CONSOLE FOR CONTROLLING A ROBOTIC MANIPULATOR
A console for controlling a robotic manipulator having an end effector, the console comprising: a hand controller connected to a gimbal assembly; and an articulated linkage connected at its proximal end to a rigid support structure, and at its distal end to the gimbal assembly. The gimbal assembly comprises only three degrees of freedom provided by only three joints, a first joint of the three joints permitting the gimbal assembly to rotate relative to the distal end of the articulated linkage about a first axis. The articulated linkage and gimbal assembly are arranged such that in every configuration of the articulated linkage and gimbal assembly, the first axis has the same orientation relative to the support structure. The articulated linkage has a parallelogram profile thereby mechanically constraining the first axis to have the same orientation relative to the support structure in every configuration of the articulated linkage.
1 . A console configured to control a robotic manipulator having an end effector, the console comprising:
a hand controller connected to a gimbal assembly; and
an articulated linkage connected at its proximal end to a rigid support structure, and at its distal end to the gimbal assembly;
wherein the gimbal assembly comprises only three degrees of freedom provided by only three joints, a first joint of the three joints permitting the gimbal assembly to rotate relative to the distal end of the articulated linkage about a first axis; and
wherein the articulated linkage and gimbal assembly are arranged such that in every configuration of the articulated linkage and gimbal assembly, the first axis has the same orientation relative to the support structure, wherein the articulated linkage has a parallelogram profile thereby mechanically constraining the first axis to have the same orientation relative to the support structure in every configuration of the articulated linkage.
2 . A console as claimed in claim 1 , configured such that when the console is located on a horizontal surface, the first axis is vertical in every configuration of the articulated linkage and gimbal assembly.
3 . A console as claimed in claim 1 , configured to wholly accommodate rotation of the hand controller by articulation of the three joints of the gimbal assembly.
4 . A console as claimed in claim 1 , configured to accommodate translation of the hand controller by articulation of the articulated linkage.
5 . A console as claimed in claim 1 , wherein the gimbal assembly comprises:
a first link and a second link;
a second joint permitting the first link to rotate relative to the second link about a second axis, the second axis being perpendicular to the first axis; and
a third joint permitting the hand controller to rotate relative to the second link about a third axis, the third axis being perpendicular to the second axis.
6 . A console as claimed in claim 5 , wherein from a central position of the gimbal assembly in which the first axis, second axis and third axis are all perpendicular to each other, the range of motion of the first joint is limited such that it is capable of rotating more than 90° in either rotational direction about the first axis.
7 . A console as claimed in claim 6 , wherein from the central position of the gimbal assembly, the first joint is limited to a maximum rotation angle of between 90° and 115° in a rotational direction which causes the first link to move towards the distal end of the articulated linkage.
8 . A console as claimed in claim 6 , wherein from the central position of the gimbal assembly, the first joint is limited to a maximum rotation angle of between 90° and 100° in a rotational direction which causes the first link to move away from the distal end of the articulated linkage.
9 . A console as claimed in claim 5 , wherein from a central position of the gimbal assembly in which the first axis, second axis and third axis are all perpendicular to each other, the range of motion of the second joint is limited such that it is capable of rotating less than 90° in either rotational direction about the second axis.
10 . A console as claimed in claim 9 , wherein from the central position of the gimbal assembly, the second joint is limited to a maximum rotation angle of between 80° and 90° in a rotational direction which causes the second link to move towards the first link.
11 . A console as claimed in claim 8 , wherein from the central position of the gimbal assembly, the second joint is limited to a maximum rotation angle of between 80° and 90° in a rotational direction which causes the second link to move away from the first link.
12 . A console as claimed in claim 5 , wherein from a central position of the gimbal assembly in which the first axis, second axis and third axis are all perpendicular to each other, the range of motion of the third joint is limited such that it is capable of rotating less than or the same as 90° in either rotational direction about the third axis.
13 . A console as claimed in claim 12 , wherein from the central position of the gimbal assembly, the third joint is limited to a maximum rotation angle of 90° in either rotational direction about the third axis.
14 . A console as claimed in claim 1 , further comprising a position sensor located at the first joint configured to measure a yaw motion of the hand controller solely by sensing a rotation of the first joint about the first axis.
15 . A console as claimed in claim 5 , further comprising a position sensor located at the second joint configured to measure a pitch motion of the hand controller solely by sensing a rotation of the second joint about the second axis.
16 . A console as claimed in claim 5 , further comprising a position sensor located at the third joint configured to measure a roll motion of the hand controller solely by sensing a rotation of the third joint about the third axis.
17 . A console as claimed in claim 1 , the console being a surgeon's console configured to control a surgical robot carrying a surgical instrument.
18 . A console as claimed in claim 1 , configured to control a further robotic manipulator having a further end effector, the console further comprising:
a further hand controller connected to a further gimbal assembly; and
a further articulated linkage connected at its proximal end to the rigid support structure, and at its distal end to the further gimbal assembly;
wherein the further gimbal assembly comprises only three degrees of freedom provided by only three joints, a first joint of the three joints permitting the further gimbal assembly to rotate relative to the distal end of the further articulated linkage about a fourth axis; and
wherein the further articulated linkage and the further gimbal assembly are arranged such that in every configuration of the further articulated linkage and the further gimbal assembly, the fourth axis has the same orientation relative to the support structure.
19 . A console as claimed in claim 18 , wherein the hand controller is configured for operation by one hand of a user, and the further hand controller is configured for operation by the other hand of the user.