公开(公告)号：US5032826A

公开(公告)日：1991-07-16

申请号：US368102

申请日：1989-06-19

Applicant: Robert C. Miller ,  Michael Twerdochlib

Inventor： Robert C. Miller ,  Michael Twerdochlib

IPC: G01R31/34

CPC classification number: G01R31/34

Abstract: The present invention is a monitor that detects generator core 12 hot spots where the insulation between ferromagnetic sheets is breaking down by monitoring rotor 10 shaft voltage. The difference between the differential shaft voltage at each end of the rotor 14 produces a voltage signal that changes as the core 12 malfunctions. By comparing signal samples over time, core failure can be detected. Spring loaded rotor shaft brushes 20 and 22 connected to differential isolation amplifiers 24 and 26 obtain the voltage between ends 16 and 18 of the rotating shaft and nearby frame, and a differential amplifier 28 produces the difference between the shaft end differential voltages which is the shaft dissymmetry voltage. An analog-to-digital converter 30 produces digital values of the dissymmetry voltage which can be converted into a voltage frequency spectrum by a Fourier Transform routine executed by a computer 32 or analyzed directly. The computer 32 monitors the spectrum or time domain signal over time for changes and produces an alarm when the changes exceed a threshold. Bandpass filters 34 and a simple threshold comparison routine or analog threshold devices can substitute for the FFT routine.

Abstract translation: 本发明是通过监测转子10轴电压来检测发电机铁芯12的热点，其中铁磁性薄片之间的绝缘被分解。 转子14的每端的差动轴电压之间的差产生随着铁心12发生故障而变化的电压信号。 通过随时间比较信号样本，可以检测到核心故障。 连接到差分隔离放大器24和26的弹簧加载的转子轴电刷20和22获得旋转轴和附近框架的端部16和18之间的电压，并且差分放大器28产生作为轴的轴端差分电压之间的差 不对称电压。 模拟 - 数字转换器30产生不对称电压的数字值，其可以通过由计算机32执行的傅里叶变换程序转换成电压频谱或直接分析。 计算机32随时间监视频谱或时域信号以进行改变，并且当改变超过阈值时产生警报。 带通滤波器34和简单的阈值比较程序或模拟阈值装置可替代FFT程序。

公开(公告)号：US08683866B2

公开(公告)日：2014-04-01

申请号：US13191711

申请日：2011-07-27

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01H11/00 ,  G01N29/00

CPC classification number: G01H1/003 ,  G01H1/08

Abstract: A method of matching sensors in a multi-probe blade vibration monitor for a turbine. The method includes providing at least two probes mounted in a casing of the turbine adjacent to a rotating blade structure of the turbine. Targets are provided on radially outer portions of the blade structure. Each of the probes includes a sensor generating signals corresponding to target passing events, and a set of synchronous harmonics of the rotational speed of the rotor are produced for each sensor. The position of the sensors is adjusted such that the sets of harmonics of the sensors are substantially matched, indicating that the positions of the sensors are matched.

Abstract translation: 一种用于涡轮机的多探针叶片振动监测器中匹配传感器的方法。 该方法包括提供安装在涡轮机壳体中的至少两个探针，其与涡轮机的旋转叶片结构相邻。 靶设置在叶片结构的径向外部。 每个探头包括产生对应于目标通过事件的信号的传感器，并且为每个传感器产生一组转子的转速的同步谐波。 调整传感器的位置，使得传感器的谐波组合基本匹配，表明传感器的位置匹配。

公开(公告)号：US08645101B2

公开(公告)日：2014-02-04

申请号：US13024496

申请日：2011-02-10

Applicant: Benjamin T. Humphries ,  Evangelos V. Diatzikis ,  Michael Twerdochlib ,  James F. Lau ,  Edward D. Thompson

Inventor： Benjamin T. Humphries ,  Evangelos V. Diatzikis ,  Michael Twerdochlib ,  James F. Lau ,  Edward D. Thompson

IPC: G06F11/30

CPC classification number: G01H13/00

Abstract: A system and method for monitoring the condition of a vibration sensor in a system. Vibrations are received in the system at one or more vibration sensors. Sensor data is output by the vibration sensor(s). The sensor data includes data representative of the vibrations in the system and data representative of a natural frequency of the corresponding vibration sensor. The sensor data output from the vibration sensor(s) is monitored, and upon a change in the data representative of the natural frequency of a vibration sensor, that vibration sensor is flagged.

