Technology HDDs (holographic digital data storage) is one of the new technology the most promising of the optical storage industry. The technology of traditional data storage, which record the individual bits of information in the form of magnetic or optical changes on the surface of a medium (such as DVD), approaching the physical limits. For its part, through the encoding in a 3D volume and recording of data using parallel blocks of memory called pages, holographic storage is loaded with promises transfer speeds of data about potential one billion bits per second, access time of a few tens of microseconds, and storage densities theoretical one trillion bits per cubic centimeter.

The CompactRIO for prototyping system HDDs

HDDs Our prototype consists of two sub-critical systems:
a system for controlling electro-optical engine using NI CompactRIO chassis equipped with an FPGA than 3 million gates and a video decoding system based on a Xilinx FPGA board incorporating 8 million gates. The CompactRIO system controls a linear motor, a stepper motor, a galvanic mirror and a CMOS sensor. Each loop motion control requires precise control, so we use return signals to monitor and detect data. Unlike a traditional processor board, CompactRIO allows us to customize the timing pulse generator on the resolution of a single FPGA clock using the NI LabVIEW FPGA. To avoid slippage, we developed algorithms for motion control in creating complex mathematical functions customized for acceleration and deceleration. Separately, we have developed the power circuitry for all three types of engines and modules were connected to I / O CompactRIO. In addition to motion control motors, CompactRIO communicates with the FPGA board video decoding developed our own technology with signal processing for video retrieval and control of the CMOS sensor. CompactRIO also controls the speed of data transfer by checking the amount of data accumulated in the buffer to the MPEG decoder, which varies greatly depending on the speed.