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The invention relates to a welding electrode (1) for a capacitor discharge welding device (100), comprising an electrode shank (10) with a connecting portion (12), a welding cap (11), which is attached to the connecting portion (12) of the electrode shank (10), and also an ultrasonic testing head (18) for transmitting and/or receiving ultrasonic waves, which is arranged within the electrode shank (10), wherein the welding electrode (1) comprises a closable fluid reservoir or a capsule (13), within which the ultrasonic testing head (18) is accommodated and which is at least partially filled with a sound-conducting coupling agent (14). In addition, the invention relates to a capacitor discharge welding device (100), comprising a first welding electrode (1a) and a second welding electrode (1b), which are connected to at least one capacitor.


Mirzania R.,University of Windsor | Shapoori K.,Tessonics Inc. | Malyarenko E.,Tessonics Corporation | Maev R.Gr.,University of Windsor
Ultrasonics | Year: 2015

The main goal of this study is to develop a new image reconstruction approach for the ultrasonic detection of small objects (comparable to or smaller than the ultrasonic wavelength) behind an aberrating layer. Instead of conventional pulse-echo experimental setup we used through transmission, as the backscattered field after going twice through the layer becomes much weaker than the through-transmitted field. The proposed solution is based on the Harmonic Phase Conjugation (HPC) technique. The developed numerical model allows to calculate the amplitude and phase distributions of the through-transmitted acoustic field interacting with the objects and received by a linear transducer array either directly or after passing through an additional aberrating layer. Then, the digitized acoustic field received by the array is processed, phase-conjugated, and finally, numerically propagated back through the medium in order to reconstruct the image of the target objects. The reconstruction quality of the algorithm was systematically tested on a numerical model, which included a barrier, a medium behind it, and a group of three scatterers, by varying scatterer distances from the source transducer, their mutual arrangement, and the angle of the incident field. Subsequently, a set of laboratory experiments was conducted (at transmit frequency of 2 MHz) to verify the accuracy of the developed simulation. The results demonstrate feasibility of imaging multiple scattering objects through a barrier using the HPC method with better than 1 mm accuracy. The results of these tests are presented, and the feasibility of implementing this approach for various biomedical and NDT imaging applications is discussed. © 2015 Elsevier B.V. All rights reserved.


Pantea M.A.,University of Windsor | Maev R.G.,University of Windsor | Malyarenko E.V.,Tessonics Corporation | Baylor A.E.,Detroit Medical Center
Journal of the Acoustical Society of America | Year: 2012

Chest percussion is a traditional technique used for the physical examination of pulmonary injuries and diseases. It is a method of tapping body parts with fingers or small instruments to evaluate the size, consistency, borders, and presence of fluid/air in the lungs and abdomen. Percussion has been successfully used for the diagnosis of such potentially lethal conditions as traumatic and tension pneumothorax. This technique, however, has certain shortcomings, including limitations of the human ear and the subjectivity of the administrator, that lead to overall low sensitivity. Automation of the method by using a standardized percussion source and computerized classification of digitized signals would remove the subjective factor and other limitations of the technique. It would also enable rapid on-site diagnostics of pulmonary traumas when thorough clinical examination is impossible. This paper lays the groundwork for an objective signal classification approach based on a general physical model of a damped harmonic oscillator. Using this concept, critical parameters that effectively subdivide percussion signals into three main groups, historically known as tympanic, resonant, and dull, are identified, opening the possibility for automated diagnostics of air/liquid inclusions in the thorax and abdomen. The key role of damping in forming the character of the percussion signal is investigated using a 3D thorax phantom. The contribution of the abdominal component into the complex multimode spectrum of chest percussion signals is demonstrated. © 2012 Acoustical Society of America.


