Abstract: Data analysis systems and related methods. An implementation of a method of determining a relationship between a variable of interest and one or more process variables represented by a corresponding plurality of tags may include accessing a data historian including historical data including a variable of interest and a plurality of tags. The method may include defining a plurality of bins, retrieving historical data corresponding with the plurality of bins using the data historian, filtering the historical data for each of the plurality of bins using one or more filters to produce filtered historical data, generating an output display using the filtered historical data for the variable of interest and each of the plurality of tags, and determining which of the plurality of tags correlate with the variable of interest using the output display. The output display may include an overlay CUSUM chart and a correlation plot.

Abstract: An angular position sensor and method that relies on a stationary circular array of Hall sensors and a rotatable circular array of magnets arranged about a common axis. A periodic and simultaneous reading of all of the Hall sensor outputs is used to determine angular velocity.

Abstract: A system and method for controlling the speed of a recirculation pump in an anode recirculation loop of a fuel cell system based on a predetermined ratio of fresh hydrogen to recirculated anode gas. The system uses a model to determine the volume flow of the recirculated gas through a fuel cell stack to determine the recirculation rate based on a measured temperature of the recirculated gas, a measured pressure drop across a recirculation pump, a pressure drop across the anode inlet and outlet of the stack, a percentage of hydrogen in the recirculated gas, and the density of the recirculated gas.

Abstract: Total analysis systems and methods for simultaneously monitoring a suite of biological and/or chemical species in water and/or other process systems are disclosed. The system provides a sample-volume controlled sensor array comprising a fluid delivery device and a plurality of optical sensor elements for determining the presence and total concentrations of multiple analytes in the process system simultaneously. Image identification algorithms are provided for identifying the analytes based on image intensity, color pattern, positional arrangement, and the like. The methods incorporate multivariate optimization algorithms to analyze multiple sensor responses. This produces analytical results that are typically difficult to obtain without full system or variable compensation. The improved array response may then be utilized to measure, monitor, and control the concentration of analytes in the chemical or biological sample or water system.

Abstract: A system and method for determining rotor speed of an AC induction machine is disclosed. The system is programmed to estimate a rotor speed of the induction machine according to a linear speed estimation algorithm and based on name plate information (NPI) of the induction machine and parameters of the AC induction machine during operation thereof. The rotor speed estimation system is also programmed to estimate a rotor speed of the AC induction machine according to a frequency-domain signal processing algorithm and determine if the rotor speed estimated thereby is valid. If the rotor speed estimated by the frequency-domain signal processing algorithm is valid, then a tuned rotor speed of the AC induction machine is estimated according to the linear speed estimation algorithm and based, in part, on the rotor speed estimated by the frequency-domain signal processing algorithm.

Abstract: A method for determining the effects of the wind on a blind (1) or the like that is provided with a sensor means (231) for measuring the effects of the wind in a first measurement direction (X1) and in a second measurement direction (Y1), the two directions being different, the method comprising the following steps: collecting, from the sensor means, a first signal representative of the effects of the wind on the blind or the like, in the first measurement direction; collecting, from the sensor means, a second signal representative of the effects of the wind on the blind or the like, in the second measurement direction; which comprises the step of: processing these signals so as to provide a secondary signal representative of the effects of the wind and independent of the orientation of the sensor means in a plane defined by the two directions, in order to obtain uniform sensor detection sensitivity irrespective of the orientation of the sensor.

Abstract: A method of isolating a frequency in a rotating machine having at least one sensor includes receiving, from the at least one sensor, a sensor signal that includes at least one frequency, converting the sensor signal to a digital vibration signal, modifying the vibration signal to generate an envelope signal, synchronously oversampling the envelope signal to generate a synchronous envelope signal, and transforming the synchronous envelope signal into a frequency spectrum to isolate the frequency.

