36results about How to "Achieve seamless coverage" patented technology

The invention relates to an automatic license plate identification system at an urban checkpoint, which belongs to the field of monitoring and comprises a coil assembly, a vehicle detection module, a license plate identification module, a front-end module and a network transmission module, wherein the coil assembly is connected to the vehicle detection module, and coils generate a pulse signal when a vehicle passes through the urban checkpoint; the vehicle detection module detects the coils and transmits the received pulse signal to the license plate identification module; the license plate identification module captures a video image transmitted by the front-end module when the license plate identification module receives the pulse signal, finishes the entire video image processing process of the identification of a license plate, and uploads a processing result by a network; the front-end module carries out synchronous exposure, synchronous supplemental lighting and shooting on a camera under the control of a vehicle identification module and transmits the video image to the license plate identification module; and the network transmission module uploads the data of the license plate and the vehicle to a data centre. The system integrates most of the functions in the candid identification of the license plate at the checkpoint by adopting integrated design, reduces the system maintenance difficulty caused by the complexity of the system greatly, enhances the entire stability and reliability of the system, and lowers the maintenance cost of the system.

The invention discloses a whole-process monitoring cold chain logistics system, and specifically relates to the technical field of the Internet of things. The whole-process monitoring cold chain logistics system comprises a cold chain device, a device monitoring management system, and a smart cold chain cloud management system. The cold chain device consists of a storage device and a transfer device. The cold chain device is internally equipped with a data acquisition module, a networking module and a positioning module. The device monitoring management system reads running parameter state data and position data of the cold chain device, and transmits the running parameter state data and the position data to the smart cold chain cloud management system. The smart cold chain cloud management system is connected with a system management background. The system management background is connected with a client. Whole-process cold chain al-parameter monitoring is carried out through the device monitoring management system and the smart cold chain cloud management system. Seamless coverage of the whole system is realized. Standardized and parametric cold chain logistics transportation monitoring and a big-data Internet of things are realized.

The invention discloses two Lagrange navigation constellations and a construction method thereof. One of the two navigation constellations is formed by three Lagrange navigation stars, the three Lagrange navigation stars are respectively positioned in three period orbits, and the three period orbits comprise a first period orbit constructed nearby an earth-moon system translation point L2, a second period orbit constructed nearby an earth-moon system translation point L4 and a third period orbit constructed nearby an earth-moon system translation point L5; and the other one of the two navigation constellations is formed by four Lagrange navigation stars, the four Lagrange navigation stars are respectively positioned in four period orbits, and the four period orbits comprise the above three period orbits, and also comprise a fourth period orbit constructed nearby the earth-moon system translation point L1. The two Lagrange navigation constellations can realize seamless coverage of the moon space in order to provide continuous navigation information for a moon detector.

The invention provides a cell PCI setting method in an LTE network. The method comprises the steps of acquiring an area with the need of PCI setting and dividing the area into a plurality of regular hexagonal cells with the same size, carrying out equidistant clustering on the area according to a preset PCI reuse distance, selecting one cluster in the area as a cell cluster and generating the graph of the cell cluster, receiving inputted available CPI and carrying out CPI setting on the graph of the cell cluster according to different criteria of mod3, and carrying out replication and translation on other clusters in the area of the set cell cluster to complete the PCI setting of the area. The invention also provides a cell PCI setting system in the LTE network, and the cell wireless network PCI setting can be quickly and efficiently completed in the LTE network.

The invention relates to a vehicular integrated dewatering system, which comprises a bearing vehicle, dewatering equipment and auxiliary corollary equipment. The dewatering equipment and the auxiliary corollary equipment are mounted on the bearing vehicle and flexibly move along with the same. The dewatering equipment is used for material filter-pressing and dewatering operations on the bearing vehicle. The vehicular integrated dewatering system has the advantages that the integrated system is complete in function, wide in application and capable of flexibly moving to realize onsite dewatering quantity reduction treatment of scattered industrial and agriculture waste residue, waste residue transport cost is multiply reduced, the equipment can be used for waste residue treatment and collection of various waste residue discharge sources simultaneously, and vehicular integrated dewatering system can be used for dewatering waste residue in a fluid, semifluid and solid state without depending on external environment conditions and can be operated normally in various operational environments. Various scattered resources can be fully collected to create conditions for subsequent industrial, massive and recycling utilization, and social environmental protection can be promoted while resource utilization rate can be increased.

