The application discloses a
fouling detection device and method based on photoacoustic imaging, wherein the detection device comprises: a sealed cover with at least one transparent surface; a photoacoustic excitation module comprising a
laser, an
optical fiber bundle and a plurality of micro-
fiber collimators; the micro-
fiber collimators are integrated in the transparent surface and used for irradiating
laser outside the transparent surface to generate a photoacoustic
signal; a photoacoustic collection module arranged along the propagation direction of the photoacoustic
signal and used for collecting the photoacoustic
signal; and a
data processing module in communication connection with the photoacoustic collection module and used for calculating the
fouling degree outside the transparent surface according to the collected photoacoustic signal. The application adopts
nanosecond-level light pulses to improve the detection accuracy; and the
laser sequentially traverses the
optical fiber, so that the position of
fouling can be accurately located, and a reliable basis is provided for fouling removal.