Recently, the interest in jatropha seeds has increased due to its high oil content. In order to study the mechanical characteristics of jatropha seeds, in this study, single factor tests, orthogonal tests were used. [Methods] Experimental factors were moisture content (MC)(7.11%~39.23%), loading speed(LS) (5~40mm/min) and loading direction(LD)(X,Y,Z) while investigated responses were shell-breaking force(SBF), shell-breaking deformation(SBD), energy consumption(EC) and comprehensive evaluation(CE) The order of strength of the factors affecting the loading process and the best combination of the experimental factors when pressing jatropha seeds were determined to obtain through optimizing operating conditions. [Results] The orthogonal test and variance analysis demonstrated that the primary factor influencing the shell-breaking process was LD, followed the LS and MC. The best values of factors were found to be LS of 17.48 mm/min with LD of Y for the MC of 15.44% and LS of 5mm/min with LD of X for the MC of 15.75% and the CE are obtained at 0.807 for Y and 0.603 for X, respectively. [Conclusion] This study provides a theoretical basis for further study on equipment and technology for jatropha seeds.

In order to increase the precision rate of ear picking and decrease the rate of cob damage, this paper investigates and evaluates the impact of ear picking rollers on corn stalk attitude. It then designs an ear picking roller with a straightforward structure and good ear picking effect. This is because the ear picking process and ear picking attitude are more closely correlated. To ascertain the relationship curve between the influencing factors that cause plant push back and the stalk forward tilt angle, as well as the optimal value range of the stalk feeding speed and cutting table tilt angle, virtual simulation tests are conducted using ADAMS software. The front end of the stalk pulling roller is optimized to be tapered in order to minimize the degree of forward tilt of the stalks. The optimal range of values for the bottom angle of the front end of the stalk pulling roller is 73.1°-81°. The ideal value of the bottom angle of the stem-pulling roller's front end and the parameter combination with the least amount of plant forward tilt were found using a response surface optimization test design. At a machine travel speed of 0.85 m/s, the cutting table inclination is 27.5° and the stalk tilting angle is at its lowest, which is roughly 2.5°. Through testing, it was confirmed that the conical stem pulling roller's design could successfully lessen cob damage and the forward tilt of the stalk.

Based on a photoelectric sensor and a single-chip microcomputer, a kind of automatic reseeding system is designed.