The invention discloses a communication method between a low-orbit satellite and a ground receiving station. It includes the following steps: the LEO satellite determines whether its current positionis in an area capable of direct communication with a ground receiving station, if located in an area capable of direct communication with a ground receiving station, the LEO satellite communicates directly with the ground receiving station, if located in an area that is not capable of direct communication with a ground receiving station, the LEO satellite chooses a high-orbit satellite which can communicate directly with both itself and the ground receiving station as a relay station, and establishes communication with the high-orbit satellite, and the high-orbit satellite which serves as therelay station relays the communication data between the low-orbit satellite and the ground receiving station. The invention can ensure that the whole orbit of the low-orbit satellite and the ground receiving station always keep communication, and realize the seamless coverage of the low-orbit satellite.

The invention discloses a union positioning method and a union positioning system based on a Beidou-2 satellite and a Chinese ground digital television. The method comprises the following steps of: 1, detecting a satellite signal of a Beidou-2 navigation system on a terminal receiver and determining signal strength of the satellite signal; 2, detecting a television signal in a single frequency network of the Chinese ground digital television on the terminal receiver and determining the signal strength of the television signal; 3, selecting a positioning mode according to detection results anddetermination results; 4, extracting positioning parameters from the received signals; and 5, in the selected positioning mode, acquiring a position where a target is placed according to the positioning parameters and auxiliary positioning information, and providing a time service. In the invention, by combining the Beidou-2 navigation system and the single frequency network of the Chinese grounddigital television for positioning, the selection of optimal constellation is facilitated; the positioning precision of the system is improved; by switching of various positioning modes, the flexibility and the impact resistance of the system are enhanced; moreover, seamless coverage of a positioning area is realized, and the effectiveness of the system is promoted.

The invention discloses a low-orbit satellite communication method. It includes the following steps: the LEO satellite determines whether its current position is in an area capable of direct communication with a ground receiving station, if located in an area capable of direct communication with a ground receiving station, the LEO satellite communicates directly with the ground receiving station,if located in an area that is not capable of direct communication with a ground receiving station, the LEO satellite chooses a high-orbit satellite which can communicate directly with both itself andthe ground receiving station as a relay station, and establishes communication with the high-orbit satellite, and the high-orbit satellite which serves as the relay station relays the communication data between the low-orbit satellite and the ground receiving station. The invention can ensure that the whole orbit of the low-orbit satellite and the ground receiving station always keep communication, and realize the seamless coverage of the low-orbit satellite.

The invention provides a power cable multi-state comprehensive online monitoring system and a method for calculating cable core temperature. The system includes a terminal node, a center node and a data management platform, the terminal node includes a plurality of monitoring units, each monitoring unit includes a monitoring point, a sensor, a data acquisition module and a wireless transmitting module, an output end of the sensor is connected with an input end of the data acquisition module, an output end of the data acquisition module is connected with an input end of the wireless transmitting module, and the wireless transmitting module sends data information to the center node; and the center node includes a center node module and a GPRS transmitting module, the center node module is connected with the GPRS transmitting module, the GPRS transmitting module uses a GPRS network to upload data to the data management platform, and the data management platform analyzes the state in which a power cable is according to the received data information. The power cable multi-state comprehensive online monitoring system provided by the invention can timely and accurately discover insulation defects of the cable, and accurately calculate the power core temperature.

The disclosed circuit is composed of main control circuit, ON-OFF control circuit, electrical level conversion circuit, channels switching circuit, input and output interface circuits, and watchdog of hardware circuit. Through ON-OFF control circuit, channels switching circuit, electrical level conversion circuit, and input and output interface circuits in sequence, the main control circuit is connected to hypogyny device electrically. Connected to ON-OFF control circuit and interface of MODEM communication port, the main control circuit controls connection to GPRS IP MODEM. Output of watchdog circuit is connected to input end of main control circuit. The invention makes LT8031 realize seamless coverage without need of fixing IP and host by using advanced GPRS technique. Advantages are: minimum flow charging, providing simpler network interface for users, flexible to select interfaces through jumper, and all sided optimization making development easier etc.

