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8146434 |
Apparatus for measuring vibration characteristics of head gimbal assembly
An apparatus for measuring the vibration characteristics of a head gimbal assembly can grasp resonant characteristics at high frequencies and efficiently measure the vibration characteristics of...
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8146433 |
Failure detect device and failure detect method
A failure detect device detects the presence of a failure in a peripheral member of a rotary shaft by analyzing a vibration generated in a device provided with the rotary shaft when the rotary...
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8136405 |
Method and device for monitoring the dynamic behavior of a rotating shaft, in particular of a gas or steam turbine
The invention relates to a method for monitoring the dynamic behavior, in particular of the oscillating behavior of a rotating shaft, the oscillation being detected by at least two sensors at...
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8061205 |
Acoustic method and apparatus for detection and characterization of a medium
An acoustic method and apparatus detects or characterizes a medium in a structure which may be a container, such as a pipeline for transportation of oil, gas, or hydrocarbon condensate. A pulse of...
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8028583 |
Method and device for identifying squeaking noises
A method for detecting squeaking noises within a sound signal generated during operation of a motor vehicle or during operation of a component thereof is described; in this method the sound signal...
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8014903 |
Method for suppressing vibration and device therefor
The vibration suppressing device includes vibration sensors, a FFT calculating unit, a store device, a calculating unit, and a NC device. The vibration sensors detect a time-domain vibrational...
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8005574 |
Vibration suppressing method and device
A stable rotation speed is acquired by finely changing a rotation speed of a rotary shaft 3 based on an expected stable rotation speed, and calculating an amount of change of a k′ number, and the l...
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7997140 |
Method and apparatus for troubleshooting noise/vibration issues of rotating components
There is provided a method for troubleshooting noise/vibration issues of rotating components, the method comprising: receiving an audio signal of the rotating components in operation; generating a...
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7975548 |
Acoustic thickness measurements using gas as a coupling medium
An acoustic apparatus adapted to operate in a gas filled space from a first side of an object to be measured for making a non-contact thickness measurement thereof includes an electro acoustic...
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7933691 |
System for and method of monitoring free play of aircraft control surfaces
A system for monitoring the free play in aircraft control surfaces includes one or more accelerometers secured in or on the aircraft control surfaces and a computer system connected to the one or...
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RE42197 |
Method for compensation for mechanical oscillations in machines
A method for compensating for a mechanical oscillation which has a frequency spectrum which can be approximately represented by a number of discrete frequency components, at a machine shaft via at...
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7866213 |
Method of analyzing non-synchronous vibrations using a dispersed array multi-probe machine
A method for identifying an unfolded non-synchronous blade vibration frequency in blades on a rotating rotor using a plurality of probes spaced from each other about the rotor. A set of data is...
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7860663 |
Abnormality diagnosing apparatus and abnormality diagnosing method
A abnormality diagnosing apparatus used in a machine equipment including a rotating or sliding part relative to a stationary member includes a detecting portion 31 fixed to the rotating or sliding...
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7845231 |
Shear measuring method and its device
A resonance shear measuring method capable of simple and rapid measurement by obtaining a resonance shear curve through Fourier transformation of a damping curve of an oscillation on one side...
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7779690 |
Vibrating wire sensor using spectral analysis
Systems and methods for analyzing the resonant frequency of vibratory wires within vibratory wire gauges. The resonant frequency of the vibrating wire is determined by using an interface that...
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7770458 |
Method of detecting damage to an engine bearing
The invention relates to a method of detecting damage in a bearing supporting at least one rotary shaft of an engine in rotation, the method consisting in: defining a measurement period...
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7690258 |
Buried pipe examining method
An impact elastic wave test is conducted to measure propagating waves in a pipe to be examined, a frequency spectrum of the propagating waves is analyzed, and at least a spectral area value in a...
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7640139 |
Abnormality diagnosing system for mechanical equipment
Provided are an envelope processor 103, for obtaining an envelope for a detected signal; a FFT unit 104, for converting the envelope into a frequency spectrum; a peak detector 105, for smoothing...
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7559240 |
Method and device for assessing residual service life of rolling bearing
Degradation of the lubricant due to contamination of the lubricant with wear particles or moisture, which greatly affects the service life of rolling bearings, can be detected in a cost-effective...
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7555951 |
Determination of remaining useful life of gas turbine blade
A system may be used to indicate a need for replacement of a vibrating structure and includes a sensor, an indicator, and a processor. The sensor senses a frequency of vibration of the vibrating...
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7549340 |
Apparatus for measuring vibration characteristic of head gimbal assembly
An apparatus surely measures the vibration characteristic of a head gimbal assembly and has a wide range of resonance frequencies to be set, the apparatus has a first laser Doppler vibrometer to...
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7509861 |
Method and device for local spectral analysis of an ultrasonic signal
The method decomposes the radio frequency signal into sub-bands by filtering, for example with a time-frequency transform. From the coefficients acquired through decomposition a matrix of spectral...
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7487679 |
Vehicle vibration analyzer
A diagnostic vibration analyzing system and method for measuring and characterizing both linear and torsional vibrations in a vehicle or a piece of industrial equipment (collectively a...
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7437935 |
Continuous chatter boundary criteria for manufactured parts
A chatter boundary system includes a measuring module, a comparison module, and a boundary module. The measuring module measures and collects samples of undulations in a manufactured part. The...
