Matches 351 - 400 out of 414 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
4977516 Data acquisition device for balancing rotating components of large machinery  
A device analyzes vibration-related problems in large rotating machinery which has the capability to receive input simultaneously from a plurality of vibration sensors. A microprocessor stores and...
4953098 Higher harmonic control system for X-Wing aircraft  
In an X-Wing aircraft a dynamic higher harmonic control (HHC) system addresses the vibration which typifies a very rigid rotor and is implemented in two ways--a scheduled HHC and an active HHC. A...
4926341 Method and apparatus for calibration of balancing unit  
An unbalance measuring procedure and circuitry therefor employs correction weights for the compensation of unbalance of a rotating component under test. After a measuring run, stored and displayed...
4924420 Tacho signal processing  
This invention relates to apparatus for producing a periodic output signal having a predetermined period ratio (a/b) relative to a periodic input signal. Signals from a tachometer on a gearbox are...
4908785 Data compression method for telemetry of vibration data  
Vibrational data is compressed about 8.5 to 18 times by isolating a low frequency component from the signal, frequency analyzing the signal to obtain important frequency/amplitude data, and...
4885707 Vibration data collecting and processing apparatus and method  
In a system for predictive maintenance of machinery based on vibration data history, a portable battery operated vibration data collector and processor unit (10) is equipped with an electro-optical...
4879901 System for evaluating the condition and performance of a valve and valve operator combination  
A device for measuring and indicating the forces on a valve stem over at least a portion of the valve strokes is comprised of a strain sensor secured to the valve yoke for sensing strains...
4872337 Nondestructive testing of gears  
A gear evaluation system which includes means for measuring gear rotational speed and gear case vibrational displacement associated with gear mesh action. A signal is displacement associated with...
4817003 Apparatus for detecting and indicating the balance of a rotary body in a machine tool  
The present invention relates to an apparatus for detecting and indicating the balance of a rotating body such as a grinding wheel, a spindle or the like in a machine tool such as a grinding...
4807167 Rapid method of digital automatic gain control  
A method of digital automatic gain control does the required circulation without numerical multiplication or division and makes possible fast process control using a digital AGC. A signal channel...
4773019 Microprocessor laser control system for multiplane balancing of rotors  
A system for balancing rotating members comprising a laser head which emits a laser shot in response to a laser control signal to remove material from the rotating member. The laser control signal...
4751657 Method and apparatus for detecting axial cracks in rotors for rotating machinery  
Axial cracks in the rotor assembly of a variety of rotating machinery are detected while the rotor is being rotated, by sensing mechanical vibrations of the rotor at a location along the length...
4724524 Vibration-sensing tool break and touch detector optimized for machining conditions  
A Machine Tool Monitor detects significant cutting tool breakage and the first contact of an advancing tool to a workpiece, and does this by monitoring vibration signals produced by the machining...
4685335 Method and apparatus for monitoring cracks of a rotatable body  
A method and apparatus for monitoring cracks of a rotatable body by detecting cracks by measuring accoustic emission signals and evaluating the depth of cracks from the result of the comparison of...
4631683 Acoustic detection of contact between cutting tool and workpiece  
A system and method for monitoring vibrations of a machine tool metal-cutting tool insert and interpreting them to promptly detect the initial touch to the workpiece and signal the tool to stop...
4614117 Vibration monitoring apparatus  
An apparatus monitoring the vibrations of a rotary machine precisely at all times. In a control processor, a rotational frequency is calculated with a data signal from a register which operates on...
4612620 Apparatus for collecting scheduled maintenance data  
Apparatus for collecting vibration data in accordance with a predetermined schedule. Operable in either a data input or program mode, the apparatus is coupled with a vibration transducer which is...
4608650 Imbalance measuring system and method  
A vibration monitoring system analyzes tachometer signals of a rotating engine to ascertain the period of rotation from which sampling pulses at predetermined intervals can be generated. Sampled...
4559600 Monitoring machine tool conditions by measuring a force component and a vibration component at a fundamental natural frequency  
Methods and apparatus for monitoring, during machining of a workpiece (30,30'), the wear condition of a cutting tool (31,31') having its cutting portion in a structure (32,32') that is held by...
4555943 Method of and apparatus for measuring an unbalance value of a wheel mounted on a body of an automobile  
A method of measuring an unbalance value of a wheel wherein a plurality of curves showing the relation between the magnitude of vibration of the wheel when it is rotated and the true value of the...
4543827 Method for measuring physical properties of material  
A method for measuring the physical properties of material comprising the steps of producing a tone burst wave by a tone burst wave oscillator, radiating acoustic energy of the tone burst wave onto...
4535411 Field balancing apparatus  
Apparatus for carrying out the field balancing of rotors utilizing trial weight techniques. A display is provided with the portable apparatus which serves to prompt the operator with respect to...
4520674 Vibration monitoring device  
A portable vibration monitoring device (10) for use in connection with a base computer (11) which stores data regarding the nature and parameters of vibration measurements to be made on preselected...
4506551 Transducer selecting system  
A transducer selecting system for use in a noisy environment can operate in a vibration monitoring system using a data processor. Narrow band signals representing transducer information at selected...
4488240 Vibration monitoring system for aircraft engines  
A vibration monitoring system for aircraft engines includes a nonrecursive digital filter network controlled by a data processor. Digital techniques process tachometer signals to general sampling...
4453407 Vibration diagnosis method and apparatus for rotary machines  
A vibration diagnosis method and apparatus for rotary machines adapted for measuring the vibration of rotor shaft of a rotary machine, extracting the vibration component synchronous with the...
