Design of vision measurement system of double optical paths with single CCD based on DSP |
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Authors: | Ming-xia He Wei Cao Xu Zhang |
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Institution: | State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China |
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Abstract: | The design of vision measurement system of double optical paths with single CCD based on the digital signal processor (DSP)
is presented. Using TMS320F2812 as the intelligent control unit, the CCD driving circuit, level conversion circuit and CCD
output signal data acquisition and processing circuit are designed. By means of plane reflectors, the optical structure of
the system is optimized, which reduces errors owing to tilt effect of the measured unit, improves measuring accuracy and makes
the system more compact. Double optical paths signal data acquisition with single CCD is demonstrated. In addition, the improved
resolution is enhanced up to sub-pixel level by the average polynomial interpolation algorithm. |
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