47results about How to "With error correction function" patented technology

The invention discloses a two-dimensional code identification method based on digital signatures and timestamps. The two-dimensional code identification method comprises the steps of performing the digital signatures and stamping the timestamps. Because the timestamps are adopted in electronic identification of the two-dimensional code identification method disclosed by the invention, the signature time can be fixed; the integrity and the authenticity of a time stamp are ensured through the digital signatures; the backdating behaviour can be effectively prevented; the security protection to electronic identity information is enhanced; strong evidences can also be provided for related disputes; and the two-dimensional code identification method disclosed by the invention can be applicable to occasions, such as meeting signatures, entrance guards and payments.

The invention belongs to the network encoding based data distribution technical field, in particular to a data distribution method with the combination of interlaced coding and network encoding. The novel network coding data distribution method provided by the invention is that the coding is synchronously made on a spatial domain and a time domain: the spatial domain adopts linear network coding which can reach the network capacity, and the time domain adopts linear error coding and interlaced coding. The network coding method provided by the invention has the function of forward correction to the noise error produced on the chain during the transmission compared with the general network coding.

The invention relates to an LZW-based lossless data compression and decompression method, and an LZW encoder and decoder. The compression comprises the following steps: reading a character string to be compressed, decomposing the character string to be compressed into a sequence of original phrases, performing coding matching on the sequence of the original phrases and the data in a dictionary, outputting the corresponding characters according to a matching result and obtaining a compressed data stream; selecting two non-negative integers as embedded parameters K and L, dividing a preset message into successive groups of data blocks, wherein each group of data blocks comprises two sub-blocks, and each sub-block is represented by parameters k and l; and embedding the data blocks in the compressed data stream according to k and l and generating a final compressed data stream. According to the LZW-based lossless data compression and decompression method in the invention, for the LZW compressed data stream, a partially encoded codeword is selected and the length of the corresponding compressed character string is dynamically adjusted; the extra message bit is embedded by using the dynamically adjusted codeword phrase mode; under the premise without affecting the overall compression performance of the LZW algorithm, the compatibility and the practicability are strong as the coding rule and the data format are not changed.

The invention provides a permanent magnet brushless direct current motor digital speed regulator. The permanent magnet brushless direct current motor digital speed regulator comprises an upper shell end cover, a middle frame, a lower shell end cover, a rotating speed indicating dial plate, a pointer, a PCB, a three-core single-chip microcomputer, a signal conditioning chip, a VMOS transistor drive chip, a VMOS transistor and a micro-stepping motor. The permanent magnet brushless direct current motor digital speed regulator is characterized in that a steering button, a stop button, a steering indicating light-emitting diode, a stopping indicating light-emitting diode, a speed regulating rotary knob and a speed regulating dial are mounted on the upper shell end cover; rotating speed numerical scales are carved in the rotating speed indicating dial plate, the middle frame is made of aluminum alloy and composed of a middle frame hollow cylinder and a middle frame cylinder hexahedron, and the middle frame hollow cylinder and the middle frame cylinder hexahedron are combined through six connecting lugs; the upper shell end cover and the lower shell cover are connected with the middle frame cylinder, a rotary shaft of the micro-stepping motor is externally connected with the pointer, and under control of the three-core single-chip microcomputer, the position, on the rotating speed numerical scales, of the pointer is the current rotating speed of a permanent magnet brushless direct current motor.

The invention discloses a lift user permission management system and method. The lift user permission management system comprises a lift control device (1), a lift background server (2) and a hand-held device (3), the lift control device (1) is arranged on a lift, the hand-held device (3) is in wireless connection with the lift background server (2), the lift background server (2) comprises a visualization information generation device and a communication module, the lift control device (1) comprises a visualization information reading device, a lift group control device and a processor, and the visualization information reading device and lift group control device are connected with the processor. The lift user permission management system is economical, the other hardware devices are not needed, the operation is convenient to perform, the data communication is safe and reliable, the time is short, and the user permission data updating and synchronization are effectively realized without increasing extra cost.

