期刊论文

Hu, Hongwei

英文

Powder Technology

0032-5910

2017

313

9-17

10.1016/j.powtec.2017.03.004

The time and frequency domain waveforms of the reference signal and detection signals with different conglutinated layers (including A9, A10 and A11) are shown in Fig. 7. It can be observed that, compared with the reference signal, the amplitudes of the detection signals have significant attenuation. According to the theory of wave propagation in a solid, because of the two different acoustic impedances of the conglutinated layer and the pipeline, the multiple reflection and refraction between

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In the production of polypropylene, powder conglutination in pipelines easily leads to blockage, which can seriously affect the operation safety of the pipeline, so it is very important to detect and quantitatively evaluate the powder conglutination. This paper proposed an acoustic-ultrasonic (AU) quantitative evaluation method for powder conglutination detection in polypropylene production pipelines. A simulation model was developed to investigate the wave propagation characteristics of conglutinated layers with different areas and thicknesses using stress wave factors (SWF). Experiments were...