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9030189 Quantum dot photo-field-effect transistor  
Photo-field-effect transistor devices and associated methods are disclosed in which a photogate, consisting of a quantum dot sensitizing layer, transfers photoelectrons to a semiconductor channel...
9024616 Signaling circuit and method to detect zone status  
A bi-directional current limiter may be configured to receive an AC signal and bi-directionally limit the loop current to a predetermined current value. A first and second zone may be configured...
9000753 Smart meter voltage and current sensing using optically coupled isolators  
A transformer-less method and system for voltage and current sensing using voltage drops across resistors is disclosed. Using optically coupled isolators, the sensed voltages in the high voltage...
8988061 Nanomechanical electric and electromagnetic field sensor  
The present invention provides a system for detecting and analyzing at least one of an electric field and an electromagnetic field. The system includes a micro/nanomechanical oscillator which...
8957667 Electric current measuring apparatus  
An electric measuring apparatus is constructed in such a way as to include a signal processing circuit equipped with at least a polarized light separating unit, Faraday rotators, a light source, a...
8947072 Conductor to which current detection head is fixed, and current detection head used in manufacture of same  
Provided is a technique for mass-producing a conductor to which is fixed a current detection head that detects the value of current flowing in the conductor, and in which the relationship between...
8933686 Single-phase optical current transformer  
An installation base is secured to part of outer peripheral surface of cylindrical container 1 which has electric conductor 2 arranged thereinside, and a case which stores a Faraday-effect element...
8933687 Portable self powered line mountable device for measuring and transmitting solar radiation  
A device for attaching to an electric power line conductor includes a housing with an opening for accepting the power line conductor. The housing is configured to be grounded to the power line...
8922194 Master-slave fiber optic current sensors for differential protection schemes  
A master-slave current sensor system for measuring, for example, differential current on a transmission line is described. The slave current sensor can be periodically recalibrated (or have a...
8890508 Adaptive filters for fiber optic sensors  
Systems and methods related to optical current and voltage sensors and, more particularly, to filters for use in such sensors. A fiber optic current sensor comprising: a light source; a...
8860424 Apparatus and method for highly accelerated life testing of solar cells  
An apparatus is provided for highly accelerated life testing (HALT) of multi-junction solar cells according to a method that utilizes a high vacuum chamber, as well as lenses and windows...
8841905 System and method for fiber magneto-optic detection  
A system and method for fiber magneto-optic detection are provided, which belongs to the optical application field. The system comprises: a reference device (300) for generating a reference...
8835827 Current integrator with wide dynamic range  
A determination circuit for measuring a current is reset each time the integration value of the current exceeds a threshold until expiration of a predefined maximum integration time. This...
8829886 Systems and methods for defect detection using exoelectrons  
An defect detection system includes an exoemission sensor having a conductive layer and an insulating layer. The exoemission sensor is mountable to a material of interest and configured to receive...
8829938 Measuring method and device for characterizing a semiconductor component  
A measuring method and device for characterizing a semiconductor component (1) having a pn junction and a measuring surface, which has a contacting subarea, covered by a metallization. The method...
8829890 Optical voltage sensor  
A polarizing optical system (15, 16) is disposed perpendicular to an optical axis of incoming light from a light source (12), having the optical axis (12) as a center axis, and configured for...
8829889 Laser-protective wall element for a housing in laser machining stations  
A laser protective wall element for a housing in laser machining stations with which increased protection, in particular for the eyes of living beings, can be achieved. In a laser protective wall...
8803537 Solar module test control  
A method for conditioning a photovoltaic module for testing includes setting an effective irradiance of a continuous light source at a target plane, configuring a test photovoltaic module to...
8797019 Handheld fiber optic current and voltage monitor for high voltage applications  
A handheld fiber optic current and voltage monitor for applications in high voltage environment. A light source generates constant optical signal that is split by a fiber optic splitter into two...
8779755 Apparatus for testing power supply units based on light emitting diode flickers  
A test apparatus for a power supply unit is provided, which includes a body unit configured to define a space to receive a light emitting diode (LED) and to provide a test environment to test a...
8773119 System for fiber DC magneto-optic detection and method thereof  
A system for fiber DC magneto-optic detection and method thereof are provided. The system comprises a power supply and signal processing module (400), an optical fiber device (200), a...
8754630 Apparatus and method for measuring real time clock accuracy in an electric meter  
An arrangement for measuring an internal clock within an electricity meter includes an optical communication circuit within the meter, an optical detector external to the meter, and a frequency...
8718418 High voltage AC/DC or DC/AC converter station with fiber-optic current sensor  
DC current in a high voltage AC/DC or DC/AC converter station can be measured via the Faraday effect in one or more loops of an optical sensing fiber located at the base of a bushing extending...
8692539 Faraday effect current sensor  
The present invention relates to a Faraday sensor assembly comprising a first light guiding element adapted to guide electromagnetic radiation along a first propagation direction, and a second...
8686712 Time stretch enhanced recording scope  
A time-stretched enhanced recording scope (TiSER) is described using time stretch analog-to-digital conversion in a real-time burst mode. A chirped optical signal is modulated in response to...
