Week 4 Summary
Navshoe is new kind of tracking technology that is used to track motion of a user in the real world. The basic design is small device with various sensors is placed in the shoe of the user. The device is GPS capable but by now means requires GPS to function. It combines a few different sensors together being a gyro, accelerometer and an inertia senors. Unlike a pedometer the device actually tracks the displacement of the user in three dimensions. It is meant for indoors and outdoors. The device uses Kalman filtering to reduce the noise coming from the sensors.
To improve accuracy, uses data from all available sensors to reduce the noise level in it’s calculation. Even GPS isn’t perfect but the system can recognize sudden GPS jumps by comparing the GPS data to that of the other part of the device. GPS is used to reduce the error in the system by occasionally providing landmarks. The NavShoe does occasionally give bad readings. To combat long term error the devices uses pauses in movement of the users foot to fix the location elimanting the long term build up error instead allowing small amount that build liner of over great distances.
Overall I think it;s an interesting idea. Even more so when combined combined with an existing system such as a HMD or some kind of vision system.
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