5 results about "Life time" patented technology

The invention relates to a dynamic adjust gyroscope life forecasting method based on gray model. By data collection of vibration effective value, random drift and environmental temperature parameter which are preprocessed using radial neural networks, influence of environmental temperature on vibration effective value and random drift is eliminated and random drift and effective value just related to time are obtained by subtracting drift constant value term, then trend term of vibration effective value and random drift are extracted by using wavelet transformation and gray model are built separately for their trend term. The smaller data in two values of life predicted of dynamic adjust gyroscope unless two predicted values exceeding performance parameter limitation when dynamic adjust gyroscope is considered losing effect. The invention uses performance parameter of life probative period of product to predict its life, showing discipline of performance parameter and life of dynamic adjust gyroscope. It is easy and convenient economical and reliable.

The present application relates to the field of power cable engineering, and discloses a low-cost repair decision method for a cable, which comprises the following steps: on-line monitoring the insulation state of the cable by a spread spectrum time domain reflection method, recording the end-of-life time of the cable, collecting the end-of-life time of a plurality of different cables; establishing a cable reliability model according to the Weibull distribution law of the end-of-life time of the plurality of different cables; establishing an average cost rate model according to a preventive repair probability, a failure probability, a preventive repair cost and a failure repair cost; introducing a chaos factor into a mathematical model of a chimpanzee optimization algorithm, and optimizing and solving a target function by a chaotic chimpanzee optimization algorithm according to the preventive repair cost and the failure repair cost to obtain a minimum average cost rate, and outputting a best maintenance period and a repair threshold of the cable. The present application can output the best maintenance period and the repair threshold of the cable under the condition of ensuring the reliability of the cable, and realize a low-cost repair decision.

The utility model discloses a kind of high-life microswitch, and its technical solution main points include base and the press handle that moves up and down relative to base, the base is provided with several electric contacts, the electric contact top is provided with the pot piece for the electric contact is conducted, the press handle is provided with auxiliary elastic member, the auxiliary elastic member one end protrudes the bottom of press handle, so that when press handle is pressed down, protruding auxiliary elastic member is used on pot piece. The utility model is driven with the auxiliary elastic member set in press handle to pot piece deformation, reduce the impact force too big and deformation too big etc. Problem brought by press handle direct drive pot piece deformation, prolong the service life of microswitch.

The application discloses an aging life prediction method and system for SiC MOSFET, relates to the technical field of silicon carbide field effect tube aging life prediction, and comprises the following steps: acquiring an initial life time data set corresponding to each experimental point combination; constructing a response surface model according to the initial life time data set by using a response surface analysis method; performing residual analysis on the response surface model to obtain qualified life time data that meets model adaptability and hypothesis condition compliance; constructing an aging life prediction initial model based on the coupling effect between aging influence factors and combining the response surface model; training the aging life prediction initial model by using the qualified life time data to obtain an aging life prediction model; and outputting an aging life prediction result of the SiC MOSFET according to real-time aging influence factor data and the aging life prediction model. The application has the beneficial effects that the experimental data demand is reduced and the aging life prediction accuracy is improved simultaneously.

The utility model provides a long -life migration RS485 data cable belongs to cable technical field, it includes conductor, insulation, expansion layer, shield layer and outer sheath, the whole characteristic impedance of cable satisfies 120Omega 15Omega, the insulating layer is the polyethylene material quality of good mechanical property, smaller dielectric constant, the expansion layer material quality is the elastomer material quality of good mechanical property, smaller dielectric constant soft, the sheath material quality is wear -resisting polyether type polyurethane material quality, through the reasonable insulation and expansion layer outer diameter cooperation, make the whole characteristic impedance of cable satisfy 120Omega 15Omega, even in the cable long -time migration under the condition of shield layer breakage fracture, characteristic impedance still can satisfy transmission requirement, guarantee the ability of cable long -time trailing operation transmission signal.