| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 701217000 | Using dead-reckoning apparatus | 8 |
| 20080234936 | Method for resolving ground level errors in simulations - A method for reconciling ground-level discrepancies between the displayed path of a moving body and a terrain model in a graphical simulation, including the steps of (1) examining the individual data points describing a recorded trip by a vehicle, (2) determining which of the data points correspond to points when the vehicle was actually on the ground, (3) determining the altitude difference between the recorded altitude data and the terrain model at each of the determined “on-ground” points, and (4) using the altitude difference to create a correction signal which can be applied either to the recorded altitude data or the terrain model. | 09-25-2008 |
| 20080306689 | MOBILE POSITIONING SYSTEM - There is provided a mobile positioning apparatus for performing map matching based on a pixel image. The mobile positioning apparatus comprises a position storage device which holds a position information group indicating a current position of a mobile body and likelihood information thereof as a nonparametric distribution; a movement vector estimation device which outputs a movement vector indicating a moving distance and a moving direction of the mobile body at a discrete time T and likelihood information thereof; an image database which holds a peripheral map of a range of movement of the mobile body as an image group of a resolution according to a moving resolution of the mobile body; and a pixel crossing determination device which performs map matching using the position information group and the movement vector based on the peripheral map. | 12-11-2008 |
| 20090088977 | CURRENT POSITION INFORMATION REPORTING SYSTEM, INFORMATION CENTER APPARATUS, AND METHOD THEREOF - An information center apparatus has a communication section, a motion information calculating section, a communication delay time calculating section, a communication cycle waiting time calculating section, an error estimating section and a correcting section. The communication section acquires reported current position information of a first moving body apparatus and reports a corrected current position information to a second moving body apparatus. The error estimating section estimate an error in the reported current position information with respect to an actual current position of the first moving body apparatus based on motion information calculated by the motion information calculating section, communication delay times calculated by the communication delay time calculating section, and a communication cycle waiting time calculated by the communication cycle waiting time calculating section. The correcting section corrects the reported current position information using the error estimated by the error estimating section to obtain the corrected current position information. | 04-02-2009 |
| 20100004860 | PEDESTRIAN NAVIGATION SYSTEM AND METHOD - An on-foot pedestrian navigation module useful for pedestrian navigation when operated with at least a control unit and another on-foot pedestrian navigation module, comprising (a) at least a first sensor unit and a second sensor unit, wherein each sensor unit including an up/down sensor adapted for sensing an ‘up’ condition and a ‘down’ condition associated with relative displacement of the module with respect to a surface, and a signal transmitter/receiver adapted, in response to an activation signal coming from a module controller, for generating a propagating signal (b) a module controller for controlling the operation of the module in response to a control signal coming from the control unit and (c) a communication unit for enabling said module to communicate with said at least the control unit and other module, thereby facilitating collecting motion data at the control unit and integrating the motion data with motion data coming from the other module, the motion data being indicative of a condition of each up/down sensor and receipt of the propagating signal by at least two sensor units of said other module, and wherein the motion data is useful for determining a momentary position of the pedestrian's foot during motion. | 01-07-2010 |
| 20100030471 | POSITION DETECTING APPARATUS AND METHOD USED IN NAVIGATION SYSTEM - A position detecting apparatus and method used in a navigation system, which can improve positional accuracy and bearing accuracy even in a system equipped with few sensors, are provided. A position detecting apparatus used in a navigation system for detecting a vehicle position includes: a sensor unit including a vehicle speed sensor, an acceleration sensor, and an angular velocity sensor; and a dead reckoning calculating unit for calculating state quantity inclusive of a current vehicle position, a vehicle speed, and a vehicle attitude angle based on a signal output from each of the sensors at a predetermined periodic interval. The dead reckoning calculating unit includes: a movement calculating unit for calculating a movement during a period from a previous state quantity calculation time up to a current state quantity calculation time; a change amount detecting unit for calculating an amount of change in vehicle attitude; a movement resolving unit for resolving the movement into a vehicle longitudinal component, a vehicle lateral component, and a vehicle vertical component based on the amount of change in vehicle attitude; and a state quantity calculating unit for determining, by calculation, a vehicle position at the current state quantity calculation time using each of the components. | 02-04-2010 |
| 20100125414 | APPARATUS AND METHOD FOR CALCULATING ABSOLUTE MOVEMENT PATH AND RECORDING MEDIUM - An absolute-movement-path calculating apparatus includes a direction acquiring part detecting a movement direction of the terminal at a given timing; a movement-distance calculating part calculating a movement distance of the terminal at the given timing; a relative-movement-path calculating part calculating a relative movement path based on the number of steps and a user's step length and storing the relative movement path; an absolute-position acquiring part acquiring an absolute position of the terminal, and storing the absolute position; and an absolute-movement-path calculating part calculating, each time the absolute positions are stored, a correction value from the relationship between at least two absolute positions and the relative positions corresponding to the absolute positions and calculating an absolute movement path of the terminal indicated by the absolute coordinate from the correction value and the relative movement path. | 05-20-2010 |
| 20110060522 | Apparatus and method for providing location information service in portable terminal - An apparatus and method provides a location information service in a portable terminal when the predicted location is reliable. The apparatus includes a validity determiner for, by a moving pattern of a user, determining the validity of location information previously predicted using Pedestrian Dead Reckoning (PDR) information. | 03-10-2011 |
| 20110082644 | MOVING BODY DISPLAY DEVICE - This disclosure provides a moving body display device, which includes a position calculating module for acquiring a positioning signal of a target moving body and calculating a position of the moving body, a behavior calculating module for calculating a positional change of the moving body based on the positioning signal, and a position storage module for storing a position where the positional change is detected when the positional change that satisfies a determination condition set is detected. | 04-07-2011 |
