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38 results about "Abnormal test result" patented technology

A positive test is one in which the result of the test is abnormal; a negative test is one in which the test’s result is normal. A problem with this way of teaching about the value of test results is that often physicians and patients think there are only two possible test results, normal or not.

Method for diagnosing impact on metallic oxide arrester electrification test from inter-phase interference

The invention discloses a method for diagnosing an impact on a metallic oxide arrester electrification test from inter-phase interference. The method includes: acquiring instantaneous voltage values at various sampling times from leads on high-voltages sides of an A-phase metallic oxide arrester and a C-phase metallic oxide arrester, calculating phase angles of instantaneous voltage via the Fourier algorithm, acquiring instantaneous leakage current values at various sampling times from grounding down leads of the A-phase metallic oxide arrester and the C-phase metallic oxide arrester, separating resistive current from instantaneous leakage current, calculating a phase angle of the resistive current via the Fourier algorithm, calculating an interference coefficient, and diagnosing by comparing the interference coefficient with a setting valve. By the method, the impact on the metallic oxide arrester electrification test from the inter-phase interference is accurately diagnosed, if any inter-phase interference leads a metallic oxide arrester electrification test result to be abnormal, the diagnosing result can provide powerful reference to testing workers for accurately analyzing insulating performance of the metallic oxide arresters, and testing workers' judgment error caused by the abnormal testing result due to the inter-phase interference can be effectively avoided.
Owner:STATE GRID FUJIAN ELECTRIC POWER CO LTD +2

Wireless signal interference monitoring method, system and device

InactiveCN108599879ASolve the real-time monitoringSolve analysisTransmission monitoringWireless communicationFrequency spectrumCenter frequency
The invention discloses a wireless signal interference monitoring method, system and device, and the method comprises the steps: receiving a radio frequency signal through a high-gain full-band antenna; dividing the radio frequency signal into a plurality of narrow band signals corresponding to the pass bands of band-pass filters through the band-pass filters, wherein the central frequencies of the band-pass filter are uniformly distributed from the low to the high, and are in pass-band seamless connection; generating corresponding narrow band spectrum data after I/Q signal conversion, FFT processing and time identification processing, synthesizing the data to form a full-band spectrum, and storing the full-band spectrum in a computer platform. When there is a testing result abnormality ina production testing process, the corresponding spectrum data is extracted according to the testing time, and is used for the backspacing analysis of the signal interference during testing. The method achieves the real-time monitoring and analysis of the interference signal through the full-band spectrum formed by the synthesizing of the narrow band spectrums, effectively solves a problem of real-time monitoring and analysis of an interference signal in a production line test in real time, improves the accuracy of a testing result, and reduces the production cost.
Owner:北京为准智能科技有限公司

Method for automatically detecting defects of dynamic logo

The invention discloses a method for automatically detecting defects of a dynamic logo. The method comprises that following steps that: step one, a to-be-detected prototype is electrified and a dynamic logo is played; step two, according to a frame rate of dynamic logo playing, a camera is set to be at a corresponding frame rate to carry out image information collection and storage; and step three, the stored image information is read and frame-by-frame analysis is carried out on the collected image; to be specific, the image analysis includes: reading the image and acquiring a colour gamut ofthe image; distinguishing the image type being one of a non-logo image, a dynamic logo image, and a static logo image based on the colour gamut proportion; analyzing the colour gamut of the image, carrying out color gamut difference comparison to determine a result; to be specific, carrying out image stuck defect analysis and splash screen defect analysis on a dynamic logo image and then carryingout splash screen defect analysis on the static logo image; and then returning a test result and storing correspondingly collected image information in an abnormal state of the test result. Therefore, automatic detection of the dynamic logo is realized; the product quality is guaranteed; and the test efficiency is improved.
Owner:HUIZHOU DESAY SV INTELLIGENT TRANSPORTATION TECH INST CO LTD

Diagnosis method for the influence of interphase interference on the live test of metal oxide arresters

The invention discloses a method for diagnosing an impact on a metallic oxide arrester electrification test from inter-phase interference. The method includes: acquiring instantaneous voltage values at various sampling times from leads on high-voltages sides of an A-phase metallic oxide arrester and a C-phase metallic oxide arrester, calculating phase angles of instantaneous voltage via the Fourier algorithm, acquiring instantaneous leakage current values at various sampling times from grounding down leads of the A-phase metallic oxide arrester and the C-phase metallic oxide arrester, separating resistive current from instantaneous leakage current, calculating a phase angle of the resistive current via the Fourier algorithm, calculating an interference coefficient, and diagnosing by comparing the interference coefficient with a setting valve. By the method, the impact on the metallic oxide arrester electrification test from the inter-phase interference is accurately diagnosed, if any inter-phase interference leads a metallic oxide arrester electrification test result to be abnormal, the diagnosing result can provide powerful reference to testing workers for accurately analyzing insulating performance of the metallic oxide arresters, and testing workers' judgment error caused by the abnormal testing result due to the inter-phase interference can be effectively avoided.
Owner:STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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