8results about "Material analysis by observing immersed bodies" patented technology

The utility model relates to engineering test technical field, concretely is a kind of asphalt mixture slab test piece density testing device, including water injection tank, the front and back side wall of water injection tank is equipped with observation port, and observation port is provided with transparent plate;The outer surface of front side transparent plate is equipped with outside scale rule;The inside of rear side transparent plate is equipped with the inside water level ruler of vertical extension;Inside water level ruler is equipped with vertical sliding rail side, and the sliding block of vertical sliding is configured on sliding rail;Sliding block is connected with the suspension piece that can float on water surface, and suspension piece one end is equipped with the pointer of inside water level ruler direction.This utility model's beneficial effect lies in by the transparent plate (observation port) of being set up in front and back, allow direct observation water level change, avoid the cumbersome operation of traditional overflow collection;It is simultaneously provided with double scale rule of inside and outside to provide double reference, reduce visual error, and suspension piece is driven pointer along with water level rise and fall, directly indicate water level height on inside water level ruler, greatly simplify reading process and reduce artificial error.

This invention relates to the field of rock mechanics and intelligent detection technology, specifically a method and system for predicting rock strength and failure modes. The method includes: obtaining a multi-source feature set based on data acquisition from a rock sample; constructing a feature coefficient prediction model, inputting the multi-source feature set into the feature coefficient prediction model to obtain feature coefficients; filtering the multi-source feature set based on the feature coefficients to obtain an optimal feature subset; constructing a rock strength and failure mode prediction model, and optimizing the hyperparameters of the rock strength and failure mode prediction model using an automated hyperparameter optimization framework; inputting the optimal feature subset into the optimized rock strength and failure mode prediction model to obtain the predicted rock strength value and failure mode. This invention solves the problems of insufficient accuracy and inability to predict rock strength and failure modes simultaneously in existing technologies. Through multi-source data collaborative prediction, the accuracy of the prediction is greatly improved.

A simulated lunar soil inspection method for construction research. The method comprises: determining a particle size distribution parameter of a simulated lunar soil sample, and calculating a particle size distribution parameter similarity between the simulated lunar soil sample and real lunar soil; determining a mineral composition parameter of the simulated lunar soil sample, and calculating a mineral composition parameter similarity between the simulated lunar soil sample and the real lunar soil; determining a particle shape parameter of the simulated lunar soil sample, and calculating a particle shape parameter similarity between the simulated lunar soil sample and the real lunar soil; determining a density parameter of the simulated lunar soil sample, and calculating a density parameter similarity between the simulated lunar soil sample and the real lunar soil; and when the particle size distribution parameter similarity, the mineral composition parameter similarity, the particle shape parameter similarity and the density parameter similarity all exceed corresponding thresholds, the simulated lunar soil sample passing the inspection.

A liquid level sensing module, a non-transitory computer readable medium, and an equipment enclosure are provided. The liquid level sensing module has an equipment enclosure that houses an electronic equipment. The liquid level sensing module includes a liquid level sensor and a controller coupled to the liquid level sensor and configured to: receive a signal from the liquid level sensor indicative of a height of a dielectric liquid in the equipment enclosure; receive a signal from a pump controller indicative of a volume of dielectric liquid provided to the equipment enclosure; and generate a dielectric liquid volume map within the equipment enclosure from the signal from the liquid level sensor and the signal of the pump controller. The present invention is capable of overcoming at least one drawback of the prior art.

Provided is a downhole tool and a well system. The downhole tool, in one aspect, includes a tubular providing one or more production fluid flow paths for a production fluid. The downhole tool, according to this aspect, further includes one or more float chambers located within the tubular, and two or more floats located within the one or more float chambers. In one aspect, a first of the two or more floats has a first density (ρ1) between a density of gas (ρg) and a density of oil (ρo), and a second of the two or more floats has a second density (ρ2) between the density of oil (ρo) and a density of water (ρw). The downhole tool, according to this aspect, further includes two or more non-contact proximity sensors configured to sense a radial location of the two or more floats to determine a gas:oil ratio and oil:water ratio.

The application discloses a float ball type specific gravity measuring instrument, and relates to the technical field of specific gravity measuring instruments, which comprises a specific gravity measuring installation flange. The device is characterized in that the buoyancy of the float makes the bending force rod move, drives the connected bending force spring steel plate to deform and is transmitted to the strain gauge set, the resistance change generated by the deformation of the strain gauge set is converted into a voltage signal through a bridge, and the corresponding density value after calibration is used to complete the measurement. The float is located in the measuring tube. When the liquid in the reactor body fills the measuring tube and completely submerges the float, the float is affected by the buoyancy, drives the bending force rod to move, and drives the bending force spring steel plate to move through the connecting piece. Since the other end of the bending force spring steel plate is fixed by the supporting structure, the bending force spring steel plate deforms. The strain gauge set detects the strain (tensile or compressive deformation) on the surface of the bending force spring steel plate, can accurately measure the slight deformation, converts the resistance change of the strain gauge set into a voltage signal, and further amplifies and digitizes the voltage signal, so that the quantitative measurement of the density is realized.

Fluid property sensors described herein may include a resonator configured to be immersed in a fluid or flowable medium and a vibrator coupled to the resonator, such that vibrations of the vibrator are transmitted to the resonator, e.g., to discourage and / or remove any buildup or deposits on the resonator and / or increase accuracy of the sensors. The frequency of the vibrator is configured to be substantially lower than the frequency of the resonator, such that operation of the resonator is not negatively affected. The vibrator may be located internal to, or external to, a chassis of the device.