The invention discloses an electric power data management system based on a standard address, and belongs to the technical field of application of a geographic information system (GIS) in electric power production management. The electric power data management system based on the standard address comprises an original data module, a standard address database module, a cloud service module and an application module. The application module provides a visual operation interface and generates different operation requests for a system administrator or an internet user. An operation request is transmitted to the cloud service module to be analyzed, the analyzed cloud service module issues a corresponding instruction, the standard address database module returns corresponding data, and then the corresponding data is matched with an electronic map or big data mining is carried out. The original data module obtains electric power data and map data from the outside of the system, sends the electric power data and the map data to the standard address database module, and performs standardized coding on the electric power data and the map data.

The invention discloses a wireless WiFi multimedia broadcasting system and a wireless WiFi multimedia broadcasting method. A carrier-class WiFi device is used for establishing a coverage system in a limited range; a sending end consists of 7 parts, namely, a program source collecting part, an on-demand program stream multiplexing part, a program stream resynthesizing processing part, a data streams sending and transmitting part, a mobile client receiving part, an adaptive feedback part and a video playing part. A multi-program TS stream is multiplexed on demand into a plurality of data streams in forms of program IP packets, and a network synthesis controller capable of receiving and processing multiple channels of stream media at the same time is constructed, so that the data streams can be sent in a broadcasting manner to achieve simultaneous reception of a large batch of smart mobile phone terminals and simultaneous playing of multiple programs. By a wireless WiFi IP broadcasting technology based on digital TV and other multimedia information, in relatively large service scenes (terminal buildings, meeting places, waiting halls, mobile compartments, residential areas, tourist areas and the like), simultaneous reception of more mobile phones (more than 32) and other smart terminals can be achieved during IP live broadcasting of the digital TV and the other multimedia information.

The invention provides a network seamless covering method and system based on fast access of an 802.11 wireless terminal. The method includes the steps that a fixed AP is set in the position of a pre-access network based on the 802.11 wireless terminal; a multi-user antenna set for receiving signals transmitted based on the 802.11 wireless terminal, shielding interference signals, lowering electromagnetic noise and increasing the system throughput is arranged on the fixed AP; the fixed AP has access to a Mesh network through an MP access point in the Mesh network, and information contained in the received signals is transmitted to the Mesh network to be transmitted. By the adoption of the method and system, in a severe signal-to-noise-ratio environment, communication quality and communication efficiency are improved, the node coverage range is increased, communication blind districts are effectively reduced, the fixed AP is compatible in the Mesh network, a hybrid Mesh network is formed, all terminal equipment can be compatible, seamless coverage is achieved, and the problems that wireless equipment in an existing network is difficult in access, data transmission throughput is low, and network coverage is not complete are solved.

The invention provides a wireless network monitoring system for clinical care. The wireless network monitoring system comprises one or more local area networks, and each local area network includes a terminal, a wireless network base station having a wireless network control function and a radio frequency signal output function, a transmission network having a wireless signal transmitting and receiving function, and a monitoring center having monitoring and analyzing functions for operating states of each wireless network base station and each terminal. The monitoring centers communicate with the wireless network base stations. The wireless network base stations communicate with the terminals via the transmission networks. The wireless network base stations are connected to a power supply and the transmission networks are composed of passive devices. According to the invention, the wireless network monitoring system is high in stability, reliability and security and easy to maintain; the wireless signal quality is not affected by complex building structures, a single set of equipment is used for supporting internal and external network physical isolation and achieving the functions of two products in a traditional scheme, and the cost is therefore saved; and the operating environment is not affected in the installation process, and the installation can be carried out with users on the scene.

The invention discloses an automatic attendance checking method based on NFC (Near Field Communication), which is applied to an electronic class board with an NFC function. The method comprises the steps of collecting attendance checking data transmitted by student equipment when the student equipment approaches through the NFC function, wherein the attendance checking data comprises student identifiers and attendance checking time points stored in the student equipment; and submitting all of the collected attendance checking data to a background server in a unified manner at the arrival of predetermined time so as to enable the background server to perform attendance checking analysis according to the attendance checking data submitted by the electronic class board. The invention also discloses an automatic attendance checking device based on NFC, an electronic class board and an automatic attendance checking system based on NFC, which can realize statistics, analysis and storage of the classroom attendance checking data.

