Patent ID: 8994557
Filing Date: 2015-03-31
Classification: G08G,H01Q

Abstract:
1. A collision warning apparatus comprising a positioning receiver for a radio based positioning system, said positioning receiver comprising a first antenna and first analog and first digital circuitry, a radio transceiver for sending and receiving radio messages to/from other collision warning apparatus, said radio transceiver comprising a second antenna, and second analog and second digital circuitry, an operator information unit for issuing collision warnings, a control unit processing data from said positioning receiver and said radio transceiver for generating said collision warnings, a roof mount unit for being mounted on a vehicle roof, wherein said first and said second antenna as well as said first and said second analog circuitry are arranged in said roof mount unit, a cabin mount unit for being mounted in a passenger cabin, wherein said operator information unit is arranged in said passenger cabin, a digital transmission line connecting said roof mount unit and said cabin mount unit, wherein said collision warning apparatus has an idle state and an active state, wherein, in said idle state, said collision warning apparatus has a smaller power consumption than in said active state, said collision warning apparatus further comprising an acceleration detector, wherein said control unit is adapted to put said collision warning apparatus into said active state upon detection of an acceleration by said acceleration detector.