Widespread popularity of GPS devices to facilitate people's travel, but in some special signal blind area, GPS is still difficult to accurately locate the target and how to solve this problem has been a scientific study. U.S. researchers have invented a radar shoes, which can help blind users accurate positioning in the signal.
So far, the most commonly used GPS positioning signal blind approach is to use the inertial measurement unit (IMU). However, IMU need to target the last GPS location of the target to measure the speed and direction of a new position before, so when even a small measurement errors are likely to result in significant cumulative error, and the target loses contact with GPS time The longer, the error will be larger, IMU or even stop moving the goal will be judged as being slow-moving.
In response, North Carolina State University and Carnegie Mellon University research team invented a joint radar shoes, these shoes built a radar, the radar can be the distance between the foot and the ground for continuous tracking If this distance has not changed a long time, the system will determine the goal has been to stop movement, and this information is transmitted to the IMU. This improvement in the target stops moving so that its more accurate IMU positioning.
The radar shoes for underground workers, especially in tunnels and large frame structure is very useful for people who work, it can be in dangerous conditions for accurate positioning.
No comments:
Post a Comment