1125 results about "Surface acoustic wave sensor" patented technology

An acoustic touch apparatus is provided that includes a substrate capable of propagating surface acoustic waves, such as Rayleigh-type or Love-type waves. The substrate has a front surface, a back surface, and a curved connecting surface formed between the front surface and the back surface. The apparatus also includes at least one acoustic wave transducer and at least one reflective array, the acoustic wave transducer and the reflective array behind the back surface of the substrate. The acoustic wave transducer is capable of transmitting or receiving surface acoustic waves to or from the reflective array. The reflective array is capable of acoustically coupling the surface acoustic waves to propagate from the back surface and across the front surface via the curved connecting surface. Various types of acoustic touch apparatus with edge sensitive touch functions can be provided, according to specific embodiments.

There is presented a high frequency module, in which a recess 2a for mounting power amplifier device is formed on a lower surface of a dielectric substrate 2, and a recess 2b for mounting surface acoustic wave filter is formed on an upper surface of the dielectric substrate 2, and a power amplifier device 4 and a surface acoustic wave filter 8 are mounted through conductive bumps 3a and 3b on the recesses 2a and 2b, respectively. In addition, a through-hole conductor 11 whose one end is exposed at the lower surface of the dielectric substrate 2 is provided between the recesses 2a and 2b. The exposed end of the through-hole conductor 11 is attached to a thermal dissipation conductor 15 on an upper surface of an external electric circuit board 7 through a brazing material 13.

The present invention relates generally to methods and compositions for analyzing test samples containing target analytes including proteins and nucleic acids. The invention uses a surface acoustic wave sensor in combination with a hydrogel to obtain an ultra sensitive non-fluorescent detection system.

An apparatus for manipulating particles within a fluid sample includes a substrate having a substrate surface. A surface acoustic wave (SAW) generator generates a SAW within a SAW region of the substrate surface. The SAW has an SAW direction aligned with a pressure node. A channel is configured to receive the fluid sample and the fluid sample has a flow direction which is at an oblique angle to the SAW direction.

An object of the present invention is to provide a coordinate input device of touch-type capable of giving an electric signal to a transducer, even if a piezoelectric vibrator having electrodes on both surfaces thereof is employed.A device according to the present invention comprises: acoustic wave transducers (piezoelectric vibrators) 3a and 4a, each functioning for oscillating a bulk wave (a first wave) toward a top surface 2 of a substrate 1; a planar wiring 7 formed on a back surface of the substrate 1 by the method such as transfer printing with conductive paste, for supplying said piezoelectric vibrator with electric power; a connecting device 8 for connecting said planar wiring with an electrode of each of said acoustic wave transducers 3a and 4a; diffractive acoustic wave mode couplers 9a–10b, each functioning for converting said bulk wave into a surface acoustic wave (a second wave) and vice versa; and a means for detecting a scatter in the surface acoustic wave (the second wave) on the top surface of said substrate. Employing the combination of the planar wiring and the connecting device can resolve the problem of fragility associated with a cable wiring even in the piezoelectric vibrator having the electrodes on both surfaces thereof.

A coordinate input device of touch-type capable of giving an electric signal to a transducer, even if said transducer is disposed on a back surface of a substrate. The device contains acoustic wave transducers (piezoelectric vibrators), each functioning for oscillating a bulk wave (a first wave) toward a top surface of a substrate; a planar wiring formed on a back surface of the substrate by, e.g., transfer printing with conductive paste, for supplying the piezoelectric vibrator with electric power; diffractive acoustic wave mode couplers, each functioning for converting said bulk wave into a surface acoustic wave (a second wave) and vice versa; and a detector to detect scatter in the surface acoustic wave on the top surface of the substrate. Employing the planar wiring allows the wiring to be disposed even on the back surface of the substrate and also it may resolve the problem of fragility associated with a cable wiring.

