Abstract: Disclosed is a method of monitoring a condition of objects in a piping system in which each object has a surface exposed to a product flowing through a pipe in the piping system. The method allows for the condition of each object to be monitored whilst the object remains in place. The method includes repeatedly measuring a resonance frequency of an oscillatory element of a vibratory device that is installed in the pipe and that exhibits a susceptibility to an impairment caused by accretion, abrasion, and/or corrosion corresponding to the respective susceptibilities of the objects. The resonance frequency of the vibratory device is reduced by accretion and increased by corrosion and by abrasion of its oscillatory element. The method further includes monitoring the condition of the objects based on the measured frequencies.

Abstract: It is provided a current recording method, a current recording device and a current recording system by the embodiments of this disclosure. The current recording method comprises: acquiring a first current Fourier value, the first current Fourier value being a Fourier value acquired by Fourier transforming an instantaneous value of current at a first end of a power line; acquiring a second current Fourier value, the second current Fourier value being a Fourier value acquired by Fourier transforming an instantaneous value of current at a second end of the power line; time-alignment the first current Fourier value and the second current Fourier value, based on a first transmission delay for acquiring the first current Fourier value and a second transmission delay for acquiring the second current Fourier value; storing the aligned first current Fourier value and second current Fourier value into a storage.

Abstract: The present disclosure provides a gas sensor comprising a gas sensing layer fabricated based on a solution-processed, template-free synthesis method that achieves controllable ZnO nanostructured morphologies. The method is based on promotion and suppression of growth at specific crystallographic dimensions by tuning the polarity of the solvent. The gas sensing layer with the ZnO nanostructures exhibits high response, excellent selectivity and rapid recovery time.

Abstract: A batteryless, chipless, sensor is disclosed which includes a substrate, at least two conductive strips disposed on the substrate, a passivation layer encasing the substrate and the at least two conductive strips, wherein the conductive strips are adapted to respond to an interrogation signal from a reader having a first polarization, with a response signal at a second polarization different than the first polarization.

Abstract: A pressure sensor, includes: a first substrate; a pressure sensing layer on one surface of the first substrate; and a driving electrode and a sensing electrode on the pressure sensing layer and spaced apart from each other, wherein the driving electrode and the sensing electrode are on a same layer, and each of the driving electrode and the sensing electrode is directly on the pressure sensing layer.

Abstract: In order to provide a piezo valve in which it is possible to accurately predict the remaining lifespan of a piezo actuator, there are provided a valve seat, a valve body that is able to move between a fully closed position in contact with the valve seat and a fully open position, a piezo actuator that drives the valve body, a drive circuit that receives an input signal, and outputs to the piezo actuator a corresponding drive voltage, and a leakage current detector that, when the drive circuit outputs a voltage equal to or greater than a maximum rated voltage that drives the valve body to the fully closed/open position, detects leakage current from the piezo actuator. When the leakage current is detected or in a state immediately prior to detection, a fluid is flowing between the valve seat and the valve body.

Abstract: A semiconductor device in which a transistor has the characteristic of low off-state current is provided. The transistor comprises an oxide semiconductor layer having a channel region whose channel width is smaller than 70 nm. A temporal change in off-state current of the transistor over time can be represented by Formula (a2). In Formula (a2), IOFF represents the off-state current, t represents time during which the transistor is off, ? and ? are constants, ? is a constant that satisfies 0<??1, and CS is a constant that represents load capacitance of a source or a drain.

Abstract: An electromagnetic measuring probe device for measuring a thickness of a dielectric layer of a circuit board and a method thereof are disclosed. The circuit board has at least one dielectric layer, at least two conductive layers and a test area. The test area has a test pattern and a through hole. The electromagnetic measuring probe device has a probe-measuring unit, an external conductive element, plural magnetic powder groups, and a maintaining unit. The probe-measuring unit has a transparent tube and an internal conductive pin. The external conductive element electrically connects with the test pattern. The conductive layers and the internal conductive pin generate a magnetic field while the probe-measuring unit enters into the through hole. The magnetic powder groups magnetically attracted are gathered to positions corresponding to thickness-range positions of the conductive layers and held by the maintaining unit, thus a gap between the two dielectric layers is obtained.