4437163 Method and apparatus for symptom diagnosis by monitoring vibration of shaft of rotary machine  
A method of symptom diagnosis by continuously detecting vibration of the shaft of a rotary machine and monitoring a signal indicative of detected shaft vibration for the diagnosis of the operating...
4435770 Vibration diagnosing method and apparatus for a rotary machine  
A method and apparatus for diagnosing a vibration in a rotor of the rotary machine including detecting the number of rotations and the vibration in the rotor when the rotor is rotating, extracting...
4428055 Tool touch probe system and method of precision machining  
A system and method are disclosed for automatically machining a work piece to precise selectively determined dimensions under computer numerical control in which the cutting tool is set...
4426641 Method and apparatus for monitoring the shaft vibration of a rotary machine  
From the viewpoint of the preventive maintenance operation of a rotary machine, it is a very important subject to monitor the shaft vibration of the rotary machine and grasp the operating state of...
4415979 Method and apparatus for detecting the presence of an animate body in an inanimate mobile structure  
The present invention provides a method and detection system for determining whether a person or other animate body is present in a vehicle by analyzing the power of the output signal from a...
4409659 Programmable power supply for ultrasonic applications  
This method provides methods and apparatus for programmably regulating power provided to ultrasonically vibrate a metal-cutting tool, with power being regulated as a function of physical parameters...
4408285 Vibration analyzing apparatus and method  
Apparatus and method utilized in carrying out vibrational analysis wherein the output of a vibration monitoring transducer is treated by filtering in stepped fashion over a broad spectrum of...
4408294 Method for on-line detection of incipient cracks in turbine-generator rotors  
A method is disclosed for detecting incipient cracks in the rotor of a turbine-generator while the turbine-generator is on-line operating under normal conditions. Vibration signature analysis is...
4372164 Industrial process control instrument employing a resonant sensor  
An instrument for developing at a central control station a signal responsive to the value of a process condition occurring at a field measurement station remote from the central control station...
4366544 Judging system for detecting failure of machine  
A system for detecting whether a machine is in the normal or abnormal state by comparing detected values of waveforms of signals such as vibration generated from the machine with a set value a...
4352293 Method of diagnosing vibration of rotary machine  
In a rotary machine mounted on a rotary shaft journaled in journal bearings, a source of unusual vibration of the rotary machine is identified on the basis of the results of the steps of (1)...
4345472 Method and apparatus for digitally analyzing dynamic unbalance of a rotating body  
Mechanical vibration of a rotating test body is translated into a periodic signal which represents a combined vector of the unbalance means of the rotating body and the mechanism that rotates it....
4310892 Method for determining imbalance in a mechanical system  
A method for determining imbalances in a mechanical system, such as a rotor, by detecting oscillations caused by the imbalances, selecting a useful signal having a particular amplitude and...
4302813 Method of controlling operation of rotary machines by diagnosing abnormal conditions  
The present invention relates to a method of controlling the operation of large rotary machines such as steam turbines and generators in a thermal power plant or nuclear power plant. More...
4299104 Method of controlling roll eccentricity of rolling mill and apparatus for performing the same method  
A method of controlling roll eccentricity of a rolling mill is disclosed, in which a component of a rolling load variation which is due to eccentricities of an upper and a lower backup rolls of the...
4298948 Method and apparatus for generating a digital representation of the instantaneous angular position of a rotating body and for generating rectangular coordinate equivalents thereof  
A rotating body, through appropriate pickup devices, generates one pulse for each rotation. The pulses are delivered to a phase locked loop which generates 2 n pulses for each input pulse and...
4271469 Method for detecting knocking in internal combustion engine  
A knocking detection method for internal combustion engines in which vibrations of the engine are detected by a vibration sensor and a peak value of the vibrations during a predetermined interval...
4255965 Apparatus for detecting oscillations occurring during engine knock  
In order to suppress the train of detector oscillations after the disappearance of the engine knock phenomenon, the invention provides a piezoelectric oscillator which is set into vibration by...
4181025 Means for adjusting the area of an orifice in a vibration system  
A spherical shaped plate and an orifice opening are oriented such that the edge of the plate can span and cover part of the orifice opening. Stops are provided to prevent a full 360° rotation. The...
4181029 Multi-axis, complex mode pneumatically actuated annular frame shaker for quasi-random pneumatic vibration facility  
Pneumatically driven vibrators coupled to resonating, self-attenuating structures define a shaker which, when included in a vibration system, enables a test item to be vibration tested under...
4181026 Quasi-random pneumatic vibration facility and automatic frequency modulating system therefor  
A low-cost, multi-axis, quasi-random vibration system includes pneumatically driven vibrators coupled to a resonating, self-attenuating shaker structure to achieve a frequency spectrum and...
4135244 Method and apparatus for programming and reducing runout in rotating shaft vibration signal detection  
Method and circuit for detecting the slow roll electrical runout signal of a rotating shaft, as synchronized with a tachometer signal, and impressing this signal waveform in digital form in a...
4110730 Rate sensitive system for a seismic sensing range containment apparatus  
A rate sensitive system for a seismic sensing pedestrian range containment evice monitors the shift in relative energy of a footstep as a function of footstep rate. A rate sensitive relative energy...
4089055 Electronic monitoring apparatus  
A method and apparatus for electronically monitoring the condition of an object which normally emits stationary stochastic signals is disclosed wherein electronic signals representative of the...
Matches 351 - 400 out of 414 < 1 2 3 4 5 6 7 8 9 >