Abstract: A system and a method for estimating a torque and a rotational speed of a motor are disclosed. The system includes a sound receiving device, a feature extraction device, and an artificial neural network module. In the method, at first, a plurality of training data are provided, wherein the training data includes a plurality of history sound feature values of the motor and history torque values or history rotation values corresponding thereto. Thereafter, an artificial neural network stored in the artificial neural network module is trained by the history data to obtain a motor model of the motor. Then, a motor sound signal made by the motor in a working state is received. Thereafter, sound feature values of the motor sound signal are extracted. Thereafter, the rotational speed value and the torque value are computed by the motor model in accordance with the at least one sound feature value.

Abstract: A signal processing circuit for a rotation detector includes a normal-rotation pulse request holding portion, a reverse-rotation pulse request holding portion, a resetting portion, and a waiting time switching portion. When an output of one of a normal-rotation pulse and a reverse-rotation pulse is finished and a waiting time elapses, the resetting portion resets an output request signal of the one of the normal-rotation pulse and the reverse-rotation pulse held by one of the pulse request holding portions. The waiting time switching portion sets the waiting time to a first waiting time when one of the pulse request holding portions holds the output request signal, and the waiting time switching portion sets the waiting time to a second waiting time longer than the first waiting time when both the pulse request holding portions hold the output request signals.

Abstract: The present invention describes an order tracking system (200) and method (100) for tracking at least one order from mechanical and/or acoustic vibrations generated by a periodic excitation process of a physical system. The order tracking system (200) comprises a means for obtaining (212) a mechanical and/or acoustic vibration data of a physical system and a means for obtaining (214) system reference data. It further comprises a means for combining (224) the mechanical and/or acoustic vibration data with the system reference data and a means for applying (226) a digital FIR filter to at least the mechanical and/or acoustic vibration data for deriving based thereon at least one order.

Abstract: A system and method for detecting the absence of contact between the hands of a driver of a vehicle and a steering wheel of the vehicle that have particular application in ensuring the proper functioning of various components of the driver assist steering systems and maintaining driver attentiveness. The method for detecting a no-contact condition between the hands of the driver of the vehicle and the steering wheel includes generating a model of the no-contact condition using a second-order transfer function. The method further includes obtaining a set of model-generated steering dynamics by estimating a plurality of parameters of the second-order transfer function and a set of measured steering dynamics using a plurality of sensors. The set of model-generated steering dynamics and the set of measured steering dynamics are then compared and the no-contact condition is detected based on this comparison.

Abstract: A method and a device are described for determining the rotational direction and/or rotational speed of a rotatable body on the basis of a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed of the rotatable body and are output by a sensor, having at least one of the following steps: recording a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed, at a point in time; determining a phase value from the sine signal and cosine signal; recording sine signals and cosine signals, which is assignable to the rotational direction and/or rotational speed, at points in time; determining phase values from the corresponding sine signals and cosine signals; calculating phase differences from the phase values and the phase value; and determining the rotational direction and/or rotational speed from the phase differences on the basis of a Vernier method.

Abstract: A method for estimating the moment of inertia of a rotating unit of a washing or washing-and-drying machine comprising the steps of: establishing one or more linear parameters; rotating the drum of the rotating unit in such a way as to reach a set of speeds of a pre-set value; once each speed of a pre-set value is reached, detecting the value of the torque provided to the rotating unit; and finally estimating the moment of inertia of the rotating unit through a linear combination of the torques detected and by means of the linear parameters.

Abstract: A computer method or corresponding system for optimally balancing a rotor assembly. The computer system defines a theoretical centerline based on a mathematical model of the rotor assembly. For each disc or component of the rotor assembly, the invention system calculates rotor blade or bolt and washer distribution, based on calculated centerline deviations and angular locations of the discs and effective weights of rotor blade or bolt-and-washer sets. The rotor blade or bolt-and-washer distribution provides locations for placement of the rotor blades or bolts-and-washers so as to offset the centerline deviations and thus correct imbalance of the rotor assembly.

