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:
Mar. 07, 2006
Filed:
Jan. 15, 2004
Ohmyoung Kwon, Seoul, KR;
Joon Sik Lee, Seoul, KR;
Young Ki Choi, Seoul, KR;
Seungho Park, Seoul, KR;
Won Seok Chung, Seoul, KR;
Ohmyoung Kwon, Seoul, KR;
Joon Sik Lee, Seoul, KR;
Young Ki Choi, Seoul, KR;
Seungho Park, Seoul, KR;
Won Seok Chung, Seoul, KR;
Seoul National University Industry Foundation, Seoul, KR;
Abstract
The present invention relates to a flowmeter suitable for a micro flow sensor. The flowmeter of the present invention comprises a resistive heater to be inserted into a fluid, AC power with a first frequency supplied to the resistive heater to periodically heat the resistive heater, a signal processing unit for detecting a first signal from the resistive heater in relation to a temperature variation of the resistive heater by the AC power, and obtaining a phase lag of the first signal relative to the heat generation in the resistive heater, and an operation unit for calculating a flow rate based on the obtained phage lag. According to the present invention, the flowmeter of the present invention has a wide measurement range and high measurement accuracy with a simple structure.