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58results about How to "Quantitative restrictions" patented technology

Optical communication system and arrangement converter

The present invention relates to an optical communication system or the like, which comprises a multicore fiber with a plurality of cores that are two-dimensionally arrayed in a cross-section thereof. In the optical communication system, an arrangement converter, provided between a multicore fiber and an Optical Line Terminal (OLT) having light emitting areas arrayed one-dimensionally, comprises first and second end faces, and a plurality of optical waveguides. The optical waveguides are disposed such that one of the end faces coincides with the first end face and the other end face coincides with the second end face. In particular, the optical waveguide end face array on the first end face and the optical waveguide end face array on the second face are different, contributing to an optical link between network resources of different types.
Owner:SUMITOMO ELECTRIC IND LTD

A kind of optical demodulation method and its optical demodulation instrument based on otdr technology

The present invention relates to the demodulation technology of the fiber grating system, specifically to an optical demodulation method and an optical demodulation instrument based on OTDR technology. The circulator outputs short pulses to the measured optical fiber with multiple fiber gratings in series, and the optical signal reflected by the fiber grating enters the OTDR receiver through the coupler or circulator, and the output signal of the OTDR receiver is sent to the data processing unit; then it can be Tune the light source and set other wavelengths, repeat the above test, and send the data to the data processing unit. The data processing unit integrates the reflection intensity signals of different wavelengths of the fiber grating at the same position to obtain the reflection spectrum of the fiber grating; repeat the above process for the fiber gratings at different positions to obtain the reflection spectra of all fiber gratings connected in series on the optical fiber and / or optical fiber The distribution position of the grating on the optical fiber under test. The invention can break the limitation of the number of sensing heads on the optical fiber to be tested.
Owner:武汉朗睿科技有限公司

UDP (User Datagram Protocol) based data transmission method

InactiveCN101778093ASimple processBroaden the range of interconnectionsData switching networksData transmissionUser Datagram Protocol
The invention discloses a UDP based data transmission method which comprises the steps of: (S1) dividing a file to be transmitted into data pockets and sequencing the data pockets by a transmission terminal so that a receiving terminal can restore the data pockets into a transmitted file; (S2) setting three queues by the transmission terminal, when all data of one data pocket in a data queue waiting for being transmitted is transmitted, waiting for the response of the receiving terminal; and when the receiving terminal gives a response with successful receiving, deleting the information of the successfully transmitted data pocket by a data queue waiting for response; and when the response of the receiving terminal to the data pocket of the data queue waiting for response is time out, adding the data pocket in a re-transmitting data queue for waiting for being added in the data queue waiting for being transmitted to be transmitted again. The invention widens the interconnection of users among networks, greatly improves the network transmission efficiency, can be widely applied in data transmission based on internet technology and can ensure the reliability of data transmission.
Owner:蒋一

Multi-station rapid configuration device and configuration method thereof for FPGA test

The invention provides a multi-station rapid configuration device and a configuration method thereof for FPGA test. A test module sends an operation instruction to a configuration module, realizes selection of operation stations, selection of configuration readback operation type and selection of configuration mode, and receives an operation result returned by the configuration module; the configuration module receives an operation instruction of the test module, and sends the operation instruction to a configuration adapter; and the configuration adapter, according to the operation instruction, finishes configuration of an FPGA chip to be tested and readback of configuration data and sends the readback data to the test module. The multi-station rapid configuration device and method realize configuration operation of a plurality of FPGA chips to be tested simultaneously, and realize readback operation of the configuration data, support selection of multiple configuration modes, are compatible with a plurality of test platforms, and realize isolation protection and dynamic level matching of the configuration adapter and the FPGA chip to be tested; the configuration adapter does not occupy test program vector and channel resources during working, thereby saving storage medium, and simplifying hardware design; and configuration data is flexible to update, and configuration time is saved.
Owner:SHANGHAI FUDAN MICROELECTRONICS GROUP

Method for transmitting data collected by intelligent hardware to data receiving end based on Bluetooth iBeacon broadcast protocol

The invention discloses a method for transmitting data collected by intelligent hardware to a data receiving end based on the Bluetooth iBeacon broadcast protocol. On an intelligent hardware device side, the method comprises the following steps: adding a proprietary protocol to the iBeacon protocol, embedding the collected by intelligent hardware in a user-defined field of an iBeacon frame of the device, and broadcasting a data packet to be received by the data receiving end matched with the same UUID as the hardware device, and analyzing the collected data. On the other hand, the invention further provides an intelligent hardware device for implementing the method and a mobile terminal for receiving the data. By adoption of the method disclosed by the invention, the data communication is simple and effective; the intelligent hardware device responsible for collecting the data does not need to request to connect a host, but unidirectionally broadcasts the data, the Bluetooth data can be automatically connected and sent within the range of the Bluetooth broadcast, the host automatically processes the data, therefore the user experience is good, no interruption feeling is generated, the data reception and processing is executed in the background of the host, and thus the method is particularly suitable for a long-connection monitoring transmission system.
Owner:北京米萌智能科技有限公司

