Wood pulp characterization by a novel photoacoustic sensor

摘要: In this paper we introduce a novel photoacoustic sensing technique that captures signal excited by laser light pulse after the has propagated through turbid medium. Simultaneously, ultrasonic sound wave is captured it same By combining two signals, more information on investigated medium can be obtained. Applications found in pulp and industry where monitoring wood compositions of interest. Depending its origin, suspension contains different fibres fibre fragments (fines). Poor control composition leads to an unstable process compromises production, quality energy efficiency mill. The result shows feasibility sensor mass fractions fines suspension. first received echo, corresponding interaction with sample, showed stronger correlation fraction compared fraction. second much than Hence, proposed these echoes, about could extracted from any other built single principle.