77 results about "Shear horizontal" patented technology

A method of performing a non-destructive examination of a piece of material, having the steps of providing an angle beam wedge and at least two transducers placed upon the wedge, wherein the transducers are placed in a phased array, placing the wedge upon the piece of material to be examined, producing a guided wave into the piece of material to be examined, wherein the guided wave is placed into the material through a synthetically changed incident angle, receiving the guided wave from the piece of material, and determining one of a presence of defects and lack of defects in the piece of material from the received guided wave. Transducers used may include 360 degree guided wave, radial polarized units, parallel shear units for shear horizontal activation and guided wave wheel probes.

An integrated multiplexed acoustic wave biosensor chip system with enhanced sensitivity has been developed. The biosensor system incorporates one or more microfluidic channels, coated with target-specific binding films enabling rapid and early detection of viral, bacterial or parasitic targets such as Dengue virus and sexually transmitted diseases in specimens from potentially infected patients. The biosensors are used in portable analytical systems that are suitable for real-time point of care (POC) clinical diagnosis in cost sensitive and / or resource limited settings. The highly sensitive biosensors utilize thinned single crystal piezoelectric substrates that propagate layer guided shear horizontal acoustic plate mode (LG-SH-APM) waves in sensing regions bearing immobilized binders that provide simultaneous and direct detection of mass changes due to multiple bound target pathogens or molecules.

Detection systems and methods for detecting target biological analytes within sample material using acousto-mechanical energy generated by a sensor are disclosed. The acousto-mechanical energy may be provided using an acousto-mechanical sensor, e.g., a surface acoustic wave sensor such as, e.g., a shear horizontal surface acoustic wave sensor (e.g., a LSH-SAW sensor). A variety of techniques for modifying the effective mass of the target biological analytes in sample material are disclosed, including fractionating or disassembling the target biological analytes in the sample material (e.g., lysing the target biological analyte), adding a detectable mass to the target biological analyte or enhancing coupling of the target biological analyte (e.g., through the use of magnetic particles), exposing the sample material to a reagent that causes a change in at least detectable physical property in the sample material if the target biological analyte is present (e.g., a change in viscous, elastic, and / or viscoelastic properties), etc.

A method of performing a non-destructive examination of a piece of material, having the steps of providing an angle beam wedge and at least two transducers placed upon the wedge, wherein the transducers are placed in a phased array, placing the wedge upon the piece of material to be examined, producing a guided wave into the piece of material to be examined, wherein the guided wave is placed into the material through a synthetically changed incident angle, receiving the guided wave from the piece of material, and determining one of a presence of defects and lack of defects in the piece of material from the received guided wave. Transducers used may include 360 degree guided wave, radial polarized units, parallel shear units for shear horizontal activation and guided wave wheel probes.

Methods and apparatus for transmitting power and data along a metal pipe using wideband acoustic waves. Arrangements use shear-horizontal waves, transmitting narrowband signals for power applications and wideband signals for communications having a bandwidth greater than the coherence bandwidth of the acoustic-electric channel. Chirp wave signals, direct sequence spread signals, and on-off keying are used. Acoustic-electric channels include wedges fixed to a pipe or other substrate, transducers fixed to the wedges, and electronics linked to each transducer for sending and receiving power and signals. Matching networks, rectification circuits, and non-coherent signal reception methods may be used.

The invention discloses a slide bar type tensile limiting-displacement vibration isolation support which comprises a vibration isolation rubber pad, an upper steel sheet and a lower steel sheet. The upper steel sheet and the lower steel sheet are anchored to an upper structure and a lower structure. The slide bar type tensile limiting-displacement vibration isolation support is characterized in that the two sides or the periphery of the bottom of the upper steel plate are / is symmetrically provided with slide bars and tensile limiting-displacement mechanisms composed of pull rods and sleeves, wherein the pull rods are provided with sliding grooves; the slide bars are fixedly connected with the upper steel sheet, the sleeves are anchored to the lower structure through bases, and the slide bars are circular rod pieces arranged on a vertical plate; the sliding grooves are clamp grooves formed in one ends of the pull rods and matched with the slide bars, and the sliding grooves are formed in the slide bars in a sleeving mode and connected with the slide bars in a sliding mode. Compared with the prior art, the slide bar type tensile limiting-displacement vibration isolation support is simple in structure and high in horizontal shearing resistance and vertical tensile deformation resistance, the stability of the support is greatly improved, the problems of toppling and ultralimit of tensile stress of the vibration isolation support possibly generated by vibration isolation of a high-rise building are well solved, and the slide bar type tensile limiting-displacement vibration isolation support is especially suitable for application and popularization of laminated rubber vibration isolation supports of high-rise buildings in earthquake regions of high earthquake intensity.

A Love wave sensor uses a single-phase unidirectional interdigital transducer (IDT) on a piezoelectric substrate for leaky surface acoustic wave generation. The IDT design minimizes propagation losses, bulk wave interferences, provides a highly linear phase response, and eliminates the need for impedance matching. As an example, a high frequency (˜300-400 MHz) surface acoustic wave (SAW) transducer enables efficient excitation of shear-horizontal waves on 36° Y-cut lithium tantalate (LTO) giving a highly linear phase response (2.8° P-P). The sensor has the ability to detect at the pg / mm2 level and can perform multi-analyte detection in real-time. The sensor can be used for rapid autonomous detection of pathogenic microorganisms and bioagents by field deployable platforms.

