US Patent 10893662 Animal sensory stimulation with fur impedance detection

A collar-mounted location sensor and stimulation unit includes a body. A generally planar stimulation unit and impedance-based fur detector in combination protect the animal from harmful stimulation. At least one sensory stimulator is configured to provide at least one of auditory, kinesthetic, and visual stimulation responsive to an output of a location sensor. One or more of a voltage, current, oscillation frequency, extent of modulation, or other output characteristic of the stimulation unit output is varied responsive to the detected fur impedance to protect and benefit both the body and mind of the animal.