18results about How to "Reduce technical risk" patented technology

The invention discloses a vibration noise test bench for vibration and noise reduction design of an underwater vehicle, which comprises a water tank assembly, a simulated underwater vehicle and a noise test sensor, tested damping measures are arranged in the simulated underwater vehicle, the simulated underwater vehicle is fixedly arranged in the water tank assembly, and the noise test sensor is arranged in the simulated underwater vehicle. The noise test sensor is arranged in the water tank assembly, and water is injected into the water tank assembly and submerges the simulated underwater vehicle. The method aims to reduce technical risks for project development, shorten the development period, reduce the development cost and refine the design process while design and product research and development of an underwater vehicle damping system are carried out. Meanwhile, a certain design reference and technical basis are provided for solving the engineering problem of the type.

The utility model provides a kind of double-channel cutterhead main shaft structure's slurry pipe jacking boring machine, by excavator shell, main shaft seat, cutterhead and cutterhead main shaft constitute, the excavator shell is cylindrical structure, tail end outer edge is equipped with the socket mouth of socket pipeline, the main shaft seat is set in excavator shell second half, excavator shell first half is slurry tank;The cutterhead is set in excavator shell front end;Cutterhead main shaft rear end is set on main shaft seat, front end is connected with cutterhead;The earth-facing surface of the cutterhead is equipped with several hard alloy cutter blocks;Cutterhead main shaft adopts large diameter double-wall structure, is composed of outer shaft and core pipe, outer shaft front end is connected with cutterhead, is responsible for driving cutterhead rotation;The front end of core pipe is closed, fixedly arranged at the axis of outer shaft, the internal space of outer shaft is divided into core pipe hole and double-wall sandwich between core pipe outer wall and outer shaft inner wall two passages;The utility model structure is extremely simple, and technical risk is greatly reduced.

The application discloses a ranging method and system, wherein the method comprises the following steps: acquiring a ranging image; acquiring a contour in the ranging image, determining a plurality of positioning points according to the contour, and obtaining a positioning point cluster; determining a two-dimensional code in the ranging image according to the positioning point cluster; determining a three-dimensional coordinate of the two-dimensional code in a camera coordinate system according to the two-dimensional code and an internal parameter matrix and a distortion matrix of the camera; converting the three-dimensional coordinate of the two-dimensional code to a world coordinate system, and determining a vertical distance from the two-dimensional code to a plane formed by an xy axis group of an origin of the world coordinate system. The method has the advantages of high ranging accuracy, simple method, fast calculation speed and wide application range. The system has the advantages of low ranging cost, low cost and low technical risk, and can provide accurate ranging with low error.

The invention provides an offshore photovoltaic support foundation construction method, and relates to the field of offshore photovoltaic technologies. The construction method comprises the steps that a pile driving barge and a pile foundation are transported to a first to-be-laid area of the sea surface, the pile driving barge comprises a lifting device, the lifting device comprises a first rigging and a second rigging, and the pile foundation comprises a column body, a first lifting lug arranged at the first end of the column body and a second lifting lug arranged at the second end of the column body; the first rigging is connected with the first lifting lug, and the second rigging is connected with the second lifting lug; the first rigging and the second rigging are lifted to lift the pile foundation to a preset position; the first rigging is lifted, and the second rigging is lowered, so that a preset angle is formed between the pile foundation and the sea surface; and the pile foundation is lowered through the first rigging, so that the pile foundation goes deep into a seabed mud layer corresponding to the first to-be-laid area. According to the construction method, the mounting difficulty of the pile foundation can be reduced, and the mounting efficiency and the mounting stability are improved.

The application provides a pre-tailings discarding mode distinguishing method based on useful mineral dissemination characteristics, and relates to the field of mineral processing. The pre-tailings discarding mode distinguishing method based on useful mineral dissemination characteristics comprises the following steps: preparing a plurality of optical sections from an ore sample; analyzing the optical sections by using an optical microscope and an image analysis technology, and classifying the dissemination characteristics of useful minerals in the optical sections; calculating the average occupancy of local enrichment type in all optical sections, the average occupancy of vein type in all optical sections, and calculating a pre-enrichment proportion Pvalid; comparing the pre-enrichment proportion with a preset threshold value, and if Pvalid is greater than or equal to the preset threshold value, it is determined that the ore sample is suitable for pre-enrichment by using a pre-tailings discarding process. The prediction conclusion of the method of the application is highly consistent with actual industrial test and production data, has the advantage of high accuracy, solves the problem that the pre-discarding effect can only be detected by test, and is beneficial to improving work efficiency and reducing cost.

