A method for calibrating a photoacoustic system (100) for detecting the concentration of fluids, said method comprising a step of prearranging a photoacoustic system for fluids (100) comprising a support (105) arranged to receive a fluid to be examined, a primary optical source (110), a secondary optical source (120), an electronic system comprising a control unit arranged to drive the primary optical source (110) and the secondary optical source (120) by means of two respective periodic signals s(t) and s(t), an acoustic transducer (130) arranged to acquire an acoustic response signal . The method also comprises the steps of selecting a fluid to be examined having a plurality of absorption peaks in the electromagnetic spectrum, associated with corresponding wavelengths λ, with i = 1,2,..., n; in the plurality of absorption peaks , selecting an absorption peak p* associated with a corresponding wavelength λ*; defining a first wavelength interval between two end wavelengths λ*and λ*, where λ*<λ*<λ*; defining a second wavelength interval between two end wavelengths λ* and λ*, where λ* <λ*<λ*, and where λ*< λ* and λ*> λ*; by the primary optical source (110), transmitting toward the support (105), without fluid, an electromagnetic radiation having a wavelength λ, such that λ* < λ < λ*; by the secondary optical source (120), transmitting toward the support (105), without fluid, an electromagnetic radiation having a wavelength λ, such that λ < λ* or λ > λ*; by the acoustic transducer (130), acquiring an acoustic response signal = +; iterating the steps of variation of the values of I and φ, emission of the electromagnetic radiations having wavelengths λ and λ, acquisition of the acoustic response signal = +; suspending the iteration when the condition = is reached, where is a predetermined value.
- 출원번호 : IB2025/056882
- 출원인 : UNIVERSITÀDEGLI STUDI DI SIENA;
- 특허번호 :
- IPC : G01N-021/27(2006.01);G01N-021/17(2006.01);