Abstract: Systems and methods for analyzing the resonant frequency of vibratory wires within vibratory wire gauges. The resonant frequency of the vibrating wire is determined by using an interface that digitizes the response of an excited wire in the gauge. A transform then converts the digitized data into a frequency spectrum. The resulting spectrum is used to estimate the resonant frequency of the vibrating wire. The resulting measurement or estimate of the resonant frequency can be used to measure or determine some physical characteristic of the device or structure or system connected to the gauge.

Abstract: A device for practicing putting a golf ball, with an audible feedback signal that indicates that a golf ball has successfully hit the device. The device has a flat circular base with a printed circuit board attached, and a sensor or array of sensors contacting the entire outer rim of the base. An elastomeric membrane covers the device and the circular sensor, and transmits shock to the sensor when a golf ball impacts the device. The sensor or array of sensors produces a trigger signal upon impact of the ball, but is not activated by shaking, tipping, or pressure which might be associated with travel or handling. The audible feedback sound is stored in digital format.