-
公开(公告)号：US20120073598A1
公开(公告)日：2012-03-29
申请号：US13173185
申请日：2011-06-30
CPC分类号： B08B3/12 , B08B9/032 , B08B2209/005 , G01N9/00
摘要： A method for cleaning the U-tube of the measurement cell of a densimeter, the measurement cell including an isothermic enclosure defining a measurement chamber closed by a stopper surrounded by a resilient seal, a U-tube extending inside the measurement chamber for containing a sample, the U-tube secured to the stopper at a base of the U-tube which includes free ends projecting outwardly from the measurement chamber to permit injection of the sample via an injection opening and evacuation of the sample via an evacuation opening, and means for causing the U-tube to vibrate. The method comprises, following a step of analyzing a sample, injecting a rinsing solvent into the injection opening of the U-tube, and subjecting the stopper to ultrasonic waves.
摘要翻译： 一种用于清洁密度计的测量单元的U形管的方法，所述测量单元包括限定由由弹性密封件包围的塞子封闭的测量室的等温外壳，在测量室内延伸以容纳样品的U形管 U型管固定在U形管的底部，该底座包括从测量室向外突出的自由端，以允许通过注射开口注入样品并经抽真空抽出样品，以及用于 导致U型管振动。 该方法包括：在分析样品的步骤之后，将冲洗溶剂注入到U形管的注射口中，并对塞子进行超声波。
-
2.发明授权公开(公告)号：US08876977B2
公开(公告)日：2014-11-04
申请号：US13173185
申请日：2011-06-30
CPC分类号： B08B3/12 , B08B9/032 , B08B2209/005 , G01N9/00
摘要： A method for cleaning the U-tube of the measurement cell of a densimeter, the measurement cell including an isothermic enclosure defining a measurement chamber closed by a stopper surrounded by a resilient seal, a U-tube extending inside the measurement chamber for containing a sample, the U-tube secured to the stopper at a base of the U-tube which includes free ends projecting outwardly from the measurement chamber to permit injection of the sample via an injection opening and evacuation of the sample via an evacuation opening, and means for causing the U-tube to vibrate. The method comprises, following a step of analyzing a sample, injecting a rinsing solvent into the injection opening of the U-tube, and subjecting the stopper to ultrasonic waves.
摘要翻译： 一种用于清洁密度计的测量单元的U形管的方法，所述测量单元包括限定由由弹性密封件包围的塞子封闭的测量室的等温外壳，在测量室内延伸以容纳样品的U形管 U型管固定在U形管的底部，该底座包括从测量室向外突出的自由端，以允许通过注射开口注入样品并经抽真空抽出样品，以及用于 导致U型管振动。 该方法包括：在分析样品的步骤之后，将冲洗溶剂注入到U形管的注射口中，并对塞子进行超声波。
-
公开(公告)号：US08707763B2
公开(公告)日：2014-04-29
申请号：US13173182
申请日：2011-06-30
IPC分类号： G01N9/00
CPC分类号： G01N9/002
摘要： A method for the accurate measurement of the density of a sample using a densimeter equipped with a measurement cell, a sample-containing U-tube including a ferromagnetic member, an insulated conductive reading plate maintained at a different potential relative to the U-tube, and an electromagnetic excitation winding. The method includes the steps of transmitting a synchronised rectangular excitation signal continuously to the U-tube to cause the U-tube to vibrate at resonance frequency, the vibration being represented by a sinusoidal resonance signal; determining the resonance frequency from the variations in the voltage at the terminals of the capacitor and deducing an approximate value of the density of the sample; controlling the pulse width of the rectangular excitation signal to maintain a predefined constant amplitude of the resonance signal; and deducing a correction factor dependent on the viscosity of the sample.
摘要翻译： 使用配备有测量单元的密度计，包含铁磁性构件的含有试样的U形管，相对于U形管保持不同电位的绝缘导电读板，精确测量样品的密度的方法， 和电磁励磁绕组。 该方法包括以下步骤：向U形管连续传输同步的矩形激励信号，使U形管以共振频率振动，振动由正弦共振信号表示; 根据电容器端子处的电压变化确定谐振频率，并推导出样品密度的近似值; 控制矩形激励信号的脉冲宽度以维持谐振信号的预定义的恒定幅度; 并推导出取决于样品粘度的校正因子。
-
公开(公告)号：US20120073368A1
公开(公告)日：2012-03-29
申请号：US13173182
申请日：2011-06-30
IPC分类号： G01N9/00
CPC分类号： G01N9/002
摘要： A method for the accurate measurement of the density of a sample using a densimeter equipped with a measurement cell, a sample-containing U-tube including a ferromagnetic member, an insulated conductive reading plate maintained at a different potential relative to the U-tube, and an electromagnetic excitation winding. The method includes the steps of transmitting a synchronised rectangular excitation signal continuously to the U-tube to cause the U-tube to vibrate at resonance frequency, the vibration being represented by a sinusoidal resonance signal; determining the resonance frequency from the variations in the voltage at the terminals of the capacitor and deducing an approximate value of the density of the sample; controlling the pulse width of the rectangular excitation signal to maintain a predefined constant amplitude of the resonance signal; and deducing a correction factor dependent on the viscosity of the sample.
摘要翻译： 使用配备有测量单元的密度计，包含铁磁性构件的含有试样的U形管，相对于U形管保持不同电位的绝缘导电读板，精确测量样品的密度的方法， 和电磁励磁绕组。 该方法包括以下步骤：向U形管连续传输同步的矩形激励信号，使U形管以共振频率振动，振动由正弦共振信号表示; 根据电容器端子处的电压变化确定谐振频率，并推导出样品密度的近似值; 控制矩形激励信号的脉冲宽度以维持谐振信号的预定义的恒定幅度; 并推导出取决于样品粘度的校正因子。
-
-
-
搜索结果
4 条记录 (耗时 0.012 秒)
