CAPACITIVE TRANSDUCER DRIVE DEVICE AND OBJECT INFORMATION ACQUIRING DEVICE

摘要

Provided is a capacitive transducer drive device capable of adjusting a potential difference applied between electrodes of a cell with a simple configuration. A capacitive transducer to be driven by the drive device includes a cell including: a first electrode included in a vibrating membrane; and a second electrode formed to oppose the first electrode through intermediation of a gap. One of the first electrode and the second electrode of the cell is electrically connected to a first DC voltage applying unit, and the other of the first electrode and the second electrode of the cell is electrically connected to a second DC voltage applying unit. A voltage to be applied by the second DC voltage applying unit is set to be lower than a voltage to be applied by the first DC voltage applying unit. The voltage to be applied by the second DC voltage applying unit is variable.

主权项

1. A drive device for a capacitive transducer,
the capacitive transducer comprising a cell,
the cell comprising a vibrating membrane, a first electrode included in the vibrating membrane, and a second electrode formed to oppose the first electrode through intermediation of a gap, the drive device comprising: a first DC voltage applying unit electrically connected to one of the first electrode and the second electrode included in the cell; and a second DC voltage applying unit electrically connected to another of the first electrode and the second electrode included in the cell, wherein the second DC voltage applying unit is configured to apply, to the another of the first electrode and the second electrode, a voltage lower than a voltage applied to the one of the first electrode and the second electrode by the first DC voltage applying unit, and wherein the voltage applied by the second DC voltage applying unit is variable.