Research On Bicycle Saddle Design Based On Joint Displacement And Physiological Signal Detection

Bicycle,as a light,convenient and pollution-free means of transportation,has been deeply loved by the public.For cyclists,saddle is an important accessory which is easier to adjust than other bicycle accessories and directly affects riding experience.Taking bike-sharing,which has a high utilization rate at present,as an example,it is necessary to properly adjust the saddle position before riding to meet the rider’s use requirements.However,in the actual travel process,ordinary cyclists can only determine the saddle position by subjective feeling and manual adjustment for many times.This method not only lacks scientific theoretical basis,but also is tedious and time-consuming.In addition,when the riding state changes and the saddle type needs to be changed,the existing saddle cannot realize the conversion function.In this case,if the riding exercise is carried out for a long time,it is easy to cause compression and pain in buttocks and reproductive areas.Therefore,this paper designs a bicycle saddle with convenient and accurate seat tube adjustment and variable saddle shape,which on the one hand subverts the previous adjustment mode of bicycle saddle,on the other hand effectively helps the rider to improve the comfortable feeling of riding,which is beneficial to his health.In this paper,under the theoretical background of ergonomics and CMF research,the cyclists with different height segments are taken as subjects,and the saddles of ordinary leisure bicycles are taken as research objects,and the cyclists’ joint displacement and physiological signals are studied.Using Motion Analysis human motion capture system to record the change of rider’s joint displacement,and explore the relationship between waist and knee joint displacement and rider’s saddle position;At the same time,Biopac physiological signal recording system is used to collect and analyze the electromyographic signals of the rider’s leg muscles,so as to obtain the fatigue condition of the rider’s leg muscles when riding in different saddle positions,and to obtain the suitable saddle positions of the rider in different height segments.Furthermore,the human-bicycle saddle system is analyzed by human mechanics,and the body energy consumption of cyclists in different saddle positions and different height segments is calculated to verify the research results.Through the analysis of the above research results,it is found that within the effective saddle position range,when the extreme range of Euclidean distance of the rider’s waist and knee joint displacement is larger,the lower the fatigue of the leg muscles and the less the body energy consumed by riding,so the saddle position is more suitable at this time.Then,sorting out the types of bicycle saddles at present,analyzing the user survey results of saddles,adopting ergonomics design method,based on the research results of cyclist’s joint displacement and physiological signals,developing the modeling design of bicycle saddles,and carrying out human factors analysis on new saddles through Jack virtual simulation technology,fully verifying the effectiveness and feasibility of the new saddle design.The new saddle designed in this paper solves the problems encountered by cyclists when they are facing the adjustment of saddle position.At the same time,cyclists can adjust the saddle type according to their own needs to adapt to different riding environments.The completion of this paper has greatly reduced the riding fatigue,optimized the riding process,improved the riding experience and protected the rider’s health,which is of great significance.