Grant
Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: NMP.2010.1.2-4 | Award Amount: 4.04M | Year: 2010

Silver nanoparticles and silver based nanostructured composites are being frequently used in a variety of biomedical and industrial applications, such as an antimicrobial agents, lead-free solders, electric contact materials, gas-sensitive sensor, etc. The most complicated Silver using problems are related to: i) recovery of silver from ore waste materials; ii) the controlled synthesis of metal nanoparticles of well-defined size, shape and composition; iii) nanoparticles incorporation to desired implant surfaces; iv) synthesis of Silver based nanostructured composites for industrial purposes. The main goal of the Project is to develop: 1. Clean and efficient procedure of silver recovery from waste: Combined Mechanical Activation Thermal Oxidation Processing jarosite type residues to alleviate and accelerate the following precious metal leaching; 2. Combined nanotechnology of biological synthesis (use of plants for the nanoparticles synthesis) of Ag nanoparticles and its deposition on implant surfaces by electrophoretic and plasma spraying deposition; 3. Nanostructuring technology of Silver based nanocomposites manufacturing for electrical contact applications. Pilot production and trials of developed Ag nanoparticle modified implants and Ag based nanostructured composites: 1. TiO2 and Hydroxyapatite Ca10(PO4)6(OH)2) coated implants which are widely used in orthopaedic surgery because of their good biocompatibility related to the osteoconductive properties of calcium phosphate coating; 2. Ag-SnO contacts for electrical systems; these composites combine high resistance to welding and to electric arch erosion of the refractory phases with the high electric and thermal conductivities.


Wydra A.,Institute for Diagnostic Imaging Research | Malyarenko E.,Tessonics Corporation | Shapoori K.,Tessonics Inc. | Maev R.G.,Institute for Diagnostic Imaging Research
Physics in Medicine and Biology | Year: 2013

The availability of a non-invasive express method for the in vivo measurement of both sound velocity and thickness of the human skull bone would be of great benefit to various transcranial ultrasonic imaging and treatment applications. This paper investigates two ultrasonic methods that measure both parameters and are based on the variable focus technique. All the experiments described in this paper were conducted on specially prepared custom skull bone phantoms, including flat and deformed samples, designed and developed in our laboratory. The first method uses a single immersion 2.25 MHz ultrasonic transducer consecutively focused on the front and back surfaces of the sample. The accuracy and precision of this method are demonstrated via single point measurements on flat samples with and without porosity. The measurement results from a specimen with the randomly curved back surface show the possibility of obtaining the inner profile of the skull bone. The second presented method is a practical modification of the variable focus technique for the linear phased array case. The method was tested on flat and curved skull bone phantoms with and without inner porosity showing higher measurement accuracy and simpler practical realization than its scanning counterpart. © 2013 Institute of Physics and Engineering in Medicine.


A method for imaging a flowing media within static regions includes obtaining a plurality of signals using the speckle properties of the flowing media. The plurality of signals are compared to one another such as by subtraction. The static regions are removed from the plurality of signals by the comparison. The remaining signals are combined (such as by summing) to produce an image of the flowing media.


A method and apparatus for ultrasonic in-process monitoring and feedback of resistance spot weld quality uses at least one transducer located in the electrode assembly transmitting through a weld tip into an underway weld. Analysis of the spectrum of ultrasonic waves provides the operator with an indication of the size, thickness, location, dynamics of formation and quality of the spot weld. The method presents a fundamentally new physical approach to the characterization of the spot weld quality. Together with transmission mode it includes new modes of operation of ultrasonic probes such as a reflection mode and simultaneous use of transmission and reflection modes, and a new physical interpretation of the signal analysis results.


A method for ultrasonic imaging a volume behind a barrier includes placing an array of elements of a probe adjacent the barrier. The local thickness and the sound speed in the barrier are estimated. A plurality of sub-apertures are defined in the array of elements, each sub-aperture defined by a different sub-set of adjacent ones of the array of elements. Ultrasonic waveforms are collected from each of the sub-apertures by focusing each sub-aperture approximately at the inner surface of the barrier. The ultrasonic waveforms through each of the sub-aperture elements are combined to generate a combined A-mode waveform. A profile of an inner surface of the barrier adjacent the probe is extracted based upon the combined A-mode waveforms. A correction is calculated based upon the profile of the inner surface. The volume behind the barrier is scanned using beamforming based upon the correction to generate an image of the volume.