Abstract: An apparatus for detecting a reversion of direction of a relative movement between a periodic scale for defining a periodic field and a field sensor. The field sensor outputs first and second sensor signals. The first sensor signal is advanced from the second sensor signal if the periodic field moves in a first direction. The second sensor signal is advanced from the first sensor signal if the periodic field moves in a second direction. A determiner determines the difference between the first sensor signal and a signal corresponding to a temporal change of the second sensor signal or between the second sensor signal and a signal corresponding to a temporal change of the first sensor signal.

Abstract: An apparatus for measuring dynamic rigidity of a main shaft of a machine tool with high accuracy. The apparatus includes an unbalanced master that is attached to the main shaft and of which position of a center of gravity is offset with respect to a center of rotation of the main shaft; a tachometer that measures a rotational speed of the main shaft; and a run-out amount measuring device that is positioned so as to face the unbalanced master at a predetermined position in an axial direction and is any given position in a circumferential direction, and that measures an amount of run-out of the unbalanced master. The dynamic rigidity of the main shaft is calculated based on a relation between the rotational speed measured by the tachometer and the amount of run-out measured by the run-out amount measuring device.

Abstract: A method of determining velocity of a shaft is provided. The method includes receiving a first shaft position signal and a second shaft position signal. Derivatives of each of the first shaft position signal and the second shaft position signal are computed, as are squares of each of the derivatives, a summation of the squares, and a square root of the summation. The velocity is output as a result of the square root.

Abstract: An adaptive vehicle control system that classifies a driver's driving style based on vehicle U-turn maneuvers. A process determines if the vehicle has started a turn if the yaw rate is greater than a first yaw rate threshold, and determines a vehicle heading angle based on the yaw rate and a sampling time if the vehicle has started a turn. The process then determines whether the vehicle maneuver has been completed by determining if the yaw rate is less than a second yaw rate threshold. The process then determines that the completed maneuver was a U-turn maneuver if the yaw rate is less than a third yaw rate threshold during the maneuver, the final vehicle heading angle is within a heading angle range and the duration of the maneuver is less than a predetermined time threshold. In one non-limiting embodiment, the heading angle range is between 165° and 195°.

Abstract: A display device calibration system is provided. The overall color response of a display family is characterized, and the idiosyncratic color response characteristics of the display family are determined. The idiosyncratic color response characteristics of the display family are related to respective idiosyncratic color response points. Individual idiosyncratic color response point values for an individual member of the display family are determined. The color response of the individual member of the display family is specified from the individual idiosyncratic color response point values of the individual member of the display family and the overall color response of the display family.

Abstract: A method of checking turbomachine blades is presented that may be implemented using a computer and a measuring device. Turbomachine blades compatible with embodiments of the method have a profile including a centerline, suction face, pressure face, leading edge and trailing edge. The method measures geometrical coordinates of many points on a blade section profile, calculates an aerodynamic parameter of the blade section as a function of the measured coordinates, verifies whether the calculated aerodynamic parameter value departs from a valid range of parameters from a reference blade, and validates or rejects the blade depending upon whether the value of the aerodynamic parameter falls within the valid range.

Abstract: A method is provided for analyzing vibrations of a variable speed rotating body. The method includes producing a signal that is proportional to an acceleration of the rotating body and producing a plurality of pulses. Each pulse represents a revolution of the rotating body and is indicative of a vibration sample at a rotational position of the rotating body. The signal is converted to a numeric value that is indicative of a vibrational amplitude of the rotating body. The plurality of pulses are converted to revolution time periods indicative of a rotational rate of the rotating body. The method also includes producing a harmonic vibrational amplitude at a harmonic of the rotational rate of the rotating body, and representing a phase of the harmonic vibrational amplitude relative to the rotational position of the rotating body.

Abstract: The invention relates to a method for unambiguously determining a physical parameter ? using m phase-measured values ?i with 1?i?m, whereby the phase-measured values ?i have different, integer periodicity values ni and an integer periodicity difference (a) with ?n>1 within an unambiguous range E of the physical parameter ?. A value T with (b) and (c) is calculated based on the phase-measured values ?i and the periodicity values ni thereof, and, within a reduced unambiguous range Ered with (d), a value V is allocated to the value T by allocation according to (e), wherein TUk stands for a respective lower limit and TOk for a respective upper limit of T. The allocation intervals between the upper (TOk) and the lower limits (TUk) for T, as wells as the distances (f) correspond at least to the periodicity difference ?n. In order to determine the physical parameter ?, value V is added up with the phase-measured values ?i in a weighted manner.

