85 results about "Product lifetime" patented technology

The invention provides a fluid product service life testing device. The fluid product service life testing device comprises a fluid generation device, a fluid product testing region and a washing device, wherein a fluid circulating pipeline is formed between the fluid generation device and the fluid product testing region; fluid flows into the fluid product testing region from the fluid generationdevice and then continually flows back into the fluid generation device; the washing device is communicated with the fluid circulating pipeline; the washing device is communicated with the fluid product testing region and then is communicated with the fluid generation device through the fluid circulating pipeline; the fluid generation device is connected with a sediment recycling device. The fluid product service life testing device can be used for testing the service life of a product through simulating fluid flowing of production conditions.

The invention provides a method and a device for evaluating the life of a product. The method comprises the following steps of: determining key devices of a complete machine equipment product; performing an accelerated life test on each key device, and obtaining the corresponding life characteristic according to accelerated life test data; and evaluating the life of the complete machine equipment product according to the life characteristic of each key device. By the method and the device, time for evaluating the life of the product can be shortened, and the cost of evaluating the life of the product can be reduced.

The invention discloses a practical electronic product service life evaluation model parameter high-accuracy extraction method, which comprises the following steps of: (1) determining a failure physical model and model parameters to be extracted; (2) acquiring mean values, upper limits and lower limits of geometric and material parameters of a product, and representing the uncertainty of the parameters by adopting process capability indexes; (3) evaluating initial model parameters of the failure physical model according to the mean values of the geometric and material parameters of the product; (4) performing sampling according to distribution types of the geometric and material parameters to obtain random values of the geometric and material parameters; (5) obtaining the random value of the service life of the product by combining a Monte-Carlo simulation method; (6) obtaining a theoretical distribution function of the service life of the product according to the random value of the service life; (7) processing experimental failure data by adopting a remaining ratio method to obtain an empirical distribution function of the service life of the product; (8) checking a degree of fitting of the two service life distribution function by utilizing a K-S checking method; and (9) performing optimal extraction on the model parameters until the model parameters with an optimal degree of fitting are obtained.

The invention discloses a comprehensive reliability evaluation method based on multi-test information. The method comprises the following specific steps of: 1, establishing a reliability model of a product; 2, estimating the failure rates of the product under different environments; 3, determining environment reduced factors; 4, performing time reducing and 5, evaluating the service life and reliability of the product. According to the method disclosed by the invention, multi-test information can be integrated, so that the service life and reliability of the product can be evaluated; under the condition that product samples and data are rare, the environment reduced factors under different conditions can be determined, and the evaluation on the service life and reliability of the product can be finished; and the invention provides a method for determining environment reduced factors by utilizing a product reliability estimation result, so that the process of determining the environment reduced factors is simplified, and the method disclosed by the invention can be applied more simply and conveniently.

The invention provides an accelerated degradation test statistical analysis method under a multi-stress multi-failure mode dependent competition condition. The method comprises the following steps: acquiring multi-stress accelerated degradation test data of a product; selecting a proper distribution model and estimating distribution parameters; establishing a model between the degradation amount distribution parameter and time and estimating a model parameter; constructing a multi-stress acceleration model; modelling multi-failure-mode dependent competitive reliability; and solving unknown parameters of the model to obtain product reliability distribution. The coupling influence of multiple stresses on life characteristics and the dependency of a degradation process and a random impact process are considered, a reliability function under the N stress M failure mode dependency competition condition is established, and the gap in the related research field is filled; based on product degradation amount distribution and a multi-stress multi-failure-mode dependent competition reliability model, an analysis method of an N-stress M-failure-mode dependent competition accelerated degradation test is established systematically for the first time, engineering practice is better met, the service life of a product is prolonged, and the accuracy of reliability evaluation is improved.

