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1. 发明授权

US5781283A Process and arrangement for the measurement of physical values of light scattering moving particles by means of a laser doppler anemometer 失效
标题翻译：通过激光多普勒风速计测量光散射运动颗粒的物理值的过程和布置
公开(公告)号：US5781283A
公开(公告)日：1998-07-14
申请号：US644334
申请日：1996-05-10
申请人： Ehrhard Dammann , Juergen Bauer
发明人： Ehrhard Dammann , Juergen Bauer
IPC分类号： G01P3/36 , G01P5/00 , G01P5/26 , G01P15/093 , G01P21/02 , G01S17/58
CPC分类号： G01P15/093 , G01P5/26
摘要： A process is provided for measuring physical values of light-scattering moving particles by means of laser Doppler anemometry and to a corresponding laser Doppler anemometer (LDA) with phase modulation. Generating a moving intensity-modulated superimposition signal in the measured volume of a LDA which is based on an uncomplicated driving of the phase modulator is achieved by having the phase modulator being driven by two sinusoidal driving signals with different frequencies (.omega..sub.1, .omega..sub.2) which are coupled so as to be fixed with respect to phase and frequency and wherein one frequency (.omega..sub.2) is an integer multiple of the other frequency (.omega..sub.1), and a filter frequency (f.sub.F) which is a common multiple of the two frequencies (.omega..sub.1, .omega..sub.2) is filtered out from the output signal of the receiver by a bandpass filter. For this purpose, one of two sidebands occurring in the output signal of the receiver is suppressed by the appropriate amplitude adjustment of the driving signals at the phase modulator. The process and related arrangement are used for measuring velocity in flowing media and for measurements of length and acceleration of solid surfaces.
摘要翻译：提供了一种用于通过激光多普勒血流计测量光散射移动颗粒的物理值的方法以及具有相位调制的相应的激光多普勒风速计（LDA）。通过使相位调制器由具有不同频率（ω1，ω2）的两个正弦驱动信号驱动来实现基于相位调制器的不复杂驱动的LDA测量体积中的移动强度调制叠加信号，其被耦合以相对于相位和频率被固定，并且其中一个频率（ω2）是另一个频率（ω1）的整数倍，并且滤波器频率（fF）是两者的公倍数通过带通滤波器从接收器的输出信号中滤出频率（ω1，ω2）。为此，通过在相位调制器处的驱动信号的适当幅度调整来抑制发生在接收器的输出信号中的两个边带之一。该过程和相关布置用于测量流动介质中的速度和用于测量固体表面的长度和加速度。

2. 发明授权

US5459571A Multiple control frequency phase modulator in phase modulated interferometer precision distance measuring system 失效
标题翻译：相位调制干涉仪精密测距系统中的多控制频率相位调制器
公开(公告)号：US5459571A
公开(公告)日：1995-10-17
申请号：US189931
申请日：1994-02-01
申请人： Ehrhard Dammann , Juergen Bauer
发明人： Ehrhard Dammann , Juergen Bauer
IPC分类号： G01B9/02 , G01J1/44 , G01J9/02 , G01J9/04
CPC分类号： G01B9/02051 , G01B9/0201 , G01B9/02028 , G01B9/02083 , G01J9/02 , G01B2290/45 , G01J2001/4242 , G01J2009/0249 , G01J9/04
摘要： A phase-modulated interferometer has improved control and signal processing. Superimposition signals capable of evaluation in a phase-modulated interferometer without a complicated sawtooth control of the phase modulator are attained, in that two sinusoidal control signals which have modulation frequencies (.omega..sub.1, .omega..sub.2) and are rigidly coupled with respect to phase and frequency are applied to the known phase modulator and a cosine signal which is used in a conventional manner for evaluating the phase displacement is filtered of the superimposition signal generated in the interferometer by an electronic bandpass filter. At the filter frequency (.omega..sub.F) of the bandpass filter, an odd-number harmonic and an even-number harmonic of the two modulation frequencies (.omega..sub.1, .omega..sub.2) have the same frequency, when the amplitudes (.phi..sub.1, .phi..sub.2) of the control signals satisfy the condition for the suitable operating point of the phase modulator. The improvement has application to phase-modulated interferometers, in particular, for precision distance measuring devices, preferably by the heterodyne evaluating method.
摘要翻译：相位调制干涉仪具有改进的控制和信号处理。获得能够在相位调制干涉仪中进行评估的叠加信号，无需对相位调制器进行复杂的锯齿控制，因为具有调制频率（ω1，ω2）并相对于相位和频率刚性耦合的两个正弦控制信号应用于已知的相位调制器，并且以传统方式用于评估相位位移的余弦信号通过电子带通滤波器对在干涉仪中产生的叠加信号进行滤波。在带通滤波器的滤波器频率（ω-F）下，两个调制频率（ω1，ω2）的奇数谐波和偶数谐波具有相同的频率，当幅度（phi 1，phi 2 ）的控制信号满足相位调制器的合适工作点的条件。该改进适用于相位调制干涉仪，特别是用于精密距离测量装置，优选地通过外差评估方法。

