公开(公告)号：US20060237416A1

公开(公告)日：2006-10-26

申请号：US11093126

申请日：2005-03-29

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: H05B11/00 ,  H05B1/00 ,  H05B3/00

CPC classification number: H05B1/0213

Abstract: In some instances, ice can form on the surface of a compressor airfoil. If the ice dislodges, it can impact and damage other compressor components. Aspects of the invention relate to systems for detecting the presence of ice or water on a compressor vane during engine operation. A ceramic insulating coating can be deposited on a portion of the surface of the vane. A heater and a thermocouple can be provided near the outermost surface of the coating such that the thermocouple can sense heat from the heater. The heater and the thermocouple can be provided within the coating. The presence of water film and/or ice on the coating surface can be detected by taking a thermocouple measurement following a heater pulse. The presence of a water film or ice results in a delay in the temperature rise detected by the thermocouple.

Abstract translation: 在某些情况下，冰可以形成在压缩机翼面的表面上。 如果冰块移动，它可能会影响和损坏其他压缩机组件。 本发明的方面涉及用于在发动机操作期间检测压缩机叶片上的冰或水的存在的系统。 陶瓷绝缘涂层可以沉积在叶片表面的一部分上。 可以在涂层的最外表面附近提供加热器和热电偶，使得热电偶可以感测来自加热器的热量。 加热器和热电偶可以在涂层内提供。 可以通过在加热器脉冲之后进行热电偶测量来检测涂层表面上的水膜和/或冰的存在。 水膜或冰的存在导致热电偶检测到的温度上升延迟。

公开(公告)号：US07123031B2

公开(公告)日：2006-10-17

申请号：US11018771

申请日：2004-12-20

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01R27/08 ,  G01N27/00

CPC classification number: G01B7/18 ,  G01N2203/0664

Abstract: Aspects of the invention relate to a system for assessing the condition of a thermal barrier coating on a turbine vane during engine operation. According to embodiments of the invention, one or more wires can be passed along the airfoil portion of the vane. The wires can extend over, within, or beneath the thermal coating. An electrical current can be passed along the wires, and electrical resistance can be measured across the wires. Thus, if a portion of the thermal coating becomes damaged, then the wires located in that area may break. A disconnect in the wires can lead to an increase in resistance across the wires, which can alert an operator to a problem. Some assessment systems can provide a general indication of the magnitude of damage and whether the damage is spreading.

公开(公告)号：US6094989A

公开(公告)日：2000-08-01

申请号：US138187

申请日：1998-08-21

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01N29/07 ,  G01N29/14 ,  G01N29/46 ,  G01N29/00

CPC classification number: G01N29/14 ,  G01N29/07 ,  G01N29/46 ,  G01N2291/015 ,  G01N2291/2693

Abstract: Non-synchronous vibrations in blades on a rotating wheel, such as a turbine wheel, are measured using Fourier analysis adjusted to correct for uneven sampling produced by a pair of probes spaced from each other about the wheel by a probe angle (PA) other than 180.degree.. The Fourier transform matrix is phase shifted by an amount which is a function of the PA which is other than 180.degree., and the harmonic in which the mode of non-synchronous vibration is expected to be found. A scaling factor in the form of an inverse correction factor is applied to the frequency spectra produced by the phase shifted Fourier transform matrix to generate an output representative of the frequency and amplitude of the true excitation frequency which can be presented on a display.

