The popularity of GPS systems makes human travel more and more convenient, however, in some blind areas, GPS systems are difficult to accurately locate the target. This is always a problem in scientific research.
Image for illustrative purposes. (Internet source)
Historically, the science of inertial measurement (IMU) has been used to position the blind area of the GPS signal.
However, the IMU only locates the next location after determining the speed and direction of the final goal by the GPS system.
Therefore, as the longer the goal of communication with the GPS system, the greater the uncertainty of the IMU's positioning, even the IMU can position the target immobilized as a moving target.
To solve this problem, scientists from the University of North Carolina and Carnegie Mellon University in the US invented radar shoes that could help users accurately position the blind area.
Radar is a system consisting of a shoe with radar equipment attached.
Radar equipment ensures communication within a certain distance between the user's feet and the ground. When this distance has not changed for a long time, the radar shoe system will judge the target that has stopped mobilizing and transmitting information about the IMU.
This change allows the IMU to more accurately position targets to stop movement.
Radar shoes are very useful for underground workers, especially those who work in tunnels and large structures. Radar shoes can also be positioned correctly in dangerous situations.