Table control method and table system
AssigneeGE Medical Systems Global Technology Company, LLC
InventorMuthuvelan Varadharajulu
Life of this patent
Estimating the term…
Abstract
For the purpose of providing a method of keeping an iso-center at a fixed position regardless of the tilt of a table top, and a table system having such a function, an apparatus comprises a table top member; lifting means for moving the table top member up and down; forwarding/backing means for longitudinally moving the table top member forward and backward; tilting means for tilting the table top member from a horizontal state; and control means, and the table top member is tilted around an iso-center lying at a spatial position different from a mechanical center of tilt motion of the table top member by the control means controlling vertical displacement of the mechanical center and longitudinal displacement of the table top member according to a tilt angle.
Claims8
A table control method for tilting a table top from a horizontal state, comprising:
- tilting the table top around one point including an isocenter lying at a spatial position different from a mechanical center of tilt motion of the table top by controlling vertical displacement of the mechanical center and longitudinal displacement of the table top according to a tilt angle and by controlling a tilting mechanism tilting the table top;
- and
- the tilting mechanism separate from a lifting mechanism controlling the vertical displacement and from a mechanism controlling the longitudinal displacement.
A table control method for tilting a table top from a horizontal state, comprising:
- tilting the table top around one point including an isocenter lying at a spatial position different from a mechanical center of tilt motion of the table top by controlling vertical displacement of the mechanical center and longitudinal displacement of the table top according to a tilt angle and by controlling a tilting mechanism tilting the table top, wherein when horizontal and vertical distances between said mechanical center and said one point in the horizontal state of the table top are represented by Ch and Cv, respectively, and a target value of the tilt angle is represented by φ1, the amount of the vertical displacement of the mechanical center is defined as:
- Y1
- =
-
- {
- (
- -
- 1
- *
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- *
- (
- Sin
-
-
- ϕ
-
-
- 1
- /
- Sin
-
-
- (
- (
- 180
- -
- Abs
-
-
- (
- ϕ
-
-
- 1
- )
- )
- /
- 2
- )
- )
- *
-
- Sin
-
-
- (
- 90
- +
- Abs
-
-
- (
- ϕ
-
-
- 1
- /
- 2
- )
- -
- Sin
- -
- 1
-
- (
- C
-
-
- v
- /
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- )
- )
- }
- +
-
- {
- (
- -
- 1
- *
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- *
- (
- Sin
-
-
- ϕ
-
-
- 1
- /
- Sin
-
-
- (
- (
- 180
- -
- Abs
-
-
- (
- ϕ
-
-
- 1
- )
- )
- /
- 2
- )
- )
- *
-
- Sqrt
-
-
- (
- 1
- -
- (
- Sin
-
-
- (
- 90
- +
- Abs
-
-
- (
- ϕ
-
-
- 1
- /
- 2
- )
- -
-
- Sin
- -
- 1
-
-
- (
- Cv
- /
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- )
- )
- 2
- )
- *
- Tan
-
-
- ϕ
-
-
- 1
- }
- ,
- and the amount of the longitudinal displacement of the table top is defined as:
- Y3=(−1*Sqrt(Ch2Cv2))*(Sin φ1/Sin((180−Abs(φ1)) /2))*Sqrt(1−(Sin(90+Abs(φ1/2)−Sin−1(Cv/Sqrt(Ch2+Cv2))))2)/Cos φ1.
A table system, comprising:
- a table top member;
- a lifting device for moving the table top member up and down;
- a forwarding/backing device for longitudinally moving the table top member forward and backward;
- a tilting device for tilting the table top member from a horizontal state;
- and
- a control device for tilting the table top member around one point including an isocenter lying at a spatial position different from a mechanical center of tilt motion of the table top member by controlling vertical displacement of the mechanical center and longitudinal displacement of the table top member according to a tilt angle and by controlling said tilting device, and the tilting device separate from a lifting mechanism controlling the vertical displacement and from a mechanism controlling the longitudinal displacement.
A table system comprising:
- a table top member;
- a lifting device for moving the table top member up and down;
- a forwarding/backing device for longitudinally moving the table top member forward and backward;
- a tilting device for tilting the table top member from a horizontal state;
- and
- a control device for tilting the table top member around one point including an isocenter lying at a spatial position different from a mechanical center of tilt motion of the table top member by controlling vertical displacement of the mechanical center and longitudinal displacement of the table top member according to a tilt angle and by controlling said tilting device, wherein when horizontal and vertical distances between said mechanical center and said one point in the horizontal state of the table top member are represented by Ch and Cv, respectively, and a target value of the tilt angle is represented by φ1, the control device defines the amount of the vertical displacement of the mechanical center as:
- Y1
- =
-
- {
- (
- -
- 1
- *
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- *
- (
- Sin
-
-
- ϕ
-
-
- 1
- /
- Sin
-
-
- (
- (
- 180
- -
- Abs
-
-
- (
- ϕ
-
-
- 1
- )
- )
- /
- 2
- )
- )
- *
-
- Sin
-
-
- (
- 90
- +
- Abs
-
-
- (
- ϕ
-
-
- 1
- /
- 2
- )
- -
- Sin
- -
- 1
-
- (
- C
-
-
- v
- /
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- )
- )
- }
- +
-
- {
- (
- -
- 1
- *
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- *
- (
- Sin
-
-
- ϕ
-
-
- 1
- /
- Sin
-
-
- (
- (
- 180
- -
- Abs
-
-
- (
- ϕ
-
-
- 1
- )
- )
- /
- 2
- )
- )
- *
-
- Sqrt
-
-
- (
- 1
- -
- (
- Sin
-
-
- (
- 90
- +
- Abs
-
-
- (
- ϕ
-
-
- 1
- /
- 2
- )
- -
-
- Sin
- -
- 1
-
-
- (
- Cv
- /
- Sqrt
-
-
- (
- Ch
- 2
- +
- Cv
- 2
- )
- )
- )
- )
- 2
- )
- *
- Tan
-
-
- ϕ
-
-
- 1
- }
- ,
- and the amount of the longitudinal displacement of the table top member as:
- Y3=(−1*Sqrt(Ch2+Cv2))*(Sinφ1/Sin((180−Abs(φ1))/2))
Dependencies are inferred from the claim text.