Kabushikikaisha Kenwood

Yoshinori Morimoto

Yukihiko Miyamoto

A transponder is selectively mounted on a vehicle. The transponder receives its operation energy through magnetic coupling with the loop coil when the vehicle comes over the loop coil, and transmits predetermined information specific to the vehicle to the vehicle detection circuit. The vehicle detection circuit time divisional performs a supply of the operation energy to the transponder and a reception of the information from the transponder, detects a presence of a vehicle in accordance with a change in the output from the loop coil, and judges from the information received from the transponder whether the detected vehicle is a predetermined vehicle.

Growing community of inventors

Ebina, Japan

Yoshinori Morimoto