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7469595 |
Piezoelectric damage detection device
A device for use in detecting structural damage includes at least one piezoelectric wafer that has a sensor, and an actuator in-plane with the sensor. At least one of the sensor and the actuator at...
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7430910 |
Device for testing cabin parts of commercial aircrafts
A simulation arrangement is used for laboratory testing of enclosed partial cabins to be installed as resting cabins in commercial aircraft. The partial cabin is outfitted with vibration generators...
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7412899 |
MEMS-based monitoring
A solution for monitoring a property of an object and/or an area using a Micro-ElectroMechanical Systems (MEMS)-based monitoring device is provided. In an embodiment of the invention, the...
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7328622 |
Soft support systems and methods for dynamically testing structures
Soft support systems and methods for dynamically testing structures are disclosed. In one embodiment, a soft support system adapted to decouple a structure from a support surface for dynamic...
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7181356 |
Device and method for analyzing the structure of a material
The invention relates to a device that is used to analyse the structure of a material. The inventive device comprises: probe elements ( 5 ) which are used to (i) emit a wave, in the material, with...
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7085655 |
Method and device for detecting defects of at least one rotary wing aircraft rotor
A method and apparatus for detecting the defects of at least one rotor of a rotary wing aircraft, in particular a helicopter, in order to adjust the rotor. In the method, in a preliminary step, a...
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7057176 |
System and method for multiple mode flexible excitation in sonic infrared imaging
A defect detection system for thermally imaging a structure that has been energized by a sound energy. The system includes a transducer that couples a sound signal into the structure, where the...
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7036361 |
Method and device for checking the air noise of a motor vehicle
A method is used for checking the air noise of a motor vehicle, particularly of a passenger car, which air noise is generated by air flowing onto an outer skin of a vehicle body of the passenger...
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7010982 |
Method of ultrasonically inspecting airfoils
A method is disclosed for nondestructively examining airfoils for defects without removing them from the turbine machines of which they are a part. The method uses phased array ultrasound...
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6990419 |
System for identifying a signal source
A system for identifying a signal source in a predetermined space, the system including multiple sensing units arranged at different locations to detect signals in the predetermined space. The...
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6975948 |
Method of identifying a source of a signal
In a method of identifying a source of a signal, the signal is recorded and then analyzed in order to determine its spectrum. The method includes the following steps:
in parallel with...
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6892152 |
Method for identifying a signal source
A method for identifying a signal source in a predetermined space, the method including inventorying a set of identified signatures corresponding to a plurality of signal sources and recording a...
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6829959 |
Apparatus and method for moving a sensor over a workpiece
The apparatus and method for moving a sensor over a workpiece includes a sensor, and an actuating member. The sensor, such as a non-destructive test sensor, is carried by the actuating member, and...
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6804615 |
Method of estimating system dynamics by subsystem transfer function testing
A method according to the present invention calculates a performance function for a structural system ( 10 ) that can be used to determine system dynamics at points of interest on the structural...
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6792809 |
Self-aligning turbine disc inspection apparatus
A self-aligning turbine disc inspection apparatus ( 30 ) for positioning a non-destructive examination sensor ( 38 ) proximate the disc web surface ( 20 ) of a turbine rotor assembly ( 10 ). The...
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6637266 |
Non-destructive inspection, testing and evaluation systems for intact aircraft and components and method therefore
A non-destructive inspection, testing and evaluation system and process is provided for the review of aircraft components. The system provides for a structure configured to contain an inspection...
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6619127 |
Structural test soft support system
A support system for ground vibration testing of a large flexible structure. The system includes a plurality of light weight lifting mechanisms that impart an upward force sufficient to lift the...
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6613169 |
Thermoplastic rewelding process
Thermoplastic welding is an emerging technology targeted at significantly reducing the manufacturing cost of aerospace structure by eliminating fasteners and the touch labor associated with...
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6564640 |
Smart skin structures
A smart skin structure has vibration energy managing and steering capabilities. The skin can be used to managing vibrations in the skin or shell of a system, subcomponent, device, or structure. The...
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6550332 |
Real-time noise source visualizing system using acoustic mirror
Disclosed is a noise source visualizing system used in a wind tunnel test to measure generated sounds, the system comprising an acoustic mirror for converging sound waves of sounds generated on a...
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6263737 |
Acoustic fault injection tool
A device for generating an acoustic stress wave in metal structures in real-time. A cylindrical housing includes a chamber, a piezostack actuator inside the chamber, and a support ring for...
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6192759 |
Remote self-powered structure monitor
An acoustic rotor monitor that is an autonomous self-powered measurement instrument which can detect embedded and hidden fatigue cracks in remotely inaccessible devices such as helicopter rotor...
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6065344 |
Apparatus and methods for cooling an ultrasonic inspection transducer for turbine rotor wheel repair
A damaged turbine rotor wheel dovetail is repaired by cutting off the annular dovetail and welding a new forged ring onto the remaining wheel body. Fine-line welding is accomplished by inserting...
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6006163 |
Active damage interrogation method for structural health monitoring
An active damage interrogation (ADI) system (and method) which utilizes an array of piezoelectric transducers attached to or embedded within the structure for both actuation and sensing. The ADI...
