100results about How to "Guaranteed real-time transmission" patented technology

The invention discloses an ultrasonic helical hole milling device which comprises a spindle support, an ultrasonic sleeve, an inner eccentric sleeve, an outer eccentric sleeve, an amplitude-change pole and a transducer located in the ultrasonic sleeve. The amplitude-change pole is connected with a hole forming tool through a spring chuck, and the hole forming tool is a milling cutter or a grinding wheel. The amplitude-change pole is connected with the transducer through an annular flange which is connected with the inner wall of the ultrasonic sleeve through an annular force sensor used for measuring axial and radial force borne by the annular flange. The ultrasonic helical hole milling device further comprises a helical hole-milling rotation driving device connected with the ultrasonic sleeve, a helical hole-milling revolution driving device connected with the outer eccentric sleeve and a feeding system for driving the spindle support to conduct feeding along the axis of the amplitude-change pole. The invention further discloses a machining method for conducting ultrasonic helical hole milling through the ultrasonic helical hole milling device. The ultrasonic helical hole milling device and the machining method have the advantages that the hole forming quality is high, hole forming quality consistency is good, and machining stability is good.

The invention discloses an exception event detection and double-stream coding-based video monitoring method in the technical field of video monitoring. The method comprises the following steps: initializing operation environment of a system, completing network configuration of the system, and regularly detecting a storage medium and a network connecting state; acquiring video information of a current monitored area, and respectively performing exception detection and double-stream coding processing on preprocessed video data; according to the acquired exception detection result and coding result, starting up alarm linkage, selectively remotely transmitting low-quality bit streams subjected to the first kind of coding in the double-stream coding image information, and performing ring buffer-based exception event storage on high-quality bit streams subjected to the second kind of coding; decoding, displaying and storing the acquired image information subjected to the first kind of coding at a receiving end; and locally storing the acquired image information subjected to the second kind of coding. The method can realize real-time browsing of the video and high-quality historical image check, and has the advantages of low cost, simpleness and reliability, and complete monitoring information.

The invention discloses a differential positioning system and an unmanned aerial vehicle. According to the system, a differential module acquires reference coordinates and positioning data, and calculates differential corrected data according to the reference coordinates and the positioning data; a first controller controls a first data transmission radio module to broadcast the differential corrected data, and controls a first wireless network module to send the differential corrected data to a server; a flight controller receives, by a second data transmission radio module, the differential corrected data broadcast by a mobile reference station, or sends, by a second wireless network module, a receiving request to the server and receives the differential corrected data broadcast by the mobile reference station from the server according to the receiving request; and the flight controller calculates position coordinates of the unmanned aerial vehicle according to the differential corrected data and positioning information output by a positioning module. Therefore, the differential corrected data is transmitted by arranging the wireless network modules and the data transmission radio modules in the mobile reference station, real-time transmission of the differential corrected data can be ensured, and positioning accuracy is improved.

The present invention relates to image processing field, the embodiment of the invention provides a method and system of multiple-screen real-time signal process, the method includes following steps: collecting and aquiring parellel image signal, processing serial / parallel conversion to the image signal, acquiring high speed serial data signal; adopting high speed serial data space division switching techinology, dispatching the high speed serial data signal; processing serial / parallel conversion to the high speed serial data signa, and reducing the parallel image signal; processing scaling, overlapping treatment to the reduced image signal, transmitting the scaled, overlapped image signal to the display device to display. The technical solution of the embodiment of the invention is beneficial to improve the peal-time ability of the image signal transmission, the display quality of the image, reducing cost of the image signal process.

The invention discloses a geographic information data acquisition and display system, including a geographic information acquisition module, a man-machine operation module, a video data acquisition module, a data processing module, an expert evaluation module, a graphics rendering module, a regression calculating module, a prediction analyzing module, a central processor, a database file name automatic generation module, a 360-degree phantom imaging module, a simulation analyzing module, a virtual sensor, a transfer node module and a display. The simulation analyzing module repeatedly executes a simulation analyzing algorithm or a simulation analyzing method and transmits the feedback results to the virtual sensor. The virtual sensor receives the feedback results and automatically displays the data. According to the invention, a Beidou module is adopted to achieve data transmission through short messages, which greatly reduces the cost, ensures the real-time transmission of data, reduces the workload of the workers while achieving the 3D simulation of geographic information and comprehensive simulation and analysis of 3D three-dimensional geographic module so as to provides the reliable basis for corresponding measures.

