6results about How to "Raise the threshold" patented technology

The utility model discloses provide an audio signal limiting circuit, include: at least one way limiting branch, any limiting branch includes: gain module is used for receiving audio signal, and carries out amplification processing to audio signal, generates audio amplification signal and exports, conversion module is used for converting the voltage type of audio amplification signal, obtains audio conversion signal, comparison module is used for according to the size between the voltage of audio conversion signal and threshold voltage, and output comparison signal, and comparison signal has first state and second state, limiting module is coupled with comparison module and gain module respectively, when comparison signal has first state, is in the gating state, and the passage between gain module and limiting module is gated to access limiting resistance, and when comparison signal has second state, is in the off state, and the passage between gain module and limiting module is disconnected to disconnect limiting resistance. Adopt above -mentioned technical scheme, can effectively limit the amplitude of audio amplification signal.

A motor is provided. A motor according to an aspect of the present invention includes: a cover; a first bearing coupled to the cover body; a rotating shaft rotatably coupled to the first bearing; a rotor coupled to the rotating shaft and disposed below the first bearing in the axial direction; a stator assembly disposed on the outside in the radial direction of the rotor; an impeller coupled to the rotating shaft and disposed below the rotor in the axial direction; a diffuser coupled to the cover body and disposed below the impeller in the axial direction; a second bearing coupled to a central region of the diffuser and to which the rotating shaft is rotatably coupled; the bearing support is arranged between the first bearing and the cover body; the elastic component is arranged between the bearing support and the cover body in the axial direction; the diffuser includes a plurality of diffuser ribs extending downward from a bottom surface.

This invention relates to a multi-dimensional confidence-based point-line fusion SLAM method and system for visually degraded environments, belonging to the fields of computer vision and robot navigation technology. The invention constructs a nonlinear mapping function based on two-dimensional image entropy, dynamically adjusts the gradient threshold and Gaussian smoothing parameters of the line feature extraction algorithm, and introduces a sudden illumination safety mode to enhance adaptability to extreme environments. It performs photometric consistency verification on point features after optical flow tracking, performs region growing on line features using the aforementioned adaptive parameters, and proposes a hierarchical non-convex relaxation algorithm guided by dual weights of geometric residuals and pixel gradients for noise-resistant fitting. It establishes a linear inverse mapping mechanism between front-end feature confidence and back-end optimization information matrix, dynamically adjusting residual weights according to feature quality. In motion-blurred and illumination-changing environments, it can effectively extract high-quality features and perform tight-coupling optimization, improving the positioning accuracy and speed of the SLAM system in weak-texture and drastically changing illumination environments.

The application discloses a kind of supersymmetry loss type semiconductor laser and preparation method, comprising: ridge waveguide and tapered gain waveguide integrated on the same epitaxial structure;Tapered gain waveguide is located at the output end of ridge waveguide;Tapered gain waveguide is provided with left supersymmetry waveguide and right supersymmetry waveguide, left supersymmetry waveguide and right supersymmetry waveguide are asymmetrically arranged on the two sides of tapered gain waveguide central axis, to divide tapered gain waveguide into three parts;The starting width of central amplification area between left supersymmetry waveguide and right supersymmetry waveguide is the same as the width of ridge waveguide;Left supersymmetry waveguide and right supersymmetry waveguide have unequal lateral width, the propagation constant of base transverse mode or high-order mode generated by the two respectively matches the high-order transverse mode propagation constant generated in ridge waveguide, and the high-order transverse mode in directional dispersion loss transmission process is dispersed by refractive index coupling mechanism, to realize base transverse mode single-mode laser output.

The present application relates to the technical field of power electronics and smart grid, and provides a micro-grid anti-noise neuromorphic inference control method and system, comprising: obtaining electrical measurement signals of the micro-grid; performing frequency domain attenuation processing on the electrical measurement signals through the inherent filtering characteristics of the equivalent circuit of the neuromorphic computing model to suppress noise interference; adaptively adjusting an event capture threshold according to the environmental noise intensity; capturing event signals from the electrical measurement signals subjected to the frequency domain attenuation processing based on the adjusted event capture threshold; and performing remote information inference based on the event signals and generating control instructions to adjust the operating state of the micro-grid. The present application suppresses noise by using the inherent filtering characteristics of the equivalent circuit, and effectively improves the inference accuracy and robustness of the micro-grid control system in a noisy environment by combining an adaptive threshold adjustment mechanism.

This invention discloses a performance optimization method for a Φ-OTDR and interferometer fusion system based on arithmetic concatenated pseudo-random mapping coding. By constructing a multi-level arithmetic concatenated pseudo-random coding sequence to modulate the transmitted pulses of the Φ-OTDR system, pulse compression is achieved at the receiving end through matched correlation decoding. This compresses the equivalent pulse width to the chip width while maintaining the transmitted power, improving the system's spatial resolution and reducing autocorrelation sidelobes. The cross-phase modulation phase disturbances generated when the coded pulses and continuous light propagate in the same optical fiber exhibit pseudo-random incoherent superposition characteristics during correlation decoding, suppressing nonlinear phase noise in the demodulated output and reducing its impact on the interferometer's continuous light measurement channel. Furthermore, the arithmetic concatenated pseudo-random coding modulation broadens the transmitted spectrum, reduces the optical power spectral density, and increases the stimulated Brillouin scattering threshold, enhancing the system's long-distance transmission capability. This method is suitable for performance optimization of Φ-OTDR and interferometer fusion measurement systems.