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Major in that Bell prover gas flow standard device in use is more easily influenced by environmental impacts, there are some problems that not high accuracy and low testing efficiency, etc, traditional Bell prover gas flow standard device was improved. a kind of new-style Bell Calibration System Remote Control System was designed based on the virtual instrument technology in LabVIEW platform. Moreover,...
This paper implements a PLC(programmable logic controller) based virtual instrument that performs measure and control in mechanical characteristics test for flow control throttle in gas pipeline. The development of the instrument is based on PLC and LabVIEW IDE, which features a novel combination of leading industrial control tools to construct the virtual instrument. Since OPC(OLE for process control)...
Electronic tongues (ET) are low cost instruments to real time liquid samples determination. There is a vast field of application for ET (i.e. chemical, pharmaceutical, food and environmental analysis). Main disadvantage of ET is the large amount of data implied in the modeling and calibration process. To overcome this disadvantage an automated Sequential Injection Analysis (SIA) system is implemented...
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 application of advanced virtual instrument development platform LabVIEW, with hydraulic test bench and sensors, developed a hydraulic monitoring system based on LabVIEW. Introduced the system's hardware and software design, and realized measurement and display of the pressure, flux, temperature, displacement, velocity and acceleration in hydraulic system, and the alarm of system failures, storage,...
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