Tactile Reproduction Device Based On Perception Characteristics With Interactive Function

Tactile sense is an important channel for humans to perceive the surrounding environment,and it is almost the only way of perception among the disabled.However,this tactile sensing channel throughout the body did not play its role in the process of human-computer interaction.Traditional tactile reproduction devices are large in size and complicated to operate.The reproduced tactile information cannot convey clear information to the user,and it needs to be matched with other interactional devices at the same time.Which seriously affects the immersion and interaction of human-computer interaction.This situation limits the further development of human-computer interaction and also hinders the in-depth application of virtual reality technology.Aiming at the lack of tactile sensation in the traditional human-computer interaction process,this paper analyzed the objective needs in the human-computer interaction process,and designed a tactile reproduction device based on perception characteristic with interactive functions,which integrates tactile reproduction and gesture interaction functions,and explored the skin perception ability in the device’s action area.Subsequently tactile stimulations that consistent with the perception characteristics of skin was designed.The results showed that the device designed in this paper improve the immersion of human-computer interaction.By analyzing the domestic and foreign research works,the advantages and disadvantages of the existing tactile reproduction devices and human-computer interaction methods was summarized.This paper proposes the research goals of tactile reproduction device based on perception characteristic with interactive functions.In the analysis of specific function realization,it is divided into two subsystems: upper computer and lower computer.The upper computer realizes the functions of virtual scene construction,virtual object control and tactile reproduction demand generation,while the lower computer realizes attitude detection,actuator driving,temperature control and other functions.Wireless communication is adopted between the upper computer and the lower computer.In the design,the device is divided into hardware and software parts.The hardware part mainly includes the principle analysis of actuators and sensors,hardware circuit design,PCB drawing,etc.With ATmega2560 as the core with appropriate circuit structure,two different forms of devices are designed,the integrated circuit board is drawn using EDA software,and the shell is designed.The software part includes the system design of the upper computer and the lower computer.The upper computer mainly uses Unity 3D to build virtual scenes,designing script programs to realize object actions and special effects in the scene,and formulating the communication protocol between the upper computer and the lower computer;the lower computer software realizes the function of driving,detection,display,and communication,which are separately planned for the subroutine processing flow,and finally the software programming of the lower computer is completed in the Arduino IDE.In order to verify the practicability of the device,this paper first tested the response performance of the actuators,and verified the availability of the communication protocol and wireless communication through the joint test of the upper and lower computer.A tactile stimulus intensity perception experiment was designed,and based on the experimental results,stimulus levels in accordance with the skin perception characteristics of the action area were formulated as guideline to achieve tactile reproduction.Finally,volunteers were recruited to use the device to complete two virtual chemistry experiments.The performance of the device was estimated in the form of scale.Compared with the traditional experiment and pure visual virtual experiment,the results expressed that the device in this paper was more attractive.Finally,the analysis,summary and prospect are carried out.