Systems and methods are provided for measuring electrical parameters in an insulated conductor without requiring a galvanic connection. A non-contact, electrical parameter sensor probe may be operative to measure both current and voltage in an insulated conductor. The sensor probe includes a body, a Rogowski coil coupled to the body, and a non-contact voltage sensor coupled to the body or the Rogowski coil. The size of the loop of the Rogowski coil is selectively adjustable, such that the loop may be tightened around the conductor under test until the conductor is positioned adjacent a portion of the body or Rogowski coil that includes the non-contact voltage sensor. Measured electrical parameters may be provided to a user, e.g., via a display, or may be transmitted to one or more external systems via a suitable wired or wireless connection.

A security method for monitoring an optical module and a three-dimensional sensor using the same apply electromagnetic induction to the three-dimensional sensor to monitor the optical module and a light source module. Two inductive coils corresponding to each other are arranged on the light source module and the optical module. An alternative current is inputted to one of the inductive coils and another of the inductive coils generates an inductive current. The value of the inductive current is continuously detected. When the value of the inductive current varies, the abnormality of the optical module is determined to shut down the light source module, thereby completing the security mechanism of the three-dimensional sensor.

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). The tubular body (120/220/320/420) comprises: a self-supporting tubular laminar element (123/223/323/423) made of insulating material, in which the self-supporting tubular laminar element (123/223/323/423) is stretched to form the support structure for said tubular body (120/220/320/420); a first thin layer (124/224/324/424) of conductive material applied to the outer surface of said self-supporting tubular laminar element (123/223/323/423) wherein said first thin layer (124/224/324/424) of conductive material is intended to perform the function of an electric screen; a second thin layer (125/225/325/425) of conductive material applied to the inner surface of said self-supporting tubular laminar element (123/223/323/423), wherein said second thin layer (125/225/325/425) of conductive material is designed to form an armature for a capacitive coupling.

A power distribution monitoring system is provided that can include a number of features. The system can include a plurality of power line sensing devices configured to attach to individual conductors on a power grid distribution network. The sensing devices can be configured to measure and monitor, among other things, current values and waveforms, phase voltage, conductor current, phase-to-phase voltage, conductor temperatures, ambient temperatures, vibration, wind speed and monitoring device system diagnostics. Methods of installing and protecting the system are also discussed.

Devices, systems, and methods for measurement of parameters of electric power transmission lines can improve electric power usage, while wireless circuitry can provide communication from field-located devices. Connection to draw electrical power from the transmission line can be distinct from connection to sense line parameters.

A device for measuring electric currents includes multiple current sensors of Rogowski type, each suitable for measuring an electric current flowing through an electrical conductor, these current sensors being in adjacent pairs and each including coils for measuring the current and a central aperture for receiving the corresponding electrical conductor. Each current sensor includes two of the coils, which coils are positioned in parallel and facing one another on opposite edges of the central aperture and two ferromagnetic bars extending between ends of the coils, perpendicularly to a longitudinal axis of the coils.

A system measures wireless power transfer between a transmitter and a receiver. The system includes a sensor circuit including a sensor. The sensor is configured and positioned to generate sensor data indicative of a field. The field is generated in connection with the wireless power transfer. The system further includes a processor coupled to the sensor circuit and configured to determine a power measurement based on the sensor data. The processor is further configured to determine misalignment of the transmitter or the receiver. The processor is also configured to correct an estimate of the power measurement based on the misalignment.

A dynamic real time transmission line monitor, a dynamic real time transmission line monitoring system, and a method of dynamic real time transmission line monitoring are provided. A dynamic real time transmission line monitor includes a housing installable on a transmission line, the housing including a base portion and a cover portion; at least one sensor configured to sense in real time at least one of a temperature, a position, a current, an acceleration, a vibration, a tilt, a roll, or a distance to a nearest object, the at least one sensor including a radar sensor configured to sense a distance to a nearest object; and an antenna in the cavity of the housing and configured to transmit a signal including information sensed by the at least one sensor away from the monitor in real time.

A high voltage electric power line monitor includes a current sensor, a voltage sensor, an energy harvesting power supply, and a communication device. The monitor is supported by an overhead power line support structure, such an insulator housing a sectionalizing switch. The current sensor coil and the energy harvesting coils are positioned transverse to the power line with the power lane passing through the coils. A foil patch voltage sensor and a communications antenna are carried on an electronics board positioned parallel to the monitored power line, typically below the current sensor. Both the current sensor and the voltage sensor are positioned adjacent to, but spaced apart from, the monitored power line creating an air gap between the monitor and the power line. The sensors are housed within a Faraday cage to shield the current sensor from electromagnetic contamination.

A high voltage line post sensor for a high voltage power distribution system having a high voltage power transmission line for transmitting electrical power at a high voltage includes a voltage line sensor. The voltage line sensor includes a high voltage high resistance circuit including a first high voltage high resistance resistor coupled to the high voltage power transmission line and a second high voltage high resistance resistor coupled to the high voltage power transmission line in parallel to the first resistor; and a low voltage low resistance circuit coupled in series between the high voltage high resistance circuit and a reference voltage. The line post sensor also includes a body surrounding and encasing the high voltage high resistance circuit and the low voltage low resistance circuit.