Abstract: A method and apparatus for enhancing the sensitivity of an oscillator circuit functioning, in use, to sense changes in the inductance of inductive elements and/or the capacitance of capacitive elements coupled to said oscillator circuit. The oscillator circuit is coupled to a nonlinear resonator for generating a comb of frequencies in response to a drive frequency generated by the oscillator circuit, the comb of frequencies having at least a portion of at least one tooth for which an absolute value of the first derivative of the drive frequency with respect to said comb frequency is less than 1.0, comparing an output of the nonlinear resonator with an output of a reference oscillator for detecting changes in the drive signal of the oscillator circuit as enhanced by the slope of the at least a portion of at least one tooth for which the absolute value of the first derivative of the drive frequency with respect to said comb frequency is less than 1.0.

Abstract: An object of the present invention is to propose a partial discharge determination device and method that can highly reliably determine the degree of progress of partial discharge occurring in an underground power transmission cable without preparing plural standard patterns. A distribution pattern of a set of the charge amount and the occurrence phase angle of each partial discharge occurring in a period of one or more cycles of an applied voltage of a power transmission cable is sequentially generated, a first classification process in which the pattern is classified into any one of classes on the basis of a standard distribution pattern for each class and a second classification process in which the distribution pattern are executed, a classification result by the first classification process is evaluated on the basis of a classification result by the second classification process, and the degree of progress is determined.

Abstract: The present invention relates to a data acquisition of measurement data together with further data specifying the operation during a measurement. For this purpose, I/Q measurement data are obtained and the steps for operating a measurement device during the measurement are monitored. A metadata package is generated, which includes the obtained I/Q measurement data along with the monitored steps of operating the measurement device.

Abstract: The present inventive concept relates to a battery-free gas sensor or humidity sensor comprising a metal-organic framework and a method of manufacturing the same. In a photodiode-type battery-free gas sensor or humidity sensor according to the present inventive concept, since photoelectron collection electrodes are formed at certain intervals between P-N junction layers, when gas is adsorbed thereon, the gas can be detected without an extra power source by change of photocurrent. Due to fine pores of the metal-organic framework, gas sensitivity may be increased and stability of catalysts may be improved. When catalysts are not provided, humidity may be detected. Therefore, a system that used the photodiode-type battery-free gas sensor and the photodiode-type battery-free humidity sensor together may be performed humidity correction to accurately measure an amount of a gas.

Abstract: The present disclosure provides a method and system for ground fault detection. The method may include obtaining an input voltage and a null-ground voltage; determining whether the null-ground voltage is less than a voltage threshold; if yes, further determining whether the null-ground voltage is less than a preset voltage; if yes, determining that the grounding state is normal; if the null-ground voltage is greater than or equal to the preset voltage, determining that the grounding state is abnormal; if the null-ground voltage is greater than or equal to the voltage threshold, determining that the live wire and the null wire are reversed; in the case that the live wire and the null wire are reversed, determining whether the difference between the input voltage and the null-ground voltage is less than the preset voltage; if yes, determining that the grounding state is normal; if no, determining that the grounding state is abnormal.

Abstract: A device for measuring a moisture content in soil according to an aspect of the present invention comprises: a conductive wire structure which can be inserted into soil, includes a first and a second conductive wire, and is formed to have a predetermined structure, the first and the second conductive wire being insulatively coated and extending in parallel to and adjacent to each other; a capacitance measurement circuit for measuring the capacitance between the first and the second conductive wire by using an alternating current power source; and a moisture content calculation unit for calculating a moisture content of the soil by using the measured capacitance.

Abstract: A method for examining differential pair transmission lines, performed by a processor, comprising: capturing a plurality of first insertion losses of a first signal line within a frequency range and a plurality of second insertion losses of a second signal line within the frequency range, wherein the first signal line and the second signal line are configured to transmit a pair of differential signals; calculating a plurality of maximum error ratios between the first insertion losses and the second insertion losses within the frequency range; determining whether any one of the maximum error ratios is greater than or equal to an upper threshold; outputting a warning signal when the processor determines one of the maximum error ratios is greater than or equal to the upper threshold; and ending the method when the processor determines each one of the maximum error ratios is smaller than the upper threshold.