18results about How to "Flexible networking" patented technology

The invention discloses a power distribution network scene low-voltage electric quantity internet-of-things monitoring device and method, and the device comprises a sensing layer, a network layer and an application layer, the sensing layer comprises a plurality of electric quantity collection terminal nodes, and each electric quantity collection terminal node comprises a current transformer, a voltage transformer, a metering chip, a first Bluetooth Mesh communication module and a first power module. And the metering chip converts analog signals acquired by the current transformer and the voltage transformer into digital signals and calculates to obtain voltage, current, power, electric quantity, frequency and other electric quantity parameters. According to the invention, automatic acquisition, wireless transmission, remote monitoring, intelligent analysis and visual display of the electric quantity data of the low-voltage side of the power distribution network can be realized; and meanwhile, an early warning effect can be achieved, early warning can be given out for possible faults of the line, the manual field patrol intensity is reduced, and an Internet of Things solution which is low in cost, high in efficiency, easy to deploy and wide in coverage is provided for low-voltage electric quantity monitoring of the power distribution network.

The invention discloses a ZigBee Internet of Things intelligent agricultural monitoring system based on a cellular technology, which adopts ZigBee to self-establish a wireless cellular network, and environment monitoring sensors and control execution nodes at different positions carry out data transmission and communication with a cellular ZigBee node through an RS-485 bus; each environment monitoring sensor collects corresponding agricultural plant growth environment real-time data, the control execution node controls an execution signal, and the data or the signal is sent to the honeycomb ZigBee node through an RS485 bus; the honeycomb ZigBee node and the intelligent gateway ZigBee node communicate with each other through an ad hoc network, and the intelligent gateway ZigBee node sends the received data to the processor for processing and then stores the data to a server side through cloud transmission. An intelligent agricultural system network is established and various information data transmission and communication are completed through cellular wireless networking, and linkage control of control nodes and environment monitoring is achieved.

The invention discloses a secure communication method based on artificial noise in an unmanned aerial vehicle NOMA network. The communication process has two time slots. In a first time slot, a base station adopts an NOMA mechanism to send a signal to an unmanned aerial vehicle, meanwhile, the unmanned aerial vehicle selects one antenna to send an artificial noise signal to interfere with an untrusted remote user, the remaining antennas receive the signal, and a near user also sends the artificial noise signal; in a second time slot, the unmanned aerial vehicle adds the artificial noise signal and the near user signal of the first time slot by means of exclusive OR, then superposes the obtained signal and the far user signal by means of an NOMA mechanism, and finally reselects one antenna to send the superposed signal; then the NOMA user obtains a corresponding signal to interference plus noise ratio or a signal to noise ratio according to the received signal, and calculates a system outage probability and an eavesdropping probability; the method can effectively weaken the eavesdropping capability of the untrusted user, basically does not affect the untrusted user to receive the own message, and helps to solve the problem of potential safety hazards in an actual unmanned aerial vehicle cooperative NOMA network communication scene.

The invention relates to the technical field of ad hoc network data communication, in particular to an ad hoc network communication routing method and system considering battery residual energy and a medium. According to the method, residual energy virtual hops are calculated according to battery residual energy of a reference node, multipath attenuation and environmental factor influences are considered at the same time, and node receiving signal strength virtual hops are calculated according to signal strength of a transmitting node. In the path selection process, the node receiving signal strength virtual hops and the residual energy virtual hops serve as judgment bases, the routing path with higher quality and stability is selected, transmission along a single path is avoided while transmission reliability is guaranteed, node energy consumption is balanced, and the problems of resource waste and overhigh local node energy consumption are avoided. The reliability and stability of the communication transmission process are ensured, and meanwhile, the node resources are reasonably scheduled, so that the node energy consumption is balanced.

The invention discloses a networking method and device of Internet of Things equipment, electronic equipment and a storage medium, and relates to the technical field of Internet of Things networking, and the method comprises the steps: collecting the feature information of each piece of Internet of Things equipment through an edge calculation node; clustering the Internet of Things devices based on the feature information to obtain a networking result, and monitoring the change of the feature information; and under the condition that the variable quantity of the feature information exceeds a preset threshold value, adjusting the networking result based on the changed feature information. According to the method, the feature information of the Internet of Things equipment is acquired by adopting the edge computing node, and the Internet of Things equipment is dynamically clustered, so that the network structure is adjusted according to the real-time change of the feature information of the equipment, the resource utilization efficiency is improved, the response capability of the system is enhanced, and the user experience is improved. And the Internet of Things equipment can be efficiently and flexibly networked in a complex and changeable environment.

