公开(公告)号：WO2001038839A1

公开(公告)日：2001-05-31

申请号：PCT/US2000031303

申请日：2000-11-15

Applicant: CIDRA CORPORATION

Inventor： CIDRA CORPORATION ,  BELLEMORE, David, G. ,  FOURNIER, David, R. ,  DAVIS, Michael, A.

IPC: G01K7/24

CPC classification number: G01K7/245

Abstract: A temperature measurement circuit includes a switched sensing circuit and measures alternately a characteristic of the switched sensing circuit that depends on a thermistor and on a reference resistor, using common electrical components, including a multi-pole switch. The resistance of the thermistor varies with temperature over a known temperature range, and the resistance of the reference resistor remains substantially fixed over the range of temperatures being measured. The temperature measurement circuit also includes a detection circuit. The switched sensing circuit responds to a temperature to be measured, and also responds to a detection circuit sitich control signal. It provides switched sensing circuit signals containing information about the characteristic of the sensing circuit with the thermistor and the reference resistor, in turn, switched into the circuit. The detection circuit provides the detection circuit switch control signal, and responds to the switched sensing circuit signals. It provides a detection circuit signal containing information about the temperature to be measured. In one embodiment, the common set of electrical components includes a capacitor connected in series with a multi-pole switch in the switched sensing circuit and a comparator in the detection circuit. In another embodiment, the switched sensing circuit is a (switched) resistance-tunable oscillating circuit.

Abstract translation: 温度测量电路包括开关感测电路，并且使用包括多极开关的公共电气部件交替地测量取决于热敏电阻和参考电阻的开关感测电路的特性。 热敏电阻的电阻随温度在已知温度范围内变化，参考电阻的电阻在被测量的温度范围内基本保持固定。 温度测量电路还包括检测电路。 开关感测电路响应要测量的温度，并且还响应检测电路控制信号。 它提供开关感测电路信号，其中包含有关热敏电阻和参考电阻的感测电路的特性的信息，然后又转换成电路。 检测电路提供检测电路开关控制信号，并响应切换的感测电路信号。 它提供一个包含有关待测温度的信息的检测电路信号。 在一个实施例中，共同的电气部件组包括与开关感测电路中的多极开关串联连接的电容器和检测电路中的比较器。 在另一实施例中，开关感测电路是（开关）电阻可调谐振荡电路。

公开(公告)号：WO2004082174A1

公开(公告)日：2004-09-23

申请号：PCT/US2004/007644

申请日：2004-03-11

Applicant: CiDRA CORPORATION

Inventor： SIRKIS, James, S. ,  MOON, John, A. ,  JONES, Ralph ,  WINSTON, Charles, R. ,  FOURNIER, David, R. ,  PINTO, Joseph ,  BRUCATO, Robert, N. ,  DUNPHY, James, R. ,  CHESTNUT, Christopher, J.

IPC: H04B10/08

CPC classification number: G01J3/18 ,  G01J3/0202 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0256 ,  G01J3/0291 ,  G01J3/06

Abstract: An optical spectrum analyzer (OSA) (10) sequentially or selectively samples (or filters) a spectral band(s) (11) of light from a broadband optical input signal (12) and measures predetermined optical parameters of the optical signal (e.g., spectral profile) of the input light (12). The OSA (10) is a free-space optical device that includes a collimator assembly (15), a diffraction grating (20) and a mirror (22). A launch pigtail emits into free space the input signal through the collimator assembly (15) and onto the diffraction grating (20), which separates or spreads spatially the collimated input light, and reflects the dispersed light onto the mirror (22). A N4 plate (26) is disposed between the mirror 22 and the diffraction grating (20). The mirror reflects the separated light back through the N4 plate (26) to the diffraction grating (20), which reflects the light back through the collimating lens (18). The lens (18) focuses spectral bands of light (η 1- η N ) at different focal points in space. One of the spectral bands (11) is focused onto a receive pigtail (28), which then propagates to a photodetector (30). A pivoting mechanism (34) pivots the diffraction grating 20 or mirror (22) about a pivot point (36) to sequentially or selectively focus each spectral band (11) to the receive pigtail (28). A position sensor (42) detects the displacement of the diffraction grating (24) or mirror.

Abstract translation: 光谱分析仪（OSA）（10）顺序地或选择性地从宽带光输入信号（12）中采样（或滤波）光谱带（11），并且测量光信号的预定光学参数（例如， 输入光（12）的光谱分布）。 OSA（10）是包括准直器组件（15），衍射光栅（20）和反射镜（22）的自由空间光学装置。 发射尾纤通过准直器组件（15）将输入信号发射到自由空间中，并在衍射光栅（20）上分离或扩展空间上准直的输入光，并将分散的光反射到反射镜（22）上。 N4板（26）设置在反射镜22和衍射光栅（20）之间。 反射镜通过N4板（26）将分离的光反射回衍射光栅（20），其通过准直透镜（18）反射光。 透镜（18）在空间中的不同焦点处聚焦光的光谱带（eta1-etaN）。 光谱带（11）中的一个聚焦在接收引线（28）上，然后传输到光电检测器（30）。 枢转机构（34）围绕枢转点（36）枢转衍射光栅20或反射镜（22），以顺序地或选择性地将每个光谱带（11）聚焦到接收尾纤（28）。 位置传感器（42）检测衍射光栅（24）或反射镜的位移。

公开(公告)号：WO2003016926A1

公开(公告)日：2003-02-27

申请号：PCT/US2002/025305

申请日：2002-08-08

Applicant: CIDRA CORPORATION

Inventor： BELLEMORE, David, G. ,  FOURNIER, David, R. ,  DAVIS, Michael, A.

IPC: G01R19/25

CPC classification number: G01R19/04 ,  G01L1/246 ,  G01R19/2509

Abstract: A method and corresponding apparatus for determining the centroid (V c ) of a waveform signal being sampled at a set of parameter values (V i , i=1, ..., n) yielding a corresponding set of sampled amplitudes (A i , i=1, ..., n), each parameter value and corresponding amplitude forming a sampled point (V i , A i ), the method including the steps of: selecting an amplitude at which to create an interpolated point; interpolating a first parameter value corresponding to the amplitude selected in the step of selecting an amplitude; and performing a centroid calculation using only the sampled points with an amplitude greater than a predetermined threshold. The waveform is sometimes sampled in the presence of background noise, and the method sometimes also includes: estimating the background (B i ) for each value in the set of parameter values at which sampling is performed; and reducing the amplitude (A i ) of each sampled amplitude by the background (B i ) so estimated.

Abstract translation: 一种用于确定在一组参数值（Vi，i = 1，...，n）上采样的波形信号的质心（Vc）的方法和相应装置，产生一组相应的采样幅度（Ai，i = 1 ，...，n），每个参数值和对应的振幅形成采样点（Vi，Ai），所述方法包括以下步骤：选择创建内插点的幅度; 内插与在选择幅度的步骤中选择的幅度对应的第一参数值; 以及仅使用振幅大于预定阈值的采样点进行质心计算。 有时在有背景噪声的情况下采样波形，并且该方法有时还包括：对进行采样的参数值集合中的每个值估计背景（Bi）; 并且将每个采样振幅的振幅（Ai）减小所估计的背景（Bi）。