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1. 发明授权

US08517597B2 Valve switch modulation for reducing errors due oscillations of the inlet fluid of a pump system 有权
标题翻译：阀门开关调节，用于减少泵系统入口流体振荡造成的误差
公开(公告)号：US08517597B2
公开(公告)日：2013-08-27
申请号：US13063382
申请日：2009-09-10
申请人： Joshua A. Shreve , Steven J. Ciavarini
发明人： Joshua A. Shreve , Steven J. Ciavarini
IPC分类号： B01F15/04 , B01F13/00
CPC分类号： B01F15/0479 , B01D15/14 , B01F15/0216 , G01N30/34 , G01N30/36 , G01N35/00871 , G01N35/1097 , G01N2030/347 , G01N2035/00544 , G05D11/133
摘要： Described is a method of reducing liquid composition errors in a low-pressure mixing pump system. Packets representing the switching intervals of each component of the desired fluid mixture are provided to an intake of the mixing pump system. For each packet, a switching time associated with at least one of the components in the packet is modulated. Modulated switching times are based on time offsets that are specifically selected according to the undesirable frequency characteristic of an intake response of the mixing pump system. The average of the volumes contributed by the packets thus modulated is equal to a component volume that achieves a desired proportion of the component in the output flow of the mixing pump system. Modulated switching times enable the reduction or elimination of composition error in the output flow of the mixing pump system.
摘要翻译：描述了在低压混合泵系统中减少液体组成误差的方法。表示所需流体混合物的每个组分的切换间隔的分组被提供给混合泵系统的进气口。对于每个分组，调制与分组中的至少一个分量相关联的切换时间。调制切换时间基于根据混合泵系统的进气响应的不期望的频率特性而特别选择的时间偏移。由如此调制的分组贡献的卷的平均值等于在混合泵系统的输出流中实现组分的期望比例的分量体积。调制切换时间可以减少或消除混合泵系统的输出流量中的组成误差。

2. 发明申请

US20120285872A1 THERMAL CONTROL OF THERMAL CHAMBER IN HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY SYSTEMS 有权
标题翻译：高性能液相色谱系统中热室的热控制
公开(公告)号：US20120285872A1
公开(公告)日：2012-11-15
申请号：US13519776
申请日：2011-01-11
申请人： Joshua A. Shreve , Steven J. Ciavarini
发明人： Joshua A. Shreve , Steven J. Ciavarini
IPC分类号： F25B21/02 , B01D15/10
CPC分类号： F25B21/02 , F25B2321/0212 , F25B2321/0251 , F25B2700/2103 , F25D2700/02 , F25D2700/12 , F25D2700/123 , G01N30/24 , G01N30/30 , G01N2030/303
摘要： A sample manager of a liquid chromatography system implements a thermal system that uses a dual-loop feedback control system to control temperature within a thermal chamber. The sample manager includes an external heatsink disposed externally to the thermal chamber, an internal heatsink disposed within the thermal chamber, and one or more thermoelectric devices thermally coupled to the external and internal heatsinks to transfer heat therebetween in response to a pulse-width modulated power signal. A first temperature sensor disposed within the thermal chamber continuously measures a chamber temperature. A second temperature sensor coupled to the internal heatsink within the thermal chamber continuously measures temperature at the internal heatsink. A feedback control system controls a duty cycle of the pulse-width modulated power signal in response to a target chamber temperature and real-time temperature measurements produced by the first and second temperature sensors.
摘要翻译：液相色谱系统的样品管理器实现了使用双回路控制系统来控制热室内的温度的热系统。样品管理器包括设置在热室的外部的外部散热器，设置在热室内的内部散热器，以及一个或多个热耦合到外部和内部散热器的热电装置，以响应于脉冲宽度调制功率信号。设置在热室内的第一温度传感器连续测量腔室温度。耦合到热室内的内部散热器的第二温度传感器连续测量内部散热器的温度。反馈控制系统响应于目标腔室温度和由第一和第二温度传感器产生的实时温度测量值来控制脉冲宽度调制功率信号的占空比。

