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1. 发明授权

US5995207A Method for determining the phase difference of light waves propagated over two paths 失效
标题翻译：用于确定在两条路径上传播的光波的相位差的方法
公开(公告)号：US5995207A
公开(公告)日：1999-11-30
申请号：US979162
申请日：1997-11-26
申请人： David B. Hall , Donald A. Frederick , James B. Bunn , James S. Bunn, Jr.
发明人： David B. Hall , Donald A. Frederick , James B. Bunn , James S. Bunn, Jr.
IPC分类号： G01J9/00 , G01C3/08 , G01B9/02
CPC分类号： G01J9/00
摘要： The invention is a method for obtaining a measure of the light propagation time difference for two light-propagating-media paths. The first step consists of generating two substantially-identical frequency-modulated light waves whereby the frequency of the light waves is offset from a reference frequency by a different frequency increment for each basic time interval in each of a plurality of groups of three or more basic time intervals. Each frequency increment is the sum of a specified increment and a frequency-modulation-error increment. The frequency-modulation-error increments associated with the specified increments are independent of each other and unknown. The second step consists of feeding the two light waves into the entry points of two light-propagating-media paths having a light propagation time difference and obtaining a combination light wave by summing the light waves emerging from the exit points of the two light-propagating-media paths. The third step consists of calculating an estimated corrected or estimated uncorrected phase measure of the light propagation time difference for the two paths for a plurality of groups using only measured properties of the combination light wave.
摘要翻译：本发明是一种用于获得两个光传播介质路径的光传播时间差测量的方法。第一步包括产生两个基本上相同的频率调制光波，由此在三个或更多个基本的多个组中的每组中，每个基本时间间隔，光波的频率偏离参考频率不同的频率增量时间间隔。每个频率增量是指定增量和频率调制误差增量之和。与指定增量相关联的频率调制误差增量彼此独立，未知。第二步包括将两个光波馈送到具有光传播时间差的两个光传播介质路径的入口点，并通过将从两个光传播的出射点出射的光波相加获得组合光波媒体路径。第三步包括仅使用组合光波的测量属性来计算多个组的两个路径的光传播时间差的估计校正或估计的未校正相位测量。

2. 发明授权

US5917597A Noise suppression apparatus and method for time division multiplexed fiber optic sensor arrays 失效
标题翻译：用于时分复用光纤传感器阵列的噪声抑制装置和方法
公开(公告)号：US5917597A
公开(公告)日：1999-06-29
申请号：US18774
申请日：1998-02-04
申请人： David B. Hall , James S. Bunn, Jr.
发明人： David B. Hall , James S. Bunn, Jr.
IPC分类号： G01B9/02 , G01D5/353 , G01J9/02
CPC分类号： G01D5/35303 , G01D5/35383
摘要： Leakage optical signals injected into a time division multiplexed sensor system are modulated during off periods in the duty cycle in the sensor interrogation signal. The leakage light is modulated such that its unwanted contributions to the sensor output signals are displaced in frequency from the base band frequency. This frequency displacement greatly reduces unwanted noise power in the received signals.
摘要翻译：注入到时分复用传感器系统中的泄漏光信号在传感器询问信号的占空比的关闭期间进行调制。调制泄漏光，使得其对传感器输出信号的不期望的贡献在频带上从基带频率位移。该频率位移大大减少了接收信号中的不必要的噪声功率。

3. 发明授权

US5283625A Interferometer phase modulation controller apparatus using ratios of two pairs of harmonic signals 失效
标题翻译：干涉仪相位调制控制器装置使用两对谐波信号的比例
公开(公告)号：US5283625A
公开(公告)日：1994-02-01
申请号：US751358
申请日：1991-08-19
申请人： James S. Bunn, Jr.
发明人： James S. Bunn, Jr.
IPC分类号： G01D5/26 , G01B9/02
CPC分类号： G01D5/266
摘要： A phase modulation control apparatus is taught in combination with an interferometer excited by a coherent light source providing a light beam to the interferometer having first and second optical paths. The interferometer senses a physical quantity such as pressure. The interferometer is coupled to provide an optical signal containing information providing a measure of the physical quantity via first and second interfering beams to a detector. The detector provides a composite output signal. The invention phase modulation control apparatus has a modulation means responsive to a modulating frequency signal and a phase modulation control signal to provide a frequency modulating factor signal for frequency modulating at least a portion of the light beam to provide a phase modulation between the first and second interfering beams at a carrier frequency. The composite output signal has at least four harmonic signals referenced to the carrier frequency. A synchronous detection means responsive to the carrier frequency signal and to the composite output signal provides a pair of even harmonic filtered signals and a pair of odd harmonic filtered signals. A reference channel means and quadrature channel means each respond to the even and odd harmonic pairs of filtered signals and respectively provide first and second integrator input error signals which have null values in response to their respective harmonic pairs having a predetermined ratio. An integration means combines and integrates the first and second integrator input error signals to provide the phase modulation control signal to the modulation means.
摘要翻译：相位调制控制装置与由相干光源激励的干涉仪组合教导，该相干光源向具有第一和第二光路的干涉仪提供光束。干涉仪检测物理量如压力。干涉仪被耦合以提供含有信息的光学信号，该信息通过第一和第二干涉光束向检测器提供物理量的测量。检测器提供复合输出信号。本发明的相位调制控制装置具有响应于调制频率信号和相位调制控制信号的调制装置，以提供频率调制因子信号，用于对至少一部分光束进行频率调制，以在第一和第二在载波频率处的干扰波束。复合输出信号具有至少四个参考载波频率的谐波信号。响应于载波频率信号和复合输出信号的同步检测装置提供一对偶次谐波滤波信号和一对奇次谐波滤波信号。参考通道装置和正交通道装置各自响应于滤波信号的偶次和奇数谐波对，并分别提供第一和第二积分器输入误差信号，其响应于具有预定比率的各自的谐波对而具有空值。积分装置组合并积分第一和第二积分器输入误差信号，以向调制装置提供相位调制控制信号。

4. 发明授权

US5039221A Interferometer calibration for fiber optic sensor arrays 失效
标题翻译：光纤传感器阵列的干涉仪校准
公开(公告)号：US5039221A
公开(公告)日：1991-08-13
申请号：US375323
申请日：1989-07-03
申请人： Michael R. Layton , James S. Bunn, Jr.
发明人： Michael R. Layton , James S. Bunn, Jr.
IPC分类号： G01D5/353
CPC分类号： G01D5/35383
摘要： A switch-selectable calibration signal is applied to an interferometric sensor channel of fiber optic sensor array for monitoring its operation. A calibration signal is applied at a single physical location to determine the channel scale factors and proper operability of multiple sensors at remote locations in the array. An optical signal input to each interferometric sensor channel in the array, and a compensating interferometer receives optical signals output from the fiber optic sensor array. A signal is applied to the compensating interferometer to form an output signal that simulates signals output from each interferometric sensor in the array. These signals are processed to determine the scale factor of each interferometer in the fiber optic sensor array.
摘要翻译：开关可选择的校准信号被应用于光纤传感器阵列的干涉传感器通道，用于监视其操作。在单个物理位置应用校准信号以确定阵列中远程位置处的多个传感器的通道比例因子和适当的可操作性。输入到阵列中的每个干涉传感器通道的光信号，以及补偿干涉仪接收从光纤传感器阵列输出的光信号。信号被施加到补偿干涉仪以形成输出信号，该信号模拟阵列中每个干涉测量传感器输出的信号。处理这些信号以确定光纤传感器阵列中每个干涉仪的比例因子。

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