Abstract: A method for detecting components of dielectric materials is disclosed. The method includes use of a sensor to obtain at least one of a strain-dielectric coefficient data series at multiple frequencies or a stress-dielectric coefficient data series at multiple frequencies and using a processor to analyze resulting data, when a strain field or a stress field is known. The method also includes use of a sensor to obtain rheo-dielectric coefficient data at single frequency or data series at multiple frequencies and using a processor to analyze resulting data, when shear rate is known. The resulting data is used to perform material process or operation monitoring and control, quality examination, and characterization. Systems for detecting components of dielectric materials and for dielectrostriction measurement are also disclosed.

Abstract: A photo-acoustic gas sensor may include a detector component. The detector component includes a package that defines a reference volume. The reference volume houses a reference gas. The detector component includes a pressure sensing element to measure an amount of pressure in the reference volume. The amount of pressure in the reference volume depends on absorption of a wavelength of light by the reference gas in the reference volume. A sensitivity of the pressure sensing element when measuring the amount of pressure in the reference volume depends on a length of a reference path associated with the reference volume. The detector component includes a reference path structure that causes the length of the reference path to be less than or equal to 0.5 millimeters.

Abstract: A microelectromechanical transducer includes a semiconductor body having first and second surfaces opposite to one another. A plurality of trenches extend in the semiconductor body from the first surface towards the second surface, including a first pair of trenches having a respective main direction of extension along a first axis, and a second pair of trenches having a respective main direction of extension along a second axis orthogonal to the first axis. A first piezoresistive sensor and a second piezoresistive sensor extend at the first surface of the semiconductor body respectively arranged between the first and second pair of trenches. The first piezoresistive sensor, the second piezoresistive sensor and the plurality of trenches form an active region. A first structural body is mechanically coupled to the first surface of the semiconductor body to form a first sealed cavity which encloses the active region.

Abstract: A precision detection device for a force standard machine includes a first hydraulic cylinder, a pipeline and a force loading device. A liquid medium is disposed in, the first hydraulic cylinder, and a liquid level area of the liquid medium is a known Value. The pipeline is a hollow tubular structure, and a first end of the pipeline is communicated with the liquid medium in the first hydraulic cylinder. The force loading device acts on the liquid medium, in the first hydraulic cylinder to produce a pressure increment or a pressure intensity increment on the, liquid medium. A force value comparison machine and a precision detection method for a force standard machine are also provided.

Abstract: An ultrasonic testing device and method for the connection force of interference fit. The motion control module can realize accurate positioning for the interference fit part and accurate control for motion in the circumferential direction and the axial direction; scanning increments of the circumferential direction and the axial direction are set, and the motion control module drives the interference fit part to perform circumferential and axial point scanning until the testing of the whole matching surface is completed. The ultrasonic signal measured by the point focusing water immersion probe is transmitted to a PC through a control loop in the testing process. Then the stress distribution of the matching surface is obtained through the relationship between the ultrasonic signal and contact stress Finally, the size of the connection force is calculated according to the static friction coefficient.

Abstract: According to one implementation, a damage detection system includes: a physical quantity detection unit, a flight condition changing part and a damage detection part. The physical quantity detection unit detects a physical quantity of a structural object composing an aircraft during a flight of the aircraft. The flight condition changing part changes at least one flight condition of the aircraft to at least one specific flight condition when the physical quantity of the structural object has been detected by the physical quantity detection unit. The damage detection part determines whether a damage arose in the structural object, based on a physical quantity which has been detected, from the structural object of the aircraft flying with the at least one specific flight condition, by the physical quantity detection unit.

Abstract: A load sensor is designed to be mounted on a continuous force-applying medium such as a cable so as to deform according to the force transmitted through the medium. The sensor includes a body having a longitudinal through-passage for the medium and is mechanically secured to the medium only at the opposite ends of the body. A lateral hole provides a strain concentration area with zones that are instrumented with strain gages. The sensor body can be enclosed to provide support for a wrap-around lead carrier.

Abstract: An operation lever includes: a pair of rods disposed at point-symmetrical positions with respect to an operation axis; magnets disposed on the respective rods; and a pair of magnetic sensors disposed at line-symmetrical positions with respect to a second straight line perpendicular to a first straight line connecting centers of one of the rods and the other rod, on a plane perpendicular to the operation axis.

Abstract: Example aspects of a pressure monitoring system for a wet barrel hydrant, a pressure monitoring and leak detection system for a wet barrel hydrant, and a method for using a pressure monitoring and leak detection system are disclosed. The pressure monitoring system for a wet barrel hydrant can comprise a pressure sensor assembly comprising a pressure sensor and a connector, the pressure sensor configured to measure the pressure of a fluid received in the wet barrel hydrant, the connector configured to attach the pressure monitoring system to the wet barrel hydrant; a mounting flange coupled to the pressure sensor assembly; a main PCB configured to process pressure data measured by the pressure sensor; an antenna configured to send a signal representative of the pressure data; and a housing coupled to the mounting flange, the housing enclosing the processor and the antenna.

Abstract: An improved fitting assembly for analytical devices is provided. The fitting assembly includes a tube securable to a fitting component via rear and front ferrules and a nut. The fitting component includes a body having a cavity for receiving the tube and ferrules. The body also includes a channel connecting the cavity to a leak chamber defined in a space between the tube, the fitting component and the inner sidewall of the nut body, the leak chamber being in fluid communication with the exterior of the nut body via the channel in the nut body. Sealing elements are provided between the tube and nut for encouraging leaks to flow through the leak path. A method for detecting leaks in the fitting assembly is also provided.

