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

A CAN bus data transmission method adopts the methods of dynamically changing frame priority, frame sequential control, a multiframe response mechanism, a multiframe selection strategy and the like to improve the reliability of CAN bus big data transmission; the priority of the first frame and the last frame of multiframe data is higher than common data, so the two frames can not be affected by the common multiframe data, and the normal receiving of important control information such as frame identity, frame length, frame check code and the like is ensured. For the multiframe response mechanism, frame head response and frame end response are added, so the effective receiving of the frame head, and the same time the condition that the frame head is error but continuously sends data is avoided, thus effectively saving the bus brad width, and improving the transmission efficiency; the frame end response contains error frame number, which makes the data transmitting terminal get the error frame number as quick as possible, so only the error frame number is re-sent, and the all the frame numbers are not needed to re-send to waste the bus band width. The invention greatly improves the reliability of receiving and sending of the CAN bus big data block, has a certain error detection and correction function, widens the application level of the CAN bus, and improves the robustness of the network system.

The invention discloses a two-dimensional code, RFID (radio frequency identification) and GPS (global positioning system) trinity based electrical product positioning system and a positioning method thereof. The system is characterized by comprising a plurality of electrical products, handheld devices, servers and a positioning and monitoring platform; each electrical product is provided with a two-dimensional code card, an RFID tag and a GPS monitoring terminal; the handheld devices are used for reading the two-dimensional code cards and RFID tag information of the electrical products; the servers are loaded with information of the electrical products; the positioning and monitoring platform is used for displaying locations and distribution information of current operating electrical products in the background in real time; the GPS positioning terminals and the handheld devices are connected with the servers through wireless networks, and the servers are connected with the positioning and monitoring platform through the wireless networks or wired networks. The system has the advantages of completeness in function, high operability, convenience, rapidness, high efficiency and the like, and is applicable to links such as production and manufacture, circulation and sales, after-sales service or scrap recovery of the electrical products.

The invention discloses a part tracing method and a part identifying method. The part tracing method and the part identifying method are based on a two-dimensional code. Production information is encoded according to a preset encoding rule to obtain the corresponding two-dimensional code, and the two-dimensional code is printed on a part to identify the part; correspondingly, the two-dimensional code on the part is identified and parsed to acquire generation information of the part, and the part is traced. Due to the fact that the identification degree of the two-dimensional code is high, the two-dimensional code can be correctly identified and read even the two-dimensional code is partially damaged by perforation, contamination and the like, and the largest damaging area for guaranteeing correct identification can be up to 50 percent. Therefore, compared with a method for identifying and tracing by a plain code in the prior art, the part tracing method and the part identifying method have the advantages that the success rate and accuracy for tracing parts are improved, and the problem that tracing is failed when an identification code is damaged is solved to a great extent. Compared with the plain code, the two-dimensional code has the advantages of high fault-tolerant ability and a fault-correcting function; the amount of information storage is large, so that the part tracing method and the part identifying method have more advantages than the prior art.

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 relates to a two-dimensional code data cross-network transmitting platform, in particular to a platform which utilizes a two-dimensional code to realize data cross-network transmitting. A unidirectional data transmitting equipment comprises two PC (personal computer), two display devices and two cameras. The two-dimensional code data cross-network transmitting platform consists of at least two groups of data transmitting terminal systems in a cooperated way, wherein each data transmitting terminal system is respectively connected with the corresponding display device and the corresponding camera by the corresponding PC, and a two-dimensional code generation device and a two-dimensional code identification device are arranged in each data transmitting terminal system; the camera of each data transmitting terminal system is cooperated with the corresponding display device; each data transmitting terminal system data transmitting terminal system is used for controlling the data transmitting authority and the transmitting format type in an authorizing way, so as to ensure the reliable, safe and complete data transmission. The two-dimensional code data cross-network transmitting platform has the advantages that the safety and reliability are realized, the practicality is high, the cost is low, and the like.

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 sound wave safety payment method and system. The method includes the steps that a payment end establishes an order and acquires transaction information corresponding to transaction data of the order from a network end database, the transaction information is encrypted through a secret key and subjected to RS coding to generate data frames, then the data frames are subjected to phase shift keying modulation to generate audio frames, and corresponding audio is played; after acquiring the audio, the payment end performs phase shift keying demodulation on the audio to generate data frames, the data frames are subjected to RS decoding and then decrypted through a pre-stored secret key to generate the transaction information, then corresponding transaction data are acquired from the network end database through the transaction information and displayed, and next, a transaction confirming instruction corresponding to the transaction data is sent to the network end database; after the transaction confirming instruction is received, payment operation is performed on the corresponding transaction data by the network end database. The payment method and system are convenient and safe to use.

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 the technical field of electronics, in particular to a solar anti-counterfeiting and tracing identification system. The solar anti-counterfeiting and tracing identification system mainly comprises a two-dimensional code 1, a two-dimensional code scanning / information display apparatus 2 and an information operation device 3, wherein the information operation device 3 comprises a data information storage module 31 and a wireless signal receiving / feedback module 32; and the system is characterized in that the two-dimensional code 1 is a laser two-dimensional code on the surface of lower-layer glass in a solar double-glass assembly. The system has the beneficial effects that the laser two-dimensional code is wide in storage space range and large in capacity; and the two-dimensional code laser-printed on a glass material is long in service life, so that a product can be traced perpetually.

