US Scientists Have Made "Smart" Radar Shoes.

The popularity of GPS devices has facilitated people's travel. However, in some special signal blind areas, GPS is still difficult. target How to locate accurately and how to solve this problem has always been a research topic in the scientific field. According to the December 1st issue of popular science magazine, American researchers have invented a kind of radar shoe, which can help users locate accurately in the blind area of the signal.

So far, the most commonly used method to locate blind spots in GPS signals is the use of inertial measurement unit (IMU). However, because IMU needs to identify the target according to GPS, and then measure the speed and direction of the target, then new positioning is made. Therefore, a minor mistake in measurement may lead to huge cumulative error. The longer the target loses contact with GPS, the greater the error. IMU will even decide to stop moving target slowly.

In view of this situation, a joint research team of North Carolina State University and Carnegie Mellon university has invented one. Radar shoes This kind of shoe is built with a radar, which can track the distance between the foot and the ground. If the distance is not changed for a long time, the system will decide that the target has stopped moving. information Transmission to IMU. This improvement allows IMU to locate the target more accurately when the target stops moving.

This kind of radar shoes is very useful for underground workers, especially those working in tunnels and large frame structures. It can locate accurately in dangerous situations.