39 results about "Life limiting" patented technology

The invention discloses a monitoring device and a monitoring method for filter screen life of a purifier. The method comprises the following steps: firstly acquiring current air quality information and current wind speed information through a detection module, and then sending to a center control module, computing the rest working life of the filter screen of the purifier through the center control module according to the current air quality information and the current wind speed information, when the rest working life equals to a life limit threshold value, reminding a user of replacing the filter screen of the purifier. Since the air quality is considered in the computation of the life of the filter screen, the computed life is more close to the actual life of the filter screen. The life of the filter screen is progressively decreased per 10 sec according to the current wind speed and air quality, the life of the filter screen can be more carefully estimated, the estimation error is reduced, the computation precision is promoted, and the client loss is reduced.

Systems, methods and computer program products calculate the life remaining in a machine, such as an electric motor, or the life remaining in individual components within a machine. Life remaining calculations are based on information collected from multiple sources, including operator input data, historical data, and lookup tables. Using this information the remaining useful life of the machine is calculated based on quantitative data, standard design life limits and on reliability analysis such that continuous historical parameter data is not required to analyze or assess the life of the machine.

The invention discloses a method of calculating exponential life-limited spares demand; the method mainly comprises the steps of simulating life of a life-limited spare to produce life random numbers ti of not less than 1000 life-limited spares, wherein the life random numbers ti comply with exponential distribution exp(Mu0); simulating service lives of life-limited spares; traversing and correcting the random numbers ti to obtain ti; subjecting the random numbers ti of step 2 to normal distribution fitting calculation, with the calculation result marked as N(Mu, Sigma2); calculating spares support probability P within support task time when the number of the life-limited spares is j; setting a threshold of the support probability so that a number S of the life-limited spares, satisfied when the support probability is greater than or equal to the above threshold, is the calculated demand for life-limited spares. The method of calculating exponential life-limited spares demand implemented according to the invention allows the demand for exponential life-limited spares to be calculated accurately.

The invention discloses a state monitoring and diagnosis alarm method for a mechanical component of satellite borne rotary equipment, which comprises the following steps of: detecting a process of recording vibratory response of a satellite borne rotary mechanism; reading acceleration response measurement time domain signals; analyzing an acceleration response measurement spectrum; setting an emergency alarm or shutdown line; setting an early warning line in a time domain 0.25g and a frequency domain 0.5 multiplication (0.03g); presetting an amplitude alarm line 0.25g in software of data time domain acquisition, and sending early warning prompt when reaching or exceeding the value; and likewise, setting an early warning value in the frequency domain at 0.5 frequency multiplication such as fast scanning 100Hz or 300Hz. The method solves the problems of evaluating the state of the mechanical component of the rotary equipment of a satellite and predicting and assessing the performance variation tendency and the life limit of the mechanical component and the like. The method is simple, convenient and effective to implement, prolongs the service life of the satellite borne rotary equipment, and improves the work efficiency and the like.

A method for determining an engine part life usage of a gas turbine engine life limited part used on an aircraft. The method includes operating a gas turbine engine that includes a plurality of rotating components and a plurality of sensors configured to monitor a plurality of gas turbine engine operating parameters, obtaining outputs from the plurality of sensors, and utilizing at least some of the outputs to calculate the life usage of at least one life limited part to facilitate tracking the life-usage of an individual life limited part on the gas turbine engine that is consumed on a flight by flight basis.

The invention relates to a periodic wear balancing method and a memory management method of a phase change memory. The method comprises the steps of: S1, maintaining a counter for overall writing times for a physical memory of the phase change memory; S2, increasing used-list and threshold-list doubly linked lists to each sublist, and simultaneously increasing an overall bad-list to maintain the memory region which can not be allocated; S3, when the data is written to a physical memory page, synchronously updating the counter for the overall writing times and a counter for accumulative writing times of a memory block during current allocation; S4, setting a writing threshold, after the writing times of the memory block during the current allocution exceeds the writing threshold, releasing the memory block and placing the memory block in the threshold-list of the corresponding sublist, then applying to allocate a memory block with identical capacity, and copying the data content from an old memory block to the new allocated memory block; and S5, when the overall writing times of the physical memory page exceeds the life limit of a phase change storage unit, and placing the memory page in the bad-list so as not to allocate for ever.

The invention relates to a technical field of light emitting diodes (LEDs), in particular to a self-adaptive drive circuit and an LED lamp with the same. The LED lamp comprises a plurality of series LED lamp strings, and each LED lamp string comprises at least one series LED lamp bead; and the self-adaptive drive circuit comprises a rectifying unit, a current limiting unit, a voltage detection and connectivity control unit and at least one controllable switch unit. According to the self-adaptive drive circuit and the LED lamp with the same, the LEDs can be driven normally in an extremely simple drive mode, which can work without using complex constant current drive circuit and electrolytic capacitor that is life limiting. At the same time, the stroboflash phenomenon is eliminated, the power factor is improved, harmonic distortion is reduced, electromagnetic interference is eliminated, and the cost is reduced.

It provides a method for managing the remaining life of a high temperature component used in a gas turbine that enables a state of fatigue of a high temperature component to be evaluated and controlled with a high level of accuracy, and a program medium for performing the method for managing the remaining life of a high temperature gas turbine component on a computer. In the method for managing the lifespan of a high temperature component used in a gas turbine, the lifespan of a high temperature component being evaluated is set within an operating area bounded by a component life limit line that is determined on the basis of field data giving the correlation between the operating time and operating cycles for the state of fatigue from past high temperature components. As the program medium, a medium is employed that is provided with a program in which this method is used for managing a lifespan of a high temperature component used in a gas turbine.