Abstract: A meter for measuring belt slip in a belt drive system having at least a belt trained about two rotating elements. The meter comprises: two sensor inputs, to receive a digital signal related to the speed of a said rotating element; an external input, to accept a command or value; an output, to display or transmit a measurement or calculation result; and a controller, to calculate the relative speed of the two rotating elements, compare the relative speed to a set-point, and output a result indicative of belt slip.

Abstract: An angular sensor (10) is provided in a mobile body. A first setter (14) performs determination regarding the standstill state on the basis of whether or not the variation width of the angular speed is less than or equal to a predetermined value. A standstill determiner (20) determines whether or not the standstill state has continued beyond a determination time. An n?i sum-total averaging unit (34) calculates a sum-total average of (n?i) number of pieces of data obtained by excluding, from n number of pieces of data input during a period determined as a continuation of the standstill state, i number of pieces of data that are output immediately before the end timing of the period, and determines it as a zero-point offset. A zero-point corrector (36) performs the zero-point correction of the output value of the angular speed sensor (10), and outputs the corrected value to an output unit (28).

Abstract: A method of determining the velocity (?) of a vehicle is provided. The vehicle has at least one pair of a front and a rear wheel which are spaced by a wheel spacing (B). Front and rear wheel speed signals (?) are determined which are indicative of the time dependent behavior of the front and rear wheel speeds, respectively. The front and rear wheel speed signals (?) are correlated in order to determine a specific correlation feature indicative of the time delay (?) between the front wheel and rear wheel speed signals. The velocity (?) of the vehicle is determined based on the correlation feature and the wheel spacing (B).

Abstract: A method for analyzing the output of a rotary sensor, such as that coupled to a vehicle wheel assembly. In one embodiment, the method detects periodic irregularities in the output of an incremental rotary sensor and uses those irregularities with a reference signal and a pattern comparison technique to determine the absolute angular position of the sensor.

Abstract: A method for determining a critical reduction in shaft speed in a work machine having at least one monitored shaft driven by a crankshaft of an engine includes determining an actual rotational speed of the crankshaft; determining an actual rotational speed of a first monitored shaft; determining a filtered rotational speed of the first monitored shaft based on an algorithm that utilizes the actual rotational speed of the first monitored shaft, the actual rotational speed of the crankshaft, and a reference rotational speed of the crankshaft; comparing the filtered rotational speed to the actual rotational speed of the first monitored shaft; determining whether the actual rotational speed of the first monitored shaft deviates from the filtered rotational speed by a predetermined amount; and activating an alarm if the actual rotational speed of the first monitored shaft deviates from the filtered rotational speed by the predetermined amount.

Abstract: A method of analysing tachometer and vibration response data from an apparatus having one or more rotary components is provided. The method comprises the steps of: providing vibration response data and corresponding tachometer data from the apparatus for a period over which a rotary component of the apparatus varies in rotational speed, the tachometer data being for that component; repeatedly performing at intervals throughout the period the sub-steps of: determining a forcing frequency of the component from the tachometer data and a corresponding vibration response frequency of the apparatus from the vibration response data, comparing the forcing and vibration response frequencies to determine the relative phase difference between the frequencies, and determining the corresponding amplitude of the vibration response from the vibration response data; and plotting the relative phase differences and vibration amplitudes on a polar diagram.

Abstract: A method of determining a slip estimate associated with an induction motor through analysis of voltage and current signals. A fundamental frequency is calculated from a representation (e.g., complex representation) of the voltage signal, and a saliency frequency is calculated from a representation of the current signal. An estimation of slip quantity is calculated according to a slip estimation function that includes the saliency frequency, a saliency order, the fundamental frequency, a quantity of rotor slots, and a quantity of poles of the motor.