The invention relates to the technical field of important node identification of an electric power transmission network, in particular to a method for evaluating the importance of nodes of a low-voltage transformer area communication network. The method comprises the following steps: reading the service flow of a system line in a normal state; simulating a node fault to calculate a system serviceflow fluctuation Tille entropy; calculating a service importance index of each node; obtaining an approximate centrality index of each node; calculating a comprehensive importance index of each node in combination with the indexes; checking whether all nodes are traversed or not, and if so, entering the next step; if not, returning to the step of calculating the system service flow fluctuation Tille entropy; and sorting the importance degrees of the nodes according to the comprehensive importance degree indexes. The invention aims to overcome the defects that a method special for evaluating the importance of the communication network node of the low-voltage transformer area does not exist in the prior art and an existing calculation method for the importance of the communication network node is not accurate enough, and provides an accurate evaluation method special for the importance of the communication network node of the low-voltage transformer area.

The invention discloses an intelligent power-saving inlet wire main cabinet, and relates to an electric control cabinet. A closed loop integrated electronic circuit is connected with each control circuit of the power-saving inlet wire main cabinet, so that the intelligent power-saving inlet wire main cabinet can achieve intelligent centralized control and is fast in human-computer interface response, high in sensitivity and provided with an error correction function. An energy-saving machine core is connected to a main loop in series, and a purpose of power saving is achieved through automatic on-line switchover of a power-saving loop and a bypass. The intelligent power-saving inlet wire main cabinet can save active energy by 6%-15% for a user and can enable the capacity of a power distribution transformer to be increased by around 10%, and meanwhile can greatly reduce electromagnetic noise and temperature rise of the power distribution transformer and a power distribution room, noise and temperature rise of an electromotor and temperature rise of electric wires and cables, and therefore service life of the intelligent power-saving inlet wire main cabinet is prolonged. A power-saving device and the inlet wire main cabinet are combined into a whole so that the intelligent power-saving inlet wire main cabinet has the advantages of being good in intelligent power-saving effect, small in occupied area, long in service life and high in reliability. Two intelligent low-voltage circuit breakers are adopted by the intelligent power-saving inlet wire main cabinet so that a protection circuit is added to a power supply loop, and stability and reliability of a main circuit are increased.

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 present invention relates to a two-dimensional code-based publication anti-piracy method. The method comprises the steps of reasonably separating content of a publication into two parts that can be carried in different carriers, wherein one part is printed on a paper publication, and the other part is loaded onto a system verification platform, that is, electronic data content; making a two-dimensional code with a unique anti-piracy verification code for each paper publication; scanning, by a user owning the paper publication, the two-dimensional code by using figure reading software, and then transmitting the read two-dimensional code and user information to the system verification platform by using a communication network; and after the system verification platform verifies the two-dimensional code and the user information, acquiring, by the user owning the paper publication, unique authentication by the system for the paper publication, and receiving the electronic data content of the publication. Through adoption of the method, a publication is difficult to share by different readers.

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 discloses a hydraulic pile hammer communication interaction method and a system thereof, comprising the following steps: 1) arranging a hydraulic local communication monitoring station,and arranging the hydraulic local communication monitoring station near the hydraulic pile hammer construction site; 2) arranging a hydraulic expansion operation station to control one or more hydraulic pile hammers in the construction site; 3) numbering the hydraulic pile hammer by the local communication monitoring station, collecting, storing and analyzing the information of the hydraulic hammer in real time, and sending the information to the central communication monitoring station at regular intervals; 4) performing position monitoring and numbering on the local communication monitoringstation within the region by the central communication monitor station, receiving and storing the data information recorded by all hydraulic local communication monitoring stations within the region at regular intervals, and identifying and remotely controlling the hydraulic pile hammer according to the combined number; 5) setting up remote Web production condition monitoring server, which can control any hydraulic pile hammer in the area remotely.

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.

The invention relates to a deep neural network plug-in based on an attention mechanism and an image recognition method. The plug-in is composed of two layers of LSTMs with the same size and a CNN of amulti-layer structure, wherein one layer of LSTM is used for memorizing context information and generating a mask image with remarkable characteristics, and the other layer of LSTM is used for realizing a glance function and generating classification confidence; the CNN of the multi-layer structure is used for down-sampling, extracting image features and transmitting context information to the LSTM unit. By using the CNN of the multi-layer structure and applying the attention mechanism to guide the CNN of the multi-layer structure to focus the key features of the target object in the image and remove the secondary features and the background pixels, the recognition capability is high, the target object is gradually recognized through multiple propagation, the main features of the object are gradually remembered, and the secondary features of the object are forgotten; and through multiple backward feedback, an error correction function is achieved.

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 relates to an application method of a two-dimensional barcode in tracing of an implantable medical instrument. Firstly all the tracing information of the implantable medical instrument is simultaneously coded and then integrated in the two-dimensional barcode and inputted to a tracing management system by using scanning equipment. If the defect of the implantable medical instrument is discovered, the trace and the real-time position of the implantable medical instrument required to be corrected and recalled are traced and found through the tracing management system so as to trackthe patient in time. The tracing information includes the product feature code, the product tracing code, the expiration date of the product, the production date of the product, the product batch number or the product serial number, the quantity, the medical instrument registration certificate number, the date of issue, the validity of the registration certificate and the contact information of the production enterprise of the implantable medical instrument.

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.