Influx devices combine Global Navigation Satellite System (GNSS) and dead reckoning for optimal navigation and location accuracy. While GNSS provides precise positioning under ideal conditions, its signal can be weakened or lost in certain environments like tunnels, urban canyons, or dense forests.b This is where dead reckoning steps in.
Using accurately aligned IMU configuration, these devices help detect and plot navigation routes and patterns in areas such as tunnels, underground parking, subways, or any area with minimum GNSS coverage.
Dead reckoning continuously estimates your position based on your device's movement data, such as speed and direction. When GNSS signals are unavailable, dead reckoning takes over, ensuring uninterrupted navigation until the GNSS connection is restored.
Align the IMU of the device to obtain the correct measurements, as shown below:
Place the device into the vehicle so that the IMU chip inside is aligned with the axis,
In case of misalignment, align the 'Z' axis first, followed by 'Y' and then 'X'. The chart below explains the attributes of all three axes in detail:
To Calculate the exact angle in case of misalignment:
Keep the axis's actual position in mind- measure the angle of misalignment.
Subtract the current measured angle from the actual angle value.
For example, if the vehicle's attitude is misaligned at its roll, the axes Z and Y are misaligned.
Configure/edit in Xml
Similarly, if the vehicle's attitude is misaligned at its yaw, the axes X and Y are misaligned.
Similarly, if the vehicle's attitude is misaligned at its pitch, the axes Z and X are misaligned.
Axis
Angle
Movement Orientation
Pointing Direction
Default
Z
0°, 360°
Distance (or depth) from the observer
Vertical
0
Y
-90°, 90°
Vertical movement
Lateral
0
X
-180°, 180°
Horizontal movement
Longitudinal
0
This allows users to define the desired sampling rate in Hz, the maximum being 30Hz.
This lists the various dynamics models/environments supported for a well-defined configuration:
Portable
Stationary (Static- no movement)
Pedestrian
Automotive
Sea
Airbourne up to 1g/2g/4g
Wrist
Motorbike
Robotic Lawn Mower
Electric Kick Scooter
The GNSS module used in Influx Technology's ReXgen Air device supports receiving and tracking from various Global Navigation Satellite Systems. ReXgen Air device Supports the following GNSS(s)'
BeiDou: China
IMES: Indoor Messaging System, Japan
Galileo: European Union
GLONASS: Russia
GPS: United States
QZSS: Japan (Regional)
SBAS: Satellite-Based Augmentation System
The device consists of an internal GNSS module and an external active antenna with a supply voltage of 3V. This receiver can evaluate signals from the GNSS/QZSS, GLONASS, BeiDou and Galileo satellites. GNNS data can be logged at sampling rates up to 30HZ.
The GNSS orientation requirements for installing ReXgen Air devices majorly focus on explaining orientations for:
For a step-by-step guide, click here.
Using the Geofencing option, one can define up to one circular geofencing area, creating a circular area or fence around the location of interest.
Radius: specify the radius to adjust the location's proximity in meters.
Latitude: specify the latitudinal location.
Longitude: specify the longitudinal location.
The module draws a circle using the values specified for the Longitude, Latitude and radius.
Or
How tousing ReXdesk.
Value
Output
0
Unknown (insufficient satellites for detection)
1
Inside the Geofencing Parameter
2
Outside the Geofencing Parameter