| Patent application number | Description | Published |
|---|
| 20080315718 | Sensing systems utilizing acoustic wave devices - A sensing system includes an acoustic wave device comprising a body of piezoelectric material, and a first electrode assembly mounted on the piezoelectric body whereby an appropriate input applied to the electrode assembly produces an acoustic wave in the piezoelectric body and a first frequency response. The acoustic wave device also has a second electrode assembly to produce a second frequency response, the second electrode assembly being in contact with an area sensitive to a supplied stimulus to cause a characteristic of the sensitive area to change when a supplied stimulus is sensed to thereby change the second frequency response. The acoustic wave device has an output connected to the input of an amplifier, the amplifier having an output connected to the input of a coupling device. The coupling device is connected to the input of the acoustic wave device and has an output connected to a detector. The acoustic wave device, the amplifier and the coupling device are configured to be in an “off” condition when no supplied stimulus is sensed by the sensitive area of the acoustic wave device and to be in an “on” condition when a supplied stimulus is sensed by the sensitive area. The coupling device is configured to send a change signal to the detector when a change from the “off” condition to the “on” condition occurs. | 12-25-2008 |
| 20090009268 | Acoustic wave sensor assembly utilizing a multi-element structure - An acoustic wave sensor assembly includes piezoelectric material, a first acoustic wave resonator element structure mounted on the piezoelectric material for interacting with an electrical signal, the acoustic wave resonator element structure being operable to interact with an acoustic wave propagating within the piezoelectric material to produce a first frequency response. Further acoustic wave resonator element structures are mounted on the piezoelectric material for interacting with electrical signals, the further acoustic wave resonator element structures being operable to interact with further acoustic waves propagating within the piezoelectric material to produce subsequent frequency responses. The first acoustic wave resonator element structure and further acoustic wave resonator element structures are combined to form a ladder or lattice filter network to produce an overall frequency response. Sensitive areas are mounted on the piezoelectric material and associated with the acoustic wave resonator element structures which, if predetermined effects to be sensed or detected are present, are modified thereby to control the nature of the frequency responses with resultant specific perturbations of the combined frequency response and thereby provide information with respect to the predetermined effects to be sensed or detected. | 01-08-2009 |
| 20100154545 | DIFFERENTIATION AND IDENTIFICATION OF ANALOGOUS CHEMICAL AND BIOLOGICAL SUBSTANCES WITH BIOSENSORS - A biosensor for detecting particular substances biosensor comprises a piezoelectric material, an input transducer supported by the piezoelectric material to receive an input signal and propagate a corresponding acoustic wave within the piezoelectric material and an output transducer supported by the piezoelectric material to receive the acoustic wave. At least two chemically orthogonal or semi-orthogonal biolayers are supported by the piezoelectric material to receive substances to be tested and cause corresponding changes in the acoustic wave. The output transducer can transmit a corresponding output signal embodying separate channel data indicative of the substances received. | 06-24-2010 |
| 20100178688 | ACOUSTIC WAVE BIOSENSOR FOR THE DETECTION AND IDENTIFICATION OF CHARACTERISTIC SIGNALING MOLECULES IN A BIOLOGICAL MEDIUM - An acoustic wave biosensor comprises a plurality of spaced apart electrodes disposed on a substrate of piezoelectric material and having a biolayer matched to a specific type of autoinducer signaling molecule to be detected. The biolayer comprises a layer of heterobifunctional molecules disposed on the electrodes and on the piezoelectric material between the electrodes, and a plurality of bioreceptor molecules which bind exclusively with the specific type of autoinducer signaling molecule to be detected. The bioreceptor molecules are supported by the layer of heterobifunctional molecules, and a hydrogel layer surrounds the bioreceptor molecules to support a three-dimensional structure thereof. The bioreceptor molecules can bind with the specific type of autoinducer signaling molecule to be detected, and the biolayer is reactive thereto such that corresponding autoinducer signaling molecules bind to the biolayer and detectably vary acoustic characteristics of the acoustic wave biosensor. | 07-15-2010 |
| 20100220772 | Wireless Communication System Using Surface Acoustic Wave (SAW) Second Harmonic Techniques - A system is for encoding information on a passive surface acoustic wave (SAW) device. The system includes a requesting unit configured to wirelessly transmit an impulse signal. The impulse signal is a signal that includes only a single pulse. A SAW device has an interdigital transducer (IDT) configured to physically store coded data. The SAW device is configured to receive the impulse signal. In response to receiving the impulse signal, the SAW device excites the IDT to generate a coded signal that includes the stored coded data and frequency components at a fundamental frequency. | 09-02-2010 |