Abstract: An electrode pair that forms a pressure-sensitive capacitance Cx in the central portion of a diaphragm is called a first electrode pair (pressure-sensing electrode pair), and another electrode pair that forms a reference capacitance Cr in the circumferential portion of the diaphragm is called a second electrode pair (reference electrode pair). The ratio ?Cx/?Cr of a change ?Cx in the pressure-sensitive capacitance Cx, which is obtained from the pressure-sensing electrode pair at the time of evacuation, to a change ?Cr in the reference capacitance Cr, which is obtained from the reference electrode pair at the time of evacuation, is calculated as an index for malfunction detection ?. Then, the index for malfunction detection ? thus calculated is compared with the reference value ?ref, which represents the index observed during normal operation, and whether deformation due to a cause other than pressure has been generated in the diaphragm is determined.

Abstract: A pressure sensing glove for measuring a force includes a sensor having a pair of contact layers and a pair of diffusion layers disposed between the pair of contact layers. The pair of contact layers distributes a force received along outer surfaces of the sensor across the pair of diffusion layers. The sensor further includes a sensing layer disposed between the pair of diffusion layers. The pair of diffusion layers normalizes the force received from the pair of contact layers across the sensing layer. The sensing layer receives the force at a plurality of locations across a surface area of the sensing layer to determine a resultant pressure applied to the sensor.

Abstract: A method and apparatus for calculating line sag in a span of a conductor is provided. The method includes using a portable smart device having one or more accelerometers and running a line sag application on the processing device. The line sag application enables acceleration data of return waves generated on the conductor to be collected using the smart device and to be plotted as a function of time for display on the smart device. The method further includes placement of time markers on the plotted data displayed on the smart device to determine elapsed time and calculating line sag using the elapsed time.

Abstract: A multi-axis force sensor including a central portion, an outer ring portion, and at least one sensing portion disposed along an axial direction of an axis is provided. The sensing portion includes a first and a second elements connected with each other, and at least one first and at least one second strain gauges. A first end surface of the first element is connected to the central portion, and a second end surface of the second element is connected to the outer ring portion. A normal vector of the first end surface is parallel to the axis and the axis passes through a centroid of the first end surface. When the first end surface is subjected to an axial force, a first strain of a first sensing region of the first element in the axial direction is smaller than a second strain of a second sensing region of the second element in the axial direction.

Abstract: A pressure sensor comprises: a first electrode layer; a second electrode layer; and an intermediate layer disposed between the first electrode layer and the second electrode layer, wherein the intermediate layer changes in resistance, depending on a change in at least one of a thickness or a volume thereof. In addition, the intermediate layer comprises: a foam having porous regions dispersed in a non-porous region thereof; and a conductive material being dispersed in the foam and being more conductive than the foam.

Abstract: A pressure sensing element may include: an intermediate layer having a structure in which at least two functional layers are stacked on each other; a first electrode layer including a plurality of first electrode patterns; and a second electrode layer to overlap the first electrode layer with the intermediate layer between the first and second electrode layers. Among the two functional layers, the first functional layer has a thickness linearly varying in a first pressure section, and the second functional layer has a thickness linearly varying in a second pressure section. The maximum pressure in the first pressure section is lower than that in the second pressure section, and the minimum pressure in the second pressure section is included in the first pressure section.

Abstract: A sensor system includes a substrate with a reference plane, a plurality of kinesthetic-sense sensors disposed on the substrate, each of the plurality of kinesthetic-sense sensors being configured to output signals of three axial directions corresponding to an orthogonal-axis direction orthogonal to the reference plane and two axial directions parallel to the reference plane, respectively, according to an external force from an object received at a force receiving part, a control unit configured to determine whether or not a value of each of the signals is larger than a predetermined threshold, and calculate a pressing force in the orthogonal-axis direction or a moment around the orthogonal axis received from the object based on a result of the determination, and an output unit configured to output a result of the calculation.

Abstract: Aspects described herein provide structures for a force sensor, and force sensors using such structures, which are compact and easy to manufacture, for example by 3D printing. In particular the structures comprise a pair of stacked ring sensor elements, the ring sensor elements in turn being formed by upper and lower ring elements joined together at points around the circumference thereof by resiliently mounted connection bars. The connection bars may extend in the same plane as the rings, in which case sensitivity to torque about the axis of the rings is much reduced, such that a five-axis sensor is effectively obtained, or the connection bars may extend obliquely between the upper and lower rings of each sensor element, such that they have a directional component in the direction of the axis of the rings (the rings of each element being co-axially stacked).

Abstract: A load cell for installing in a weighing foot is described with a spring body, a measuring transducer for generating an output signal corresponding to a weight acting on the force introduction element, and an external interface connected to the measuring transducer. The spring body can have an outer support ring, a force introduction element, and an annular deformation section, the support ring and the force introduction element being connected with the annular deformation section. The external interface can output the output signal generated by the measuring transducer to an external device. The external interface for the external output of the output signal is provided at the force introduction element.

Abstract: A bearing system for rock mechanics test under high temperature and high pressure multi-field coupling includes a force sensor lifting seat and a jack. The force sensor lifting seat includes a connecting disk connected with the jack, a support disk, and an operation channel. A groove dented downwards is arranged on the connecting disk, the support disk is disposed in the groove and freely propped upon the connecting disk; through holes of the connecting disk and the support disk form a control operation channel; and a limiting device is arranged for preventing an MTS triaxial force sensor from disengaging from the support disk. A bolt hole of the force sensor can be aligned with a mounting hole on a solid steel column by rotating the connecting disk for convenient and accurate bolting.