| 摘要 |
PROBLEM TO BE SOLVED: To provide a reduction in electric power consumption and the like for a control device (hands-free entry device for a vehicle) for unlocking a vehicle door automatically and the like after performing the collation and verification of prescribed portable equipment 20 by carrying out a two-way radio communication between main body equipment 10 (on-vehicle equipment) and the portable equipment 20. SOLUTION: In the composition of the control device, the main body equipment 10 collates and judges a certification code included in the answer signal when the equipment 10 sends a request signal intermittently and receives an answer signal for the request signal from the portable equipment 20. The affirmative result of the judgment, for example, allows unlocking control to be ready to be performed after the detection of a door handle operation by a door handle sensor 32 and permits the transmission interval T of the request signal to be set longer than a normal value after the reception of the answer signal (after a lapse of transmission time A). |