3. 发明授权

US6078384A Process and arrangement for the evaluation of laser doppler signals 失效
标题翻译：用于评估激光多普勒信号的过程和布置
公开(公告)号：US6078384A
公开(公告)日：2000-06-20
申请号：US130754
申请日：1998-08-07
申请人： Ehrhard Dammann , Juergen Bauer
发明人： Ehrhard Dammann , Juergen Bauer
IPC分类号： G01P5/26 , G01S17/58 , G01S17/95 , G01P3/36 , G01B9/02 , G01N21/41
CPC分类号： G01S17/95 , G01P5/26 , G01S17/58
摘要： Processes and arrangements for the evaluation of laser Doppler signals, especially in laser Doppler anemometers (LDA) or vibrometers, are disclosed. The object of these processes and arrangements is to find a simple possibility for evaluating laser Doppler signals which retains the advantages of conventional frequency tracking demodulation and permits dependable actual measurements of velocities and derived movement values also for extremely low velocities and discontinuous particle flows. This object is achieved with the use of a laser Doppler anemometer (LDA) with bandpass filtration and frequency tracking demodulation, by generating at least one orthogonal frequency system which, as a sequence of four state intervals in an invertible one-to-one correlation, is formed of two additively superimposed rectangular functions with a phase displacement of .pi./2, a detector signal containing the Doppler frequency (f.sub.D) is compared after bandpass filtering with respect to its phase with the state intervals of the orthogonal frequency system, wherein a change in the phase position relative to the orthogonal frequency system triggers a compensation of the change in Doppler frequency generating a regulated mixing frequency (f.sub.M) which is coupled into the LDA, and the regulated mixing frequency (f.sub.M), as an equivalent of the Doppler frequency (f.sub.D), is likewise compared with an orthogonal frequency system and, as a result of the one-to-one sequence of state intervals, is evaluated such that the direction is designated.
摘要翻译：公开了用于评估激光多普勒信号的过程和布置，特别是在激光多普勒风速计（LDA）或振动计中。这些过程和布置的目的是找到一种评估激光多普勒信号的简单可能性，其保留了常规频率跟踪解调的优点，并且对于极低的速度和不连续的粒子流量也允许可靠的速度的实际测量和导出的运动值。通过生成至少一个正交频率系统，通过使用具有带通滤波和频率跟踪解调的激光多普勒风速计（LDA）来实现该目的，作为可逆一对一相关中的四个状态间隔的序列，由具有π/ 2的相位位移的两个相加叠加的矩形函数形成，包含多普勒频率（fD）的检测器信号相对于其与正交频率系统的状态间隔的相位在带通滤波之后进行比较，其中改变在相对于正交频率系统的相位位置触发补偿多普勒频率的变化，其产生耦合到LDA中的调节混频（fM）和调节混频（fM）作为多普勒频率（fD）同样与正交频率系统进行比较，并且作为状态间隔的一对一序列的结果被评估为指定方向。

