268 results about "Periodic maintenance" patented technology

The invention combines cryptographic key management technology with various authentication options and the use of a companion PKI system in a web-centric cryptographic key management security method and apparatus called PXa3(TM) (Precise eXtensible Authentication, Authorization and Administration). The PXa3 model uses a security profile unique to a network user and the member domain(s) he / she belongs to. A PXa3 server holds all private keys and certificates, the user's security profile, including credentials and the optional authentication enrollment data. The server maintains a security profile for each user, and administrators simply transmitted credential updates and other periodic maintenance updates to users via their PXa3 server-based member accounts. Domain and workgroup administrators also perform administrative chores via a connection to the PXa3 web site, rather than on a local workstation. A member's security profile, containing algorithm access permissions, credentials, domain and maintenance values, a file header encrypting key, optional biometric templates, and domain-specific policies is contained in one of two places: either on a removable cryptographic token (e.g., a smart card), or on a central server-based profile maintained for each member and available as a downloadable "soft token" over any Internet connection.

A computerized "smart card" which has a read / write memory and formatted data storage blocks is used to track the life history of one or more associated machine(s) (e.g., vehicles, medical instrumentation and apparatus, business and copying machines, etc.). The smart card can store a variety of information including machine identification, hardware / software specifications, debit / credit, regulated performance, warranty / insurance, maintenance / service and operational transactions that might impact the hardware, software or the intended operation or performance of the machine. The smart card will be equipped to interact with any of a plurality of autonomous reader / writer smart card units and computer-based reader / writer smart card units that may be equipped to interact with any of the plurality of computer databases through the utilization of land or wireless communications links. Preferably, each smart card will be associated with one or more specific machines at the time of sale of the machines, and will be periodically updated at each transaction (e.g., repair, scheduled maintenance, transfer of title, etc.) using reader / writer units operated by service technicians, repair shops, insurance agents, or the like. Thus, upon transfer of title of the machine, the smart card will also be transferred to provide the new owner with a complete life history for the machine. The stored life history can be used for valuation, maintenance scheduling, problem trouble shooting, and other applications. In the case of a single card being associated with a group of machines (e.g., a company with a fleet of cars, trucks or buses, or a company with several photocopiers, etc.), the card can also be used to track the scheduled replacement of individual machines within the group. Provisions are also made to associate new cards with existing machines to track the future life history of a particular machine.

A computerized "smart card" which has a read / write memory and formatted data storage blocks is used to track the life history of one or more associated machine(s) (e.g., vehicles, medical instrumentation and apparatus, business and copying machines, etc.). The smart card can store a variety of information including machine identification, hardware / software specifications, debit / credit, regulated performance, warranty / insurance, maintenance / service and operational transactions that might impact the hardware, software or the intended operation or performance of the machine. The smart card will be equipped to interact with any of a plurality of autonomous reader / writer smart card units and computer-based reader / writer smart card units that may be equipped to interact with any of the plurality of computer databases through the utilization of land or wireless communications links. Preferably, each smart card will be associated with one or more specific machines at the time of sale of the machines, and will be periodically updated at each transaction (e.g., repair, scheduled maintenance, transfer of title, etc.) using reader / writer units operated by service technicians, repair shops, insurance agents, or the like. The stored life history can be used for valuation, maintenance scheduling, problem trouble shooting, and other applications.

A hydraulic-permeation type environmental water-runoff filtration-system applicable to street curb-inlet type drainage-chambers, which generally cooperatively interconnect with street and parking-lot drains. The BLUEBAY-BMP™ pollution-trap provides advantage of community-tailored filtering stages, the preferred embodiment seting forth a convenient user-friendly prefabricated-kit assembly employing a basic build-in-place containment-housing which can be readily adapted to the studied needs of a given community,—without incuring alteration of existing sewer-stormdrains. The uniquely adaptative capability of the containment-housing enables selectively structuring multi-stages of filtration, which progressions address a variety of ecosystem-contaminants, ranging from basic street-refuse and floatable objects, to coarse sediment, finer silt, and comparatively minute albeit environmentally-hazardous petrochemicals, heavy-metals, phosphates, and nitrates;—all of which are readily retrieved from the apparatus confines via periodic maintenance for transfer to appropriate collection handling facilities.

