Mitsubishi Electric Corporation

Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Kohei Fujimoto

Masatoshi Fujii

Tadatomi Ishigami

Takashi Irie

Atsushi Maeda

Ryusuke Kinoshita

Masashi Kido

Hirokazu Chiyonobu

Hiroaki Uchiyama

Masahito Hanao

Masatoshi Miyahara

Atsushi Mori

Norihiro Nishiuma

In a locator, a data synchronization unit calculates an interpolated value for autonomous sensor data which corresponds to a time of latest GNSS data. A complex positioning unit performs complex positioning using the latest GNSS data and the interpolated value for the autonomous sensor data. An autonomous navigation positioning unit performs first autonomous navigation positioning using the interpolated value for the autonomous sensor data, and performs second autonomous navigation positioning using latest autonomous sensor data. A modified amount calculator calculates a modified amount of autonomous navigation positioning, based on a difference between a result of the complex positioning and a result of the first autonomous navigation positioning. An autonomous navigation positioning fix modification unit modifies a result of the second autonomous navigation positioning using the modified amount to calculate a current position.

Locator, accuracy evaluation system therefor, and positioning method

In a locator device, a dead reckoning part calculates a position of a subject vehicle by dead reckoning. A pseudorange smoothing part smooths a pseudorange between a GNSS satellite and a position of the subject vehicle using a carrier wave phase of the GNSS satellite. A GNSS receiver positioning error evaluation part evaluates reliability of the position of the subject vehicle calculated by the multi-GNSS receiver. A GNSS positioning part (Kalman Filter (KF) method) calculates a position of the subject vehicle from a smoothed value of the pseudorange, a positioning augmentation signal, and an orbit of the GNSS satellite. A complex positioning part (KF method) calculates an error in the dead reckoning from the position of the subject vehicle calculated by the GNSS positioning part (KF method), and corrects the position of the subject vehicle calculated by the dead reckoning part based on the error in the dead reckoning.

Positioning device and positioning method

A code positioning part calculates a position of a subject vehicle and a receiver clock based on an orbit of a GNSS satellite in which an error indicated by a positioning reinforcing signal is corrected and a first corrected pseudorange being a pseudorange of the GNSS satellite in which an error indicated by the positioning reinforcing signal is corrected. A receiver clock bias error correction part determines a difference between a two-point range between a position of each of a plurality of GNSS satellites and the position of the subject vehicle and the first corrected pseudorange as an unknown error, and determines a receiver clock bias error of the pseudorange based on the unknown error. A code positioning correction part recalculates the position of the subject vehicle, using a second corrected pseudorange that is obtained by correcting the first corrected pseudorange using the receiver clock bias error.

A positioning apparatus according to the present invention includes: a triaxial acceleration sensor zero point calculating unit which determines whether or not the moving body is performing horizontal plane uniform linear traveling, and calculates a zero point of the triaxial accelerations when a determination is made that the moving body is performing the horizontal plane uniform linear traveling, based on at least triaxial speeds, a longitudinal acceleration, and triaxial accelerations while the moving body is traveling; an apparatus housing attachment angle calculating unit which calculates a pitch direction attachment angle and a roll direction attachment angle based on the zero point of the triaxial accelerations; a triaxial angular velocity coordinate transforming unit which coordinate-transforms the triaxial angular velocities; and a position estimating unit which estimates a current position of the moving body based on at least a yaw rate obtained from the triaxial angular velocities.

Positioning apparatus and positioning method

A primary object of the present invention is to provide a technique of avoiding occurrence of surface defects caused by an electromagnetic brake while checking internal defects with this electromagnetic brake, so that cleanliness of a cast steel can be improved compared with prior arts, and the present invention provides a method for continuously casting steel, the method comprising supplying molten steel into a funnel mold while applying an electromagnetic brake to an outlet flow discharged from an outlet port of an immersion nozzle, wherein magnetic flux density (B) of the electromagnetic brake is within a range of the following (Formula 1): 

Method for continuously casting steel

An object is to provide in a positioning device of a moving body such as a vehicle, a technique which can modify a built-in clock error of a moving body to increase accuracy of a velocity. The positioning device includes a built-in clock error estimating unit which estimates a built-in clock error of the vehicle as a built-in clock error based on a difference between a delta range and a calculated range rate, and a range rate estimating unit which estimates a vehicle stop range rate based on position and velocity of GPS satellite based on transmission signal and a vehicle position, and modifies a calculated range rate, based on the built-in clock error. Further, the positioning device includes an own vehicle velocity calculating unit which calculates own vehicle velocities in three axial directions which form an orthogonal coordinate system, based on a navigation matrix, the vehicle stop range rate and the modified calculated range rate.

Positioning method

A primary object of the present invention is to provide a technique of avoiding occurrence of surface defects caused by an electromagnetic brake while checking internal defects with this electromagnetic brake, so that cleanliness of a cast steel can be improved compared with prior arts, and the present invention provides a method for continuously casting steel, the method comprising supplying molten steel into a mold while applying an electromagnetic brake to an outlet flow discharged from an outlet port of an immersion nozzle, wherein magnetic flux density (B) of the electromagnetic brake is within a range of the following (Formula 1): 

An object of the present invention is to provide a positioning device which can more reliably and frequently correct a own vehicle position earlier, reliably detect an error matching state or a straying state earlier and correct the position to a correct position. The positioning device according to the present invention includes a GPS receiver, a GPS position calculating unit which calculates pseudo distances to the GPS satellites based on the transmission signals, and calculates a re-calculated GPS position which is the own vehicle position based on the pseudo distances, and a multipath influence evaluating unit which evaluates a multipath influence on the GPS position based on a difference between the GPS position calculated by the GPS receiver and the re-calculated GPS position calculated by the GPS position calculating unit.

Positioning device

A vehicle position display controller performs a branch determination processing of determining whether a vehicle has entered a branch road. In addition, in a case where a connecting road through which a currently traveled road is connected to a road extending in parallel with the currently traveled road lies ahead of a position of the vehicle, the vehicle position display controller performs a road shape conversion processing of subjecting the road extending in parallel to the branch determination processing on the assumption that the road extending in parallel is the branch road by making a correction of an angle between the currently traveled road and the connecting road. However, in a case where the vehicle travels at a speed equal to or greater than a predetermined speed, the vehicle position display controller does not perform the road shape conversion processing.

Growing community of inventors

Tokyo, Japan

Kohei Fujimoto