3. 发明授权

US08829844B2 Intake profile for optimized utilization of motor characteristics 有权
标题翻译：进气轮廓优化电机特性
公开(公告)号：US08829844B2
公开(公告)日：2014-09-09
申请号：US13063291
申请日：2009-09-10
申请人： Joshua A. Shreve , Steven J. Ciavarini
发明人： Joshua A. Shreve , Steven J. Ciavarini
IPC分类号： H02P8/00 , F04B17/03 , G01N30/34 , G01N30/32
CPC分类号： H02P8/14 , F04B17/03 , F04B49/065 , F04B2203/0207 , F04B2203/0209 , G01N30/34 , G01N2030/326
摘要： Systems and methods for operating a stepper motor of a pump at a desired low velocity include memory for storing information corresponding to an intake velocity profile. The intake velocity profile represents an optimized acceleration curve for operating the stepper motor over a range of motor velocities during an intake cycle. A processor of a system controller dynamically accesses the memory during the intake cycle to acquire the information representing the intake velocity profile and issues a series of pulses to the stepper motor based on this information. In response to the pulses, the stepper motor accelerates in accordance with the optimized acceleration curve represented by the intake velocity profile. The optimized acceleration curve is based on the available torque of the stepper motor across a range of motor velocities and enables the motor to operate with greater torque utilization and less margin than traditional linear acceleration profiles.
摘要翻译：用于以期望的低速度操作泵的步进电动机的系统和方法包括用于存储对应于进气速度曲线的信息的存储器。进气速度曲线表示在进气循环期间在一定范围的电机速度下操作步进电机的优化加速曲线。系统控制器的处理器在进气循环期间动态地访问存储器以获取表示进气速度分布的信息，并基于该信息向步进电动机发出一系列脉冲。响应于脉冲，步进电机根据由进气速度分布表示的优化加速度曲线加速。优化的加速曲线基于步进电机在电机速度范围内的可用扭矩，并使电机能够以更大的转矩利用率和比传统线性加速度曲线更小的裕度运行。

4. 发明申请

US20110261642A1 Valve Switch Modulation For Reducing Errors Due Oscillations Of The Inlet Fluid Of A Pump System 有权
标题翻译：用于减少泵系统入口流体的错误的阀门开关调制
公开(公告)号：US20110261642A1
公开(公告)日：2011-10-27
申请号：US13063382
申请日：2009-09-10
申请人： Joshua A. Shreve , Steven J. Ciavarini
发明人： Joshua A. Shreve , Steven J. Ciavarini
IPC分类号： G05D11/02
CPC分类号： B01F15/0479 , B01D15/14 , B01F15/0216 , G01N30/34 , G01N30/36 , G01N35/00871 , G01N35/1097 , G01N2030/347 , G01N2035/00544 , G05D11/133
摘要： Described is a method of reducing liquid composition errors in a low-pressure mixing pump system. Packets representing the switching intervals of each component of the desired fluid mixture are provided to an intake of the mixing pump system. For each packet, a switching time associated with at least one of the components in the packet is modulated. Modulated switching times are based on time offsets that are specifically selected according to the undesirable frequency characteristic of an intake response of the mixing pump system. The average of the volumes contributed by the packets thus modulated is equal to a component volume that achieves a desired proportion of the component in the output flow of the mixing pump system. Modulated switching times enable the reduction or elimination of composition error in the output flow of the mixing pump system.
摘要翻译：描述了在低压混合泵系统中减少液体组成误差的方法。表示所需流体混合物的每个组分的切换间隔的分组被提供给混合泵系统的进气口。对于每个分组，调制与分组中的至少一个分量相关联的切换时间。调制切换时间基于根据混合泵系统的进气响应的不期望的频率特性而特别选择的时间偏移。由如此调制的分组贡献的卷的平均值等于在混合泵系统的输出流中实现组分的期望比例的分量体积。调制切换时间可以减少或消除混合泵系统的输出流量中的组成误差。

