Comparison of Three Linear Digital Filters Applied to Improve the Quality of the Measured Acoustic Field

The measurement of acoustic fields generated by ultrasonic transducers is important for determining the focal length, lateral resolution, and amplitudes of the lateral and grating lobes. The acoustic field is commonly characterized by a set of scans using a needle hydrophone. The output of the hydrophone can be connected to an analog filter to...

Manufacturing thin ionic polymer metal composite for sensing at the microscale

Ionic polymer metal composites (IPMCs) are a class of materials with a rising appeal in biological micro-electromechanical systems (bio-MEMS) due to their unique properties (low voltage output, bio-compatibility, affinity with ionic medium). While tailoring and improving actuation capabilities of IPMCs is a key motivator in almost all IPMC...

Transducer selection

The transducer selection process as applied to the F29 digital data-acquisition system is discussed in detail. The selection procedure consists of interviews of the users of the system, specification of the transducer part of the data-acquisition system, transducer selection from manufacturer data, evaluation tests, integration into the data...