A system for resource monitoring and engagement, the system comprising: a server, coupled to an internet, comprising: a meter reading processor, configured to communicate with a resource monitor that is disposed within radio range of resource meters that transmit radio signals indicative of meter identifiers and current readings, where the resource monitor: determines whether the radio signals are of a fixed frequency or frequency hopping transmission protocol by scanning each of a plurality of channels for a time period and counting hits of desired meter identifiers within the each of the plurality of channels; decodes the radio signals according to a determined transmission protocol to obtain corresponding meter identifiers and readings; and transmits the corresponding meter identifiers and readings over the internet, and where the meter reading processor creates and updates a corresponding plurality of records in a resource database that indicate resource consumption of corresponding facilities; and an engagement processor, that causes an alert to be transmitted based on analyses of the resource consumption to provide notification of an unusual pattern of resource consumption.

An electric current imaging system, device, and method includes an array of vector magnetometers that senses one or more magnetic fields in three directions produced by a flow of electric current. Such a system (and devices and methods thereof) can further include a display that displays a visual reconstruction of the original electric current that produced the magnetic field(s). The disclosed embodiments image electric current flow (both magnitude and direction) without the need for rastering or relative motion between the sensors and the conductor/device being viewed. Such embodiments can be scaled to fit both large and small applications by using discreet devices or manufacturing a single, miniaturized array with MEMS technologies.

A resistive material for sensing current contains particles having an electrically insulating property and a metal body having a three-dimensional network enclosing the particles, and a ratio of the metal body to the whole of the resistive material is 30 vol % or more and 80 vol % or less.

A sensor device comprises a dielectric substrate, a busbar mechanically connected to the dielectric substrate, a cavity formed in the dielectric substrate, and a sensor chip arranged in the cavity, wherein the sensor chip is designed to detect a magnetic field induced by an electric current flowing through the busbar, wherein in an orthogonal projection of the sensor chip onto the busbar, the sensor chip at least partly overlaps the busbar.

A method of current detection includes providing a transistor arrangement which comprises a drift and drain region arranged in a semiconductor body and each connected to a drain node, a plurality of load transistor cells each having a source region integrated in a first region of the semiconductor body, a plurality of sense transistor cells each having a source region integrated in a second region of the semiconductor body, a first source node electrically connected to the source region of each of the plurality of the load transistor cells via a first source conductor, and a second source node electrically connected to the source region of each of the plurality of the sense transistor cells via a second source conductor; and detecting a first current flowing between the drain node and the first source node of the transistor arrangement, wherein detecting the first current includes measuring a second current flowing between the drain node and the second source node of the transistor arrangement.

The purpose of the present invention is to provide a device monitoring technique having little restriction even on application to an already-existing device or facilitating monitoring even when a device to be monitored is in variable speed operation or under load variation. One of the representative device monitoring devices of the present invention monitors a device system using, as a power source, an AC electric motor driven by an inverter and is provided with a torque current estimation unit and a state estimation unit. The torque current estimation unit acquires information about AC currents of at least two phases and excitation current of the AC electric motor and calculates a torque current estimated value of the AC electric motor on the basis of the AC currents and the excitation current. The state estimation unit estimates the state of the device system from information including at least one of the feature amounts extracted from the torque current estimated value.

A current sensing device including: an insulating resin substrate; a current sensing element arranged in the resin substrate; a current wire provided via an insulating layer with respect to the current sensing element to flow a current through the current sensing element; a plurality of current vias connecting the current sensing element and the current wire through the insulating layer; and a voltage sensing via connected to the current sensing element to measure a voltage drop.

An electrical distribution system includes a distributor designed to distribute an electric current in an electrical installation, the distributor being configured to be connected to a distribution grid, to at least one secondary electrical power supply source and to a plurality of the electrical loads . An electronic control device is configured to manage power supply parameters of at least some of the electrical loads to reduce the electric current consumed and/or to manage operating parameters of at least some of the secondary electrical power supply sources in order to reduce the electric current delivered by these sources, so as to comply with a current threshold dictated by a protection element and/or by the distributor .

Provided are embodiments for determining solenoid plunger position by performing a method which includes generating, by a first signal circuit, a first signal based at least in part on a pull-in current value of a current applied to a solenoid coil of a solenoid. The method further includes generating, by a second signal circuit, a second signal by applying a time delay to the first signal. The method further includes comparing, by a comparator circuit, the first signal and the second signal to determine whether a plunger of the solenoid has moved within the solenoid from a first position to a second position. The method further includes, responsive to determining that the plunger of the solenoid has moved within the solenoid from the first position to the second position, reducing the current applied to the solenoid coil of the solenoid from the pull-in current value to a hold current value.

A device which can be used for current measurement is described hereinafter. According to one exemplary embodiment, the device comprises the following: a coil carrier extending along a longitudinal axis having a base body which in a central region has a section having reduced cross-sectional area, which is smaller than the cross-sectional area outside the central region, and a magnetic field probe having a ferromagnetic sensor strip, which is fastened to the coil carrier in the section having reduced cross-sectional area, and having a sensor coil which is wound around the coil carrier in the central region so that it encloses the sensor strip. The device also comprises a film which at least partially covers the section having reduced cross-sectional area. A secondary winding is wound around the coil carrier, wherein the secondary winding is wound around the film in the section having reduced cross-sectional area.