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:
Oct. 14, 2025
Filed:
Sep. 16, 2021
Denso Corporation, Kariya, JP;
Mitsuyasu Matsuura, Nisshin, JP;
Taketo Harada, Nisshin, JP;
Tetsuya Aoyama, Kariya, JP;
Yu Koyama, Kariya, JP;
Takuya Nomura, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An ultrasonic sensor (), that transmits probe waves which are ultrasonic waves and acquires detection waves including reflected waves which have been reflected from surrounding objects, includes a transmitter/receiver () that transmits the probe waves and acquires the detection waves, a detection wave processing section () that executes processing for passing a predetermined frequency band which includes the frequency of the probe waves, an amplitude measurement section () which measures the amplitude of the detection waves, and a judgement section () which judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following the termination of transmitting the probe waves.