345 results about "Mechanical wave" patented technology

An orthopedic surgical device with compound ultrasound vibration that comprises a handpiece, a surgical cutter fixed on the anterior top of the handpiece, and an ultrasound signal generator. Inside the outer casing of said handpiece, there are provided: an ultrasound transducer for transforming the ultrasound signals from said ultrasound signal generator into ultrasound mechanical waves; a horn (or amplitude transformer) for amplifying vibration amplitude of ultrasound mechanical waves generated from said transducer and then transmitting the amplified ultrasound mechanical waves to said surgical cutter to lead to longitudinal vibration of the surgical cutter; a driving motor fixed in the back end of said handpiece for driving said ultrasound transducer and horn to accomplish the movement of swing and rotation; an adapter provided between said driving motor and said transducer for supplying ultrasonic electrical signals generated by said ultrasound signal generator to said ultrasound transducer.

A chest piece for a stethoscope has a housing with a cavity. The cavity has a cavity surface which is paraboloid in shape, having an apex, an axis, and a focal point. The cavity terminates at the apex and an opening, and the focal point resides in the cavity. A transducer is positioned at the focal point. The parabolic shape of the cavity surface acts to reflect sound waves transmitted normal to the opening to the transducer, while reflecting other sound waves. A mechanical wave guide with a series of parallel passages preferably extends across the opening. Preferably, a membrane with a convex surface covers the opening. The cavity is preferably filled with a liquid or gel having physical characteristics similar to human flesh. To reduce noise from motion of the chest piece across the skin, the stethoscope can be activated by a pressure switch responsive to fluid pressure inside the cavity.

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 from the central axis of the machine, the sensors being for sensing acoustic waves and including a transmitter for transmitting signals representing the sensed mechanical waves to a receiver at a location remote from the sensor(s), a data processor connected to the receiver for receiving signals from the receiver which signals represent the mechanical waves and processing the signals to produce output signals for display on a display means, wherein the output signals for display represent one or more parameters indicative of mechanical waves emitted from the machine over a predetermined period of time.

A method of near-field imaging of a region of interest includes emitting an input of near-field electromagnetic radiofrequency energy from a near-field source device into the region of interest, detecting a mechanical wave response generated in the region of interest in response to the near-field electromagnetic energy input using a detector device, and providing image data representing an image of the region of interest based on the mechanical wave response.

The application provides a method and equipment for producing touch feedback and relates to the field of touch feedback. The method comprises the following step: in response to a condition that a user body contacts an object, sending a second mechanical wave used for enabling a first mechanical wave emitted by the user body to form a touch signal on the contact position of the object; according to the method and the equipment, the formed touch signal is sourced from the contact position, so that an effective touch feedback can be formed for the user by use of less energy consumption, and bad experience brought to the user by vibration of the whole object can be avoided.

A space sensor apparatus suitable for a mobile carrier is provided. The space sensor apparatus includes a posture angle calculation module, a position calculation module, and a processing system. The posture angle calculation module calculates the current posture angles of the mobile carrier corresponding to different direction axes in a space according to signals input by one or multiple sensors. The position calculation module calculates the current position of the mobile carrier in the space according to the posture angles and an acceleration parameter and outputs a positioning information to the processing system. The processing system further obtains an environment information through a mechanical wave transceiver. After that, the processing system generates a real-time calculation information for controlling the movement track of the mobile carrier in the space according to the positioning information and the environment information.

The invention discloses a light two-component soft thin layer local resonance acoustic material structure. The same kind of light flexible materials provide weight and elasticity, and another kind of light flexible materials provide a two-component soft thin type local resonance unit with local rigidness. The local resonance unit can control transmission of mechanical waves 2-3 magnitude orders larger than structure size, and a wide band gap is achieved. According to the structure, a full band gap can be opened under the low-frequency stage below 500 Hz, a vertical band gap can be formed at the super-low-frequency stage below 100 Hz, and the requirements for low-frequency damping and noise reducing of thin-wall pieces such as a carrying tool can be well met. The designed structure has the advantages of being low in thickness, light in weight, soft, wide in vertical band gap and convenient to machine, material cost is low, the structure can be directly arranged on carrying tools such as a bus and a train conveniently, and an effective solution is provided for low-frequency damping and noise reducing of a practical carrying tool.

In combined methods for treating a patient using time-varying magnetic field, treatment methods combine various approaches for aesthetic treatment. A magnetic field generating device is placed proximate to a body region of the patient. The magnetic field generating device generates a time-varying magnetic field with a magnetic flux density in a range of 0.5 to 7 Tesla. The time-varying magnetic field is applied to the body region of the patient in order to cause a contraction of a muscle within the body region. A second therapy may be used by applying one or more of optical waves, radio frequency waves, mechanical waves, negative or positive pressure or heat to the body region of the patient.

