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    • 3. 发明授权
    • Leak detector of liquid in tank
    • 液体液体泄漏检测器
    • US07334455B2
    • 2008-02-26
    • US10577543
    • 2004-08-30
    • Kiyotaka YanagiAtsushi KoikeToshimi NakamuraKiyoshi YamagishiHideshi Sekimori
    • Kiyotaka YanagiAtsushi KoikeToshimi NakamuraKiyoshi YamagishiHideshi Sekimori
    • G01M3/04
    • G01M3/3254G01M3/002G01M3/3245
    • A leak detector comprising a sensor unit including a measuring slim-tube (13b) via the lower end of which a liquid in a tank is led in/out, a measuring tube (17) connected to the upper end thereof and having a sectional area larger than that thereof, and temperature sensors (133, 134) and a heater (135) provided to the slim-tube (13b), and a leak detection control unit (15a) connected to the sensor unit. The leak detection control unit (15a) has a pulse voltage generating circuit for applying a single pulse voltage to the heater (135) and a leak detecting circuit that is connected to the temperature sensors (133, 134) and produces an output equivalent to a temperature difference sensed by these temperature sensors, whereby a value equivalent to a liquid flow rate is calculated by integrating the difference between an output from the leak detecting circuit and its initial value according to a single pulse voltage applied to the heater (135) by the pulse voltage generating circuit, and leakage of liquid from the tank is detected based on this value.
    • 一种检漏仪,包括一个传感器单元,该传感器单元包括一个测量细长管,通过其下端引入一个罐内的液体,一个连接到其上端的测量管, 以及设置在细长管(13b)上的温度传感器(133,134)和加热器(135),以及与传感器单元连接的泄漏检测控制单元(15a)。 泄漏检测控制单元(15A)具有用于向加热器(135)施加单个脉冲电压的脉冲电压产生电路和连接到温度传感器(133,134)的泄漏检测电路,并产生相当于 由这些温度传感器感测到的温度差,由此通过根据施加到加热器(135)的单个脉冲电压积分来自泄漏检测电路的输出与其初始值之间的差异来计算与液体流量相当的值, 基于该值检测脉冲电压产生电路和液体从罐中的泄漏。
    • 4. 发明申请
    • Leak detector of liquid in tank
    • 液体液体泄漏检测器
    • US20070157706A1
    • 2007-07-12
    • US10577543
    • 2004-08-30
    • Kiyotaka YanagiAtsushi KoikeToshimi NakamuraKiyoshi YamagishiHideshi Sekimori
    • Kiyotaka YanagiAtsushi KoikeToshimi NakamuraKiyoshi YamagishiHideshi Sekimori
    • G01M3/32
    • G01M3/3254G01M3/002G01M3/3245
    • A leak detector comprising a sensor unit including a measuring slim-tube (13b) via the lower end of which a liquid in a tank is led in/out, a measuring tube (17) connected to the upper end thereof and having a sectional area larger than that thereof, and temperature sensors (133, 134) and a heater (135) provided to the slim-tube (13b), and a leak detection control unit (15a) connected to the sensor unit. The leak detection control unit (15a) has a pulse voltage generating circuit for applying a single pulse voltage to the heater (135) and a leak detecting circuit that is connected to the temperature sensors (133, 134) and produces an output equivalent to a temperature difference sensed by these temperature sensors, whereby a value equivalent to a liquid flow rate is calculated by integrating the difference between an output from the leak detecting circuit and its initial value according to a single pulse voltage applied to the heater (135) by the pulse voltage generating circuit, and leakage of liquid from the tank is detected based on this value.
    • 一种检漏仪,包括一个传感器单元,该传感器单元包括一个测量细长管,通过其下端引入一个罐内的液体,一个连接到其上端的测量管, 以及设置在细长管(13b)上的温度传感器(133,134)和加热器(135),以及与传感器单元连接的泄漏检测控制单元(15a)。 泄漏检测控制单元(15A)具有用于向加热器(135)施加单个脉冲电压的脉冲电压产生电路和连接到温度传感器(133,134)的泄漏检测电路,并产生相当于 由这些温度传感器感测到的温度差,由此通过根据施加到加热器(135)的单个脉冲电压积分来自泄漏检测电路的输出与其初始值之间的差异来计算与液体流量相当的值, 基于该值检测脉冲电压产生电路和液体从罐中的泄漏。