Abstract:
An apparatus comprising: a first sensor comprising a sensing material that is sensitive to a first parameter and a second parameter, wherein sensitivity to the first parameter changes sensitivity to the second parameter. The sensitivity of the first sensor to one of the first and the second parameters may be controlled by maintaining, as a constant, the other of the first and the second parameters. The apparatus may comprise a second sensor sensitive to at least one of the first parameter and the second parameter. The first parameter may be deformation and the second parameter may be a concentration of a gaseous analyte such as, for example, humidity. The second sensor may comprise the sensing material that is sensitive to the first parameter and the second parameter.
Abstract:
The invention relates to silk or other materials formed to have predetermined contraction/relaxation characteristics, wherein the contraction/relaxation characteristics are initiated by exposure thereof to predetermined humidity characteristics in the adjacent atmosphere. The materials may comprise a single silk fiber, a bundle of fibers of a predetermined size or diameter, a meshwork of fibers forming a predetermined configuration such as one or more sheets, bundles or other bodies. In this manner, the material can be scaled across a size range of any desired magnitude to produce predetermined force and/or displacement characteristics in association therewith.
Abstract:
The invention relates to silk or other materials formed to have predetermined contraction/relaxation characteristics, wherein the contraction/relaxation characteristics are initiated by exposure thereof to predetermined humidity characteristics in the adjacent atmosphere. The materials may comprise a single silk fiber, a bundle of fibers of a predetermined size or diameter, a meshwork of fibers forming a predetermined configuration such as one or more sheets, bundles or other bodies. In this manner, the material can be scaled across a size range of any desired magnitude to produce predetermined force and/or displacement characteristics in association therewith.
Abstract:
Describes systems and methods for measuring the moisture and sediment content of a petroleum sample. In one embodiment, a sample to be tested is collected in a field bottle (301). The sample from the field bottle is then transferred from the field bottle, and into and through a measurement column containing a high-uptake gelling agent (305), such as a superabsorbent polymer. The sample's moisture is determined by measuring the expanded volume of the high-uptake gelling agent (309, 311). The measurement column also contains a sediment measurement section having a sediment filter and a sight glass with graduations to measure the sediment content of the sample (313).
Abstract:
The invention relates to a method for determining the swelling behavior and the swelling kinetics of super absorbent materials (9) such as polymer gels, whereby a defined volume of dry super absorbent materials (9) is introduced into a measuring vessel (7), and a pressure force (12) is exerted onto the super absorbent material (9) by means of an element (4) that can be displaced inside the measuring vessel (7). The expansion of the super absorbent material (9) inside the chamber (14) is continuously detected by means of a non-contact detection of the change in height of a tube (4), which delimits the chamber (14), is guided inside a measuring vessel (7), and which is provided with a height marking (6).
Abstract:
A humidity indicator comprises a transparent tube (1) containing a fibrous strip (3) impregnated with a hygroscopic salt and folded in its dry state into a zig-zag shape, the tube (1) being closed by a cap (6) until use. When used for measuring the relative humidity in a concrete floor (8) with a view to judging its suitability for glueing a floor covering (not shown) to it, a hole (9) is bored in the floor (8), after which the indicator, whose cap (6) has been removed immediately before, is inserted in the top of the hole (9), sealing lips (7a) ensuring an airtight and vapour-tight joint. When equilibrium between the space inside the tube (1) and the hole (9) has been established, and if the relative humidity in these spaces is equal to or greater than the liquefaction value for the hygroscopic substance in the strip (3), the water absorbed by the hygroscopic substance will soften the adhesive holding the paper fibres together, and under its own weight the strip will straighten out at least partly, indicating to an observer that the humidity is above some predetermined value.
Abstract:
Embodiments of the present disclosure provide techniques and configurations for an apparatus to reduce sensor power consumption, in particular, through predictive data measurements by one or more sensors, in one instance, the apparatus may include one or more sensors and a sensor management module coupled with the sensors and configured to cause the sensors to initiate measurements of data indicative of a process in a first data measurement mode, determine a pattern of events comprising the process based on a portion of the measurements collected by the sensors in the first data measurement mode over a time period, and initiate measurements of the data by the one or more sensors in a second data measurement mode. The second data measurement mode may be based on the pattern of events comprising the process. The pattern may indicate a prediction of appearance of events in the process. Other embodiments may be described and/or claimed.
Abstract:
A progressive, or graded, passive moisture detector is configured to provide an indication of the amount of moisture to which a moisture- sensitive substrate has been exposed, a duration of time that a moisture-sensitive substrate has been exposed to moisture or the effectiveness of one or more protective coatings at preventing moisture-sensitive components from being exposed to moisture. A progressive passive moisture detector includes a plurality of different passive moisture detectors with different properties. The passive moisture detectors may be arranged in a manner (e.g., a sequence, etc.) that correlates to information the progressive passive moisture detector is intended to provide.
Abstract:
A corrosivity associated with each of multiple locations near, on, or within a structure exposed to an environment that can corrode the structure is determined. Each of multiple sensor nodes is mounted at a corresponding one of the locations and measures environmental sensor information using one or more environmental sensors and corrosion sensor information using one or more corrosion sensors. The environmental sensor information is processed to obtain for the sensing node a first atmospheric corrosivity category value in accordance with a corrosivity classification system, and the corrosion sensor information is processed to obtain a second atmospheric corrosivity category value for the sensing node in accordance with the corrosivity classification system. One or more of the first and second atmospheric corrosivity category values is provided for use in determining a corrosion classification value for each of the locations.