Abstract: A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency, and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to determine a measured change in a resonant frequency of the resistive-inductive-capacitive sensor and based on the measured change, modify the driving frequency.

Abstract: The invention relates to a method for detecting events by reflectometry in an electrical line of an avionic system, said line being fed with an AC voltage at a first frequency (f1), said AC voltage being sinusoidal and composed of a succession of alternate half-periods, said method comprising a step of injecting a reflectometry signal into the network, the reflectometry signal having a second frequency (f2) higher than the first frequency (f1); wherein the injecting step is synchronized with the AC voltage, the injecting step being carried out by injecting the reflectometry signal into the network during an injection duration (ti) comprised between the start and end of a half-period (t1) of the AC feed voltage.

Abstract: An ambulatory medical device comprises: a sensing component to be disposed on a patient for detecting a physiological signal of the patient; and monitoring and self-test circuitry configured for detecting a triggering event and initiating one or more self-tests based on detection of the triggering event. The ambulatory medical device senses the physiological signal of the patient substantially continuously over an extended period of time.

Abstract: Described is a security sensor comprising two or more sub-sensors for use in a variety of installations where different magnetic fields may be experienced by the security sensor as a result of the variety of installations. One of the sub-sensors may have a low magnetic sensitivity while the other sub-sensor may have a much higher sensitivity to magnetic fields. In operation, one or both sub-sensors are used to determine if a door or a window has been opened.

Abstract: An environmental testing apparatus includes: a plurality of blower fans that circulate air-conditioned air between an air conditioning chamber and a test chamber; a plurality of temperature sensors that measure temperature at a plurality of locations in the test chamber and output temperature data; and a control unit that can individually set rotation speed of each blower fan. The control unit executes setting processing for setting the rotation speed of each blower fan in a testing period in a setting period before the testing period. In the setting processing, the control unit changes the rotation speed of the plurality of blower fans a plurality of times, and acquires a plurality of temperature data after each change from the plurality of temperature sensors.

Abstract: A system includes a machine readable storage medium storing instructions and a processor to execute the instructions. The processor executes the instructions to receive radial k-space magnetic resonance imaging (MRI) data of a patient and determine a series of dipole sources via direct dipole decomposition of the radial k-space MRI data. The processor executes the instructions to identify an activation within the patient based on the series of dipole sources.

Abstract: Provided are a short circuit state analyzer to compare difference value when the AC excitation current is applied at a first frequency with a threshold value, to estimate a short circuit resistance from the difference value based on data indicating a relationship between the short circuit resistance and the difference value at the first frequency when the difference value is smaller than the threshold value, to cause an excitation power supply to apply the AC excitation current to the field windings at a second frequency lower than the first frequency when the difference value is equal to or greater than the threshold value, and to estimate the short circuit resistance from a difference value obtained by the AC excitation current at the second frequency based on data indicating a relationship between the short circuit resistance and the difference value at the second frequency.

Abstract: Systems and methods relate to electric propulsor fault detection. An exemplary system includes at least a first inverter configured to accept a direct current and produce an alternating current, a first propulsor, a first motor operatively connected with the first propulsor and powered by the alternating current, and at least a noise monitoring circuit electrically connected with the direct current and configured to detect electromagnetic noise and disengage the at least an inverter as a function of the electromagnetic noise.

Abstract: The disclosed technology generally relates to integrated circuit devices with wear out monitoring capability. An integrated circuit device includes a wear-out monitor device configured to record an indication of wear-out of a core circuit separated from the wear-out monitor device, wherein the indication is associated with localized diffusion of a diffusant within the wear-out monitor device in response to a wear-out stress that causes the wear-out of the core circuit.

Abstract: A driver circuit arrangement for driving a transistor bridge, which includes at least a first half-bridge composed of a low-side transistor and a high-side transistor, is described herein. In accordance with one example of the description, the circuit includes a current source and a detection circuit. The current source is operably coupled to the high-side transistor of the first half-bridge and configured to supply a test current to the first half bridge. The detection circuit is configured to compare a voltage sense signal, which represents the voltage across the high-side transistor of the first half-bridge, with at least one first threshold to detect, dependent on the result of this comparison, whether a short-circuit is present in the first half-bridge.

Abstract: A self-vibrating pH probe comprise a housing containing an electronic assembly to which is coupled a vibration source element so that at least a portion of vibrations caused by the vibration source element propagate to the electronic assembly, the vibration source element being controllable for at least on/off operation. The self-vibrating pH probe further comprising a pH probe member having a probe tip at a first end, the probe member extending from the housing and mechanically and electrically coupled by a second end to the electronic assembly so that at least a portion of vibrations propagating to the electronic assembly further propagate to the probe tip; and further including a processor coupled to the electronic assembly for coordinating operation of the vibration source element and operation of the pH probe member.

