4results about How to "Simple implementation steps" patented technology

This invention provides a method for measuring the radiation of a display field, enabling the measurement of hyperspectral information of a display screen under test. Specifically, the method includes: S1: controlling the display screen under test to display a first set of images, and using the spectral measurement device to obtain the spectral power distribution of region A of the display screen under test under the corresponding image; S2: selecting two or more specific filters based on the spectral power distribution of region A obtained in step S1; S3: controlling the display screen under test to display a second set of images, sequentially inserting the filters selected in step S2 into the optical path, and the light from region B of the display screen under test being received by an area array sensor through an imaging lens and the filters; S4: calculating the spectral power distribution of each position point in region B of the display screen under test when displaying the second set of images, based on the pixel response value of the area array sensor in step S3 and the spectral power distribution of region A of the display screen under test in step S1.

This invention belongs to the technical field of nuclear power plant reactor pressure vessel maintenance, specifically relating to a device and method for disassembling and assembling the main nut of a reactor pressure vessel. The device includes: a support sleeve, a locking ring, inserts, and lifting hooks. Several lifting hooks are evenly connected along the lower outer periphery of the support sleeve, and these hooks can open and close relative to the support sleeve. The bottom of each lifting hook has an inwardly facing protrusion for hooking the main nut or a main nut washer. Several inserts are evenly connected to the bottom of the support sleeve, the shape of which matches the U-shaped groove on the main nut, for applying torque to the main nut during rotation. The locking ring is sleeved around the outer periphery of the lifting hooks for fixing them. This invention has a simple structure and is easy to operate, effectively improving work efficiency while ensuring that the lifting hooks will not open or close accidentally during operation, greatly reducing operational risks.

A method for strengthening methane in-situ combustion fracturing, liquid carbon dioxide is pressurized and heated to form supercritical carbon dioxide, which is then sent into the fracturing channel to form a complex fracture network around the fracturing channel; mixed fracturing fluid formed by mixing supercritical carbon dioxide and fly ash is injected into the well bottom; combustion-supporting agent is injected into the wellbore and mixed with the mixed fracturing fluid at the well bottom to enter the complex fracture network together, so that a multiphase mixed fluid is formed in the complex fracture network; the annulus valve is closed to promote mineralization reaction of supercritical carbon dioxide and fly ash under the temperature and pressure conditions of the reservoir, and to form high-strength minerals; the mineralization reaction is used to promote the desorption of methane in the reservoir and into the complex fracture network, so that methane-combustion-supporting agent mixed gas is formed in the complex fracture network; the combustion process is used to promote the dust cloud formed by the mixing of fly ash and gas in the complex fracture network, to strengthen the effect of methane in-situ combustion; and the fracturing reconstruction of all layers is completed. The fracturing effect of the method is ideal.

The invention discloses a capacitor voltage transformer fault identification method and system, and belongs to the technical field of power equipment monitoring. The method comprises the following steps: firstly, constructing a CVT broadband equivalent model containing distribution parameters and an n-type transformer topology; then extracting a composite characteristic parameter set fusing the broadband resonance characteristic and the power frequency electrical characteristic; establishing a mapping relation among the fault type, the damage depth and the characteristic parameters through simulation; and finally realizing non-intrusive accurate identification of the fault type and the damage depth of the CVT based on the mapping relation. According to the invention, through multi-dimensional feature fusion, the fault classification precision and the early fault detection capability are significantly improved, and the problems of operation risk and low efficiency of a traditional power failure test are avoided at the same time.