Abstract translation: 使用傅立叶分析来测量旋转轮上的叶片（例如涡轮机轮）中的非同步振动，以校正由围绕车轮相互间隔的一对探针产生的不均匀采样，除了除了 180度。 傅里叶变换矩阵相位移是除了180度以外的PA的函数的量以及期望发现非同步振动模式的谐波。 将逆校正因子形式的缩放因子应用于由相移傅立叶变换矩阵产生的频谱，以产生表示可以在显示器上呈现的真实激发频率的频率和幅度的输出。

公开(公告)号：US5152309A

公开(公告)日：1992-10-06

申请号：US706912

申请日：1991-05-29

Applicant: Michael Twerdochlib ,  David E. Bateman

Inventor： Michael Twerdochlib ,  David E. Bateman

IPC: G01F1/00 ,  G05D7/06

CPC classification number: G05D7/0635 ,  Y10T137/0357 ,  Y10T137/7759 ,  Y10T137/7761

Abstract: The present invention provides a valve control apparatus which can be programmed to deliver a desired flow of gas. A valve 22 is connected to a stepper motor 28 which is controlled by a computer 32 to open or close the valve in steps within a gas flow line 24 to deliver a desired rate of flow. A flowmeter 30 is provided along the gas flow line 24 for measuring the flow and inputting this flow to the computer 32. The computer 32 calculates rate of flow information obtained from the flowmeter 30 and controls the stepper motor 28 to open or close the valve 22 as necessary in accordance with the received rate of flow information and a desired rate of flow preprogrammed into the computer 32. As a result, a precise desired rate of flow can be obtained. Also, position indicators 34 may be added to the valve 22 to indicate when the valve 22 is completely open or completely closed. The valve 22 may be provided with a return spring 36 to automatically close the valve 22 in the event of a power loss. The computer 32 may be programmed to detect a significant increase in the rate of gas flow being closing the valve 22 accordingly. Additionally, a pressure switch 38 may be provided along the gas flow line 24 to cause the valve 22 to close upon a pressure change. Finally, temperature 40 and pressure 42 sensors may be added along the gas flow line so that the computer 32 can calculate and maintain a specific mass flow of gas.

Abstract translation: 本发明提供了一种阀控制装置，其可编程为输送期望的气体流。 阀门22连接到步进马达28，步进马达28由计算机32控制，以在气体流动管线24内逐步打开或关闭阀门，以输送所需的流量。 沿着气体流路24设置流量计30，用于测量流量并将该流量输入到计算机32.计算机32计算从流量计30获得的流量信息，并控制步进马达28打开或关闭阀22 根据所接收的流量信息和预编程到计算机32中的期望流量，根据需要，可以获得精确的期望流量。 此外，位置指示器34可以被添加到阀22以指示阀22何时完全打开或完全关闭。 阀22可以设置有复位弹簧36，以在功率损失的情况下自动关闭阀22。 计算机32可以被编程为检测相应地关闭阀门22的气体流量的显着增加。 另外，压力开关38可以沿着气体流动管线24设置，以使得阀22在压力变化时闭合。 最后，温度40和压力42传感器可以沿着气体流动管线被添加，使得计算机32可以计算和维持气体的特定质量流量。

公开(公告)号：US5033305A

公开(公告)日：1991-07-23

申请号：US462506

申请日：1990-01-08

Applicant: Paul F. Rozelle ,  Michael Twerdochlib

Inventor： Paul F. Rozelle ,  Michael Twerdochlib

IPC: G01H1/10 ,  G01H1/00 ,  G01M15/04 ,  G01M99/00 ,  G07C3/00

CPC classification number: G01M15/046 ,  G01H1/003 ,  G07C3/00 ,  F02D2200/1015

Abstract: The movement of a rotating part of a machine is monitored by deriving a signal representing the motion of the rotating part, at least temporarily storing the derived signal, and analyzing the stored signal, with temporary storage being performed only on portions of the signal derived during spaced time intervals during each revolution of the rotating part.