Abstract: In some examples, an electronic device includes a printed circuit board. In some examples, the printed circuit board includes a conductive base layer. In some examples, the conductive base layer is an electrode to produce a signal indicative of a change in an omnidirectional electrostatic field corresponding to a moving object. In some examples, the printed circuit board includes a via coupled to the conductive base layer. In some examples, the via is disposed through an intermediate layer of the printed circuit board. In some examples, the printed circuit board includes an integrated circuit coupled to the via. In some examples, the integrated circuit is to detect, using a machine learning model, a direction of the moving object in the omnidirectional electrostatic field based on a feature of the signal.

Abstract: An application method of a device for accurately evaluating the vertical content distribution of an undersea hydrate reservoir includes the following steps: assembling the device into a whole and screwing it into an undersea well; activating natural gas hydrates to produce gaseous substances; opening a directional guide channel corresponding to a thermal excitation system in a working state in S2, so that gaseous natural gas hydrates generated in this horizon enter a screw-in long sleeve through the directional guide channel; collecting, by a gas collection system, the gaseous natural gas hydrates; analyzing and recording components and contents in a box by an optical ranging unit and a resistivity unit; repeating S4 and S5 till the end of one collection cycle; and performing data processing and analysis. In this way, accurate evaluation of the vertical content distribution of undersea hydrates is realized.

Abstract: A technique and a system are used to analyze incremental quantities. The instantaneous electrical measurements associated with a loop in a multiple-phase electric power delivery system are obtained before a fault occurred on the loop and after the same fault occurred on the same loop, and differences between the instantaneous electrical measurements at different times are used to determine incremental quantities, which are used to determine a location of the fault on the loop. Multiple loops in the multiple-phase electric power delivery system are monitored to determine corresponding fault locations on each loop.

Abstract: An automated method for determining a coagulation result of a biological sample is presented. The method includes obtaining a time series representing measurement data of a sample. The time series spans a period in which a clotting reaction is supposed to take place. The method includes obtaining a global model function configured to model measurement data of a sample in which a clotting reaction takes place. The global model function is configured to model the measurement data as a sigmoidal shape with at least one inflection point. The absolute value of the maximum curvature of the sigmoidal shape is larger on one side of the at least one inflection point than on the other side. The method includes fitting the model function to the time series representing measurement data to obtain a fitted model function and determining a coagulation result of the sample based on the fitted model function.

Abstract: Examples of operating an Intelligent Electronic Device (IED) during power swings, are described. In an example, voltage measurements for a phase is received and sampled. Root mean square (RMS) values of the voltage samples is calculated based on the voltage measurements. Delta quantities for each phase are calculated based on the RMS values. Each of the RMS values and delta quantities are associated with respective sampling instants. In response to a delta quantity being greater than a predefined threshold, a peak delta quantity is detected. A time interval between a sampling instant associated with the peak delta quantity and a sampling instant associated with a first delta quantity is determined. Based on a comparison of the time interval with a threshold time, a disturbance condition may be detected as a power swing and consequently, fault detection at the IED may be blocked.

Abstract: A system and method for monitoring the health of a heater connected to a power supply by first and second power leads which conduct an inlet and outlet current, respectively. The system includes an injection transformer with a number of primary turns that are inductively coupled to the first power lead, a signal generator configured to generate and supply a time-varying injection signal to the primary turns thereby imposing the time-varying injection signal on the inlet current, and a signal reader configured to receive a diagnostic signal from the heater, filter the diagnostic signal to pass a frequency associated with the time-varying injection signal, and produce a heater capacitance signal that is indicative of a capacitance value of the heater, where the heater capacitance signal is indicative of the health of the heater.

Abstract: An optical probe receives an optical signal output from a test subject. The optical probe includes an optical waveguide composed of a core portion and a cladding portion disposed on an outer periphery of the core portion, wherein an incident surface of the optical waveguide, which receives the optical signal, is a convex spherical surface with a constant curvature radius.

Abstract: A method for detecting an isolation fault in an electrical installation comprises: measuring an AC electrical voltage between phase conductors of an electrical load to be monitored and ground, and an electric fault current flowing between said electrical load and ground; identifying, in the measured electrical voltage, at least one first component oscillating at the predefined first frequency and one second component oscillating at the predefined second frequency; calculating an impedance of the electrical fault from the measurements and an impedance of the electrical installation from the identified first and second components; selecting a predetermined case from a predefined list; and identifying an operating condition of the electrical installation on the basis of the selected predetermined case.

Abstract: An electronic system can be used to monitor temperature. The electronic system can include a characterized dielectric located adjacent to a plurality of heat-producing electronic devices. The electronic system can also include a leakage measurement circuit that is electrically connected to the characterized dielectric. The leakage measurement circuit can be configured to measure current leakage through the characterized dielectric. The leakage measurement circuit can also be configured to convert a leakage current measurement into a corresponding output voltage. A response device, electrically connected to the leakage measurement circuit can be configured to, in response to the output voltage exceeding a voltage threshold corresponding to a known temperature, initiate a response action.