The invention relates to an online monitoring and condition maintenance management system, which is a layered and distributed data management and computer system, faces to a plurality of substation high-voltage equipment and adopts a multi-server level-to-level management system. The online monitoring and condition maintenance management system comprises an online monitoring equipment layer, a substation data network layer and a remote data center. By constructing and applying the management system, the online monitoring system is promoted to be transitioned to an all-round, networked, intelligent and comprehensive condition monitoring, diagnosis and service management system from the traditional isolated and static experimental system. The system provides a powerful technical supporting platform for overcoming periodic maintenance blindness, reducing maintenance times, reducing maintenance expenses, delaying maintenance cycle to the utmost extent, truly realizing condition maintenance for power system operation and management departments and further improving the operation rate of the equipment and the safety of power grids.

An intelligent communications bridge device (“Meterpod”) of a remote Supervisory Control and Data Acquisition (SCADA) system advantageously facilitates monitoring, reporting and control of public utility meters. The Meterpod is an intelligent gateway that installs onto existing metering and monitoring equipment and provides a wireless communications link from the remote equipment being monitored or controlled to the host computer or program tracking or controlling the device providing clear advantages over existing remote telemetry equipment in that it can (1) support any wireless communications protocol, including CDMA, GSM / GPRS, VSAT, and GPRS standards, (2) be installed and configured in minutes by regular maintenance personnel, and (3) provide control capabilities beyond the remote device by utilizing a broad array of additional interfaces (RJ-11, Ethernet, RS-232 and RS-485) that all come standard, supporting customer sites that cannot be monitored using existing fixed wireless or radio frequency (RF) monitoring solutions.

The present invention provides a dynamic password certification system, and comprises an application client, a mobile terminal, an application server module, an information certification module and a short message gateway module. The application server module is connected with the application client, and is used for receiving the user information, sending the user information and / or certification request information to the information certification module, and providing the application service according to the user certification information returned by the information certification module. The information certification module is used for checking the identity of the user according to the user information, so as to generate dynamic passwords; the dynamic passwords and the information of the user mobile terminal of the user are transmitted to the short message gateway module. The short message gateway module is used for transmitting the dynamic passwords to the mobile terminal according to the mobile terminal information of the user. The present invention also provides a dynamic password certification method. The dynamic password certification system requires no periodic maintenance of time synchronism, and has flexibility and security.

A self-regulating solar-heated-and-cooled greenhouse consisting of a thermally-insulated opaque shell, generally formed by a floor supporting east, north, and west-oriented walls supporting a northerly-facing sloping roof, leaving the southern exposure of said shell “open”, said shell incorporating means of regulating the admission or expulsion of air to the greenhouse. Said “open” south face to be sealed-over by a solar energy collecting system comprised of two parallel light-admitting curtain-wall systems, generally vertical in orientation and planar in configuration, with a space between said wall systems forming an enhanced thermal break and of sufficient distance so as to effect periodic maintenance, and incorporating means of regulating admission or expulsion of air to the greenhouse. Said greenhouse further incorporating means of directing excess thermal energy collected during daylight hours into appropriate storage systems either within or without the confines of said greenhouse, and further incorporating means of providing insulation for the south-facing solar-wall systems at night or during inclement weather.

Methods and apparatus for monitoring the print quality maintenance of hand-held printers and insuring the performance of periodic maintenance to maintain optimal print quality.

The invention discloses an indoor positioning and tracking method based on secondary partition and gradient fingerprint match. The method mainly comprises the following steps: acquiring an underlying feature fingerprint library, and acquiring a primary partition dictionary; acquiring a gradient fingerprint atlas, acquiring a multilevel partition classifier according to characteristic fingerprint of a training reference point, and predicting a partition to which the test belongs; positioning step: acquiring the belonging partition by using the multilevel partition classifier, and predicting position coordinates of a to-be-tested positioning point; and finally tracking step: tacking and positioning all kinds of motion modes, predicting current position coordinates and a current movement trajectory by using an indoor motion ranging algorithm and the reference position coordinates in the previous step to complete the periodic position joint tracking and positioning of fingerprint positioning. The generated gradient fingerprint atlas can process time varying effects and RSS measurement diversity of heterogeneous equipment, thereby greatly reducing the periodic maintenance cost of the fingerprint atlas, and the gradient fingerprint atlas can not only guarantee high-precision fingerprint positioning, but also can compress a mobile terminal database and improve the performance.

An automatic job assignment method implemented in a print job management apparatus for processing print jobs in a multiple-printer print shop environment described. Each print job is processed by comparing the printing requirements of the job with capabilities of the printers to find one or more candidate printers that can satisfy all job requirements. Then, from all such candidate printers, one printer is selected by evaluating real-time conditions of the printers, such as wait time, device status, periodic maintenance (PM) count, operation history, job ticket history, etc., and the print job is submitted to the selected printer. The real-time conditions and the order in which they are evaluated are set by the operator. The process can also be run in an alternative mode where one of the candidate printers is selected based on a pre-defined fixed priority preference.