Abstract translation: 通过导出表示旋转部分的运动的信号来监测机器的旋转部分的运动，至少暂时存储导出的信号，并且分析所存储的信号，其中暂时存储仅在所导致的信号的部分上被执行 在旋转部件的每转期间间隔时间间隔。

公开(公告)号：US5031459A

公开(公告)日：1991-07-16

申请号：US349029

申请日：1989-05-08

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01B21/22 ,  F01D21/00 ,  G01H1/10

CPC classification number: G01H1/10

Abstract: A shaft torsion monitor comprises a plurality of sensors for sensing the angular position of various portions of the shaft under dynamic conditions and for producing sets of data representative of the sensed angular positions. A memory is provided for periodically storing one of the sets of data representative of the angular position of the various portions of the shaft in the absence of torsion. Circuitry is provided for subtracting the stored set of data from each of the other sets of data to eliminate the effects of noise. The resulting data is analyzed to determine the torsion experienced by the shaft.

Abstract translation: 轴扭转监视器包括多个传感器，用于在动态条件下感测轴的各个部分的角位置并且用于产生表示所感测的角位置的数据组。 提供存储器，用于在不存在扭转的情况下周期性地存储表示轴的各个部分的角位置的数据组之一。 提供电路，用于从每个其他数据集中减去存储的数据集，以消除噪声的影响。 分析得到的数据以确定轴经受的扭转。

公开(公告)号：US4987555A

公开(公告)日：1991-01-22

申请号：US277833

申请日：1988-11-30

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01B7/14

CPC classification number: G01B7/14

Abstract: A system for monitoring the clearance between a plurality of turbine blade shroud segments connected to form a turbine blade shroud and the stationary portion of the turbine comprises a sensor responsive to eddy currents generated in each of the shroud segments for producing input signals representative of the clearance between each shroud segment and the stationary portion of the turbine. Indicia are carried by the turbine blade shroud for causing the sensor to produce a known displacement signal. A processor is responsive to the input signals and the displacement signal for producing output signals indicative of the clearance between each shroud segment and the stationary portion of the turbine. The output signals have a predetermined relationship to the known displacement signal.

Abstract translation: 用于监测连接以形成涡轮机叶片护罩的多个涡轮机叶片护罩段与涡轮机的固定部分之间的间隙的系统包括响应于在每个护罩段中产生的涡流的传感器，用于产生代表间隙的输入信号 在每个护罩段和涡轮机的固定部分之间。 标记由涡轮机叶片护罩承载，以使传感器产生已知的位移信号。 处理器响应于输入信号和位移信号，用于产生指示每个护罩区段和涡轮机的静止部分之间的间隙的输出信号。 输出信号与已知的位移信号具有预定的关系。

公开(公告)号：US4951500A

公开(公告)日：1990-08-28

申请号：US385753

申请日：1989-07-26

Applicant: Michael Twerdochlib ,  Robert L. Osborne ,  Paul F. Rozelle

Inventor： Michael Twerdochlib ,  Robert L. Osborne ,  Paul F. Rozelle

IPC: F01D21/00 ,  G01B7/14 ,  G01B7/28 ,  G01H1/00

CPC classification number: G01B7/285 ,  F01D21/003 ,  G01B7/14 ,  G01H1/006

Abstract: A method of determining the untwist of turbine blades under dynamic conditions is comprised of the steps of producing a first pair of blade passing event signals in response to a blade tip's movement past a pair of fixed sensors. The signals comprising the first signal pair are compared to one another to establish a first differential value. Another data point containing blade vibrational information is produced. The first differential value and the other data point are evaluated to discriminate between blade untwist and synchronous vibration. Based on the magnitude of the blade untwist, inferences can be drawn regarding the status of the turbine blade lashing wires.

