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Monitoring of self-excited vibration in grinding process using time-frequency analysis of acceleration signals
(2019-01-25)
Grinding is a finish manufacturing process for high precision parts. As the part has high value added at this stage, anomalies and defects are unacceptable. Self-excited vibration or just chatter is an undesirable and ...
Digital signal processing for self-vibration monitoring in grinding: A new approach based on the time-frequency analysis of vibration signals
(2019-10-01)
The occurrence of chatter can generate parts outside the dimensional and geometric tolerances or even cause irreversible damage, such as changes to the hardness and surface roughness of the ground part. The objective of ...
A New DSP-Based Physical Layer Encryption Technique Applied to Passive Optical Networks
(2018-09-26)
Point-to-multipoint architecture poses serious security problems to passive optical networks (PONs). In this paper, we propose the use of a new digital signal processing (DSP)-based technique to improve the confidentiality ...
Brain computer interface to answer yes-no questions
(Institute of Electrical and Electronics Engineers Inc., 2017-08)
The aim of this work is to design, implement and validate a primary communication system based on a brain-computer interface. There are people who-for various reasons-are affected in their ability to externalize their ...
Dressing monitoring with a digital signal processor
(Wit Press, 2014)
A mesh network case study for digital audio signal processing in Smart Farm
(2022-03-01)
The Internet of Things (IoT) is increasingly present in people's daily lives and in many projects involving Smart Farm monitoring. Digital processing of audio signals enables detection and monitoring of species that emit ...
Design of a Remote Signal Processing Student Lab
We describe our experience of introducing digital signal processing (DSP) concepts via a software-defined radio project using a very inexpensive TV USB capture dongle. Through a series of weekly lab exercises, the students ...
Detecção do complexo QRS através de morfologia matemática multiescalar
(Universidade Tecnológica Federal do ParanáCuritibaPrograma de Pós-Graduação em Engenharia Biomédica, 2012-09-05)
This work presents the multiscale mathematical morphology with four scales applied in the ECG signal for detection of the QRS complex. To develop this Biomedical Engineering multidisciplinary work were used knowledge of ...