Abstract translation: 一种用于监测系统中的振动传感器的状态的系统和方法。 在一个或多个振动传感器的系统中接收振动。 传感器数据由振动传感器输出。 传感器数据包括表示系统中的振动的数据和表示相应的振动传感器的固有频率的数据。 监测从振动传感器输出的传感器数据，并且在代表振动传感器的固有频率的数据改变时，该振动传感器被标记。

公开(公告)号：US20130008180A1

公开(公告)日：2013-01-10

申请号：US13177717

申请日：2011-07-07

Applicant: Evangelos V. Diatzikis ,  Hans-Gerd Brummel ,  Michael Twerdochlib

Inventor： Evangelos V. Diatzikis ,  Hans-Gerd Brummel ,  Michael Twerdochlib

IPC: F02C7/00 ,  G01K11/32 ,  G01N21/88

CPC classification number: F01D21/003 ,  F05D2270/804 ,  F23M11/04 ,  F23R3/002 ,  F23R2900/00019 ,  G01M11/085

Abstract: A component sensing system for monitoring the condition of ceramic tiles in a combustion chamber of a gas turbine engine. The sensing system includes an optical fiber that is mounted to the component being monitored, for example, the ceramic tiles in the gas turbine combustion chamber. The optical fiber can be formed in any suitable orientation or configuration, such as a meandering or serpentine orientation. The fiber is optically coupled to a Brillouin signal analyzer that provides an optical pulse to the sensing section of the fiber and detects Brillouin backscattering from the fiber as the pulse travels along the fiber. The frequency of the Brillouin backscattering signal is monitored relative to the distance along the sensing section of the fiber. A rise in temperature at a location of the fiber shows up in the analyzer as an increase in frequency of the backscattered signal.

Abstract translation: 一种用于监测燃气涡轮发动机的燃烧室中的瓷砖状态的部件感测系统。 感测系统包括安装到被监测的部件的光纤，例如燃气轮机燃烧室中的陶瓷瓦。 光纤可以以任何合适的取向或构型形成，例如曲折或蛇形取向。 光纤光耦合到布里渊信号分析仪，其向光纤的感测部分提供光脉冲，并且随着脉冲沿着光纤行进，从光纤检测布里渊后向散射。 布里渊后向散射信号的频率相对于沿着光纤的感测部分的距离被监测。 随着反向散射信号频率的增加，光纤位置的温度上升在分析仪中出现。

公开(公告)号：US08192077B2

公开(公告)日：2012-06-05

申请号：US12574096

申请日：2009-10-06

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01J5/02

CPC classification number: G01J5/0003 ,  G01J5/524 ,  G01J5/602 ,  G01J2005/0074

Abstract: A method for measuring the differential emissivity between two sites on the surface of a body and the temperature of the two sites. The method includes a plurality of measurements of the infrared radiation arising from each of the two sites under a number of different conditions. Some of the measurements include irradiation by external infrared radiation at a known wavelength and intensity. The infrared radiation arising from each of the sites may include emitted radiation, reflected ambient radiation, and reflected external radiation. Additionally, the temperature determined using the method described can be used to calibrate infrared imaging devices used to inspect the entire body.

Abstract translation: 一种用于测量身体表面两个位置与两个部位的温度之间的差异发射率的方法。 该方法包括在多个不同条件下从两个位置中的每一个产生的红外辐射的多个测量。 一些测量包括以已知波长和强度的外部红外辐射照射。 从每个地点产生的红外辐射可能包括发射的辐射，反射的环境辐射和反射的外部辐射。 另外，使用所述方法确定的温度可用于校准用于检查整个身体的红外成像装置。

公开(公告)号：US20110277535A1

公开(公告)日：2011-11-17

申请号：US13191711

申请日：2011-07-27

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01N29/00

CPC classification number: G01H1/003 ,  G01H1/08

Abstract: A method of matching sensors in a multi-probe blade vibration monitor for a turbine. The method includes providing at least two probes mounted in a casing of the turbine adjacent to a rotating blade structure of the turbine. Targets are provided on radially outer portions of the blade structure. Each of the probes includes a sensor generating signals corresponding to target passing events, and a set of synchronous harmonics of the rotational speed of the rotor are produced for each sensor. The position of the sensors is adjusted such that the sets of harmonics of the sensors are substantially matched, indicating that the positions of the sensors are matched.

Abstract translation: 一种用于涡轮机的多探针叶片振动监测器中匹配传感器的方法。 该方法包括提供安装在涡轮机壳体中的至少两个探针，其与涡轮机的旋转叶片结构相邻。 靶设置在叶片结构的径向外部。 每个探头包括产生对应于目标通过事件的信号的传感器，并且为每个传感器产生一组转子的转速的同步谐波。 调整传感器的位置，使得传感器的谐波组合基本匹配，表明传感器的位置匹配。

公开(公告)号：US07775114B2

公开(公告)日：2010-08-17

申请号：US11861532

申请日：2007-09-26

Applicant: Michael Twerdochlib ,  John F. DeMartini

Inventor： Michael Twerdochlib ,  John F. DeMartini

IPC: G01N29/00

CPC classification number: G01H1/003

Abstract: A method of monitoring vibrations in a blade structure of a turbine including generating signals from a sensor located adjacent to a radial outer edge of the blade structure to sense passage of targets located on the blade structure. The sensor is mounted eccentrically and the signals are obtained with the sensor located at different angular positions. In a first aspect of the invention, the signals from the sensor are used to determine a target slope angle of a target on a first turbine blade during operation of the turbine. In a second aspect of the invention, the signals from the sensor are used to position the sensor in response to a sensed variation in the axial position of the target on the first turbine blade.