The invention relates to a method for upgrading existing wireless communication base stations and realizing 3G seamless coverage, belonging to the technical field of communication. The construction of a 3G network consumes a large amount of resources, and if sites of the original 2G base stations or the CDMA base stations are used for directly reconstructing equipment, the investment can be greatly saved. However, because the 3G frequency is higher, if the 3G equipment is directly erected at the existing sites, blind areas which can not be covered can appear in the original sites. The invention provides a method for eliminating the blind areas, which enables a filter in the receiving front end of the existing base station to be combined with the superconducting filtering technique, thereby improving the receiving sensitivity of the base station to the maximum extent, simultaneously inhibiting in-band and out-off-band signal interference and background noise interference of 3G signals, greatly improving the signal-to-noise ratio of the receiving front end, effectively expanding the coverage area of the 3G signals, and realizing the seamless coverage of the 3G signals.

The invention belongs to the technical field of safety protection in the varnished wire production industry and particularly relates to an automatic covering device for cover plates of a wire drawing trolley trench. The automatic covering device comprises a left cover plate component and a right cover plate component, and the left cover plate component and the right cover plate component are arranged at two ends of a transport trolley along an advancing direction of the transport trolley respectively. Each of the left cover plate component and the right cover plate component comprises slide plates, and the slide plates share rails with the transport trolley or slide in a reciprocated manner along a transport trolley operating path through independent slide rails. Placement spaces allowing placement of the slide plates in retracting action are reserved at two ends of the trench outside the transport trolley operating path, and one end, towards the transport trolley, of each slide plate extends along the length direction of the trench to be fastened to the corresponding end of the transport trolley. The automatic covering device has advantages of high automation degree, convenience and flexibility in mounting and low cost, seamless covering of the exposed trench can be realized in movement of the transport trolley, and accordingly safety production is guaranteed.

The invention provides a method for determining a carrier-to-interference ratio in multi-beam satellite communication. The method comprises the steps of determining a pointing position of a central axis of each single-beam antenna according to single-beam radiation characteristics and position information of a satellite; determining useful power received by the observer according to the pointing position of the central axis of each single-beam antenna and the angle of the observer deviating from the central axis of the beam antenna; determining the same-frequency interference power received bythe observer according to the pointing position of the central axis of each single-beam antenna and the angle of the observer deviating from the central axis of the same-frequency interference beam antenna; and determining a carrier-to-interference ratio according to the useful power and the same-frequency interference power. The carrier-to-interference ratio obtained by the method is high in precision, and an accurate basis is provided for frequency spectrum planning of a satellite communication system.

The invention relates to a reflective cup set for a light emitting diode (LED) lamp, mainly relates to the technical field of LED lamp illumination, in particular to the optical technical field of LED lamp reflective cups. The reflective cup set comprises a plurality of reflective cups, and is characterized in that the plurality of reflective cups are mutually connected in series, the reflecting surface of adjacent parts of two adjacent reflective cups lean against each other to form a whole, and the ends of the two adjacent reflective cups form a linear sharp edge. By adopting the structure, the plurality of reflective cups are connected in parallel to cover a target plane seamlessly, therefore, the reflective cup set uniformly illuminates the target plane and has high efficiency of light energy utilization.

The invention discloses a passive optical network terminal authentication and authorization system, and a method thereof. The passive optical network terminal authentication and authorization system comprises a registration unit, an authentication and authorization unit and a service configuration unit, the registration unit reports the discovery information of an ONU (optical network unit) terminal device of an EPON or GPON system, obtains user card information of the terminal ONU according to the discovery information and finally reports a registration message of the EPON or GPON system; theauthentication and authorization unit receives the registration information reported by the registration unit, and compares the ONU registration information with the user fulfillment information to perform authentication and authorization on the ONU device; and the service configuration unit receives information passing authentication and authorization, performs matching according to the servicefulfillment information of a user card, and fulfills and issues the service to the ONU terminal. By adoption of the passive optical network terminal authentication and authorization system disclosed by the invention, the problems that when the user ONU terminal device is faulty, the configuration needs to be obtained again, and the user service configuration needs to be downloaded again, and aftera user moves away from the original residential cell is moved away, the original service cannot be used are solved.

