Abstract: An apparatus, system and method for detecting defects in building structures is provided. The apparatus includes a detector operable to determine an indication of the defect; and a transmitter operable to wirelessly transmit the indication from the apparatus to a central controller. The system includes the detection unit; a locator operable to determine the location of the detection unit; and a memory for storing the indication and the location in association with each other. The memory may be part of a central controller in wireless communication with the detection unit. The apparatus or central controller may include a processor operable to determine from a plurality of measurements performed by the detection unit a resultant measurement vector indicating a direction from the detection unit toward the defect. The detection unit may be operable to autonomously change its location. A display showing resultant measurement vectors at various locations can be produced.

Abstract: Provided is a discharge ionization current detector that is highly durable and yet can be produced at a low cost. An electrode structure 19 consisting of a dielectric-coated metal tube 16, with an insulator-coated metal wire 18 included therein, is inserted from above into a first gas passage including a dielectric tube 10. The metal tube 16 is connected to the ground on the upstream side of the first gas passage. One end of the metal wire 18 is extracted from the upstream side of the first gas passage to the outside and connected to a bias power source 33. An area which is not covered with the insulator is provided at the other end of the wire 18. This area is arranged in a second gas passage, which extends from the downstream end of the first gas passage. A metal electrode consisting of a flanged metal tube 28 is placed in the second gas passage and connected to an ion current detecting circuit 34.

Abstract: An apparatus and method provides for nondestructive inspection of a generally tubular target structure (such as a wellbore casing) by rolling contact engagement of one or more rolling probe devices with the target structure. Each rolling probe device carries electromagnetic (EM) measurement instrumentation to capture measurement data during rolling contact engagement with the casing. Each rolling probe device may comprise an instrumentation carrier (e.g., a roller or a wheel) having an endless tread surface to engage the target structure, with the EM measurement instrumentation extending along the endless tread surface and being located at or adjacent an exterior of the instrumentation carrier. A plurality of such rolling instrumentation carriers can be mounted at azimuthally spaced positions on a tool body configured for axial movement along a wellbore.

Abstract: In a system for monitoring the operation of a current loop, which is fed by a current source and has a switching element, an evaluation unit is arranged at the output of the current loop, which evaluation unit is designed to identify a state of the switching element on the basis of the current flowing in the current loop. Furthermore, a signal generation device is arranged in the current loop, which signal generation device is connected to the switching element and is designed to generate a dynamic signal characterizing the state of the switching element in the current loop.

Abstract: A testing device and method of a quantum battery by a semiconductor probe capable of evaluating electric characteristics of a charge layer in the middle of a production process of the quantum battery without damaging the charge layer. On semiconductor probe constituted by stacking electrode and metal oxide semiconductor on support body, and probe charge layer is formed of the same material as that of quantum battery and irradiated with ultraviolet rays. Forming probe charge layer of same material as that of quantum battery on semiconductor probe enables evaluation without damaging charge layer of the quantum battery. Testing device and method are provided which measure the charge/discharge characteristics of a charge layer in the middle of producing the quantum battery by a voltmeter and a constant current source or a discharge resistor by using the semiconductor probe including the probe charge layer.

Abstract: Electromagnetic streamer cables and methods of use. Example systems include: a first electrode, the first electrode at a first location along the streamer cable; a second electrode at a second location along the streamer cable; a first sensor module electrically coupled to the first electrode and second electrode, the first sensor module configured to measure a voltage across the first and second electrodes; a third electrode at a third location between the first and second electrodes; a fourth electrode at a fourth location along the streamer cable, the fourth location distal to the second location; and a second sensor module electrically coupled to the third electrode and fourth electrode, the second sensor module configured to measure a voltage across the third and fourth electrodes.

Abstract: An apparatus provides precision measurement of voltage drop across a semiconductor switching element of a subsea device.

Abstract: A DC arc fault detection module includes a current detecting section having at least one output, wherein the current detecting section is structured to determine whether at least one signal based on a current measured from a DC supply line exceeds at least one corresponding predetermined threshold level and cause the at least one output to indicate that the threshold level has been exceeded. The module also includes a processing device structured to: (i) receive the at least one output, (ii) determine whether an arc fault in the DC electrical system has occurred based on at least the at least one output, (iii) determine an estimation of background noise based on at least one signal indicative of a current on the DC supply line, and (iv) adjust the at least one corresponding predetermined threshold level based on the estimation of background noise.

Abstract: In an embodiment, a method for measuring passive intermodulation (PIM) associated with a device under test (DUT) includes generating a test signal using a measuring instrument and obtaining measurements of PIM for the DUT. The test signal comprises two or more tones each amplified to a target output power by a respective amplifier according to a duty cycle. Measurements are obtained by the measuring instrument during an active portion of each duty cycle over a sweep of frequencies. PIM is calculated for the DUT by averaging a plurality of measurements obtained for each frequency from the sweep of frequencies. The duty cycle is determined based on the target output power.

Abstract: An apparatus includes an interruption circuit in a power delivery path, and a fault detection circuit configured to provide a fault signal to selectively cause the interruption circuit to interrupt power delivery, wherein the fault detection circuit includes a fault detection integrated circuit and a sensing coil configured to sense a differential current between a phase conductive path and a neutral conductive path in the power delivery path. A processor is configured to selectively control a fault simulation circuit to simulate a fault in the power delivery path, detect a response of the fault detection circuit to the simulated fault, and determine if the response of the fault detection circuit is an expected response. The processor provides an override signal to the interruption circuit to prevent the interruption circuit from receiving a fault signal from the fault detection circuit during, and for a predetermined time after, the simulated fault.

