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1. 发明授权

US5475235A Control of laser light power output for use in light scattering instruments by inducing mode hopping and averaging result 失效
标题翻译：通过诱导跳频和平均结果控制用于光散射仪器的激光功率输出
公开(公告)号：US5475235A
公开(公告)日：1995-12-12
申请号：US105200
申请日：1993-08-09
申请人： David T. Phillips , Gary R. Janik
发明人： David T. Phillips , Gary R. Janik
IPC分类号： G01N15/02 , H01S5/042 , G01N15/06
CPC分类号： H01S5/042 , G01N15/0205 , H01S5/0427
摘要： The incorporation of certain classes of solid state lasers into light scattering instrumentation is desirable because of their compact structure. However, mode hopping often causes the output power produced by such lasers to be unstable. The frequency of such output power fluctuations is often so broad that output power monitoring means, characteristic of the light scattering instrumentation into which such lasers are incorporated, cannot track accurately the temporal output power fluctuations. A method, and associated apparatus, is described whereby the laser drive current is modulated at low frequency and amplitude sufficient to induce and thereby control mode hopping so as to permit accurate measurement of the ratio of light scattering signals to the laser output power.
摘要翻译：由于其紧凑的结构，将某些类别的固态激光器并入光散射仪器是合乎需要的。然而，跳频通常会导致由这种激光器产生的输出功率不稳定。这种输出功率波动的频率通常如此宽泛，使得其中结合有这种激光器的光散射仪器的特征的输出功率监视装置不能精确地跟踪时间输出功率波动。描述了一种方法和相关联的装置，其中激光驱动电流被调制在足够低的频率和幅度，以便引起并由此控制模式跳变，以便准确地测量光散射信号与激光输出功率的比率。

2. 发明授权

US4156809A Data acquisition system 失效
标题翻译：数据采集系统
公开(公告)号：US4156809A
公开(公告)日：1979-05-29
申请号：US875822
申请日：1978-02-07
申请人： David T. Phillips
发明人： David T. Phillips
IPC分类号： G01R13/32 , H04B10/12 , H04B9/00 , G01R13/04
CPC分类号： G01R13/325 , H04B10/508 , H04B10/588
摘要： A data acquisition system capable of resolving transient pulses in the subnanosecond range. A pulse in an information carrying medium such as light is transmitted through means which disperse the pulse, such as a fiber optic light guide which time-stretches optical pulses by chromatic dispersion. This time-stretched pulse is used as a sampling pulse and is modulated by the signal to be recorded. The modulated pulse may be further time-stretched prior to being recorded. The recorded modulated pulse is unfolded to derive the transient signal by utilizing the relationship of the time-stretching that occurred in the original pulse.
摘要翻译：一种数据采集系统，能够解析亚纳秒范围内的瞬态脉冲。诸如光之类的信息传送介质中的脉冲通过分散脉冲的装置传输，例如通过色散时间延伸光脉冲的光纤光导。该延时脉冲用作采样脉冲，并被要记录的信号调制。调制脉冲可以在被记录之前被进一步延伸。记录的调制脉冲被展开以通过利用在原始脉冲中发生的时间延伸的关系导出瞬态信号。

3. 发明授权

US4417141A Optical shaft angle encoder 失效
标题翻译：光轴角度编码器
公开(公告)号：US4417141A
公开(公告)日：1983-11-22
申请号：US272397
申请日：1981-06-10
申请人： David T. Phillips
发明人： David T. Phillips
IPC分类号： G01P13/04 , G01P3/44
CPC分类号： G01P13/045
摘要： An optical shaft angle encoder which provides sensor output voltages having waveform characteristics modified for use with "multiplication type" tachometer converter circuits to provide improved servo control system performance by reducing step changes in the tachometer output voltage due to phase error and reducing tachometer output voltage ripple. The geometry of the encoder mask combination provides a non-sinusoidal sensor output voltage comprised of linear and parabolic segments having a trapezoidal derivative.
摘要翻译：一种光轴角度编码器，其提供具有修正的波形特性的传感器输出电压，用于与“倍增型”转速计转换器电路一起使用，以通过减少由于相位误差引起的转速计输出电压的阶跃变化并降低转速计输出电压纹波来提供改进的伺服控制系统性能。编码器掩模组合的几何形状提供非正弦传感器输出电压，其包括具有梯形导数的线性和抛物线段。

