Abstract: A laminated sensor comprises a base stratum and a terminal stratum. The base stratum has a first surface that is affixed to a surface of a structure to be monitored. The terminal stratum is affixed to the opposite second surface of the base stratum. A connector is attached to the terminal stratum. The base stratum is provided with first and second channels and that are cut through the thickness of the base stratum. The terminal stratum is provided with holes that extend through the thickness of the terminal stratum. A first pair of the holes are positioned to register with the first channel, while a second pair of the holes are positioned to register with the second channel. A first conduit is formed by the first channel and the holes; while a second conduit is formed by the second channel and the holes. The connector connects with tubes to provide fluid communication between the conduits and a differential pressure monitoring system.

Abstract: A method for detecting separation in a structure that comprises at least two portions or layers affixed together comprises forming a cavity into the structure that passes through an interface formed between the two portions and plumbing the cavity to a monitoring system. A pressure differential is established between the cavity and a reference pressure to which the structure is exposed. A monitoring system monitors for a change in the pressure state of the cavity. Changes in the pressure state are indicative of a separation between the portions or layers.

Abstract: A method of detecting impact damage of a structure having a first surface exposed to potential impacts from an object comprises providing a sensor having a body portion that has a surface provided with an elongated channel. The sensor is fixed to a second surface of the structure such that a conduit is formed by the channel and the surface. The surface is on an opposite side of the structure to the first surface. A pressure differential is established between the conduit and a reference pressure adjacent the conduit. Monitoring is conducted for detecting any change in the differential pressure that may be indicative of a fracture or crack propagating in the second surface.

Abstract: A laminated sensor comprises a base stratum and a terminal stratum. The base stratum has a first surface that is affixed to a surface of a structure to be monitored. The terminal stratum is affixed to the opposite second surface of the base stratum. A connector is attached to the terminal stratum. The base stratum is provided with first and second channels and that are cut through the thickness of the base stratum. The terminal stratum is provided with holes that extend through the thickness of the terminal stratum. A first pair of the holes are positioned to register with the first channel, while a second pair of the holes are positioned to register with the second channel. A first conduit is formed by the first channel and the holes; while a second conduit is formed by the second channel and the holes. The connector connects with tubes to provide fluid communication between the conduits and a differential pressure monitoring system.

Abstract: A method of detecting impact damage of a structure having a first surface exposed to potential impacts from an object comprises providing a sensor having a body portion that has a surface provided with an elongated channel. The sensor is fixed to a second surface of the structure such that a conduit is formed by the channel and the surface. The surface is on an opposite side of the structure to the first surface. A pressure differential is established between the conduit and a reference pressure adjacent the conduit. Monitoring is conducted for detecting any change in the differential pressure that may be indicative of a fracture or crack propagating in the second surface.

Abstract: A method for detecting separation in a structure that comprises at least two portions or layers affixed together comprises forming a cavity into the structure that passes through an interface formed between the two portions and plumbing the cavity to a monitoring system. A pressure differential is established between the cavity and a reference pressure to which the structure is exposed. A monitoring system monitors for a change in the pressure state of the cavity. Changes in the pressure state are indicative of a separation between the portions or layers.