Sensors & Transducers, Vol. 24, Special Issue, August 2013, pp. 35-42 35 S S S e e e n n n s s s o o o r r r s s s & & & T T T r r r a a a n n n s s s d d d u u u c c c e e e r r r s s s © 2013 by IFSA http://www.sensorsportal.com Microprocessor System for Thermoacoustic Plants Efficiency Analysis Based on a Two-Sensor Method 1 Yuriy KONDRATENKO, 2 Volodymyr KOROBKO, 3 Oleksiy KOROBKO 1 Department of Intelligent Information Systems, Petro Mohyla Black Sea State University, 10 68th Desantnykiv st.., Mykolayiv, 54003, Ukraine, Tel.: +380512400939 2 Department of Marine and Stationary Power Plants, 3 Department of Computerized Control Systems, Admiral Makarov National University of Shipbuilding, 9 Geroyiv Stalingrada ave., Mykolayiv, 54025, Ukraine, Tel.: 1 +380506504509, 2 +380504936282 E-mail: y_kondratenko@rambler.ru, volodymyr.korobko@nuos.edu.ua, oleksii.korobko@nuos.edu.ua Received: 15 May 2013 /Accepted: 16 August 2013 /Published: 30 August 2013 Abstract: The article is devoted to the dependency analysis of the thermoacoustic devices performance from acoustic wave parameters (frequency, pressure magnitude etc.). Detailed study of electroacoustic parameters impact on the overall productivity of loudspeaker driven thermoacoustic systems is given. Authors proposed the structure and algorithm basis of the microprocessor system for automated electroacoustic performance calculation. Proposed by Fusco et al. [1] two sensor method is implemented in digital signal processing algorithm for real-time acoustic power calculation. Synthesized microprocessor system is tested during the experimental research of the loudspeaker driven standing wave thermoacoustic refrigerator performance measurements. Analysis of the results obtained shows that the proposed microprocessor system with implemented data processing algorithm can be used for calculations of the thermoacoustic devices overall efficiency. Copyright © 2013 IFSA. Keywords: Microprocessor system, Thermoacoustic device, Two-sensor method, Parametric identification, Electroacoustic performance. 1. Introduction One of the important components of developed industry is the use of heat engines that convert heat energy into mechanical or electrical. Conventionally, heat machines can be divided into two groups: direct effect mechanisms (heat engines) and reverse action mechanisms (heat pumps, refrigerators). The most common are the mechanical heat machines in which the mutual energy conversion is based on the use of special mechanical devices, such as piston mechanisms (internal combustion engines, steam Article number P_SI_429