The invention discloses a GIS partial discharging detection system which comprises a partial discharging ultrasonic subsystem and a partial discharging ultrahigh frequency subsystem. The partial discharging ultrasonic subsystem and the partial discharging ultrahigh frequency subsystem are connected with a computer. Further disclosed is a detection method. The detection method comprises the steps of (1) detecting a detected GIS, uploading the detection results to the computer, (2) allowing the computer to carry out data processing and identification on the results detected through the ultrasonic detection method, giving evidences according to the detection results to assign a function value to an elementary probability of a target, namely the assigned probability, (3) calculating evidence space of each GIS fault, and (4) confirming diagnosis results, namely diagnosis types according to diagnosis decisions. According to the GIS partial discharging detection system and method, the partial discharging faults of the GIS can be accurately found, accuracy for identifying the fault types can be improved, maintenance of the GIS is promoted to be developed from periodic maintenance and accident maintenance to state maintenance and reliability maintenance, and detection accuracy is improved.

The invention relates to a multi-agent anomaly detection method based on the Internet of things, which is an anomaly detection method for a wireless multimedia sensor network. In the method, the multi-agent technology is introduced mainly to solve the problem of the abnormal situation in the operating process of the wireless multimedia sensor network. The scheme of the multi-agent anomaly detection system is characterized in that: coordinating through a local agent, and monitoring a local sensor network autonomously, independently and promptly; when the terminal finds that the audio / video and other data are abnormal or the network needs regular maintenance, detecting whether the network is abnormal through issuing global agency; and if the abnormal situation occurs to the network, repairing the network dynamically and autonomously to ensure the correct operation of the network. The method of the invention can promptly detect whether the abnormal situation occurs to the network, and repair the network within a limited period to restore the normal operation of the network. Moreover, the invention can reduce the network congestion rate, balance the energy consumption of the network, efficiently utilize resources of the total network, improve the fault tolerance of the network and ultimately prolong the life cycle of the entire network.

A floor or road saw that includes a multi-speed transmission that includes a neutral position. The transmission does not require the use of belts, polychains or clutches that require regular maintenance and / or replacement. Moreover, the transmission of the saw may be shifted when the transmission is engaged and shifted through a set of gears in a sequential manner. Further, the transmission is well suited for use on saws where power source or prime mover is disposed parallel to the longitudinal axis of the saw.

An automatic job assignment method implemented in a print job management apparatus for processing print jobs in a multiple-printer print shop environment described. Each print job is processed by comparing the printing requirements of the job with capabilities of the printers to find one or more candidate printers that can satisfy all job requirements. Then, from all such candidate printers, one printer is selected by evaluating real-time conditions of the printers, such as wait time, device status, periodic maintenance (PM) count, operation history, etc., and the print job is submitted to the selected printer. The real-time conditions and the order in which they are evaluated are set by the operator. The process can also be run in an alternative mode where one of the candidate printers is selected based on a pre-defined fixed priority preference.

The present invention relates to wireless cellular telecommunication networks and, in particular, to control and management of self organizing wireless cellular telecommunication network. A method for network planning and frequency optimization in LTE networks by determining the optimal base station configuration parameters, comprises a base station initialization, an initial base station configuration, an iterative measurement procedure, an optimization process, a verification of operation, and a periodical maintenance procedure.

The present invention relates to wireless cellular telecommunication networks and, in particular, to control and management of self organizing wireless cellular telecommunication network. A method for network planning and frequency optimization in LTE networks by determining the optimal base station configuration parameters, comprises a base station initialization, an initial base station configuration, an iterative measurement procedure, an optimization process, a verification of operation, and a periodical maintenance procedure.

A railway grinding system is capable of grinding a frog, another switch, or another railway section of interest in situ over a precisely defined path that is unaffected by the geometry of the railway section to be ground. The system includes a frame providing the reference path and a grinding machine movable along the reference path. The grinding tool preferably has at least four degrees of freedom with respect to the reference frame. Versatility can be further enhanced by permitting one grinding tool, such as a cup grinder configured to grind a generally horizontal surface of the railway, to be replaced with another grinding tool, such as a flange grinder configured to grind a generally vertical surface of the railway. The frog grinder can perform either single-event reconditioning grinding or periodic maintenance grinding.