A contact shear horizontal (SH) mode guided-wave magnetostrictive transducer including: a transduction band which is disposed on a surface of an object to be tested and in which electromagnetic acoustic transduction occurs; and radio frequency (RF) coils disposed on the transduction band, wherein the transduction band includes a plate-shaped solenoid including a magnetostrictive strip in which the electromagnetic acoustic transduction for transmitting or receiving SH mode guided waves occurs, and solenoid coil wound in a spiral form along a circumference of the magnetostrictive strip so as to form a bias magnetic field in a lengthwise direction of the magnetostrictive strip, and the RF coils are used to form a dynamic magnetic field in a widthwise direction of the magnetostrictive strip or to detect a change of magnetic flux in the magnetostrictive strip.

A process for a pre-concentration unit including: a sorbent material coated passage-way having an entrance for receiving a hydrocarbon-containing groundwater sample and for pre-concentrating the hydrocarbons in a hydrocarbon-containing groundwater sample by successive sorption / desorption cycles, and having an exit for discharging the pre-concentrated hydrocarbons; a heating unit for heating the sorbent material coated passage-way; and; an array of shear horizontal-surface acoustic wave sensors with coatings adapted for detecting and quantifying the pre-concentrated hydrocarbons, disposed at the exit of the sorbent material coated passage-way; and a housing for enclosing the pre-concentration unit and the array of shear horizontal-surface acoustic wave sensors, adapted for continuous use at a body of hydrocarbon-containing groundwater, and coupled to mathematical methods for generating concentrations of specific analytes from both transient and steady-state signals.

The invention relates to a magnetic driving rotary gas distributor equipment of gas-liquid multi-phase system. It includes a tower device with magnetic driving device, the rotary-type gas distributor can be directly rotated in the tower bottom to make gas distribution. The gas distributor is driven by rotary permanent magnetic field produced by magnetic driving device and rotated so as to implement goal of rotary gas distribution. In the supporting disk of the gas distributor a gas ingress pipe hole is set, and the ring-shaped gas distribution cavity chamber in the supporting disk and the gas-feeding circular hole on the rotary hollow shaft can be used for making gas distribution, in the bottom end of the rotary hollow shaft a cleaning pollution-discharging valve is mounted.

Provided is a transducer. The transducer includes a permanent magnet that generates a magnetostatic field, a patch disposed below the permanent magnet and formed of a material that deforms according to a magnetic field, an insulator disposed on a top surface of the patch, and a coil wound around the patch and the insulator in a certain form and allowing a magnetomotive field to be induced on the patch according to an applied current. The wound coil has a form in which directions of the magnetostatic field generated by the permanent magnet and the magnetomotive field generated by winding the coil are orthogonal to each other.

A transducer is provided. The transducer includes: a permanent magnet unit formed in a form of a circular ring having upper and lower surfaces each having a predetermined diametrical direction width while having a circular through-portion in a central portion of the permanent magnet unit, the permanent magnet unit generating a vertical magnetic flux due to opposite magnetic poles that are formed in the upper and lower surfaces; and a coil wound in a diametrical direction across an area between an inner surface formed by the circular through-portion of the permanent magnet and an outer surface formed by an outer circumference of the permanent magnet and also wound in a circumferential direction of the permanent magnet, wherein the coil comprises a conductive material so that a current is applied to the coil, and when an alternating current is applied to the coil, a direction of the alternating current flowing along the coil and a direction of a magnetic field passing through the coil are orthogonal to each other.

A system and a method for providing information on two of the three variables, density (ρ), viscosity (η), and elastic modulus (c) of a fluid, such that independent knowledge of one variable allows the remaining two variables to be measured by a single sensor. The present invention relies on the interaction of a predominantly shear horizontal acoustic wave device (“quasi-shear-horizontal”) with the fluid, so as to measure subtle differences in the interaction of two or more acoustic resonance states or waveguide modes of a multi-mode resonator or waveguide, and to derive the desired fluid characteristics therefrom. The most preferred embodiment is a dual-mode coupled resonator filter geometry with one resonant mode having a high degree of symmetry and the other having a high degree of anti-symmetry. By combining the additional information of multi-moded operation with the inherent ability of a horizontally-polarized quasi-shear-horizontal acoustic wave device (AWD) to operate in fluid environments, one obtains a multi-mode quasi-shear-horizontal (MMQSH) resonator.

Shear-horizontal surface acoustic wave sensors with micro-cavities in the delay paths were studied using finite element methods. The microcavity devices are SAW delay path devices that have the delay path etched with square patterns at various wavelength dimensions and varying depths to increase the dispersion and bulk to surface wave conversion. Additionally the microcavities are filed with polystyrene to act as an inhomogeneous waveguide for further entrapment of wave energy near the device surface. The effects of micro-cavities and grooves on SAW propagation show significantly greater energy transmission than the other structures presented traditional sensors.

An inspection system includes a magnetostrictive scanner probe, a ferromagnetic strip, at least one magnet, and a processor. The magnetostrictive scanner probe includes a probe body for supporting at least one flexible sensor coil and a position encoder. The ferromagnetic strip is configured to be coupled to a structure, and the at least one magnet is configured to apply a biasing magnetization to the ferromagnetic strip. The processor is configured to cause a time-varying current to be generated in the at least one flexible sensor coil to induce a time-varying magnetization in said ferromagnetic strip perpendicular to said biasing magnetization to generate shear horizontal-type guided wave energy into said structure, and process reflected shear horizontal-type guided wave energy received by the at least one flexible sensor coil as the probe is moved relative to said structure to generate at least one two-dimensional image of a region of said structure.