Abstract: The steel plate material property testing device determining a material property of a surface of the steel plate by generating the eddy current in the steel plate includes: an eddy current tester disposed so as to face the steel plate; and a frame to which the eddy current tester is fixed, in which the eddy current tester includes: a coil disposed so as to form an alternating-current (AC) magnetic field in only one direction; an AC power supply unit connected to the coil; a sensor unit connected to the coil; and a material property determination unit connected to the sensor unit and determining the material property of the steel plate based on a measured signal obtained through the sensor unit.

Abstract: A method is provided for determining source match of a test system including an RF source, a vector network analyzer (VNA) and a test port. The method includes connecting a first calibration standard to the test port; generating an RF signal using the RF source, and applying the RF signal to the first calibration standard; measuring a first incident signal of the RF signal at a first receiver of the test system, and measuring a first reflected signal at a second receiver of the test system; connecting a second calibration standard to the test port; measuring a second incident signal of the RF signal at the first receiver of the test system, and measuring a second reflected signal at the second receiver of the test system; and determining the source match of the test system using the first incident and reflected signals and the second incident and reflected signals.

Abstract: A system and method for determining fiber orientation within a layered composite using an eddy current probe is discussed. The eddy current probe includes an array of coils that are excited such that an effective pole of the end effector of the probe moves in a ring pattern. The eddy current probe is moved across the surface of a part such that a two-dimensional scan of the part is generated, analogous to a C-scan in ultrasonic testing. The eddy current probe is able to be used to determine the fiber orientation of a layered composite material by scanning at a single point on the material. The eddy current data is able to be fused with data from an ultrasonic transducer to produce a comprehensive view of the part.

Abstract: A system for detecting forbidden objects worn or carried by individuals includes a metal detector having at least three transducers arranged on either side of a passage, two of these transducers being positioned on the one same side of the passage and spaced apart longitudinally in the direction of travel through the passage, while the third transducer is positioned on the opposite side of the passage so that the three transducers are available in combination to perform spatial discrimination of the location of the metallic objects detected.

Abstract: An inductive-capacitive resonant sensor architecture includes an inductively-coupled extender (ICE) that can both increase read range and lessen the effects of reader/sensor misalignment. The ICE can include a first coil configured with respect to a resonant sensor and a second coil separated from the first coil and coupled to the first coil by electrical wires. An external reader can be arranged with respect to the second coil. This architecture can nearly eliminate misalignment issues between the external reader and the resonant sensor. The ICE can be implemented with a closed circuit design. Additional apparatus, systems, and methods are disclosed.

Abstract: A calibration circuit may include a calibration signal generator configured to receive an oscillator signal provided by an oscillator and generate a calibration signal based on the oscillator signal. The calibration signal may be generated to have a predetermined amplitude. The calibration circuit may include a calibration peak detector configured to detect a peak amplitude of the calibration signal. The calibration circuit may include a logic circuit configured to calibrate a peak detector connected to the oscillator based at least in part on the peak amplitude of the calibration signal.

Abstract: The present invention relates to an eddy current sensor for detecting a crack in a battery cell, and a system for detecting a crack of a battery cell including the eddy current sensor. According to the present invention, it is possible to easily detect a crack generated in an electrode, an electrode tab or a welded portion.

Abstract: A nuclear magnetic resonance coil array and a decoupling method thereof, and a nuclear magnetic resonance detection device. The coil array includes: a coil resonant unit and a decoupling network unit, where the coil resonant unit includes multiple coil resonant circuits; the decoupling network unit includes multiple decoupling circuits; where a coil resonant circuit includes a coil and a resonant capacitor; the resonant capacitor in each coil resonant circuit is connected in parallel with the coil; the coils in each coil resonance circuit are equally spaced on a circumference; a decoupling circuit is provided between a positive terminal and a negative terminal of adjacent coils, respectively; each coil is connected to an antenna switching circuit of a nuclear magnetic resonance detection device at the same time.

Abstract: A system for detecting a target object including: a first and a second detector which have magnetic sensors configured to detect a magnetic field and to generate a signal which indicates a magnetic field intensity; a processing unit configured to receive the signals which indicate an intensity of a magnetic field detected by the sensors; and a communication interface which is configured to transmit the signals generated by the magnetic sensors to the processing unit, the processing unit additionally being configured to determine a corrected value of the signals generated by the magnetic sensors of the first and second detectors and, when the corrected value is greater than a predetermined threshold value, to send instructions for generating an alarm.

Abstract: A duty cycle measurement (DCM) device includes a charge pump circuit and a clocked comparator circuit. The charge pump circuit is configured to receive a clock signal that has an unknown duty cycle and to generate a capacitor voltage based on the duty cycle of the clock signal. The clocked comparator circuit is configured to receive the capacitor voltage and a reference voltage and to generate a digital output code based on the capacitor voltage and the reference voltage. The digital output code is indicative of the duty cycle of the clock signal. The charge pump circuit is further configured to receive the digital output code. A method of determining a duty cycle of a clock signal is also disclosed.

Abstract: A Hall sensor is disclosed. The Hall sensor comprises a first Hall element, configured to detect a component of a magnetic field in a first direction a using a sensitive area of the first Hall element. The Hall sensor further comprises a second Hall element, configured to detect a component of the magnetic field in a second direction b using a sensitive area of the second Hall element. The Hall sensor further comprises a conductor track, configured to generate a calibration magnetic field. The calibration magnetic field has a significant component on the sensitive area of the first Hall element in the second direction b. The calibration magnetic field further has a significant component on the sensitive area of the second Hall element in the first direction a.