5. 发明授权

US09091467B2 Thermal control of thermal chamber in high-performance liquid chromatography systems 有权
标题翻译：高效液相色谱系统中热室的热控制
公开(公告)号：US09091467B2
公开(公告)日：2015-07-28
申请号：US13519776
申请日：2011-01-11
申请人： Joshua A. Shreve , Steven J. Ciavarini
发明人： Joshua A. Shreve , Steven J. Ciavarini
IPC分类号： F25B21/02 , G01N30/24 , G01N30/30
CPC分类号： F25B21/02 , F25B2321/0212 , F25B2321/0251 , F25B2700/2103 , F25D2700/02 , F25D2700/12 , F25D2700/123 , G01N30/24 , G01N30/30 , G01N2030/303
摘要： A sample manager of a liquid chromatography system implements a thermal system that uses a dual-loop feedback control system to control temperature within a thermal chamber. The sample manager includes an external heatsink disposed externally to the thermal chamber, an internal heatsink disposed within the thermal chamber, and one or more thermoelectric devices thermally coupled to the external and internal heatsinks to transfer heat therebetween in response to a pulse-width modulated power signal. A first temperature sensor disposed within the thermal chamber continuously measures a chamber temperature. A second temperature sensor coupled to the internal heatsink within the thermal chamber continuously measures temperature at the internal heatsink. A feedback control system controls a duty cycle of the pulse-width modulated power signal in response to a target chamber temperature and real-time temperature measurements produced by the first and second temperature sensors.
摘要翻译：液相色谱系统的样品管理器实现了使用双回路控制系统来控制热室内的温度的热系统。样品管理器包括设置在热室的外部的外部散热器，设置在热室内的内部散热器，以及一个或多个热耦合到外部和内部散热器的热电装置，以响应于脉冲宽度调制功率信号。设置在热室内的第一温度传感器连续测量腔室温度。耦合到热室内的内部散热器的第二温度传感器连续测量内部散热器的温度。反馈控制系统响应于目标腔室温度和由第一和第二温度传感器产生的实时温度测量值来控制脉冲宽度调制功率信号的占空比。

6. 发明申请

US20120032628A1 Intake Profile For Optimized Utilization Of Motor Characteristics 有权
标题翻译：电机特性的优化利用率
公开(公告)号：US20120032628A1
公开(公告)日：2012-02-09
申请号：US13063291
申请日：2009-09-10
申请人： Joshua A. Shreve , Steven J. Ciavarini
发明人： Joshua A. Shreve , Steven J. Ciavarini
IPC分类号： H02P8/14
CPC分类号： H02P8/14 , F04B17/03 , F04B49/065 , F04B2203/0207 , F04B2203/0209 , G01N30/34 , G01N2030/326
摘要： Systems and methods for operating a stepper motor of a pump at a desired low velocity include memory for storing information corresponding to an intake velocity profile. The intake velocity profile represents an optimized acceleration curve for operating the stepper motor over a range of motor velocities during an intake cycle. A processor of a system controller dynamically accesses the memory during the intake cycle to acquire the information representing the intake velocity profile and issues a series of pulses to the stepper motor based on this information. In response to the pulses, the stepper motor accelerates in accordance with the optimized acceleration curve represented by the intake velocity profile. The optimized acceleration curve is based on the available torque of the stepper motor across a range of motor velocities and enables the motor to operate with greater torque utilization and less margin than traditional linear acceleration profiles.
摘要翻译：用于以期望的低速度操作泵的步进电动机的系统和方法包括用于存储对应于进气速度曲线的信息的存储器。进气速度曲线表示在进气循环期间在一定范围的电机速度下操作步进电机的优化加速曲线。系统控制器的处理器在进气循环期间动态地访问存储器以获取表示进气速度分布的信息，并基于该信息向步进电动机发出一系列脉冲。响应于脉冲，步进电机根据由进气速度分布表示的优化加速度曲线加速。优化的加速曲线基于步进电机在电机速度范围内的可用扭矩，并使电机能够以更大的转矩利用率和比传统线性加速度曲线更小的裕度运行。

