Embedded Capacitance Sensor Array for Structural Health Monitoring of Pipeline Systems

Embedded capacitance sensor arrays for Structural Health Monitoring (SHM) of piping is explored. Using a capacitive electrode layer system embedded within Fiber Reinforced Polymer (FRP) layers, to detect potential damage and loading conditions. The sensors are comprised of an electrode array, and allow changes in system capacitance to be monitored. Combined with baseline data points, subsequent measurements can provide indication of applied force changes within composite patched or composite reinforced piping, allowing for repair or reinforcement health status monitoring. Unlike traditional sensors which only measure a single point, the proposed approach incorporates an electrode array technique, while capacitive sensing affords the ability to detect minuscule changes in force on the whole pipe surface. Thus, providing detection and monitoring capabilities beyond those currently employed by industry such as optical fiber or strain gauge.