Abstract: A current sensing line fault detector includes a unity gain buffer coupling a reference voltage to an IC pin, a current controlled current source coupled to the buffer, a current mode A/D converter developing a digital signal representative of the IC pin current, and logic for determining the state of a transmission line coupled to the IC pin. An alternative current sensing line fault detector includes an OPAMP having a first input coupled to an input node and to a reference current source and having a second input coupled to a reference voltage source. A voltage controlled current source (VCCS) is coupled between the first input of the OPAMP and ground and is controlled by an output of the OPAMP. An A/D converter is coupled to the output of the OPAMP to develop a digital output signal representative of the current flowing through the current sensor.

Abstract: A portable intermittent fault detector includes an enclosure that carries electronics and a display. The electronics are selected, arranged, and connected in a manner that minimizes noise, including noise that could interfere with an ability of the portable intermittent fault detector to detect intermittent faults in complex electrical systems. The portable intermittent fault detector also includes a passive heat management system hat conveys heat away from the electronics. In addition, a test module assembly of the portable intermittent fault detector includes an inner assembly with test module boards that are rigidly secured to one another and an outer support that carries the inner assembly in a manner that absorbs impacts and other forces on the portable intermittent fault detector.

Abstract: Disclosed herein is a current sensor that includes a bus bar and a magnetic sensor. The bus bar includes first and second cylindrical structure parts which are coaxially arranged, and a sensing part disposed in a hollow area surrounded by the first and second cylindrical structure parts. The magnetic sensor is disposed in the hollow area. The bus bar is configured to branch current to be measured into the first cylindrical structure part and sensing part and to make at least part of a current component of the current to be measured that flows in the first cylindrical structure part in one direction flow in the second cylindrical structure part in an opposite direction to the one direction.

Abstract: A scanning ferromagnetic resonance (FMR) measurement system is disclosed with a radio frequency (RF) probe and one or two magnetic poles mounted on a holder plate and enable a perpendicular-to-plane or in-plane magnetic field, respectively, at test locations. While the RF probe tip contacts a magnetic film on a whole wafer under test (WUT), a plurality of microwave frequencies (fR) is sequentially transmitted through the probe tip. Simultaneously, a magnetic field (HR) is applied to the contacted region thereby causing a FMR condition in the magnetic film for each pair of (HR, fR) values. RF output signals are transmitted through or reflected from the magnetic film to a RF diode and converted to voltage signals which a controller uses to determine effective anisotropy field, linewidth, damping coefficient, and/or inhomogeneous broadening for a sub-mm area. The WUT is moved to preprogrammed locations to enable multiple FMR measurements at each test location.

Abstract: A system includes a voltage source, a current source, and a testing station. The testing system is arranged to mechanically and electrically connect to multiple head gimbal assemblies (HGAs) simultaneously, and the testing station includes conductors for electrically coupling to conductive pads of the HGAs. The system further includes memory containing instructions for causing a computing device to connect either the voltage source or the current source to the conductors corresponding to each of the HGAs to be connected to the testing station.

Abstract: The present invention provides a method for detecting a positional change amount due to a movement of a moving body by reading, with a sensor, a plurality of gradations disposed along the direction of the movement.

Abstract: Techniques and apparatuses are provided for detecting a short circuit between pins of an integrated circuit package. The tested pins can be adjacent or non-adjacent on the package. Various types of short circuits can be detected, including resistive, diode and capacitive short circuits. Additionally, short circuits of a single pin can be tested, including a short circuit to a power supply or to ground. The test circuit includes a current mirror, where the input path has a first path connected to a first pin and a parallel second path connected to a second pin. A comparator is connected to the output path of the current mirror. By controlling the on and off states of transistors in the first and second paths, and evaluating the voltage of the output path, the short circuits can be detected.

Abstract: The invention provides a diagnostic device including: an input/output unit that receives an input of a current value indicating a value of a current of an electric motor measured by a sensor; a frequency analysis unit that converts the current value measured by the sensor into a frequency intensity; a deterioration mode decomposition unit that uses a state mode model indicating a change situation of a frequency intensity in a part constituting the electric motor to calculate an activity level indicating a time series change of a deterioration intensity for each state mode model from the frequency intensity; and an abnormality determination unit that determines a deterioration and an abnormality of each part using the activity level.

Abstract: Stand-alone remote sensor arrangement for monitoring parameter activity in a cable including a sensor unit, a power source unit, a connecting cable, and a control unit. The sensor unit includes a shielded housing enclosing a toroid-shaped core fixed around the cable to be monitored. The arrangement operates in a low current consumption mode and a measurement mode, in which measurement mode a Hall sensor element senses a predetermined parameter activity of the cable. The sensor unit includes a sensor activation unit arranged and structured to sense parameters related to magnetic field variations in the core caused by parameter activity of the cable, and to generate a sensor activation signal including parameter values dependent on sensed parameters. The control unit receives the signal and evaluates the parameter values in relation to predetermined mode changing criteria, and changes mode of operation of the arrangement dependent on the result of the evaluation.

