Matches 301 - 350 out of 414 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
5638304 Method and apparatus for active damping of vibration  
For active damping of vibration at a location subjected to a primary vibration field, a vibratory wave is generated by adaptive filtering of a reference signal and interferes with the primary field...
5631427 Accelerometer-based shock/vibration testing apparatus and associated methods for a portable computer  
A portable notebook computer has a shock/vibration testing system incorporated therein and including first and second memory chips and a miniature accelerometer mounted on the computer motherboard...
5629865 Pulse-echo ultrasonic imaging method for eliminating sample thickness variation effects  
A pulse-echo, immersion method for ultrasonic evaluation of a material which accounts for and eliminates nonlevelness in the equipment set-up and sample thickness variation effects employs a single...
5625150 Integrated acoustic leak detection sensor subsystem  
A sensor system for mapping absolute acoustic noise intensity in a three-dimensional acoustic noise field. Localized noise sources within a vessel are extracted using a distant array of transducers...
5617315 Active vibration damping system for a vehicle  
A vibration damping system for a vehicle has a vibration sensor which detects vibration of solid elements on the vehicle and vibration of air inside the vehicle. A first vibrator supports a power...
5614676 Method of machine vibration analysis for tire uniformity machine  
A method for analyzing the vibration of a tire uniformity machine having a number of rotating components uses the signals from load cells when the machine idle to output voltage signals that are...
5610837 System and method for nondestructive vibrational testing  
The present invention is a system and method for nondestructive vibrational testing of a specimen, such as a paper core tube. The system analyzes transverse vibrations of the simply supported...
5610838 Coordinate input device for calculating a coordinate of an input position of an applied vibration  
A shift of an input coordinate by a change in temperature in a coordinate input device is prevented. An arithmetic operation and control circuit 1 applies a drive signal to a vibration pen 3 and...
5610339 Method for collecting machine vibration data  
A method is provided for determining and for predicting the present and future condition of a machine having at least one rotative element. The method includes an initial step of storing in memory...
5602759 Motor vehicle vibrating system  
A motor vehicle vibrating system vibrates a motor vehicle having front and rear axles rotatably supported on a motor vehicle frame to simulate the load which would be applied from an actual road to...
5602757 Vibration monitoring system  
A predictive vibration monitoring system for a machine includes a microcontroller and a machine to be monitored. The machine to be monitored includes at least one rotative element. At least one...
5579246 Method and device for the correction of measurement errors due to vibrations in coordinate measuring devices  
For the correction of measurement errors, due to vibration, of coordinate measuring devices, the time course of the interfering vibrations is stored by means of sensors (a x , a y , a z ) on a...
5579238 Instrumented computer keyboard for prevention of injury  
A system to monitor the force with which a user strikes keys on a computer keyboard and to alert a user if the force used is greater than a threshold. The system includes a keyboard having a casing...
5574646 Gear noise evalutation system  
A gear noise evaluation system having a neuro-computer which is provided with sound pressure values from an FFT analyzer. At this time, an evaluator simultaneously presets an absolutely sensual...
5570302 Distance measuring device, and coordinate input apparatus utilizing the same  
In a distance measuring device for calculating the distance from the arrival time of the Lamb wave, the thickness of the propagation plate and the frequency of the Lamb wave are optimized in...
5570299 Coordinate input apparatus, vibration sensing device and method of evaluating same  
Vibration applied to a tablet is sensed by a sensor provided on the tablet and a time delay from generation of the vibration to the sensing thereof is measured, whereby distance from the vibration...
5544073 Rotor balancing calculator  
A portable, hand-held, battery-powered rotor balancing calculator has a data port, which includes a host communications port to down-load set-up data from, and upload collected data to a host...
5539678 Coordinate input apparatus and method  
When vibration is entered on a vibration transmitting tablet, the vibration is sensed by vibration sensors attached at four corners of the tablet. When this is done, a time delay from entry of the...
5502650 Apparatus for adjusting rotor  
To improve the coupling adjustment workability and precision of a rotor, irrespective of change in bearing characteristics due to an increase of rotational speed, the apparatus detects angular...
5493511 High speed thin plate fatigue crack monitor  
A device and method are provided which non-destructively detect crack length and crack geometry in thin metallic plates. A non-contacting vibration apparatus produces resonant vibrations without...
5477149 Method and apparatus for non-invasive monitoring of solenoid valves  
A non-invasive apparatus and method is disclosed which is adapted for testing of solenoid valves to verify valve operation. The non-invasive apparatus and method monitors with time both the stroke...
5471880 Method and apparatus for isolating and identifying periodic Doppler signals in a turbine  
An improved method and apparatus for detecting and identifying one or more resonantly vibrating blades of a turbine through the use of acoustic sensors imbedded in the stationary casing of the...
5457640 Method of checking condensate dischargers  
Method of testing the functionality of condensate dischargers. Any ultrasonic vibrations present in the condensate discharger are picked up with an ultrasonic vibration sensor and transformed into...
5390545 Apparatus for measuring torsional vibrations of rotating machinery  
An apparatus for measuring torsional vibrations of rotating machinery is provided. A wheel having a plurality of spaced apart teeth is connected to the rotating machinery. A sensor detects the...
5388056 Method and system for vibration test  
A vibration testing system is economical and has high precision in realizing an equivalent test condition for testing for an entire structure, by employing a partial model by coupling testing of a...
