{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9651411","patent":{"patent_number":"US-9651411","title":"Electromagnetic flowmeter and self-diagnosing method of exciting circuit unit thereof","assignee":null,"inventors":[],"filing_date":"2012-12-21T00:00:00.000Z","publication_date":"2017-05-16T00:00:00.000Z","cpc_codes":["G06F"],"num_claims":3,"abstract":"An electromagnetic flowmeter using a square wave excitation method includes a differential amplifier which outputs a detection signal; an analog-digital converter which converts the detection signal into a digital detection signal; a timing control circuit which generates a sampling signal for sampling the digital detection signal; an calculation unit which executes a flow rate calculation process and a abnormality judging process at a same time. The flow rate calculation process acquires a flow velocity output signal by sampling the digital detection signal in a flat portion in a positive/negative excitation section. The abnormality judging process acquires a differential output signal by sampling the digital detection signal in a rising/falling portion in the positive/negative excitation section, and obtains a differential noise from the flow velocity output signal and a differential output signal, and judges abnormality of the exciting current by comparing a differential noise with a detection threshold level."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Electromagnetic flowmeter and self-diagnosing method of exciting circuit unit thereof","description":"An electromagnetic flowmeter using a square wave excitation method includes a differential amplifier which outputs a detection signal; an analog-digital converter which converts the detection signal i","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9651411","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-9651411","citation_suggestion":"Patentable. \"Electromagnetic flowmeter and self-diagnosing method of exciting circuit unit thereof\" (US-9651411). https://patentable.app/patents/US-9651411","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9651411","json":"https://patentable.app/api/llm-context/US-9651411","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T04:32:29.201Z"}