| Wind erosion is the main mechanism of soil desertification and soil desertification is growing more serious because of it. At the sme time, it is exacerbating the destruction of ecosystems and the ecological environment deterioration, resulting in a decline in biological productivity and land productivity in a significant recession, and leading to a serious economic loss. Soil erosion wind-tunnel experiments for a study of the physical mechanism of wind-erosion can provide experimental basis and technical support well for the soil desertification prevention and containment effective. Therefore, it have profound practical significance that accurate detection and control of wind-tunnel wind speed, improving the level of wind tunnel's automated inspection, and study of wind-tunnel wind speed Automatic Monitoring System.In this paper, a set of wind speed acquisition, closed-loop speed control and monitoring alarm as one of the 0FDY-1.2-type wind-tunnel wind speed measurement and control system has developed that based on Inner Mongolia Agricultural University Soil Erosion Control Technology Laboratory's wind-tunnel testing system and control system, using virtual instrument software development environment, LabWindows / CVI as a research platform, and NI data acquisition card's analog and digital input and output functions and inverter Built-in PID regulatory function. The system Includ humane human-computer interaction control and monitoring interface, automated Switching capacity control of inverter on / off and reset, design of control system's alarm to improve system reliability. The developed wind-tunnel speed control system optimizes the original wind-tunnel man-machine interface and improve the operability of the system. By the indoor wind-tunnel test verification, the control system effectively improve the control accuracy and reliability of the existing wind-tunnel, to provide accurate experimental data for the study of soil desertification. |
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