The invention discloses a method of collecting and transporting household waste using a two dimensional code interaction principle. The method comprises the following steps: (1) a two dimensional code with related information of a waste container is mounted on the waste container, wherein the related information of the waste container includes a waste container name, a waste container photo, a region name the waste container belongs to, a street name the waste container belongs to, a community name the waste container belongs to, a road name of the community, a service population, an address, a current collecting unit, a current collecting vehicle, a person in charge, a contact, a collecting frequency, and a coordinate positioning; (2) a scanner is used to read the two dimensional code of the waste container; (3) according to read two dimensional code information, a waste collecting point is notified; and (4) the waste collecting point according to received information collects waste at a designated place. The method, with the optimal cost, can timely learn the waste collecting and transporting information in various places, can fast process the waste not collected and transported, and can solve the serious pollution problem caused by the waste not timely collected and transported.

The invention relates to a container special for a lithium ion energy storage system and a using method of the container. According to the special container for the lithium ion energy storage system and the using method of the container, cooling and isolating devices are arranged between every two adjacent battery clusters and on one side of the last battery cluster respectively; an electrically operated valve is arranged above each cooling and isolating device; a spray head and a detector are sequentially arranged above each battery cluster; one end of each electrically operated valve is connected with the spray head through a water pipe; the other end of each electrically operated valve is connected with the cooling coil of the corresponding cooling and isolating device through a water pipe; the cooling coils are connected in series; the water inlet ends of the cooling coils are connected with a circulating pump; the water return ends of the cooling coils are connected with the circulating pump through a medium storage tank; and a controller is connected with the circulating pump, the electrically operated valves and the detectors. When the container is in a normal working state, a medium in the medium storage tank is subjected to closed-loop circulation by the circulating pump through the cooling and isolating devices, so that a cooling function is realized; when the detector reaches an alarm threshold value, an alarm is started, the electric valve is opened, the medium in the circulating pipeline is sprayed out from the spray head, and the effects of extinguishing fire, reducing temperature and cooling are achieved.

The invention provides an implementation method of a finite field multiplying unit with functions of detecting, correcting and locating an error. The finite field multiplying unit comprises an error locating unit, an error correction unit based on a redundant base, a finite field multiplication unit and an error detecting unit based on norm; and the finite field multiplying unit has the functions of detecting, correcting and locating the error. The finite field multiplying unit generated by the method has the function of locating the error so as to be convenient for dealing with hardware failure, and has the function of error correction so as to effectively resist the failure attack of an opponent.

The invention belongs to the technical field of information processing and specifically relates to a device for 1553B bus branch relay conversion. The device comprises a motherboard and a power board,wherein the motherboard is used for achieving the function of 4M 1553B bus data reception and relay conversion and introducing external power into the power board through an inter-board stack connector; the power board is used for carrying out secondary conversion on the external power and looping back the motherboard for normal work of the motherboard through the inter-board stack connector; andthe device performs signal and power supply interaction with a 4M 1553B bus system electrical cable through an external connector. The device for 1553B bus branch relay conversion in the invention has a relay function, which can convert the branch of a main bus into a branch of a slave bus; and a plurality of remote terminals can be hooked by extending a terminal from bus length to remote distance. The device for 1553B bus branch relay conversion in the invention does not need a processor for participation; FPGA intelligence is completely adopted to realize bottom-layer data word reception and dispatch, check and relay operations. The device for 1553B bus branch relay conversion in the invention has the advantages of simple structure, small volume, light weight, and low power consumptionand can be widely applied to fields such as aerospace and the like.

The invention provides a private network weather monitoring system based on a digital microwave network, which has the characteristics of wide broadband, high data transmission speed and strong practicality. The private network weather monitoring system mainly comprises a weather monitoring station as well as the digital microwave network and a weather monitoring center which are used for data communication, wherein the weather monitoring station comprises a temperature and humidity sensor, a wind speed and direction sensor, an illumination sensor, a data acquisition card and a processor unit; and the weather monitoring center comprises a communication server, a weather data alarm server, a weather data historical record server, a weather sensor equipment maintenance server and a weather monitoring working station, which are connected in the same network. A digital microwave private network from the weather monitoring station to the weather monitoring center is set up in the digital microwave network so as to form a private network type communication platform with functions of scanning and managing the sensors of the weather monitoring station.

