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It's the trend that sensor network become more standardized and unified as internet of things develops continuously. Aiming at resolving the problems arising from variety of sensors type and interface, this paper presents a design idea of a standardized sensor network node based on virtual instrument and IEEE 1451 standard, and expounds the realization of this sensor node. A concept of sensor node...
This paper presents an intelligent testing system for underwater transducer array by using virtual instrument technology. The testing system is used to test the identities between transducer and transducer of the underwater transducer array. The hardware and software architecture of the testing system are introduced. The system software is developed on the LabVIEW. LabVIEW, a graphical programming...
The aim of this work is to describe a new instrument based on the negative expiratory pressure technique able to detect expiratory flow limitation (EFL) in patients with respiratory diseases. First, we describe the design details of a virtual instrument able to apply a low pressure at the mouth during tidal expiration, simultaneously measure flow and pressure, and automatically elaborate flow-volume...
The pipeline leakage monitor system based on Virtual Instrument are introduced in this paper. As an important means of transportation, pipelines have been used all over the world. Pipeline leakage occurs frequently due to pipeline defect, which not only causes great loss of economy, but also leads to serious pollution to the environment. A real-time monitoring system for pipeline leak is established...
A PC based system for non-invasive, in-vivo measurement of carotid artery compliance is proposed here. The equipment is a low cost and reliable alternative to the expensive B-mode scanner for vessel wall tracking and stiffness measurement of the artery. The system gives an accurate recording of the distensibility waveform of the carotid artery that could then be used to estimate the various measures...
The choice of algorithms and the hydrophone array is the key of getting high precision in underwater targets detection. Using LabVIEW and 8 channel data acquisition card the underwater targets noise was gathered. Based on the MATLAB, the algorithms of underwater targets estimation have been confirmed. The water tank experiments have shown that this system can realize to acoustic signal gathering,...
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