Class / Patent application number | Description | Number of patent applications / Date published |
073589000 | Acoustical impedance | 12 |
20080229831 | Design and deposition of sensing layers for surface acoustic wave chemical sensors based on supra-molecular chemistry - The design and deposition of a sensing layer for room temperature SAW/BAW chemical sensors utilizing macrocyclic compounds in accordance with supra-molecular chemistry principles. The gas to be sensed is attached to the organic sensing film thus changing its visco-elastic properties and creating a mass increase of the film deposited on the surface of SAW/BAW devices. A direct printing method can be used as an additive, mask-less procedure to deposit metallic interdigital transducers and electrodes required for SAW/BAW devices, along with the deposition of a guiding layer and the organic films only on the location required by the sensing SAW/BAW principle of the sensor. Different thermal treatment solutions can be used for the consolidation of the gelly organic films deposited by the direct printing methods. | 09-25-2008 |
20100229648 | DEVICE CONTAINING A FLUID REFRACTING ULTRASOUND MODALITY - An acoustic device is disclosed having a variably refracting acoustic fluid interface including the boundary between two separate fluid media, means for directing acoustic waves onto the interface, and an acoustic generator or transducer located in one of the fluid media with the acoustic generator having an impedance that is substantially equal to the one said fluid media to minimize signal loss and reflection. | 09-16-2010 |
20110005320 | Apparatus and method for engaging acoustic vibration sensors to skin - A system comprising a viscoelastic interface sheet to engage a sound vibrations sensors array to a sound generating objects. The structure of the interface sheet includes elements for easy handling, positioning and mounting. A device for storage and mounting support of such interface sheets is disclosed. | 01-13-2011 |
20110030477 | ULTRASOUND INSPECTION METHOD AND APPARATUS - A method of inspecting a component, the component comprising a hole with an entrance. The method comprises: directing ultrasound into the component via a liquid coupling medium; receiving ultrasound from the component via the liquid coupling medium; and processing the received ultrasound to determine a property of the component. The entrance of the hole is sealed with tape to prevent the liquid coupling medium from flowing into the entrance of the hole. | 02-10-2011 |
20110192231 | ACOUSTIC IMPEDANCE SENSOR DESIGNED TO MEASURE THE INPUT ACOUSTIC IMPEDANCE OF A WAVEGUIDE - The present invention concerns an acoustic impedance sensor designed to measure the input acoustic impedance of a waveguide. This sensor is characterised in that the source is a piezoelectric pellet that makes it possible for the determination of the acoustic impedance of a passive acoustic element to remain coherent for low frequencies while preserving an inexpensive implementation of the sensor. | 08-11-2011 |
20110226061 | SHEET PROCESSING DEVICE - According to one embodiment, there is provided with sheet processing device including an ultrasonic wave generator, a detecting array and a judging unit. The ultrasonic wave generator irradiates ultrasonic waves to a sheet being conveyed, from one side of the sheet. The detecting array is arranged in the other side of the sheet and detects sound pressure of the ultrasonic waves passing through the sheet. The judging unit judges a state of the sheet by comparing a predetermined standard value with the sound pressure. | 09-22-2011 |
20120017684 | SENSOR DEVICE AND METHOD FOR OPERATING A SENSOR DEVICE - A sensor device described having a sensor, in particular an ultrasound sensor, having a generating and detecting arrangement to generate and detect waves, in particular sound waves, the detection arrangement converting received waves into electric signals, and the electric signals being evaluable by an evaluation unit. A function-monitoring device is configured to determine an impedance characteristic curve of the sensor as a function of an excitation frequency is provided. Also described is a method for operating the sensor device. | 01-26-2012 |
20120180569 | ULTRASONIC WAVE SENSOR AND METHOD FOR ATTACHING ULTRASONIC WAVE SENSOR - An ultrasonic sensor of the present invention is attached to the back face of a bumper | 07-19-2012 |
20130133428 | FINGERPRINT DETECTION SENSOR AND METHOD OF MANUFACTURING THE SAME - There are provided a fingerprint detection sensor and a method of manufacturing the same. The fingerprint detection sensor includes a plurality of piezoelectric sensors arranged in an array on a two-dimensional plane and having a predetermined height; a filler provided to surround the plurality of piezoelectric sensors and isolating vibrations between the plurality of piezoelectric sensors; and a control unit discharging predetermined output signals through the piezoelectric sensors to detect information of an object in contact with, or close to, the plurality of piezoelectric sensors, wherein the plurality of piezoelectric sensors include first surfaces and second surfaces disposed on both ends thereof in a height direction and areas of the first surfaces and the second surfaces are different from each other. | 05-30-2013 |
20130298679 | Acoustic Coin Sensor - The present subject matter relates to a capacity detector, a waveguide and a manifold for use with a coin sensor as well as methods for sensing a capacity of a coin receptacle. In one aspect, the waveguide for use with a coin sensor comprises an excitation end for receiving an acoustic signal, a horn end for disposition adjacent to a coin receptacle, and a conduit interconnecting the horn end and the excitation end. In embodiments, the horn end of the waveguide may define a horn selected from a tapered horn, an exponential horn, a tractrix horn, or a modified tractrix horn. | 11-14-2013 |
20160003778 | OBSTACLE DETECTION DEVICE - An obstacle detection device includes an air-coupled ultrasonic wave sensor | 01-07-2016 |
20160077056 | METHOD OF USING DUAL-PORT MEASUREMENT SYSTEM TO MEASURE ACOUSTIC IMPEDANCE - A method of using a dual-port measurement system to measure acoustic impedance is used to measure an acoustic impedance Z of a tested object. The tested object includes an input end and an output end opposite to the input end. The dual-port measurement system comprises a first impedance tube and a second impedance tube. The first impedance tube includes a first inlet where a plane wave of a sound source is input, and a first outlet connected with the input end. The second impedance tube includes a second inlet connected with the output end, and a second outlet where the plane wave is output. The method uses the dual-port measurement system and a two-boundary method to obtain the acoustic impedances Z, whereby the dual-port measurement system is conveniently applied to various fields, such as the design of earphones, muffler tubes, sound absorption materials, and artificial ears. | 03-17-2016 |