Abstract: A capacitive voltage sensor includes an electrode extending along a longitudinal axis, a tubular portion including a layer of electrically insulating material, a layer of electrically conductive material positioned radially inward of the layer of electrically insulating material in a direction toward the longitudinal axis, and an outer shield configured as a latticelike network and positioned radially outward of the layer of electrically insulating material in a direction away from the longitudinal axis. The layer of electrically conductive material, the layer of electrically insulating material, and the outer shield each surround and is spaced in a direction radially outward from the longitudinal axis and from a portion of the electrode. A mass of dielectric insulating material at least partially encapsulating the electrode and the tubular portion and fills through holes formed in the latticelike network of the outer shield.

Abstract: A capacitive voltage sensor assembly includes an electrode extending along a longitudinal axis, the electrode having a first end and a second end opposite the first end, and a tubular shield surrounding and spaced radially outward from a portion of the electrode. The tubular shield includes a plurality of through holes. The sensor assembly also includes a circular sensor element positioned radially inward of the tubular shield and including a first layer made of electrically conductive material and a second layer made of electrically insulating material. The circular sensor element includes a plurality of circumferentially spaced gaps.

Abstract: A construction system regarding a capacitive voltage sensor, comprises a source electrode (110/210/310/410), a tubular body (120/220/320/420), and a mass of dielectric insulating material (140/240/340/440).

Abstract: A constructive system regarding a capacitance electric voltage sensor comprises a source electrode (110, 210), a shielding tubular body (120, 220), an electric field sensor (130, 230) and a mass of dielectric insulating material (140, 240). The electric field sensor (130, 230) comprises at least one first inner sheet (131, 231) and a second outer sheet (132, 232) superimposed and joined together, wherein said first inner sheet (131, 231) is made by means of a conductive metal material, wherein said second outer sheet (132, 232) is made by means of an electrically insulating material, and wherein said second outer sheet (132, 232) made of insulating material is constrained with respect to the inner face (124, 224) of the shielding tubular element (120, 220).

Abstract: A construction system regarding a capacitive voltage sensor, comprises a source electrode (110/210/310/410), a tubular body (120/220/320/420), and a mass of dielectric insulating material (140/240/340/440).

Abstract: A kit for joining opposing ends of two medium-voltage (between about 3.3 kV and about 52 kV) electrical power distribution cables, comprising an electrically-conductive connector for connecting the conductors of the cables, an electrically-insulating surround material for enveloping the connector, a partial discharge detector, comprising a generally cylindrical, electrically-conductive sheath around the insulating surround, from which an electrically-conductive element extends in an axial direction along the length of at least one of the cables, an outer protective tube for surrounding the remainder of the kit, wherein the conductive element is sufficiently long to project out of the protective tube. A partial discharge detector and a medium voltage cable run are also described.

Abstract: A current or voltage sensor for use with a busbar has a support body having a proximal end juxtaposed with the busbar and a distal end spaced therefrom and a U-shaped conducting bar in the proximal end and having a pair of arms having free ends transversely engaging the busbar. A Rogowski coil in the proximal end is juxtaposed with the U-shaped conducting bar. A grounded screening element at the distal end is conductive and forms a chamber open toward the U-shape conducting bar. A source electrode has a proximal end engaging the U-shaped conducting bar outside the first chamber and a distal end in the chamber. An electrical field sensor in the first chamber is juxtaposed with the distal end of the source electrode.

Abstract: Methods and apparatus for noninvasively estimating a blood pressure are provided. A target interval is determined from a diastolic signal such that the target interval includes an S2 component. The S2 component is extracted from the diastolic signal using the target interval and is analyzed in the target interval to obtain a number of oscillations in the S2 component. A predetermined relationship between the number of oscillations in the S2 component and blood pressure is used to generate a blood pressure estimate.

Abstract: Methods and apparatus for noninvasively determining a sound pressure of a source that transmits a generally periodic acoustic signal including at least one signal component to a surface of a body are provided. The signal component at the surface of the body is received and an initial phase-inverted signal component is estimated responsive to the received signal component. The phase-inverted signal component, advanced by a predetermined time increment, is transmitted toward the source via the surface. The predetermined time increment corresponds to a distance of the signal component within the body. At least one feature of the transmitted signal component is adjusted until a further received signal approximates a minimum value. The adjusted signal component corresponds to the signal component at the distance. The apparatus determines the phase-inverted signal component that corresponds to the signal component being proximate to the source.

Abstract: A presentable voltage sensor includes an electrode faced by an electric field probe and connected to a voltage source; a screening conductive shell wrapping the probe and connected to a reference potential; a dielectric material housed within the shell and interposed between the probe and the electrode; a conditioning circuit connected to an exit of the sensor and having a resistor of resistance Rm interposed between the probe and a second reference potential; and an integrator circuit formed from an RC network and having a resistor of resistance Ri, a capacitor of capacitance Ci, and a loss factor which, at a frequency of interest, is of an order of 10?4.

