| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073657000 | By frequency or phase shift | 15 |
| 20090272193 | SURFACE ACOUSTIC WAVE SENSOR - A surface acoustic wave sensor detects a mass load on a resonator-type surface acoustic wave filter on the basis of a change in frequency and includes an IDT electrode arranged on a piezoelectric substrate to excite surface waves, an insulating film arranged so as to cover the IDT electrode, and a reaction film which is disposed on the insulating film and which reacts with a target substance to be detected or a binding substance that binds to a target substance to be detected. The reaction film is composed of a metal or a metal oxide. | 11-05-2009 |
| 20100101327 | Differential Mode Laser Detection and Ranging Device - According to one embodiment, a system for measuring vibration includes multiple spatially separated detectors coupled to a differential signal analyzer and a light source. The light source generates a coherent light beam onto a target that is reflected as backscattered light. The differential signal analyzer receives signals from each of the detectors indicative of backscattered light from the target. The differential signal analyzer then applies a phase shift to a subset of the received signals and combines the phase shifted signals with signals from other detectors to form a differential signal representative of physical vibration of the target. | 04-29-2010 |
| 20110041616 | ACOUSTIC SENSOR WITH AT LEAST ONE PHOTONIC CRYSTAL SLAB - An acoustic sensor includes at least one structure including at least one photonic crystal slab and an optical fiber optically coupled to the at least one photonic crystal slab, and having at least one optical resonance with a resonance frequency and a resonance lineshape. The acoustic sensor further includes a housing mechanically coupled to the at least one structure. At least one of the resonance frequency and the resonance lineshape is responsive to acoustic waves incident upon the housing. | 02-24-2011 |
| 20110126631 | OPTICAL DEVICE AND METHOD FOR MEASURING THE ROTATION OF AN OBJECT - Method and optical device for measuring the rotation of an object, include a light source emitting a collimated incident light beam, a reflecting plane optical interface to be fastened to the object, and capable of forming a first reflected beam. The device includes a corner reflector fastened to the object, and having reflecting plane faces capable of forming a second reflected beam, a detection system capable of measuring the displacement Δ | 06-02-2011 |
| 20110174078 | FIBER-OPTIC, DIGITAL SYSTEM FOR LASER DOPPLER VIBROMETERS (LDVs) - An apparatus and method for non-determination of the surface velocity of a target using optical interference and Doppler shifting of the light reflected from the target are disclosed. It may be used to measure small-amplitude, acoustic frequency surface vibrations as well as non-periodic surface vibration. | 07-21-2011 |
| 20110252891 | Method and Apparatus for Determining Topography of an Object - A method for determining the topography of a static surface ( | 10-20-2011 |
| 20110314921 | Method and apparatus for imaging biological data - An imaging apparatus for generating photoacoustic images and ultrasound images that is capable of generating both types of images with high resolution is provided. An ultrasound probe includes a plurality of probe elements. A first phase matching adding section reads out photoacoustic signals from a photoacoustic element data memory, and administers phase matching addition within a first phase matching range. An image processing section generates a photoacoustic image based on phase matched and added data. A second phase matching adding section administers phase matching addition on reflected acoustic signals sampled by a signal obtaining section within a second phase matching range. An image processing section generates an ultrasound image based on phase matched and added data. The first phase matching range is greater than the second phase matching range. | 12-29-2011 |
| 20120103099 | LASER VIBRATION SENSOR, SYSTEM AND METHOD - A laser vibration sensor, system and method of vibration sensing employ a nanostructured resonance interactor. The sensor includes a resonator cavity of a laser and the nanostructured resonance interactor. The resonator cavity has a resonance deterministic of a characteristic of an output signal of the laser. The nanostructured resonance interactor modulates the resonance of the resonator cavity in response to a vibration. A change in the output signal characteristic induced by a resonance modulation is representative of the vibration. The system further includes an output signal detector. The method includes modulating a resonance characteristic of the resonator cavity using a nanostructure that responds to the vibration being sensed. | 05-03-2012 |