4. 发明授权

US6128080A Extended range interferometric refractometer 失效
$Extended range interferometric refractometer$
标题翻译：扩展距离干涉折射计
公开(公告)号：US6128080A
公开(公告)日：2000-10-03
申请号：US870937
申请日：1997-06-06
申请人： Gary R. Janik , Douglas W. Shepard , Steven P. Trainoff , David T. Phillips
发明人： Gary R. Janik , Douglas W. Shepard , Steven P. Trainoff , David T. Phillips
IPC分类号： G01N21/45 , G01B9/02
CPC分类号： G01N21/45
摘要： A method and apparatus is disclosed for measuring the refractive index difference between a reference and sample liquid based on an interferometric design. The resultant device has an almost unlimited range of operation in contrast to a conventional interferometric refractometer of the so-called polarization type whose dynamic range is restricted to a relatively narrow range of refractive indices. The measurement of the refractive index difference between a sample and reference cell is achieved by measuring the angle through which the plane of polarization of a combined beam has rotated. For the conventional device, this angle is restricted to about .pi. radians which corresponds to a half wavelength shift between the reference and sample components of said combined beam. The extended range device disclosed permits this angle to be tracked and measured accurately over many rotations. The rotation tracking is achieved by one of three embodiments, the preferred of which involves the use of a liquid crystal retarder. The other two techniques incorporate, respectively, a rotating polarizer and a doubly split beam. All three embodiments permit the measurement of both the sine and cosine of the rotation angle and, thereby, allows a four quadrant arctangent calculation to yield the rotation angle directly. The error associated with such measurements is not a function of the rotation angle of the combined beams.
摘要翻译：公开了一种用于基于干涉测量设计来测量参考和样品液体之间的折射率差的方法和装置。与所谓的偏振型的常规干涉式折射计相反，所得到的装置具有几乎无限的操作范围，其中动态范围被限制在相对较窄的折射率范围。通过测量组合光束的偏振平面旋转的角度来实现样品和参考单元之间的折射率差的测量。对于常规装置，该角度限于对应于所述组合光束的参考和样本分量之间的半波长偏移的约π弧度。所公开的扩展范围装置允许在许多旋转中精确地跟踪和测量该角度。旋转跟踪由三个实施例中的一个实现，其中优选涉及使用液晶延迟器。其他两种技术分别包括旋转偏振器和双分束。所有三个实施例允许测量旋转角度的正弦和余弦两者，从而允许四象限反正切计算直接产生旋转角度。与这种测量相关联的误差不是组合光束的旋转角度的函数。

