Dynamic analysis and experimental research of the novel needle punched rubber bark detection device

Abstract

A novel NPRBDD is developed to obtain suitable cutting depth of rubber bark in the harvesting process of natural rubber. Based on experimental data and the optical microscope photographs of slice diagram of the pinhole in rubber bark, the acupuncture-detection process of NPRBDD can be divided into three stages of pre puncture stage, squeezing stage and puncture stage. The main bending deformation of probe occurs in the squeezing stage, which will affect the detection accuracy of NPRBDD. Regarding the motion characteristics of the probe in the squeezing stage, a new expression of finite element method are proposed and used to establish nonlinear dynamic variational equations of probe. And a fractional order model was used to fit the force on the probe tip. According to numerical simulation, the probe of NPRBDD is selected that stainless-steel-316L probe with 25mm length and 0.25mm radius. Then, through field experiments, the validity of NPRBDD is validated, and it can be found that the stability of detection result of NPRBDD is higher than that of traditional measurements.