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5869 results about "Fault rate" patented technology

Medical disposable electric motor saw

The invention discloses a medical disposable electric motor saw, which comprises a handle and an enclosure main body, wherein a non-removable battery and a circuit control panel which is connected with the battery are arranged in the handle; a press part of the handle is provided with a speed adjusting switch which is connected with the circuit control panel; a hollow motor which is provided with a driving shaft is arranged in the enclosure main body; the battery is a rechargeable lithium battery; a charging socket is formed in the bottom or the lateral part of the handle; a sterile sealing bag is arranged on the outer sides of the handle and the enclosure main body. After the structure is adopted, and the hollow motor is used, the medical disposable electric motor saw is stable in transmission and good in braking performance, the weight of the medical disposable electric motor saw is about a half of that of an electric motor saw with a common motor, the structure is simple, the fault rate is low, the medical disposable electric motor saw is easy to carry and use, the manufacturing cost is low, the battery cannot be detached, so the loosening or dropping phenomenon cannot occur, and the completion quality of a surgery is effectively ensured. The sterile sealing bag is used, the wait for high-temperature high-pressure sterilization is not needed, and the medical disposable electric motor saw can be used any time. The precious operation time is saved for an emergency operation patient.
Owner:SUZHOU WANRUN MEDICAL SCI & TECH CO LTD

Extensible bayesian network editor with inferencing capabilities

A system for the representation, editing, evaluation, and inference of graphical models is disclosed which can be used to construct and evaluate a graphical model or graphical network and to calculate inference values. An efficient method of updating graphical models is demonstrated, and provides the basis for an improved system for manipulation and evaluation of probabilistic models. The graphical network editor is useful in the construction of graphical modes such as Bayesian Networks. The graphical network and network graphical user interface (GUI) are used in conjunction with each other to model a system wherein failure probabilities and the current state of components are taken into account to monitor the health and progress of a system for an engineer or engineering software to evaluate and monitor. The evaluation is useful in the monitoring of assets and other real systems having multiple, dependent, and independently operating components such as a pump, a manufacturing plant, a production line, an assembly line, where asset health and quality control is a concern. The asset components each influencing some overall outcome of a system or situation. Success or failure or probability of success, probability of failure and health of the system can be monitored and manipulated by altering the values of prior probability and posterior probability values. Failure correlation between components can be evaluated wherein failure rates of asset is unknown. Production and quality can be monitored and altered.
Owner:QUANTUM LEAP RES

Rail traffic real-time fault diagnosis method and system based on data comparative analysis

The present invention relates to a rail traffic real-time fault diagnosis method based on data comparative analysis and a rail traffic real-time fault diagnosis system based on data comparative analysis. The method comprises the steps of (1) collecting the historical monitoring data and real-time monitoring data of rail traffic signal equipment, (2) according to the correlation relationship between the parameters of the historical monitoring data, obtaining a comparative analysis model of a normal state and a fault state, (3) according to the comparative analysis model of the fault state, generating the classification model of fault through classifier training, (4) for the real-time monitoring data, judging the normal state or abnormal state of equipment operation through the comparative analysis model, and carrying out fault alarming if the state if the abnormal state, (5) for the data of the abnormal state, carrying out fault diagnosis and classification through a fault analysis model, and outputting a fault diagnosis result. According to the method and the system, the fault of the equipment is diagnosed through classification and comparative analysis methods, and the problems of heavy workload, low efficiency and high risk in the artificial diagnosis of a railway signaling system failure are effectively solved.
Owner:BEIJING TAILEDE INFORMATION TECH

Double-machine redundant tolerant system and redundant switching method thereof

The invention discloses a dual-computer redundancy fault-tolerant system and the redundancy switching method. The system comprises an A computer, a B computer, redundancy switch control units in the A and B computers transmit respective switch signals to a redundancy switch selecting unit, and the final control signal generated by the redundancy switch selecting unit is transmitted to a controlled unit. The redundancy switch control unit includes an arbitrary switch unit, a heartbeat receiving unit, a power on-off unit and a monitoring unit. The method comprises the following steps: the two computers are powered up, a master computer and a slavery computer are decided by power up strategy; the states of the two computers are judged; if the two computers have no fault, the task segment of a system is judged: if the system is in normal task segment, a working computer powers up a backup computer, and executes cold backup strategy; if the system is in key task segment, the working computer powers down the backup computer, and executes hot backup strategy; if a single computer has fault which is restorable, the fault is restored, or else, the system enters into single computer state. The system has simple structure and reliable signal transmission; the method is easy to control, the system fault rate is greatly reduced, thus having good fault-tolerant effect.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Automatic monitoring system for down-hole central pumping room drainage

