413results about How to "Simple networking" patented technology

The invention discloses a regional water environment heavy metal monitoring system and an operating method. The regional water environment heavy metal monitoring system comprises a monitoring management system and a plurality of monitoring terminals, wherein the monitoring terminals are connected with the monitoring management system through general packet radio service (GPRS); a central processing unit of the monitoring management system is connected with a data transmitting and receiving module, a data analysis processing module, a database management module and a display or a user terminal; the data transmitting and receiving module is connected with a database storing global positioning system (GPS) information, information geographic information system (GIS) and correlated heavy metal concentration information detected by all the monitoring terminals; a master control module of each monitoring terminal comprises an embedded processor, a clock and a GPRS sub-module; a detection module comprises a temperature sensor and a heavy metal electrochemical sensor array. According to the operating method, the temperature and the heavy metal concentration, monitored by the monitoring terminals, of a water environment are transmitted to the monitoring management system to be stored and displayed, and are compared with standard values and historical data through the data analysis processing module; when the polluted water quality is determined or the concentration of certain heavy metal is suddenly increased to a higher level, an alarm is given. According to the regional water environment heavy metal monitoring system and the operating method, the pollution of a water body is timely found by real-time sampling analysis and dynamic monitoring; the monitoring terminals are simple to network and easy to expand.

The present invention discloses a method, a system, and a node for node interconnection on a content delivery network. This content delivery network includes a first-level CDN node that is formed of a first CDN media server and a first CDN content storage and is configured to provide content for a user, and a second-level CDN node that is formed of a second CDN media server and a second CDN content storage and interconnects with the first-level CDN node, where the first CDN media server accesses the content in the second CDN content storage by using an IP-layer storage access protocol. The networking is simplified and the content access efficiency and the resource utilization are improved by using the technical solutions of node interconnection on the content delivery network provided in the present invention.

The present invention proposes a wireless subscriber identity module, a communication terminal using the subscriber identity module, a method for attaching the subscriber identity apparatus to the communication terminal and a method for controlling the communication by using the communication terminal. The subscriber identity apparatus includes: a subscriber identity module, a wireless network interface module and a central processing unit. The communication terminal includes a central processor, a first interface module for accessing the communication service network and a second interface module for accessing the local wireless network system. The central processor obtains subscriber identity information through the second interface module, attaches a subscriber corresponding to the identity information and makes the corresponding subscriber communicate with the communication service network through the first interface module.

This invention relates to a VLAN aggregation method based on ARP interception, a collection exchange and a system, in which, the method includes: the collection exchange intercepts an ARP request message sent by a source host to a destination host to pick up the ARP list information from the ARP request message and puts it into a local ARP buffer storage list of the collection exchange, utilizing information of the destination host to generate ARP response message to be sent to the source host and corrects the IP message sent to the destination host from the source host and transfers the modified message to the destination host based on the local ARP buffer storage list.

The invention provides an intelligent monitoring system based on a wireless sensor network technology. The intelligent monitoring system comprises monitoring nodes, gateway nodes, a service platform and access terminals, wherein the gateway nodes are in communication connection with the monitoring nodes through a Zigbee wireless network, and used for controlling the monitoring nodes; the service platform is in communication connection with the gateway nodes through a TCP/IP-based network, and used for summarizing data uploaded by the gateway nodes, storing, analyzing, adding up and processing the data, and sending control instructions to the corresponding monitoring nodes through the gateway nodes; the access terminals are in communication connection with the service platform, and used for accessing the service platform and controlling the corresponding gateway nodes and/or the monitoring nodes through the service platform. Compared with the prior art, the intelligent monitoring system provided by the invention can be applicable to various application environments, saves a large number of cables, and is convenient in system layout, simple in networking, and reliable in data transmitting; the reusability of the system is enhanced; the maintenance cost is reduced; the popularization and application of the technology are facilitated.