A product service life rapid test method based on a physical model comprises the steps of determining an equivalent environment profile; determining acceleration test conditions; determining an upper quality specification limit of the test; and determining a plurality of groups of sampling plans (n, c) under the given reliability and user risk. According to the method, the degradation physical model and acceleration tests are combined, so that forming of service life rapid test schemes of products of different types can be effectively guided, and whether the batch of products can meet service life index requirements under specified utilization conditions and environment conditions is tested within a short time. The stability rapid test method for product performance parameters is provided through the performance parameter physical model, so that the test sample size and test time can be saved, and research and development costs can be reduced; and by means of the acceleration test method, product batch production test time can be greatly shortened, and test procedures can be simplified.

The invention discloses a similar product life migration prediction method and system, and relates to the technical field of similar product migration learning, and the method comprises the steps: preprocessing to-be-tested formula similar product short-term cycle life test data and other formula battery full-life test data, and obtaining target sample data and a plurality of pieces of training data; obtaining migratable sample data for predicting the service life of the cross-formula similar product by carrying out minimum screening on curve form, capacity degradation rate similarity, servicelife distribution similarity and distance measurement, carrying out service life migration prediction on the cross-formula similar product by utilizing a service life prediction model adapted to themigratable sample data, and obtaining a life prediction result. According to the invention, the accurate prediction of the cross-formula residual life of the lithium ion battery is realized, the prediction accuracy can reach 99.9% at most, the test time and cost in the design and development process of the lithium battery can be effectively saved, and the method has considerable economic benefitsand application value.

An improved method for prolonging the product service life based on the material ratio and a key process parameter. The method comprises the following steps: 1, determining the key process parameter and a key performance parameter; 2, obtaining service life data of a product with the material ratio and the key process parameter controlled; 3, establishing a product service life prediction model based on the material ratio and the key process parameter; 4, optimizing the material ratio and the key process parameter to achieve prolonging of the product service life. According to the improved method for prolonging the product service life based on the material ratio and the key process parameter, the reliability and service life of the product are quantitatively adjusted in the view of optimizing the material ratio and the key process parameter, and the non-linear mapping relation model between the material ratio, the key process parameter and the product service life is established for the first time, so that the service life prolonging obtained according to the model is more accurate and more favorable for instructing the industrial production. The complete flow from parameter selection, data obtaining through experiment design and modeling to final prolonging of the service life is given. The method comprises the detailed steps and is easy to implement.

The process of the present invention significantly increases the durability of superhydrophobic surfaces, while retaining similar optical properties to those of the original surface. The process uses velocity and heat to take freshly formed nano- and ultrafine particles and can partially embed and chemically bond them to the substrate, creating a strongly bonded nano-to-submicron textured surface. This nanotextured surface can then be modified to have desirable surface properties; for example, it can be hydrophobic, oliophobic, or hydrophilic. The high points of the coating made with this process protect the remainder of the surface from abrasion, thus greatly increasing product life in many uses. In preferred embodiments, the process is used to coat transportation vehicle windshields.

A memory system includes a first memory device, a second memory device, and a controller. The second memory device has a write endurance which is higher than a write endurance of the first memory device. The controller performs an error correction process on original data outputted from a host to generate a codeword including the original data and parity data. The controller separates the codeword into the original data and the parity data to write the separated original data into the first memory device and to write the separated parity data into the second memory device.

The present invention relates to electromigration testing and evaluation methods and apparatus for a device under test with an interconnect structure. The method comprises forcing the occurrence of a step resistance-increase of the interconnect structure due to electromigration in the first layer and subsequently subjecting the interconnect structure to at least three respective predetermined stress conditions while concurrently measuring a test quantity indicative of an electrical resistance of the interconnect structure. The method allows performing an electromigration test in much shorter time than known electromigration testing methods, without loss of information or accuracy. It is therefore possible to accelerate the optimization of the interconnect manufacturing process so that the conductor electromigration kinetics remains compatible with a required product lifetime. This allows reducing the time and cost for electromigration testing and thus fabricating integrated-circuit devices with a lower overall cost.

To improve product lifetime as well as to increase wearing feeling, maintainability and productivity, and to suppress manufacturing costs and expenses of the user. A portable electronic device 10 includes a device body 20 arranged inside a garment W and housing an electronic component and a fixing member 30A formed separately from the device body 20 and arranged outside the garment W, which fixes the device body 20 so as to be attached and detached to and from the garment W in a state of sandwiching the garment W between the fixing member 30A and the device bogy 20 from the other side of the garment W. The fixing member 30A is formed so as to be elastically deformed, which is formed in a ring shape surrounding the device body 20. Gaps are provided on both sides of the device body 20 in the radial direction of the fixing member 30A between an inner peripheral surface of the fixing member 30A and the device body 20.