This invention discloses a method for encoding structured light patterns, a structured light projection module, and a three-dimensional measurement system, belonging to the field of optical measurement. Addressing the problem of fixed and inaccurate structured light encoding units in existing methods, this invention provides a method for encoding structured light patterns. The method divides the structured light pattern into multiple types of grid units, forming a grid encoding group with a predetermined number of consecutively arranged grid units. The grid encoding group is encoded based on the type of each grid unit, ensuring that each grid encoding group has a unique and non-repeating code. The code of the grid encoding group maps to its spatial position within the structured light pattern. Decoding includes acquiring the structured light pattern, determining the type of each grid unit, and matching the grid encoding group with the encoding set to obtain its position. This invention achieves flexible, high-density, and highly occlusion-resistant absolute position encoding by uniquely and non-repeating grid encoding groups composed of multiple consecutive grid units, making it suitable for high-precision three-dimensional measurement.

The utility model belongs to the field of food processing machinery, and relates to mechanical preserved szechuan pickle rubber band removing equipment which comprises a preserved szechuan pickle feeding port, a water flow inlet, a guide cylinder, a self-vibration motor, a sliding groove, a clamping feeding cylinder, a cutter spoke wheel, a cutter component, a cutter profiling device, a special-shaped rubber belt and a rotary cutter head. The equipment accurately simulates a manual tendon watching method, so that the technical risk is small; the directional conveying of the preserved szechuan pickles is efficiently realized through a water flow and natural vibration motor combination mode; the small belt type conveying mechanism with a four-side structure can realize flexible pressure conveying of the special-shaped preserved szechuan pickles; the cutter profiling device can cut preserved szechuan pickles of different sizes, the labor intensity can be greatly reduced, the working efficiency is improved, and the development of the preserved szechuan pickle industry is promoted.

The invention relates to the technical field of battery management, and discloses a BMS active equalization circuit and a working method thereof, in the circuit, each multi-winding transformer corresponds to two transformer selection switch groups which are respectively connected to two ends of a winding; each battery pack corresponds to two degree-of-freedom switch modules; in the battery pack, all the battery cell switch modules connected with the positive electrodes of the single battery cells are connected to one degree-of-freedom switch module, and all the battery cell switch modules connected with the negative electrodes of the single battery cells are connected to the other degree-of-freedom switch module; the two degree-of-freedom switch modules are respectively connected with the two transformer selection switch groups in a one-to-one correspondence manner; in the control module, an AFE chip collects a voltage signal of each single cell, and a main control chip controls on-off of each switch module. According to the invention, the cost and technical risk are reduced while functions are improved, random combination of adjacent battery cells can be realized, the charging and discharging balance freedom degree is increased, the number of transformers is reduced, and high cost performance is realized.

The invention discloses a method for separating iron and scandium from cobalt-nickel hydroxide raw materials, and relates to the technical field of hydrometallurgy. According to the method, nickel and cobalt are reduced and leached with a proper amount of hydrogen peroxide under the acidic condition, the pH value of feed liquid is adjusted after the reaction is finished, and iron and scandium are co-precipitated to form mixed slag to be separated out; the mixed slag is completely dissolved with sulfuric acid and an oxidizing agent, the solution is pumped into a high-pressure kettle, ferrous iron in the solution is converted into insoluble hydrated iron oxide red under the action of certain oxygen atmosphere pressure and temperature, scandium is still left in the solution, at the moment, the pH value of the solution is adjusted, and then pure scandium hydroxide is precipitated; the method has the characteristics that the trace scandium element is effectively separated from the cobalt-nickel hydroxide raw material to the greatest extent by adopting a simple process and equipment, and meanwhile, the impurity iron is converted into an iron oxide red material commonly used in the building material industry.

