The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2000
Filed:
Nov. 30, 1998
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
While transmitting an electromagnetic wave from a transmitting antenna to, for example, a magnetostrictive resonator, buried in a road, a reception section composed of a reception amplifier and signal processor is inactivated. After stopping transmission of the electromagnetic wave, the reception section is activated and a receiving antenna detects an electromagnetic wave radiated by the magnetostrictive resonator. In this method, a magnetostrictive resonator detection apparatus having a sufficient directivity and detection distance can be presented. The magnetostrictive resonator detection apparatus applying this detecting method is mounted aboard a vehicle, and a plurality of magnetostrictive resonators are buried in the road. By sequentially transmitting and receiving electromagnetic waves at different resonance frequencies thereof, and judging the configuration of the road and the vehicle, a safe traffic system is presented.