This document provides novel drills and / or reamers that are well-suited for making holes in a variety of materials including, but not limited to, metals, ceramics, glass, wood, plasterboard, plastics, stone, composites, synthetics, silicon or multi-layered or hybridized substrates. In some embodiments, these drilling devices have some centers of mass that are offset from the axis of rotation. Accordingly, such drills and / or reamers may rotate and cut using a precessional pattern of motion. Precessional cutting devices may display a mechanical wave pattern in relationship to the longitudinal axis of the device. If the cutting device is fabricated from a flexible material, for example Nickel-Titanium, bodily deflection of the device may result during rotation.

The present invention relates to a system and a method of diagnosis for a refrigeration system and / or household appliance which, based on a multiplicity of physical magnitudes detected, determine andinform the operating condition of said refrigeration system and / or of its components. Basically, the magnitudes are divided into two groups, namely: (i) those from which spectral signatures will be generated (magnitudes relating to mechanical vibrations); and (ii) magnitudes from which spectral signatures will not be generated. The spectral signatures are compared with the standard signatures, andthe diagnosis is provided based on this comparison. After the operating condition has been diagnosed, it is stored in a database, and a record of the system operation is updated. The operating conditions are made available for viewing, and based on the record viewed, it is possible to determine whether or not the refrigeration system and / or household appliance and the components thereof are malfunctioning or not. The application further describes a compressor whose diagnosis can' be determined by the method and system of diagnosis according to the present invention.

An integrated circuit is provided which includes one or more device elements formed above a base substrate, a structure forming a sealed cavity above at least a portion of the one or more device elements, and one or more conductive devices formed above the sealed cavity. A method for fabrication of such an integrated circuit is also provided. An exemplary embodiment of the integrated circuit includes a surface acoustic wave device having a plurality of tracks each with a first interdigitated transducer configured to convert a receiving electric field energy into mechanical wave energy and a second interdigitated transducer configured to convert the mechanical wave energy into an output electric field energy. The SAW device also includes a conductor arranged above and spanning across at least two tracks of the plurality of tracks and coupled to the first interdigitated transducers of at least the two tracks.

The invention relates to an ultrasonic flotation method and a device and application thereof, which comprise the following steps: arranging an ultrasonic device in or outside a floatation tank body, starting the ultrasonic device when the floatation device carries out the mineral floatation, using ultrasonic waves to irradiate floatation pulp, providing a high-energy elastic mechanical wave to the pulp, initiating an ultrasonic cavitation effect, generating a large number of cavitation bubble particle flows which flow at high speed, and effectively washing the surfaces of the ore particles in the pulp to enable target ore particles to expose the fresh surfaces; at the same time, using ultrasonic energy to improve the activity of medicament in the pulp, quickening adsorption process of the medicament and the surfaces of the target ore particles to further improve the effects of breaking, restructuring and floating of mineralized bubbles in a pulp system, and thus realizing the optimization of flotation process.

An imaging system comprises a device to excite mechanical waves in elastic tissue, a device for measuring the resulting tissue motion at a plurality of locations interior to the tissue at a number of time instances, a computing device to calculate the mechanical properties of tissue from the measurements, and a display to show the properties according to their location. A parameter identification method for calculating the mechanical properties is based on fitting a lumped dynamic parametric model of the tissue dynamics to their measurements. Alternatively, the mechanical properties are calculated from transfer functions computed from measurements at adjacent locations in the tissue. The excitation can be produced by mechanical vibrators, medical needles or structures supporting the patient. The measurements may be performed by a conventional ultrasound imaging system and the resulting properties displayed as semi-transparent overlays on the ultrasound images.

The invention provides a swing-mechanical wave power generation device, which comprises a case, a generator, an energy-storage flywheel, a one-way movement transfer mechanism, a floater and a connecting rod. The generator, the energy-storage flywheel and the one-way movement transfer mechanism are arranged in the case, the energy-storage flywheel is arranged on an output shaft of the one-way movement transfer mechanism, the generator is connected with the output shaft of the one-way movement transfer mechanism, and the floater is connected with an input shaft of the one-way movement transfer mechanism through the connecting rod. The wave collecting floater is in the shape of a duck belly, so that heaving and rolling movements of waves can be effectively captured. The one-way movement transfer mechanism is adopted to transfer the swing of the duck-belly type wave collecting floater into one-way movement on the output shaft, so that the use efficiency of the wave energy can be greatly increased. The energy-storage flywheel is arranged on the output shaft, so that the output on the output shaft can be more stable, and the stability and efficiency of the system is improved.

