| Patent application number | Description | Published |
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| 20080266695 | MAGNETIC SENSOR CONTROL DEVICE - A magnetic sensor control device has an input section, a selection section, a calculation section, and a setting section. The input section inputs a plurality of magnetic data each having 3 components sequentially output from a 3-dimensional (3D) magnetic sensor. The selection section selects 4 magnetic data satisfying a predetermined 4-point selection condition from the plurality of the input magnetic data. The calculation section calculates a center point equally distant from 4 points corresponding to the 4 selected magnetic data. The setting section sets 3 components representing the center point as an offset of the magnetic data. | 10-30-2008 |
| 20100002015 | ORIENTATION-FOLLOWING DISPLAY APPARATUS, ORIENTATION-FOLLOWING DISPLAY METHOD, AND ORIENTATION-FOLLOWING DISPLAY PROGRAM - A display device has a screen that can be positioned in arbitrary postures including a reference posture relative to a space having a reference horizontal orientation. The screen has an xyz orthogonal coordinate system, and the posture of the screen in the space is defined by z-x-z Euler angles α, β, and γ of the xyz orthogonal coordinate system. The screen displays an image to enable recognition of the reference horizontal orientation of the space. A control device derives a specific parameter α+γ as an angle by which the image is rotated so that the reference horizontal orientation recognized from the image follows the reference horizontal orientation of the space when the image is displayed on the screen at arbitrary postures. | 01-07-2010 |
| 20110010121 | MAGNETIC DATA PROCESSING DEVICE, MAGNETIC DATA PROCESSING METHOD, AND MAGNETIC DATA PROCESSING PROGRAM - In a magnetic data processing device, an accumulating part sequentially acquires magnetic data output from a 3D magnetic sensor to provide a recent statistical population of the magnetic data. A past statistical population storage part stores, as a past statistical population, magnetic data output from the 3D magnetic sensor prior to the magnetic data accumulated as the recent statistical population. A determination part determines whether a distribution of the recent statistical population satisfies a certain condition, and determines whether a mixed statistical population of the past and recent statistical populations satisfies another condition when the recent statistical population does not satisfy the certain condition. An offset derivation part derives an offset of the magnetic data based on the recent statistical population when it satisfies the certain condition and derives an offset of the magnetic data based on the mixed statistical population when it satisfies said another condition. The past statistical population storage part updates the past statistical population using the recent statistical population. | 01-13-2011 |
| 20110015888 | MAGNETIC DATA PROCESSING DEVICE, MAGNETIC DATA PROCESSING METHOD, AND MAGNETIC DATA PROCESSING PROGRAM - In a magnetic data processing device, an accumulation part repeatedly accumulates a predetermined number of magnetic data to provide a statistical population, while sequentially acquiring magnetic data output from a 3D magnetic sensor. A determination part determines, when the predetermined number of magnetic data is accumulated as a statistical population, whether or not the statistical population is spread two-dimensionally using a first threshold, and determines, when the statistical population is spread two-dimensionally, whether or not an angle between a first plane and a second plane is small to a negligible extent using a second threshold, the first plane including a circle about which the statistical population is concentrated, and the second plane being perpendicular to a line segment connecting a center of the circle and a current offset of the magnetic data. An offset update part updates the current offset based on the statistical population so that the current offset moves in a direction parallel to the first plane as a result of updating, in case that the statistical population is spread two-dimensionally and the angle between the first plane and the second plane is not small to the negligible extent. | 01-20-2011 |
| 20110015895 | MAGNETIC DATA PROCESSING DEVICE, MAGNETIC DATA PROCESSING METHOD, AND MAGNETIC DATA PROCESSING PROGRAM - In a magnetic data processing device, an accumulating part repeatedly accumulates a predetermined number of magnetic data q | 01-20-2011 |
| Patent application number | Description | Published |
|---|
| 20080215287 | MAGNETIC DATA PROCESSING DEVICE, METHOD, AND PROGRAM, AND MAGNETIC PROCESSING SYSTEM - A magnetic data processing device sequentially receives magnetic data samples each of which is three-dimensional vector data represented by a linear combination of fundamental vectors and which are outputted from a three-dimensional magnetic sensor. The magnetic data processing device defines a statistical population which includes a plurality of the magnetic data samples sequentially inputted and which signifies a rotation of the three-dimensional magnetic sensor of a predetermined range, and operates when a distribution of the magnetic data samples of the statistical population is flat, for deducing a direction perpendicular to a plane which approximates the flat distribution of the statistical population, as vertical-direction data representing a vertical direction. | 09-04-2008 |
| 20080316629 | MAGNETIC DATA PROCESSING APPARATUS, METHOD AND MACHINE READABLE MEDIUM - In a magnetic data processing apparatus, an input part successively inputs magnetic data from a magnetic sensor. A first generation part stores samples of the magnetic data in accordance with a first sampling rule, and generates first offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a first feature. A second generation part stores samples of the magnetic data in accordance with a second sampling rule, and generates second offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a second feature. An update part updates an offset value of the magnetic data based on the first offset update data when the same is generated, and updates the offset value of the magnetic data based on the second offset update data when the same is generated. | 12-25-2008 |
| 20090088975 | NAVIGATION DEVICE - In a navigation device, the position P | 04-02-2009 |
| 20090171608 | MAGNETIC DATA PROCESSING DEVICE, MAGNETIC DATA PROCESSING METHOD, AND MAGNETIC DATA PROCESSING PROGRAM - In a magnetic data processing device, a magnetic data input part sequentially receives magnetic data output from a three-dimensional (3D) magnetic sensor. A storage part stores a plurality of the magnetic data as a data set of statistical population. An acceleration data input part receives acceleration data output from a 3D acceleration sensor. A reliability determination part derives a reliability index that is a function of an angular difference between a direction of a line perpendicular to an approximate plane representing a distribution of the data set of the statistical population and a direction of acceleration represented by the acceleration data. | 07-02-2009 |
| 20090172505 | MAGNETIC DATA PROCESSING DEVICE, MAGNETIC DATA PROCESSING METHOD, AND MAGNETIC DATA PROCESSING PROGRAM - In a magnetic data processing device, an input part sequentially receives magnetic data output from a magnetic sensor. A storage part stores a plurality of the magnetic data as a data set of statistical population. An index derivation part derives a distribution index of the data set of the statistical population. A reliability determination part determines whether or not reliability of the data set of the statistical population is acceptable based on the distribution index and a decision criterion. A decision criterion setting part increases strictness of the decision criterion when the reliability determination part determines that the reliability of the data set of the statistical population is acceptable, and decreases the strictness of the decision criterion when the reliability determination part determines that the reliability of the data set of the statistical population is unacceptable. | 07-02-2009 |
