Method and apparatus for calibrating gas samplers
    2.
    发明授权
    Method and apparatus for calibrating gas samplers 有权
    校准气体取样器的方法和装置

    公开(公告)号:US06227031B1

    公开(公告)日:2001-05-08

    申请号:US09325333

    申请日:1999-06-03

    IPC分类号: G01N2100

    摘要: A method for calibrating a personal air sampler. A desired flow rate is set, the actual rate measured and recorded through a plurality of runs, the results are automatically averaged and compared to the desired flow and the pump is automatically adjusted accordingly. The process may be repeated for a plurality of selected flow rates, and a best-fit curve computed to cover the entire range. Stability is tested by a series of sets of runs to determine erratic behavior, and an overall calibration is conducted by performing such a series of runs at each of several set point flows.

    摘要翻译: 一种用于校准个人空气取样器的方法。 设定期望的流量,通过多次运行测量和记录的实际速率,结果被自动平均,并与期望的流量进行比较,并且相应地自动调整泵。 可以针对多个选定的流速重复该过程,并且计算出覆盖整个范围的最佳拟合曲线。 通过一系列运行来测试稳定性以确定不稳定的行为,并且通过在几个设定点流中的每一个执行这样的一系列运行来进行整体校准。

    Isothermal flow controller for air sampler
    3.
    发明授权
    Isothermal flow controller for air sampler 失效
    空气采样器等温流量控制器

    公开(公告)号:US5892160A

    公开(公告)日:1999-04-06

    申请号:US75103

    申请日:1998-05-08

    申请人: Peter M. Hall

    发明人: Peter M. Hall

    IPC分类号: G01N1/22 G01N1/24

    摘要: An air or gas sampling device utilizes a small tube calibrated under isothermal conditions. The relationship of pressure at the input end of the tube to flow is plotted and stored in a microprocessor for comparison with pressure monitored during sample pumping. Pulsations in flow caused by the air or gas pump can be neutralized by a damper comprising a small chamber having a diaphragm for one wall.

    摘要翻译: 空气或气体采样装置利用在等温条件下校准的小管。 将管的输入端的压力与流动的关系绘制并存储在微处理器中,以与样品泵送期间监测的压力进行比较。 由空气或气体泵引起的流动脉冲可以由包括具有用于一个壁的隔膜的小室的阻尼器中和。

    Modular particulate sampler
    5.
    发明授权
    Modular particulate sampler 有权
    模块化颗粒物采样器

    公开(公告)号:US07334453B2

    公开(公告)日:2008-02-26

    申请号:US11213528

    申请日:2005-08-26

    IPC分类号: G01N1/00 G01N1/24

    摘要: A gas sampler includes an impact disc for removing larger particles from a gas flow drawn by a pump and a filter for capturing smaller particles, also positioned in the flow path. The sampler is conveniently dissembled and reassembled to remove and replace the impact disc and the filter. Particles removed, especially on the filter, may be observed or analyzed. The impact disc may be coated with an oil or other viscous substance to enhance its ability to retain larger particles. The flow path may be entirely annular after striking the impact disc—that is, around the outside of the impact disc but a portion of the flow path may proceed directly through a central aperture in the impact disc after striking it.

    摘要翻译: 气体取样器包括用于从由泵抽出的气流中除去较大颗粒的冲击盘和用于捕获较小颗粒的过滤器,该颗粒也位于流动路径中。 取样器方便地拆卸并重新组装,以移除和更换冲击盘和过滤器。 可以观察或分析除去的颗粒,特别是在过滤器上。 撞击盘可以用油或其它粘性物质涂覆以增强其保留较大颗粒的能力。 撞击冲击盘之后流动路径可以是完全环形的,也就是冲击盘的外侧,但是一部分流动路径可以在撞击盘之后直接通过碰撞盘中的中心孔。

    Crank shaft power takeoff system and method
    6.
    发明授权
    Crank shaft power takeoff system and method 有权
    曲轴动力起飞系统及方法

    公开(公告)号:US07311626B2

    公开(公告)日:2007-12-25

    申请号:US10791366

    申请日:2004-03-01

    IPC分类号: F16H7/10 F16H7/08 B62J13/00

    摘要: A crank shaft power takeoff system, including an appliance intended for use in connection with lawns and/or gardens, the appliance including an engine that includes a crank shaft, the system further including an accessory used in conjunction with the appliance, and a transmission for utilizing the crank shaft of the appliance engine to operate the accessory.

