Class / Patent application number | Description | Number of patent applications / Date published |
073497000 | Temperature compensator | 12 |
20080302182 | TEMPERATURE COMPENSATION CIRCUIT, TRIMMING CIRCUIT, AND ACCELERATION DETECTOR - A temperature compensation circuit having satisfactory linearity, a trimming circuit including a plurality of temperature gradients, and an acceleration detector having a wide applicable temperature range. A plurality of resistor elements R | 12-11-2008 |
20090031804 | ANGULAR VELOCITY SENSOR AND METHOD OF SETTING TEMPERATURE CHARACTERISTICS OF ANGULAR VELOCITY SENSOR - In a method of setting temperature characteristics of an angular velocity sensor, temperature characteristics of a detuning frequency are acquired. The detuning frequency is a frequency difference between an oscillation frequency of an oscillation circuit including a piezoelectric vibrator and a frequency of a voltage of the piezoelectric vibrator caused by the Coriolis force. The sensitivity to the detuning frequency is acquired. The temperature characteristics of a detection phase are acquired. The detection phase is a phase difference between a Coriolis signal phase that corresponds to a phase angle of a voltage signal and an oscillation signal phase of the oscillation circuit. The sensitivity to the detection phase is acquired. The amount of phase shift of the detection phase is determined so that the change in sensitivity caused by the change in the detuning frequency with temperature is controlled using the change in sensitivity caused by the change in the detection phase with temperature. | 02-05-2009 |
20090090183 | Methods for compensating parameters of operating accelerometer for temperature variations - A method is disclosed in this invention for compensating a temperature dependent variation of an offset V | 04-09-2009 |
20090095076 | Acceleration Sensor Device and Sensor Apparatus - An acceleration sensor device includes: a substrate; and an acceleration sensor chip including an acceleration sensor element which has a weight portion arranged to swing according to acceleration applied, and a seating portion which supports the acceleration sensor element, the acceleration sensor chip being mounted on the substrate. A cushion member is interposed between the seating portion and the substrate, which absorbs any thermal stress occurring when the seating portion and the substrate undergo thermal expansion or thermal contraction. | 04-16-2009 |
20090314082 | VIRTUAL TURBINE SPEED SENSOR - According to one exemplary embodiment, a virtual turbine speed sensor for a multi-stage turbocharger system of an internal combustion engine is disclosed. The multi-stage turbocharger system includes at least two sequential turbochargers each having a compressor and a turbine. The virtual turbine speed sensor includes a compressor efficiency module, an inter-stage air temperature module, and a turbine speed module. The compressor efficiency module is configured to estimate an efficiency of a compressor of a first of the at least two turbochargers. The inter-stage air temperature module is configured to estimate an inter-stage temperature of air between the at least two compressors. The inter-stage temperature estimate is based at least partially on the efficiency of the compressor of the first turbocharger. The turbine speed module is configured to estimate a speed of a turbine of a second of the at least two turbochargers. The speed estimate of the turbine of the second turbocharger is based at least partially on the temperature estimate of air between the at least two compressors. | 12-24-2009 |
20100089155 | Sensor Unit - A sensor unit has a reference base. An acceleration sensor block and angular velocity sensor support rods are arranged on the reference base, using a bottom face and one side face of the reference base as reference faces. Three acceleration sensors, which detect accelerations that act in the directions in which an X-axis, a Y-axis, and a Z-axis extend, are fitted to three faces of the acceleration sensor block, respectively. Three angular velocity sensors, which detect angular velocities about the X-axis, the Y-axis, and the Z-axis, are fitted to boards that are fitted, via rubber bushings serving as vibration-proofing rubber members, to the angular velocity sensor support rods with screws, respectively. | 04-15-2010 |
20110239762 | Method for Determining the Speed of a Vehicle During a Braking Application - A method of determining a speed of a vehicle during braking is provided. A pressure p in a braking device is determined in accordance with the ideal gas equation p·V=n·R·T. V is the volume V of the brake cylinder, n is the mole number n of the gas in the brake cylinder, R is the gas constant R and T is the temperature T. The brake force F is determined from the pressure p in the brake cylinder and from the impacted piston area A of the brake cylinder in accordance with | 10-06-2011 |
20150033848 | OPTICAL SENSOR - An optical sensor having one or more sensing interference elements is disclosed. A first detector function generates a coarse optical path difference signal for example using a discrete Fourier transform of a detected interference spectrum, and a second detector function generates a refined optical path difference signal using the coarse optical path difference signal and for example a cross correlation of the interference spectrum with one or more sets of periodic transfer functions. | 02-05-2015 |
20150040662 | APPARATUS FOR DETECTING ROTATIONAL SPEED AND METHOD FOR MANUFACTURING SAME - An apparatus for detecting rotational speed includes a lead wire having a signal line covered with a sheath layer and a rotational speed detector connected to the lead wire and outputting an electrical signal corresponding to an object rotation. The apparatus for detecting rotational speed further includes a housing having the rotational speed detector inside and a resin stay integrally holding the housing and the lead wire. The resin stay includes at least one hole formed thereon. | 02-12-2015 |
20160116287 | DRIVE APPARATUS, PHYSICAL QUANTITY DETECTION APPARATUS, AND ELECTRONIC APPARATUS - A driver apparatus includes a vibrator and a drive circuit configured to input a drive signal to the vibrator to vibrate the vibrator. The drive circuit includes an output amplifier configured to output the drive signal to the vibrator based on a monitor signal, a power supply unit configured to supply a power supply voltage, and a power supply voltage controller configured to control the power supply voltage and to supply the controlled power supply voltage to the output amplifies. This driver apparatus can increase amplitude of the vibration of the vibrator, and can increase detection sensitivity to a physical quantity detection apparatus including the driver apparatus. | 04-28-2016 |
20160377645 | SYSTEMS AND METHODS FOR NUCLEAR EVENT CIRCUMVENTION IN AN INERTIAL DEVICE - Systems and methods with the ability to raise the set point temperature immediately after a temperature increase due to radiation exposure, thereby reducing T-dot (rate of change in temperature) errors when trying to cool the inertial system back to its original set point temperature. An example system includes an inertial instrument, a sensor that senses if an increased temperature event has been experienced by the inertial instrument, and a controller device that will increase the set point temperature of the inertial instrument based on the determined increase in temperature. The controller device will also maintain the inertial instrument at a temperature associated with at least one of the sensed increased temperature event or the increased set point temperature. | 12-29-2016 |
20220137081 | INERTIAL MEASUREMENT UNIT - An inertial measurement unit includes an angular velocity sensor and an acceleration sensor that output inertial information, a storage portion that stores a plurality of correction parameters related to a range of values of the inertial information, a parameter control portion that selects a selection correction parameter from the plurality of correction parameters, and a correction calculation portion that corrects the inertial information using the selection correction parameter. | 05-05-2022 |