10results about How to "Flexible networking" patented technology

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 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 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 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 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 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.