LED string light controller for carrying out control by utilizing DC carrier communication

The invention discloses an LED string light controller for carrying out control by utilizing DC carrier communication. The LED string light controller is characterized by comprising an AC/DC converter, a voltage stabilizing circuit, a microprocessor, a single modulation circuit and a voltage conversion control module; an output end of the AC/DC converter is connected with an input end of the voltage conversion control module through the voltage stabilizing circuit; two output ends of the microprocessor are respectively connected with an input end of the single modulation circuit and a control end of the voltage conversion control module; and an output end of the single modulation circuit is connected with an output end of the voltage conversion control module, and serves as an LED string light output end to be connected with an LED string light. The LED string light controller has the advantages that a power cord is utilized to transfer control signals so that a signal line can be saved and only two lines are required; through communication data, the signal generation of the controller can be realized more easily; the quantity of LED light beads is not limited; and the LED light beads in the LED string light are connected in parallel, so that if one LED is damaged, the other LEDs are not influenced.
Owner:DONGGUAN GUOMENG ELECTRONICS

ONU (Optical Network Unit)-based MAC (Media Access Control) address quantity limitation method and system

The invention provides an ONU (Optical Network Unit)-based MAC (Media Access Control) address quantity limitation method and ONU-based MAC address quantity limitation system. The method comprises the following steps of: detecting whether a source MAC address of a data message from an input port is lacked or not; if so, acquiring a current MAC address quantity of a corresponding ONU according to an outer-layer VLAN (Virtual Local Area Network) of the data message; judging whether the current MAC address quantity of the ONU reaches the upper limit of a pre-set MAC address quantity or not; if so, discarding the data message; otherwise, adding a corresponding static MAC table item corresponding to the data message into an L2 address table. With regard to GPON (Gigabit Passive Optical Network) equipment which does not support the MAC address quantity limitation of the ONU, the ONU-based MAC address quantity limitation method and the ONU-based MAC address quantity limitation system, provided by the invention, are adopted, and ONU-based MAC address quantity limitation is realized on an OLT (Optical Line Terminal) side or a supported GPON chip; the configuration with relatively fine granularity is obtained and requirements on current network access test and actual requirements can be met very well.
Owner:ZHEJIANG CHUANGYI PHOTOELECTRIC EQUIP

Gas detection device and manufacturing method thereof

The invention provides a gas detection device and a manufacturing method thereof. The gas detection device comprises a plurality of detection units and interconnection control lines which are formed on the same substrate, the plurality of detection units are arranged in rows and columns to form an array, and each detection unit comprises a micro hot plate and a circuit unit which is associated with the micro hot plate and comprises a transistor. Each micro hot plate includes: a suspended film supported over a substrate; a heater arranged on the suspended film or embedded in the suspended film; and a pair of measuring electrodes arranged above the heater. The interconnection control lines are arranged to enable the detection units in each row to share the same selection interconnection lines and the detection units in each column to share the same signal interconnection lines, wherein the selection interconnection lines used for different rows of the array are different from one another, and the signal interconnection lines used for different columns of the array are different from one another. According to the invention, addressing and control on each micro hot plate in the array can be realized by reducing devices and connecting lines, and two or more micro hot plates can be independently and simultaneously operated.
Owner:THE HONG KONG UNIV OF SCI & TECH

Server starting method, system, equipment and medium

The invention discloses a server starting method, which comprises the following steps of: responding to power-on of a server, and initializing a virtual sensor warehouse by utilizing firmware; acquiring information recorded by a virtual sensor with a preset flag bit in the BMC so as to apply the information to firmware; in response to the fact that the firmware runs to a preset state or runs abnormally without affecting startup, creating a virtual sensor through a PDR and adding the virtual sensor into the virtual sensor warehouse; recording a running state by using the created virtual sensor; and responding to the firmware to enter the petboot, and sending all the virtual sensors in the virtual sensors to a BMC (Baseboard Management Controller). The invention further discloses a system, computer equipment and a readable storage medium. According to the scheme provided by the invention, a large number of virtual sensors are virtualized through the PDR and are used for monitoring the starting process of the server, so that the limitation of an IPMI protocol on the number of the sensors is avoided, and the starting state of the server can be conveniently detected.
Owner:SUZHOU LANGCHAO INTELLIGENT TECH CO LTD
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