Method for estimating the movement of an object moving in a magnetic field
AssigneeSysnav
InventorsDavid Vissiere, Mathieu Hillion
Life of this patent
Estimating the term…
Abstract
A method for estimating the movement of an object moving in an ambient magnetic field. The method includes acquiring by a magnetic measuring device integral with the object at least one component of the magnetic field and/or at least one i-th derivative of the magnetic field, with n+1≥i≥1, n≥1, at the level of the magnetic measuring device. The method then estimates at least one component of the movement of the object using at least one component of the equation ∇{dot over (n)}B=fn(Ω)·∇nB+gn(∇n+1B)·V, where ∇nB is an n-th derivative of the magnetic field, Ω is the instantaneous angular velocity, V is the instantaneous linear velocity, and fn and gn are predetermined functions.
Claims20
A method comprising the steps of:
- (a) acquiring, by a magnetic measurement unit integral with an object moving in an ambient magnetic field, at least one component:
- of the magnetic field and/or
- of at least one i-th derivative of the magnetic field, with i≥1, at the magnetic measurement unit;
- (b) estimating, by a data processing unit, a movement of said object, wherein at least one component of said movement is estimated using at least one component of the equation ∇{dot over (n)}B=fn(Ω)·∇nB+gn(∇n+1B)·V, with n+1≥i and n≥1, and n≥1, where ∇nB is an n-th derivative of the magnetic field, Ω the instantaneous angular velocity, V the instantaneous linear velocity, and fn and gn predetermined functions;
- (c) adjusting, by a driving unit of the object, at least one of a speed or a direction of movement of the object in response to the estimated movement.
A method comprising the steps of:
- (a) acquiring, by a magnetic measurement unit integral with an object moving in an ambient magnetic field, at least one component:
- of the magnetic field and/or
- of at least one i-th derivative of the magnetic field, with i≥1, at the magnetic measurement unit;
- (b) estimating, by a data processing unit, a movement of said object, wherein at least one component of said movement is estimated using at least one component of the equation ∇{dot over (n)}B=fn(Ω)·∇nB+gn(∇n+1B)·V, with n+1≥i and n≥1 where ∇nB is an n-th derivative of the magnetic field, Ω the instantaneous angular velocity, V the instantaneous linear velocity, and fn and gn predetermined functions;
- (c) capturing an image of a scene with a camera of the object,
- (d) displaying the image together with overlapping visual information, and
- (e) adjusting a position of the overlapping visual information in the displayed image in response to the estimated movement.
A method comprising the steps of:
- (a) acquiring, by a magnetic measurement unit integral with an object moving in an ambient magnetic field, at least one component:
- of the magnetic field and/or
- of at least one i-th derivative of the magnetic field, with i≥1, at the magnetic measurement unit;
- (b) estimating, by a data processing unit, a movement of said object, wherein at least one component of said movement is estimated using at least one component of the equation ∇{dot over (n)}B=fn(Ω)·∇nB+gn(∇n+1B)·V, with n+1≥i and n≥1, where ∇nB is an n-th derivative of the magnetic field, Ω the instantaneous angular velocity, V the instantaneous linear velocity, and fn and gn predetermined functions;
- (c) displaying a virtual scene on a display of the object, and
- (d) adjusting a position of an array of rendered pixels relative to the virtual scene in response to the estimated movement.
A method comprising the steps of:
- (a) acquiring, by a magnetic measurement unit integral with an object moving in an ambient magnetic field, at least one component:
- of the magnetic field and/or
- of at least one i-th derivative of the magnetic field, with i≥1, at the magnetic measurement unit;
- (b) estimating, by a data processing unit, a movement of said object, wherein at least one component of said movement is estimated using at least one component of the equation ∇{dot over (n)}B=fn(Ω)·∇nB+gn(∇n+1B)·V, with n+1≥i and n≥1, where ∇nB is an n-th derivative of the magnetic field, Ω the instantaneous angular velocity, V the instantaneous linear velocity, and fn and gn predetermined functions;
- (c) displaying visual information on a transparent display surface of the object, and
- (d) adjusting a position of the visual information on the transparent display surface in response to the estimated movement.
Dependencies are inferred from the claim text.