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为分析钻杆的井下受力状态,应用直梁应变片式测力传感器,研制了一种基于虚拟仪器平台的钻杆四分量力测量系统。传感器系统随钻柱同轴旋转,终端单片机定时采集试件所承受的径向力、轴向力和扭矩等参数。L abV IEW调用串口A ctiveX控件的M SComm中断通讯模式,并结合I/O子系统设置和数据同步方法,实现了串口无线采集和钻杆转角测量的多线程检测。实验结果表明,该系统能够实现模拟钻杆在低钻速条件下(<180 r/m in)的实时测量,为钻杆振动特性的理论分析提供了实验依据。
In order to analyze the downhole stress state of drill pipe, a straight beam strain gauge load cell was used to develop a four-component force measurement system of drill pipe based on virtual instrument platform. The sensor system rotates coaxially with the drill string. The terminal microcontroller collects parameters such as radial force, axial force and torque collected by the specimen regularly. L abv IEW calls the M SComm interrupt communication mode of the A ctiveX control of the serial port, and realizes the multi-thread detection of wireless acquisition and measurement of the drill stem angle in combination with the I / O subsystem setting and data synchronization method. The experimental results show that the system can simulate real-time measurement of drill pipe under low-rate drilling conditions (<180 r / m in) and provide experimental basis for the theoretical analysis of drill pipe vibration characteristics.