Abstract:
PROBLEM TO BE SOLVED: To properly notify a driver of a route superior in fuel economy.SOLUTION: An ECU200 includes: a travel information recording part 204 that records travel information including fuel economy FE on a travel information storage part 210 every time a vehicle travels a section (link) Ln set in advance on a map; a route evaluation part 207 that determines fuel economy FE for each of routes RT from a start point P0 to a designated point P1, on the basis of the travel information recorded in the travel information storage part 210 when the vehicle travels in the past, and selects a route superior in fuel economy FE from the routes RT; and a route display part 208 that displays the route RT selected by the route evaluation part 207 on an LCD 72.
Abstract:
PROBLEM TO BE SOLVED: To measure the position of a mobile body more reliably and accurately. SOLUTION: The mobile body positioning apparatus includes: a reception means for receiving signals from a plurality of satellites; an observed pseudo range calculating means for calculating an observed pseudo range based on the signals received by the reception means; and a positioning computation means for performing repeated positioning computation based on the observed pseudo range calculated by the observed pseudo range calculating means. The mobile object positioning apparatus further includes an estimated pseudo range calculating means for calculating an estimated pseudo range by adding a variation of ADR (Accumulated Doppler Range) to a distance determined from a last positioning result and the position of the satellite while the positioning computation means is performing repeated positioning computation. Under a predetermined condition, the positioning computation means performs positioning computation by using an estimated pseudo range calculated by the estimated pseudo range calculating means as a substitute for an observed pseudo range calculated by the observed pseudo range calculating means. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To detect existence of an influence of multipath; to reduce the influence when the influence of multipath exists; and to improve measurement accuracy. SOLUTION: This GNSS (Global Navigation Satellite System) receiving device for calculating a position based on each positioning signal transmitted from a plurality of GNSS satellites is equipped with a multipath determination means for determining whether the positioning signal is received after being influenced by the multipath or not, based on a time characteristic of a pseudo distance determined based on the positioning signal; a phase difference zero point calculation means for determining a zero point where a phase of a direct wave becomes equal to a phase of a reflected wave based on the time characteristic of the pseudo distance, when determined that the positioning signal is received after being influenced by the multipath; a pseudo distance correction means for correcting the pseudo distance based on the time characteristic of an integrated value of a Doppler frequency determined based on the positioning signal and on the zero point determined by the phase difference zero point calculation means; and a positioning operation means for determining a position based on the corrected pseudo distance. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To evaluate the validity of an integer solution of integer bias with high precision. SOLUTION: The carrier phase type mobile positioning system includes: a real root deriving means for deriving a real root of the integer bias; an integer solution deriving means for deriving an integer solution of the integer bias on the basis of the real root derived by the real root deriving means; and a test means for calculating a predetermined indicator which indicates the validity of the integer solution of the integer bias on the basis of the relationship between the real root of the integer bias derived by the real root deriving means and the integer solution of the integer bias derived by the integer solution deriving means and for evaluating the validity of the integer solution of the integer bias on the basis of the relationship between the calculated indicator and a threshold. The test means evaluates the validity of the integer solution of the integer bias by using the threshold of two or more types and/or changing the threshold. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To implement a weighted positioning operation for properly reflecting different errors to respective satellites. SOLUTION: A mobile positioning apparatus includes: a pseudo distance measuring means for measuring a pseudo distance between a mobile and each satellite by use of an observed value of a phase obtained while the mobile stops; an error index calculating means for calculating an index for indicating the error in the measured pseudo distance based on the pseudo distances measured by the pseudo distance measuring means at a plurality of time points while the mobile stops; a weight coefficient determining means for determining a weight coefficient of each satellite based on the error index of each satellite calculated by the error index calculating means; and a positioning operation means for positioning the moving mobile by use of the observed value of the phase obtained from the moving mobile and the weighted positioning operation using the weight coefficient of each satellite determined by the weight coefficient determining means. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To precisely estimate ionosphere delay errors to correct them by properly utilizing various information about the ionosphere conditions. SOLUTION: The mobile location positioning device includes: a first ionosphere condition information reception means 70 for receiving the information about predicted ionosphere conditions to a future time point from the current time point; a second ionosphere condition information reception means 20 for receiving the information about the current ionosphere conditions; an ionosphere delay error estimation means 50 for estimating the ionosphere delay errors; and a positioning means 40 positioning the mobile location on the basis of a reception result of a radio wave from a satellite and the estimated ionosphere delay errors. The ionosphere delay error estimation means estimates the ionosphere delay errors by correcting the first ionosphere delay errors derived based on the first ionosphere condition information on the basis of the second ionosphere delay errors derived based on the second ionosphere condition information. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To filter a pseudo-distance by estimating a pseudo-distance variation by another means without using a measurement result of a carrier wave phase of a satellite signal in a stopped state of a mobile body. SOLUTION: Mobile body position positioning devices 1, 2, 3 are equipped with pseudo-distance calculation means 20A, 20B for calculating the pseudo-distance ρ' between a satellite 10 and a vehicle 90, a stop determination means 70 for determining whether the mobile body is stopped or not, a satellite position calculation means 60 for calculating the satellite position, pseudo-distance variation estimation means 50A, 50B, 50C for estimating the pseudo-distance variation ▵ρ, and a positioning means 40 for positioning the position of the mobile body based on the pseudo-distance and the pseudo-distance variation. When determined stop of the mobile body by the stop determination means, the pseudo-distance variation estimation means estimates the pseudo-distance variation by using a change history of the satellite position calculated by the satellite position calculation means. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a mobile body-mounted positioning device reduced in size and simplified by performing positioning computation only data from a GNSS satellite even when the number of satellite from which positioning data can be received is insufficient in the mobile body-mounted positioning device. SOLUTION: When there is deficiency in the number of satellites from which the positioning data can be received, a current velocity vector of a vehicle 1 is estimated from the positioning data in the past, it is assumed that the vehicle 1 travels on a straight line 30 obtained by extending the velocity vector, and the positioning position of the vehicle 1 is specified using a distance ρ 1 between the GNSS satellite 20 and the vehicle 1 obtained from GNSS data. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a positioning apparatus for moving bodies capable of outputting accurate velocity vectors of moving bodies. SOLUTION: The positioning apparatus for moving bodies includes: a position computation means for computing the position of a moving body through the use of satellite radio waves; a velocity computation means for computing the velocity vector of the moving body on the basis of the satellite radio waves or inertial navigation; a storage means for storing map data in which roads are depicted as a plurality of links; a projection means for outputting a projection velocity vector acquired by projecting the velocity vector computed by the velocity vector computation means to a link in which the moving body is estimated to be present among the links; and an appropriateness determination means for projection to determine whether the adoption of the projection velocity vector outputted by the projection means is appropriate or not. In the case that the appropriateness determination means for projection has determined that the projection velocity vector should be adopted, the positioning apparatus for moving bodies outputs the projection velocity vector as the velocity vector of the moving body. COPYRIGHT: (C)2011,JPO&INPIT