A Research about Acquisition and Transmission of the Water Meter's Image Based on STM32

Abstract:

This paper introduces the hardware and programming involved in collecting the image of the digital code wheel by microprocessor STM32 directly driving camera chip OV7670 and the transmission of collected image. This design simplifies the hardware structure to the greatest extent and minimizes cost. Our design has three advantages. Fist, direct driving saves the intermediary register chip, simplifies the circuit and also reduces the amount of elements used. Second, by using the CMOS digital image sensor with windowing function—OV7670 to capture the image of code wheel we simplify the hardware structure and reduces the cost because of the D/A conversion circuit and complex programmable logic device contained in OV7670. Third, we successively solve the problem of the small capacity (20k) of STM32F103C8T6 chip’s SRAM by cutting out 24080 images from 640480. So time spent on data transmission and processing can be shortened.

• Periodical: Advanced Materials Research (Volume 1037)
• Pages: 187-190
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1037.187
• Online since: October 2014
• Authors: Yan Lin Xue*, Bin Wei Chen
• Keywords: Direct Driving, Image Acquisition, OV7670, STM32

References

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