Abstract: A flexible flat cable testing system includes a first connector including a row of first contacts electrically contacting first ends of a row of wires of a flexible flat cable, a second connector including a row of second contacts electrically contacting second ends of the row of wires, a short circuit test unit including output ports electrically connected to the row of first contacts and input ports electrically connected to the row of second contacts, a potential reader reading a potential level of each of the input ports, and a judgment unit determining whether or not a quality of the flexible flat cable is qualified according to the potential level of each of the input ports. The judgment unit determines that the quality of the flexible flat cable is qualified if the potential level of each of the input ports is equal to a high level output by each of the output ports.

Abstract: A fail-safe operating method for a decentralized power generation plant DG includes determining a leakage capacitance of a generator of the DG before connecting the DG. The method also includes comparing the determined leakage capacitance with a predetermined first limit value, and connecting the DG to a grid only if the determined leakage capacitance is smaller than the predetermined first limit value. A decentralized power generation plant is configured to perform the method.

Abstract: Method, device and system for determining a line property in the form of an arc on a power transmission line, wherein at least one test signal is coupled into the power transmission and an interference signal at an interference point, which is formed by the arc, is generated along the power transmission line with the aid of the at least one test signal, which interference signal is acquired as at least one measuring signal, and the line property is determined from the at least one measuring signal, where the line property is determined by detecting at least one intermodulation product from the at least one test signal and the mains signal of the power transmission line in the at least one measuring signal.

Abstract: A current-measuring unit, especially for measuring a battery current in a vehicle, includes a printed circuit board (12) and a first bus bar (16) leading to and fixed at the printed circuit board that provides at least one first shunt contact surface (30). A second bus bar (18) leading to and fixed at the printed circuit board provides at least one second shunt contact surface (42). A first measuring strip conductor (44) is associated with the first bus bar at the printed circuit board. A second measuring strip conductor (46) is associated with the second bus bar at the printed circuit board. A shunt resistor (48) has a first contact area (50) connected by soldering to the first bus bar and to the first measuring strip conductor and has a second contact area (52) connected by soldering to the second bus bar and to the second measuring strip conductor.

Abstract: The invention relates to a reflectometry system for detecting faults on a hardened multipoint connector of an electrical network, of the type that comprises a measuring probe, characterized in that it comprises an interfacing and impedance matching part that is electrically suitable for mounting on the connector to be tested and comprises a body provided with at least one element in the form of a collector ring for the contact masses of the connector and a measuring opening for the probe of the reflectometry system.

Abstract: The invention relates to a sliding test device for electronic components, which mainly comprises a base, a sliding frame and a pressing member, wherein an electronic component to be tested is placed in a chip receiving module of the base, and the sliding frame is slidably moved with respect to the base under sliding engagement between a first sliding guide and a second sliding guide so that a pressing block of the pressing member is aligned with the electronic component presses the electronic component. According to the present invention, the pressing member presses the electronic component and exerts a sufficient contact force on the electronic component, and a reaction force caused by the contact force and the elastic restoring force of probes is internally balanced in the device.

Abstract: A method, an apparatus and a system that may be configured to determine and provide a direction-to-source indicator on a signal level meter or other test instrument that may be used by a user of the meter (e.g., a technician, maintenance personnel or other personnel) to locate the source of leakage such as home leakage (HL).

Abstract: An electric working machine in one aspect of the present disclosure includes a motor, a drive current path, a resistor, a first current detector, a second current detector, and a fault determiner. The drive current path supplies the drive current to the motor. The resistor is disposed on the drive current path so as to receive the drive current. The first current detector detects a first detection value based on a first electromagnetic phenomenon with respect to the resistor. The second current detector detects a second detection value based on a second electromagnetic phenomenon with respect to the resistor. The fault determiner performs a faulty state determination based on the first detection value and the second detection value.

Abstract: A probing device includes a chuck configured to support a device under test (DUT); and a manipulator or probe card disposed above the chuck and including a plurality of probes protruding from the manipulator towards the chuck, wherein the chuck includes a roughened surface and vacuum suction holes for placement of wafer.

Abstract: An apparatus for measuring an insulation resistance according to the present invention includes: a first distribution resistor connected to a positive terminal of a battery and a ground; a first switch connected to the positive terminal of the battery and the first distribution resistor; a second distribution resistor connected to a negative terminal of the battery and the ground; a second switch connected to the negative terminal the battery and the second distribution resistor; and an insulation resistance measurement unit measuring a resistance value of a negative electrode insulation resistor of the battery using a first voltage applied to the first distribution resistor and measuring a resistance value of a positive electrode insulation resistor of the battery using a second voltage applied to the second distribution resistor.

Abstract: A test system includes a transmitter, capacitor, and receiver. The transmitter includes: an output circuit coupled to the receiver via the capacitor; a transmitting circuit transmitting a predetermined signal to a pad of the output circuit during a first test; a signal generator outputting a first signal and second signal to the pad during a first process and second process of a second test; and a comparator comparing the pad's signal with a reference signal in the first process and second process to determine whether the second test passes. The receiver includes: an input circuit coupled to the transmitter via the capacitor; a switch coupled between the input circuit and a receiving circuit to be conducting in the first test and second process and nonconducting in the first process; and the receiving circuit determining whether the first test passes according to the predetermined signal and assisting the capacitor in discharging.