公开(公告)号：US20200098257A1

公开(公告)日：2020-03-26

申请号：US16577787

申请日：2019-09-20

Applicant: Q-Free ASA

Inventor： Ola Martin Lykkja ,  Knut Inge Evensen

IPC: G08G1/0967 ,  E01F9/654 ,  E01F9/608 ,  E01F9/646

Abstract: A system including a plurality of warning devices (100) each with a radio transmitter (111) and a positioning system (109). Each warning device is arranged to communicate with at least one other of the warning devices so that at least one of the plurality of warning devices can determine the mutual positions of the plurality of warning devices, determine a pattern from the mutual positions and transmit a specific message corresponding to the pattern.

公开(公告)号：US10997856B2

公开(公告)日：2021-05-04

申请号：US16577787

申请日：2019-09-20

Applicant: Q-Free ASA

Inventor： Ola Martin Lykkja ,  Knut Inge Evensen

IPC: G08G1/0967 ,  E01F9/608 ,  E01F9/646 ,  E01F9/654 ,  H04W4/44 ,  H04W84/20

Abstract: A system including a plurality of warning devices (100) each with a radio transmitter (111) and a positioning system (109). Each warning device is arranged to communicate with at least one other of the warning devices so that at least one of the plurality of warning devices can determine the mutual positions of the plurality of warning devices, determine a pattern from the mutual positions and transmit a specific message corresponding to the pattern.