To address the insufficiency of domestic small-dose Chinese herbal granule dispensing equipment,this study introduces the"black box method"design concept and,on this basis,designs a lightweight,compact and highly accurate dispensing device.This device uses a two-phase four-wire brushless motor to drive the slider for displacement,thereby controlling the volume of the medicine falling into the weighing device to complete the weighing of the medicine.Finally,a two-phase hybrid stepping motor is used to drive the weighing device to transfer the medicine.This paper first elaborates in detail on the mechanical structure and weighing dispensing principle of this device.Secondly,the ANSYS finite element software is used to conduct a force analysis test on the weighing device,and it is concluded that the deformation of the weighing device during the working process is 9.98×10-5 mm,and the maximum deformation of the discharge port is 6.65×10-5 mm.Finally,the ADAMS software is used to simulate and analyze the motion process of the mechanism.The results show that,under the premise of ensuring the accuracy of weighing,there are no virtual points or interference in the motion process.On this basis,a prototype test is conducted,and the error accuracy of the dispensing machine is about 0.066 g,which is higher than the traditional dispensing accuracy.This equipment has strong adaptability and high dispensing accuracy,providing a new solution for small-dose precise quantitative equipment.

To address the insufficiency of domestic small-dose Chinese herbal granule dispensing equipment,this study introduces the"black box method"design concept and,on this basis,designs a lightweight,compact and highly accurate dispensing device.This device uses a two-phase four-wire brushless motor to drive the slider for displacement,thereby controlling the volume of the medicine falling into the weighing device to complete the weighing of the medicine.Finally,a two-phase hybrid stepping motor is used to drive the weighing device to transfer the medicine.This paper first elaborates in detail on the mechanical structure and weighing dispensing principle of this device.Secondly,the ANSYS finite element software is used to conduct a force analysis test on the weighing device,and it is concluded that the deformation of the weighing device during the working process is 9.98×10-5 mm,and the maximum deformation of the discharge port is 6.65×10-5 mm.Finally,the ADAMS software is used to simulate and analyze the motion process of the mechanism.The results show that,under the premise of ensuring the accuracy of weighing,there are no virtual points or interference in the motion process.On this basis,a prototype test is conducted,and the error accuracy of the dispensing machine is about 0.066 g,which is higher than the traditional dispensing accuracy.This equipment has strong adaptability and high dispensing accuracy,providing a new solution for small-dose precise quantitative equipment.

ObjectiveTo investigate methods of early postoperative rehabilitation and its effects on patients with bicondylar tibial plateau fracture treated by modified dual plating.Methods66 patients with bicondylar tibial plateau fracture from Tianjin Hospital were divided into 2 groups according to the starting time for postoperative rehabilitation: early rehabilitation group (n=30), convalescents rehabilitation group (n=36). The two groups had the same treatment since the fourth week postoperative. Tibial plateau angle (TPA) and posterior slope angle (PA) of tibial plateau were measured to evaluate the stability of proximal tibial and knee alignment. The Hospital for Special Surgery (HSS) score system and knee joint range of motion (ROM) were used as the parameters for knee function.ResultsThe mean value of TPA and PA had no significant changes, compared to the final follow-up and postoperative X-ray films(P>0.05); the differences between the two groups were statistically significant in the mean HSS score and mean value of knee flexion and extention ROM(P<0.01 or 0.05). There was significantly positive correlation between starting time and the total number of treatment was significant(P<0.01), while negative correlation with flexion ROM of knee joint and the HSS score(P<0.01).ConclusionThe correlation between rehabilitation intervention timing and functional recovery for patients with bicondylar tibial plateau fracture treated by modified dual plating is significant, early individual and systematic rehabilitation therapy can effectively improve the prognosis features of patients.