Principles of Data Acquisition

Today, many scientists and engineers use computers with PCI, PXI / CompactPCI, PCMCIA, USB, IEEE1394, ISA, or a serial port and parallel to the acquisition of data on research and laboratory, test and measurement, and even the automotive industry. Many applications used in the system to connect to the instrument to generate the data and sends it directly to the computer's memory.

In addition, there is also the use of hardware DAQ (Data Acquisition) of computers using parallel and serial ports simultaneously. To obtain satisfactory results based computer data acquisition system influenced by the following elements:
Computers, Transducer, Signal Conditioning, data acquisition hardware, and data acquisition software.

All applications suggests a link between each of the above elements in the lawyer's acquisition of data from a device to a computer-based acquisition system.

Computers in general are often used in the data acquisition process in which the existing data acquisition system drastically kecepataan maximum will require to be able to process the data. Sekaran, technology from Intel and Power PC processors simultaneously can improve the performance of a high PCI serial PCI moreover supported by well-designed similar to ISA serial and USB. With the sophistication of the PCMCIA, portable data acquired well become more flexible and be an alternative to the data obtained from a desktop computer-based data acquisition system. In the coordinate data acquisition used RS-232 or RS 485 serial interface, where data transmitted and generally have a certain interval on the data transfer.

Ability to transfer data to the computer generally has an effect on the data acquisition system. All computer capable of I / O and interrupt transfer program. Not all computers have DMA data transfer system, which increases the data transfer forwarded using existing hardware so that data is transferred directly to the computer's memory. By using this method, the processor will not be forced to work hard so that the transfer of data and freely able to process complex.