Navigation apparatus and position detection method
First Claim
1. A navigation apparatus comprising:
- a main unit to be attached to a mobile object through a predetermined base section on which the main unit is mounted, the main unit detecting a current position of the mobile object based on positioning information supplied from a predetermined positioning unit;
an acceleration calculation unit for calculating acceleration applied to the mobile object based on the mobile object'"'"'s speed calculated based on the positioning information;
an acceleration sensor for observing acceleration applied to the main unit;
an attachment inclination calculation unit for calculating an attachment inclination of the acceleration sensor with respect to the mobile object, based on the mobile object'"'"'s acceleration and the observed acceleration;
a speed estimate unit for estimating, while the positioning information is not being supplied, a speed and position of the mobile object, based on the observed acceleration and the attachment inclination;
a mounting detection section for detecting whether the main unit is mounted on the base section; and
a speed estimate control unit for forcing the speed estimate unit to stop estimating the speed when the mounting detection section detects that the main unit is not mounted on the base section.
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Accused Products
Abstract
A navigation apparatus includes: a main unit to be attached to a mobile object through a base section, the main unit detecting a current position of the mobile object based on positioning information; a section that calculates acceleration applied to the mobile object based on the mobile object'"'"'s speed; an acceleration sensor that observes acceleration applied to the main unit; a section that calculates an attachment inclination of the acceleration sensor with respect to the mobile object; a section that estimates, while the positioning information is not being supplied, a speed and position of the mobile object; a section that detects whether the main unit is mounted on the base section; and a section that forces the above section to stop estimating the speed when the main unit is not mounted on the base section.
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Citations
13 Claims
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1. A navigation apparatus comprising:
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a main unit to be attached to a mobile object through a predetermined base section on which the main unit is mounted, the main unit detecting a current position of the mobile object based on positioning information supplied from a predetermined positioning unit; an acceleration calculation unit for calculating acceleration applied to the mobile object based on the mobile object'"'"'s speed calculated based on the positioning information; an acceleration sensor for observing acceleration applied to the main unit; an attachment inclination calculation unit for calculating an attachment inclination of the acceleration sensor with respect to the mobile object, based on the mobile object'"'"'s acceleration and the observed acceleration; a speed estimate unit for estimating, while the positioning information is not being supplied, a speed and position of the mobile object, based on the observed acceleration and the attachment inclination; a mounting detection section for detecting whether the main unit is mounted on the base section; and a speed estimate control unit for forcing the speed estimate unit to stop estimating the speed when the mounting detection section detects that the main unit is not mounted on the base section. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A position detection method comprising:
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detecting a current position of a main unit attached to a mobile object through a base section on which the main unit is mounted, based on positioning information supplied from a predetermined positioning unit; calculating acceleration applied to the mobile object based on the mobile object'"'"'s speed calculated based on the positioning information; observing, by using an acceleration sensor, acceleration applied to the main unit; calculating an attachment inclination of the acceleration sensor with respect to the mobile object, based on the mobile object'"'"'s acceleration and the observed acceleration; estimating, while the positioning information is not being supplied, a speed and position of the mobile object, based on the observed acceleration and the attachment inclination; detecting whether the main unit is mounted on the base section; and stopping the estimation of the speed when it is detected that the main unit is not mounted on the base section. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A navigation apparatus comprising:
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a main unit to be attached to a mobile object through a predetermined base section on which the main unit is mounted, the main unit detecting a current position of the mobile object based on positioning information supplied from a predetermined positioning unit; an acceleration calculation section that calculates acceleration applied to the mobile object based on the mobile object'"'"'s speed calculated based on the positioning information; an acceleration sensor that observes acceleration applied to the main unit; an attachment inclination calculation section that calculates an attachment inclination of the acceleration sensor with respect to the mobile object, based on the mobile object'"'"'s acceleration and the observed acceleration; a speed estimate section that estimates, while the positioning information is not being supplied, a speed and position of the mobile object, based on the observed acceleration and the attachment inclination; a mounting detection section that detects whether the main unit is mounted on the base section; and a speed estimate control section that forces the speed estimate section to stop estimating the speed when the mounting detection section detects that the main unit is not mounted on the base section.
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Specification