7. 发明申请

US20110202188A1 DEVICES, SYSTEMS AND METHODS FOR FLOW-COMPENSATING PUMP-INJECTOR SYNCHRONIZATION 有权
标题翻译：泵浦注射器同步流动补偿装置，系统和方法
公开(公告)号：US20110202188A1
公开(公告)日：2011-08-18
申请号：US13035388
申请日：2011-02-25
申请人： Stanley P. Pensak, JR. , John Heden , Steven J. Ciavarini , John Lamoureux , Miguel Soares
发明人： Stanley P. Pensak, JR. , John Heden , Steven J. Ciavarini , John Lamoureux , Miguel Soares
IPC分类号： G05D16/00 , G05D11/02
CPC分类号： G01N30/34 , G01N35/1097
摘要： Systems, devices, and methods to mitigate the pressure disturbance associated with the injection of low-pressure analyte samples into a high-pressure HPLC fluid stream, to enhance chromatographic performance related to retention time and reproducibility. The preferred embodiment coordinates the injection run with active pressure control of a binary solvent delivery system to virtually eliminate the customary pressure drop when the low-pressure loop is brought on line. An additional benefit that enhances reproducibility is accomplished by forcing a consistent timing relationship between the injection run, the mechanical position of the delivery pump pistons, and the start and subsequent gradient delivery.
摘要翻译：用于减轻与将低压分析物样品注入高压HPLC流体流中相关联的压力扰动的系统，装置和方法，以增强与保留时间和再现性相关的色谱性能。优选实施例通过二元溶剂输送系统的主动压力控制来协调注入运行，以在低压回路在线时基本上消除常规的压降。通过强制喷射运行，输送泵活塞的机械位置以及开始和随后的梯度输送之间的一致的时间关系来实现增强再现性的另外的益处。

8. 发明授权

US6106238A Bubble detection and recovery in a liquid pumping system 有权
公开(公告)号：US6106238A
公开(公告)日：2000-08-22
申请号：US165602
申请日：1998-10-02
申请人： Steven J. Ciavarini , Robert J. Dumas
发明人： Steven J. Ciavarini , Robert J. Dumas
IPC分类号： F04B49/06 , F04B19/24
CPC分类号： F04B49/065 , F04B2201/0206 , F04B2205/503
摘要： A serial, dual piston high pressure fluid pumping system that overcomes the difficulties of gas in the fluid stream without the need for added mechanical valves or fluid paths. A bubble detection and recovery mechanism monitors compression and decompression volumes of the serially configured dual pump head pump, and the overall system delivery pressure. Bubble detection is effected by sensing a ratio of compression to decompression volume and determining if the ratio exceeds an empirical threshold that suggests the ratio of gas-to-liquid content of eluent or fluid in the system is beyond the pump's ability to accurately meter a solvent mixture. The magnitude of the ratio of compression to decompression volume indicates that either the intake stroke has a bubble or that the eluent has a higher-than-normal gas content. Once a bubble has been detected, recovery is effected by forcing the pump into a very high stroke volume with the compression and decompression stroke limits constrained to obtain the largest delivery stroke compression ratio that will expel a bubble or solvent that has detrimental quantities of gas.