The invention discloses a deicing method for a high-voltage line, with the technical proposal as follows: detecting the natural frequency of an ice body; generating a mechanical wave with the same striking frequency with the natural frequency of the ice body for striking the ice body; and shaking off the ice body attached to the high-voltage line. The deicing method comprises the following steps: step 1, striking a barrier in the front, and receiving a reflected wave; step 2, determining whether the frequency of the returned reflected wave is the natural frequency of the ice body; and step 3, adjusting the striking frequency of a striking motor to be identical with the natural frequency of the ice body if the frequency of the returned reflected wave is the natural frequency of the ice body, and striking the ice body. A deicing device for the high-voltage line includes an outer shell (2), and further includes a travel mechanism, a detection and control mechanism and a power supply mechanism, wherein a deicing mechanism is arranged at least at one end of the travel mechanism; the detection and control mechanism is respectively connected with the travel mechanism, the deicing mechanism and the power supply mechanism. The deicing method can remove 70-94% of the ice on the high-voltage line, thereby efficiently reducing the weight of the ice covering the high-voltage line.

A process for preparing the single-mode optical fibre with low polarization mode dispension features that a kneading system installed at downstream of drawing tower has a kneading wheel whose axis is periodically swinging in the plane parallel to drawing direction, and when the keading wheel is driven by high-speed moving optical fibre to show an angle, the generated torsion is transmitted to the softened glass body at upstream to generate the plastic deformation and solidify it in optical fibre, resulting in disordered non-sine torsion distribution to lower the polarization mode dispersion.

A device and method for determining characteristics of a concrete sample includes the use of multiple transducers at pre-determined positions with respect to each other. The transducers are coupled to the concrete surface so that they can impart and / or receive mechanical waves from the sample. Mechanical waves may be imparted to the sample by one or more transducers or by an impact hammer. A control device receives the output from receiving transducers and analyzes data there from to determine a desired characteristic of the sample.

A method for improving fuel collection from an underground deposit comprising stimulating fuel-containing sections of an underground formation, the sections being located between a first well and a second well, the first well being either an injection well or a production well, and the second well being a production well. The method includes arranging a mechanical wave generation device downhole in the first well and arranging at least a first mechanical wave sensor in the production well, injecting a pressurized fluid into the formation from at least the first well, activating the mechanical wave generation device downhole to project mechanical waves into and through the fuel-containing sections, receiving and processing the waves sent from the first well, generating a tomography of the underground environment between the first well and the second well, and collecting fuel in the second well via inflow valves arranged in the second well.

An imaging apparatus (100), configured for thermoacoustic tomographic imaging a region of interest (2) in an object (1), comprises a source device (10) being arranged for emitting an electromagnetic energy input into the region of interest (2), a detector device (20) being arranged for detecting mechanical wave response signals generated in the region of interest (2) along multiple angular projection directions in response to the electromagnetic energy input, and an image data acquisition and processing device (30) being arranged for providing tomographic image data representing the image of the region of interest (2) on the basis of the mechanical wave response signals, wherein the source device (10) is adapted for continuously emitting the electromagnetic energy input with a predetermined input modulation, and the image data acquisition and processing device (30) is adapted for converting the mechanical wave response signals into the frequency domain and for performing data processing and image reconstruction in the frequency domain or in the time domain. Furthermore, an imaging method for thermoacoustic tomographic imaging a region of interest (2) in an object (1) is described.

A vibrator coil (10) is applied to the skull (30) by adaptation of a commercially available transcranial Doppler monitoring harness (40) during MR applies mechanical waves in the acoustic waves through the skull to the brain. Utilizing magnetic resonance elastography (MRE), non-invasive estimation of tissue elastic properties in three dimensions occurs. The propagation of the acoustic waves through brain tissue, coupled to phase alteration of voxel isochromats in the presence of applies motion encoding magnetic field gradients allows measurements of brain elasticity.

The present invention is on an ultra small antenna made of a piezoelectric material. The wavelength of radio signals propagating through the piezoelectric material is shortened because of its high dielectric constant and a resonance between the radio signal and the modes of its mechanical waves at various frequencies results in high amplitude signals in the transmission and reception mode.

The invention discloses a crystalline lens biomechanics and optical property noninvasive in-vivo imaging system and a measuring method. The ultrasonic load system provides mechanical waves capable of enabling a crystalline lens to deform, a spectral domain OCT system achieves the structure and elastic imaging of the crystalline lens; on the basis of the yoke eliminating technology, OCT full-range imaging is achieved, full anterior segment two-dimensional or three-dimensional structure images from the anterior corneal surface to the retrolental surface, morphological and optical characteristic parameters of the crystalline lens are obtained through calculation, and a crystalline lens topographic map is constructed. Meanwhile, the phase sensitive OCT technology is utilized, strain distribution in the depth direction of the crystalline lens is obtained, and a two-dimensional or three-dimensional biomechanical characteristic distribution diagram of the crystalline lens is obtained through rebuilding. High-resolution imaging and precision measurement of biomechanics and optical properties of the crystalline lens provide the more comprehensive and complete imaging surveying basis for fundamental research, early diagnosis, operation plan formulating and postoperation result evaluation of cataract and other crystalline lens diseases, and the important practical significance and clinical significance are achieved.

