Abstract: A light detection and ranging (LIDAR) device scans through a scanning zone while emitting light pulses and receives reflected signals corresponding to the light pulses. The LIDAR device scans the emitted light pulses through the scanning zone by reflecting the light pulses from an array of oscillating mirrors. The mirrors are operated by a set of electromagnets arranged to apply torque on the mirrors, and an orientation feedback system senses the orientations of the mirrors. Driving parameters for each mirror are determined based on information from the orientation feedback system. The driving parameters can be used to drive the mirrors in phase at an operating frequency despite variations in moments of inertia and resonant frequencies among the mirrors.

Abstract: A device for lifting and attaching a wide-base truck tire and wheel to the frame of a road tractor. The device includes a support structure attached to the frame of the vehicle, a channel-shaped support beam attached to a frame of a tractor, a hoist comprising a lifting mechanism, and a structure for holding a wide-base truck tire in conjunction with the channel-shaped support beam.