Abstract: A system and method for controlling the speed of a recirculation pump in an anode recirculation loop of a fuel cell system based on a predetermined ratio of fresh hydrogen to recirculated anode gas. The system uses a model to determine the volume flow of the recirculated gas through a fuel cell stack to determine the recirculation rate based on a measured temperature of the recirculated gas, a measured pressure drop across a recirculation pump, a pressure drop across the anode inlet and outlet of the stack, a percentage of hydrogen in the recirculated gas, and the density of the recirculated gas.

Abstract: A method for determining a critical reduction in shaft speed in a work machine having at least one monitored shaft driven by a crankshaft of an engine includes determining an actual rotational speed of the crankshaft; determining an actual rotational speed of a first monitored shaft; determining a filtered rotational speed of the first monitored shaft based on an algorithm that utilizes the actual rotational speed of the first monitored shaft, the actual rotational speed of the crankshaft, and a reference rotational speed of the crankshaft; comparing the filtered rotational speed to the actual rotational speed of the first monitored shaft; determining whether the actual rotational speed of the first monitored shaft deviates from the filtered rotational speed by a predetermined amount; and activating an alarm if the actual rotational speed of the first monitored shaft deviates from the filtered rotational speed by the predetermined amount.

Abstract: A method and system for estimating an angular position and an angular velocity of a rotor in a dynamoelectric machine measures an AC current and a potential for each of a plurality of windings coupled to a stator of the dynamoelectric machine, transforms the measured currents and potentials to a stationary frame to produce transformed currents and transformed potentials, and processes the transformed currents and transformed potentials to produce a first intermediate signal and a second intermediate signal. The first intermediate signal and the second intermediate signal are cross-coupled by being processed to obtain a first extended rotor flux value and a second extended rotor flux value that are each functions of the first intermediate signal and the second intermediate signal. The first extended rotor flux value and the second extended rotor flux value are applied to a phase lock loop to derive an estimated rotor angular position and an estimated rotor angular velocity for the dynamoelectric machine.

Abstract: Sensing vehicle speed is disclosed. A speed sensor is self powered. The speed sensor measures a speed data of multiple vehicles with one Doppler pulse. A sample is taken of speed sensor data from the speed sensor. The sample of speed sensor data is processed to calculate speed. The calculated speed is wirelessly transmitted to a server.

Abstract: The method consists in: determining in which actually sector the booster motor is located, a sector of the booster motor being defied by two successive poles; determining a relative angle position of the steering wheel in relation to the booster motor; identifying a sector, known as neutral, in which the booster motor is located when the rotation speeds of the rear wheels, i.e. right and left of the vehicle, are equal; determining an angle offset of the steering wheel corresponding to a neutral angle position of the steering wheel; determining an absolute angle position of the steering wheel which is equal to the difference between the relative angle position of the steering wheel and the offset angle thereof.

Abstract: A method for determining as a function of time the angle of rotation of a crankshaft by estimating the position of missing teeth on a target wheel is disclosed which has application to engine control. A sensor acquires, as a function of time, a periodic signal comprising a pulsating waveform, each pulse indicating the passage of a tooth past this sensor.

Abstract: A computer method or corresponding system for optimally balancing a rotor assembly. The computer system defines a theoretical centerline based on a mathematical model of the rotor assembly. For each disc or component of the rotor assembly, the invention system calculates rotor blade or bolt and washer distribution, based on calculated centerline deviations and angular locations of the discs and effective weights of rotor blade or bolt-and-washer sets. The rotor blade or bolt-and-washer distribution provides locations for placement of the rotor blades or bolts-and-washers so as to offset the centerline deviations and thus correct imbalance of the rotor assembly.

Abstract: Systems and methods are provided for an automotive drive system using an absolute position sensor for field-oriented control of an induction motor. An automotive drive system comprises an induction motor having a rotor, and a position sensor coupled to the induction motor. The position sensor is configured to sense an absolute angular position of the rotor. A processor may be coupled to the position sensor and configured to determine a relative angular position of the rotor based on a difference between the absolute angular position and an initial angular position obtained when the induction motor is started. A controller may be coupled to the induction motor and the processor and configured to provide field-oriented control of the induction motor based on the relative angular position of the rotor.