The invention discloses a low-cost and high-performance space computer, comprising: 3 dual-core CPUs, 3 groups of dynamic memories, 3 pieces of program memories, an FPGA for arbitration and bus expansion, a PCIe bus switching chip, and a gigabit network bus switching chip. Dual-core CPU has various types of external interfaces; dynamic memory provides external expansion memory for CPU; program memory provides program storage space for CPU; arbitration and bus expansion FPGA judges and arbitrates the working status of CPU, and selects the HDLC low-speed bus of the CPU on duty External input and output; the PCIe bus switching chip is responsible for concentrating each of the 2 PCIe buses from the 3 CPUs into two external PCIe buses; the gigabit network bus switching chip is responsible for concentrating the 2 gigabit network interfaces Two external front-end network interfaces. The computer not only reduces external nodes, but also ensures signal quality and bandwidth.

The invention discloses a fixed asset information reading system and a work flow thereof, comprising a scanning device and a cloud platform, wherein the scanning device and the cloud platform are connected in the form of wireless communication. By using high density coding, large capacity, good aesthetics, with error correction function, a two-dimensional code with an error rate of not more than one in ten millionth, paste a QR code with fixed asset information on the original equipment, without changing the functionality of the device, without affecting the aesthetics of the equipment, A 2D code is scan by a wireless scanning device to read a fixed asset of that device, Through modern equipment to display fixed asset information in the form of electronic data, greatly reduce the traditional fixed asset statistics and reading consumption of manpower, physics, optimize the management mode of modern human fixed assets, to solve the existing anti-counterfeit technology of the problem of high production costs.

An intelligent control add-on for an elevator comprises a pickup, a camera, an analog switch, a communication module, a connecting cable, a sensing card reading module, a fingerprint collector and thelike which are electrically connected with a digital processor separately, and the connecting cable is in corresponding parallel connection with control button contacts of the elevator separately. Voice recognition is conducted on an elevator control voice command, a corresponding button is switched on, and errors can be corrected; a face image of a passenger is recognized, and the elevator is directly controlled to reach a target floor; an elevator taking authority is recognized through a voice recognition or face recognition function, and card swiping elevator taking is replaced; an authorized user achieves voice collection, face image collection, elevator calling and elevator control command transmission and fingerprint collection through a cell phone application (APP), the user does not need to touch elevator calling and elevator control buttons by using a cell phone for control, and viral or bacterial cross infection is prevented; a built-in car reader replaces an external card reading box of the elevator and is complementary to voice and face authentication; a fingerprint collector is used as a standby authentication means; and the original control function and safety performance of the elevator are not affected at all.

The invention discloses a continuous phase multi-carrier modulation method. A transmitting part carries out serial-to-parallel conversion on a baseband signal, thereby dividing the baseband signal into multiway signals, carries out continuous phase modulation of the same modulation parameter on the divided signals, carries out data array combination on modulated data, carries out IDFT on data arrays, processes the transformed data through lowpass filters, combines all signals, carries out radio frequency transform on the signals and transmits the signals through an antenna. A receiving part carries out radio frequency and serial-to-parallel conversion on the signals received by the antenna, processes the signals through the corresponding lowpass filters, carries out DFT on the processed signals, carries out data array split on the transformed signals and carries out continuous phase demodulation on the split data. According to the method, through utilization of the feature that the spectral efficiency of the continuous phase modulation is high, a bit error rate in a wireless transmission complex environment is reduced, and the transmission capability of a communication system is improved.

The invention discloses an automatic control type variable-frequency hydrostatic-pressure-proof tester which can be used for solving the problems of the existing hydrostatic-pressure-proof tester that the function is single, the measurement accuracy is not high, and the ascending speed of a water container cannot be adjusted and the like. The automatic control type variable-frequency hydrostatic-pressure-proof tester comprises a support box; the support box is internally provided with a motor and a speed reducer; a stand column, a scale and a sample clamp are arranged on the upper surface of the support box; the output end of the speed reducer and the top end of the stand column are respectively fixedly connected with a first chain wheel and a second chain wheel which are matched with each other; the first chain wheel and the second chain wheel are engaged with a transmission chain and the transmission chain is fixedly connected with a water tank; the scale is fixedly connected with a glass tube, and the water tank and the glass tube are communicated with the sample clamp; the support box is provided with an ascending button and a descending button which are respectively used for controlling the transmission chain to be ascended and descended; and the support box is further equipped with a frequency converter which is respectively connected with the motor, the ascending button and the descending button. The automatic control type variable-frequency hydrostatic-pressure-proof tester has the advantages of reasonable design, simple structure and electric lines, comprehensive functions, high measurement accuracy, adjustable ascending speed of a water container, and capability of greatly enlarging the measurement range.