The invention relates to a drilling information transmitting device in the field of petroleum and natural gas drilling engineering, in particular to a well drilling information acoustic wave transmission relay device based on a drilling string information channel. The well drilling information acoustic wave transmission relay device comprises an acoustic wave sensor, a modulator circuit, a power source and a transmitting transducer assembly, wherein the modulator circuit receives electric signals outputted from the acoustic wave sensor; effective data are obtained after the electric signals are processed, and are transmitted to the transmitting transducer assembly; and the power source is used for supplying power for the acoustic wave sensor, the modulator circuit and the acoustic wave transmitting transducer assembly. The well drilling information acoustic wave transmission relay device can effectively work in an underground complex environment for a long time, the transmission distance of acoustic waves in a drilling string is lengthened, effective detection and directional signal transmission are ensured, and interference of a ring is decreased.

An object of the present invention is to provide a filter that enables to manufacture in a multi-chip package with ease and that is of small size and multi-function or multi-mode. In a constitution of the present invention, a filter comprises a package comprising a base on one main surface thereof a conductor is formed, and a plurality of surface acoustic wave chips comprising a plurality of interdigital transducers formed on one main surface of a piezoelectric substrate, signal terminals disposed on facing sides on the piezoelectric substrate, and ground terminals disposed on the piezoelectric substrate. Here, the plurality of surface acoustic wave chips, at the signal terminals and the ground terminals, is bonded to the conductor in a face down way.

The invention aims at modifying SPUDT-type surface acoustic wave filters in such a way that the wideband filter can be produced with lower insertion loss and a small form factor without substantially enlarging layout. According to the invention, this is achieved by combining the following characteristics: a) the totality of fingers (231-233; 331-333) of each transducer (2; 3) forms a tapering structure and b) the widths and the positions of the fingers are chosen in such a way that the waves reflected on the fingers (231-233; 331-333) together with the waves regenerated by the corresponding source and load resistance (8; 9) result in an lengthening of the impulse response of the filter, which reduces form factor and / or bandwidth. The invention can be used in surface acoustic wave-based components such as wideband bandpass filters and delay lines.

A method and apparatus for improving temperature stability of surface-launched acoustic wave sensors is described. The system includes a plurality of acoustic wave delay lines or resonators coated with identical films which are physically, chemically, biologically, or otherwise sensitive to one or more target chemical or biological analytes. At least one of the delay lines or resonators, referred to herein as reference channels, is used as a frequency reference to which the oscillation frequencies of the remainder of the delay lines or resonators, referred to as sensing channels, are compared. A thin coating of material that is preferably a passivation layer not sensitive to the analytes, is disposed upon the surface-launched acoustic wave sensor. The passivation layer covers sensing films on the reference channels, blocking or impeding interaction of the sensing films and the analytes thereby. The passivation layer is covered by the sensing films on the sensing channels, allowing interaction between the sensing films and the analytes thereby. All reference and sensing channels are preferably configured as oscillators, whereby effects of temperature fluctuation can be reduced significantly through subtractive combination of the reference and sensing channel oscillation frequencies.

An acoustic wave sensor array device is provided for the detection, identification, and quantification of chemicals and biological elements dispersed in fluids. The sensor array device is capable of the simultaneous characterization of a fluid for multiple analytes of interest. A substrate has a plurality of channels formed therein and a sensor material layer applied in a bottom of the channels. The sensor material layer has a shear acoustic wave speed lower than a shear acoustic wave speed in said substrate. The channels may have the same material in each channel or different materials in at least two of the channels. A surface acoustic wave transducer and at least one surface acoustic wave reflector, or at least two transducers is formed on a surface of the substrate opposite the channels at a portion of the substrate that is thinned by the channels, so that the acoustic tracks of the surface acoustic wave device extend along the channels. The response of the surface acoustic wave depends on the response of the sensor material to a sensed fluid supplied to the channels.

A longitudinally-coupled-resonator-type surface acoustic wave filter includes three interdigital transducers provided on a piezoelectric substrate in the direction in which surface acoustic waves propagate. An interdigital transducer disposed at the approximate center among the three interdigital transducers of the longitudinally-coupled-resonator-type surface acoustic wave filter is divided into two parts substantially symmetrically in the propagation direction of the surface acoustic waves and the two parts are connected to balanced signal terminals, respectively. Left and right interdigital transducers of which the polarities are inverted relative to each other are connected to an unbalanced signal terminal to provide a balanced-to-unbalanced conversion function. A reactance component provided on the piezoelectric substrate, inside a package, or outside the package is connected to either of the balanced signal terminals.

