ARM-based Multi-channel Data Acquisition Technology Research And Development

Data acquisition system is widely used in modern industrial control system, and with an embedded processor technology, all kinds of sensor technology and the continuous development of communication technology, effectively promoted the development of the data acquisition system and constant innovation. Data acquisition system used in communications, telemetry, remote sensing, industrial all kinds of analog signal, circuit breakers, etc.Different applications in the field of data acquisition to acquisition accuracy, speed requirements also vary, but tend to intelligentize, network software and hardware can be cut, low power consumption, and the multi-channel data acquisition system.Based on the scope of application of data acquisition system so widely, that we how to build a kind of multi-channel data acquisition system based on embedded? After comparing different embedded hardware and software, and finally determined using Linux based on ARM embedded platform, and surrounding the acquisition boards to develop the Linux applications, using front-end ports as a data transmission channel, takes voltage signal from the AD collection module, realizes the functions of drawing the data waveformAt first, this paper research significance and research status of data acquisition system is introduced, the research and design of the multi-channel data acquisition system based on CorText A8. Using this system is based on the S5PV210controller, the CPU has a1GHZ frequency, meet the demand of the vast majority of data acquisition system. Front end design using ADS8345acquisition chip of TI company, the chip has8channel16bit precision, multi-channel data acquisition synchronization acquisition can satisfy the multiple signals at the same time, precision can reach0.01mV, satisfy the sampling accuracy within0.01mV in the system. Secondly, the software part using Qt for multiple channels data access and real-time data acquisition, real-time data synchronization multi-channel data curve drawing function.