Abstract: A multi-degree of freedom (DOF) force and torque sensor is provided. The multi-DOF force and torque sensor includes a first rigid plate, a second rigid plate, multiple elastic elements connected between the first and second rigid plates, and multiple signal pairs connected between the first and second rigid plates. The signal pairs are used for detecting relative displacements of the first and second rigid plates in multiple directions.

Abstract: A rangefinder for measuring a distance to a target includes a housing having a front wall, an opposed rear wall, first and second side walls disposed between the front and rear walls, an upper wall, and an opposed lower wall. The rangefinder also includes a transmission device for transmitting a signal towards a target, a receiving device for receiving a reflected signal from the target, and a distance measuring mechanism for determining the distance to the target using the transmitted signal and the reflected signal. A display device is in communication with the distance measuring mechanism for displaying the determined distance to the target. A solar power supply mechanism supplies solar power to operate the rangefinder, and includes a solar energy collector positioned on an outer surface of the housing that is operatively in communication with an energy storage device.