Nancy Young said:I drink seltzer by the bucket, I buy 12 packs, I can
usually handle 4 at a time. I put three on the bottom
of the cart and keep one up top to scan. I just say,
I have 4 of these and they deal with it.
Twice over all this time, the cashier has alarmedly said,
Do you have something on the bottom of your cart???
Yes, three more of these. Oh, whew, and I'll see this
light flashing right near the edge closest to the cart.
Check cart bottom! Check cart bottom!, something like
that.
Two questions come up, why does it only rarely notice I
have stuff down there and how the heck can it tell? With all
the legs and carts going by, a detector would be going off all
the time.
Perhaps the eye in the sky is spying on the customers?
nancy the nosy
I do this kind of stuff for a living...
Let's say all carts are the same, and everyone, by default, stands at
roughly the same place in front of the cashier station. The cashier is
going to know that when a certain part of the cart (let's say, the
thing you push) reaches a certain point (that chip some moron clipped
out of the conveyor bed when they dropped an exceptionally hefty and
hard watermelon).
Let's say a photoeye, or two, or three, or an array cross the checkout
lane at the bottom of the shopping cart. Let's say those photocells
are wired 120v with a normally open relay at the end. Break the beam
on the photoeye, break the 120v circuit, which closes the relay to a
light on the cart side of the conveyor bed, causing "check under cart"
to illuminate.
It's really inexpensive, easy to maintain, chimps can install it, and
ll you need to do is train your checkout girl to know when to look (so
she doesn't have to know where).
Cheers.