The oil pressure dropped in my car because of hole in the oil pan the motor then shut off and will not turn over.is there a sensor that shuts it off or is it possible it locked up

I have to ask if you are sure the oil pressure drops first, or the engine stops first. The engine would stop if the oil pressure dropped below 5psi but only because the fuel pump would shut off. And it should start back up if that were the reason.
If something such as a relay or the ignition module is getting hot and killing the engine, it might have to cool down before it restarts. And the engine would stop then the oil pressure would drop to zero.

IT sounds like the oil safety system worked on your engine by shutting it down as soon as there was insufficient oil to maintain lubrication . Provided that you did not run the engine past this point I would be fairly sure that no engine damage has occurred . All you should need to do is to replace the sump ( do not bother trying to repair as it is a hopeless exercise), Check for oil pump pick up damage ( bent /cracked broken at fittings)

If the gauge is showing zero pressure, you would next check the pressure with a mechanical gauge to verify.
Make sure you use a tee fitting to keep the electric sensor in use while testing.
If the pressure really is zero, something has happened to the oil pump in the oil pan.

oil pumps are located in the oil pan area by dropping the oil [pan this shouls access the pump when you get the oil pump the parts outlet will bring up a diagram of your system get a copy

Sounds like the rear main oil seal on your motor is leaking. In order for it to be replaced, the transmission has to be removed. Not an easy task for the backyard mechanic.

If you drove very far with no oil, it will have done damage to the engine bearings. Try turning the engine over by hand using a socket and bar on the bolt in the center of the big pulley on the bottom of the motor. Go clockwise. If you meet alot of resistance or wont turn at all, time for a rebuild. If it turns freely, try a new oil pan and oil and crank it over. If you hear alot of racket from motor, time for a rebuild. If it starts up and runs, you may have gotten lucky. I dont believe there is an auto shutdown detection as such, usually, if you lose oil pressure, you lose vaccuum, and that can stall the motor out, saving your engine.......Mike

It sounds like oil pressure switch is bad. You said you changed? To clarify, your oil pressure switch is also a safety item that shuts down ignition when oil pressure drops. Try an oil pressure gauge (hand held) to relieve your nerves about engine seizure. Make sure you're not getting to much fuel in engine also, that will dilute oil to a thin viscosity and show low oil press.

It should have the fuel pump tied into the oil pressure circuit in series. I believe once the oil pressure drops below 15 psi the fuel pump shuts off.

A failing oil pressure sensor may be to blame, need to verify the pressure is actually falling to zero with a mechanical gauge. If the pressure on the mechanical gauge does not drop to zero under the same conditions then suspect the pressure sensor. If it is then
I would suspect the oil pump pick up screen is becoming clogged with debris. As mileage accumulates sludge can accumulate in the engine, as bits of it come loose they settle in the oil pan. Extended driving allows it to collect in the pick up screen until it is restricted, upon shutting the engine down the particles drift back to the bottom of the pan. There is also a more remote possiblilty of the bypass valve in the oil pump itself being the culprit, but I think the chance is fairly remote.
Good hunting

Drop the oil pan and clean out the oil pick-up screen.