    摘要翻译: 一种曲柄轴动力输出系统,包括旨在用于与草坪和/或花园连接的装置,所述装置包括包括曲轴的发动机,所述系统还包括与所述装置结合使用的附件,以及用于 利用器具发动机的曲轴操作附件。

    Air sampler with compensating pump motor speed
    7.
    发明授权
    Air sampler with compensating pump motor speed 有权
    空气采样器具有补偿泵电机转速

    公开(公告)号:US06741056B1

    公开(公告)日:2004-05-25

    申请号:US10146369

    申请日:2002-05-15

    申请人: Peter M. Hall

    发明人: Peter M. Hall

    IPC分类号: G05B1128

    摘要: A constant flow of air through a personal air sampler is provided regardless of changes in the air flow path, by altering the pump speed as a function of the power taken by the pump. The characteristics of the pump are precalibrated to provide a constant used together with the square of the voltage appearing across the motor armature coils (applied voltage minus back Emf), which reflects the power currently used, to adjust the motor speed and thus provide a constant flow of air under changing conditions of resistance.

    摘要翻译: 通过改变作为泵的功率的函数的泵速度,不管空气流动路径的变化如何,均通过个人空气采样器的空气流量恒定地提供。 泵的特性被预校准,以提供与电动机电枢线圈(施加电压减去Emf)之间出现的电压的平方一起使用的常数,其反映了当前使用的功率,以调整电动机速度并因此提供恒定 在变化的电阻条件下空气流动。

    Method and apparatus for calibrating personal air samplers
    8.
    发明授权
    Method and apparatus for calibrating personal air samplers 有权
    用于校准个人空气取样器的方法和装置

    公开(公告)号:US06363769B2

    公开(公告)日:2002-04-02

    申请号:US09757221

    申请日:2001-01-09

    IPC分类号: G01N116

    摘要: A method for calibrating a personal air sampler. A desired flow rate is set, the actual rate measured and recorded through a plurality of runs, the results are automatically averaged and compared to the desired flow and the pump is automatically adjusted accordingly. The process may be repeated for a plurality of selected flow rates, and a best-fit curve computed to cover the entire range. Stability is tested by a series of sets of runs to determine erratic behavior, and an overall calibration is conducted by performing such a series of runs at each of several set point flows.

    摘要翻译: 一种用于校准个人空气取样器的方法。 设定期望的流量,通过多次运行测量和记录的实际速率,结果被自动平均,并与期望的流量进行比较,并且相应地自动调整泵。 可以针对多个选定的流速重复该过程,并且计算出覆盖整个范围的最佳拟合曲线。 通过一系列运行来测试稳定性以确定不稳定的行为,并且通过在几个设定点流中的每一个执行这样的一系列运行来进行整体校准。

    Air sampler with parallel impactors
    9.
    发明授权
    Air sampler with parallel impactors 有权
    空气采样器带平行冲击器

    公开(公告)号:US07073402B2

    公开(公告)日:2006-07-11

    申请号:US10639564

    申请日:2003-08-12

    IPC分类号: G01N1/24 G01N1/40

    CPC分类号: G01N1/2208

    摘要: An air sampler is designed for a predetermined flow rate. The air flow is admitted to at least two impactors operating in parallel. Preferably the inlet nozzles and the outlet orifices of each impactor are sized to achieve predetermined cut-off sizes of particles; preferably the composite curve of all the impactors will mimic a predetermined particle sampling efficiency curve.

    摘要翻译: 空气采样器设计用于预定的流量。 至少有两个并联运行的冲击器允许气流进入。 优选地,每个冲击器的入口喷嘴和出口孔的尺寸被设计成达到预定的颗粒尺寸; 优选地,所有冲击器的复合曲线将模拟预定的粒子采样效率曲线。