Abstract: An insulation resistance detection method and circuit for an ungrounded DC power supply systems. When the ratio of the voltage of the positive bus to that of the negative bus exceeds a preset range, the DC current is injected into the ungrounded DC power supply systems. DC power supply systems have essentially some grounded stray and external capacitors, so some of the injected DC current will flow into the grounded capacitor, increasing the voltage of the fault bus and the leakage current. The proposed method increases the leakage current by the injection of DC current, so the current sensor can detect the leakage current from which the insulation resistance can be calculated. The DC current injection method can significantly improve the detection of ground insulation faults in ungrounded DC power supply systems.

Abstract: A mixed signal testing system capable of testing differently configured units under test (UUT) includes a controller, a test station and an interface system that support multiple UUTs. The test station includes independent sets of channels configured to send signals to and receive signals from each UUT being tested and signal processing subsystems that direct stimulus signals to a respective set of channels and receive signals in response thereto. The signal processing subsystems enable simultaneous and independent directing of stimulus signals through the sets of channels to each UUT and reception of signals from each UUT in response to the stimulus signals. Received signals responsive to stimulus signals provided to a fully functional UUT (with and without induced faults) are used to assess presence or absence of faults in the UUT being tested which may be determined to include one or more faults or be fault-free, i.e., fully functional.

Abstract: A method and apparatus for testing operability of a power converter with an existing power conversion assembly of a renewable energy system is disclosed. The method includes transferring a first pulse of energy from an existing power conversion assembly to a power filter of the power converter through first cells within a bridge circuit of the power converter. Another step includes determining a first current-voltage feedback associated with the first pulse. A next step includes transferring a second pulse of energy from the power filter to the existing power conversion assembly through second cells within the bridge circuit such that a portion of the first pulse moves back to the existing power conversion assembly. Another step includes determining a second current-voltage feedback associated with the second pulse. The first and second current-voltage feedbacks are compared with nominal tolerances of the power converter to ensure the power converter is operating properly.

Abstract: A system for measuring a loss in power between a power transmission side and a power reception side in a high voltage direct current (HVDC) system is provided. The system for measuring the loss in power includes: a first loss measurement unit installed at the power transmission side, and a second loss measurement unit installed at the power reception side, wherein each of the first and second loss measurement units is installed at a location at which a current or voltage is measured, and includes a voltage sensor for measuring a voltage, a current sensor for measuring a current, a GPS module for providing time information on when measurement is performed by the voltage sensor and the current sensor, and a storage unit storing the time information along with a voltage value and a current value measured by the voltage sensor and the current sensor.

Abstract: The Configurable Vertical Integration [CVI] invention pertains to methods and apparatus for the enhancement of yields of 3D or stacked integrated circuits and herein referred to as a CVI Integrated Circuit [CVI IC]. The CVI methods require no testing of circuit layer components prior to their fabrication as part of a 3D integrated circuit. The CVI invention uses active circuitry to configure the CVI IC as a means to isolate or prevent the use of defective circuitry. CVI circuit configuration method can be predominately described as a large grain method.

Abstract: A battery pack, a method for detecting the battery pack, a charging assembly, and an electric tool are provided for detecting voltage and disconnection of the battery cells. The battery pack may have an output voltage of at least 56V and may include a plurality of series connection units. A voltage detecting module may be utilized for detecting voltage in the battery pack. A battery control module configured to control voltage detecting module may also be employed. The method may involve determining whether the series connection units are disconnected based on rates of voltage change or internal-resistance of the series connection units.

Abstract: Methods and apparatus are provided for passively detecting the presence of near-surface human-scale underground anomalies using earth field measurements. A sensor is used to measure at least one electric or magnetic component of the Earth's electromagnetic field at a frequency of 5 kHz or greater in proximity to the Earth's surface for a given area. The measured intensities are used to identify variations indicative of the presence of a near-surface human-scale underground anomaly. Measuring the intensity of at least one component of the electromagnetic field at a plurality of frequencies of 5 kHz or greater can be used to determine the depth and characteristic of a near-surface human-scale underground anomaly.

Abstract: A portable electronic device is provided. A power management unit provides a first voltage and a second voltage. A multi-core cluster includes a first processing core configured to be powered by the first voltage and operate at a first operating frequency and a second processing core configured to be powered by the first voltage or the second voltage and operate at a second operating frequency. A third processing core is configured to be powered by the second voltage and operate at a third operating frequency. A first switch is configured to selectively provide the second voltage to the third processing core or stop providing the second voltage to the third processing core according to a first control signal. A second switch is configured to selectively provide the first voltage or the second voltage to the second processing core according to a second control signal.

Abstract: A connector assembly for a portable field device testing includes a two-wire communication line to provide communication between a handheld maintenance tool and a field device, a first two-prong plug to provide power and communication signals to the field device and a shunt plug to provide power to the field device using the two-wire communication line.

Abstract: A structure and method of facilitating testing of an electronic device (device under test or DUT) using a non-permanent and reusable structure to terminate contact pads and contact pin holes on a surface of the DUT.