How to track a person’s position in a building? I have an idea, but I'm not sure of its reality.
Provided that the wifi nodes are installed in known positions around the building, one could trilaterate the position of the person. Since the distance between the nodes is already known, such things as a Wi-Fi signal passing through different objects can be compensated. Every few seconds, the test will work by comparing what the signal strength from node to node should be. If the signal level changes from the expected, then we can expect that the signal will pass through another material. These tests would give consistent “weight”, which would then be used in a tripartite agreement.
I also tried to find speed sensors, but without such luck. Accelerometers work, but what if the object you want to track travels at a constant speed? Wouldn't accelerometers read 0?
GPS does not provide anywhere near the accuracy I need.
These are all assumptions, and I don’t yet know the math behind her.
Ultimately, this will be the creation of a system that tracks firefighters or other lifeguards in the building. Schemes of the building will be stored on a computer, and their positions will be displayed on the frame of the building frame. Allowing other parties to find them in the event of a trap.
Buildings of flame, oddly enough, provide very little light. In some situations, you cannot see your hand in the face. Because of this, sensors that rely on optics will probably not work so well.
Android, . .
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http://kootenpv.imtqy.com/2016-09-19-predict-where-you-are-indoors