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1.
公开(公告)号:US20050044950A1
公开(公告)日:2005-03-03
申请号:US10758780
申请日:2004-01-15
申请人: Ohmyoung Kwon , Joon Lee , Young Choi , Seungho Park , Won Chung
发明人: Ohmyoung Kwon , Joon Lee , Young Choi , Seungho Park , Won Chung
CPC分类号: G01F1/6986 , G01F1/69 , G01F1/696
摘要: 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.
摘要翻译: 本发明涉及一种适用于微流量传感器的流量计。 本发明的流量计包括插入流体的电阻加热器,提供给电阻加热器的第一频率的交流电力,以周期性地加热电阻加热器;信号处理单元,用于检测来自电阻加热器的第一信号 通过AC电力对电阻加热器的温度变化,并获得相对于电阻加热器中的发热的第一信号的相位滞后,以及用于基于获得的噬菌粒滞后计算流量的运算单元。 根据本发明,本发明的流量计具有宽的测量范围和高的测量精度,结构简单。
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2.
公开(公告)号:US07007549B2
公开(公告)日:2006-03-07
申请号:US10758780
申请日:2004-01-15
申请人: Ohmyoung Kwon , Joon Sik Lee , Young Ki Choi , Seungho Park , Won Seok Chung
发明人: Ohmyoung Kwon , Joon Sik Lee , Young Ki Choi , Seungho Park , Won Seok Chung
IPC分类号: G01F1/68
CPC分类号: G01F1/6986 , G01F1/69 , G01F1/696
摘要: 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.
摘要翻译: 本发明涉及一种适用于微流量传感器的流量计。 本发明的流量计包括插入流体的电阻加热器,提供给电阻加热器的第一频率的交流电力,以周期性地加热电阻加热器;信号处理单元,用于检测来自电阻加热器的第一信号 通过AC电力对电阻加热器的温度变化,并获得相对于电阻加热器中的发热的第一信号的相位滞后,以及用于基于获得的噬菌粒滞后计算流量的运算单元。 根据本发明,本发明的流量计具有宽的测量范围和高的测量精度,结构简单。
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3.
公开(公告)号:US07105358B2
公开(公告)日:2006-09-12
申请号:US10076838
申请日:2002-02-13
申请人: Arunaya Majumdar , Thomas Michael Perazzo , Minyao Mao , Ohmyoung Kwon , Yang Zhao , Guanghua Wu
发明人: Arunaya Majumdar , Thomas Michael Perazzo , Minyao Mao , Ohmyoung Kwon , Yang Zhao , Guanghua Wu
IPC分类号: G01N33/543
CPC分类号: G01L5/0047 , B82Y30/00 , G01L1/24 , Y10S436/805 , Y10S436/806
摘要: An apparatus to measure micro-forces includes a cantilever palette with a set of cantilever array blocks. Each cantilever array block includes a set of cantilevers, with each cantilever including a set of cantilever fingers surrounded by a frame with frame fingers. The cantilever fingers and the frame fingers form a diffraction grating. Each cantilever array block is configured to be responsive to a predetermined micro-force, such that cantilevers of the cantilever array block deflect in the presence of the predetermined micro-force, which causes the diffraction grating to diffract light and thereby provide a visual indication of the presence of the predetermined micro-force.
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