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针对现有棉花打顶设备作业过程中棉花顶部仿形效果差,且受作业环境影响比较明显的问题,提出了仿形板与角度传感器相结合的方案,研制了一种基于FPGA的棉花高度仿形装置。确定了打顶期内棉株的弹性模量,并运用有限元仿真软件模拟了棉株受力状态,确定了核心部件仿形板的材料属性及尺寸参数。田间试验结果表明,该装置能够对棉花高度进行仿形,机具作业速度在3.24 km/h内时,打顶率最高可达90.0%,打顶效果较好,机具结构设计合理,为棉花打顶机械化提供了技术支持。
Aiming at the problem that the top cotton has poor profiling effect and obvious impact on the working environment during the operation of the existing cotton toping equipment, a scheme combining the profiling board and the angle sensor is proposed, and a cotton imitation based on FPGA is developed Shape device. The elastic modulus of the cotton plant during the topping period was determined. The stress state of the cotton plant was simulated by the finite element simulation software, and the material properties and size parameters of the core plate were determined. The field test results show that the device can copy the height of cotton. When the working speed of the machine is within 3.24 km / h, the toping rate can reach as high as 90.0%, the topping effect is better, the mechanical structure design is reasonable, Mechanized provided technical support.