Abstract: A system configured to monitor and characterize motions of a user is disclosed herein. The system can include a wearable article including a tubular body comprising a resilient material, a flexible circuit including a fluid-phase conductor configured to generate a first signal, and an inertial measurement unit (“IMU”) coupled to the resilient material, wherein the IMU is configured to generate a second signal. The system can further include a processor communicably coupled to the flexible circuit and the IMU.

Abstract: Devices, systems, and methods for making and using highly sustainable circuit assemblies are disclosed herein. In various aspects, the highly sustainable circuit assembly includes a substrate layer; and a pattern of contact points supported by the substrate layer. The pattern of contact points can be configured to correspond to at least one terminal of an electrical component. The pattern of contact points can include a deformable conductive material. The deformable conductive material can be a non-hazardous, readily reclaimable, readily recyclable material.

Abstract: A circuit assembly may include a substrate and a pattern of contact points formed from deformable conductive material supported by the substrate. The assembly may further include an electric component supported by the substrate and having terminals arranged in a pattern corresponding to the pattern of contacts points. The one or more of the terminals of the electric component may contact one or more of the corresponding contact points to form one or more electrical connections between the electric component and the contact points.

Abstract: A system for imaging material, typically in an underground scenario, comprising of a plurality of conductive electrodes supported on a conductive substrate positionable in an environment to be imaged, a signal generator connected to at least two of the electrodes, and a signal detector connected to at least two of the electrodes, and wherein an impedance compensator is arranged between each electrode and its substrate to counter parasitic impedance between the two. Typically the impedance compensator may be arranged to act as a negative capacitance, which may be approximately equal to any capacitance between the electrode and the substrate. An electrode may be a drive electrode coupled to a signal generator, or a detector electrode coupled to a detector, or may be reconfigurable to act as either one.

Abstract: A sensor system for the measurement of a physical parameter, such as temperature or pressure comprises a first, fixed module (5), and a second module (20) positionable proximate to the first. The first module has a measurement coil (6) and a reference coil (7), where the measurement coil forms part of an electrical circuit that is subject to variation by the physical parameter, and the reference coil forms part of a circuit not subject to the physical parameter being measured. The second module has a pair of reading coils (22, 23), each arranged to couple to respective measurement and reference coils, where the reading coils are connectable to signal generation and measurement equipment, and the system is arranged to measure electrical characteristics of the measurement and reference coils via the coupling. It has particular utility in harsh environments such as in wells, where the first module may be fixed, and the second module may be lowered adjacent the first.

Abstract: A sensor system for the measurement of a physical parameter, such as temperature or pressure comprises a first, fixed module (5), and a second module (20) positionable proximate to the first. The first module has a measurement coil (6) and a reference coil (7), where the measurement coil forms part of an electrical circuit that is subject to variation by the physical parameter, and the reference coil forms part of a circuit not subject to the physical parameter being measured. The second module has a pair of reading coils (22, 23), each arranged to couple to respective measurement and reference coils, where the reading coils are connectable to signal generation and measurement equipment, and the system is arranged to measure electrical characteristics of the measurement and reference coils via the coupling. It has particular utility in harsh environments such as in wells, where the first module may be fixed, and the second module may be lowered adjacent the first.

Abstract: Apparatus for the wireless transmission of data, and preferably also of power, across a space between a length of production tubing and a surrounding casing in a petrochemical well, includes a pair of inductively-coupled coils, a first of which is located on the exterior of the production tubing generally coaxially therewith, and the second of which is located on the interior of the casing generally coaxially therewith. This may be used in particular as part of a system for transmitting power and data to/from a sensor monitoring the pressure and/or other environmental conditions within the “B” annulus B of a sub-sea well.

Abstract: Apparatus for the wireless transmission of data, and preferably also of power, across a space between a length of production tubing and a surrounding casing in a petrochemical well, includes a pair of inductively-coupled coils, a first of which is located on the exterior of the production tubing generally coaxially therewith, and the second of which is located on the interior of the casing generally coaxially therewith. This may be used in particular as part of a system for transmitting power and data to/from a sensor monitoring the pressure and/or other environmental conditions within the “B” annulus B of a sub-sea well.

Abstract: Reader apparatus for receiving data from a transponder in the body of a patient, for example a femoral nail. The apparatus includes an antenna which can be varied in size and shape to fit patients, the size and shape of whose bodies vary significantly. A variable impedance unit is included to maximise power matching between the antenna and a reader unit for a given antenna configuration.