{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11486702","patent":{"patent_number":"US-11486702","title":"Road surface condition determination method and road surface condition determination apparatus","assignee":null,"inventors":[],"filing_date":"2018-04-26T00:00:00.000Z","publication_date":"2022-11-01T00:00:00.000Z","cpc_codes":["B60W","G01W","B60W"],"num_claims":6,"abstract":"A method of determining a road surface condition includes: acquiring, when determining a condition of a road surface being in contact with a tire from a time-varying waveform of vibration of the running tire, the time-varying waveform of vibration having been detected by a vibration detecting means, a plurality of intrinsic vibration modes, from data of the time-varying waveform of vibration of the tire, using an algorithm of empirical mode decomposition; selecting an arbitrary intrinsic vibration mode from the plurality of intrinsic vibration modes; calculating a statistic amount from the distribution of feature data calculated by performing Hilbert transform on the selected intrinsic vibration mode to set the statistic amount as a feature amount; and determining the road surface condition from the feature amount and a feature amount obtained in advance for each road surface condition."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Road surface condition determination method and road surface condition determination apparatus","description":"A method of determining a road surface condition includes: acquiring, when determining a condition of a road surface being in contact with a tire from a time-varying waveform of vibration of the runni","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11486702","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11486702","citation_suggestion":"Patentable. \"Road surface condition determination method and road surface condition determination apparatus\" (US-11486702). https://patentable.app/patents/US-11486702","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11486702","json":"https://patentable.app/api/llm-context/US-11486702","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T20:31:25.144Z"}