Patent application number | Description | Published |
20090133466 | ACCELERATION MEASURING DEVICE - A reference point defined on a two dimensional or three dimensional orthogonal coordinate space and scale reference of respective axes are estimated based on a distribution on the three dimensional orthogonal coordinate space at the time when respective axial components of an acceleration data group comprised of plural acceleration data including multi-axial components and a importance group pertaining to the acceleration data group, and the respective acceleration data are corrected based on the estimated reference point and scale reference of the respective axes. | 05-28-2009 |
20090143972 | Traveling Direction Measuring Apparatus and Traveling Direction Measuring Method - The present invention relates to a traveling direction measuring apparatus usable as a pedestrian navigation system in locations where it is difficult to obtain high positioning accuracy such as inside buildings or around multistory buildings where a GPS cannot be used. An acceleration detecting section ( | 06-04-2009 |
20090271142 | PHYSICAL QUANTITY MEASURING INSTRUMENT AND SIGNAL PROCESSING METHOD THEREOF - The present invention relates to a physical quantity measuring instrument and signal processing method thereof capable of reducing noise components and improving reliability without increasing size or cost of the circuit. A physical quantity detecting unit ( | 10-29-2009 |
20100117638 | MAGNETIC SENSOR AND SENSITIVITY MEASURING METHOD THEREOF - The present invention relates to a magnetic sensor with a sensitivity measuring function and a method thereof. Magnetic sensitivity surfaces detect flux density, and a switching unit extracts magnetic field intensity information of each axis, and inputs it to a sensitivity calculating unit. The sensitivity calculating unit calculates the sensitivity from the magnetic field intensity information about the individual axes from the magnetic sensitivity surfaces. The sensitivity calculating unit includes an axial component analyzing unit for analyzing the flux density from the magnetic sensitivity surfaces into magnetic components of the individual axes; a sensitivity decision unit for deciding the sensitivity by comparing the individual axial components of the magnetic field intensity from the axial component analyzing unit with a reference value; and a sensitivity correction unit for carrying out sensitivity correction in accordance with the sensitivity information from the sensitivity decision unit. | 05-13-2010 |
20100161272 | PHYSICAL AMOUNT MEASURING DEVICE AND PHYSICAL AMOUNT MEASURING METHOD - Even if a measurement data group is not a measurement data group that is obtained in a space where the magnitude of a vector physical quantity to be measured is uniform, an offset with high reliability is estimated. The reliability of the estimated offset is further improved. A vector physical quantity comprised of a plurality of components is repeatedly detected and vector physical quantity data group is obtained, and a difference vector group is calculated from the obtained vector physical quantity data group. A reference point included in the vector physical quantity data group is estimated based on a predetermined evaluation formula using the calculated difference vector group. Whether the calculated difference vector group is suitable for the estimation of the reference point is determined. Only a predetermined difference vector group is output for the estimation of the reference point based on the determination result. | 06-24-2010 |
20100191501 | Traveling direction measuring apparatus and traveling direction measuring method - The present invention relates to a traveling direction measuring apparatus usable as a pedestrian navigation system in locations where it is difficult to obtain high positioning accuracy such as inside buildings or around multistory buildings where a GPS cannot be used. An acceleration detecting section (1) detects 3-axes acceleration of the traveling direction measuring apparatus, which varies with the walking of the pedestrian. An acceleration data acquiring section (2) obtains 3-axes acceleration data repeatedly by the number of prescribed times or more, said 3-axes acceleration data varies with the walking of the pedestrian. A first gravity acceleration calculating section (3) calculates, when the pedestrian is walking with holding the traveling direction measuring apparatus in a generally fixed attitude, gravity acceleration by averaging acceleration data sets during several steps obtained by the acceleration data acquiring section (2). A first moving direction estimating section (4) estimates the moving direction of the pedestrian from frequency components corresponding to the duration of one step of the acceleration data sets projected on a plane perpendicular to the gravity acceleration calculated by the first gravity acceleration calculating section (3). | 07-29-2010 |
20100277163 | Spatial Information Detecting System, its Detecting Method, and Spatial Information Detecting Device - The present invention relates to a spatial information detecting system. A magnetic sensor driving unit drives a magnetic sensor via a multiplexer unit. Signals of the magnetic sensor are converted from analog signals to digital signals, and are transmitted from a data transmitting unit to an arithmetic unit as magnetic data. A Fourier transform unit calculates the amplitudes and phases of a plurality of frequency components of individual axes from the output signal of the magnetic data receiving unit. A magnetic field vector calculating unit calculates signs of the amplitudes of the individual axes from phase relationships between the plurality of frequency components on the individual axes from the output signal from the Fourier transform unit, and calculates the magnetic field vector representing the direction and magnitude of the magnetic field from the signs and amplitudes. A direction calculating unit calculates the direction of the information terminal. | 11-04-2010 |
20140257731 | Offset Estimation Device, Offset Estimation Method, Offset Estimation Program and Information Processing Device - An offset estimation device includes a rotation axis calculation part and an offset estimation part. The rotation axis calculation part is configured to: obtain multiple sets of magnetic data detected by the magnetic sensor and multiple sets of angular velocity data in accordance with the rotation amount of the offset estimation device; and on the basis of an arbitrary magnetic data group of the multiple sets of magnetic data and respective magnetic data corresponding to the magnetic data group, determine multiple rotation axes that pass through the center of a plane passing through the magnetic data group and indicate straight lines perpendicular to the plane. The offset estimation part is configured to estimate the offset of the magnetic data to be outputted from the magnetic sensor on the basis of the multiple rotation axes. | 09-11-2014 |
20140350894 | Sensor Device with Sampling Function, and Sensor Data Processing System Using Same - The sensor device includes a counter for counting the number of count commands used to perform measurements while maintaining among multiple sensor devices the ratio of measurement intervals; a ratio-holding-unit for setting the ratio to a desired ratio and holding respective values of the ratio for each of the multiple sensor devices; a sampling-timing-generating-unit for receiving a count value of the counter and the setting value of the ratio held by the ratio-holding-unit, and for generating a sampling timing signal based on the comparison result between the count value and the setting value; and a sampling-unit for sampling a detection signal detected by the detecting unit, by using the sampling timing signal generated by the sampling-timing-generating-unit. | 11-27-2014 |
20140368370 | Signal Processing Device - There is provided a signal processing device comprising a combination unit ( | 12-18-2014 |