The mechanical switching equipment for wave energy generator includes one floating ball, one first shaft connected to the floating ball and provided with one first unidirectional clutch and one second unidirectional clutch of opposite rotation directions, one second shaft with one chain wheel and one reversing gear, and one power output shaft with one third unidirectional clutch and one gear type unidirectional clutch. The first unidirectional clutch and the third unidirectional clutch are connected through one chain, the second unidirectional clutch is connected to one chain wheel through the chain, and three shafts are fixed by means of bearings and supported in shore side. When the floating ball is driven by waves to move up and down, the first shaft is rotated, the power output shaft rotates always in one direction owing to the reversing of the clutches and gear, the clutches on the power output shaft prevent the feedback of the power, and the power is output to the generator via one coupling.

Apparatus and method for sterilization of liquid includes a liquid container containing a liquid and having a piezoceramic ring that is connected to a power supply system. Power supply system supplies electric signals to the piezoceramic ring that are transformed into mechanical waves and cause vibrations in the liquid.

An ultrasonic fracking system and methods of using the same to extract hydrocarbons from underground geological formations (e.g., oil shale, coal beds, etc.) are disclosed. The system includes piezoelectric devices that are used to produce ultrasonic mechanical vibrations and induce fractures in the geological formations. In one embodiment, a system for extracting underground hydrocarbons comprises a plurality of piezoelectric devices capable of producing mechanical waves sufficient to fracture oil shale and other geological formations, a system of delivery for innocuous proppants to create a path of least resistance for enhanced hydrocarbon flow, and a vacuum pump connected to the fractures created by the piezoelectric devices to assist in removing the hydrocarbons.

A particular method includes applying light pulses to an optical fiber and receiving backscattered light at a phase-sensitive optical time domain reflectometry (OTDR) device. The backscattered light includes portions of the applied light pulses that are backscattered by the optical fiber. The method also includes determining a difference between the backscattered light and a backscatter pattern associated with the optical fiber. The method also includes determining a communication signal encoded in the backscattered light based on the difference, where the communication signal is encoded in the backscattered light responsive to mechanical waves applied to the optical fiber at a location remote from the phase-sensitive OTDR device.

Provided is a needle-plate electrode medium space charge and partial-discharge ultrahigh-frequency signal synchronous measurement device in the field of electric variable measuring. An inner insulation piece is arranged in the middle of an outer insulation piece in a sleeved mode. The outer side of the inner insulation piece is provided with a tooth structure. The top end of a needle electrode is provided with a metal voltage-sharing ball. The bottom end of the needle electrode penetrates through middle through holes of the inner insulation piece and the outer insulation piece respectively. A height adjusting gear is matched with the tooth structure on the outer insulation piece. By rotating the height adjusting gear, the relative positions of the inner insulation piece and the outer insulation piece are adjusted, the proper distance between the needle electrode and a lower electrode is selected, a voltage pulse is applied at the top end of the needle electrode, vibration of a liquid oil sample to be detected is generated, mechanical wave signals are sent out, the mechanical wave signals are received by a piezoelectric film and are converted into voltage signals, and accordingly space charge distribution in the liquid oil sample to be detected is reflected. Space charge and partial-discharge ultrahigh-frequency signal synchronous measurement under needle-plate electrodes of liquid or solid media is achieved.

The invention relates to a piezoelectric and / or pyroelectric composite solid material, referred to as a hybrid material, including: a solid dielectric matrix (11), a filler of at least one inorganic piezoelectric and / or pyroelectric material, characterised in that said filler includes filiform nanoparticles (12) distributed throughout the volume of the solid dielectric matrix (11) with an amount by volume of less than 50%, and in that the main directions of elongation of the filiform nanoparticles (12) of the inorganic filler distributed in the dielectric matrix (11) have a substantially isotropic distribution in the solid dielectric matrix (11). The invention also relates to a method for manufacturing and using such a hybrid material for the production of structural parts and supported films deposited on the surface of such a substrate for the purpose of: detecting mechanical stress by direct piezoelectric effect; detecting temperature variations by direct pyroelectric effect; creating a mechanical wave by reverse piezoelectric effect in a flexible audio device, in a de-icing device or in a mechanical anti-fouling device; and manufacturing a soundproof material.