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CCD is now image sensor’s mainstream technology, is also the technology is maturest, applies the most widespread visible light image sensor, by its spectral response wide, the dynamirange is big, the sensitivity and the GDOP are high, the noise is low, the resolving power high, is advantageous carries on merits and so on digitized processing and with computer connection, the application domain expands unceasingly, it in industry observation also widespread application.This topic’s duty is uses new photoelectric apparatus array CCD to use the sensor as the survey, makes the data acquisition and processing with the monolithic integrated circuit system, develops a set of non-contact survey, the low cost, the high accuracy, the high sensitivity, the intellectualized diameter measurement system, with by real-time measurement each kind of tubing in drawing or production diameter value.This system design has realized the non-contact measurement system’s overall plan, elaborated the CCD sensor, the optical system, the signal processing system selects the basis and the principle; Has determined optics image formation objective lens parameter and the focusing organization; The design realized the CCD output signal pre-processing electric circuit, the successor processing monolithic integrated circuit hardware design, the electric circuit work stable, reliable, the precision has been high; Surveys the software to use the assembly language compilation, has adopted measure enhancement measuring accuracies and so on software calibration and digital filtering, has satisfied the real-time measurement request; The ultimate analysis measuring error has produced the reason, has given the error correction method and further increases the measuring accuracy the measure.
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