Title:
ELECTROMECHANICAL RESONATOR, ITS DETECTION DEVICE AND TRAFFIC SYSTEM
Document Type and Number:
Japanese Patent JP3282569
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To permit automatic driving of a vehicle by winding a coil around a magnetic distortion material, connecting a capacitor on both ends of the coil and generating LC resonance matched with the mechanical resonance frequency of the magnetic distortion material.
SOLUTION: A thin magnetic distortion material 1 made of expanded amorphous metal is stored in an intermediate storage body 2 to which a coil 3 is wound, and a capacitor 4 is connected to both ends of the coil 3 thus an LC resonance circuit to generate LS resonance matched with the mechanical resonance frequency of the magnetic distortion material 1 is constituted. The magnetic distortion material 1 is fixed using ultrasonic melting so that it is protected by a storage body 5 constituted of an airtight resin material with a cover 6. Even if a call electromagnetic wave is removed, the magnetic distortion material 1 is excited from a nearby part. Thus, strong mechanical resonance can be maintained for short time.
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Inventors:
Yoshihiko Tanji
Toshihiro Yoshioka
Toshihiro Yoshioka
Application Number:
JP32743797A
Publication Date:
May 13, 2002
Filing Date:
November 28, 1997
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G08G1/042; G01S13/75; G01S13/76; G01S13/79; (IPC1-7): G08G1/042
Domestic Patent References:
| JP62115385A | ||||
| JP7167949A | ||||
| JP11120280A |
Other References:
【文献】国際公開93/14478(WO,A1)
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)