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:
Jul. 07, 2026
Filed:
Feb. 14, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Fumio Yuki, Hitachinaka, JP;
Takeo Hosokawa, Hitachinaka, JP;
Atsuo Soma, Hitachinaka, JP;
Tatsuhiko Monji, Hitachinaka, JP;
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Abstract
Provided is a road surface type detection device capable of distinguishing an asphalt reference road surface type from other road surface types in real time from comparison of magnitudes and frequencies of strain sensor signal waveforms that are excellent for information detection in a low-speed range. A road surface type detection devicethat estimates a plurality of road surface types (asphalt, a gravel road, a grass road) includes at least one sensor elementthat detects a physical amount of a vehicle, a road surface type estimation unit, and a storage unitthat stores output values of the sensor elementcorresponding to the plurality of road surface types. Any one road surface type asphalt, a gravel road, a grass road) is estimated out of the plurality of road surface types on the basis of a magnitude of a waveform of a sensor signal output by the sensor element. It is thus possible to distinguish asphalt from other road surface types in real time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile