The Research Of The Precise Diffraction Grating Data Processing

The grating sensor is widely used in the modern precision measurement territory , especially in the measurement of linearity displacement and angle displacement, which has play a very important role. Limited by the scratching technology and volume of optical and electric switching equipments ,the main way of measuring precision improvement is to improve electrical counting and divining methord. By software configuration and hardware to define acquisition .system function and way of working ,and maximize the openness is the development direction of fine grating measurement.The design that based on the PCI bus technique of precise grating data processing system of this article realizes microcomputer control about grating displacement measurement and data processing. By applying grating signal digital division technology we can divide the grating signal into multiple ways, which is very convenient for the customers.The paper analyzes brief develop status in the world of the grating sensor, and introduces raster Mole stripe signal differentiates and figure subdivided technique, and in the meantime, designs the hardware circuit and software of the system. Based on system function analysis, we designed system hardware circuits and system software. We study and analyze PCI bus protocol and apply PCI9050's interface chip to design the interface card of PCI bus and compile drive software of its interface card.The grating sensor interface which is based on PCI bus of this paper has a lot of merits, such as miniaturized, portable and intelligent and so on. The test demonstrates that the entire system is stable and reliable, and essentially meet the design requirement which the paper was expected propose, the software can drive grating signal 50 subdivides or 100 subdivide, moreover, it is merely require to revise subdivided software to add the grating signal subdivided figure.