Abstract translation: 一种监测涡轮机叶片结构中的振动的方法，包括从位于叶片结构的径向外边缘附近的传感器产生信号，以感测位于叶片结构上的目标的通过。 传感器偏心安装，传感器位于不同角度位置时获得信号。 在本发明的第一方面，来自传感器的信号用于在涡轮机运行期间确定目标在第一涡轮叶片上的目标倾斜角。 在本发明的第二方面，来自传感器的信号用于响应于目标在第一涡轮叶片上的轴向位置的感测变化来定位传感器。

公开(公告)号：US07654145B2

公开(公告)日：2010-02-02

申请号：US11862752

申请日：2007-09-27

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01M13/00 ,  G01H17/00 ,  G01M19/00

CPC classification number: G01H1/06 ,  G01H1/003

Abstract: A method of measuring vibration in a bladed rotor structure with a vibration monitor. The vibration monitor includes a sensor for sensing passage of the sensor targets on radially outer portions of the blade structure, and the sensor generates signals corresponding to target passing events. An excitation structure is provided including at least one air jet for providing an excitation force to the blade structure. The blade structure is rotated about an axis of rotation and the air jet is driven in a circular path about the axis of rotation at a different rotational speed to apply a non-synchronous excitation force to the blade structure.

Abstract translation: 用振动监测器测量叶片转子结构中的振动的方法。 振动监测器包括用于感测传感器目标在叶片结构的径向外部上的通过的传感器，并且传感器产生对应于目标通过事件的信号。 提供了一种激励结构，其包括用于向叶片结构提供激励力的至少一个空气喷射。 叶片结构围绕旋转轴线旋转，并且空气射流以不同旋转速度的旋转轴线以圆形路径驱动，以将不同步的激励力施加到叶片结构。

公开(公告)号：US20100014555A1

公开(公告)日：2010-01-21

申请号：US12574096

申请日：2009-10-06

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01J5/00

CPC classification number: G01J5/0003 ,  G01J5/524 ,  G01J5/602 ,  G01J2005/0074

Abstract: A method for measuring the differential emissivity between two sites on the surface of a body and the temperature of the two sites. The method includes a plurality of measurements of the infrared radiation arising from each of the two sites under a number of different conditions. Some of the measurements include irradiation by external infrared radiation at a known wavelength and intensity. The infrared radiation arising from each of the sites may include emitted radiation, reflected ambient radiation, and reflected external radiation. Additionally, the temperature determined using the method described can be used to calibrate infrared imaging devices used to inspect the entire body.

Abstract translation: 一种用于测量身体表面两个位置与两个部位的温度之间的差异发射率的方法。 该方法包括在多个不同条件下从两个位置中的每一个产生的红外辐射的多个测量。 一些测量包括以已知波长和强度的外部红外辐射照射。 从每个地点产生的红外辐射可能包括发射的辐射，反射的环境辐射和反射的外部辐射。 另外，使用所述方法确定的温度可用于校准用于检查整个身体的红外成像装置。

公开(公告)号：US07379632B1

公开(公告)日：2008-05-27

申请号：US11711824

申请日：2007-02-27

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G02B6/34

CPC classification number: G01B11/18 ,  G02B6/02171

Abstract: An optical measurement device for measuring strain related to deformation of a deformable surface of a component. The optical measurement device includes a fiber tension structure including opposing longitudinal end sections attached to the deformable surface. An optical fiber is tensioned by the fiber tension structure and includes a section defining a Bragg grating. The fiber tension structure includes a displaceable portion for forming a structural break between the longitudinal end sections where the fiber tension structure separates to form a gap between the first and second longitudinal end sections. The longitudinal end sections are movable independently of each other after formation of the structural break in the fiber tensioning structure.

Abstract translation: 一种用于测量与部件的可变形表面的变形有关的应变的光学测量装置。 光学测量装置包括纤维张力结构，其包括附接到可变形表面的相对的纵向端部。 光纤被纤维张力结构张紧并且包括限定布拉格光栅的部分。 纤维张力结构包括可移动部分，用于在纵向端部之间形成结构断裂，其中纤维张力结构分离以在第一和第二纵向端部之间形成间隙。 在纤维张紧结构中形成结构断裂之后，纵向端部彼此独立地移动。