PERSY
PERSY: Indoor/outdoor reference trajectory at the foot
PERSY (Pedestrian Reference System) is a benchmark device for indoor and outdoor pedestrian geolocation. Attached to the foot, it works by combining all satellite, inertial, and magnetic signals using a strapdown mechanism. The sensors are more powerful and the correction calculations more accurate, made possible in particular by the interpretation of walking biomechanics.
Components and characteristics
PERSY is small and light (< 200 g) and is composed of:
- STIM300 (Sensonor), sampling frequency 160 Hz :
- Triaxial accelerometer
- Triaxial gyroscope
- HMC5983 (Honeywell), sampling frequency 160 Hz :
- Triaxial magnetometer
- NEO-M8T (Ublox)
- GNSS receiver: single-frequency, dual-constellation (5 Hz)
- SD card
- Battery (life: 4 hours)