The invention discloses an ultrasonic
particle size analyzer, which comprises a hardware part and a
software part, wherein the hardware part comprises an ultrasonic wave transmitting and receiving device and
ultrasonic detection devices which are independent mutually, as well as an
oscilloscope and a computer; the
software part comprises a plurality of ultrasonic models, five
global optimization algorithms and an
expert consultation mode. An ultrasonic pulse
signal is generated by the ultrasonic transmitting and receiving device, the ultrasonic
waves are transmitted to suspension liquid through different
ultrasonic detection devices, the amplitudes of the ultrasonic
waves are attenuated after the ultrasonic
waves are interacted with particles in the suspension liquid, and at different frequencies, the attenuation of the amplitudes is different according to the sizes and volume fractions of particles;
particle size distribution and volume fractions of required particles can be obtained after the collected attenuation
signal is processed through the computer. The ultrasonic
particle size analyzer provided by the invention can perform
nondestructive measurement, is rapid, reliable, and particularly suitable for high-concentration non-transparent samples, and samples are not required to be diluted.