10results about How to "Consider sensitivity" patented technology

The application relates to the technical field of gas concentration detection, in particular to a gas concentration detection method and system for a ring main unit; the method comprises the following steps: acquiring a concentration time sequence of a gas sensor in the ring main unit; constructing an instantaneous fluctuation coefficient; analyzing the instantaneous fluctuation coefficient and a gas physical diffusion limit rate constant to acquire an environmental interference factor representing the intensity of electromagnetic interference; acquiring an environmental interference curve, combining the environmental interference factor and an integral operation value of the environmental interference curve to acquire a dynamic adjustment parameter; obtaining a dynamic noise covariance for Kalman filtering; performing Kalman filtering processing on the concentration time sequence by using the dynamic noise covariance to obtain an optimal estimated gas concentration value. The problems of false alarms and missed detection in the gas concentration detection process are solved.

The invention belongs to the technical field of offshore wind power operation and maintenance and reliability engineering, and discloses an offshore wind turbine generator system-level health degree evaluation method based on dynamic weight distribution, and the method comprises the following steps: S1, collecting and preprocessing the multi-source data of an offshore wind turbine generator; s2, constructing a layered health degree evaluation index system; s3, fusing the mechanism model, the data driving model and the statistical reliability model, and constructing a subsystem degradation model to obtain a subsystem health degree; s4, performing weight fusion in combination with the static weight and the dynamic correction factor to obtain a dynamic weight; s5, fusing the subsystem health degree and the dynamic weight to obtain a system-level health degree; and S6, performing confidence interval sorting and risk grade division according to the system-level health degree. According to the evaluation method provided by the invention, through fusion of a mechanism model, a data driving model and a statistics model, the physical interpretability is reserved, the fitting capability of nonlinearity and coupling degradation is improved, and the misjudgment and missed judgment risks are reduced.

This invention discloses a wafer surface defect detection system and method based on a high-speed line scan camera, belonging to the field of wafer defect detection technology. It includes: an illumination system for providing adjustable bright-field illumination and illumination angle, and forming adjustable-size line spots on the wafer surface through a line spot generation device; a wafer scanning assembly including a stage for supporting the wafer and a displacement control assembly for driving the stage movement; an imaging system including a bright-field imaging assembly; a high-speed line scan camera for high-speed scanning and imaging of the signals collected by the imaging system, and balancing the signal-to-noise ratio, dynamic range, and detection resolution through a programmable pixel merging function; and a control system for coordinating and controlling the various system components and achieving parameter optimization and online adaptive calibration. This invention can achieve high-resolution, high-sensitivity wafer surface micro / nano defect detection while ensuring high detection speed.

An immunological analysis mode of a novel total antibody assay and a kit for detecting antibodies of infectious diseases in human blood samples according to the mode, the kit comprising: a first reagent containing at least one antigen coated on a solid support and an anti-human IgM antibody coated on a solid support; and a second reagent containing at least one labeled antigen and a labeled anti-human IgG antibody; wherein at least one antigen of the at least one antigen coated on the solid support and at least one antigen of the at least one labeled antigen can bind to the same IgG antibody or the same IgM antibody in the sample. The kit can overcome the disadvantages caused by the detection principle while retaining the advantages of each detection principle. In addition, a method for detecting antibodies produced after pathogen infection in a sample is provided.

This invention provides a method for identifying ground faults in distribution network lines based on a time-series large model, comprising: Step S1: data acquisition and spatiotemporal alignment; Step S2: multi-scale sliding window segmentation; Step S3: calculation of physical enhancement features; Step S4: construction of a training sample set; Step S5: construction of a time-series large model with physical information enhancement; Step S6: model training; Step S7: real-time acquisition and identification of ground faults. This invention achieves high-precision, low-false-alarm ground fault detection, accurately identifies fault types and faulty lines, and effectively solves the identification challenges of extreme scenarios such as intermittent arc grounding and high-resistance grounding.

The invention relates to a piping shaft overflow detection method and device, and belongs to the field of urban public safety monitoring. Collecting images covering well lid and water body characteristics; preprocessing and labeling; a YOLO26s target detection model is adopted for recognition training, after a real-time video stream is framed according to the frequency f, obtained images are sequentially input into the trained YOLO26s model, detection results of various features in each frame are output, space-time joint verification is carried out through the feature overlapping degree and multi-frame statistics, and vehicle splashing and real overflow are distinguished; and setting a sliding frame number window, counting the number of frames appearing in each feature in the window, and judging a triggering early warning level according to a priority sequence. According to the invention, the false alarm rate of overflow detection is greatly reduced; and multi-stage early warning in the whole process from occurrence to explosion can be realized, so that the early warning speed is increased.

The invention provides a near-to-eye display system and near-to-eye display equipment. The near-to-eye display system comprises a light source, the light source comprises a display light machine and an infrared illumination module, the infrared illumination module is arranged on the display light machine, the display light machine is used for emitting image light, and the infrared illumination module is used for emitting infrared light; the waveguide assembly is arranged on the light emitting side of the light source, the waveguide assembly is used for transmitting the image light and the infrared light eyeball tracking camera, and the eyeball tracking camera is used for receiving the infrared light reflected by the eyeball area. The invention discloses a near-to-eye display system and near-to-eye display equipment, which can realize efficient multiplexing of a limited space.

This invention discloses an active injection-type fault nature identification method for wind farms connected to the grid via flexible DC transmission lines, belonging to the field of power system relay protection technology. S1. After a fault occurs, the sending-end MMC converter station detects a change in the circuit breaker state, exits the original V-f control strategy, and sets the modulation wave to zero, causing power loss on the AC side of the sending-end MMC converter station; S2. After waiting for the fault arc extinction time, the circuit breaker is reclosed, establishing a current injection channel; S3. The sending-end MMC converter station outputs a three-phase symmetrical sinusoidal modulation wave, which is processed to generate a switching signal, activating the capacitors of each phase bridge arm submodule, injecting a voltage detection signal into the AC side of the faulty line; S4. Based on the difference in the amplitude of the current signal generated by the voltage detection signal, the fault nature of the line is identified. This invention can accurately identify the fault nature of wind farms connected to the grid via flexible DC transmission lines, shorten power restoration time, improve system operational reliability, avoid overcurrent during the identification process in the event of severe faults, and has high sensitivity to high-resistance faults.

The present application relates to hydrophone technical field, it relates to a kind of wideband pressure-resistant hydrophone, including base, cover, piezoelectric sheet, damping liquid and sealing plug, base one end surface is equipped with slot, cover is sealed and connected at slot, piezoelectric sheet is fixed on the outer surface of cover, cavity filled with damping liquid is formed between cover and slot;Liquid injection hole is opened on the outer surface of base, and the inner wall or bottom of slot is equipped with communication hole, and liquid injection hole is communicated with communication hole through communication channel;Damping liquid uses incompressible insulating liquid, damping liquid is filled into cavity through liquid injection hole, communication channel, communication hole, and liquid injection hole is sealed through sealing plug;When liquid pressure acts on piezoelectric sheet, liquid pressure makes piezoelectric sheet produce extrusion deformation towards damping liquid direction, at this time, damping liquid generates a reverse thrust to piezoelectric sheet, the present application has the advantages of simple structure, can guarantee signal band width, high sensitivity and high pressure resistance.