4. 发明授权

US5450195A Phase-modulated interferometer for evaluating phase displacement resulting from charges in path length 失效
标题翻译：相位调制干涉仪用于评估由路径长度中的电荷产生的相位位移
公开(公告)号：US5450195A
公开(公告)日：1995-09-12
申请号：US201645
申请日：1994-02-25
申请人： Ehrhard Dammann , Juergen Bauer
发明人： Ehrhard Dammann , Juergen Bauer
IPC分类号： G01B9/02
CPC分类号： G01B9/0201 , G01B9/02028 , G01B9/02051 , G01B2290/45
摘要： A phase-modulated interferometer with novel control and signal processing utilizes superimposition signals capable of evaluation in a phase-modulated interferometer without complicated control of the phase modulator. A sinusoidal control signal with a modulation frequency (.omega..sub.0) having an amplitude (.psi..sub.0) is supplied to a known phase modulator. Multiplicative mixing of the superimposition signal produced in the interferometer from the measuring and reference arm with a sinusoidal signal of a determined mixing frequency (.omega..sub.M) which is rigidly coupled with respect to phase and frequency with the control signal is effected. When the amplitude (.psi..sub.0) of the control signal satisfies the condition for a suitable operating point of the phase modulator, a cosine signal conventionally used for evaluating the phase displacement is filtered out in an electronic bandpass filter at whose filter frequency (.omega..sub.F) the sum and difference frequencies of two harmonics of the modulation frequency (.omega..sub.0) and the mixing frequency (.omega..sub.M) assume the same value. The invention is applied in phase-modulated interferometers, in particular for precision distance measuring devices, preferably by the heterodyne evaluating method.
摘要翻译：具有新颖的控制和信号处理的相位调制干涉仪利用相位调制干涉仪中能够进行评估的叠加信号，而不需要相位调制器的复杂控制。具有幅度（psi 0）的调制频率（ω0）的正弦控制信号被提供给已知的相位调制器。实现了在干涉仪中从测量和参考臂产生的叠加信号与确定的混合频率（ω-M）的正弦信号的相乘混合，其与控制信号相对于频率和频率刚性耦合。当控制信号的振幅（psi 0）满足相位调制器的合适工作点的条件时，通常用于评估相位位移的余弦信号在其滤波频率（ω）为F的电子带通滤波器中滤除，调制频率（ω-0）和混合频率（ω-M）的两个谐波的和和差频率假定相同的值。本发明优选地通过外差评估方法应用于相位调制干涉仪，特别是用于精密距离测量装置。

5. 发明授权

US4210504A Method for measuring the electrophoretic mobility of particles 失效
标题翻译：测量颗粒电泳迁移率的方法
公开(公告)号：US4210504A
公开(公告)日：1980-07-01
申请号：US940793
申请日：1978-02-26
申请人： Klaus Friedel , Ehrhard Dammann , Hans-Joachim Pohl , Wolfgang Schutt , Hans-Ludwig Jensen
发明人： Klaus Friedel , Ehrhard Dammann , Hans-Joachim Pohl , Wolfgang Schutt , Hans-Ludwig Jensen
IPC分类号： G01N27/447 , G01N27/26 , B01K5/00 , G01N27/28
CPC分类号： G01N27/44721
摘要： The invention is in concern of a method for measuring the electrophoretic mobility of particles in a liquid test sample in order to improve the precision of the electrophoretic measurement and to reduce in particular the operational expenditures in such a method.By use of considerably simple means a very precise time measurement of the mobility of particles is obtained free from any subjective influences with respect to the selection of the particles to be evaluated and to the time measurement. Accordingly, signals variable with respect to their frequency and visualized on the screen of a monitor are derived from out of video synchronization pulses, said signals are logically combined to the digitalized adjustable image scanning signals, improved in their signal-to-noise ratio.The output signals of this combination effect a counting operation dependent on the particle mobility.
摘要翻译：本发明涉及一种用于测量液体测试样品中的颗粒的电泳迁移率的方法，以提高电泳测量的精度并且特别地降低这种方法中的操作支出。通过使用相当简单的手段，可以获得关于颗粒的移动性的非常精确的时间测量，而不考虑关于要评估的颗粒的选择和时间测量的任何主观影响。因此，从视频同步脉冲中导出关于它们的频率变化并在监视器的屏幕上可视化的信号，所述信号被逻辑地组合到数字化可调图像扫描信号，其信噪比得到改善。该组合的输出信号根据粒子的移动性而影响计数操作。

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