Flexible Resistive Tactile Sensor Signal Acquisition System Research And Design

The skin is an indispensable part of the human body.Humans use the skin to perceive the complex external environment,while the robot uses the electronic skin to sense the information of the contacted object.With the rapid development of artificial intelligence,Internet of Things,smart devices,and new materials,people are concerned with electronics.There is a higher demand for the accuracy of the tactile perception of the skin and the timeliness of data collection.Research and design of flexible resistive tactile sensor signal acquisition system provides research basis for the design of resistive high bionic performance electronic skin.This paper uses the newly developed flexible resistive touch sensor to design and develop a signal acquisition system.The system can realize high-speed,real-time and accurate acquisition of the pressure signal of the sensor array,and transmit the processed signal to the upper position through the wireless USB communication module.Machine,display the size and distribution of pressure in real time,save and record relevant data.The main work of this paper is as follows:(1)Study the current history and current status of flexible sensors,electronic skin and signal acquisition systems,summarize the shortcomings of the three,and determine the main research content of this paper.(2)Discuss the key technologies involved in implementing a flexible resistive tactile sensor signal acquisition system.Including resistance sensor signal acquisition technology,sensor array signal acquisition technology,A/D signal conversion technology and asynchronous serial communication technology.(3)Design the hardware part of the flexible resistive tactile sensor signal acquisition system.First,the overall design,for the sensor array signal acquisition method,design two options:sequential scanning signal acquisition and row and column scanning signal acquisition.Secondly,hardware selection and circuit design for two signal acquisition schemes,including selection of main control chip,design of sensor array scanning circuit,design of power supply module circuit,design of wireless USB communication module circuit,PCB design and overall Circuit connection debugging,etc.(4)Design the software part of the flexible resistive tactile sensor signal acquisition system.According to the overall idea of the system and the design of the hardware circuit,the software of the flexible resistive tactile sensor signal acquisition system is developed,including the flexible resistive tactile sensor array signal acquisition module,signal processing module,communication module,etc.,as well as the programming of the host computer(PC).Finally,the overall design of the flexible resistive tactile sensor signal acquisition system is completed,and the system is tested with known resistance.(5)Designing a tactile sensing experiment of a flexible resistive tactile sensor signal acquisition system.Including flexible resistance sensor repetitive and sensitivity experimental design,electronic skin pressure sensing experimental design,electronic skin deformation sensing experimental design and electronic skin application sensing experimental design.Through the above research,design and experiment,the paper finally completed the pressure tactile signal sensing experiment of electronic skin,the electronic skin deformation tactile sensing experiment and the application sensing experiment of electronic skin,and verified that the flexible resistive tactile sensor can be used as the carrier of electronic skin,indicating the flexible resistance.The feasibility of the design of the tactile sensor signal acquisition system provides a basis for the study of tactile perception of electronic skin and lays a foundation for the research of tactile perception of agricultural manipulators.