The invention relates to the field of communication and measurement control and especially relates to a dual polarization transmit-receive waveguide array antenna. The polarization transmit-receive waveguide array antenna includes N broadband dual polarization antenna sub arrays and a polarization adjusting device. Each broadband dual polarization antenna sub array includes a dual polarization opening waveguide array radiation layer and a network feed layer, wherein the dual polarization opening waveguide array radiation layer is arranged above the network feed layer and the polarization adjusting device is arranged below the network feed layer. By adopting the waveguide grid structure for feeding a plate satellite antenna, the working bandwidth of the plate satellite antenna is enlarged,share of transmit-receive of antenna opening and face is realized, radiation grating lobe is reduced and an interface is provided for automatic adjustment of electromagnetic wave polarization direction.

The invention discloses a super-long fabry-perot interferometer gas sensor, which is characterized in that two ends of a hollow-core photonic crystal fiber are fused and jointed with single mode fibers, the core of the hollow-core photonic crystal fiber and the external condition are communicated by the permeable microporous on the optical fiber. The invention further discloses a gas tester adopting the super-long fabry-perot interferometer gas sensor, comprising a frequency sweeping laser, an optical coupler, an induction interferometer cavity adopting a super-long fabry-perot interferometer gas sensor, an interference interferometer cavity, a photoelectric detector, a data receiving and signal processing circuit and a monitoring computer. The invention has the advantages of low cost, small volume, simple system, safety, reliability, high stability, batch production, easy networking, and the application for the component recognition of various mixed gases and high-sensitivity density detection and the like.

The invention provides an oil-gas pipeline safety monitoring early warning method and system. The method and the system are characterized in that a communication optical cable is paved around a buried pipeline (1); one of cable cores is taken as a sensing optical fiber (2); one of the cable cores is taken as a communication optical fiber (3); an optical fiber relay amplifying device (5) is arranged along the sensing optical fiber (2); the communication optical fiber (3) is connected with a detection device (6) and a data and control module (7); the data and control module (7) is used for transmitting a relay control signal of the relay amplifying device (5) through the communication optical fiber (3) to realize real-time adjustment of relay amplification; the relay amplifying device can be used for simultaneously amplifying forwardly-transmitted pulse optical waves and a backwardly-transmitted Rayleigh interference optical signal; detected front and back curves are divided with each other to filter background noise, so that the positioning accuracy is increased. By adopting the method and the system, the influence of background noise is low, detection, identification, judgment and positioning functions specific to multi-point vibration signals along a pipeline are realized, and very high detection sensitivity, positioning accuracy and different event identification accuracies are achieved.

The invention discloses a method and a system for monitoring an oil-gas pipeline in a mining subsidence area and a system constructing method. The method comprises the following steps of: monitoring axial strain of a pipe body with a fiber grating strain sensor, monitoring pipe-soil relative replacement with a fiber grating displacement sensor, and monitoring horizontal deformation of a soil body with a fiber grating sensor; demodulating and preprocessing signals acquired by the sensors, and transmitting the signals to a remote monitoring center; further analyzing and processing data in the monitoring center, and computing horizontal deformation change of a soil body on the top of the pipe in the mining subsidence area, axial strain change of the pipe body and pipe-soil relative displacement change; judging the state stabilities of the pipe body strain change and the soil body strain change, and judging whether the data surpass threshold values; when three parameter values are smaller than respective threshold values, judging that the pipeline is in a safe state; and when the axial strain of the pipe body reaches 70 percent of a pipe body limit strain value, or a pipe-soil relative displacement value reaches a threshold value and keeps constant, or a horizontal deformation curve of the soil body changes suddenly, performing pipeline safety joint early-warning.

The invention discloses an intelligent LED street lamp monitor system based on the ZigBee and Wi-Fi technology. The intelligent LED street lamp monitor system comprises an upper computer, a wireless router, a Wi-Fi module, a ZigBee coordinator and a plurality of sets of monitor terminals, wherein the upper computer is in wireless communication connection with the Wi-Fi module through the wireless router; the Wi-Fi module is in bidirectional communication connection with the ZigBee coordinator through a serial port; the ZigBee coordinator is in wireless communication connection with each ZigBee terminal. Each set of monitor terminals at least comprise one ZigBee terminal, an LED street lamp driver, an LED street lamp and a detection module, wherein the ZigBee terminal is connected with the LED street lamp driver, the LED street lamp and the detection module sequentially in series. The intelligent LED street lamp monitor system has the advantages of energy conservation, intelligent control, convenient maintenance, easy on-spot wiring, low cost, high comprehensive function and the like.

