Opto-fluidic Tactile Sensor Array By Laser Direct Writing

With the rapid development of computers and communication technology, information processing capacity continues to increase, in addition to the continuous improvement of the operating speed of the device, but also requires more interactive interface to facilitate the reaction rate is increasing.Tactile human perception of the external environment is an important sense, is the realization of human interaction with the surrounding objects, an important means. However, the structure of the human body than all of the current bionic devices are much more complex, from the touch signal generation, transmission and feedback to the cerebral cortex to identify, among all these processes can be completed within a very short time. Optics-based touch-sensing technology in the production of high-speed than the existing capacitors, resistors, such as surface acoustic wave touch sensor technology with greater potential and advantages.In recent years, more and more optical sensor applications, has attracted worldwide attention in many research institutions. The optical touch sensing technology mainly refers to the use of light as an information carrier, the light is modulated, an optical transmission parameters vary with the outside world of technology. It has high resolution, high precision, anti-electromagnetic interference, low power consumption, etc., and the use of fiber optic cable, etc. can greatly simplify the circuit arrangement.This optical touch sensing technology to study for the purpose of designing a new type of micro-flow cell optical touch sensor structure, to achieve continuous external pressure ratio measurement, the robot can be used for the simulation of tactile touch screen and the small size of the application; Laser direct writing technology to produce devices, the process is simple, reduce device costs and improve productivity. The main contents of this paper include:First, the introduction of the current robot tactile sensing technology and touch-screen technology, the basic situation, a detailed analysis of the various types of electrical and optical sensor works, electrical touch more work and optical characteristics of touch, outstanding optical touch high-speed, high resolution and so on.Secondly, the design of a new type of micro-flow cell optical touch sensor structure, increase of external pressure to achieve a continuous scale measurement. simple structure, quick response. For three different cross-sectional area of the waveguide structure in optical design software ZEMAX simulation analysis, discussion of waveguide cross-section size of the sensor signals, and this was also an important factor in the decision device size.Again, this micro-structure of the preparation process and the process in detail. Laser direct writing systems to produce devices that can receive the same fine structure and design, and high accuracy, speed and low cost. Especially in the preparation of an array structure to improve the efficiency of great significance.Finally, the experimental platform build system for the preparation of the touch sensing unit for testing. Experimental results show that the touch sensor structure can realize optical signal with changes in the proportion of outside pressure, continuous, and sensitivity 0.995mV/kPa.