Polymer/paper-based double touch mode capacitive pressure sensing element for wireless control of robotic arm

Abstract

In this work, a large area, low cost and flexible polymer/paper-based double touch mode capacitive pressure sensor is demonstrated. Garage fabrication processes are used which only require cutting, taping and assembly of aluminum (Al) coated polyimide (PI) foil, PI tape and double-sided scotch tape. The presented pressure sensor operates in different pressure regions i.e. normal (0 to 7.5 kPa), transition (7.5 to 14.24 kPa), linear (14.24 to 54.9 kPa) and saturation (above 54.9 kPa). The advantages of the demonstrated double touch mode capacitive pressure sensors are low temperature drift, long linear range, high pressure sensitivity, precise pressure measurement and large die area. The linear output along with a high sensitivity range (14.24 to 54.9 kPa pressure range) of the sensor are utilized to wirelessly control the movement of a robotic arm with precise rotation and tilt movement capabilities.

Numerical Modelling of Differential Pressure Sensor System for Real-Time Viscosity Measurement

“…This approach is suitable to measure the high range of pressure applications. The pipe of larger diameter in oil and gas industries are very commonly utilized therefore the placement of a fully flexible system at the inner surface of pipe offers high pressure, therefore the single [28], [35] and double [28], [36] touch mode sensors might be a more suitable option instead of the square shaped normal mode of capacitive pressure sensors, if the fluid doesn't flow. Therefore, further analysis and experiment are required to enhance the sensitivity and linear response of a fully flexible microfluidic system.…”

A Refined Closed-Form Solution for Laterally Loaded Circular Membranes in Frictionless Contact with Rigid Flat Plates: Simultaneous Improvement of Out-of-Plane Equilibrium Equation and Geometric Equation

“…For the given problem where a, h, E, υ, g, and q are known in advance, the undetermined constants c 0 , c 1 , and α can be determined by the simultaneous solutions of Equations (41), (42) and (45). Furthermore, with the known c 0 , c 1 , and α, the undetermined constant d 0 can be determined by Equation (39) or Equation (40). The problem dealt with here is thus solved.…”

“…In this paper, this plate/membrane frictionless contact problem is further solved analytically and a new and more refined closed-form solution is presented. The further and specific applications of this new and more refined closed-form solution are mainly the development of conductive membrane-based capacitive pressure sensors [36][37][38][39].…”

Polymer Conductive Membrane-Based Circular Capacitive Pressure Sensors from Non-Touch Mode of Operation to Touch Mode of Operation: An Analytical Solution-Based Method for Design and Numerical Calibration

“…In fact, non-touch mode capacitive pressure sensors have long been considered inferior to touch mode capacitive pressure sensors in terms of ease of achieving nearly linear input pressure-output capacitance relationships [36]. Therefore, in recent years, it has become difficult to find research reports on non-touch mode capacitance pressure sensors in the existing literature, while a large number of research reports have dealt with touch mode capacitive pressure sensors [38,[41][42][43][44][45][46].…”