Abstract: A non-destructive inspection method of detecting defects in a pouch-type secondary battery is disclosed. The defects are due to a crack or weld condition of an electrode sealed with a pouch. The method is used in a manufacturing process of the pouch-type secondary battery, where the manufacturing process includes an electrode tab pre-welding process; an electrode tab main-welding process; and a packing process. The method can include a first crack condition inspecting operation; a second crack condition inspecting operation; and a weld condition inspecting operation. The first crack condition inspecting operation inspects a first crack condition of the electrode tabs which occurs in the electrode tab pre-welding process. The second crack condition inspecting operation inspects a second crack condition of the electrode tabs, which occurs in the electrode tab main-welding process. The weld condition inspecting operation inspects a weld condition of the electrode tabs.

Abstract: Rotary position sensors are provided. In one example implementation, a rotary position sensor can include a first member and a second member, one of the first and second members having a transmit aerial and a receive aerial and the other of the first and second members having an intermediate coupling element. The receive aerial has at least one receive conductive winding arranged to form a first set of current loops and a second set of current loops. The intermediate coupling element comprises a conductive material arranged in a pattern. The pattern of the intermediate coupling element and the layout of the first and second set of current loops are mutually arranged such that any electromotive force induced in the first set of current loops by a background magnetic field is substantially balanced by an electromotive force induced in the second set of current loops by the background magnetic field.

Abstract: In a magnetic sensor, first and second resistors are provided in a path that connects a power supply port and a first output port, and third and fourth resistors are provided in a path that connects a ground port and the first output port. In a direction parallel to an X direction, both of a distance between the first resistor and the second resistor and a distance between the third resistor and the fourth resistor are ?/2, and a distance between the first resistor and the third resistor is zero. A magnetization of a magnetization pinned layer in the first and fourth resistors contains a component in a ?X direction. The magnetization of the magnetization pinned layer in the second and third resistors contains a component in the X direction.

Abstract: Variable reluctance (VR) resolvers applicable to even or odd speed are provided. In an N-phase VR resolver, 2N coil-poles are evenly distributed around the stator, N being odd integer greater than or equal to three. Primary coils are wound with the same number of turns, but their winding polarities alternate across the coil-poles. The number of turns and winding polarities for sine and cosine signal sensing coils are determined by sine and cosine synthesis coefficients of N-phase zero-force transform. The coil turns ratios between sine and cosine signal sensing coils relative to the primary coil are dictated by absolute values of the coefficients, while the winding polarities are determined by signs of the coefficients. In odd-speed VR resolvers, winding polarities of pair of sensing coils symmetrically located 180 degrees apart must be identical, whereas in even-speed VR resolvers, these winding polarities must be opposite.

Abstract: A probe head and a probe card having the same are provided. The probe head includes a plurality of guide plates each having a guide hole, wherein each of the guide plates has a shape in which a plurality of layers are stacked, and each of the guide plates includes: a first guide layer provided at a lowermost side thereof, and having a first guide hole; and a second guide layer provided at an uppermost side thereof, and having a second guide hole, wherein a side wall of the first guide hole and a side wall of the second guide hole are not provided on the same vertical line.

Abstract: Placing a first side of an active thermal interposer device of a thermal management head against a device under test (DUT). Disposing a cold plate against a second side of the active thermal interposer. The DUT includes a die and the active thermal interposer device includes a plurality of zones, each zone of the plurality of zones corresponding to a respective module of the plurality of modules and operable to be selectively heated. Receiving a respective set of inputs corresponding to each zone of the plurality of zones. Performing thermal management of the plurality of modules of the DUT by separately controlling temperature of each zone of the plurality of zones by controlling a supply of coolant to the cold plate, and individually controlling heating of each zone of the plurality of zones.

Abstract: A soil testing device includes at least one sensor assembly, after the sensor assembly is inserted into soil, the sensor assembly and the soil cooperatively form a battery cell; and an analog meter, electrically connected with the at least one sensor assembly, the at least one sensor assembly is configured to transmit a micro current of the battery cell reflecting a measure of soil characteristic to the analog meter, the analog meter is configured to display a value reflecting the soil characteristic.

Abstract: A moisture sensor includes a circuit board and a plurality of circuits monitoring a plurality of moisture probes, wherein at least two sets of a plurality of probes are on the bottom of the sensor, one set in direct contact with the floor, a second set separated from the floor; a set of conductive pins that enable the body of the circuit board to be spaced from the floor to help any moisture accumulation beneath the sensor to evaporate, preventing mold growth; two sets of a plurality of probes along the edge of the sensor, such that when the sensor is installed edge on, these edge sensors will be in direct contact with the floor. The sensor transmits data periodically when sensed resistance is below a predetermined value.

Abstract: A warning method for battery thermal runaway includes: acquiring current temperature data of each temperature sensor arranged in a battery pack, current voltage data of each voltage sensor arranged in the battery pack, and current sensor disconnection data of each temperature sensor; calculating a number of occurrences of a primary feature at a current moment according to the current temperature data; calculating a number of occurrences of a secondary feature at the current moment according to the current voltage data and the current sensor disconnection data in a case that the number of occurrences of the primary feature is greater than 0; calculating a sum of the number of occurrences of the primary feature and the number of occurrences of the secondary feature at the current moment; and sending a warning for battery thermal runaway when the sum is greater than a preset feature number threshold.