5343408 Device for on-line automatic fluid injection balancing system  
Disclosed is a method and device for automatic dynamic balancing operations on machine lines so as to compensate unbalance in a rotor. Vibration signals of the rotor obtained by a transducer and...
5332356 Process and a device for determining the erosion caused by cavitation in components through which fluid flows  
The erosion caused by cavitation in components through which fluid flows, such as, for example, a pump (1), can be derived by detecting the vibration in the pump casing. The fluid-borne noise...
RE34663 Non-invasive determination of mechanical characteristics in the body  
A non-invasive system and method for inducing vibrations in a selected element of the human body and detecting the nature of responses for determining mechanical characteristics of the element are...
5321628 Process and apparatus for selecting tires to reduce steering pull and tire set selected using same  
Tires are measured for a parameter correlated to a tendency to contribute to steering pull when used on a vehicle. A group of the measured tires is then ranked into a successive series by ordering...
5258923 System and method for detecting the occurrence, location and depth of cracks in turbine-generator rotors  
System and method for detecting the occurrence, location and depth of a crack in the rotor of a turbine-generator. The location and depth of a crack are determined by monitoring the fundamental and...
5255565 Method and apparatus for monitoring multiple points on a vibrating structure  
An apparatus for monitoring a vibrating structure, such as a bridge, uses multiple motion sensors spaced along the structure, each of which produces an analog raw data signal which is then filtered...
5251151 Method and apparatus for diagnosing the state of a machine  
A method and apparatus for diagnosing the mechanical condition of a machine. The method of the invention includes the following steps: sensing a reference vibrational signal of the machine;...
5239468 Automated helicopter maintenance monitoring  
An automated helicopter maintenance monitoring system (20), which is comprised of a flight data recorder subsystem (22) and a maintenance computer subsystem (24), collects data from a plurality of...
5234315 Apparatus for preventing a turbine from exceeding revolution speed  
An apparatus comprises a first rotational speed detecting device provided on a stub shaft at a position closer to a turbine than a pump, a second revolution speed detecting device provided at the...
5231875 Method and apparatus for evaluating gear motion characteristics, based on tooth profile deflection differentiated by rotation angle of the gear  
A method of evaluating motion characteristics of a workpiece gear, wherein the amount of tooth profile deflection of the workpiece gear in a direction substantially perpendicular to a surface of...
5227982 Digital reverberation time measurement system  
Apparatus and method, having both structural and acoustical applicability, for measuring damping of a solid or fluid resonant physical system in terms of reverberation or decay time, featuring a...
5224033 Work automation apparatus for hydraulic drive machines  
A hydraulic actuator is operated using a manual operation device, operations from the manual operation device are stored in the path of an operation signal to a valve controller and these are read...
5216921 Method and apparatus for detecting defects and different-hardness portions of an object with protrusions  
A test object having a plurality of protrusions is inspected for a defect and/or different-hardness by applying vibration to the test object. Spectral data of the vibration of the test object is...
5214960 Method and apparatus for detecting defects in an object by vibrating the object in a plurality of positions  
A test object such as an engine cylinder is inspected for any defect such as a crack, a blowhole, a cavity, or the like by applying vibration to the test object at two different positions on a side...
5206816 System and method for monitoring synchronous blade vibration  
A system and method are provided for monitoring synchronous blade vibration in a turbo-machine. At least three sensors capable of detecting the arrival of each blade are arranged about the cylinder...
5202824 Rotating force generator for magnetic bearings  
The present invention relates to apparatus for stabilizing the operation of rotational machinery, particularly machinery which uses magnetic bearings. Accelerometers sense various vibrations within...
5179860 Defect detecting method and apparatus  
A defect detecting method for detecting whether or not an object to be measured has a defect includes the steps of vibrating the object to be measured, picking up the vibration, and detecting that...
5170358 Method of controlling chatter in a machine tool  
A method of controlling chatter in a rotating, chip cutting machine tool cutting at a predetermined depth on a workpiece in which the speed of rotation of the cutting tool relative to the workpiece...
5146776 Method for continuously calibrating an optical vibration sensor  
An optical vibration sensor is automatically calibrated by extracting a beat frequency vibration signal from a vibration signal produced by the optical vibration sensor, computing a resonant...
5075857 Unmanned compliance monitoring device  
Unmanned compliance monitoring device, data communication network and transaction processing apparatus for monitoring earth tremors, collecting and reporting seismic data profiles and calculating...
5029101 High voltage conductor mounted line powered monitoring system  
A hot-stick mountable, line powered, EHV conductor mounted environmental monitoring apparatus. The sensor module contains sensors for monitoring solar insolation, wind speed, lightning flashes,...
5016186 Method of detecting noise disappearance and detecting device therefor  
A method and apparatus detect a noise disappearance of instruments, etc. in various instrumentations in a chemical plant or the like. Detection values which are outputs from a detector (1) are...
5010769 Automatic pseudokeyphasor generator  
A pseudokeyphasor signal control unit incorporated into apparatus for analyzing the vibratory behavior of a rotating machine in response to signals representing vibrations occuring in the machine,...
4989159 Machine monitoring method  
Method of monitoring the operational state of a machine, particularly one having two mutually co-acting rotating machine parts operating at different revolutionary rates. Sensed vibration spectra...
4984173 System for aligning a rotating line-shaft  
Each bearing of an aligned line-shaft has vibration responses which differ from the vibration responses of a misaligned system in which at least one of the bearings is statically displa=ced....
Matches 301 - 350 out of 414 < 1 2 3 4 5 6 7 8 9 >