Trademark
Tessonics Inc. | Date: 2014-02-25

DVD players; ticket dispensers; accumulators, electric; accumulators, electric, for vehicles; actinometers; alidades; altimeters; ammeters; anemometers; high-frequency apparatus; testing apparatus not for medical purposes; remote control apparatus; electro-dynamic apparatus for the remote control of signals; monitoring apparatus, electric; sound recording apparatus; distillation apparatus for scientific purposes; diffraction apparatus microscopy; air analysis apparatus; sound transmitting apparatus; apparatus for fermentation laboratory apparatus; breathing apparatus, except for artificial respiration; breathing apparatus for underwater swimming; apparatus and installations for the production of x-rays, not for medical purposes; cash registers; electric apparatus for commutation; intercommunication apparatus; stills for laboratory experiments; projection apparatus; roentgen apparatus not for medical purposes; blueprint apparatus; blinkers signalling lights; stereoscopic apparatus; telephone apparatus; facsimile machines; phototelegraphy apparatus; igniting apparatus, electric, for igniting at a distance; acid hydrometers; salinometers; acidimeters for batteries; aerometers; barometers; anode batteries; galvanic batteries; batteries for pocketlamps; batteries for lighting; solar batteries; batteries, electric; balances steelyards; betatrons; binoculars; electronic tags for goods; magnetic tape units for computers; computer memories; encoded identification bracelets, magnetic; vacuum gauges; electrolysers; variometers; scales; weighbridges; camcorders; video cassettes; video telephones; video screens; viewfinders, photographic; plugs, sockets and other contacts electric connections; micrometer screws for optical instruments; viscosimeters; circuit closers; wavemeters; voltmeters; mechanical signs; switchboxes electricity; current rectifiers; jigs measuring instruments; gas testing instruments; gasometers; galvanometers; heliographic apparatus; hygrometers; hydrometers; weights; holograms; plotters; loudspeakers; range finders; densimeters; densitometers; optical goods; detectors; galena crystals detectors; smoke detectors; slide projectors; dictating machines; dynamometers; floppy disks; sound recording discs; disks, magnetic; optical discs; disk drives for computers; DNA chips; electronic notice boards; identification threads for electric wires; locks, electric; bells warning devices; alarm bells, electric; signal bells; acoustic conduits; mirrors for inspecting work; probes for scientific purposes; buzzers; buzzers, electric; measures; pressure measuring apparatus; simulators for the steering and control of vehicles; inverters electricity; pressure indicators; temperature indicators; incubators for bacteria culture; measuring instruments; mathematical instruments; levelling instruments; interfaces for computers; ionization apparatus not for the treatment of air or water; spark-guards; coaxial cables; fibre optic cables; cables, electric; calipers; calculating machines; pocket calculators; decompression chambers; cinematographic cameras; electronic pens visual display units; holders for electric coils; identity cards, magnetic; video game cartridges; encoded magnetic cards; protective helmets; cathodes; choking coils impedance; coils, electric; electromagnetic coils; computer keyboards; solenoid valves electromagnetic switches; wire connectors electricity; electronic agendas; mouse pads; magnetic encoders; calibrating rings; compact discs audio-video; compact discs read-only memory; comparators; computers; notebook computers; capacitors; contacts, electric; branch boxes electricity; distribution boxes electricity; connectors electricity; junction boxes electricity; accumulator boxes; lasers, not for medical purposes; neon signs; thermionic tubes; thermionic valves radio; amplifying tubes; magnetic tapes; videotapes; surveying chains; rulers measuring instruments; optical lenses; magnifying glasses optics; magnets; mouse computer peripheral; manometers; protective masks; materials for electricity mains wires, cables; material testing instruments and machines; diaphragms for scientific apparatus; metal detectors for industrial or military purposes; metronomes; rules measuring instruments; mechanisms for coin-operated apparatus; micrometer gauges; microprocessors; microscopes; microtomes; microphones; modems; monitors computer hardware; animated cartoons; terminals electricity; junction sleeves for electric cables; cases fitted with dissecting instruments microscopy; headphones; surveyors levels; verniers; sound recording carriers; magnetic data media; optical data media; sheaths for electric cables; identification sheaths for electric wires; weighing machines; furniture especially made for laboratories; shoes for protection against accidents, irradiation and fire; objectives lenses optics; fire extinguishing apparatus; electrified fences; limiters electricity; clothing for protection against accidents, irradiation and fire; clothing especially made for laboratories; ozonisers