266 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.

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.

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.

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.

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.

The invention discloses a gas extracting drilling solid-liquid two-phase hole sealing device. The gas extracting drilling solid-liquid two-phase hole sealing device comprises a first capsule bag, a second capsule bag, a third capsule bag, a primary grouting pipe and a secondary grouting pipe, a first hole sealing section is arranged between the first capsule bag and the second capsule bag, and a second hole sealing section is arranged between the second capsule bag and the third capsule bag; and an explosive valve located in the first hole sealing section is formed in the primary grouting pipe, the other end of the secondary grouting pipe is located in the second hole sealing section, and is in communication with the second hole sealing section through a second one-way valve. The inventiondiscloses a gas extracting drilling solid-liquid two-phase hole sealing technology at the same time, a network is connected to perform extracting after the first hole sealing section is subjected tosolid-phase hole sealing, periodic detection of gas extracting concentration is carried out to an extracting drilling hole of which the solid-phase extracting is completed, liquid-phase sealing of thesecond hole sealing section is perform on an extracting drilling hole with gas leakage, and then extracting can be continued. According to the gas extracting drilling solid-liquid two-phase hole sealing device and technology, liquid-phase hole sealing operation can be carried out to an extracting drilling hole with poor hole sealing and the gas leakage, periodic maintenance can be carried out tothe liquid sealing effect, and extracting drilling hole is prevented from densified cumbersome construction.