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2results about How to "Improve calibration reliability" patented technology

Method and device for on-line self-checking of gas-insulated switchgear ultrasonic sensor

PendingCN122194038AAchieve high-precision quantitative assessmentImprove calibration reliabilityElectrical measurements
The application relates to an online self-checking method and device for an ultrasonic sensor of a gas insulated switchgear, and belongs to the technical field of power equipment state monitoring. The method comprises the following steps: recording the arrival time of the same partial discharge pulse at a built-in ultrahigh frequency sensor and an external ultrasonic sensor, extracting the arrival time difference, obtaining the spatial propagation distance from the partial discharge point to the external ultrasonic sensor according to the arrival time difference; constructing a sound intensity transmission and interface reflection model to obtain a sound pressure transmission coefficient; based on the spatial propagation distance and the sound pressure transmission coefficient, a diffusion and absorption attenuation equation of spherical sound waves in viscous fluid is constructed to calculate a theoretical sound pressure; according to the actual output voltage peak value and the theoretical sound pressure, the sound-electricity conversion sensitivity of the external ultrasonic sensor is calculated to generate an online self-checking result. The method is beneficial to non-invasively evaluating the performance degradation of the ultrasonic sensor online, and significantly improves the precision and reliability of the field calibration.
Method and device for on-line self-checking of gas-insulated switchgear ultrasonic sensor
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Owner:CHINA UNIV OF MINING & TECH

A floor laying auxiliary device

PendingCN122082560AEven by forcePrevent placement deviationBuilding constructionsCleaning using gasesClassical mechanicsMechanical engineering
This invention belongs to the field of floor tile laying technology, specifically a floor laying auxiliary device, including an electric suction cup. A support rail is mounted on the outer arc surface of the electric suction cup, and two sliding seats are slidably connected within the support rail. A telescopic calibration component is mounted outside the sliding seats. This design is suitable for center positioning of both square and hexagonal floor tiles, and has the following outstanding advantages: By adjusting the angle of the sliding seats and ensuring they fit against the side of the telescopic calibration component, the electric suction cup is always positioned in the center of the floor tile, solving the problem of deviations easily caused by manual visual alignment; because the electric suction cup is located in the center of the floor tile, the floor tile is subjected to uniform force during suction and lifting, making it less prone to tilting or shaking, effectively preventing the floor tile from shifting during transfer; the suction is stable and the positioning is accurate, avoiding floor tile placement deviations caused by suction cup misalignment, significantly improving the accuracy of tile placement and construction efficiency.
A floor laying auxiliary device
A floor laying auxiliary device
A floor laying auxiliary device
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Owner:杭州良工装饰有限公司

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Rapid positioning precise positioning Improve construction efficiency Flexible angle adjustment Prevent deviation fit tightly Reduce the difficulty of operation reduce impact High positioning accuracy Improve ease of use