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713results about How to "Stable communication" patented technology

Quantum communication apparatus, quantum communication system and quantum communication method

The present invention is directed to realize a stable and highly-efficient quantum communication without being influenced by the jitter of the heralding signal. In regard to the quantum encryption transmitting apparatus 200, the pulse-driven heralded single-photon source 201 generates a photon pair, outputs one photon of the photon pair, and outputs the other photon of the photon pair as a heralding signal. The timing adjuster 202 synchronizes the heralding signal with a clock signal for pulse driving the pulse-driven heralded single-photon source 201, and outputs as a trigger signal. The quantum communication modulating unit 203 implements the signal modulation to a quantum signal, in timing with the trigger signal, and transmits the quantum signal to the quantum encryption receiving apparatus 300 via the quantum communication path 101. The heralding signal transmitting unit 205 transmits the heralding signal to the quantum encryption receiving apparatus 300 via the heralding signal communication path 102. The clock signal transmitting unit 206 transmits the clock signal to the quantum encryption receiving apparatus 300 via the clock communication path 103.
Owner:MITSUBISHI ELECTRIC CORP +1

Urban storm flood monitoring and traffic controlling and guiding system and method

The invention discloses an urban storm flood monitoring and traffic controlling and guiding system and method. The urban storm flood monitoring and traffic controlling and guiding system comprises a water depth data collecting and rectifying unit, a unit for analyzing and predicting water depth and on-off control of a drainage pump station and an early warning issuing and traffic controlling and guiding processing unit. The water depth data collecting and rectifying unit is used for performing comparison and check analysis by collecting water depth data of different types at water accumulating spots and obtaining water depths at the water accumulating spots. The unit for analyzing and predicting water depth and on-off control of the drainage pump station is used for performing trend analysis and rolling correction on the water depths of the water accumulating spots by combining zone rainfall data of surrounding rainfall stations on the basis of the water depths obtained by the water depth data collecting and rectifying unit and achieving automatic on-off of a drainage pump unit according to an accumulating water depth predicting curve. The early warning issuing and traffic controlling and guiding unit is used for processing obtained traffic controlling and guiding information and sending the information to a controller and early warning and instructing pedestrians and vehicle drivers in various manners according to safety pass standards of water-accumulating roads. The urban storm flood monitoring and traffic controlling and guiding system and method have the advantages of being reliable in data, stable in communication, comprehensive in function, professional in handling and the like.
Owner:TSINGHUA UNIV

Galloping positioning system and positioning method of transmission conductors based on micro-inertial measurement combination

ActiveCN102279084AHigh precisionMeet the needs of long-term operation in the fieldVibration testingGyroscopeMathematical model
The invention discloses a transmission line oscillation positioning system based on micro inertial measurement combination. The transmission line oscillation positioning system comprises a monitoring center and a pole and tower monitoring host machine which are connected with each other, wherein the pole and tower monitoring host machine is wirelessly connected with at least two wireless inertialsensor nodes; and each wireless inertial sensor node comprises a triaxial acceleration sensor and a triaxial gyroscope. By the method for positioning by adopting the system, the wireless inertial sensor nodes acquire acceleration values and state space angles of a lead wire monitoring point in three directions; the monitoring center processes and analyzes the data of each monitoring point by adopting algorithms, such as Fourier transformation, a least square method, digital filtering, Kalman filtering, matrix coordinate transformation, frequency domain integral operation so as to fit to acquire an oscillation trace of a whole line, and corrects the oscillation line according to a digital model of a relation between an oscillation characteristic value and a micro meteorological condition; therefore, the precision of oscillation monitoring is improved and the most direct and intuitive monitoring of transmission line oscillation can be realized.
Owner:西安金源电气股份有限公司

Intelligent terminal cabinet for fresh vegetable sale, internet sale system and method

The invention discloses an intelligent terminal cabinet for fresh vegetable sale, an internet sale system and method. The intelligent terminal cabinet is composed of a main control cabinet and a plurality of auxiliary cabinets. A plurality of storage boxes are arranged below each auxiliary cabinet. Each storage box is provided with a refrigeration unit module and a thermal insulation system. The main control cabinet, all the auxiliary cabinets and all the storage boxes are respectively provided a unique ID address. Duplex communication is built between the main control cabinet and a mobile internet through a wire communication module and/or a wireless communication module. A first-stage communication bus is further built between the main control cabinet and each auxiliary cabinet, and a second-stage communication bus is built between each auxiliary cabinet and each storage box arranged below the corresponding auxiliary cabinet. Stable communication is guaranteed when extension is conducted due to the fact that a distribution-typed structure is adopted for the main control cabinet, the auxiliary cabinets and the storage box, and the normal work of other cabinets and boxes cannot be affected when any independent auxiliary cabinet or any independent storage box fails to work properly.
Owner:JINAN NEW GIGANANO LONG DISTANCE MEASURING & CONTROL
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