Abstract: Procedure for estimating the electrical drive speed and position of a permanent magnet rotor of a brushless electrical linear or rotating motor, especially for a drive control circuit, using multi-phase current measurements on the motor, whose measurement values, depending on the estimated position, are transformed into a rotor-related d,q reference frame i.e.

Abstract: A device adapted to automatically control the effective output of a vehicle control system/component that, for example, automatically applies braking and/or steering control, in response to tire contact with a rumble strip. The device includes a processor configured to receive a first signal indicative of contact of a vehicle tire with a rumble strip. The processor also includes logic to determine that at least one vehicle tire is in contact with a rumble strip based at least on the first signal. If the processor has received the first signal and has determined that the at least one vehicle tire is in contact with the rumble strip, the processor then issues a command to control the effective output of at least one of a vehicle control component or a vehicle control system. For example, an automatically applied braking force may be reduced to ½ its normal applied force.

Abstract: The invention relates to a method for the operation of a wind power plant (11) with a rotor (10) and a rotating apparatus (20, 22, 24) connected with the rotor (10), wherein a rotor speed (nR) and a rotating apparatus speed (n) are interrelated via a specifiable transmission ratio, wherein the rotating apparatus speed (n) is determined, and wherein a rotational speed measurement value (rpmi) is captured for the determination of the rotating apparatus speed (n). The method according to the invention is characterized in that the rotational speed measurement value (rpmi) is corrected with an intermittently variable correction value (rpmi,c) so that the determined rotating apparatus speed (rpmi,f) results, and wherein the determined rotating apparatus speed (rpmi,f) is fed as the actual value into a regulation apparatus (36) of the wind power plant (11).

Abstract: A method and system for estimating an angular position and an angular velocity of a rotor in a dynamoelectric machine measures an AC current and a potential for each of a plurality of windings coupled to a stator of the dynamoelectric machine, transforms the measured currents and potentials to a stationary frame to produce transformed currents and transformed potentials, and processes the transformed currents and transformed potentials to produce a first intermediate signal and a second intermediate signal. The first intermediate signal and the second intermediate signal are cross-coupled to produce a third intermediate signal and a fourth intermediate signal. The third intermediate signal and the fourth intermediate signal are processed to obtain a first extended rotor flux value and a second extended rotor flux value.

Abstract: A method for detecting and controlling output characteristics of a DC motor is provided in the present invention, wherein an input impedance related to the DC motor is measured for analyzing the output characteristics of the DC motor so that the output characteristics of the DC motor is capable being controlled according to the requirement of usage. By means of the foregoing method, the present invention further provides a self-propelled apparatus which functions to detect and control the output of the DC motor for maintaining the moving speed according to the environment status and road condition.

Abstract: The rotation speed measuring device includes a position sensor (40A) for outputting position signals (SSA) indicating M (where M is an integer equal to or greater than 2) rotation positions of equal phase difference in each one rotation of the rotating equipment, a clock signal generator (510) for generating a basic clock signal; a counter (610) for counting the number of pulses of the basic clock signal; a measuring interval setting unit (800) for setting a duration coefficient that indicates the ratio of a measuring interval during which the number of pulses of the basic clock signal is to be counted within a time period between two successively occurring aforementioned position signals, to the entire time period between the two position signals; and for causing the counter to count the number of pulses of the basic clock signal during the measuring interval; and calculating unit (660, 670) for calculating the rotation speed of the rotating equipment as a function of the frequency of the basic clock signal,