The invention discloses a monitoring video file processing method, relating to the monitoring video file management and storage. The monitoring video file processing method comprises steps of performing frame deletion on an original monitoring video file which achieves the preset storage life limit and is ready to be deleted, uniformly deleting half or more than half of the video frames of the monitoring video files according to the identical interval, generating a new second generation monitoring video file to store after frame deletion is finished, deleting the original monitoring video file, deleting the second generation monitoring video file after the preset second generation monitoring video file storage life limit is achieved, or utilizing the same processing method to generate the third generation, the fourth generation, and N generation monitoring video file. The invention is fast in processing the monitoring video file and is not high in hardware requirement. The beneficial effects of the invention are that: the volume of the monitoring video file is reasonably reduced with the time passing by, and the storage life of the monitoring video file is prolonged.

The invention discloses an in-operation power transformer short circuit resisting ability comprehensive evaluation method. The method comprises the following steps: 1, evaluating an operation condition: evaluating in-operation transformer winding short circuit resisting ability accumulative effect from four factors including operation life limit, short circuit impact duration, short circuit impacttimes and short circuit impact current size; 2, winding deformation related test evaluation: evaluating transformer winding deformation condition through a low voltage impedance method, a frequency response method and an inter-winding capacitance measurement method; 3, checking in-operation transformer short circuit resisting ability; 4, performing comprehensive analysis according to evaluation results of the steps 1-3. The method provided by the invention solves technical problems in the prior art, for example, in the prior art, in the in-operation power transformer short circuit resisting ability comprehensive evaluation, actual operation conditions and periodic preset condition influence factors are not considered, when an in-operation old transformer cannot obtain structure parameters, evaluation thoughts and methods are not given.

The invention relates to a method for testing the charge-discharge reliability of a battery, which comprises the following steps: controlling a power supply to charge the battery; when the charging is finished, notifying an electrical signal tester to repeatedly measure the voltage and the current of the battery; controlling the battery to discharge for the power supply; when the discharging is finished, notifying the electrical signal tester to repeatedly measure the voltage and the current of the battery; according to the voltage values and the current values, which are measured when the charging is finished, generating a first life curve, and according to the voltage values and the current values, which are measured when the discharging is finished, generating a second life curve; judging whether the first and second life curves are coincided with corresponding critical life limit characteristic curves; when the first and second life curves are coincided with the corresponding critical life limit characteristic curves, generating a service reliability testing report of the battery; or when a certain curve is not coincided with the corresponding critical life limit characteristic curve, returning to the charging step. The invention also provides a system for testing the charge-discharge reliability of the battery. By utilizing the method and the system for testing the charge-discharge reliability of the battery, the service life of the battery can be automatically tested.

The invention discloses a satellite solar cell on-orbit performance degradation prediction method. The method comprises the steps of: analyzing life-related characteristic parameters of a solar cell; collecting, processing and refining on-orbit data of the characteristic parameters of the solar cell; establishing a theory model of on-orbit attenuation trend; and predicting an on-orbit life limit value of the solar cell. According to the prediction method, the life and reliability problems of the solar cell, restricting the life and reliability of a satellite platform, in a space environment are solved, thereby avoiding satellite failure due to efficiency reduction of the solar cell, favorably improving long-term and reliable operation capability of the satellite platform, favorably improving the maturity and inheritance of the satellite platform, favorably improving the application capability of the satellite platform and favorably expanding the application range of the satellite platform.

A system, non-transitory computer readable medium, and method are provided for determining patient care services for a patient being treated for a life-threatening or life-limiting progressive illness. Patient symptoms are identified by receiving data comprising personal health information of a patient. The level of distress of the patient is determined by analyzing the data comprising personal health information of the patent. A score is established based on criteria comprising the level of distress of the patient and a severity of the patient symptoms. The score correlates the level of distress of the patient with a clinical course of the life-threatening or life-limiting progressive illness. One or more patient care services appropriate for the clinical course of the life-threatening or life-limiting progressive illness and the level of distress of the patient is determined based on the score.

A method and apparatus for reviewing a bundle of documents relating to the trace history of a life limited part, such as a part for an aircraft engine, for possible acquisition of the part, and a method and apparatus for preparing a bundle of documents relating to the trace history of a life limited part for use by the review program. Documents relating to the part history are prepared for review by identifying the document category, inputting information from the documents, and highlighting information on the documents. As the prepared document bundle is reviewed, the reviewer is shown the documents by category, the collected information, and the highlighted portions. The reviewer may track their progress through the document bundle and may track the progress of other reviewers. The reviewers may approve the acquisition of the part based on the review.

The invention discloses a power supply without an electrolytic capacitor, which includes a rectifying device, a filter, a loop detection device, a diode, a triode, an inductor, a power manager and an LED. The invention provides a power supply suitable for driving LEDs, which breaks through the limitation of short service life of electrolytic capacitors and greatly increases the service life of products.

The invention relates to the technical field of nuclear power station informatization construction, in particular to a spare part service life management method and device in nuclear power integratedequipment, the equipment and a medium. The method comprises the following steps: analyzing overall spare part information of nuclear power overall equipment, then obtaining spare part information of life-limit fixed spare parts, obtaining ideal storage conditions of each life-limit fixed spare part, and querying an ideal life-limit of the life-limit fixed spare parts through the spare part information of the life-limit fixed spare parts; and acquiring actual storage conditions of the nuclear power overall equipment in real time at a preset life detection time point, determining the loss life of the life-limit fixed spare part according to the ideal storage conditions and the actual storage conditions, and generating first actual expiration time of the life-limit fixed spare part accordingto the ideal life, the loss life and date information of the life detection time point. According to the invention, the purpose of accurate lifetime management of each lifetime fixed spare part in thenuclear power integrated equipment can be realized, nuclear power station resources are saved, and nuclear power station safety is ensured.