A power converter reduces output ripple without using an electrolytic primary-side capacitor that can reduce product lifetime. Primary-Side Regulation (PSR) using an auxiliary winding provides a regulated secondary voltage with some low-frequency ripple on a secondary winding of a transformer. A smaller secondary capacitor that is not an electrolytic capacitor filters the output of the secondary side. A bang-bang controller controls the secondary side current to reduce current ripple despite voltage ripple. The bang-bang controller has a series resistor and inductor in series with a load such as an LED. A voltage drop across the series resistor increases when a switch turns on. This increasing voltage drop toggles the switch off once an upper limit voltage is reached. The voltage drop then decreases as inductor current is shunted by a diode, until the voltage drop reaches a lower limit voltage and the switch toggles on again.

An aluminum extrusion external framework of LCD monitor primarily comprises a front frame cap, a back frame cap, and a sheathing, which are assembled with one another. Several movable laminas are mounted on the inside of the back frame cap, wherein the locking positions of the movable laminas are adjustable. The aluminum extrusion external framework of the LCD monitor is made of aluminum for lightening its weight and conforming to the recycle-based environmental protection so as to facilitate the heat sinking, reduce the production cost, and increase the product lifetime. Besides, the movable laminas are applied to the raised slideways around the inside of the back frame cap so as to be universally suitable for the existing LCD panel having various specifications and dimensions.

The invention relates to a product storage life and reliability evaluation method. The method comprises: A1, carrying out a product accelerated storage stress test to obtain performance degradation data; A2, performing product performance degradation modeling based on a random wiener process; A3, carrying out life prediction under product acceleration stress based on a random Wiener process; A4, establishing a service life-temperature acceleration model, and estimating parameters of the service life-temperature acceleration model; A5, performing acceleration factor estimation under acceleration stress; A6, performing product life estimation value under normal stress based on acceleration factor conversion; A7, performing product life distribution inspection and distribution parameter estimation are carried out; and A8, carrying out storage life and reliability evaluation.

The invention is a new Velcro-backed abrasive cloth. It is used in the coated abrasives industry. Its uniqueness is in the construction. It is formed by a cloth with Velcro on one side (1), after the cloth is dipped in resin, the side with no Velcro is coated with a layer of primer (2), and an abrasive layer (3) is then planted on top of the primer. On top of the abrasive layer, a multi-layer adhesive (4) is then planted. There is an anti clogging coating, an anti static coating or a combination of both on the multi-layer adhesive. This new Velcro backed abrasive cloth utilizes a napped fabric as the base material. The abrasives are directly planted onto the resin treated base material thus reducing the manufacturing steps and lowering costs. The unique construction of the base material extends the product lifetime and increases the sanding efficiency.

The present invention relates to water-based and water-free, lightweight modeling compositions comprising a filler made of EVA foam particles and a water-based or water-free matrix. Advantageously, the modeling composition has little to no shrinkage over time and it has an increased product life.

The invention discloses a long-life valve regulation type sealed lead acid battery life quick detection method. The long-life valve regulation type sealed lead acid battery life quick detection method includes the steps: performing random sampling in the same batch of products, equally dividing the samples into two groups, in the same detection environment, applying a circulating charging and discharging detection method to one group, applying a constant current charging detection method to the other group, converting the two groups of detection data into the life of products, and taking the minimum life value as the life of the product. The long-life valve regulation type sealed lead acid battery life quick detection method can accelerate verification of the life of the product by increasing the discharging and charging currents and increasing the discharging depth of a battery. The long-life valve regulation type sealed lead acid battery life quick detection method can greatly reduce the life detection time, thus saving the detection cost of the manufacture party, enabling the demand party to know about the product life as soon as possible, and being convenient for arranging an ordering contract practically.