Magnetic coupling mobile robot
A probe-holder carriage includes a frame which can slide over a highly magnetically permeable support surface and at least one permanent magnet able to interact magnetically with, and couple the robot to, the surface. The permanent magnet is positioned so that one pole grazes the surface and faces the surface at a minimum distance from it. The frame defines a central housing which can support at least one probe.
1. A probe-holder carriage, comprising:
a probe-holder frame,
sliding means connected to said probe-holder frame and suitable for cooperating with a resting surface in a material with high magnetic permeability so as to permit a sliding of the carriage on said surface,
at least one permanent magnet, suitable for interacting magnetically with said resting surface for an anchorage of the carriage to the resting surface, said permanent magnet being fitted so as to graze the resting surface with one of its poles, wherein:
said probe-holder frame defines a central housing and comprises support means suitable to support at least one probe inside said central housing,
said sliding means comprise sliding skates hinged to the probe-holder frame so as to be free to oscillate about an oscillation axis in relation to said frame to adapt to any curvature of the resting surface, wherein
the at least one permanent magnet is supported by a respective sliding skate,
the sliding skates are fitted with wheels suitable to permit a sliding of the carriage in one direction only,
the at least one permanent magnet is kept in place at a predefined distance from the resting surface, and
the rotation axis of the wheels is orthogonal to the oscillation axis of the sliding skates.
2. A carriage according to claim 1 , wherein said sliding means comprise wheels or spheres fitted directly onto the probe-holder frame.
3. A carriage according to claim 1 , wherein the probe-holder frame comprises two substantially vertical end plates connected by two lower lateral bars, two pairs of sliding skates being hinged to said lower lateral bars at said plates.
4. A carriage according to claim 3 , wherein the sliding skates oscillate on planes parallel to the end plates.
5. A carriage according to claim 1 , wherein the sliding skates are fitted with wheels suitable to permit a sliding of the carriage in one direction only.
6. A carriage according to claim 1 , wherein the sliding skates are fitted with spheres suitable to permit a sliding of the carriage in any direction.
7. A carriage according to claim 3 , wherein the end plates are connected by upper lateral bars which support at least one probe-holder bracket.
8. A carriage according to claim 7 , wherein said probe-holder bracket comprises a guide element fixed to said upper lateral bars and a sliding element suitable to support the probe and to translate vertically in relation to said guide element.
9. A carriage according to claim 7 , wherein said sliding element is elastically connected to the guide element by means of a compensation spring, acting so as to press the sliding element towards the resting surface.
10. A carriage according to claim 1 , further comprising at least one probe fitted in the central housing and a compensation spring acting on said probe so as to press the probe into contact with the resting surface.