A surface acoustic wave device that is small, lightweight and highly reliable, and protects its functional portion. The surface acoustic wave device has surface acoustic wave elements mounted on a circuit substrate. Each surface acoustic wave element includes a frame-like first insulating film furnished to surround functional portions on a chip, and a lid-like second insulating film deposited on the first insulating film so as to cover driving electrodes and surface wave propagation paths of the functional portions, while securing a hollow portion over the functional portions.

A synthetic phased array surface acoustic wave sensor to quantify bolt tension and a method for determining or estimating the tension in bolts using surface acoustic waves (SAWs). The tension is determined or estimated by using the reflection of SAWs created by the bolt head interference with the underlying surface. Increments in the bolt tension raise the points of interaction between the waves and the bolt head (real area of contact), and hence the position of the reflective boundaries. The variations are estimated using known techniques (e.g., linear synthetic array imaging technique). A singular transducer is actuated from predefined positions to produce an array of signals that are subsequently arranged and added to construct an acoustic image.

An assembly and method for array processing of hermetically sealed Surface Acoustic Wave (SAW) Devices employs a non-conductive material having an array of spaced cavities extending into the material for receiving a SAW die face down, in a flip-chip arrangement. Each cavity has a peripheral recess dimensioned to receive a lid for hermetically sealing the die within the cavity. Conductive paths are provided from the interior of the cavity to the surface of the array for providing an electrical contact with the SAW die. Individual SAW devices are then provided by cutting along separation lines between adjacent cavities after a plurality of die have been hermetically sealed within its cavity.

A light emitting golf ball is provided that includes a spherical housing, a fixing container, a light emitting device, a first fitting portion, and a second fitting portion. The light emitting device is disposed in the fixing container and includes an acoustic wave sensor, a controller, one or more light emitting elements and an electricity supplier. When the acoustic wave sensor receives an external acoustic wave signal higher than a predetermined value, it sends out an activating signal to the controller so that at least one light emitting element emits light. This invention is irrelevant to the hitting direction. It has an extremely low defective rate. Furthermore, the product life can be prolonged.

A surface acoustic wave device which occupies a small mounting area and has a low profile, yet having an improved reliability, and can be made available at low cost. The surface acoustic wave device comprises a piezoelectric substrate, a function region formed of comb-like electrodes for exciting surface acoustic wave provided on a main surface of the piezoelectric substrate, a space formation member covering the function region, a plurality of bump electrodes provided on a main surface of the piezoelectric substrate and a terminal electrode provided opposed to the main surface of piezoelectric substrate. The bump electrode and the terminal electrode are having a direct electrical connection, and a space between piezoelectric substrate and terminal electrode is filled with resin. When the above-configured acoustic wave device is applied for a frequency filter, a resonator, in a portable telephone unit, a keyless entry or the like communication apparatus, the overall size of such apparatus can be reduced and a higher reliability is implemented.

A surface acoustic wave filter. The filter includes two filter tracks which are parallel to each other. Each track has an input interdigital transducer, reflector and output interdigital transducer. This distance between the input transducer and output transducer is the same in both tracks. The distance between the output transducer and reflector is different in the two tracks. The electrical connection is in opposite phase in either the inputs or outputs, but not both. Electrode fingers are arranged in groups of two and have widths and spacings related to the wavelength.

Each of excitation elements and receiving elements placed in a frame region of a non-piezoelectric substrate is constructed by forming a comb-like electrode on the front face of a piezoelectric body and forming a plate electrode (solid electrode) on the rear face thereof. The comb-like electrode is composed of a bus electrode and a plurality of V-shaped electrode fingers extended from the bus electrode. Drawn-round wires are provided to connect the comb-like electrode (bus electrode) and plate electrode to external circuits. Surface acoustic waves from the excitation elements located on the upper side and the lower side are simultaneously propagated in two directions respectively and the propagated surface acoustic waves are received by receiving elements located on the left side and the right side respectively.

