En este trabajo se presenta la implementación y caracterización eléctrica de un sensor polimérico piezoléctrico de banda ancha con geometría lineal, basado en una película delgada de fluoruro de polivinilideno. Se midió la impedancia eléctrica del sensor en función de la frecuencia, encontrándose que el polímero prácticamente no fue alterado por el proceso de fabricación del sensor. Además, se estudió la respuesta en frecuencia del sensor con un amplificador de transimpedancia, observándose una marcada reducción del ancho de banda del sistema debida a la elevada capacitancia del dispositivo.
We propose an experimental technique for determining the distance to the Moon. Our technique is based on measuring the change in angular size of the lunar disk due to the variation of the observer-Moon distance, as caused by the rotation of the Earth over several hours. Using this method we obtained a value of 3.46 Â 10 5 km with a precision of 7%. Additionally, our technique allows for the determination of the Moon radius (1678 km 6 7%), and the instantaneous radial velocity with respect to the Earth (26.4 m/s 6 26%). A unique advantage of this method is that it is performed from a single location with a single observer, unlike the traditional parallax-based measurements that require at least two observers with a large separation distance.
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