An automatic maintenance-performing method to determine whether a first and a second power supply are operational, and performing a periodic maintenance operation at a predetermined time by supplying an electric power to the second power supply when the first power supply is in an ‘on’ state and the second power supply is in an ‘off’ state, and at the predetermined period without supplying the electric power to the second power supply when both the first and second power supplies are in the ‘on’ state, as a result of the decision. Further, an automatic maintenance-performing apparatus having an automatic maintenance executing unit including a power supplying part having a first power supply to supply an electric power to the control unit and connected to a power plug, and a second power supply to supply the electric power to at least the maintenance unit and connected to the power plug through a power switch, and a maintenance executing part counting time and performing the maintenance operation when the counted time surpasses the predetermined time period. The apparatus and method is provided to an image forming device to prevent ink ejection nozzles from being dried and choked and thereby prevents deterioration of the performance of print heads when the image forming device is on standby or not in use over a period of time, by automatically performing the periodic maintenance operation.

A machine requiring periodic maintenance, such as a vending machine, is retrofitted to include an alert system for notifying a machine operator that the machine requires servicing. The alert system includes one or more sensors to detect default conditions, a voice recorder for storing one or more voice messages corresponding to default conditions, a transmitter for transmitting the voice messages to the machine operator, and a trigger connected to the one or more sensors and the transmitter for selectively initiating the transmission of appropriate voice messages in accordance with predetermined parameters. The voice messages are transmitted over the public switched telephone network (PSTN) to be heard by the machine operator or stored on the machine operator's voice answering system. The transmitter may be a simple auto dialer connected by wires to a nearby phone jack. However, in a preferred embodiment, the transmitter is constructed in similar manner to the transmitter of a cordless telephone in which the monitored machine includes a short range transmitter operating at 900 MHz or 2200 MHz for transmitting a voice message to a corresponding receiver connected to a nearby phone jack. The voice message is then transmitted over the PSTN to the machine operator. The alert system of the present invention may also include a clock connected to the trigger for causing the voice messages to be transmitted only a predetermined times of the day.

The invention provides a photovoltaic module fault diagnosis method, an edge computing processing device and an inverter. Multiple component level power electronic equipment can be controlled to perform IV scanning on respective connected photovoltaic assemblies; the IV curves of corresponding photovoltaic assemblies can be extracted by each component level power electronic equipment; the IV curves meeting a condition can be selected as reference curves, and comparison can be further performed on the other IV curves except the reference curves and the reference curves, so that each comparisonresult can be generated; and fault diagnosis results of each photovoltaic assembly can be generated according to the comparison results. Thus, the dependence on the output of reference assemblies anddata of environmental monitoring equipment like irradiation instruments in the prior is not needed, and the problems of corresponding high costs and regular maintenance of the reference assemblies canbe avoided.

The invention discloses a vibration signal-based on-line detection method for a braking characteristic parameter of a high-voltage circuit breaker, and relates to a detection method of the high-voltage circuit breaker. Currently, a power system mostly uses a prevention experiment method during periodic maintenance to understand the characteristic parameter of the circuit breaker, time and labor are wasted by the method, the action reliability of the circuit breaker can be reduced by frequent operation and excessive disassembly and maintenance, and certain adverse impact is brought. Acceleration sensors are used and are respectively arranged on a spring operating mechanism and a circuit breaker cross beam to acquire two paths of vibration signals, a motion time parameter of the circuit breaker during the breaking process is extracted by a multi-path vibration signal, relatively good effects on measurement accuracy and stability are achieved, and a new idea is provided for on-line extraction of the characteristic parameter of the circuit breaker. With the method disclosed by the technical scheme, the problems that off-line test is needed by a traditional measurement method and sensorinstallation is complicated are solved.

A task reliability state-based manufacturing system predictive maintenance method is disclosed and comprises the following steps: in a first step, a manufacturing system underlying database is built; in a second step, device performance variation trends and all relevant parameters are analyzed via use of underlying data; in a third step, corrective maintenance cost of a device is predicted; in a fourth step, planned maintenance cost of the device is predicted; in a fifth step, processing capability loss cost of the device is predicted; in a sixth step, indirect loss cost of the device is predicted; in a seventh step, product quality loss cost of the device is predicted; in an eighth step, comprehensive cost is predicted, a task reliability threshold value of the device is determined, and an optimal predictive maintenance strategy is further determined; in a ninth step, task demand of the last device is determined according to a result of the eighth step, and the second step to the eighth step are repeated till a predictive maintenance strategy of a whole manufacturing system is made; in a tenth step, via the above steps, an aim of combining device performance conditions with production tasks is attained, and problems of conventional neglect of production states and blind periodic maintenance can be solved.