The utility model relates to a combustible gas alarm device and an alarm system. The combustible gas alarm device comprises a detection module, a first communication module, a second communication module, a main controller and an alarm. The main controller is respectively connected with the alarm, the first communication module and the second communication module; the first communication module and the second communication module are mutually independently arranged in the combustible gas alarm device, and the first communication module and the second communication module adopt two non-interfering channels for communication; the detection module is used for detecting the concentration of combustible gas in the external environment of an area where the detection module is located and transmitting an alarm signal to the main controller through the first communication module when the concentration of the combustible gas reaches a preset threshold value. Therefore, the main controller drives the alarm to send out an alarm signal and transmits the alarm signal to a remote server through the second communication module. The system does not depend on a base station of an operator, the data security is higher, the installation is convenient, the networking is more flexible and free, and the risk of signal interference is greatly reduced.

The present invention provides an optical transmission device based on electrical crossover, which adopts multiple SFP interfaces to connect with optical modules, an electrical crossover unit connects multiple SFP interfaces and a control unit, and the control unit is connected to a management port, and generates corresponding control instructions according to different business modes issued by the management port. The optical signal is converted into an electrical signal by the photoelectric conversion of the optical module, and the electrical signal enters the electrical crossover unit. The electrical crossover unit sets the transmission direction of the electrical signal through the corresponding control instruction, and then sends the electrical signal to the designated SFP interface through the electrical crossover unit. The optical module on the designated SFP interface converts the electrical signal into an optical signal output through photoelectric conversion, so that the photoelectric-electrical-optical conversion can be realized, and the conversion between SFP interfaces can be realized. The optical transmission device designed based on the principle of electrical crossover of the present invention has extremely low transmission delay because it only performs photoelectric conversion, and can be applied to a variety of signal transmission scenarios with high transmission delay requirements.

The invention relates to an underground coal mine wireless communication method, belongs to the field of coal mine communication, and aims to solve the standby problem of an underground coal mine mobile terminal. According to the method, signaling is transmitted by adopting a low-power-consumption ZigBee or Bluetooth technology, a media stream is transmitted by adopting a high-bandwidth Wi-Fi6 technology, SIP signaling interaction between a mining mobile terminal and a mining SIP server is carried out through a mining wireless base station, and the media stream is transparently forwarded. The system effectively solves the problems of high standby power consumption, insufficient bandwidth, complex networking and the like in the prior art, realizes low-power standby and high-bandwidth transmission, has the advantages of low cost, high compatibility, convenience in maintenance and the like, and provides reliable communication guarantee for safe production and daily management of a coal mine.

The invention discloses a data compression and decompression method, a data compression and decompression unit, a mobile terminal, a cloud computing center, a communication method and a communication system, relates to the field of satellite communication, and is used for relieving the satellite transmission pressure. The data compression method is configured in the mobile terminal, LZ77 coding is carried out on data blocks with the length meeting the requirement after segmentation to obtain Literals and a triple sequence, Huffman compression is carried out on the Literals, and FSE compression is carried out on a Huffman compression packet; and performing FSE compression on the triple sequence. And configuring a corresponding data decompression method in the cloud computing center. And the plurality of mobile terminals respectively transmit the compressed data to the cloud computing center for decompression application through satellites. According to the method, the compression rate of the short character string data is improved, the stable compression rate is achieved, the transmission pressure of a satellite can be obviously relieved, and data of a mobile communication coverage blind area can be obtained in time.

The invention relates to the technical field of digital information transmission, in particular to a device for selectively calling a remote control or telemetering system of a branch office from a main office. The device comprises trunk line station equipment which comprises a chromatographic analyzer, a component data management PLC (programmable logic controller) and a VPN (virtual private network) server, one end of the component data management PLC is connected with the chromatographic analyzer, and the other end of the component data management PLC is connected with the VPN server; and the far-end metering equipment comprises at least one set of flow computer and at least one set of 5G wireless communication equipment, and the 5G wireless communication equipment is wirelessly connected with the VPN server. According to the natural gas component data synchronization method and system provided by the invention, the problems of small coverage, inflexible networking, low real-time performance, low safety, multiple fault points, complex structure and high cost are solved, and the purposes of flexible networking, wide coverage, high real-time performance, simple system structure, component data synchronization, few fault points, easy maintenance and high safety are achieved.

The present invention provides a mine underground mining area chute ore quantity metering system and method thereof, the mine underground mining area chute ore quantity metering system comprises a computer, an upper wireless substation, a lower wireless substation, a forklift electronic tag and an electric locomotive electronic tag; the computer is respectively connected to the upper wireless substation and the lower wireless substation, and is used to calculate the ore quantity in the chute according to the forklift information of the forklift electronic tag and the electric locomotive information of the electric locomotive electronic tag. The present invention has a simple structure and can quickly measure the ore quantity information in the chute, including the current inventory and flow information within a certain period of time. Moreover, the system has flexible networking, convenient installation, low price, safety and reliability, and stable operation, which effectively overcomes the defect that traditional measurement technology is easily affected by the process environment of the underground mining area, and can help production management personnel flexibly and efficiently dispatch and direct underground electric locomotive transportation operations, so as to achieve energy saving and efficiency improvement for the enterprise.