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5911158 |
Piezoelectric strain sensor array
An apparatus and method for determining the dynamic response of a physical structure is disclosed. A single sheet of a piezoelectric polymer film, preferably polyvinylidene fluoride, or PVDF, is...
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5841031 |
Method and apparatus for evaluation and inspection of composite-repaired structures
A method and apparatus for evaluation and inspection of a composite-repaired structure generates a frequency-varying electrical signal to test and evaluate the composite-repaired area. The...
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5741965 |
Aircraft jet engine testing tool
The present invention is directed towards an aircraft engine testing tool which facilitates the visual inspection of aircraft internal engine blades by permitting the automatic repositioning of the...
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5698787 |
Portable laser/ultrasonic method for nondestructive inspection of complex structures
A method and apparatus for non-destructive inspection of complex structures employs a portable laser based ultrasonic transducer 600 output to rapidly detect and size flaws in such structures,...
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5483833 |
Method and apparatus for monitoring aircraft components
Operability of aircraft mechanical components is monitored by analyzing the voltage output of an electrical generator of the aircraft. Alternative generators, for a turbine-driven rotor aircraft,...
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5390543 |
Method and apparatus for in-flight shake testing of an aircraft fuselage
A force-generating actuator connected at or across points of a structure capable of relative motion at an exciting frequency is operated to input a predetermined load into the structure and the...
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5383133 |
Integrated vibration reducing and health monitoring system for a helicopter
This invention monitors data produced by a vibration reducing system relating to the vibration of a structure, compares the data against a predetermined value and provides a warning if the...
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5293555 |
System and method for locating material fatigue using multiple sensors
A system for locating a fatigue point on a structure (10) employing a smart sensor patch (12) having three triangularly adjacent acoustic sensors (40 a,b,c). The smart sensor patch (12) has a local...
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5207100 |
Method and device for measuring underwater vehicle hull vibration
A method and device for measuring higher mode vibrational energy is provi. The device includes a plurality of sensors placed with uniform spacing around the circumference of a structure and a...
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5195046 |
Method and apparatus for structural integrity monitoring
A system is disclosed for monitoring a structure and detecting disturbances and faults associated with such structure. The system includes an actuation device for mechanically exciting the...
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H001006 |
Multilevel classifier structure for gas turbine engines
A signal classifier system is disclosed that includes an on-line apparatus for monitoring various electrical signal inputs derived from vibration signals without data interruption, and providing an...
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5069071 |
Vibration monitoring in the frequency domain with a capacitive accelerometer
A vibration monitoring system employing a capacitive accelerometer determines the energy associated with one or more frequency components within the frequency spectrum of the vibration signal. The...
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5067352 |
Ultrasonic control head for parts whose shape evolves during production
So as to control parts of any form, such as panels made of a composite material, a control head (10) is used comprising a small bar made of an elastic material, aligned ultrasonic transducers (18)...
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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...
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4894787 |
Automatic load monitoring system with remote sensing
A novel system for determining the magnitudes of loads on rotating helicopter components from signals remotely measured on the helicopter fuselage is characterized by a processor which decomposes...
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4811605 |
Apparatus and method for inspecting the degradation of a gas nozzle
The present disclosure describes an apparatus and a method for inspecting the degradation of a gas nozzle. The nozzle is of the type that can produce a whistle when a gas is blown through the...
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4809553 |
Flutter exciter
A flutter exciter induces vibration either for actual aircraft flight testing or for wind tunnel model testing. The basic flutter exciter unit is a pair of rotatable concentric cylinders mounted on...
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4715228 |
Inspection apparatus
It is common practice to pass an ultrasonic probe over a workpiece so as to enable examining of the material for faults such as flaws within the material thickness. Known apparatus for achieving...
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4685966 |
Surface tracking apparatus
Apparatus for continuously orienting an ultrasonic transducer so that the emitted ultrasonic waves remain at a normal angle of incidence to the opposing surface of an object while the transducer is...
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4651566 |
Portable impedance meter for non-destructive testing of sound absorbing panels
A portable acoustic impedance measuring device 10 is provided for measuring the impedance properties of a panel 12. The device 10 includes a horn section 14 having a flexible plate 18. The plate 18...
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4644794 |
Acoustic guide for noise-transmission testing of aircraft
The invention is an apparatus which allows selective testing of aircraft or other vehicular components without requiring disassembly of the vehicle or components. The invention consists of a...
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4604896 |
Rotor blade test apparatus
A rotor blade test apparatus having a striking solenoid to strike a rotor blade to generate an audio signal. A microphone receives the audio signal and applies it to a spectrum analyzer wherein the...
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4524620 |
In-flight monitoring of composite structural components such as helicopter rotor blades
The apparatus comprises one or more acoustical transducers associated with a particular interchangeable rotor blade for monitoring acoustic emissions emitted by the rotor blade under operating...
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4523473 |
Magneto-elastic material defect detector
A dark-field magneto-elastic non-destructive testing technique for detection of defects in a conductive material by inducing eddy currents or applying an electric current to the material along a...
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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...
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4481817 |
Workpiece loading apparatus
Workpiece loading, particularly for dynamic testing of aircraft wings, is described. A double ended servo jack is drivably coupled to an upper drive lever which is pivotally mounted for movement...
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