A Novel Ultrasound Technique Based on Piezoelectric Diaphragms Applied to Material Removal Monitoring in the Grinding Process

Abstract

The interest of the scientific community for ultrasound techniques has increased in recent years due to its wide range of applications. A continuous effort of researchers and industries has been made in order to improve and increase the applicability of non-destructive evaluations (NDE). In this context, the monitoring of manufacturing processes, such as the grinding process, arises. This work proposes a novel technique of ultrasound monitoring (chirp-through-transmission) through low-cost piezoelectric diaphragms and digital signal processing. The proposed technique was applied to the monitoring of material removal during the grinding process. The technique is based on changes in ultrasonic waves when propagated through the material under study, with the difference that this technique does not use traditional parameters of ultrasonic techniques but digital signal processing (RMS and Counts). Furthermore, the novelty of the proposed technique is also the use of low-cost piezoelectric diaphragms in the emission and reception of ultrasonic waves, enabling the implementation of a low-cost monitoring system. The results show that the monitoring technique proposed in this work, when used in conjunction with the frequency band selection, is sensitive to the material removal in the grinding process and therefore presents an advance for monitoring the grinding processes.

Piezoelectric Sensor Signal Analysis after Interface Changes between the Sensor and the Structure under Monitoring

“…Thus, this PZT receives the chirp signal and transmits the waves (piezoelectric effect) through the holder until it reaches the analyzed sensor (reverse piezoelectric effect). This technique was presented by [8] and it was named "Chirp Through Transmission".…”

Fabrication and Optimization of High Frequency ZnO Transducers for Both Longitudinal and Shear Emission: Application of Viscosity Measurement using Ultrasound

“…This paper is an extension of work originally presented in the International Conference on Design & Test of integrated micro & nano-System (DTS 2019) [1]. Piezoelectric sensors have many applications in different areas, like the medical, manufacturing, and research fields [2][3][4][5]. One of these applications is the piezoelectric ZnO transducer, which has been well known for about 50 years, mainly for its high-frequency applications.…”