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7430483 |
Method and apparatus for diagnosing a mechanism
A method of analyzing variations in an indicator of the behavior of a mechanism, in which noise is extracted, and any discontinuities from an indicator in order to obtain a trend, variations in the...
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7317994 |
Method and apparatus for signal signature analysis for event detection in rotating machinery
A method for analyzing vibration including: acquiring a vibration signal; isolating a vibration signal event in the acquired signal; determining a frequency of a damped sinusoid of the vibration...
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7296472 |
Method and apparatus for acoustic sensing of structures
A method and system provides for acoustic sensing of structures, including a general shape and/or configuration of the structure and movement within the structure. Acoustic waves are used to...
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7275439 |
Parametric ultrasound imaging using angular compounding
Parametric ultrasonic measurements which characterize the structure of tissue, using information from an ultrasonic signal beyond amplitude information, are obtained by combining multiple...
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7204146 |
Device and method for measuring thickness
A device for measuring thickness of an object has a vibration generator for generating vibrations in the object, a vibration detector for detecting vibrations generated in the object by the...
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7174786 |
Quality testing process
A process is performed for testing the quality of a unit such as an electromotor, which has at least one mobile part, which is mobile within a given frequency range with varying frequencies and is...
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7131332 |
Vibroguard for machine elements
A measuring system for structure-born noise measurement of machine elements in machine housings. The measuring system is fixed to the machine housing via a lubrication hold opening. A mounting pin...
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7124637 |
Determining amplitude limits for vibration spectra
A method for determining vibration amplitude limits of a mechanical device. The method comprises identifying a mechanical device and a frequency range for a spectrum to be analyzed, retrieving...
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7102795 |
Method for engraving printing cylinders
In a method and apparatus for engraving printing cylinders in an electronic engraving machine, an engraving control signal is formed from an image signal that represents tonal values of cups to be...
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7093492 |
Configurable vibration sensor
A configurable vibration sensor having a sensor circuit, an analog-to-digital converter and a processor is provided. The sensor circuit employs a vibration sensing element and a variable bandwidth...
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7059191 |
Determining defective devices which generate sound during operation
Determining whether a device is defective by analyzing the sound signals generated by the device. Digital samples are generated to represent the sound signals. Digital samples are transformed from...
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7036378 |
High and low frequency band dual output transducer
A sensor circuit, method, and system for conversion of a high-impedance, broad frequency range signal from a transducer into two low-impedance signals, one containing high-frequency components and...
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7026943 |
Acoustic wave ice and water detector
An acoustic wave sensor utilizes one or more acoustic waves trapped in an acoustic wave cavity to detect the presence of one or more substances on a surface of the acoustic wave cavity. To detect...
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7027940 |
Stepped sine wave frequency response measurement system
A low cost, low power and lightweight swept sine wave analysis system that is affordable to engineers, university laboratories and students, providing accurate magnitude and phase response...
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6954146 |
Method for determining a state of a road during the driving mode of a motor vehicle
In a method for determining the state of a road during driving of a motor vehicle, the sound which is generated when a vehicle tire rolls on an underlying surface is sensed. A frequency signal is...
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6951132 |
Rail and train monitoring system and method
A system and method for determining at least one parameter related to a train traversing on a railway track is provided. The system comprises a sensor coupled to a detection location and configured...
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6925879 |
Vibration analyzer and method
A tool and method to identify a defect in a vehicle through a vibration frequency is provided. To identify the defect in a vehicle, a sensor senses a vibration frequency and generates a signal in...
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6923064 |
Method and device for detection, identification and densimetric quantification of grain-eating insects in stocks of cereals
A method and a device for detection, classification and densimetric quantification of grain-eating insects, of one or several families of insects simultaneously present, in stocks of cereals and...
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6915697 |
Testing and monitoring of a shock wave or pressure wave source
A device for the testing and monitoring of the function of a shock wave or pressure wave source is provided. The testing and monitoring device is characterized in that a passive non-linear...
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6898976 |
Brake noise detection device
An output signal that accords with a rotation speed of a brake rotor of a respective wheel is output by a vehicle wheel speed sensor. A noise frequency identification portion identifies a frequency...
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6889553 |
Method and apparatus for vibration sensing and analysis
A method and apparatus for sensing and measuring stress waves. The method comprises the steps of: a.) sensing motion, where the motion comprises a stress wave component and a vibration component;...
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6874364 |
System for monitoring mechanical waves from a moving machine
A system for monitoring mechanical waves from a machine which in operation has moving particulate matter therein, the system including at least one sensor located on the machine at a location away...
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6845672 |
Sensor assembly and sensor system for combined bearing load sensing and bearing health monitoring
Sensor assembly for measuring a load on a bearing having at least one bearing ring (11), the at least one bearing being provided with a cavity (12) for holding the sensor assembly. The sensor...
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6822929 |
Micro acoustic spectrum analyzer
A micro acoustic spectrum analyzer for determining the frequency components of a fluctuating sound signal comprises a microphone to pick up the fluctuating sound signal and produce an alternating...
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6796183 |
Method for compensating for mechanical oscillations in machines
A method for compensating for a mechanical oscillation which has a frequency spectrum which can be approximately represented by a number of discrete frequency components, at a machine shaft via at...
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6779404 |
Method for vibration analysis
Output-only modal testing of an object. Vibrations are excited in said object and measured by a number of vibration sensitive detectors. From the data of the measurements, a spectral density matrix...
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