Design And Development Of Field Data Acquisition System Based On Wireless Data Transmission Technology

In order to improve the working efficiency in field information acquisition and according to the needs in "Precision Agriculture", field data acquisition systems based on wireless technology were designed and developed. Reid data can be collected, stored, processed and transmitted wirelessly by RF wireless data transmission module or GSM short message mode. According to different requirements, field data acquisition systems based on single chip processor(89S51) and on ARM processor(S3C2410) were designed respectively.The hardware of data acquisition system based on single chip processor was composed of signal input circuit, A/D conversion circuit, power circuit, serial interfaces expansion circuit, LCD control circuit, CF card circuit, keyboard circuit, RF wireless data transmission module and GSM module. The system can collect 8 channels of analog signals and 2 channels of digital signals simultaneously. At the same time, the system can collect GPS information by connecting GPS receiving device. All the data received were stored in CF card which can store the data safe even the system is out of power. The data collected can be transmitted by RF wireless data transmission module mode or GSM short message mode. The data acquisition system can be used as both portable device and fixed device that composing a network. Corresponding communication protocol was designed.The innovations of the system based on signal chip processor are as follows:1. The system was designed and developed with the MCS51 as CPU and CF card as storage media.2. The system can transmit the data wirelessly by the RF wireless data transmission module or GSM module on different conditions.3. The system can collect the GPS information by connecting the GPS receiving device.4. The system can be used as both portable device and fixed device that composing a network.The data acquisition system based on ARM processor has camera, GPS receiving module, GPRS module and RF wireless module inside. The system can collect 8 channels of analog signals ,4 channels of digital signals and GPS information simultaneously. The data can be stored in IDE hard disk or other storage devices with USB interface. The data collected can be transmitted wirelessly by RF wireless data transmission module mode.