5 results about "Particle injection" patented technology

The application relates to a drag-reducing particle screening device and method based on a natural gas pipeline, and particularly relates to the technical field of gas drag reduction, which comprises an optical window short section arranged on the natural gas pipeline; the optical window short section is provided with a pulse laser and a high-speed CCD camera; a drag-reducing particle injection end is arranged at the upstream of the optical window short section, and a drag-reducing particle recovery end is arranged at the downstream of the optical window short section, taking the flowing direction of the natural gas as the reference; the pulse laser and the high-speed CCD camera are connected through a laser controller and a synchronization controller; and the high-speed CCD camera is connected with a data processing unit. The drag-reducing particle screening device provided by the application uses the active high-pressure natural gas pipeline as a real working condition test platform, carries out micro-particle gas-solid two-phase drag reduction test, and realizes efficient, reliable and rapid screening and test of micro-particle materials and key technical parameters under real working conditions only by using a small amount of test samples.

This invention provides an experimental system and method for measuring the migration and deposition behavior of low-density particles, belonging to the technical field of particle migration and deposition measurement research. It solves the problems of low-density particles struggling to stably enter a pipeline along a predetermined path and the easy confusion between bubble signals and particle signals. It includes a main loop, a Venturi addition branch, a pumping branch, a first venting branch, a second venting branch, and a visualization system. The main loop includes a storage tank, a main loop regulating valve, a circulating pump, a first pressure stabilizing chamber, a main loop ball valve, an experimental section, a second pressure stabilizing chamber, and a flow meter. The Venturi addition branch includes a Venturi particle addition device, a first addition branch ball valve, and a second addition branch ball valve. The Venturi particle addition device includes a Venturi tube and a feeding cylinder, with the feeding cylinder connected to the throat of the Venturi tube. A particle injection port and a solution injection port are located above the feeding cylinder. This system enables the injection of low-density particles and the observation of their migration and deposition behavior in the experimental section.

An equivalent fault injection method for simulating single-event soft errors (SEE) in integrated circuits is proposed. Based on the analysis of particle injection location distribution and fault introduction mechanism in ground accelerator tests, the analysis of the proportion of single-event sensitive areas in each unit circuit of the chip integration, and the quantity proportion analysis, the method provides support for determining the input conditions for chip-level SEE simulation through an equivalent fault injection sample set sampling method, thereby more accurately simulating the cross-section of SEE in integrated circuits caused by ground test particles.

A method for manufacturing ceramic matrix composites (CMC) and CMCs made by the method are disclosed. The method can be a manual process or an automated process, such as using a robotic system, that is used for controlled delivery of ceramic particles in a CMC fabric. The method includes identifying voids present between adjacent tows of the CMC fabric and dispensing ceramic particles into the voids. Applying the ceramic particles in the center of the voids reduces the size and volume fraction of the voids / defects, improving the homogeneity of surface texture of the preform, homogeneity of microstructure, and part model shape conformity. The method for manufacturing CMCs creates CMCs having a homogenous distribution of small pores after matrix formation that improves the interlaminar mechanical and thermal properties of the CMCs.

The application relates to a cavity surface detection method and system, a storage medium and an intelligent terminal, relates to the field of mold detection technology, and comprises the following steps: acquiring order information; after receiving the order information, placing a preset part model on a to-be-detected mold before die casting, and leaving a preset gap between the part model and the cavity surface of the to-be-detected mold, and pasting sealing pieces on both sides and the lower side of the gap; acquiring sand particle injection amount information; acquiring sand particle outflow amount information; comparing the sand particle injection amount information with preset gap volume information; if the sand particle injection amount information is greater than the preset gap volume information, cavity surface recess information is output; if the sand particle injection amount information is equal to the preset gap volume information, cavity surface normal information is output; and if the sand particle injection amount information is less than the preset gap volume information, cavity surface protrusion information is output. The application has the purpose of detecting before die casting through the injection amount of sand particles, the detection process does not need to be observed by people, the labor cost is saved, and the accuracy and efficiency of detection are improved.