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:
Nov. 13, 1984
Filed:
Nov. 13, 1981
Tadashi Tsuda, Nagoya, JP;
Seiichiro Hiramatsu, Oobu, JP;
Tsuyoshi Maeno, Chiryu, JP;
Mitsugi Ohtsuka, Chiryu, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A device for detecting failure of an ultrasonic apparatus having an ultrasonic pulse generator, an ultrasonic transmitter and an ultrasonic receiver utilizes a damped oscillation signal which is produced at the junction point between the ultrasonic pulse generator and the ultrasonic transmitter when the ultrasonic transmitter or the ultrasonic receiver is excited by applying thereto an ultrasonic pulse generated by the ultrasonic pulse generator. A level discriminator compares the damped oscillation signal with a reference level and determines whether the damped oscillation signal has a sufficient magnitude and duration indicating that the ultrasonic transmitter or the ultrasonic receiver is in a normal operating condition.