| 20120167694 | PHOTOACOUSTIC IMAGING SYSTEM, CODED LASER EMITTING APPARATUS AND PHOTOACOUSTIC SIGNAL RECEIVING APPARATUS - A photoacoustic imaging system comprising a coded laser emitting apparatus and a photoacoustic signal receiving apparatus is provided. The coded laser emitting apparatus comprises an encoding unit, a signal generating unit and a laser light source. The encoding unit is used for generating a coded signal. The signal generating unit is used for generating a modulated signal according to the coded signal. The laser light source is used for generating a laser pulse having a specific coded waveform according to the modulated signal. The photoacoustic signal receiving apparatus comprises a photoacoustic signal receiving unit and a decoding unit. The photoacoustic signal receiving unit is used for receiving a photoacoustic signal generated by an object having received the laser pulse and converts the photoacoustic signal into an electrical signal. The decoding unit is used for performing a decoding operation on the aforementioned electrical signal to generate a decoding result, so that a back-end circuit can construct a photoacoustic image according to the decoding result. | 07-05-2012 |
| 20120186353 | ACOUSTIC SENSOR WITH AT LEAST ONE PHOTONIC CRYSTAL STRUCTURE - An acoustic sensor includes at least one photonic crystal structure and an optical fiber in optical communication with the at least one photonic crystal structure. The at least one photonic crystal structure has at least one optical resonance with a resonance frequency and a resonance lineshape, wherein at least one of the resonance frequency and the resonance lineshape is responsive to acoustic waves incident upon the acoustic sensor. The acoustic sensor further includes an optical fiber in optical communication with the at least one photonic crystal structure. The optical fiber is configured to transmit light which impinges the at least one photonic crystal structure and to receive at least a portion of the light which impinges the at least one photonic crystal structure. | 07-26-2012 |
| 20120240682 | Multipoint Laser Vibrometer with Single Detector - A laser vibrometer makes non-contact measurements of vibrations of a target. A laser produces a laser beam, and a beamsplitter splits the laser beam into a reference beam and a first target beam. A first frequency shifter/splitter splits the first target beam into a pair of target beams each having a frequency different than a frequency of the other target beams. The target beams are reflected from the target to a detector, and the reference beam is combined with the target beams such that the detector receives the target beams and reference beam together. | 09-27-2012 |
| 20130104661 | METHOD AND APPARATUS FOR RANGE RESOLVED LASER DOPPLER VIBROMETRY | 05-02-2013 |
| 20130312529 | METHOD AND SYSTEM FOR THREE-DIMENSIONAL VIBRATION MEASUREMENT USING VIBROMETER - Disclosed herein are a system and method for three-dimensional vibration measurement. The method includes measuring vibration components and shape information at a vibration measurement point of a measurement target by sequentially emitting laser beams to the vibration measurement point of the measurement target at each of three measuring positions for measuring vibration of the measurement target; obtaining transformation matrices between first to third coordinate systems with respect to each of the measuring positions and a local coordinate system with respect to the vibration measurement point of the measurement target, based on the shape information; measuring angles between unit vectors of respective axes of the local coordinate system and direction vectors of the laser beams emitted with reference to the first to third coordinate systems upon measuring the vibration components; and measuring three-dimensional vibration of the measurement target based on the vibration components and the angles. | 11-28-2013 |
| 20140123763 | MOTION/VIBRATION DETECTION SYSTEM AND METHOD - A motion/vibration detection system and method therefore are provided. The system includes a transmitter and a receiver. The transmitter includes a transmit/receive antenna unit and a first oscillator. The receiver includes a receiving unit and a demodulation unit. The transmit/receive antenna unit receives an output signal from the first oscillator and transmits a detection signal. The detection signal is reflected from at least one object under detection into a reflected detection signal, which is received by the transmit/receive antenna unit. The transmit/receive antenna unit injects the reflected detection signal into the first oscillator and accordingly the first oscillator is under a self-injection locking mode. The receiving unit receives the detection signal. The demodulation unit demodulates the detection signal received by the receiving unit into a baseband output signal, to extract at least one motion/vibration information of the objection under detection. | 05-08-2014 |
| 20140202251 | TEST APPARATUS AND A METHOD OF TESTING - An apparatus for testing a test specimen, the apparatus comprising a first fixture comprising a first mounting filament tensionably secured thereto, a second fixture comprising a second mounting filament tensionably secured thereto, and a vibratory energy source adapted to apply vibrational energy to the test specimen. In use the test specimen is mounted to the first and second mounting filaments so that each of the first and second mounting filaments is aligned with a nodal line on the test specimen. | 07-24-2014 |