The invention provides an intelligent dimming driver for networking-type high-power packaged LEDs, which comprises a power adjusting system and a digital control system, wherein the power adjusting system is formed by sequentially connecting a single-phase rectifying filtering module, a resonant soft switch inverting module and a transforming and rectifying module which are switched in a single-phase alternating current input power; and the digital control system is formed by connecting an abnormity detection protection module, a sampling detection module, an ARM micro-processor system, a high-frequency driving module, a parameter setting module and a serial bus communication module mutually. The intelligent dimming driver for the networking-type high-power packaged LEDs can automatically match constant current, constant voltage and variable property driving output according to the working property of the high-power packaged LEDs so as to realize remote networking and intelligent dimming.

The invention discloses an automatic tunnel establishing method and an automatic tunnel establishing device. The automatic tunnel establishing method comprises the following steps: inquiring a routing table by a local node to obtain a next hop as a routing table entry of a tunnel; sending a tunnel detection message by the local node, wherein a destination address of the tunnel detection message is a destination address of the routing table entry and a source address of the tunnel detection message is a source address of the tunnel, so that when a node receiving the tunnel detection message determines an own configured tunnel and the destination address can be arrived, the source address is recorded as the destination address of the configured tunnel, and the local node sends a tunnel detection response message, wherein a source address of the tunnel detection response message is a source address of the configured tunnel of the node receiving the tunnel detection message; receiving the tunnel detection response message by the local node, recording the source address of the tunnel detection response message as the destination address of the tunnel of the local node. Through the automatic tunnel establishing method and the automatic tunnel establishing device, automatic tunnel establishment can be achieved and the configuration workload is reduced.

The invention discloses a method for monitoring an oil-gas pipeline in a mining subsidence area based on a fiber grating sensing technology. The method comprises the following steps of: monitoring pipe body axial strain with a fiber grating strain sensor, monitoring pipe-soil relative replacement with a fiber grating displacement sensor, and monitoring soil body horizontal deformation with a fiber grating sensing network; demodulating and preprocessing signals acquired by the sensors, and transmitting the signals to a remote monitoring center; further analyzing and processing data in the monitoring center, and computing mining subsidence soil body horizontal deformation change, pipe body axial strain change and pipe-soil relative displacement change; judging the state stabilities of the pipe body strain change and the soil body strain change, and judging whether the data surpass threshold values; when three parameter values are smaller than respective threshold values, judging that the pipeline is in a safe state; and when the pipe body axial strain reaches 70 percent of a pipe body limit strain value, or a pipe-soil relative displacement value reaches a threshold value and keeps constant, or a soil body horizontal deformation curve changes suddenly, performing pipeline safety joint early-warning.

System to optimize received power at an input to a component in a network element that forms part of an optical network. The system includes a graphical user interface (GUI) that guides an installer to allow optimal setting for a variable optical attenuator (VOA) to be determined, thereby using the VOA to optimize the received power at the component. Power parameters are determined for each card in a signal path from the VOA to the input, and as part of the GUI, the system provides a display of calculated and received power to the user, thereby allowing the user to determine the optimal power setting.

The invention provides a network server, comprising plural tunnel plates and interface plate, where the interface plate comprises a tunnel distributing module, dividing these tunnel plates into plural groups, and distributing a corresponding IP address to each tunnel plate group, and simultaneously, being able to mark weight value of each tunnel plate according to the current tunnel or conversation load to establish tunnel or conversation according to the weight value. According to the weight, it uniformly distributes tunnels/messages to plural tunnel plates, which are united to the outside and implement internal user load balance of network server, thus saving addresses, simplifying networking and fully using system resources.

