Traffic system to prevent from accidents
AssigneesYokogawa Electric Corporation, Massacusetts Institute of Technology
InventorsMasahito Takagi, Ichiro Masaki
Life of this patent
Estimating the term…
Abstract
An improved traffic accident preventing system to alarm both a driver on vehicle and pedestrian each other using a radio communication unit when they are located close. This system also provides a traffic monitoring and control system using communication between vehicle, pedestrian with communication unit and radio unit equipped by roadside, in which a traffic management center can send information to a specific vehicle and pedestrian with communication unit, and also receive information from them.
Claims13
A communication system for preventing accidents between a pedestrian and a vehicle, said system comprising:
- portable tag means to be carried by said pedestrian for receiving a first signal, and for providing and transmitting a second signal;
- and
- vehicle means to be installed in said vehicle for generating and transmitting said first signal, and for receiving said second signal from said portable tag means only when said pedestrian carrying said portable tag means is close to said vehicle and for not receiving said second signal when said pedestrian is not close to said vehicle, and for producing an alarm when receiving said second signal.
A communication system for preventing accidents between a pedestrian and a vehicle, said system comprising:
- portable means to be carried by said pedestrian for receiving a first signal, and for generating and transmitting a low power second signal, and for producing an alarm only when receiving said first signal;
- vehicle means to be installed in said vehicle for generating and transmitting said first signal of low power, and for receiving said second signal from said portable means only when said pedestrian carrying said portable means is close to said vehicle and for not receiving said second signal when said pedestrian is not close to said vehicle.
Dependencies are inferred from the claim text.