| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073504010 | Angular rate using wave or beam motion (e.g., Sagnac type) | 10 |
| 20090133495 | Yaw rate sensor using surface acoustic wave - A yaw rate sensor has two sets of exciting electrodes, perturbative weights and two sets of detecting electrodes on a surface of a piezoelectric substrate. The exciting electrodes excite first surface acoustic waves transmitted through the surface of the substrate in a propagation direction. The weights are oscillated by the waves and excite a second surface acoustic wave, transmitted through the surface of the substrate in a detection direction orthogonal to the propagation direction, in response to a yaw applied to the weights. The detecting electrodes measure an intensity of the second surface acoustic wave to detect the yaw rate. The sets of exciting electrodes are symmetrically placed with respect to a driving axis extending straight along the propagation direction. The group of weights is symmetric with respect to the driving axis. | 05-28-2009 |
| 20090188317 | Apparatus and Method for Detecting a Rotation - A rotation sensor has a substrate with a first surface and a second surface. A shear-wave transparent mirror is arranged on the first surface of the substrate, and a shear-wave isolator is arranged above the shear-wave transparent mirror, the shear-wave transparent mirror and the shear-wave isolator being arranged separated from each other to define a Coriolis zone there between. A bulk-acoustic-wave resonator is arranged above the shear-wave isolator, and a shear-wave detector is arranged on the substrate in a direction, in which a shear-wave generated by the bulk-acoustic-wave resonator upon rotation propagates. | 07-30-2009 |
| 20120160026 | ROTATION DETECTING APPARATUS - A rotation detecting apparatus includes core member having a receiving hole, an inner member that is rotatably supported b the core member, and an outer member that constitutes a wheel bearing device. The rotation detecting apparatus also includes a rotation detecting sensor, an external lead cable that is drawn out from an inner space through the receiving hole in the core member and a sealing member that is secured to an outer peripheral surface of the external lead cable. | 06-28-2012 |
| 20120204639 | Magnetic rotation sensor - The present invention teaches a novel apparatus and method for providing the magnetic impulse required to drive an electronic pickup used to indicate the speed of a bicycle. In a conventional spoked wheel, one of the spokes is fabricated from a magnetic material such that each time that particular spoke passes the pickup the requisite current impulse is transmitted to the handlebar mounted receiving unit. | 08-16-2012 |
| 20130014583 | ANGLE DETECTION METHOD WITH RESOLVERAANM KIMPARA; YoshihikoAACI Chiyoda-kuAACO JPAAGP KIMPARA; Yoshihiko Chiyoda-ku JPAANM HORI; YasuakiAACI Kobe-shiAACO JPAAGP HORI; Yasuaki Kobe-shi JPAANM MORI; TatsuyaAACI TokyoAACO JPAAGP MORI; Tatsuya Tokyo JPAANM KIFUKU; TakayukiAACI Chiyoda-kuAACO JPAAGP KIFUKU; Takayuki Chiyoda-ku JPAANM OKANOUE; TakahiroAACI TokyoAACO JPAAGP OKANOUE; Takahiro Tokyo JP - In an angle detection method with a resolver, the method being for detecting a rotational angle of a rotator by synchronously detecting a first signal and a second signal that are two phase sine wave modulation signals obtained from a one phase excitation/two phase output resolver, the method includes: a first signal detection process which detects a signal in the order of the first signal and the second signal; and a second signal detection process which detects a signal in the order of the second signal and the first signal. | 01-17-2013 |
| 20130081463 | Sensor - An inertial sensor is described that has a commanded test function. The sensor is of a ring type driven by a driver circuit, the sensor further comprising primary and secondary portions having corresponding signal pickoffs. The primary pickoff signal amplitude is controlled via an automatic gain control, the primary phase lock loop and VCO locks to the resonant frequency to provide the clocks for the synchronous detectors, the primary pickoff signals via the primary phase shift circuit is provided to the primary driver, the secondary pickoff signal being input into a detector circuit capable of detecting motion in the sensor. The commanded test function comprises signal derived from the primary portion of the circuit and input into the two inputs of a differential amplifier in the secondary pickoff detector circuit. | 04-04-2013 |
| 20130298669 | INTEGRATED SENSORS AND SENSING METHODS - Embodiments relate to integrated sensors and sensing methods. Embodiments relate to integrated sensor layouts. Embodiments are configured to maximize a ratio of sensor spacing over a die area. While being generally applicable to many different types of sensors, particular advantages can be presented for magnetoresistive (xMR) sensors. | 11-14-2013 |
| 20140116132 | DEVICE FOR MEASURING ANGLE AND ANGULAR VELOCITY OF DISTANCE AND SPEED - A device for measuring angle and angular velocity or distance and speed of a moving part is described. The device has a sensor which is or can be arranged in a stationary manner and an encoder which is or can be arranged on the moving part and, together with the sensor, generates a modulation signal to be demodulated by the sensor. For the frequency measurement which is needed to measure the angular velocity/speed, the encoder has a structure which reproduces a periodic pattern and is interrupted by at least one index area for the angle/distance measurement. In the index area, the encoder has a substitute pattern which differs from the periodic pattern by at least one physical variable which can be detected by the sensor but has a structure which also enables the frequency measurement in the index area. | 05-01-2014 |
| 20150068305 | Saw-Based Tachometer or RPM Detector - A method is provided for determining a number of revolutions per minute (RPM) of a rotating object. The method includes transmitting interrogation signals at a regular period from a fixed antenna positioned adjacent to the rotating object. The method also includes transmitting echo signals from a sensor antenna positioned on the rotating object, in response to the interrogation signals. The method also includes counting a number of echo signals detected by the fixed antenna, during one revolution of the object. The method also includes determining the RPM of the rotating object based on the number of response signals and the regular period of the signals. A system is also provided for determining the number of revolutions per minute (RPM) of the rotating object. | 03-12-2015 |
| 20220136831 | SILICON NITRIDE WAVEGUIDE BASED INTEGRATED PHOTONICS OPTICAL GYROSCOPE CHIP WITH NOVEL MATERIALS FOR PHASE SHIFTER - An integrated photonics optical gyroscope fabricated on a silicon nitride (SiN) waveguide platform comprises a first silicon nitride (SiN) waveguide layer that constitute a rotation sensing element; and, a second SiN waveguide layer with additional silicon nitride (SiN) waveguide-based optical components that constitute a front-end chip to launch light into and receive light from the rotation sensing element. The two SiN waveguide layers can be stacked together to have a multi-layer configuration vertically coupled with each other. External elements (e.g., laser, detectors, phase shifter) may be made of different material platform than SiN and can be hybridly integrated to the SiN waveguide platform. The phase shifters can be made of aluminum nitride (AlN) or strontium bismuth titanate (SBT). | 05-05-2022 |
