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:
Dec. 15, 1992
Filed:
Dec. 04, 1990
Shinichi Takeuchi, Tokyo, JP;
Ryohei Motegi, Hiratsuka, JP;
Tokimec, Inc., Tokyo, JP;
Abstract
An ultrasonic wave is emitted from an ultrasonic wave transducer for transmission to polymeric materials and received by an ultrasonic wave transducer for reception arranged at a predetermined distance away from the transducer for transmission. A propagation time of the ultrasonic wave and the level of the reception wave are measured during the process to heat or cool the polymeric materials. A state of the polymeric materials is discriminated on the basis of a characteristic curve which is determined by the propagation time and the reception wave level of the ultrasonic wave. In the case of measuring an asphalt paved road, when shoulder characteristics appear on the characteristic curve which is determined by the propagation time of the ultrasonic wave and the reception wave level, it is determined that a solid state in which a traffic lane can be opened was obtained.