基于虚拟仪器AVR单片机的功率测试系统的研发

摘要

对农业机械田间作业功耗测试方法进行了研究。为得到不同工作载荷下的功耗，开发了一套结构紧凑、成本低、可置于农机驾驶室的功率测试系统。硬件上，采用高精度扭矩转速传感器作为前端采集设备， AT90CAN128嵌入式单片机系统作为信号采集器，通过9芯串口上传数据并存储在工业平板电脑中。软件上，以符合ANSI标准的C语言开发工具ICCAVR编写信号采集器程序，用LabWindows/CVI开发上位机通信与数据处理程序，形成一套完整的多点功率实时测试系统。经测试表明，系统可靠性高，可广泛应用于农业机械中。%The test methods of power consumption in field operations of agricultural machinery are studied. In order to measure the power consumption under different operating load,a compact,low cost power testing system is developed,which can be placed in the cab of agricultural machinery. For the hardware,the high precision torque and speed sensor is used as the front end collection device,the embedded microcontroller system AT90CAN128 is used as the signal acquisition unit;the data are uploaded and stored into industrial tablet through 9-core serial port. For the software, the signal acquisition program is written with C language developing tool ICCAVR that conforms ANSI standard, The communication and data processing programs in host computer is developed using LabWindows/CVI; thus the integral real time testing system for multiple points of power is formed. The test shows that the system is highly reliable and can be widely used in agricultural machinery.