Design And Implementation Of Sand-dust Environment Parameter Monitoring Platform

Nowadays, the area of desertified land in China is about2,622,000square kilometers, accounting for27.4%of national territory area. The desertification of land is the primary cause of sandstorm. In northern China, sandstorm occurred more frequently and serious, which brings great influence on people’s lives. Detecting and preventing of sandstorm will effectively reduce the wastage of sandstorm.. Different from the way of researching sandstorm before, we find a new way of researching sandstorm. Discard old meteorological monitoring method, this paper proposed to use the dust environment parameters monitoring platform into desert hinterland to get the data of the formation of sandstorm and the law of movement, and prevent sandstorms from the source.According to the requirement of parameter in sand-dust environment parameter monitor platform, Microcomputer C8051F020was used in the monitoring platform to control wind-speed sensor, wind-direction sensor, wind-erosion sensor, air-pressure sensor, air-temperature sensor, air-humidity sensor, sand burial sensor, the status sensor, and GPS SIM908module. The data which read from sensor can be changed into parameter which research for sandstorms by digital filtering and data conversion process. The monitoring platform sends the data which has already changed to host computer through the serial port. Digital filtering use median filter and moving average filter to eliminate the influence of glitch and random error during measuring.The sensor of sand burial-depth is designed by capacitance principle. The sand-burial-depth can be calculated by the capacitance value. The frequence of oscillator circuit depends on the value of the capacitance. And the sand-burial-depth can be calculated by counting the oscillation frequency of oscillator circuit. The status sensor is form of microcomputer C8051F020, acceleration sensor and magnetism-sensor. To improve the accuracy and reliability, the calibration function has been designed in the status sensor and sand burial-depth sensor.Microcomputer C8051F020connects with sensors and collects data from sensors by coordinating with Cyclone II EP2C5T14418FPGA chip. The system is designed in modularized circuit.Every sensor has a unified interface by using an external circuit, which is convenient to debug the system, so as to improve the efficiency of the development.