The application discloses a deep-sea agile communication networking and real-time detection system and relates to the technical fields of underwater communication and optical fiber sensing. The system comprises a water surface buoy system and an underwater system. The water surface buoy system comprises a buoy body, a battery unit, a cable guide joint, a junction box, a cable winch, a solar charging plate and a satellite communication unit. The battery unit, the junction box and the cable winch are arranged in the buoy body, the cable guide joint is arranged at the bottom of the buoy body, and the solar charging plate and the satellite communication unit are arranged at the top of the buoy body. The deep-sea agile communication networking and real-time detection system can be flexibly used in deep-sea sea areas where communication networking or detection is needed, has high integration, is convenient to use and low in cost, can be laid and recovered by using a general marine vessel, can cover several thousand square kilometers of seabed by using a single system, can be conveniently networked between multiple systems to expand the use range, and can be flexibly laid according to actual needs.

The application provides a method and system for customizing deployment of a simulated SDN switch network, comprising: step 1, creating a virtual node for each network node; step 2, configuring the connection of virtual network cards between the virtual nodes on a virtualization platform; step 3, placing a switch system program in a shared directory of a physical host, using remote control to traverse each virtual node, and commanding the virtual node to copy the switch system program from the shared directory to the system directory of the virtual node; step 4, using remote control to traverse each virtual node, and commanding the virtual node to execute the system program immediately or after a delay; and step 5, adding each virtual network card in the virtual node to the port of a virtual SDN switch, and completing the construction of the virtualized SDN network. The application sets a delay waiting mechanism for the switch system program, and realizes fine control over the start time of each virtualized SDN switch.

The invention discloses a wireless transmission system for anti-corrosion monitoring of a drum filter, comprising: a drum filter, a reference electrode, a wireless potential detector, a wireless charging transmitter, a wireless charging receiver and a fixed disk; the fixed disk is fixedly connected to a rotating shaft, and the wireless potential detector and the wireless charging receiver are arranged on the fixed disk; the reference electrode is fixed to the drum filter, the reference electrode is connected to the wireless potential detector signal, the rotating shaft drives the drum filter to rotate, and the fixed disk and the drum filter are relatively stationary; the wireless charging transmitter is arranged on a first supporting seat supporting the rotating shaft, and when the drum filter rotates, the wireless charging transmitter moves relative to the fixed disk; the invention wirelessly transmits parameters collected by the reference electrode to a remote terminal through the wireless potential detector, and wirelessly charges the wireless potential detector through the wireless charging transmitter and the wireless charging receiver. The invention has the advantages of low cost, short construction period, flexible networking and good scalability.

The invention discloses a single-fiber four-way 10G passive optical network using an SFP OLT optical module, comprising a single-chip microcomputer MCU, a 0V to 2V bias circuit, a slow-start power supply, a first laser drive and receiving limiting circuit, a second laser drive circuit, a first avalanche voltage control circuit, a second avalanche voltage control circuit, a semiconductor refrigerator control circuit and a single-fiber four-way optical component; the single-chip microcomputer MCU is respectively connected with the semiconductor refrigerator control circuit, the first laser drive and receiving limiting circuit and the second laser drive circuit; the slow-start power supply provides electric energy for the entire optical module; a gold finger interface is provided on the optical module, and the single-chip microcomputer MCU and other state signal input and output communicate with an external system; the invention is conducive to the transition upgrade of a terminal transmission system, reduces the cost of laying communication equipment and lines, the independent design of the bias circuit reduces the space of the circuit board, realizes a 0V to 2V voltage adjustable circuit, and the networking is simple and flexible.

The application discloses a two-wire synchronous power supply and half-duplex communication device and method, belongs to the technical field of industrial field wired bus and power supply data transmission, and is based on a pure resistance voltage division voltage modulation principle. A host end adjusts bus voltage by controlling on-off of a modulation switch tube, and realizes transmission of a downlink instruction. A slave end extracts a stable power supply from the bus through an LDO, analyzes a bus voltage signal through a voltage comparator, and realizes transmission of uplink data by controlling on-off of the modulation switch tube. The application can realize DC power supply and half-duplex bidirectional communication simultaneously by only two wires, the host and the slave are directly connected in common ground, transmission of ADC common ground sampling signals is supported, the circuit structure is extremely simple, small in size, low in cost, and especially suitable for scenes of low-power active sensor probes and lack of electrical interface resources.

The utility model discloses an electronic detonator initiation system based on wireless radio frequency communication includes: wireless transceiver controller, control system initiation process, sends control instruction, transceiving wireless signal, wireless terminal equipment, with wireless transceiver controller wireless communication connection, with electronic detonator communication connection, receives the control instruction that wireless transceiver controller sent, carries out networking, initiation to the electronic detonator of communication connection with it, reads the current data information of electronic detonator of communication connection with it, the utility model discloses can greatly reduce the use of busbar, has reduced wiring process, has reduced the work load, and networking is more flexible simultaneously.