Hundreds of thousands of concrete bridges, buildings etc. and hundreds of billions of tons of concrete require characterization throughout the process from manufacture to pouring and curing and on throughout service life. The characterization may relate to initial concrete properties, projected concrete properties, framework removal, corrosion, failure etc. Accordingly, a variety of measurements such as water content, electrical resistivity, and half-cell corrosion potential for example would be beneficially implemented as easy to use field test equipment or embedded sensors allowing lifetime monitoring to be performed rather than discrete assessments when issues become evident.

Systems and methods for monitoring eye health. The systems and methods monitor eye health by measuring scleral strain by way of an implantable monitor, a wearable monitor configured in eyeglasses, or an external monitor using a portable tablet computing device. Certain embodiments of the strain monitor may be utilized to measure the strain on any surface to which it is attached, including, but not limited to, the skin of a patient or the surface of a structure such as a building or a bridge.

According to one embodiment, a structural health monitoring apparatus for monitoring health of structure includes a resistance measurement unit and an evaluation unit. The resistance measurement unit measures a resistance value between one terminal and another terminal of a set of two terminals. The set of two terminals is selected from a plurality of terminals provided on the electrical paths formed in the assembled body that forms frames of the structure. The evaluation unit evaluates the health of the structure by using a difference between the resistance value between terminals of the set of two terminals and a reference resistance value between the two terminals, and outputs evaluation result information.

This invention utilizes two sensing technologies in combination with or in isolation of an automated inspection vehicle to conduct inspections of internal rail flaws in steel railroad track. A vehicle equipped with X-radiation sensing is used as a secondary method to assess the deviations in magnetic fields that are sensed by a primary sensor consisting of a single or multiple magnetometers. The magnetometers sense changes in magnetic field that are correlated to the flaws inside the steel rail. The combination of technologies improves the probability to detect railroad flaws and offers the ability to accurately track and monitor flaws.

Systems and methods are described for monitoring displacement on structural elements of subsea systems such as on components of a subsea pipeline network used to transport production fluid from a subsurface wellhead to surface facilities. The described techniques sense changes in displacement using a sensing blade, for example made of crystalline material such as sapphire, that is anchored to the structural element such that it is approximately perpendicular to the direction of sensed displacement. Displacement is sensed as bending of the sensing blade using one or more instruments fabricated on the blade. Robustness of design is in part provided by additional flexible non-sensing blades mounted in parallel to the sensing blade.

The invention relates to a rotatable inspection device (10) for inspection of the integrity of an axisymmetric portion (210) of parts (200), for example a threaded tube (200). The rotatable inspection device (10) includes a measuring unit (20) configured to be rotated about the symmetry axis of the axisymmetric portion (210). The measuring unit (20) comprises: i) a radially movable measuring structure (22) comprising a defect detection sensor (30), wherein said measuring structure (22) is configured to urge the defect detection sensor (30) against said portion (210) to be inspected; ii) an electronic device (43) for processing and transmitting the signal measured by the defect detection sensor (30) along said portion (210), and iii) a measuring unit support (50) supporting the radially movable measuring structure (22). The electronic device (43) is configured to wirelessly transmit the processed signal to a remote monitoring unit (300).

There is provided a sacrificial sensor configured to be coupled with a part and provide an indication of damage in the part, wherein an electrical property of the sacrificial sensor is configured to change as the sacrificial sensor is damaged to indicate damage to the part.

The core-shell structured fiber-type strain sensor of the present disclosure, which includes a fibrous support forming a core and a multilayered shell layer formed on the fibrous support, exhibits improved strength and stiffness due to the core fiber, exhibits improved noise level due to an elastomer layer and allows manufacturing of a fiber-type sensor with improved linearity of measurement signals due to a sandwich-structured conductive layer, is advantageous in that stable strain measurement is possible without acting as a defect in a composite structure.

A printed circuit board including electronic components, a carrier equipped with a network of conductor tracks electrically connecting the electronic components and a strain gauge.

A first radio frequency scan of a plurality of electronic circuit devices fixed to a structural component of a physical structure can be initiated. Data can be received from each electronic circuit device that is scanned, the data received from each electronic circuit device indicating a first measured electrical impedance of a respective conductor connected to the electronic circuit device and an identifier assigned to the electronic circuit device. For each of the plurality of electronic circuit devices that are scanned, the received data can be stored to a first memory. The data for the electronic circuit devices forms a baseline measurement of the electronic circuit devices to which impedance data gathered from subsequent radio frequency scans of the electronic circuit devices is compared to determine whether any of the conductors of the electronic circuit devices have deformed or broken.