Geolocation of travelers

ULISS : A smart device for research on indoor/outdoor positioning and navigation methods

ULISS (Ubiquitous Localization with Inertial Sensors and Satellites) is a lightweight handheld device dedicated to research on geolocalisation solutions for travelers.

It records signals from several sensors, i.e. inertial/magnetic sensors and GNSS receiver, in all environmental and experimental conditions, both indoors and outdoors. ULISS supports the development and improvement of novel ubiquitous geolocalisation algorithms based on the signals commonlly recorded by smart connected objects.

Components and characteristics

ULISS is small and light (< 200 g) and is composed of:

Multi-constellation and multi-frequency GNSS receiver u-blox F9P
Inertial unit Xsens Mti7, sampling frequency 200 Hz :
- Triaxial accelerometer
- Triaxial gyroscope
- Triaxial magnetometer
- Pressure
- Temperature
SD card
Battery
Onboard computing unit

AWINDA

The Xsens/Awinda system is a motion capture system.

Awinda is the name of the patented wireless radio protocol used by Xsens to transmit data from its motion sensors without cables.

The associated product, MTw Awinda, is a 3D inertial-magnetic tracker.

Components and characteristics

Sensors (MTw trackers): each MTw unit is a complete inertial magnetic unit (IMU) containing:
- a 3-axis accelerometer
- a 3-axis gyroscope
- a 3-axis magnetometer
- a barometer
- an internal temperature sensor (thermistor) — used to compensate for the effects of temperature on the other sensors.
Internal battery: a rechargeable LiPo battery. Depending on the version: typical battery life of approximately 6 hours in continuous use
Receiver unit/base station (Awinda Station):
An “Awinda Station” — complete base: it receives data from several MTw units, synchronizes the signals, and powers/charges the sensors.

PERSY : Indoor/outdoor pedestrians's reference trajectory

PERSY (Pedestrian Reference System) aims at computing reference trajectories of indoor/outdoor pedestrians’ foothpaths. It is rigidly attached to the foot and hybridizes all signals from the multi-sensors platform with a “strapdown” mechanization. The signals are GNSS raw data, inertial and magnetic measurements. The sensors are of higher grade and the fusion process integrates more accurate state vector estimation assisted by biomechanical gait features.

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)