Data
Acquisition System (DAS)
•Data
Acquisition System (DAS) is a interface between sensor and computer.
•The
basic function of DAS is to convert Analogue signal coming from sensor to digital via A to D converter and fed to
computer.
•DAS
measures the quantity it may be physical or electrical like temperature, flow, level, pressure, voltage, current, sound etc.
•Sensor
may be photo
sensor, microphone, potentiometer, accelerometer, thermistor, strain gauge etc.
•In
most cases after going through sensor signal may need to get amplified.
•Sensor
converts the measuring quantity into unified form and then sampled by DAS.
•Sensor
is connected to DAS hardware and DAS is connected to computer via Universal Serial Bus (USB).
•DAS
hardware is microcontroller and combination of A to D, D to A converters and multiplexers, Random Access Memory (RAM) etc.
•For
supporting DAS hardware there is a drivers software in computer.
•Computer
process, measure and store the data.
•DAS
applications are controlled by computer software made from C language or java.
•Computer
analyze those phenomenon.
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