In this note, Poly Notes Hub shares a brief knowledge on Data Acquisition System.
What is a Data Acquisition System (DAS)?
It is a collection of hardware and software that allows us to measure and control many physical quantities of something in the real world. A fully completed DAS consists of DAQ hardware, sensors, and actuators. A typical DAS contains individual sensors with the necessary signal conditioning, multiplexing, data handling, transmission path, storage, and display system as well.
Meaning of Data Acquisition
It is the process by which the has been sampled and converted into digital values which are can be understand by the computer. The system which is follow this method is called Data Acquisition System or DAS. The major components of Data Acquisition System are:
- Sensors or Transducers
- Signal Conditioner
- Multiplexer
- Analog to Digital Converter
- Display or Output Devices.
Basic Components of Data Acquisition System
Below we discuss about the basic components of this system. The basic components are:
Transducer
It is that type of component that converts one form of energy into another form of energy. Like a Microphone. The microphone converts the sound vibration into an electrical signal. So, we can say that the microphone is a transducer device. At the transducer section, it can be a sensor that measures the physical quantity and converts it into an equivalent electrical signal. After the conversion, the signal is fed to the signal conditioner.
Signal Conditioner
It is a type of device that modifies the raw analog signal that comes from the sensors or transducer devices. It is also the most essential component of DAS. Without this component, the signals can not be conditioned properly and do not perform a task. After signal conditioning, the signal is fed to the multiplexer.
Multiplexer
It is a type of device that collects data or signals from different signal conditioners and transmits all the signals through a common communication channel. The output of the multiplexer is analog in form so we have to convert it first into digital form.
A/D Converter
The analog to digital converter (A/D Converted) is converted the analog data into digital from which is comes from the multiplexer and then fed to the final output devices or Display devices. The display or output devices can be Printer, Digital Display or Magnetic Tap etc.
Benefits of DAS
- Reduced data redundancy.
- Reduced updating errors.
- Improve data security.
Limitations of DAS
- Database systems are complex.
- Damage to database affects to all the system.
- Extensive conversion cost.
Applications of DAS
- Used in Biomedical
- Used in Aerospace
- Used in Production system
Conclusion | Diploma Engineering Notes | Poly Notes Hub
Our Poly Notes Hub provides syllabus-wise notes for polytechnic or diploma engineering students of streams like Electrical Engineering, Electronics Engineering, Electrical and electronics Engineering, Electronics & Instrumentation Engineering, and Computer Science & Technology. Our website is updating day by day so keep in touch with us for new and syllabus-wise notes and topic which helps you all to do any task regarding diploma engineering.