User's Manual

Document MV0319P.N

MVN User Manual

5.7 MVN (BIOMECH) Awinda

5.7.1 Wireless Motion Trackers (MTw)

The MTw provides 3D angular velocity using rate gyroscopes, 3D acceleration using accelerometers,

3D earth magnetic field using magnetometers, as well as atmospheric pressure using the barometer.

Combined with Xsens algorithms, 3D drift-free orientation is provided. The MTw is an excellent

measurement unit for orientation measurement of human body segments, in particular because it is also

designed to maintain very high accuracy time synchronization of the individual sensor readout across a

wireless network of multiple units. This is essential when measuring joint angles accurately.

The MTw is powered using a LiPo battery. The battery can be in operation for up to 6 hours, and maintain

a level of charge in stand-by for approximately 90 hours when in sleep mode. It will be fully recharged

after one hour docked in a wall powered Awinda Station. For more technical details on the MTw, sensor

component specifications and orientation performance, see Section 19.13.

On the top of the MTw is an LED which indicates of device

status.

The MTw charges via micro USB connection located on its base.

Next to this is a power button used to power each MTw on and

off.

The back of the MTw displays 2D barcodes used by Xsens for

quality control and tracking, as well as the MTw product code

(MTw2-3A7G6) and serial number

(SN).

On the side of each MTw is a label indicating the pre-defined on

body position.

Velcro attached to the back of the MTw tracker allows easy

fixation to the straps.

Also known as Device ID.