TIME SYNCHRONIZATION ALGORITHM FOR MEASUREMENT SYSTEMS WITH RANDOM DELAYS

摘要

Method and system for synchronisation of measurements from a number of sensor systems functionally connected to a host computer, the method comprising - sending a trigger message MSUB0/SUB to the sensor systems for starting the measurements by the sensor systems and the transmission of the measurements to the host computer, - sending a sequence of following messages MSUBi/SUB (i=l, 2, 3, ..., N) from the host computer to the sensor systems and storing the sending time xSUBi/SUB (i=l, 2, 3, ..., N) for each message MSUBi/SUB (i=l, 2, 3, ..., N) - for each received message MSUBi /SUB(i=l, 2, 3, ..., N) at a sensor system, sending response messages mSUBi/SUB (i=l, 2, 3, ..., N) from the sensor system to the host computer, the response messages mSUBi/SUB (i=l, 2, 3, ..., N) implying information indicative of the receiving times ySUBi/SUB (i=l, 2, 3, ..., N) of the received messages by the sensor system, - storing the receiving time ySUBi/SUB (i=l, 2, 3, ..., N) at the host computer for each received response message mSUBi/SUB (i=l, 2, 3, ..., N) and relating the sending time sequence XSUBi/SUB (i=l, 2, 3, ..., N) to the receiving time sequences ySUBi /SUB(i=l, 2, 3, ..., N) for each sensor system for finding a relative time shift between reception of the trigger message by the different sensor systems.