Data Acquisition System
The collection of hardware and software components that enable a computer to receive physical signal.
Data acquisition process
Measures analog and digital signals Convert measurements to digital values.
Data acquisition components
Sensors Signal conditioners Analog to digital and digital to analog converter Software
Basic principle of sensors
Transducer: a device that converts energy from one form to another. Sensor:converts a physical parameter to an electric output. Actuator: convert an electric signal to a physical output.
Analog - Digital Converter (ADC)
Types of ADC
Integrating ADC - Internal voltage controlled oscillator.It is slow.
Successive approximation ADC - Digital code driving the analog reference voltage
Flash ADC - A bank of comperators