4results about How to "Reduce random noise" patented technology

This invention discloses a method, system, medium, and product for detecting terminal crimping imaging quality, relating to the field of imaging quality detection. In this method, deep learning feature extraction is combined with image processing technology. Through the synergistic effect of a dynamic threshold adjustment strategy library and an edge detection morphological processing rule library, a complete adaptive detection process is formed. This invention can automatically adjust detection parameters based on real-time image brightness conditions and terminal specification information, ensuring stable detection accuracy under different lighting environments and diverse terminal types. This reduces the problems of unstable detection accuracy and poor versatility caused by fixed parameters in existing technologies, improving the reliability and practicality of terminal crimping quality detection.

This application provides a method and system for detecting the location of welds in coated pipelines based on magnetic field attenuation characteristics. The method includes: applying pulsed eddy current excitation to the coated pipeline, wherein the pulsed eddy current excitation uses a square wave or step wave signal; arranging multiple magnetic field sensors along the circumference of the pipeline and receiving voltage signals induced in the pipeline by the pulsed eddy currents, which include secondary magnetic field decay signals; measuring the magnetic field decay rate of the voltage signal received by each magnetic field sensor, wherein the magnetic field decay rate is characterized by the attenuation slope of the secondary magnetic field decay signal; superimposing the attenuation rate slope values ​​of the multiple magnetic field sensors in the later stage of magnetic field decay to obtain a superimposed attenuation rate slope value; and determining the presence and location of the weld based on a comparison between the superimposed attenuation rate slope value and a preset threshold, wherein the preset threshold is set based on the attenuation rate slope value of the weldless region.

The present application relates to the field of optical fiber sensing, in particular to a kind of optical cable icing monitoring method and device.Mainly include: obtaining the first sensing data sequence in each sensing period, according to the first sensing data sequence, obtain the phase data sequence in each period;According to the phase data sequence, obtain the frequency spectrum data of the corresponding position phase change, according to the average value of the frequency spectrum data in multiple sensing periods, obtain the characteristic frequency, and estimate the icing thickness of the optical cable according to the change of the characteristic frequency.The present application reduces the interference fading of signal and environmental random noise, improves the single-span distance of icing monitoring, and can improve the icing monitoring accuracy.

The invention provides a quantum efficiency obtaining method and system and electronic equipment, and belongs to the technical field of image sensor testing and data analysis, and the quantum efficiency obtaining method comprises the steps: collecting multi-frame original image data; averaging each pixel value of each pixel point in the multi-frame original image data to obtain average frame image data; averaging pixel values of all pixel points in the test area in the average frame image data to obtain an average pixel value of an average frame; the ratio of the first difference value of the average pixel values of the average frames under the two test exposure times to the second difference value of the two test exposure times is used as the responsivity of the image sensor; and acquiring the actual photoelectric responsivity and quantum efficiency of the image sensor according to the responsivity of the image sensor, the irradiance of the incident light and the conversion gain of the image sensor. According to the quantum efficiency acquisition method, the quantum efficiency acquisition system and the electronic equipment provided by the invention, the test precision of the quantum efficiency can be improved.