A duplexer includes two surface acoustic wave (SAW) filters having different center frequencies, a phase matching circuit that matches phases of the two SAW filters, a package in which the SAW filters and the phase matching circuit are housed, the package having a die-attached layer on which a chip of the SAW filters is facedown mounted, and ground line patterns provided on the die-attached layer and an underlying layer that underlies the die-attached layer, the ground line patterns forming inductances.

The invention provides a sensing device of an SAW-type (surface acoustic wave) touch panel, which is in novel reflector distribution. The reflector distribution which is different from the conventional distribution that varies from sparse to dense gradually is in the form of being spaced at equal intervals but including a plurality of sub-reflectors, so that when a vibration wave enters a row of reflectors on the relatively rear side, the reflected vibration wave quantity can still be equal to the reflected vibration wave quantity of a vibration wave entering a row of reflectors on the relatively front side, thereby avoiding the problem caused by the distribution form of the widely-known reflector row.

A system for tracking the position of multiple objects in three dimensional space by transmitting radar interrogation signals having predetermined wave shapes to surface acoustic wave transducers attached to each object. Each transducer includes a unique electrically conductive pattern on one surface of a piezoelectric substrate for selectively responding to the predetermined wave shape of one of the interrogation signals for inducing a surface acoustic wave in the substrate and for thereafter transforming the surface acoustic wave into an electromagnetic response signal having detectable properties that uniquely identify said transducer. The location of each transducer is estimated by measuring the time-of-flight or angle-of-arrival of the radar signals at several measurement stations and producing a position estimate by triangulation.

A sensor, method and system, for measuring certain characteristics of a fluid. The sensor utilizes a piezoelectric device having at least two tightly coupled resonators providing a two pole electric transfer function responsive to an electrical signal coupled to the input resonator. The piezoelectric sensor has a textured entrapment layer, constructed to entrap a known volume of fluid and impart motion to the entrapped fluid as well as to surrounding non-trapped fluid. The common mode frequency shift of the two resonant frequencies is related to mass loading due to the entrapped fluid, while the energy absorbed by the fluid, or a phase shift of one of the resonant frequencies, is related to the viscosity / density product of the fluid. Extracting the viscosity is a matter of mathematical manipulation. By controlling the energy level of the input electrical signal, the viscosity measurement may be conducted at a predetermined shear rate.

A method and system for detecting oil quality. The quality of engine oil can be determined utilizing an acoustic wave sensor to obtain viscosity and corrosivity data associated with the engine oil. The acoustic wave sensor is coated with a material that selectively reacts to at least one type of an acid in order to provide data indicative of the presence of the acids in the engine oil. The etch rate or the corrosivity of the engine oil can be determined based on the frequency data obtained as a result of the frequency measurement utilizing the acoustic wave sensor. The viscosity of the engine oil can additionally be obtained based on a measurement of phase and amplitude obtained from the data utilizing the acoustic wave sensor. The etch rate and the viscosity measurement provide data indicative of the quality of the engine oil.

Sensor systems and methods are disclosed herein, including a sensor chip, upon which at least two surface acoustic wave (SAW) sensing elements are centrally located on a first side (e.g., front side) of the sensor chip. The SAW sensing elements occupy a common area on the first side of the sensor chip. An etched diaphragm is located centrally on the second side (i.e., back side) of the sensor chip opposite the first side in association with the two SAW sensing elements in order to concentrate the mechanical strain of the sensor system or sensor device in the etched diagram, thereby providing high strength, high sensitivity and ease of manufacturing thereof.

The present invention discloses a kind of respiration detecting method and apparatus for diagnosing lung cancer in early stage. The method includes solid phase micro extraction to pre-enrich the exhaled gas of the patient, inserting the solid phase micro extraction with adsorbed organic gas component into hot gas desorbing unit to desorb, separating the desorbed organic gas component with vapor capillary chromatographic column, adsorbing the organic gas component with the organic gas sensing film in the detecting head of one pair of HF delay line ASW sensors to detect the organic gas content, and performing image processing and nerve network mode distinction on 11 kinds of detected lung cancer labeling organic components to diagnose lung cancer patient. The technology of the present invention may be also used for detecting volatile organic matters in other various fields.