Signal processing for fish monitoring system of net-cage in deep water based on LabVIEW

Author(s):  
Xu Xiaomei ◽  
Zhang Xiaokang ◽  
Zhang Lunhao
2014 ◽  
Vol 565 ◽  
pp. 36-45
Author(s):  
Hadjadj Abdechafik ◽  
Kious Mecheri ◽  
Ameur Aissa

The objective of this study is to develop a process of treatment of the vibratory signals generated during a horizontal high speed milling process without applying any coolant in order to establish a monitoring system able to improve the machining performance. Thus, many tests were carried out on the horizontal high speed centre (PCI Météor 10), in given cutting conditions, by using a milling cutter with only one insert and measured its frontal wear from its new state that is considered as a reference state until a worn state that is considered as unsuitable for the tool to be used. The results obtained show that the first harmonic follow well the evolution of frontal wear, on another hand a wavelet transform is used for signal processing and is found to be useful for observing the evolution of the wavelet approximations through the cutting tool life. The power and the root mean square (RMS) values of the wavelet transformed signal gave the best results and can be used for tool wear estimation. All this features can constitute the suitable indicators for an effective detection of tool wear and then used for the input parameters of an on-line monitoring system. Nevertheless we noted the remarkable influence of the machining cycle on the quality of measurements by the introduction of a bias on the signal; this phenomenon appears in particular in horizontal milling and in the majority of studies is ignored


2013 ◽  
Vol 756-759 ◽  
pp. 636-640
Author(s):  
Xin Qian ◽  
Dong Wang ◽  
Xiang Xian Zhu

By analysis of WSN node signal processing, we designed a node structural system in WSN agricultural monitoring system and use the ideas of this system to complete the development of wireless sensor nodes. TinyOS, as the node software development system is chosen to test the node performance. The results showed that, the node meets the design requirements, and it can be effectively applied in WSN agricultural monitoring system.


Author(s):  
Minto Waluyo ◽  
Basuki Rahmat ◽  
Tuhu Agung Rachmanto ◽  
Mohamad Irwan Afandi ◽  
Helmy Widyantara ◽  
...  

2018 ◽  
Vol 6 (3) ◽  
pp. 24
Author(s):  
B. SRIDHAR ◽  
DEVI B. SHARMILA ◽  
A. LAVANYA ◽  
PRASUNA B. GHANA ◽  
RAJ G. PRUDHVI ◽  
...  

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