It is used to convert physical parameters to electrical signals (change in voltage), then convert those signals to a form that can be further converted to Digital signal.
DAQ card (NI USB6009): DAQ card (Data acquisition card) is equipped with sensors, signal conditioning circuit, Analog to digital converter.You will use this software to make a controller which will replace the existing PID microcontroller present in the DCS. it is a system-design platform and development environment that was aimed at enabling all forms of the system to be developed. LabView: The name LabVIEW is a shortened form of its description: Laboratory Virtual Instrument Engineering Workbench.The DCS concept increases reliability and reduces installation costs by localizing control functions near the process plant but enables monitoring a supervisory control of the process remotely in a single place in the control room. DCS (Distribution Control System): A distributed control system is a computerized control system for a processor plant, in which autonomous controller are distributed throughout the system but there is central operator supervisory control.This pressure value is used to control the pressure controlled valve to control the flow and or pressure. In case of LabVIEW after the generation of current signal it would be converted in voltage signal because the DAQ card (NI USB6009) is not able to handle current value directly so using a Current to Voltage converter to convert current signal in terms of voltage, the current signal is changed into voltage and then given to LabVIEW (DAQ) based controller and then the value is processed and given back to the Voltage to Current converter which converts the voltage to current and this current signal is given back to Current to pressure Converter which converts the current signal to pressure signal. In case of PID controller, the pressure signals are converted in the current signals by the Pressure to current converter and then this signal is given to the PID controller and then after the manipulation, the current signal is again converted to pressure signal and then the pressure valve is set accordingly.
The main objective of this project is to make a controller in LabVIEW which will be used instead of the existing microcontroller based PID controller present in the DCS to control flow and pressure measurement system. Embedded Systems (Career Building Course) Wireless Communication (Career Building Course)ģ. Looking to build projects on Electronics?:Įlectronics Kit will be shipped to you and you can learn and build using tutorials.
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