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46results about How to "High precision diagnosis" patented technology

Failure detection apparatus for an internal combustion engine

A failure detection apparatus for an internal combustion engine includes failure detecting means (S22-S30) for detecting abnormality of fresh air quantity detecting means (air flow sensor) based on the result of comparison between a fresh air quantity detected by the fresh air quantity detecting means (air flow sensor) and a reference value for the fresh air quantity set by fresh air quantity reference value setting means (S20), and an EGR device (EGR passage, EGR valve, target opening setting means, EGR valve control means). The fresh air quantity reference value setting means sets the reference value (S16) in accordance with not only the operating state (engine speed Ne, fuel injection quantity Qf, etc.) of the engine but also a target EGR valve opening set by target opening setting means (S12, S14).
Owner:MITSUBISHI FUSO TRUCK AND BUS CORPORATION

Fault diagnosis apparatus and machine learning device

A fault diagnosis apparatus is provided with a machine learning device, and the machine learning device observes at least one of fault time point data including information at the occurrence of a fault of a motor drive apparatus to be repaired, and operating environment data indicating an operating environment, operating history data indicating an operating history, as a state variable representing the present state of the environment; acquires repaired and / or replaced part data indicating a part that has been repaired and / or replaced in the motor drive apparatus as label data; and performs learning by associating the observed state variable with the acquired label data.
Owner:FANUC LTD

Safety Diagnosis System For Structure

The invention provides a safety diagnosis system for structure, which comprises one GNSS receiver installed on an upper floor of a structure, a control device having a storage unit for storing a program which prepares an absolute displacement curve of the structure based on an absolute coordinate measured by the GNSS receiver and a displacement of the absolute coordinate, calculates a maximum inter-layer displacement and a maximum inter-layer deformation angle per each floor based on the absolute displacement curve and prepares an inter-layer deformation angle curve and a judging unit for performing a diagnosis of the safety of the structure based on the maximum inter-layer displacement and the maximum inter-layer deformation angle, and a display unit, wherein the control device calculates the maximum inter-layer displacement and the maximum inter-layer deformation angle per each floor and the inter-layer deformation angle curve based on a displacement of the absolute coordinate and the program and makes the display unit display a diagnosis result of the structure as evaluated by the judging unit based on at least one of the maximum inter-layer displacement and the maximum inter-layer deformation angle or the inter-layer deformation angle curve.
Owner:KK TOPCON

OPGW lightning strike site polarization state waveform signal processing method

The invention discloses an OPGW lightning strike site polarization state waveform signal processing method. According to the method, a polarization demodulation device is adopted to acquire OPGW lightning strike site polarization state signals, and a wavelet denoising method is adopted to perform denoising preprocessing on sampling signals, so that wavelet denoised polarization state signals x(t)can be obtained; EMD decomposition is performed on the signals x(t), an equation described in the descriptions in the invention is obtained, rn in the equation is called a residual function, and ci inthe equation is the i-th component of the signals x(t) that satisfies an IMF condition; HHT (Hilbert-Huang) transformation is performed on each intrinsic mode function ci(t) of the polarization statesignals, and then analytical signals are constructed, and a lightning strike point can be accurately located on the basis of optical polarization state signals extracted by the final Hilbert-Huang transformation; and therefore, the problem of low accuracy of the analysis and processing of optical polarization state signals in an OPGW in the prior art can be solved, and the problem of inaccurate fault location caused by the low accuracy, and other problems can be also solved.
Owner:GUIZHOU POWER GRID CO LTD

Arteriosclerosis inspecting apparatus

An arteriosclerosis inspecting apparatus including an information obtaining device which obtains information that is related to a velocity at which a pulse wave propagates in a living subject, a blood-pressure measuring device which measures a blood pressure of the subject, a heart-rate measuring device which measures a heart rate of the subject, a pre-ejection-period measuring device which measures a pre-ejection period from a time of starting of contraction of the heart of the subject to a time of starting of ejection of blood from the heart, an ejection-time measuring device which measures an ejection time from the time of starting of ejection of blood from the heart to a time of ending of ejection of blood from the heart, and an arteriosclerosis-inspection-related-augmentation-index determining means for determining an arteriosclerosis-inspection-related augmentation index of the subject, based on the obtained pulse-wave-velocity-related information, the measured blood pressure, the measured heart rate, the measured pre-ejection period, and the measured ejection time, according to a predetermined relationship between (A) (a1) pulse-wave-velocity-related information, (a2) blood pressure, (a3) heart rate, (a4) pre-ejection period and (a5) ejection time, and (B) arteriosclerosis-inspection-related augmentation index.
Owner:COLIN MEDICAL TECH

