Development Of Data Acquisition System For Wire Rope Tension

The paper designs a data acquisition system for wire ropes'tension, using computer to collect wire ropes'tension data of some experiment tables in an area. The main function modules are: the sensor circuit, regulated power supply, data acquisition and processing module, wireless data transmission module, display module, data calibration, data save, historical data display, drawing curves and so on.The system uses embedded microcontroller C8051F330 as the MCU, which has integrated the A/D module, SPI interface and so on. Sensor data collector uses an 18-bit high-resolution analog-to-digital converter chip--FS511, which has integrated switching circuits, operational amplifier, digital filter, etc. Designs a regulated power supply, its voltage difference between input and output is 0.2V, filling the vacancy of market. Using DTD462A as the wireless data transmission, which ensures the transmission distance and lower error code rate in 433MHz, and simplifies system structure. The software includes microcontroller programming and PC programming. Using C programming language writes A/D conversion program and system control, data communication program, etc. With LabWindows/CVI as development platform to design PC programming, designs a intelligent monitoring system, which has a man-machine dialogue interface, can display real-time data, can draw data curves, has the fault alarm function, forecast function and so on. In data calibration, raises a nonlinear correction method, reducing the influence of the nonlinear error. There being many disturbance elements in the system, some anti-disturbance methods are applied in the hardware and software.Through the laboratory test and field application for several months, the system hardware and software functions have satisfied the user's requirements, the performance index is excellent.