CAJ | 학술논문

为实现对挖掘机作业过程中液压系统的压力及流量、工作装置油缸位移、上车回转角度等参数数据的同步采集，利用虚拟仪器技术构建了基于NI CompactRIO硬件平台的挖掘机测试系统，通过FPGA对输入不同I/O模块的信号进行同步采集。针对工业编码器输出的SSI信号，采用图形化编程语言LabVIEW编写通信协议，并结合高速双向数字I/O模块对其进行采集。通过网络共享变量将数据传送至上位机中，实现数据的实时显示与存储。试验结果表明，该系统在复杂工况下运行稳定。
위실현대알굴궤작업과정중액압계통적압력급류량、공작장치유항위이、상차회전각도등삼수수거적동보채집，이용허의의기기술구건료기우NI CompactRIO경건평태적알굴궤측시계통，통과FPGA대수입불동I/O모괴적신호진행동보채집。침대공업편마기수출적SSI신호，채용도형화편정어언LabVIEW편사통신협의，병결합고속쌍향수자I/O모괴대기진행채집。통과망락공향변량장수거전송지상위궤중，실현수거적실시현시여존저。시험결과표명，해계통재복잡공황하운행은정。
In order to acquire the parameters of an excavator system synchronously in the course of its work,such as the pressure and flow rate of the hydraulic system,the displacements of hydraulic cylinders and the rotational angle of the upper body,a testing system for the excavator is built based on NI CompactRIO with the technology of virtual instrument. The system can be used to ac￣quire signals from different I/O modules synchronously with FPGA. For acquiring the SSI signal from an industrial encoder,the com￣munication protocol is written with LabVIEW and a high-speed bidirectional digital I/O module is used. The data acquired by Com￣pactRIO is sent to the principal computer through network shared variables,saved and displayed in real time in the principal comput￣er. The experiments show that the system runs stably under complex conditions.