hand up. I guess I'm cautious with the one in my hand. I have really no worries with my other spot aside from lacking fattyness in it.
If you calculate the breaking stress of the glass tubing based on schotts published modulus data, it's not quite as impressive as its being made to seem. They are strong enough that one doesn't need to worry much about breaking, with two exceptions: a quick impact or if placed too near bone. The value if one places a tube on a hard surface and applies pressure to the wall of the cylinder according to Schotts reported youngs modulus of 64 MPa is between 8 and 30lbs of pressure. When placed between fingers though, the cylinders moves and have significant cushion from the tissue. A quick blow however could transfer enough energy to break the tubing. Something like a piece of rebar is a worst case scenario. I've never actually heard of anyone having one break despite all the free runners and martial arts folks involved.
Back of the hand is not an advisable location though because it's one of the most likely places to be struck, and because of the proximity to bone. The bone can function like that "flat hard surface." Have you considered the forearm instead?
Rule of thumb is to avoid to joints and surface bones as able. RFIDs are impressively strong but it's still glass.
Valid. Hey, if the glass breaks it's not the end of the world. You'd definitely want to make a small incision and get out as the chip and as much glass as you could. A couple little shards though left under the skin aren't a big deal and would most likely just work their way out. Dude, I'm sure you've had splinters that were larger and more invasive to remove if you're a framer.
So my recommendation is: stay away from the bones. It's not comfy and increases the chances to hit your tag with two hard objects at once. Placing it just under the skin makes removing easier, and reduces the distance to the base station antenna (which can be of advantage)
On a different not I want to just be sure the fatty part near the metacarpal is an OK spot? Safety wise
I'm entertained that I managed to get a question about sudden impacts going with the implant and its durability. @glims please let me know what you find out not just because I had question but now I'm genuinely curious on how the test will go and works.
Base of little finger in the fatty section of the hand on that side.
I'm actually now thinking if you have access to a pig....implant the rfid and have the hammer/tool/ whatever swing at a preset force into the location of said implant. Gradually increase the force till you have the breaking point. I know it's not the most scientific thing out there but hey it may enlighten and give some actual numbers.
I think that the testing glims did are totally valid for implant in the thumb webbing. The tissue will be destroyed before the tag would. This all changes with location though. If smashed between the striking surface and a bone its a different story. Also... rfids are cheap and easy to implant so it's not a big risk. If one breaks than we learn something.