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On-line Size Measurement of Pneumatically Conveyed Particles Through Acoustic Emission Sensing

Zhang, Quoqiang, Yan, Yong, Hu, Yonghui, Zheng, Ge (2019) On-line Size Measurement of Pneumatically Conveyed Particles Through Acoustic Emission Sensing. Powder Technology, 353 . pp. 195-201. ISSN 0032-5910. E-ISSN 0032-5910. (doi:10.1016/j.powtec.2019.05.023) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

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Abstract

Acoustic emission (AE) methods have been proposed for on-line size measurement of pneumatically conveyed particles in recent years. However, there is limited research on the fundamental mechanism of the AE-based particle sizing technique. In order to achieve more accurate measurement of particle size, the impact between particles and a waveguide should be described in a more realistic way. In this paper, an improved model based on the Stronge impact theory is presented to establish the relationship between the resulting AE signal and the particle size being measured. The improved model is validated with experiments on a single-particle test rig. A total five sets of glass beads with a mean diameter of 0.4, 0.6, 0.8, 1.0 and 1.2 mm, respectively, are used as the test particles with an impact velocity ranging from 22 m/s to 37 m/s. It is proven that the Stronge impact theory is more accurate to describe the collision process than the Hertzian impact theory and is thus more suitable for the particle size inversion, which is validated by comparing the inversion results using these two impact theories. Meanwhile, a good agreement is observed between the measured and reference particle sizes under different experimental conditions. The mean relative error between the measured and reference diameters is mostly within 12%.

Item Type: Article
DOI/Identification number: 10.1016/j.powtec.2019.05.023
Uncontrolled keywords: Particle size, Acoustic emission, Single particle, Stronge impact theory, Plastic deformation
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA166 Instrumentation
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: Yong Yan
Date Deposited: 11 May 2019 10:50 UTC
Last Modified: 08 Jul 2019 08:42 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/73854 (The current URI for this page, for reference purposes)
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