The invention relates to a multi-channel transmission unmanned ship information management method. The method is technically characterized in that a multi-channel transmission system comprising a wireless data transmission link, a wireless image transmission link and a satellite communication link is established between an unmanned ship platform and a monitoring system; unmanned ship platform information is integrated and uploaded to a monitoring system through a ship end data transmission radio communication interface; and the information of the monitoring system is integrated and is issued to the unmanned ship platform through a communication interface of the data transfer radio at the monitoring end. The data transmission radio is used as a main transmission channel for uploading key information of a boat platform and issuing a control instruction of a monitoring system, the image transmission radio is used as a data transmission auxiliary channel, and the Beidou short message satellite communication starts a transmitting function only when both the data transmission radio and the image transmission radio fail and is used as an auxiliary channel. According to the technical scheme of the invention, the unmanned ship platform can be continuously monitored by the monitoring system, the real-time transmission of information can be ensured, the interference frequency of Beidou short message communication to satellite navigation can be reduced, and the safe navigation of the unmanned ship is guaranteed.

The invention discloses a space-ground integrated network communication management protocol and method, and the method comprises the steps: transmitting a first message to a target management and control agent, and enabling the first message to be determined through the corresponding configuration of a protocol header in a preset format according to the demands of a user; and receiving a simple response message which is sent by the target management and control agent and corresponds to the user demand, and / or receiving a detailed response message which is sent by the target management and control agent and corresponds to the user demand. According to the method disclosed by the invention, corresponding configuration determination is carried out by utilizing the protocol header in the preset format according to the user demand through the first message, and the corresponding response message can be received according to the protocol in the preset format, so that a unified framework, a unified system and a unified standard are adopted between space-based management and control and ground-based management and control, and wide-area networking seamless coverage is realized.

The invention provides a three-dimensional positioning method and system used in a vertical shaft of a subway construction site and a medium. The method comprises the steps of building a three-dimensional coordinate system corresponding to a vertical shaft region, and determining the coordinates of UWB base stations disposed in different layers of the vertical shaft; carrying out distance measurement on a positioning tag through each UWB base station, screening out error data from summarized data, and discarding the error data; dividing the three-dimensional coordinate system into a plurality of equal cube grids, and sequentially determining a position record of the positioning tag in each cube grid according to the coordinates of the selected UWB base stations, the corresponding distance measurement data and the center point coordinates of each cube grid; and carrying out voting according to the position record of each grid, and determining conclusion coordinates of the positioning tag. According to the method, positioning can be carried out in a whole three-dimensional space of the vertical shaft, a locatable area is expanded, and the positioning accuracy is improved.

The invention discloses a bilateral large-scale distributed MIMO implementation method, a base station and a terminal system. The base station system comprises a plurality of B-DRUs, a B-CPU and a CU, wherein the plurality of B-DRUs are connected to the B-CPU through a high-speed forward link. The terminal system comprises M-DRUs and an M-CPU, and the M-DRUs are connected to the M-CPU through high-speed links. The system works in a time division duplex mode and a frequency division duplex mode. The uplink and the B-DRU complete distributed receiving of uplink signals and jointly decode the uplink signals at the B-CPU or jointly receive and decode the uplink signals at the B-CPU, and the downlink and the base station system complete distributed pre-coding sending at the B-DRU or jointly pre-coding sending of downlink signals by the B-CPU. According to the invention, seamless coverage is realized, switching is thoroughly avoided, any pre-coding can be adopted, multi-stream pre-coding with relatively low complexity is realized, the power efficiency of the system is improved, and the reliability of the system is improved.

The invention provides a network seamless covering method and system based on fast access of an 802.11 wireless terminal. The method includes the steps that a fixed AP is set in the position of a pre-access network based on the 802.11 wireless terminal; a multi-user antenna set for receiving signals transmitted based on the 802.11 wireless terminal, shielding interference signals, lowering electromagnetic noise and increasing the system throughput is arranged on the fixed AP; the fixed AP has access to a Mesh network through an MP access point in the Mesh network, and information contained in the received signals is transmitted to the Mesh network to be transmitted. By the adoption of the method and system, in a severe signal-to-noise-ratio environment, communication quality and communication efficiency are improved, the node coverage range is increased, communication blind districts are effectively reduced, the fixed AP is compatible in the Mesh network, a hybrid Mesh network is formed, all terminal equipment can be compatible, seamless coverage is achieved, and the problems that wireless equipment in an existing network is difficult in access, data transmission throughput is low, and network coverage is not complete are solved.