{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9816975","patent":{"patent_number":"US-9816975","title":"Fluid state detection apparatus","assignee":null,"inventors":[],"filing_date":"2016-04-05T00:00:00.000Z","publication_date":"2017-11-14T00:00:00.000Z","cpc_codes":["G01N","G01N"],"num_claims":4,"abstract":"A fluid state detection apparatus which can detect a short failure in which a constituent Wheatstone bridge circuit is shorted to a power supply. A combustible gas detection apparatus (1) judges that a short failure has occurred in a constant temperature control circuit (231) (S240) when a top potential V21 is equal to or greater than a first judgment value Vth1 and a difference D1 (=V11−V31) is equal to or greater than a second judgment value Vth2. As a result, apparatus (1) can distinguish “a state in which a bridge circuit (210) is shorted to a DC power supply (40) (where the constant temperature control circuit 231 is in a short failure state)” from “a state in which the resistance of the heat generation resistor (15) deceases due to a combustible gas (hydrogen)” based on the top potential V21 and the difference D1. "},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Fluid state detection apparatus","description":"A fluid state detection apparatus which can detect a short failure in which a constituent Wheatstone bridge circuit is shorted to a power supply. A combustible gas detection apparatus (1) judges that ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9816975","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-9816975","citation_suggestion":"Patentable. \"Fluid state detection apparatus\" (US-9816975). https://patentable.app/patents/US-9816975","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9816975","json":"https://patentable.app/api/llm-context/US-9816975","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:21:26.971Z"}