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Vol. 24, Special Issue, August 2013, pp. 7-18




Versatile Signal Acquisition System for Ultrasound Equipment Frequency Domain Parameters Estimation

Signal Processing Department, Kaunas University of Technology, Studentu str. 50-340, Kaunas, LT-51368, Lithuania
Tel.: +370-37-300532
E-mail: linas.svilainis@ktu.lt


Received: 15 May 2013   /Accepted: 16 August 2013   /Published: 30 August 2013

Digital Sensors and Sensor Sysstems


Abstract: Versatile system for ultrasound equipment parameters measurement is presented. The system is based on single direct digital synthesis (DDS) generator which is used for excitation and dual simultaneous sampling analog-to-digit (ADC) conversion channels. System is dedicated for ultrasound equipment frequency domain parameters measurement: transduction AC response, insertion loss AC response, harmonic distortion, noise and electrical impedance can be estimated. Since primary application of the system is the ultrasonic equipment performance evaluation, operating frequencies range corresponds to most common ultrasound frequencies. Frequency range 20 kHz to 30 MHz was targeted. Despite being aimed for parameters comparison and estimation, system is universal: several measurements can be arranged using one excitation and two reception channels. System structure and setups for the aforementioned measurements are presented. Modular PC104 form-factor construction allows operating the system in both local and remote PC connectivity mode. Setup for most common tasks and examples of measurement results obtained are presented.


Keywords: Acquisition system, Gain AC response, Ultrasound transmission measurement, Noise measurement, Sine wave correlation, Impedance measurement, Distortion measurement, Power delivery efficiency.


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