User's Manual

User Manual
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LP9505-UM-001 Rev A HUSQVARNA CONSTRUCTION - User Manual MDS System description-2 2020-02-10 2 (4)
1 Overview
The MDS system is a radio based system for the measuring of distance from a user to a
moving machine. The system consists of three devices, one MDS-anchor mounted inside
a remote control unit and two MDS-tags placed within the front and rear of a machine.
The MDS system enables the distance to be measured between both of the two MDS-
tags in the machine and the MDS-anchor in the remote control unit.
MDS is an acronym for Machine Distance Sensor.
All MDS devices are identical in terms of electronic hardware and software with the
exception of anchor and tag setting which define the role of the individual devices in the
MDS system.
2 Operating description
The MDS system uses Ultra-Wide Band (UWB) radio technology to measure ToF (Time
of Flight). The system converts this time into distance with a high degree of accuracy.
MDS distance data is used for perimeter fencing around dangerous machines as seen in
picture below. Safe perimeter used is minimum 2m. If the remote control is within 2m from
the machine, the ECU (main computer inside the machine) will stop the machine for
operator safety. The ECU is continuously receiving distance data from MDS-tag via CAN
bus
Figure 1: Real life setup. The MDS system enables measurement of distances at a rate of
2Hz with +/-10cm accuracy. The system has a range of 30m line of sight.