8686713 In-water voltage gradient detector  
A voltage gradient detector provides notice when a potentially hazardous voltage gradient is present in water, employing at least one pair of spaced-apart electrodes connected to an LED. The...
8669757 Fibre monitoring apparatus and method  
An electric field sensor comprises an insulating substrate, a plurality of non-contacting electrodes disposed on the substrate, and a plurality of conductors coupled to the electrodes, and...
8664961 Validation of arc flash detection systems  
An arc flash validation unit may generate stimulus to be received by an arc flash detection unit (AFDU) and observe the response of the AFDU thereto. The response of the AFDU to the stimulus may...
8649010 Integral transformed optical measurement method and apparatus  
An optical measurement method for high-speed acquisition of integral transformed time domain optical signals is presented. A circuit network is used to generate a modulation signal and a reference...
8643360 In-water voltage gradient detector  
A voltage gradient detector provides notice when a potentially hazardous voltage gradient is present in water, employing a pair of spaced-apart electrodes connected to an LED. The electrode...
8633710 Method and apparatus for constructing images from measurements of impedence  
Apparatus and methods are disclosed for obtaining an image of the impedance properties of an object by inferring a measure of straight-line path impedance along a plurality of paths from a...
8629672 Generator circuit breaker with fiber-optic current sensor  
The current in a generator circuit breaker is measured using the Faraday effect of an optical sensing fiber looped around the breaker's conductor. The sensing fiber is arranged in a sensing strip,...
8624579 Fiber optic current sensor  
A Fiber-optic current sensor for sensing electric current carried in an electric conductor (18). Its optical section comprises: a light source (1); a directional coupler (2) with two ports (2A,...
8623283 Combined electrical and optical sensor for fluids  
The present invention relates to a sensor for the detection of an analyte, comprising a fluid holder (8), an optical detection system (3, 9) for carrying out an optical detection at the fluid...
8581572 Photovoltaic test apparatus  
An apparatus for testing photovoltaic cells wherein an array of light sources are provided. The light sources can have a collimating lens. In addition, one or more feedback circuits can be...
8558535 3-phase Faraday optical current sensor assembly  
A method and a system are provided for fixing a Faraday optical current sensor in a suitable measurement position for measuring the current in a 3-phase cable that includes 3 individual...
8558536 Solar simulator and a measuring method of a multi-junction photovoltaic devices  
A solar simulator and a measurement method of the multi-junction photovoltaic device is provided. The measurement method includes following processes. The process that the halogen lamp emits a...
8525511 Time division multiplexed detector for a magneto-optical current transducer  
A system monitors alternating current and includes a magneto-optical current transducer (MOCT) adapted to modulate an optical signal corresponding to magnitude of the alternating current. Beam...
8525512 Faraday optical current sensor arrangement  
A Faraday optical current sensor arrangement for measuring the current through a power line comprises a Faraday optical current sensor (38) having an elongated and substantially cylindrical shape...
8513963 Radio frequency testing apparatus  
A radio frequency (RF) testing apparatus, for testing device under test (DUT) comprising a receiving antenna, includes a pair of transmitting antennas transmitting wireless communication signals...
8513940 Method of measuring terahertz wave and apparatus therefor  
In a measurement of a time-domain waveform of a terahertz wave based on time-domain spectroscopy, a current signal including a component originating from the terahertz wave is detected using a...
8488114 Method and system for fiber-optic monitoring of spatially distributed components  
A system for monitoring a plurality of components distributed in different space locations, includes: at least one optical fiber path; an optical radiation source adapted to inject optical...
8476894 Monitoring circuit, method for outputting monitor signal, and optical receiver  
A monitoring circuit of the present invention provides a monitor signal with which a magnitude of a current flowing across a photodetector, such as a photodiode, can be calculated accurately over...
8461822 Temperature compensated fiber optic current or magnetic field sensor with insensitivity to variations in sensor parameters  
A fiber optic current or magnetic field sensor uses a sensing fiber in a coil for measuring a current or a magnetic field and has a retarder for converting between linearly polarized light and...
8441249 High voltage measurement device using poled fibers  
Two transversely poled fibers are disclosed which can be wound around a holder with their poling directions being anti-parallel. A coupling exchanges the polarization directions of the modes of...
8436632 System and method for optimizing LCD displays  
A method and system for determining the Vcom for a liquid crystal display by using a light diffusing unit.
8432153 Time stretch enhanced recording scope  
A time-stretched enhanced recording scope (TiSER) is described using time stretch analog-to-digital conversion in a real-time burst mode. A chirped optical signal is modulated in response to...
8405406 Detecting apparatus and imaging apparatus  
A detection apparatus and an imaging apparatus are capable of accurately conducting non-destructive observation of a target by using an incoherent electromagnetic wave. The detection apparatus has...
8395372 Method for measuring current in an electric power distribution system  
A method of measuring a current of a current carrying cable teaches the first step of providing an optical sensor assembly comprising a base unit, and an optical current sensor mounted on the base...
8391653 Device for applying a fiber-optic monitoring system to a component to be monitored  
An adapter device for applying a fiber-optic monitoring system to a component to be monitored includes a shell adapted to surround the component to be monitored, the shell having a rounded exposed...