Failure diagnosis method for reducing agent addition valve

An object of the invention is to diagnose a failure of an addition valve provided in the exhaust system of an internal combustion engine. To achieve the object, post injection through a fuel injection valve of the internal combustion engine and reducing agent addition through the reducing agent addition valve are performed at different timings, the quantity of fuel injected through the fuel injection valve when the post injection is performed and the quantity of reducing agent added through the reducing agent addition valve when the reducing agent addition is performed are estimated based on a same parameter, and it is diagnosed that the reducing agent addition valve has a failure on condition that the difference between the estimated fuel quantity and the estimated reducing agent quantity exceeds a predetermined quantity.
Owner:TOYOTA JIDOSHA KK +1

Internal abnormality diagnosis method, internal abnormality diagnosis system, and decision tree generation method for internal abnormality diagnosis of oil-filled electric apparatus utilizing gas concentration in oil

An object is to provide an internal abnormality diagnosis method, an internal abnormality diagnosis system and a decision tree generation method for internal abnormality diagnosis of an oil-filled electric apparatus utilizing gas concentration in oil and having a diagnostic accuracy equal to or higher than that of a diagnostic specialist having reached a certain level. The present invention provides a method for generating a decision tree for determining the type of an internal abnormality of an oil-filled electric apparatus using a computer. In the decision tree generation method, the computer generates a standardized data group by converting concentrations of a plurality of gas species dissolved in an insulating oil in an oil-filled electric apparatus into ratios for each abnormality case, generates a discretized data group by converting the ratios of the concentrations of the gas species, the ratios constituting the standardized data group, into a plurality of discretized attributes using predetermined thresholds which are set for the respective gas species, and generates a decision tree for determining the type of an internal abnormality of the oil-filled electric apparatus by analysis using specific formulae on the basis of the discretized data group.
Owner:KANDEN ENG

Power supply unit for aerosol suction device and power supply diagnosis method of aerosol suction device

A power supply unit for an aerosol suction device includes: a power supply capable of discharging to a load for generating an aerosol from an aerosol generation source; and a controller capable of controlling charging and discharging of the power supply. The controller is capable of operating in a charging mode for controlling charging of the power supply, a first mode different from the charging mode, and a second mode different from the charging mode and the first mode, and is capable of executing diagnosis processes of the power supply in each of the first mode and the second mode.
Owner:JAPAN TOBACCO INC

Gear case fault detection method based on deep transfer learning

The invention provides a gearbox fault detection method based on deep transfer learning, and the method comprises the steps: collecting original signal data of a gearbox, carrying out the noise reduction and data cleaning of an original signal, carrying out the extraction through a feature extractor, obtaining a new image, building a model, and carrying out the result analysis and verification of the model through training data and verification data. According to the method, the technical problem that the type of gearbox fault diagnosis is single is solved, the image data of the vibration signals, the temperature signals and the oil liquid signals of the gearbox are innovatively combined in a crossed mode, multiple sets of composite image data are obtained, a composite fault model is finally constructed, and the fault diagnosis accuracy is improved. The obtained convolutional neural network model is migrated to gearbox diagnosis detection data, the migration diagnosis fault rate is calculated, the diagnosis rate is 94%-100%, high-precision diagnosis is achieved, and rapid fault detection of the gearbox under the composite fault condition is achieved.
Owner:XIAN TECHNOLOGICAL UNIV

Heart failure diagnostic device

Provided is a novel heart failure diagnostic device capable of performing high-precision diagnosis of heart failure based on respiratory stability on the basis of the detection results of a flexible piezoelectric sensor sheet that does not need to be worn on a user. A heart failure diagnostic device (10) diagnoses heart failure using an index generated on the basis of the standard deviation of the respiratory rate of a user (P), the heart failure diagnostic device (10) comprising: a flexible piezoelectric sensor sheet (12) that outputs a detection signal in accordance with input vibration; a respiration signal acquisition unit (40) that extracts, as a respiration signal, a signal of a vibration frequency caused by respiration from a detection signal of the piezoelectric sensor sheet (12); and a power spectrum calculation unit (44) that calculates the power spectrum of the respiratory band on the basis of the respiratory signal, the heart failure diagnosis device (10) being provided with a signal correction unit (12). And a signal correction unit (12) that corrects the detection signal so that the maximum value of the primary frequency component of the respiratory waveform in the power spectrum is 1.5 times or more of the maximum value of the secondary frequency component of the respiratory waveform, thereby forming the respiratory signal.
Owner:SUMITOMO RIKO CO LTD +1
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