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. 04, 1987
Filed:
May. 03, 1984
Yukiji Morita, Tokyo, JP;
Masafumi Yoshida, Tokyo, JP;
Kaijo Denki Co., Ltd., , JP;
Abstract
In apparatus for measuring the propagation time of ultrasonic waves by counting the number of clock pulses occurring within the period of time from the transmission of an ultrasonic pulse to the receiving of the pulse, a receiving circuit receives a transmitted pulse and a received pulse and provides an output which continues from transmission until reception of the pulse. A time-difference detection circuit detects pulses occurring during a time interval t.sub.1 starting at the leading edge of the transmission pulse and ending at the leading edge of the first clock pulse thereafter and a time interval t.sub.2 starting at the leading edge of the received pulse and ending at the leading edge of the first clock pulse thereafter. The duration of the time interval t between transmission and reception is determined in accordance with the equation