OV7640在远程抄表系统中的应用

The application of OV7640 in the system to record number of water meter long-distance

运用数字图像传感器OV7640实现水表字轮号码图像的在线采集,为远程抄表系统提供数字图像数据源。通过数字信号处理器(DSP)的主机接口(HPI)编程实现串行摄像机控制(SCCB总线)总线协议,从而完成对OV7640的初始化;系统通过多电压供电使OV7640初始化后在DSP的控制下将目标数字图像数据直接保存到系统指定的数据存储空间,并保证数字号码图像所有像素的空间相对位置不变。目前OV7640可以10帧/秒的速度为系统提供240*80的清晰、完整的水表字轮号码图像数据,因此能够满足远程抄表系统的需要。

Digital image sensor OV7640 is adopted to acquire the digital image data for recording number of water meter. HPI (Host Port Interface) of DSP (Digital Signal Processor) is programmed to complete the SCCB (OmniVision Serial Camera Control Bus) protocol, in order to initialize OV7640; dual power is used to make the OV7640 controlled by DSP to keep the image data in the appointed memory, while keep all pixels right relative position. Nowadays, OV7640 can provide the clear and integrated number image data for ...