ozonators; octants; eyepieces; ohmmeters; wrist rests for use with computers; spectacle frames; oscillographs; plumb lines; mirrors optics; spectacles optics; sunglasses; goggles for sports; signalling panels, luminous or mechanical; radio pagers; electronic pocket translators; transmitters telecommunication; transmitters of electronic signals; switches, electric; gloves for protection against accidents; pyrometers; planimeters; plates for batteries; silicon wafers; compact disc players; cassette players; films, exposed; laboratory trays; semi-conductors; polarimeters; circuit breakers; converters, electric; telerupters; food analysis apparatus; diagnostic apparatus, not for medical purposes; distance measuring apparatus; teaching apparatus; time recording apparatus; distance recording apparatus; surveying apparatus and instruments; weighing apparatus and instruments; optical apparatus and instruments; apparatus and instruments for physics; chemistry apparatus and instruments; measuring apparatus; measuring devices, electric; observation instruments; precision measuring apparatus; instruments containing eyepieces; audio and video receivers; prisms optics; printers for use with computers; magnetic wires; wires, electric; conductors, electric; computer software, recorded; computer game programs; computer programs downloadable software; record players; processors central processing units; electronic publications, downloadable; control panels electricity; radar apparatus; vacuum tubes radio; voltage surge protectors; light dimmers regulators, electric; cell switches electricity; relays, electric; safety restraints, other than for vehicle seats and sports equipment; x-ray photographs, other than for medical purposes; rheostats; refractometers; refractors; saccharometers; light conducting filaments optical fibers fibres; signalling whistles; sextants; inductors electricity; fire alarms; signals, luminous or mechanical; sirens; scanners data processing equipment; smart cards integrated circuit cards; connections for electric lines; connections, electric; sonars; sound locating instruments; lighting ballasts; resistances, electric; spectrograph apparatus; speed indicators; alcoholmeters; protection devices for personal use against accidents; audiovisual teaching apparatus; optical glass; glass covered with an electrical conductor; anti-glare glasses; personal stereos; stereoscopes; sulphitometers; hands free kits for phones; spherometers; integrated circuits; printed circuits; counters; tachometers; television apparatus; telescopes; portable telephones; theodolites; thermometers, not for medical purposes; thermostats; transistors electronic; transformers electricity; protractors measuring instruments; battery chargers; electronic power transformers; telephone receivers; quantity indicators; electric loss indicators; light-emitting electronic pointers; clinometers; amplifiers; particle accelerators; sprinkler systems for fire protection; electric installations for the remote control of industrial operations; steering apparatus, automatic, for vehicles; balancing apparatus; video recorders; sound reproduction apparatus; tape recorders; data processing apparatus; oxygen transvasing apparatus; theft prevention installations, electric; time clocks time recording devices; optical character readers; dosimeters; chargers for electric batteries; sound alarms; sounding apparatus and machines; couplers data processing equipment; computer peripheral devices; anti-interference devices electricity; demagnetizing apparatus for magnetic tapes; acoustic couplers; anti-theft warning apparatus; alarms; readers data processing equipment; heat regulating apparatus; bar code readers; optical lamps; cameras photography; photometers; photovoltaic cells; chromatography apparatus for laboratory use; chronographs time recording apparatus; cyclotrons; chips integrated circuits; switchboards; distribution boards electricity; projection screens; radiology screens for industrial purposes; fluorescent screens; screens photography; exposure meters light meters; ducts electricity; galvanic cells; epidiascopes; ergometers. Apparatus for use in medical analysis; galvanic therapeutic appliances; apparatus for artificial respiration; apparatus for the treatment of deafness; physical exercise apparatus, for medical purposes; dental apparatus; surgical apparatus and instruments; resuscitation apparatus; dental apparatus, electric; physiotherapy apparatus; bed vibrators; hot air therapeutic apparatus; diagnostic apparatus for medical purposes; insufflators; traction apparatus for medical purposes; radiotherapy apparatus; apparatus and installations for the production of x-rays, for medical purposes; radiological apparatus for medical purposes; hearing aids for the deaf; hearing protectors; hernia bandages; dental burs; hot air vibrators for medical purposes; vibromassage apparatus; gastroscopes; hemocytometers; dialyzers; orthopaedic articles; surgical implants artificial materials; inhalers; injectors for medical purposes; incubators for medical purposes; obstetric