The invention relates to an underground central pump room draining automatic monitoring system, which comprises a PLC control cabinet, a remote expanding module, a site data bus, a contact screen, an analog quantity and switching value input module, various monitoring probes, a travel switch, a level instrument and an executable section. A monitoring net adopts a form of combining a PROFIBUS DP site data bus and an industrial ethernet. A monitoring method for the system comprises: (1) monitoring the absorbing well water level; (2) monitoring the state for starting a high pressure switching cabinet by a water pump; (3) judging the valve levels of a gate valve, a ball valve of a water jet pumping device and a water distribution gate; (4) judging the valve levels of a vacuum pump ball valve; (5) measuring each equipment temperature measuring point; (6) measuring signals of a pressure sensor and a negative pressure sensor; (7) judging system faults; (8) automatically controlling the start-stop and operation numbers of the water pumps according to the absorbing well water level conditions; and (9) setting power supply peak avoiding time periods, and automatically selecting starting time and numbers of a pump. The system improves the system working reliability, reduces the equipment fault rate, and adopts a three-stage monitoring structure for a draining system.
Owner:BINHU COAL MINE ZAOZHUANG MINING GRP

Method and device for producing spring bed core full-automatically

The invention mainly discloses a method and device for producing spring bed core full-automatically; an automatic transmitter with simple and easy operation is used for connecting a spring coiling machine and a spring stringing machine integrally; under synchronous control, three machines coordinate the motion so as to realize full automatic production line from steel wire to bed core. The spring coiling machine equidistantly and horizontally outputs springs through a step conveying mechanism; the springs horizontally output adjust the turnover component of the automatic transmitter to be upright state and positioned into groups equidistantly by positioning components; the springs are pushed into the spring stringing machine from a conveying belt by means of the pushing component of the automatic transmitter to realize spring string. A full automatic production line is formed, and the steel wire as raw material is automatically made into the spring bed core, thereby greatly improving the production efficiency, shortening the production time in unit, reducing the labor intensity, and forming great economic benefit in enterprises; moreover, the obtained product has high quality and low defective rate, and the equipment failure rate is low.
Owner:SHAOXING HUAJIAN MATTRESS MACHINERY

Time sequence classification early warning method for storage device

The invention discloses a time sequence classification early warning method for a storage device. The method comprises the steps of collecting storage device parameters in real time; cleaning data; performing ARIMA time sequence analysis; and performing logistic regression analysis and early warning mechanism output. Under the background of a big data environment, time sequence prediction analysisis performed by adopting an ARIMA model according to historical data and hard disk SMART information obtained by statistics; the correlation between a SMART eigenvalue and a fault rate of the storagedevice is analyzed; and an eigenvalue more suitable for a Logistic model is selected out to perform classification prediction. A machine learning method is adopted for predicting the fault rate of the storage device, so that the problems of classification singleness and low early warning intensity in final prediction of the storage device are solved, the defects of hysteresis, low accuracy, pooractual early warning effect and difficult application to the big data environment for a disk early warning mechanism in the prior art are overcome, the occurrence probability of each early warning intensity can be predicted, and an effective solution is provided for real-time operation maintenance and monitoring in a data center environment.
Owner:HUAZHONG UNIV OF SCI & TECH

Startup control method of brushless DC motor

A startup control method of a BLDC motor is disclosed. The method can control the BLDC motor to prevent the generation of a transient current such that the vibration of the BLDC motor can be reduced at the startup stage and perform a stable conversion into a sensorless operation mode such that the startup failure rate of the BLDC motor can be reduced. The startup control method includes commutating a current applied to stator windings according to a rotor position. The method of operating the BLDC motor includes a rotor position that is forcibly aligned and so that phase commutation is performed, a back-electromotive force (back-emf) is detected from a lead voltage of a phase of a voltage which is not applied thereto after performing phase commutation and a determination is performed as to whether the detected back-emf is in a rising interval. The lead voltage of the phase of the voltage which is not applied thereto is integrated, such that if the back-emf is in a rising interval and if an instance that the integration result is greater than a predetermined value a phase commutation time point is set and conversion into a sensorless operation mode is performed if the back-emf detected from the lead voltage is in a stable interval, based on a frequency of the voltage applied to the stator winding.
Owner:SAMSUNG ELECTRONICS CO LTD

Method for estimating reliability of electric distribution system containing distributive wind power, photovoltaic and energy storage devices

