52 results about "Ultrasonic analysis" patented technology

A system for resistance spot welding control and a method thereof are disclosed.A system for regulating welding parameters of a spot welding machine joining a plurality of panels according to an aspect of the present disclosure includes an ultrasonic sensor installed inside an electrode of a welding gun, applying a ultrasonic wave to a welding part of the panel, and detecting a reflected ultrasonic signal; an ultrasonic analyzer capable of creating ultrasonic analysis information by analyzing in real time the ultrasonic signal; and a welding controller receiving the ultrasonic analysis information from the ultrasonic analyzer, performing adaptive welding control with the welding parameters set based on information of the panel, and compensating in real time one or more welding parameters according to the received ultrasonic analysis information.

The application discloses a battery thermal runaway early warning method and system based on multi-frequency ultrasonic analysis, and the method comprises the following steps: obtaining original reflection signals of a measured battery under multi-frequency band ultrasonic pulse excitation in multiple periods; separating front surface reflection signals, internal scattering signals and back surface reflection signals from the reflection signals after noise reduction according to time delay differences; calculating a comprehensive safety index by using a comprehensive safety index model corresponding to the battery type of the measured battery according to the characteristics of the front surface reflection signals, the internal scattering signals and the back surface reflection signals; comparing the comprehensive safety index with a preset index threshold value corresponding to the battery type of the measured battery, and triggering the early warning if the comprehensive safety index is greater than the preset index threshold value and the duration exceeds a preset time length. The application aims at different types of batteries, realizes battery thermal runaway early warning with early, universal and low false alarm, and solves the early monitoring problem of different types of battery thermal runaway.