Yasuhiro Tajima
Yasuhiro Tajima, Nisshin-Shi JP
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20110037646 | INTER-MOBILE BODY CARRIER PHASE POSITIONING DEVICE AND METHOD - The inter-mobile body carrier phase positioning device according to the invention includes: a first observation data acquisition means that acquires observation data concerning a phase accumulation value observed in a first mobile body; a second observation data acquisition means that acquires observation data concerning a phase accumulation value observed in a second mobile body; a satellite pair determination means that determines pairs of satellites used for carrier phase positioning; and a carrier phase positioning means that takes, between each of the pairs of the satellites determined by the satellite pair determination means, a single or double difference between the observation data acquired by the first observation data acquisition means and the observation data ac quired by the second observation data acquisition means, and determines relative positional relation between the first mobile body and the second mobile body by carrier phase positioning using the single or double difference of the observation data. | 02-17-2011 |
20110037647 | RELATIVE POSITION DETECTING APPARATUS, AND RELATIVE POSITION DETECTING SYSTEM - In a case in which three or more movable objects, each of those detecting the relative position with respect to another movable object, are able to communicate with each other: a reference movable object obtains observation data and transmits the observation data to non-reference movable objects; one non-reference movable object calculates the relative position with respect to the reference movable object by performing interferometric positioning using the observation data obtained by the observation data obtaining means and data including observation data received from the reference movable object, and also transmits data including an integer bias calculated as interferometric positioning results to another non-reference movable object and receives reliability determination results regarding the interferometric positioning; and the another non-reference movable object receives data including the integer bias from the one non-reference movable object and determines the reliability of the interferometric positioning. | 02-17-2011 |
20110054790 | INTER-MOVING BODY INTERFEROMETRIC POSITIONING SYSTEM, DEVICE AND METHOD THEREOF - An inter-moving body interferometric positioning system for carrying out positioning in coordination with three or more moving bodies that can mutually communicate, including: a reference vehicle decision unit for deciding on a single moving body to function as a reference vehicle from among three or more moving bodies, and a positioning unit for interferometrically determining respective relative positions of other moving bodies relative to the reference moving body that is to function as a reference vehicle decided on by the reference moving body decision unit using satellite wave monitoring data monitored in each of the three or more moving bodies. This inter-moving body interferometric positioning system specifies relative positions among the other moving bodies using positioning results of the positioning unit. | 03-03-2011 |
20140159886 | DRIVING ASSIST DEVICE FOR VEHICLE - A vehicle operator assisting apparatus is configured to assist an operator of an own vehicle by displaying an image of a virtual preceding vehicle visually recognizable by the operator as if the virtual preceding vehicle was running in front of said own vehicle in a running state. The assisting apparatus comprises: a history data base storing a driving history of said operator; a virtual preceding vehicle control portion determining a running state of said virtual proceeding vehicle based on said driving history generating portion generating a relationship between a distance between said own vehicle and an actual preceding vehicle, and a running speed of said own vehicle, and storing the relationship in said history database. Said virtual preceding vehicle control portion includes a driving characteristics extracting portion determining a distance between said own vehicle and said virtual preceding vehicle based on said relationship. | 06-12-2014 |
Yasuhiro Tajima, Aichi JP
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20100026566 | MOBILE-UNIT POSITIONING DEVICE - In a mobile-unit positioning device, phases of pseudo noise codes carried on satellite signals from satellites are observed at a mobile unit to measure a position of the mobile unit. A pseudo distance between one of the satellites and the mobile unit is measured for every satellite during a stop of the mobile unit using an observed value of the phase acquired during a stop of the mobile unit. An error index value indicating an error of the measured distance is computed based on the distances measured at points in time during a stop of the mobile unit. A weighting factor is determined based on the index value computed for every satellite. A weighted positioning computation using the determined weighting factor is performed to determine a position of the mobile unit during movement using an observed value of the phase acquired during movement. | 02-04-2010 |
20100048140 | DEVICE FOR MEASURING A POSITION OF A MOBILE STATION - A device for measuring a position of a mobile station according to the present invention comprises: first measuring means for measuring the position of the mobile station based on observed data of signals from satellites using a one-epoch measuring method; second measuring means for measuring the position of the mobile station using previous determination result of the position of the mobile station and speed information representative of a speed of the mobile station; third measuring means for measuring the position of the mobile station using solutions of variables derived from previous determination results of the first or second measuring means; and controlling means | 02-25-2010 |
20100169006 | POSITIONING SYSTEM, POSITIONING METHOD AND CAR NAVIGATION SYSTEM - A positioning system | 07-01-2010 |
20120029813 | METHOD FOR JUDGING VEHICLE TRAVELING POSITION AND VEHICLE TRAVELING POSITION JUDGMENT DEVICE - A vehicle traveling position judging method of the present invention is a vehicle traveling position judging method for judging the traveling position of a preceding vehicle, and includes: a relative position information acquisition step of acquiring the relative position information of the preceding vehicle and a host vehicle at a predetermined point in time; a host vehicle traveling trajectory information acquisition step of acquiring traveling trajectory information of the host vehicle after the predetermined point in time; and a preceding vehicle position judging step of judging a traveling position of the preceding vehicle on the basis of the relative position information and the traveling trajectory information of the host vehicle. | 02-02-2012 |
Yasuhiro Tajima, Toyota-Shi JP
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20080258966 | Independent Positioning Device and Independent Positioning Method - A linear regression equation is comprised of the objective variables and the explanatory variables. The objective variables are comprised of the L1 carrier phases, the L2 carrier phases, the C/A code pseudorange, the P(Y) code pseudorange, the clock error data, the delay data of the ionosphere, and the delay data of the troposphere that related with every satellite respectively. The explanatory variables are comprised of at least the integer ambiguity and a receiver's position. | 10-23-2008 |
Yasuhiro Tajima, Aichi-Ken JP
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20080262730 | Mobile Object Position Estimation Apparatus and Method - A mobile object position estimation apparatus mounted in a mobile object includes a first estimation mechanism for estimating the mobile object position based on the outputs from an inertial navigation sensor device (acceleration sensor, and yaw rate sensor, or the like) mounted on the mobile object, a storage for storing map information including at least node information, a second estimation mechanism for estimating the mobile object position based on a predicted path of traveling of the mobile object predicted from the node information, and a synthesis mechanism for determining the final estimated mobile object position by synthesizing the mobile object position estimated by the first estimation mechanism and the mobile object position estimated by the second estimation mechanism. | 10-23-2008 |
Yasuhiro Tajima, Tokyo JP
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20120224074 | MOBILE COMMUNICATION APPARATUS - A mobile communication apparatus comprises: a first camera unit for capturing an image of a subject; a second camera unit for capturing an image of the camera operator or an image of an object possessed by the camera operator; an activation control unit; an operation recognizing unit; and an image capture control unit. The activation control unit controls, in response to an activation instruction, the second camera unit to start an image capture operation and sequentially generate still-image data. The operation recognizing unit compares, in response to an instruction to start the image capture operation, still-image data, specifically, current still-image data and the previous still-image data. If the current still-image data have varied relative to the previous still-image data, the image capture control unit controls the first camera unit to capture an image of the subject to generate image capture data. In this way, the mobile communication apparatus can prevent any blur from occurring when the camera function is used to capture an image of a subject. | 09-06-2012 |