Abstract translation: 在动态条件下确定涡轮叶片解捻的方法包括以下步骤：响应于叶片尖端的运动经过一对固定传感器产生第一对叶片通过事件信号。 将包括第一信号对的信号彼此进行比较以建立第一差分值。 产生了包含叶片振动信息的另一个数据点。 评估第一个微分值和另一个数据点，以区分刀片解捻和同步振动。 基于叶片解捻度的大小，可以得出关于涡轮机叶片绑扎丝的状态的推断。

公开(公告)号：US4901061A

公开(公告)日：1990-02-13

申请号：US196707

申请日：1988-05-20

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01K1/08 ,  G01K3/14

CPC classification number: G01K3/14 ,  G01K1/08

Abstract: Instrumentation and monitoring systems utilize, as differential temperature sensors, heated, split-well thermowells of duplex design, mounted to the sidewall of a pressure vessel and communicating through a penetration in the sidewall with the fluid state within the vessel. Each probe has at least one parallel axial bore therein, a related, selected pair of probes receiving respective heater and temperature sensing elements in the associated bores and together functioning as a differential temperature sensor producing distinguishable, differential temperature outputs representative of the presence of steam versus water. The systems monitor the differential temperature outputs of plural such sensors to produce alarm indications and perform verification and error checking of the sensor output indications. Duplex sensor embodiments permit toggling between different, selected such pairs of probes for on-line testing and verification of monitored conditions represented by the sensor output indications and of the operability of the elements and supporting circuits, under automatic and manual controls, and with on-line substitution of complementary elements in the event of element failure.

Abstract translation: 仪器和监测系统作为差分温度传感器使用双重设计的加热分裂井热套管，安装在压力容器的侧壁上，并通过容器内的流体状态穿过侧壁进行连通。 每个探针在其中具有至少一个平行的轴向孔，相关的选定的一对探头在相关联的孔中接收相应的加热器和温度感测元件，并且一起用作差分温度传感器，产生可区分的差示温度输出，代表蒸汽的存在与 水。 系统监控多个这种传感器的差分温度输出，以产生报警指示，并执行传感器输出指示的验证和错误检查。 双相传感器实施例允许在不同的所选择的这种探针对之间切换，用于在自动和手动控制下在线测试和验证由传感器输出指示表示的监测条件以及元件和支持电路的可操作性， 在元件故障的情况下补充元素的线代替。

公开(公告)号：US4875373A

公开(公告)日：1989-10-24

申请号：US223307

申请日：1988-07-25

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01H9/00 ,  G01B5/00 ,  G01D5/34

CPC classification number: G01D5/34 ,  G01B5/0014 ,  Y10S359/90

Abstract: A light beam altering grid (20), having a graded slit density pattern (22), is mounted on a temperature responsive support structure (23) to traverse a light beam (28). The slit density (slit per unit length) of the grid (20) is greater at one end of the grid (20) and gradually reduces towards the opposite end of the grid (20). The grid (20) is disposed on a thermally responsive support (23) such as a bimetallic cantilever (23). The thermally responsive support (23) operates to bend by an amount dependent upon the temperature of the environment in which it operates. In this manner, the grid (20) disposed on the thermally responsive support (23) is positioned in dependence upon the environmental temperature. The grid (20) may be arranged, for example, such that at higher environmental temperatures, when the natural frequency of the support (23) is reduced, the grid (20) will be positioned such that the change in density of slit graduations intersecting the light beam (28) compensates for change in the vibration amplification factor of the bimetalic cantilever (23) caused by the elevated environmental temperature.

Abstract translation: 具有分级狭缝密度图案（22）的光束改变格栅（20）安装在温度响应支撑结构（23）上以穿过光束（28）。 格栅（20）的狭缝密度（每单位长度的狭缝）在网格（20）的一端较大，并朝向网格（20）的相对端逐渐减小。 栅格（20）设置在诸如双金属悬臂（23）的热响应支撑件（23）上。 热响应支架（23）的作用是弯曲一定量，取决于其工作环境的温度。 以这种方式，设置在热响应支撑件（23）上的格栅（20）根据环境温度定位。 格栅（20）可以例如布置成使得在较高的环境温度下，当支撑件（23）的固有频率减小时，栅格（20）将被定位成使得狭缝刻度的密度变化相交 光束（28）补偿由环境温度升高引起的双金属悬臂（23）的振动放大系数的变化。