9. 发明授权

US07241115B2 Methods and apparatus for determining the presence or absence of a fluid leak 有权
标题翻译：用于确定流体泄漏的存在或不存在的方法和装置
公开(公告)号：US07241115B2
公开(公告)日：2007-07-10
申请号：US10645082
申请日：2003-08-21
申请人： Joseph A. Luongo , Steven J. Ciavarini , Robert Q. Tacconi , Frank A. Rubino , Robert J. Dumas
发明人： Joseph A. Luongo , Steven J. Ciavarini , Robert Q. Tacconi , Frank A. Rubino , Robert J. Dumas
IPC分类号： F04B49/00 , G01M3/04 , G08B21/00
CPC分类号： F04B51/00 , F04B2205/04 , F04B2205/05
摘要： Embodiments of the present invention feature a method and apparatus for detecting defects, such as, leaks, component failure and adverse performance. One embodiment of the present apparatus for pumping fluid comprises a pumping chamber having an inlet and an outlet powered by a motor. The motor operates in pumping mode upon receiving a pumping signal. The apparatus further comprises at least one inlet valve in fluid communication with the inlet of the pumping chamber. And, the apparatus comprises a switchable valve in fluid communication with the outlet of the pumping chamber. The switchable valve has a closed position and an open position, and assumes the closed position upon receiving a close signal. A pressure measuring device is in fluid communication with the pumping chamber, between said inlet valve and switchable valve. The pressure measuring device determines a minimal pressure and first threshold pressure at a first time and a second threshold pressure at a second time. The control means calculates the slope of a line representing the difference of said first threshold pressure signal and said second threshold pressure signal over time and comparing the slope with a threshold decay value. And, the control means compares the minimal pressure to a minimal acceptable value. Deviations from such values represent a defect in the pump.
摘要翻译：本发明的实施例的特征在于用于检测诸如泄漏，部件故障和不利性能之类的缺陷的方法和装置。用于泵送流体的本装置的一个实施例包括具有由电动机供电的入口和出口的泵送室。电机在接收到泵送信号时以泵送模式工作。该装置还包括与泵送室的入口流体连通的至少一个入口阀。并且，该装置包括与泵送室的出口流体连通的可切换阀。可切换阀具有关闭位置和打开位置，并且在接收到闭合信号时处于关闭位置。压力测量装置与所述抽吸室在所述入口阀和可切换阀之间流体连通。压力测量装置在第一时间确定最小压力和第一阈值压力，并且在第二时间确定第二阈值压力。控制装置计算表示所述第一阈值压力信号和所述第二阈值压力信号随时间的差的线的斜率，并将该斜率与阈值衰减值进行比较。而且，控制装置将最小压力与最小可接受值进行比较。与这些值的偏差代表了泵的缺陷。

10. 发明授权

US5823747A Bubble detection and recovery in a liquid pumping system 失效
公开(公告)号：US5823747A
公开(公告)日：1998-10-20
申请号：US654759
申请日：1996-05-29
申请人： Steven J. Ciavarini , Robert J. Dumas
发明人： Steven J. Ciavarini , Robert J. Dumas
IPC分类号： F04B49/10 , F04B49/06 , F04B53/06 , B01D15/08
CPC分类号： F04B53/06 , F04B49/06 , F04B2201/0201 , F04B2205/05 , F04B2205/503
摘要： A serial, dual piston high pressure fluid pumping system that overcomes the difficulties of gas in the fluid stream without the need for added mechanical valves or fluid paths. A bubble detection and recovery mechanism monitors compression and decompression volumes of the serially configured dual pump head pump, and the overall system delivery pressure. Bubble detection is effected by sensing a ratio of compression to decompression volume and determining if the ratio exceeds an empirical threshold that suggests the ratio of gas-to-liquid content of eluent or fluid in the system is beyond the pump's ability to accurately meter a solvent mixture. The magnitude of the ratio of compression to decompression volume indicates that either the intake stroke has a bubble or that the eluent has a higher-than-normal gas content. Once a bubble has been detected, recovery is effected by forcing the pump into a very high stroke volume with the compression and decompression stroke limits constrained to obtain the largest delivery stroke compression ratio that will expel a bubble or solvent that has detrimental quantities of gas.

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