Apparatus for broadcasting a warning signal
First Claim
Patent Images
1. Vehicle mounted apparatus for broadcasting a warning signal on a radio channel to thereby warn of the vehicle'"'"'s approach, the apparatus comprising:
- a transmitter for broadcasting a warning signal on a radio channel;
a receiver for receiving and measuring a signal strength of a normal signal of said radio channel; and
a controller for controlling a strength of the broadcast warning signal based on the measured signal strength of the normal signal of said radio channel to thereby control a broadcast range of said warning signal, wherein said receiver stores said signal strength in said memory, and wherein said controller controls the strength of the warning signal on the basis of the signal strength currently stored in said memory.
1 Assignment
0 Petitions
Accused Products
Abstract
There is disclosed vehicle mounted apparatus for broadcasting a warning signal on a radio channel to thereby warn of the vehicle'"'"'s approach. The apparatus includes a transmitter for broadcasting a warning signal on a radio channel, and a controller for controlling the strength of the broadcast warning signal on the basis of a signal strength of a normal signal on the radio channel to thereby control a broadcast range of the warning signal.
20 Citations
12 Claims
-
1. Vehicle mounted apparatus for broadcasting a warning signal on a radio channel to thereby warn of the vehicle'"'"'s approach, the apparatus comprising:
-
a transmitter for broadcasting a warning signal on a radio channel; a receiver for receiving and measuring a signal strength of a normal signal of said radio channel; and a controller for controlling a strength of the broadcast warning signal based on the measured signal strength of the normal signal of said radio channel to thereby control a broadcast range of said warning signal, wherein said receiver stores said signal strength in said memory, and wherein said controller controls the strength of the warning signal on the basis of the signal strength currently stored in said memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of broadcasting a warning signal comprising:
-
receiving and measuring a signal strength of a normal signal of a radio channel; broadcasting a warning signal on said radio channel using a transmitter; controlling a strength of the warning signal based on the measured signal strength of the normal signal of said radio channel to thereby control a broadcast range of said warning signal, and storing said measured signal strength in a memory and controlling the strength of the warning signal based on the currently stored signal strength. - View Dependent Claims (12)
-
Specification