The invention belongs to the field of power system reliability estimation, and relates to a method for estimating the reliability of an electric distribution system containing distributive wind power, photovoltaic and energy storage devices. The method comprises the following steps of: (1) acquiring configuration parameters of the electric distribution system; (2) forming a fault result list; (3) generating an energy storage charging and discharging state periodic list; (4) obtaining a normal running time TTF according to the fault rate of elements; (5) finding out an element which has TTFmin; (6) obtaining a fault time TTR according to the repair rate of the element, and calculating an energy storage state at the TTFmin moment; (7) searching the fault result list to determine a power failure situation of a load point in a non island area; (8) for an island area, calculating a draught fan real-time value, a photovoltaic real-time value and a load real-time value; (9) performing load attenuation on each island and recording the power failure situation of the load point in the island; (10) calculating the state variation of the energy storage of the island; (11) generating novel running time for the element and boosting a simulation clock to TTFmin+TTR; (12) searching for an element which is faulted at first again, and repeating the step (12) if the fault moment is less than the simulation clock, and if the fault moment is not less than the simulation clock, executing the step (13); and (13) judging whether the simulation clock is equal to a scheduled time length, and returning to the step (6) if the simulation clock is not equal to a scheduled time length; and if the simulation clock is equal to a scheduled time length, calculating a reliability index. By the method, the reliability level of the distribution system containing the distributive wind power, photovoltaic and energy storage devices can be estimated quantitatively.
Owner:TIANJIN UNIV

Fault tree and analytic hierarchy process based evaluation method of state of power transformer

InactiveCN103605881ALevel of understandingReasonable arrangements for maintenance workSpecial data processing applicationsTransformerIndex system
A fault tree and analytic hierarchy process based evaluation method of the state of a power transformer specifically comprises the steps of performing analysis on fault factors; establishing a comprehensive evaluation index system of the state of the power transformer; building a judgment matrix by the three-scale analytic hierarchy process; sorting and calculating every index weight; calculating comprehensive indexes of the power transformer; grading the comprehensive indexes of the power transformer. According to the fault tree and analytic hierarchy process based evaluation method of the state of the power transformer, the reasonable comprehensive evaluation index system of the state of the power transformer is established through the analysis by the fault tree method, meanwhile a three-scale analytic hierarchy process based comprehensive evaluation model of the state of the power transformer is disclosed, and accordingly the comprehensive evaluation on the state of the power transformer is objective, the man-made influence factors are effectively reduced, and the operation personnel can understand the state of the power transformer, determine the level of the power transformer and arrange a maintenance plan reasonably through the comprehensive evaluation on the state of the power transformer.
Owner:NANCHANG UNIV

Data protection method and system capable of combining with snapshot function based on distributed block storage

The invention provides a data protection method and system capable of combining with a snapshot function based on distributed block storage. The data protection method comprises the following steps: directly or indirectly mounting a ceph block device on a production server; deploying a backup client on the production server, and installing an I/O drive program which realizes backup processing between a product server data volume and the ceph block device; through a backup server, establishing a mirror image relationship between the product server data volume and the ceph block device; and when a snapshot task is started, simultaneously writing data generated by the application of the production server into the product server data volume and a mirror image volume on the ceph block device, executing a snapshot on the mirror image volume on the ceph block device, and recording a snap time point and snap information to the backup server to bring convenience for subsequent recovery. The data protection method and system capable of combining with the snapshot function based on the distributed block storage can provide the backup data of which the fault-free rate is above 99.9999%, guarantees that the data can be recovered at any time, and provides data safety guarantee for users.
Owner:EISOO SOFTWARE

Power distribution system probability reliability assessing method based on analytical method

The invention discloses a power distribution system probability reliability assessing method based on an analytical method. The method comprises the steps that a given power distribution network is partitioned into a fault area, an isolation area, a gapless island area and an influence-free area are classified, a fault mode impact analysis sheet base is established, and parameters are initialized; a stimulation clock is initialized, a random number is generated, the minimum non-failure operation time is obtained according to failure rate parameters of all element state models, the fault isolation time and the load band transferring time are worked out, and the stimulation clock is pushed; the fault mode impact analysis sheet base is inquired, classifications of all cells are determined, whether an island is formed or not is judged, and different methods are adopted for processing the island area and the non-island area; the state sample of an energy storage device is established according to the energy storage device electrical charge state probability distribution obtained through the probability reliability calculating method; distribution probabilities of single-time fault indexes of load points are overlapped, and the probability reliability indexes of the loads and the system are calculated. The simulation speed is increased while certain calculation precision is ensured, and the power grid situation is comprehensively reflected.
Owner:STATE GRID CORP OF CHINA +3
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