An arrangement of cancellation electromagnets control magnetic adhesion of a wheel to a surface. The wheel has an inner annular disc composed of a non-magnetic material with apertures which retain electromagnets and permanent magnets, and an outer annular disc composed of a ferromagnetic material which is disposed on a side of the inner annular disc, with a non-magnetic isolator ring having curves extending in a serpentine manner. In one embodiment, the curves isolate the electromagnets from the permanent magnets. In another embodiment, the outer annular disc is rotated relative to the inner annular disc to dispose the curves of the serpentine isolator ring in a second position to allow magnetic interaction between the electromagnets and the permanent magnets to generate a second magnetic flux between the permanent magnets and the ferromagnetic surface which decreases adhesion of the wheel to the ferromagnetic surface. A method implements the system.

An actuation system and method are actuated to control magnetic adhesion of a wheel to a surface. The actuation system is coupled to the wheel having inner and outer annular discs and the wheel is configured to adhere magnetically to a surface. The actuation system has a motor configured to rotate a first disc and to not rotate a second disc. In a first configuration, the motor rotates the first disc relative to the second disc in a first rotational direction, thereby generating a first magnetic flux to increase the adhesion of the wheel to the metallic surface. In a second configuration, the motor rotates the first disc relative to the second disc in a second rotational direction opposite the first rotational direction, thereby generating a second magnetic flux to decrease the adhesion of the wheel to the metallic surface. A method is also disclosed.

A caster wheel assembly for an outdoor power equipment machine includes a wheel mount and provides a double bell-shaped caster wheel including two bell-shaped halves, each bell-shaped half includes a central hub, a smooth transition portion, an outer circumferential rim, and a planar face. A ground contacting tread can be provided by the outer circumferential rims. A ground contacting tread can be provided by a resilient tread ring positioned between the two bell-shaped halves.

Systems, methods, and apparatus for acoustic inspection of a surface are described. An example system may include an inspection robot structured to traverse an inspection surface in a direction of travel. The inspection robot may include a payload having a plurality of arms, connected to the inspection robot, to rotate around respective ones of a plurality of axes while the inspection robot traverses the inspection surface, where each of the plurality of axes is in the direction of travel. A plurality of sleds may be connected to the plurality of arms, and a plurality of inspection sensors connected to the plurality of sleds. The plurality of inspection sensors may be spaced apart from each other at adjustable positions to inspect the inspection surface at an adjustable resolution.

Systems, apparatus and methods for providing an interactive inspection map are disclosed. An example apparatus for providing an interactive inspection map of an inspection surface may include an inspection visualization circuit to provide an inspection map to a user device in response to inspection data provided by a plurality of sensors operationally coupled to an inspection robot traversing the inspection surface, wherein the inspection map corresponds to at least a portion of the inspection surface. The apparatus may further include a user interaction circuit to interpret a user focus value from the user device, and an action request circuit to determine an action in response to the user focus value. The inspection visualization circuit may further update the inspection map in response to the determined action.

A robotic vehicle for traversing surfaces comprises a chassis having a plurality of wheels mounted thereto. Two magnetic drive wheels are spaced apart in a lateral direction and rotate about a rotational axis while a stabilizing wheel is provided in front of or behind the two drive wheels. The drive wheels are configured to be driven independently, thereby driving and steering the vehicle along the surface. The vehicle also includes a sensor probe assembly that is supported by the chassis and configured to take measurements of the surface being traversed. In accordance with a salient aspect, the vehicle includes a probe normalization mechanism that is configured to determine the surface curvature and adjust the orientation of the probe transducer as a function of the curvature of the surface, thereby maintaining the probe at the preferred inspection angle irrespective of changes in the surface curvature with vehicle movement.

The present disclosure generally relates to an omni-direction wheel system and methods for controlling the omni-direction wheel system. The omni-direction wheel system includes a plurality of suspension systems that operate independently of one another. Each suspension system may include an electromagnetic steering hub configured to rotate a wheel 360 degrees about a vertical axis based on a polarity of an electromagnetic signal applied to the electromagnetic steering hub. The suspension system may further include an in-wheel motor configured to rotate with the wheel and drive the wheel about a horizontal axis.

An unmanned aerial vehicle (UAV) includes a body constructed to enable the UAV to fly and three or more legs connected to the body and configured to land and perch the UAV on a curved ferromagnetic surface. Each leg includes a first portion connected to the body, a second portion including a magnet and configured to magnetically attach and maintain the magnetic attachment of the leg to the ferromagnetic surface during the landing and perching, and a passive articulation joint connecting the first and second portions and configured to passively articulate the second portion with respect to the first portion in response to the second portion approaching the ferromagnetic surface. The UAV further includes a releasable crawler including magnetic wheels which detach the crawler from the body during the perching and maneuver the crawler on the ferromagnetic surface while magnetically attaching the crawler to the ferromagnetic surface after detachment.

Inspection robots with flexible wheel/motor positioning are described. An example inspection robot may have a housing having a first connector positioned on a first side of the housing, and a second connector positioned on a second side of the housing. A first drive module may include a wheel and a motor and be operatively coupled to the first connector. A second drive module may include a wheel and a second motor and be operatively coupled to the second connector, where the wheel may be interposed between the second connector and the second motor.

Systems for reprogrammable inspection robots are described. An example system may include an inspection robot having a housing, a payload interface, a drive module interface, and a tether interface. The system may further include a first electronic board having a primary functionality circuit communicatively coupled to a base station and a second electronic board operationally coupled to the payload interface, the second electronic board having a payload functionality circuit coupled to a selected payload through the payload interface. The example system may further include a third electronic board operationally coupled to the drive module interface, the third electronic board having a drive module functionality circuit communicatively coupled to a selected drive module through the drive module interface.