3 results about "Joule" patented technology

The present application relates to the technical field of power transmission line engineering and geotechnical engineering, and discloses a method, system, device and medium for calculating the stress of a tower slope under lightning impact, which collects lightning current waveform data of the tower under lightning impact, calculates the power density of Joule heat source, and establishes a three-dimensional slope geometric model corresponding to the influence range of lightning impact on the slope soil body; the power density of the Joule heat source is input into the three-dimensional transient heat conduction equation, and combined with the established geometric model, the maximum temperature rise value of the slope soil body under lightning impact is determined, so as to convert the temperature change into soil stress and obtain the initial lightning impact stress value; the correction coefficient is determined by the lightning current waveform data and multi-dimensional influence data to correct the initial lightning impact stress value, and the transient stress value of the tower slope under lightning impact is obtained; the present application fully considers the coupling of electric-thermal-mechanical multi-physical fields and the microsecond-level transient effect, and greatly improves the calculation accuracy of the transient stress of the tower slope under lightning impact.

The present application relates to the technical field of electrical sensor, solve the technical problems of lacking physical constraint, the diagnosis result may violate the basic law of thermodynamics, sensitive to the distribution change of training data, and the monitoring accuracy is limited, especially relates to a kind of cable sheath comprehensive online monitoring method and system, the steps of this method are: collecting the original electrical signal of target cable, according to original electrical signal through filtering time stamp encapsulation processing, obtain synchronous data frame, the present application is based on graph neural network simultaneously using cable topological graph structure, provides the distribution input of joule heat source containing topological dependence, can greatly improve the identification accuracy, form the linkage effect of spatial topology and heat field propagation, further optimize fault location precision, avoid unnecessary excavation repair, save cost, and the diagnosis result obtained can directly guide operation and maintenance decision, greatly improve operation and maintenance work efficiency.

To provide a temperature prediction method in the vicinity of a current-carrying contact based on heat generation through Joule heat generated when carrying a current while sliding and moving a sliding surface of a contact strip along a trolley wire.SOLUTION: The temperature prediction step includes a step of calculating a reaching temperature at a distance X from the sliding surface based on a potential distribution in the slider during energization, and a position temperature calculation step of calculating a normalized temperature normalized by an initial temperature of the sliding surface and the reaching temperature at the distance X with respect to a thermal diffusion time which is a function of the distance X at the position temperature of the distance X.SELECTED DRAWING: Figure 3