This invention discloses an automated reference volumetric measurement system and method for performance evaluation of a water electrolysis hydrogen production system, relating to the field of gas flow metering and performance testing. The system includes: a main inlet pipe, a main outlet pipe, multiple reference measurement units connected in parallel between the two, an intelligent fluid switching matrix for controlling gas flow and direction, and a controller electrically connected to the reference measurement units and the intelligent fluid switching matrix. The reference measurement units are used to collect temperature-time series data and pressure-time series data in real time. The controller controls the valves in the intelligent fluid switching matrix to operate according to a predetermined sequence, enabling the multiple reference measurement units to perform cyclic relay volumetric measurements within the evaluation period. The average flow rate within the evaluation period is calculated based on the temperature-time series data and pressure-time series data collected by each reference measurement unit in each cycle. This invention enables automated, high-precision measurement in high-flow-rate scenarios.

The present application relates to the technical field of finite element simulation analysis, and specifically discloses a large bearing capacity earthquake-temperature self-adaptive viscous damper and a simulation calculation method, which comprises the following steps: S1: establishing a three-dimensional solid model of a temperature deformation joint and a viscous damper with a stiffness adjusting valve; S2: obtaining a finite element model of the three-dimensional solid model; S3: obtaining a critical speed and a load working condition speed of the viscous damper, and establishing a multi-state self-adaptive stiffness adjusting model of the viscous damper based on the ratio of the load working condition speed to the critical speed; S4: obtaining a time difference value of the stiffness adjusting valve from the start of closing to the complete closing, and establishing a virtual displacement quantification model; S5: adding the multi-state self-adaptive stiffness adjusting model and the virtual displacement quantification model to the finite element model; and S6: performing mechanical simulation analysis on the finite element model. The present application can accurately simulate the complex mechanical behavior of the damper under the conditions of multi-state switching, virtual displacement effect and bidirectional earthquake reciprocating action.

The invention relates to an electric heating ring integrated system of a manned moon scientific research test station, which realizes the integrated design of a power supply and distribution function, a heat management function and an environment control function in the manned moon scientific research test station, realizes the efficient cyclic utilization of energy and substances, and belongs to the field of aerospace engineering. The invention discloses an electric heating ring integrated system of a manned lunar scientific research test station. Efficient cyclic utilization of material flow and energy flow is achieved through the integrated design of electricity, heat and a ring. In the moon day period, power is generated through the solar wing power generation equipment, and water is electrolyzed to generate hydrogen and oxygen to store energy; during the moon night, the fuel cell reactor uses hydrogen and oxygen to generate power, and waste heat is recovered for heating in the cabin during the moon night; during the month day, water is decomposed into hydrogen and oxygen to realize energy storage, and during the month night, the hydrogen and the oxygen generate electric energy through the fuel cell reactor and are reduced into water, so that water recycling is realized.

The invention relates to a high-pressure liquid oxygen flow rapid adjusting system controlled by a cavitation pipe matrix. The high-pressure liquid oxygen flow rapid adjusting system is used for a large air suction type scramjet engine test. Aiming at the characteristics of low temperature, high pressure, multiple working conditions and high flow control precision of a heater oxygenating system, the invention provides a high-pressure liquid oxygen flow rapid adjusting system controlled by adopting a cavitation pipe matrix, and various flow changes and high precision requirements are realized by the cavitation pipe matrix. The system is composed of a liquid oxygen container, a pressure reducer, a valve, a flow meter, a cavitation pipe, a temperature sensor, a pressure sensor, a pipeline and the like, and the functions of filling, pressurizing, flow adjusting, oxygen supplementing and the like can be independently achieved. According to the oxygenating working condition, the system is flexibly combined, and the flow is flexibly distributed. The container is directly pressurized through the pressure reducer, the pressure of the container is accurately controlled and stabilized, the pressurization flow range is covered, and the pressurization reliability is considered. The liquid oxygen flow is controlled through the cavitation pipes, liquid oxygen flow adjustment under different working conditions is met through combination and parallel connection, the flow is not interfered by downstream pressure fluctuation, and high-precision flow control is achieved. Experiments prove that the working pressure of liquid oxygen of the high-pressure liquid oxygen supply system controlled by the cavitation pipe matrix reaches 30 MPa, large-range flow adjustment can be achieved, the flow control precision is higher than 1%, oxygen supplementation of dozens of test working conditions within the flow envelope range can be achieved, the system works stably, the performance is reliable, and the good using effect is achieved.