The invention discloses a method for calculating a work load based on beam surface strain values measured by optical fiber sensors, and aims to utilizing an optical fiber Bragg grating (FBG) technology to measure the beam surface internal strain values and then obtain real-time planar applied bending or torsion work load data. According to the invention, FBG strain sensors are utilized and are pasted on a beam structure at certain intervals, so that the beam is divided into a plurality of regions. By adopting the method, the torque, the bending moment and the shearing force of the cross section where the optical fiber sensor is arranged are calculated, and then the work load value of the region is calculated by utilizing the shearing forces of two adjacent cross sections. Specific embodiment schemes are provided by invention for verifying the precision of the method. Compared with other methods for measuring the work load of the beam in the prior art, the method provided by the invention is interference resistant, time-saving, cost-saving and high in efficiency.

The invention discloses a method for safely upgrading software. The method comprises the following step that: a to-be-upgraded server obtains an upgrading packet and a signature of the upgrading packet and to-be-upgraded equipment checks an own state; if the upgrading packet signature is checked, signature checking of the upgrading packet is passed, the to-be-upgraded equipment runs the obtained upgrading packet. The method can check the validity of the upgrading packet and the own state of the to-be-upgraded equipment, therefore, safety in a process of upgrading the software is improved; furthermore, a software upgrading procedure of the method is simple, a required networking approach is also simple; a upgrading process of the entire software only requires participation of the to-be-upgraded equipment and a server without third-party equipment.

The invention discloses a double thin-cladded long-period fiber grating intensity type magnetic field sensor based on magnetic liquid. The intensity type magnetic field sensor is characterized by consisting of double thin-cladded long-period fiber gratings and magnetic liquid. The invention further discloses a magnetic field tester for the double thin-cladded long-period fiber grating intensity type magnetic field sensor employing the magnetic liquid, comprising an LED light source, a 3dB optical coupler, a double thin-cladded long-period fiber grating intensity type magnetic field sensor employing the magnetic liquid, a photoelectric detector, and a data receiving and signal processing device. The double thin-cladded long-period fiber grating intensity type magnetic field sensor has the technical characteristics of small volume, simple system, excellent stability, safety, reliability, easiness in grid connection, and special advantage that the performance of the sensor can be designed according to actual requirements. Through the adoption of the magnetic field tester, the changes of a magnetic field can be detected on the basis of the changes in the light intensity of the senor under the effect of the magnetic field at a temperature between 0 DEG C and 80 DEG C, and the sensitivity is extremely high, while the measurement resolution of the magnetic field reaches 0.1 oersted in the range from 0 oersted to 1000 oersted.

The invention discloses a monitoring implementation method and apparatus. The method can be applied to a monitoring system including a video server, a video customer, an encoder, an analog matrix and a camera. The encoder and the analog matrix is connected through a serial wire and a video wire, and the encoder transmits the analogue matrix through the video stream sent by the video wire. The method includes steps that: the encoder receives control instructions from the video server or the video client; the encoder converts the control instructions into serial instructions which can be recognized by the analog matrix; the encoder sends the serial instructions to the analog matrix through the serial wire for controlling the analog matrix and the camera connected to the analog matrix. By applying the invention, control to the analog matrix in the digital monitoring system is simplified.

The invention discloses a mine underground intelligent wireless monitoring and positioning system comprising a positioning and monitoring module of a mobile carrier, a wireless and wired communication seamless switching wireless base station, a data analysis processing and transmitting relay station, a ground information system processing workstation and a ground sensor automatic calibration system, wherein the data analysis processing and transmitting relay station receives data from a mobile carrier positioning and monitoring module and data from the wireless and wired communication seamless switching wireless base station via a wireless ZigBee module or a wired industrial CAN bus interface, and sends to the ground information system processing workstation by optical fibers or the Ethernet; the automatic calibration system of a ground sensor carries out wireless communication with the mobile carrier positioning and monitoring module via the wireless ZigBee module. The invention has the advantage of solving the problems of realizing perfect mine monitoring and precise positioning; and because the invention adopts double power supply by batteries and an AC power source, AC is cut off when accidents happen underground, and batteries continue working. In addition, the invention is convenient and simple for networking.