4 results about "Size determination" patented technology

The invention belongs to the technical field of aeronautical equipment quality judgment, and particularly relates to a minimum sample size determination method and system for aeronautical equipment reliability assessment, and the method comprises the steps: S1, carrying out the normality test of the sample size data for aeronautical equipment reliability assessment, and determining the initial minimum sample size; s2, performing skewness detection on the sample size data for reliability evaluation of the aviation equipment; s3, correcting the minimum sample size of reliability evaluation of the aviation equipment according to the sample data skewness judgment parameters; and S4, determining the minimum sample size of aviation equipment reliability evaluation. And S5, carrying out reliability evaluation according to the minimum sample size for reliability evaluation of the aviation equipment finally determined in the step S4. The method provided by the invention has very high engineering value in a small sample scene with high sample acquisition cost and long period in aeronautical equipment development.

The application discloses a method and device for simulating the post-waving buckling deformation of a cold-rolled thin wide strip, and comprises the following steps: determining the size of a cold-rolled thin strip sample and the deformation area and size thereof, determining the base plate material and the initial heating final temperature based on the size of the deformation area, determining the size of the base plate, cutting the cold-rolled thin strip sample with good plate shape and drawing an original speckle pattern, performing original speckle quality evaluation, calibrating the original speckle based on the calibration plate after the quality is qualified, heating the base plate and the thin strip sample to the heating final temperature, bonding the connecting surface of the thin strip sample and the base plate through a rolling coating mechanism, observing and recording the data of the bonded thin strip sample through a high-speed camera, and determining the photographing trigger condition according to the temperature interval, and processing the recorded data. The obtained results can be used for the research on the elastic buckling theory and the plate shape control.

The invention relates to a sample treatment method and a method for measuring the granularity of lubricating oil through a shading method.The method comprises the steps that S1, an oil sample to be measured is placed in a closed container and then dried under the vacuum condition, and the treated oil sample to be measured is obtained; according to the method provided by the invention, the to-be-detected oil sample can be dehydrated and degassed at the same time before granularity determination, the trace moisture of the to-be-detected oil sample can be effectively reduced, and the influence of the trace moisture in the to-be-detected oil sample on the granularity determination is effectively avoided, so that the accuracy and stability of the granularity determination of the to-be-detected oil sample are further improved.

This invention relates to the field of testing technology for power oil, and discloses a fully automatic particle size determination device and method. The device includes multiple fixed functional stations set on a frame, including a sample station, a cover opening and closing unit, an ultrasonic treatment device, an outer wall cleaning unit, and a particle size analyzer. Each functional station is arranged in a loop-shaped flow path, and a robotic arm 3 is set on one side of the loop-shaped flow path area. The system completes the fully automated operation of a sample from pretreatment to detection and posttreatment.