5. 发明授权

US4140018A Programmable action sampler system 失效
标题翻译：可编程动作采样系统
公开(公告)号：US4140018A
公开(公告)日：1979-02-20
申请号：US831293
申请日：1977-09-07
申请人： Lawrence V. Maldarelli , David T. Phillips , William L. Proctor , Philip J. Wyatt , Thomas C. Urquhart
发明人： Lawrence V. Maldarelli , David T. Phillips , William L. Proctor , Philip J. Wyatt , Thomas C. Urquhart
IPC分类号： G01N35/00 , G01N35/10 , G01N1/14
CPC分类号： G01N35/00 , G01N2035/00534 , G01N2035/1025
摘要： A programmable action sampler system (PASS) is described which holds a large number of discrete samples in a matrix of separate sample cups. The system is capable of dispensing a sample from a sample line into any one of the sample cups. At a pre-determined later time, using a cannula, the system addresses the sample from the cup for further measurement or analysis. In the preferred system, the samples flow sequentially through a tube, the liquid intermediate the samples being dispensed into a liquid waste line. The cannula between samples is bathed constantly in a wash tube, even while moving from one sample location to another. Further, in the preferred application, bacterial samples are employed, the sample cups being immersed in a constant temperature liquid bath to hold the bacterial samples at a constant incubation temperature. Among the various novel features employed in the system is a blade brake structure that accurately locates the sample head and cannula over any selected sample cup.
摘要翻译：描述了可编程动作取样器系统（PASS），其在单独的样品杯的矩阵中保持大量离散样本。该系统能够将来自样品管线的样品分配到任何一个样品杯中。在预先确定的较后时间，使用插管，该系统将来自杯子的样品解决以进一步测量或分析。在优选的系统中，样品依次流过管，液体将样品分配到液体废液管线中。即使在从一个样品位置移动到另一个样品位置时，样品之间的插管也会不断地洗在洗涤管中。此外，在优选的应用中，使用细菌样品，将样品杯浸入恒温液浴中以将细菌样品保持在恒定培养温度。在该系统中使用的各种新颖特征之中，是将样品头和套管精确地定位在任何选定的样品杯上的叶片制动结构。

6. 发明授权

US4015593A Apparatus and method for measuring cardiac output 失效
标题翻译：用于测量心输出量的装置和方法
公开(公告)号：US4015593A
公开(公告)日：1977-04-05
申请号：US561650
申请日：1975-03-24
申请人： Virgil B. Elings , David T. Phillips
发明人： Virgil B. Elings , David T. Phillips
IPC分类号： A61B5/028 , A61B5/02
CPC分类号： A61B5/028
摘要： A thermodilution cardiac output computer uses an autobalancing temperature-measuring circuit which adjusts the initial voltage derived from a thermistor and then holds constant the current through the thermistor as the thermistor responds to different temperatures in a blood-injectate mixture. The initial voltage is adjusted to a predetermined constant so that the response from thermistors of different initial resistance is the same. A Wheatstone bridge is not used. Before the temperature measurement, the voltage derived from the thermistor is adjusted to be equal to a predetermined constant either by varying the current through the thermistor or, with a constant current through the thermistor, by varying the gain of the amplifier sensing the voltage across the thermistor. During the temperature measurement this current or gain is held constant. The voltage change derived from the thermistor is integrated in a conventional integrator, and the integration is stopped at the tail of the decay of the temperature-time curve by an automatic timer. This termination point is calculated not as a percentage of the peak value of the curve or at a particular slope of the curve, but as a function of the time of two points high on the decay curve where the artifacts causing undulations in the curve are small compared to the temperature height of the curve. In this fashion, the triggering of the cutoff point by undulations in the curve is avoided.
摘要翻译：热稀释心输出计算机使用自动平衡温度测量电路，其调节从热敏电阻得到的初始电压，然后当热敏电阻响应于血液注射混合物中的不同温度时，保持恒定的电流通过热敏电阻。将初始电压调整到预定的常数，使得来自不同初始电阻的热敏电阻的响应是相同的。惠斯通电桥不使用。在温度测量之前，通过改变通过热敏电阻的电流，或者通过热敏电阻的恒定电流，通过改变放大器的增益来感测两端的电压，将从热敏电阻得到的电压调整到等于预定的常数热敏电阻在温度测量期间，此电流或增益保持不变。从热敏电阻得到的电压变化集成在传统的积分器中，通过自动计时器在温度 - 时间曲线衰减的尾部停止积分。该终止点的计算不是曲线的峰值或曲线的特定斜率的百分比，而是作为曲线上引起波动的伪像小的衰减曲线上两个高点的时间的函数与曲线的温度高度相比。以这种方式，避免了曲线中起伏的触发截止点。

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