The invention discloses a water-turbine generator set updating transformation and evaluation method, and relates to the technical field of water-turbine generator sets. According to the method, starting from power station and unit parameter collection, the transformation range is preliminarily judged in combination with maintenance, operation and vibration throw data, then core analysis is carried out on whether a runner is transformed or not, the power generation potential improvement requirement, the capacity increasing target and scheme determination, and technical feasibility is verified through CFD simulation and model tests; and rechecking the adaptability of the auxiliary system, the electrical equipment and the basic structure, and finally combining investment estimation and economic evaluation to output a decision basis. According to the method, the whole transformation process is covered, the technical rationality and economic benefits are considered, the transformation range can be accurately defined, the problems of efficiency attenuation of old units, insufficient adaptive power grid capacity and the like are solved, scientific support is provided for power station transformation decision making, and reference is provided for similar projects.

This invention relates to the field of electronic component packaging, specifically to a packaging cap with an internal metal ring, a hermetic packaging shell, its preparation method, and hermetic packaging. The cap is mounted on a circuit board and is used to cooperate with leads, glass insulators, and a cap to form a hermetic package of the electronic device. The size of the cap is adapted to the electronic device to be packaged. On the inner side of the cap, there is a cavity structure protruding outwards to accommodate the glass insulator. The cap also includes a flat flash integrally formed around the edge of the cavity structure, with the bottom surface of the flash parallel to the surface of the circuit board used for packaging to ensure a close fit. Inside the cavity structure, there is a metal ring of the same height as the cavity structure. A through hole for inserting leads is provided inside the metal ring on the cap. This invention, by setting the metal ring, ensures a regular shape of the glass insulation structure after fusion sealing, avoiding stress concentration in the glass, thereby solving the problems of cracking and chipping of the glass after fusion sealing.

The invention provides a method for judging a tailing pre-discarding mode based on dissemination characteristics of useful minerals, and relates to the field of mineral processing. The method for judging the tailing pre-discarding mode based on the dissemination characteristics of the useful minerals comprises the following steps: preparing a raw ore sample into a plurality of polished sections; analyzing the X-ray plate by using an optical microscope and an image analysis technology, and classifying the dissemination characteristics of useful minerals in the X-ray plate; calculating the average occupancy of local enrichment types in all the polished sections and the average occupancy of pulse types in all the polished sections, and calculating a pre-enrichment ratio Pvalid; and comparing the pre-enrichment proportion with a preset threshold value, and if the Pvalid is greater than or equal to the preset threshold value, judging that the raw ore sample is suitable for pre-enrichment by adopting a pre-tailing-discarding process. The prediction conclusion of the method is highly matched with the actual industrial test and production data, the method has the advantage of high accuracy, the problem that the pre-polishing effect can only be detected through the test is solved, the working efficiency is improved, and the cost is reduced.

The invention relates to a shale fluid occurrence state, in particular to a continental facies shale full-size pore fluid occurrence state quantitative characterization method which comprises the following steps: acquiring real-time density of hydrocarbon fluid at sampling points in pores to obtain density distribution data; respectively calculating the average density of a single-layer adsorption phase, the average density of the adsorption phase and the average density of a free phase in the pores; calculating the adsorption quantity according to the adsorption quantity per unit area, obtaining the number of adsorption layers, calculating the thickness of the adsorption layers according to the number of the adsorption layers, and calculating the free quantity according to the adsorption quantity per unit area and the thickness of the adsorption layers; calculating an adsorption mass ratio according to the adsorption quantity and the free quantity, and calculating an adsorption volume ratio according to the adsorption mass ratio, the average density of the adsorption phase and the average density of the free phase; utilizing a high-pressure mercury injection experiment and a nuclear magnetic resonance experiment to obtain a core dimension pore size distribution result; therefore, the adsorption state and the free state of the hydrocarbon fluid in the pores are analyzed. And the resource quantity of the hydrocarbon fluid in the shale can be evaluated more accurately.

The application relates to a PET system, a coincidence processing method and a chip. The PET system comprises a plurality of detector rings and a coincidence processing board card, each of the detector rings comprises a plurality of detection units, the plurality of detector rings are arranged side by side along an axial direction to form a containing cavity; the coincidence processing board card is connected with the plurality of detector rings; the coincidence processing board card is used for receiving data of the plurality of detector rings, performing merging processing on data of detection units with the same index on the plurality of detector rings to obtain a plurality of merged detection data, and performing coincidence processing on the plurality of merged detection data to obtain coincidence data. The PET system provided by the application can reduce the coincidence resource overhead of the coincidence processing board card.