Transmit power control for automotive radar system
First Claim
1. In a vehicle having a radar system for detecting a possible collision, the method of radar power control comprising the steps of:
- energizing the radar system to transmit and receive radar signals;
sensing a vehicle speed signal;
determining from the speed signal when the vehicle is stationary for a prescribed period; and
terminating radar transmission power when the vehicle is stationary for the prescribed period.
2 Assignments
0 Petitions
Accused Products
Abstract
A radar system for detecting hazardous objects has a transceiver including a transmitting antenna for transmitting microwave power. For a side detection system, power transmission is available when the vehicle is moving forward. A signal processor receives a pulsed vehicle speed signal and a reverse signal and is programmed to terminate transmission when no speed pulse is received for a preset time or when the reverse signal is present. The transmission is terminated by removing power from the transceiver or by rerouting the microwave power from the antenna to an internal calibration circuit. Radar transmission is re-enabled when the vehicle begins to move forward again. For a rear detection system, radar transmissions are enabled when the reverse signal is present.
-
Citations
13 Claims
-
1. In a vehicle having a radar system for detecting a possible collision, the method of radar power control comprising the steps of:
-
energizing the radar system to transmit and receive radar signals; sensing a vehicle speed signal; determining from the speed signal when the vehicle is stationary for a prescribed period; and terminating radar transmission power when the vehicle is stationary for the prescribed period. - View Dependent Claims (2, 3, 4, 5)
-
-
6. In a vehicle having a speed signal generator, an automotive radar system for sensing nearby objects wherein radar transmission is disabled when the vehicle is stopped comprising:
-
a transceiver for transmitting and receiving radar signals; a circuit coupled to the transceiver for enabling and disabling radar transmission; a signal processor coupled to the circuit for controlling the enabling and disabling of transmission; the signal processor being coupled to a vehicle speed signal and having control means for detecting stoppage of the vehicle and for disabling transmission of signals after a prescribed period of vehicle stoppage. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
-
Specification