Research And Design Of The Wireless Data Acquisition And Processing System

This design implements an embedded wireless high-speed data acquisition system that uses a pair of wireless modules to send and receive data, the transmitter connected to the data acquisition circuit, the receiver connected to the other side.With non-standard radio frequency band 2.4G as wireless transmission protocol agreements to carry out large-capacity data transmission. In addition to general data acquisition system for analog and digital capture capabilities, this design also allows for image and video capture. To optimize the software design in order to shorten the waiting time, so it can provide the greatest possible bandwidth, to achieve real-time video capture and display. Lower power consumption, with the purpose of improve the operation stability and reliability. At present the design has been applied to a brand of wireless video doorbell product offerings.The ARM9 chip S3C2440A as a core of a wireless communication system.In hardware ,using a high speed low power radio frequency chips nRF24L01 as a data transmission channel, using multi-function chip OV9650 camera to capture images and video data, collecting the analog data through the on-chip ADC, and realizing digital real-time acquisition through the extract pins lead to development board. Finally collected all kinds of data displayed on the LCD. In order to improve transmission efficiency, YUV color space image data launch, through a reliable way transfer to the display side, converted to RGB color space and then displayed.The video data compression use the standard H.263.