Abstract: A capacitive sensor for detecting an electrical field generated by a live conductor comprises a source electrode (10), a screen element (20) and an electrical field sensor (30). Said source electrode (10) has a proximal portion (11) connected to the conductor (A) and a distal portion (12) placed inside the screen element (20). The electrical field sensor (30) is placed inside said screen element (20), and faces and is spaced apart from the distal portion (12) of said source electrode (10), in order to detect the electrical field emitted by said source electrode (10).

Abstract: A construction system for a capacitive sensor comprises a source electrode (210), a screening element (220) with partition (221) which forms a first and a second screened chamber (220.a, 220.b), a field sensor (230), a circuit (250), a spacing member (260) with a through-duct, and a screw (270). The partition (221) is provided with a hole (224) and said spacing member (260) is positioned inside the first chamber (220.a) with the axis (260.y) of the duct arranged coaxial with the axis (224-y) of said hole (224). The same spacing member (260) is positioned between the proximal face (223) of the partition (221) and the distal face (232) of the field sensor (230) and said field sensor (230) is provided with a threaded hole (233). The head (271) of the screw (270) is arranged inside the second chamber (220.

Abstract: An apparatus for sensing impact of a body on a strip located on a support, characterized by comprising: a strip (2) of material presenting piezoelectric characteristics, applicable to a support in the region to be monitored; at least one continuous tape (4) made of conductive material and associated with said strip (2) in a manner parallel to it; a device (6) connected to said tape to condition the electric signal generated by the impact of said body on said strip (2); a device (12) for sensing said signal; a device (18) for indicating the sensed signal.

Abstract: Methods and apparatus for noninvasively estimating a blood pressure are provided. A bandpass filter is applied to a second heart sound (S2) component to generate a filtered S2 component. The bandpass filter has a lower cutoff frequency greater than a maximum frequency of the S2 component. The maximum frequency of the S2 component is estimated using the filtered S2 component, a predetermined relationship is applied between the estimated maximum frequency and blood pressure to generate a blood pressure estimate and the blood pressure estimate is displayed.

Abstract: A construction system for a current and/or voltage sensor (100), intended for use in combination with a busbar (B), extends along a longitudinal axis (Y), thus forming a proximal portion and a distal portion with respect to said busbar (B), and said sensor (100) comprises a solid body (110) of dielectric material intended to contain and/or incorporate electrical members, and more specifically a U-shaped conducting bar (120) extending longitudinally along its longitudinal axis (U-120) and one or more sensors (130/250/360/450/510-520/610) are placed in the proximity of said U-shaped conducting bar (120).

Abstract: A construction system for a capacitive sensor comprises a source electrode (210), a screening element (220) with partition (221) which forms a first and a second screened chamber (220.a, 220.b), a field sensor (230), a circuit (250), a spacing member (260) with a through-duct, and a screw (270). The partition (221) is provided with a hole (224) and said spacing member (260) is positioned inside the first chamber (220.a) with the axis (260.y) of the duct arranged coaxial with the axis (224-y) of said hole (224). The same spacing member (260) is positioned between the proximal face (223) of the partition (221) and the distal face (232) of the field sensor (230) and said field sensor (230) is provided with a threaded hole (233). The head (271) of the screw (270) is arranged inside the second chamber (220.

Abstract: A capacitive sensor for detecting an electrical field generated by a live conductor comprises a source electrode (10), a screen element (20) and an electrical field sensor (30). Said source electrode (10) has a proximal portion (11) connected to the conductor (A) and a distal portion (12) placed inside the screen element (20). The electrical field sensor (30) is placed inside said screen element (20), and faces and is spaced apart from the distal portion (12) of said source electrode (10), in order to detect the electrical field emitted by said source electrode (10).

Abstract: A presettable voltage sensor includes an electrode faced by an electric field probe and connected to a voltage source; a screening conductive shell wrapping the probe and connected to a reference potential; a dielectric material housed within the shell and interposed between the probe and the electrode; a conditioning circuit connected to an exit of the sensor and having a resistor of resistance Rm interposed between the probe and a second reference potential; and an integrator circuit formed from an RC network and having a resistor of resistance Ri, a capacitor of capacitance Ci, and a loss factor which, at a frequency of interest, is of an order of 10?4.

Abstract: Methods and apparatus for noninvasively estimating a blood pressure are provided. A pulmonic (P) component extracted from a second heart sound (S2) signal is analyzed to obtain a number of oscillations in the P component. A predetermined relationship between the number of oscillations and PAP is used to generate a blood pressure estimate. A PCG sensor including a mechanical filter for receiving heart sounds from a chest wall is also provided. The pressure of the PCG sensor on the chest wall is adjustable.

Abstract: An apparatus for sensing impact of a body on a strip located on a support, characterised by comprising: a strip (2) of material presenting piezoelectric characteristics, applicable to a support in the region to be monitored; at least one continuous tape (4) made of conductive material and associated with said strip (2) in a manner parallel to it; a device (6) connected to said tape to condition the electric signal generated by the impact of said body on said strip (2); a device (12) for sensing said signal; a device (18) for indicating the sensed signal.