Disclosed is a tamper evident backing system, comprising an adhesive backing, the adhesive backing having a main body and sectioned portions, wherein the adhesive backing includes an outer surface configured to adhere to a second surface, and wherein upon removal of an attached adhesive backing, said sectioned portions are configured to detach from main body and remain on said second surface.

Various tactile sensors and associated methods are enabled. For instance, a sensing apparatus comprises a photosensitive sensor. A compound-eye structure is on the photosensitive sensor and an elastomer layer is on the compound-eye structure. A reflective layer is on the elastomer layer, opposite the compound-eye structure and a light source emits light between the reflective layer and the compound-eye structure.

A sensor arrangement using an optical fiber and methodologies for performing an analysis of a subterranean formation, such as a subterranean formation containing a hydrocarbon based fluid. The sensor arrangement may be used to measure one or more physical parameters, such as temperature and/or pressure, at a multiplicity of locations in the subterranean reservoir. The sensor arrangement may comprise a sensor array comprising an elongated outer casing for insertion in the subterranean formation and into a fluid in the subterranean formation. The sensor array may comprise an optical fiber defining an optical path that links one or more temperature sensors and one or more pressure sensors and transports measurement data generated by the temperature and pressure sensors. A data processing system may be connected to the sensor array to receive measurements from the sensor array and to compute one or more values of a property of an extraction installation operating on the subterranean formation.

A system for assaying forces applied by cells includes an optically transparent substrate comprising a soft material having a Young's modulus within the range of about 3 kPa to about 100 kPa. An array of molecular patterns is disposed on a surface of the optically transparent substrate, the molecular patterns include fluorophore-conjugated patterns adherent to cells. The system includes at least one light source configured to excite the fluorophore-conjugated patterns and an imaging device configured to capture fluorescent light emitted from the fluorophore-conjugated patterns. Dimensional changes in the size of the patterns are used to determine contractile forces imparted by cells located on the patterns.

Disclosed is a package handling system comprising: an indicator designed to display a mishandling indication upon application of a force in excess of a predetermined threshold force.

An optical probe for a gas turbine engine includes a housing. Also included is a plurality of optical fibers, a portion of each of the optical fibers secured to fiber holders. Further included is an optical head disposed within the housing and having channels extending in a longitudinal direction of the optical head, the fiber holders disposed within the channels. Yet further included is a cap disposed within the housing and operatively coupled to the optical head, the plurality of optical fibers extending through the cap. Also included is an inner tube operatively coupled to the cap, the plurality of fibers extending through the inner tube.

Pressure sensing having 2-D resolution is provided by an array of optical waveguides having wave-guide intersections (e.g., intersecting rows and columns). Pressure induced cross-coupling between intersecting wave-guides is enhanced by including mechanical structures at each intersection that enhance local waveguide bending. For example, such structures can be rigid rings around the wave-guide intersections.

The present application provides a floor board unit, a floor board and an IoT home system. The floor board unit includes a floor board body which can switch between a light-transmissive state and a light-tight state, a floor board controller, a light emitting layer and at least one first sensor. The light emitting layer is below the floor board body. An output terminal of the first sensor is electrically coupled to an input terminal of the floor board controller. The light emitting layer is configured to emit incident light towards the floor board body. The floor board controller is configured to control the floor board body to be in the light-transmissive state when the light emitting layer emits the incident light. The first sensor receives reflected light obtained after the incident light is reflected and transmit a signal indicating an intensity of the reflected light to the floor board controller.

An Impact sensor for detecting strain or strain rate in a composite having one or more sensor nodes using a fracto-mechanoluminescent (FML) material, such as EuD.sub.4TEA crystals, encased in an optically transparent material such as PDMS. Optical fibers transmit light emitted by the FML material due to strain experienced by the composite. For honeycomb composites, the transparent material is disposed within cells of the honeycomb composite. A reflective material such as Mylar either surrounds the optically transparent material or lines the cell. The intensity of the light emitted by the FML material is related to the magnitude of strain or strain rate experienced by the composite as well as the distance of the FML material from the surface of the composite that receives the impact. Multiple sensor nodes disposed at different distances from the impact surface can provide a three-dimensional map of damage experienced by the composite.

The present disclosure relates to a packaging box, a device and method for detecting damage, a detection apparatus, and a storage medium, and belongs to the field of packaging technologies. The packaging box includes a plurality of packaging cardboards that are combined into the packaging box, wherein at least one packaging cardboard of the plurality of packaging cardboards includes: a surface paper; a backing paper; at least one layer of a core paper; and at least one external force detecting member, wherein the at least one layer of the core paper is disposed between the surface paper and the backing paper, and wherein the at least one external force detecting member is configured to measure a strength value of an external force when the packaging cardboard is subjected to the external force.