apparatus; electric acupuncture instruments; cutlery surgical; heart pacemakers; catheters; compressors surgical; armchairs for medical or dental purposes; lasers for medical purposes; lamps for medical purposes; ultraviolet ray lamps for medical purposes; furniture especially made for medical purposes; breast pumps; urinals vessels; medical guidewires; pumps for medical purposes; thread, surgical; knives for surgical purposes; scissors for surgery; ambulance stretchers; boots for medical purposes; orthopaedic footwear; clothing especially for operating rooms; blankets, electric, for medical purposes; ophthalmometers; ophthalmoscopes; slings supporting bandages; gloves for medical purposes; cushions for medical purposes; heating cushions, electric, for medical purposes; belts for medical purposes; belts, electric, for medical purposes; aerosol dispensers for medical purposes; arterial blood pressure measuring apparatus; esthetic massage apparatus; massage apparatus; veterinary apparatus and instruments; medical apparatus and instruments; sprayers for medical purposes; receptacles for applying medicines; spirometers medical apparatus; thermal packs for first aid purposes; thermometers for medical purposes; trocars; x-ray tubes for medical purposes; protection devices against x-rays roentgen rays, for medical purposes; filters for ultraviolet rays, for medical purposes; radiology screens for medical purposes; electrodes for medical use; electrocardiographs. Arranging subscriptions to telecommunication services for others; import-export agencies; commercial information agencies; publicity agencies; cost price analysis; rental of advertising space; business auditing; computerized file management; demonstration of goods; opinion polling; marketing studies; business information; commercial information and advice for consumers consumer advice shop; business research; marketing research; business management and organization consultancy; business organization consultancy; business management consultancy; professional business consultancy; organization of exhibitions for commercial or advertising purposes; organization of trade fairs for commercial or advertising purposes; business appraisals; data search in computer files for others; sponsorship search; business management assistance; commercial or industrial management assistance; presentation of goods on communication media, for retail purposes; economic forecasting; auctioneering; sales promotion for others; publication of publicity texts; radio advertising; distribution of samples; direct mail advertising; advertising; on-line advertising on a computer network; advertising by mail order; television advertising; compilation of information into computer databases; business inquiries; systemization of information into computer databases; commercial administration of the licensing of the goods and services of others; administrative processing of purchase orders; public relations; procurement services for others purchasing goods and services for other businesses; outsourcing services business assistance; business efficiency expert services. Computer system analysis; chemical analysis; architecture; authenticating works of art; recovery of computer data; graphic arts design; computer virus protection services; technical project studies; engineering; installation of computer software; material testing; bacteriological research; biological research; mechanical research; physics research; chemical research; research and development of new products for others; technical research; calibration measuring; consultancy services in the field of computer hardware; computer software consultancy; architectural consultation; quality control; vehicle roadworthiness testing; updating of computer software; maintenance of computer software; conversion of data or documents from physical to electronic media; providing search engines for the internet; data conversion of computer programs and data not physical conversion; computer system design; rental of web servers; computer rental; rental of computer software; creating and maintaining web sites for others; surveying.


A method is provided for assessment of quality of an adhesively-bonded lap joint, wherein the joint includes a first metal plate, a second metal plate and an adhesive therebetween. The method includes sending ultrasonic waves normally to the surface of a sample outside of the joint where the sample has a first sample metal plate with the same properties as does the first metal plate at an assessment point of the joint. Reflected waves from the sample joint as a reference waveform are recorded. Wideband ultrasonic waves are sent normally to the surface of the joint at the assessment point. Reflected waves of the ultrasonic waves from the joint are recorded. A waveform of the reflected waves from the joint and reference waveform are analyzed to determine an informative parameter. The informative parameter is compared with a threshold value to assess quality of the joint.

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