{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9646492","patent":{"patent_number":"US-9646492","title":"Congestion sign detection method, program, and congestion sign detection device","assignee":null,"inventors":[],"filing_date":"2014-03-07T00:00:00.000Z","publication_date":"2017-05-09T00:00:00.000Z","cpc_codes":["G08G","B60W","G08G","G08G","G08G","G08G"],"num_claims":10,"abstract":"A congestion sign detection method that is executed by a congestion sign detection device 10 which includes three-dimensional acceleration sensor 14 that acquires acceleration information in each axis direction of an X axis, a Y axis, and a Z axis forming an orthogonal coordinate system of the three-dimensional space. The method includes: an input data calculation step of calculating an acceleration vector using the acceleration information acquired by the three-dimensional acceleration sensor 14, and calculating a norm of a difference of the vectors at two different timings as input data; a frequency analysis step of calculating an autocorrelation of the input data and calculating a power spectrum by performing a Fourier transform on the autocorrelation; an angle information acquisition step of converting the power spectrum into angle information; and a congestion sign detection step of detecting congestion sign according to the angle information."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Congestion sign detection method, program, and congestion sign detection device","description":"A congestion sign detection method that is executed by a congestion sign detection device 10 which includes three-dimensional acceleration sensor 14 that acquires acceleration information in each axis","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9646492","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-9646492","citation_suggestion":"Patentable. \"Congestion sign detection method, program, and congestion sign detection device\" (US-9646492). https://patentable.app/patents/US-9646492","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9646492","json":"https://patentable.app/api/llm-context/US-9646492","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:17:18.378Z"}