Abstract: Provided is a method and apparatus for controlling the precision of the rotation angle of a rotation of a dynamic apparatus, including the step of determining a conversion factor of a gyroscope installed in the dynamic apparatus to control the rotary movement to be a first conversion factor; a first step of measuring an output angular velocity in the case of applying a predetermined test operation to the gyroscope; a second step of measuring a second conversion factor based on the test operation and the output angular velocity corresponding to the test operation; a third step of computing an error between the first conversion factor and the second conversion factor; and a fourth step of updating the first conversion factor of the gyroscope by the second conversion factor in the case the error is more than a predetermined standard value, wherein in the case the dynamic apparatus is on standby or an operation command with respect to a predetermined operation is inputted, the first through fourth steps are perfo

Abstract: In a method for estimating a rotational speed curve of a shaft of a transmission of a motor vehicle after a synchronizing element which acts on the shaft has been deactivated the subsequent speed of the shaft, that is the curve of the rotational speed is estimated on the basis of the rotational speed of the shaft at the deactivation time and the rotational speed gradient at the deactivation time, taking into account a characteristic value (F) which is dependent on an activation period needed for the synchronizing element to accelerate the during activation of the synchronizing element, thereby providing for a particularly precise estimation of the rotational speed curve of the shaft.

Abstract: An apparatus for determining the torque imposed on a rotatable shaft. The shaft has at least four paired probes, paired horizontal probes and paired vertical probes. The horizontal probes are positioned 90 degrees apart from the vertical probes. If the shaft moves horizontally, the time of arrival detected by the first horizontal probes will be later than a nominal value and the time of arrival for the second horizontal probes will be earlier than a nominal value with the same amount of error. Combining data from the first and second horizontal probes will then automatically cancel out any error from horizontal motion. Similarly, combining data from vertical probes will eliminate the error due to vertical movement. Because any radial movement is a combination of horizontal and vertical movements, the use of the probes removes errors due to movement in any direction.

Abstract: A signal processor and a tracking method of a signal search range are provided which can read out precisely a specific spectrum having frequency varied. A signal processor includes an FFT computation portion to compute spectrum data by fast-Fourier-transforming an input signal, a spectrum selection portion to select a specific spectrum, a spectrum search portion to search sequentially the specific spectrum selected by the spectrum selection portion from the spectrum data computed by the FFT computation portion, and a search range computation portion to compute the search range of the spectrum searched by the spectrum search portion based on the frequency of the specific spectrum, in which the search range computation portion computes the search range based on the varied frequency of the specific spectrum and makes it track the varied specific spectrum, when the frequency of the specific spectrum varies.

Abstract: An apparatus for detecting a reversion of direction of a relative movement between a periodic scale for defining a periodic field and a field sensor includes a determiner for determining a difference and a detector for detecting the reversion of direction of the relative movement dependent on the certain difference. The field sensor outputs first and second sensor signals upon the periodic field defined by the periodic scale such that, in a first direction of movement of the relative movement, the first sensor signal is advanced from the second sensor signal and, in a second direction, the second sensor signal is advanced from the first sensor signal. The determiner determines the difference between the first sensor signal and a signal corresponding to a temporal change of the second sensor signal or between the second sensor signal and a signal corresponding to a temporal change of the first sensor signal.

Abstract: A system and method for providing blade vibration analysis of a turbine is provided. Generally, the system contains a non-contacting sensor capable of determining a distance or velocity of a blade, of the series of blades, in relationship to the sensor. The system also contains a tachometer capable of determining a speed of a shaft of the turbine, and a computer comprising a memory and a processor.

Abstract: System for evaluating the traffic environment of a motor vehicle and for influencing the speed of the motor vehicle in its own traffic lane, comprising an electronic control unit, which is connected to a signal transmitter that produces a signal characteristic of the desired speed of the motor vehicle, a signal transmitter that produces a signal characteristic of the yaw of the motor vehicle about its vertical axis, a signal transmitter that produces a signal, which is characteristic of the articles situated, in the direction of travel of the motor vehicle, in front of the motor vehicle in terms of their spacing and orientation relative to the motor vehicle and which reproduces the speed relative to the speed of the system motor vehicle and/or the spacing relative to the system motor vehicle and/or the angular offset or the cross track distance relative to the vehicle longitudinal axis of the system motor vehicle, and a signal transmitter that produces a signal characteristic of the speed of at least one whee