Help Please Omnidirectional wireless distance limiting(No ultrasound or IR)
First off hi, I'm new to the boards. I'm trying to wrap my head around what I thought would be a relatively simple project but can't seem to find a viable solution. Here are the details lets see what you guys can come up with.
An object needs to remain with a certain distance of a fixed point. If it travels beyond this distance an alarm is to be triggered.
The range is up to 30m and needs to be controllable down to 1m.
This will be outdoors, in open space but not "controllable space" IE no overhead cameras.
Both transmitter and receiver need to be omnidirectional as they may not always be facing each other.
Ultrasound cannot be used.
The circuitry on the moving object needs to be < 8in3 or so in size. The smaller the better.
Circuitry on the fixed point can be larger but preferably not much.
I was thinking of using RSSI to do it and just have the "alarm range" adjusted as the situation required. The distance is too low to reliably use RF pings as distance I think and ultrasound is out due to not being omnidirectional. Hope you guys can help.
First off hi, I'm new to the boards. I'm trying to wrap my head around what I thought would be a relatively simple project but can't seem to find a viable solution. Here are the details lets see what you guys can come up with.
An object needs to remain with a certain distance of a fixed point. If it travels beyond this distance an alarm is to be triggered.
The range is up to 30m and needs to be controllable down to 1m.
This will be outdoors, in open space but not "controllable space" IE no overhead cameras.
Both transmitter and receiver need to be omnidirectional as they may not always be facing each other.
Ultrasound cannot be used.
The circuitry on the moving object needs to be < 8in3 or so in size. The smaller the better.
Circuitry on the fixed point can be larger but preferably not much.
I was thinking of using RSSI to do it and just have the "alarm range" adjusted as the situation required. The distance is too low to reliably use RF pings as distance I think and ultrasound is out due to not being omnidirectional. Hope you guys can help.
Last edited: