Abstract: The invention relates to a method (1) for monitoring a rotating machine (100) of an aircraft, wherein a measurement signal is acquired from the rotating machine. According to the invention, instantaneous frequencies (fK(t)) of sinusoidal components of the measurement signal are estimated, and, using a computing module (12), a plurality of successive iterations are carried out in each of which: complex envelopes of the components are updated (C1), parameters of a model of a noise of the signal are updated (C21) on the basis of the envelopes, whether the model has converged from the preceding iteration to the present iteration is tested (C4), with a view to: o if not, carrying out a new iteration, o if so, performing a computation (D) of the complex envelopes on the basis of the iterations that have been carried out.

Abstract: A circuit structure for testing through silicon vias (TSVs) in a 3D IC, including a TSV area with multiple TSVs formed therein, and a switch circuit with multiple column lines and row lines forming an addressable test array, wherein two ends of each TSV are connected respectively with a column line and a row line. The switch circuit applies test voltage signals through one of the row lines to the TSVs in the same row and receives current signals flowing through the TSVs in the row from the columns lines, or the switch circuit applies test voltage signals through one of the column lines to the TSVs in the same column and receives current signals flowing through the TSVs in the column from the row lines.

Abstract: In a method for determining vibrations generated by a device, first vibration measurements are received from a first accelerometer coupled to the device, the first vibration measurements comprising a first device vibration contribution and a first environmental vibration contribution, wherein the device is located within an environment comprising a plurality of devices capable of generating vibrations. Second vibration measurements are received from a second accelerometer located within the environment and not connected to the device, the second vibration measurements comprising a second device vibration contribution and a second environmental vibration contribution. The first vibration measurements and the second vibration measurements are compared. Based on the comparing, the first device vibration contribution is estimated.

Abstract: An apparatus includes an input probe configured to be placed on a first cluster of u-bumps disposed on a semiconductor die, output probes configured to be respectively placed on multiple clusters of u-bumps disposed on the semiconductor die, the multiple clusters being separately connected to the first cluster. The apparatus further includes a space transformer and printed circuit board (PCB) portion including a current source configured to supply a current to the input probe placed on the first cluster, resistors having a same resistance and being connected to ground, and tester channels at which voltages are respectively measured, the tester channels being respectively connected to ends of the output probes respectively placed on the multiple clusters and being respectively connected to the resistors. The apparatus further includes a processor configured to determine whether the input probe is properly aligned with the first cluster, based on the measured voltages.

Abstract: In some examples, a method of operating a circuit may comprise performing a circuit function under normal conditions, performing the circuit function under aggravated conditions, predicting a potential future problem with the circuit function under the normal conditions based on an output of the circuit function under the aggravated conditions, and outputting a predictive alert based on predicting the potential future problem.

Abstract: An automatic sensitivity adjusting analog ultrasonic sensor includes an ultrasonic transducer, and a front end adjustable gain amplifier that amplifies the received ultrasonic signal from the transducer. A processor generates a carrier signal and a heterodyning circuit combines the carrier signal and the amplified ultrasonic signal to form a modulated signal spectrum from which an audio spectrum signal is generated. The processor further monitors the amplitude level of the audio spectrum signal and executes an auto sensitivity adjustment algorithm that automatically adjusts the sensitivity (the gain) of the analog front end amplifier down if the amplitude is above a preset upper threshold or up if the amplitude is below a present lower threshold. The processor may also further monitors the amplitude level of the ultrasonic signal level directly from the front end adjustable gain amplifier and execute the auto sensitivity adjustment algorithm as required.

Abstract: A magnetic measuring apparatus includes at least one magnetic sensor, a coil, a driving circuit configured to supply a current to the coil, a conductor electrically connecting the coil and the driving circuit, and a computing device which estimates relative positions of the magnetic sensor and the coil based on a magnetic field generated by the current supplied to the coil and detected by the magnetic sensor. The magnetic sensor has a magnetic detection sensitivity in a particular direction, and the particular direction of the magnetic sensor and a current vector of the current flowing through the conductor are parallel.

Abstract: An automated resonant waveguide cavity system for determining one or complex permittivity measurements of a sample is provided. The automated resonant waveguide cavity system includes a resonant cavity, a waveguide coupled to the resonant cavity, a programmable network analyzer (PNA) coupled to the waveguide, and a computing device. The computing device includes a memory storing processor executable code for a determination engine and a processor executing the processor executable code to cause the determination engine to obtain data from the PNA. The data is respective to the sample within the resonant cavity. The determination engine further integrates a plurality of analytical and modeling functions in determining the complex permittivity values of the sample from the data.

Abstract: A method for testing a rotor blade component of a rotor blade for a wind power installation, comprising: dividing a rotor blade component of a rotor blade for a wind power installation into two, three or more rotor blade component segments, forming cutouts in a connection interface at a connection end of one of the rotor blade component segments. A rotor blade component segment of a rotor blade for a wind power installation, the rotor blade component segment comprising a connection end which has been formed by dividing a rotor blade component of a rotor blade for a wind power installation into two, three or more rotor blade component segments, a connection interface at the connection end of the rotor blade component segment, and cutouts which are formed in the connection interface and serve for connection of the rotor blade component segment to a test stand.

Abstract: A method for testing a lifetime of a surface state carrier of a semiconductor, including the following steps, 1) a narrow pulse light source is used to emit a light pulse, and coupled to an interior of a near-field optical probe, and the near-field optical probe produces a photon-generated carrier on a surface of a semiconductor material under test through excitation. 2) The excited photon-generated carrier is concentrated on the surface of the semiconductor material, and recombination is conducted continuously with a surface state as a recombination center. 3) A change in a lattice constant is produced due to an electronic volume effect, a stress wave is produced, and a signal of the stress wave is detected in a high-frequency broadband ultrasonic testing mode. 4) Fitting calculation is conducted on the signal of the stress wave to obtain the lifetime of the surface state carrier ?c.

Abstract: A non-transitory computer-readable storage medium storing a n EMI calculation program that causes at least one computer to execute a process, the process includes inputting circuit information of a first circuit to a machine learning model; acquiring an EMI value at a certain frequency of the first circuit; selecting, based on an impedance characteristic of the first circuit and the EMI value at the certain frequency, first EMI information from a plurality of pieces of EMI information in each of which an impedance characteristic of each of a plurality of circuits is associated with EMI values at a plurality of frequencies of each of the plurality of circuits; and acquiring an EMI value at another frequency different from the certain frequency of the first circuit based on the EMI value at the certain frequency and the first EMI information.

Abstract: The invention provides a semiconductor testkey pattern, the semiconductor testkey pattern includes a high density device region and a plurality of resistor pairs surrounding the high density device region, wherein each resistor pair includes two mutually symmetrical resistor patterns.

Abstract: A detector capable of detecting bearing faults in advance is disclosed. The detector includes a microprocessor with an input terminal connected to a power supply and an output terminal connected to a detection information output device. A resonance enhanced piezoelectric sensor is provided. A sensor trigger detection circuit is electrically connected between the sensor and the microprocessor. An input terminal of the sensor trigger detection circuit is connected in parallel with a sensor signal selection circuit. The sensor signal selection circuit is connected in series with a sensor signal processing circuit. An output terminal of the sensor signal processing circuit is connected in series with a programmable gain circuit. The programmable gain circuit is connected to the microprocessor. The sensor trigger detection circuit, the sensor signal selection circuit, the sensor signal processing circuit, and the programmable gain circuit are respectively connected to the power supply.

Abstract: Some aspects of this disclosure are directed to an automated method to check electrostatic discharge (ESD) effect on a victim device. For example, some aspects of this disclosure relate to a method, including determining a probe point, in a circuit design, for determining effective resistance between the probe point and ground, where the probe point is on an ESD path of in the circuit design. The method includes determining voltage between the probe point and the ground. The method further includes comparing, by a processing device, a resistance value of the ESD path determined based a predefined electric current value at a source point and the measured voltage with a target resistance value range. The method further includes reporting a violation upon determining that the determined resistance value of the ESD path is outside the target resistance value range.

Abstract: A system for measuring fence posts in a fence run includes a leading unit and a trailing unit. The leading unit includes a first measurement wire extending through a first rotary encoder and terminating in a second rotary encoder, a second measurement wire terminating in a third rotary encoder, and a third measurement wire terminating in a fourth rotary encoder, as well as a clamp to secure the leading unit to a fence post. The trailing unit includes a first rotary encoder to engage with the first measurement wire of the leading unit and a measurement wire terminating in a second rotary encoder, as well as a clamp to secure the trailing unit to a fence post.

Abstract: The present exemplary embodiments provide a signal detection circuit and a sensor which improve a quality factor of a resonator by modeling an initial state of the resonator using an attenuator and a phase shifter which are modeling paths and significantly change a transmission coefficient of the resonator even with a small variation of an object to be measured.

Abstract: A device and a method for gas-water-sand separation and measurement during a simulated exploitation of natural gas hydrates are disclosed. The device includes a natural gas hydrate formation and dissociation system and a filtering unit. The natural gas hydrate formation and dissociation system includes a compressed air pump, a reactor, and a water-bath temperature regulating unit. The filtering unit includes a kettle body, wherein an inlet end of the kettle body is connected to the sand-control liner zone, an outlet end of the kettle body is connected to a water-collecting container, and a plurality of filtering layers are disposed inside the kettle body from the inlet end to the outlet end. The method is conducted using the device. The device and the method realize the gas-water-sand separation and measurement of produced gas-water-sand mixture during a simulative exploitation process, allowing for a direct inspection on a sand production and sand control.

Abstract: A method for detecting a beacon signal using an above-ground tracker. The tracker comprises an antenna assembly comprising a plurality of antennas. Each antenna is oriented in a different direction. During operation, if the beacon signal is interrupted due to a local noise source, transmission of the beacon signal is stopped. The tracker then detects radiation from the local noise source and the processor determines a direction from which peak ambient noise arrives at the tracker. The beacon signal is then resumed. A processor included in the tracker excludes any signals generated by the antenna assembly that are representative of radiation that arrived at the tracker from the same direction the peak ambient noise arrived at the tracker. The tracker then detects the beacon signal using the non-excluded signals.

Abstract: The present disclosure relates to a thermal-acoustic-vibration three-parameter integrated in-situ sensor and system with a high-temperature-resistant and high-pressure-resistant structure. The provided thermal-acoustic-vibration three-parameter integrated in-situ sensor with a high-temperature-resistant and high-pressure-resistant structure comprises a heat detection device, a sound detection device and a vibration detection device; and the sound detection device and the vibration detection device are distributed on two sides of the heat detection device.

Abstract: An input device including an input circuit with an input connection point for applying an input signal and with an input signal path which leads from the input connection point to an evaluation input and on which a conversion of the input signal into an evaluation signal is effected, an evaluation device which includes the evaluation input and which is designed to recognise an input signal level of the input signal on the basis of the evaluation signal, wherein the evaluation device is further designed to carry out a functionality test of the input device and within the framework of the functionality test by way of providing a test signal to effect a first change of the evaluation signal and to test the functionality of the input device on the basis of the effected first change of the evaluation signal, wherein the input circuit includes a transistor which is connected into the input signal path, and the input circuit is designed to control a control terminal of the transistor on the basis of the test signal,