The invention belongs to the technical field of system reliability analysis and design, and particularly discloses a nuclear power equipment system reliability assessment method, which comprises the following steps: firstly, carrying out fault mode and influence analysis on equipment according to functional structure decomposition and related fault information of nuclear power equipment; establishing a fault tree model of the equipment based on a fault tree analysis method; then, establishing a reliability prediction and distribution model of the equipment; establishing a reliability analysismodel considering common cause failure; On the basis of previous analysis, after maintenance factors in the service period are considered, a maintenance strategy analysis model based on reliability isestablished to formulate a periodic maintenance strategy; and finally, based on a human factor engineering simulation platform, establishing an equipment inspection and maintenance simulation model to analyze a specific inspection and maintenance process. The model established by the invention can provide important reference and guidance for actual nuclear power equipment design, operation, maintenance planning and the like.

The present invention relates to a closed loop control system of a press, which pertains to the technical field of a control system of the press. The present invention is mainly characterized in that a coder is connected and arranged at the relevant moving part by an industrial field bus, the industrial field bus is connected with DeviceNet host station, and the DeviceNet host station exchanges data with a PLC programmable logic controller; a touch screen and an office computer adopt a closed loop system which consists of Ethernet and the PLC programmable logic controller; the present operation of a lathe can be reflected in real time under the support of various software programs; by using the closed loop control system, the safety of the lathe can be greatly increased, an automatic production line interface is arranged, the real-time operation information of the lathe can be displayed on the touch screen in the form of character, flow chart, sketch map, and the like, for convenient understanding, the statistics of relevant parts can be carried out according to the design parameters of the lathe so as to remind users of regular maintenance. The present invention can obviously increase the work efficiency and facilitate the arrangement and statistics of the work for supervisors.

The invention provides a method for reducing deposits in a reaction cavity of a metallic etching technique. The method comprises the following steps that: a dielectric layer is formed on the surface of a substrate which is provided with an MOS semiconductor component and an aluminum metal conducting layer is arranged on the dielectric layer; a patterned photoresist coating is arranged on the aluminum metal conducting layer and used as a mask for performing general etching technology; after etching is finished, carbon tetrafluoride and hydrogen nitride gas are added. The carbon tetrafluoride can reduce aluminum erosion caused by aluminium trichloride in the prior art; the carbon tetrafluoride and the hydrogen nitride gas react with polymers which are deposited on the inner wall of the reaction cavity, equipment in the reaction cavity and the sidewall of the aluminum metal conducting layer, thereby the effect of reducing the deposits can be achieved and the frequency for periodic maintenance is reduced; moreover, the mean interval for secondary cleaning is prolonged and the cost is saved.

Proximity switches include a hermetically sealed unit that can be used in harsh environments and under significant pressures, such as underwater and in nuclear power facilities, without having any parts that would require replacement or periodic maintenance. The proximity switches are preferably switches actuated by physical movement of a contact in response to changing magnetic forces. The switches are preferably disposed in a body tube optionally including a hermetic seal assembly to seal an open end of the body tube and / or a ferrule that prevents electrical wires attached to the switch inside the body tube from being pulled away from the switch. Further, the switches preferably maintain a contact pressure between electrical contacts sufficient to withstand acceleration seismic testing of 10 g with no contact discontinuity.

A floor or road saw that includes a multi-speed transmission that includes a neutral position. The transmission does not require the use of belts, polychains or clutches that require regular maintenance and / or replacement. Moreover, the transmission of the saw may be shifted when the transmission is engaged and shifted through a set of gears in a sequential manner. Further, the transmission is well suited for use on saws where power source or prime mover is disposed parallel to the longitudinal axis of the saw.

The invention discloses a water supply control method without an external sensor, and relates to a water supply control method. At present, periodic maintenance is required in a daily use process in order to ensure normal use of the sensor, thereby greatly lowering the reliability of the conventional energy-saving water supply system and remarkably increasing the difficulty and cost of subsequent maintenance. The water supply control method comprises the following steps: (1) establishing a database, and storing a corresponding relation table of lift and flow and a corresponding relation table of the detection power and flow of a frequency converter in the database; (2) acquiring the detection power of the frequency converter; (3) inquiring the current flow value of the database according to the detection power of the frequency converter and acquiring a corresponding current lift value according to the current flow value; (4) performing water supply control according to a selected water supply way, wherein water supply ways comprise constant-pressure water supply, constant-flow water supply and proportional water supply. Through the technical scheme, a plurality of problems in the application of the external sensor are solved, the purchasing and maintaining costs of a system are reduced, and the reliability of the system is remarkably enhanced.