Abstract
Computer numerically controlled (CNC) machines have evolved to adapt to increasing technological and industrial requirements. To cover these needs, new generation machines have to perform monitoring strategies by incorporating multiple sensors. Since in most of applications the online Processing of the variables is essential, the use of smart sensors is necessary. The contribution of this work is the development of a wireless network platform of reconfigurable smart sensors for CNC machine applications complying with the measurement requirements of new generation CNC machines. Four different smart sensors are put under test in the network and their corresponding signal processing techniques are implemented in a Field Programmable Gate Array (FPGA)-based sensor node.
Highlights
Since their inception, computer numerically controlled (CNC) machines have evolved to adapt to changing technological and industrial requirements
The results of the techniques used in each smart sensor are presented, the information obtained simultaneously in the wireless sensor network is stored on the coordinator RAM and it is transferred to a PC, using Matlab, the results are plotted
The wireless smart sensor network developed in this work is capable of coordinating different nodes for the measurement and processing of several variables in the new generation of machine tools under a completely hardware reconfigurable platform
Summary
Computer numerically controlled (CNC) machines have evolved to adapt to changing technological and industrial requirements. The necessity of machining ever smaller components and to comply with the tougher standards that limit the number of defects in these components, requires CNC machines to increase their precision, speed and accuracy and to maintain a high productivity To cover these needs, new generation machines have to perform monitoring strategies to allow autonomous self-optimization that can be done through the integration of controlprocess strategies into the machine tool control architecture [1]. The IEEE 802.11g standard has a maximum transmission rate of 54 Mbps, a maximum range of 150 m and defines a maximum number of 32 nodes for a local area network (LAN); it requires additional encoding, which results in an increase of the power consumption [26].
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