Research On Modular Robot For Adolescent Science And Technology Education

Educational robot is a teaching tool that integrates multiple disciplines such as mechanics,automation,electrical,electronics,and computers,which can realize complex and diverse teaching tasks.Its main purpose is to cultivate young people's interest in science and their ability to innovate.With the popularization of educational robot technology in the classroom of primary and middle school students,it is very important to develop a robot which has low cost,good expansibility and openness and is oriented to youth science and technology education.Therefore,this paper developed a multifunctional educational robot and its control system for young people by combining relevant technologies of artificial intelligence.Firstly,the research status,functional features and deficiencies of educational robot at home and abroad are analyzed in detail.The modular construction scheme of the educational robot is determined,and the software and hardware scheme design of the educational robot control system is completed.The specific functions of the educational robot are determined according to the teaching requirements,including obstacle avoidance,tracking,voice control and facial expression recognition.Secondly,the key technologies are studied and the optimal control scheme is determined.The design of ultrasonic obstacle avoidance module,tracking module,voice control module and expression recognition module are completed,and the design and production of the core controller Raspberry Pi extension is completed.The interface of teaching experiment module and function extension interface are designed.This modular educational robot has many functions.At the same time,it suits the student programming practice and has strong expansion function,which is suitable for the youth robot science and technology education.Thirdly,the basic structure of the model of the education robot is constructed,and the control platform of the education robot is designed on this basis.This platform is a three-layer control platform combining the upper layer,the lower layer and the extension layer.The software system design of the educational robot is completed,including ultrasonic obstacle avoidance,tracking control,voice control,facial recognition and man-machine interaction software.A good human-computer interaction interface is designed,which realizes various control functions and expression recognition functions of the educational robot,and improves the interactive and operability of the educational robot.Finally,the teaching experiment function and the extended function example are demonstrated.The various functions of the educational robot are tested and analyzed.In the ultrasonic obstacle avoidance experiment,the detection distance should not be less than 5cm,otherwise it will reach the detection blind area of the ultrasonic sensor.In the trace control experiment,the completion rate of the robot can reach 80%.The accuracy of speech recognition in speech control can reach more than 88%.The accuracy of expression recognition experiment can reach more than 68%.It is found that the experimental results of each function can achieve the expected effect,which verifies the rationality and feasibility of modular educational robot design.