The invention discloses a lightweight middleware-based networking RFID system, which comprises at least one middleware computer, at least one management computer and a distributed data transmission management module. The management computer is connected with the middleware computer through a network; each middleware computer is provided with a temporary database system and at least one data extraction module; each management computer is provided with a newly read label temporary database, a main database and an information processing module; the distributed data transmission management module allocates the newly read label data in the temporary database system of the middleware computer as required and transmits the data to the newly read label temporary database of the management computer through the network, and the data is processed by the main database and the information processing module of the management computer. The system is simple in structure, easy to construct and expand, low in cost and suitable for medium-sized and small enterprises; and the data distributed on different computers can be conveniently processed.

The invention discloses a method for guaranteeing the transmission quality of security monitoring data in a wireless local area network, belonging to the wireless security monitoring field. The methodof the invention comprises the following steps: 1) wireless nodes register at the access point of the wireless device and provide the configuration information containing the priority of the wirelessnodes to the access point of the wireless device; 2) the access point of the wireless device initializes the bandwidth of each wireless node; 3) access point of the wireless device monitors the communication bandwidth of the wireless nodes and the uplink bandwidth of the access point and judges whether the uplink bandwidth is sufficient or not according to the monitoring result; 4) if not, the bandwidth allocation is performed according to the priority of the wireless nodes; and 5) the wireless nodes automatically regulate the data stream according to the obtained bandwidths. Compared with the prior art, the method of the invention optimizes the network resource, reduces the delay and packet loss rate of data transmission and greatly improves the transmission quality of security monitoring data.

The invention discloses an NB-IoT-based intelligent lock and its control method and cloud platform. The method comprises sending a positioning request to an NB-IoT positioning module of an intelligent lock in response to a locking command to control the locking of the intelligent lock, acquiring positioning data, sending the positioning data to an NB-IoT cloud platform through an NB-IoT communication module, receiving an intelligent lock control instruction transmitted by the NB-IoT cloud platform, analyzing the intelligent lock control instruction, if the intelligent lock control instruction is an intelligent lock locking instruction, locking the intelligent lock, if the intelligent lock control instruction is an intelligent lock locking prohibition instruction, prohibiting locking of the intelligent lock and simultaneously, sending an alarm signal. The NB-IoT-based intelligent lock control method realizes a low cost, low latency and high instantaneity and is stable and reliable. High bandwidth of the NB-IoT guarantees real-time transmission of the intelligent lock. The NB-IoT has low energy consumption so that a battery in the intelligent lock has a long service life.

The invention discloses a method for achieving aeronautical network MAC protocols. The method comprises 1) according to the number of known neighbor nodes, a node broadcasts an access request opening message when the number of the neighbor nodes is greater than a threshold value n; 2) after receiving the access request opening message, every neighbor node sends an access request message to a communicated hop node before service data are transmitted; 3) after receiving the access request message and accurately decoding the access request message, the communicated hop node replies an access request confirmation message in a next frame of access response to inform neighbor nodes allowing transmission; 4) after receiving the access request confirmation message, the neighbor nodes enter service data transmitting processes. The invention also discloses a system for achieving the aeronautical network MAC protocols. The system for achieving the aeronautical network MAC protocols comprises a distributed access request processing module. The method and system for achieving the aeronautical network MAC protocols can maintain the numbers of single nodes and hop nodes simultaneously, ensure network stability and maintain network service amounts within a reasonable level.

The invention provides an information transmission method and an information transmission device, belonging to the field of communication devices. The invention solves the problem in the prior art that the transmission real-time performance and the transmission reliability cannot be ensured at the same time. The method comprises the following steps: adopting an asynchronous communication method to transmit local real-time information to be transmitted; judging whether a receiver of the real-time information receives the real-time information or not; if so, stopping transmitting the real-time information; and if not, adopting the asynchronous communication method to continuously transmit the real-time information. The technical scheme provided by the invention can be applied to the information transmission field.

The invention relates to a kind of encryption and deciphering method of remained difference coefficient breadth in H. 264 standard video information, it characterized in that: based on self adapting updating rule of remained difference coefficient breadth coding middle variable suffiXLength, adopting difference value absolute value which calculates current remained difference coefficient breadth and suffixLength self adapting updating threshold value, then based on the difference value absolute value, deciding bit number of last bit of the remained difference coefficient breadth which is to be encrypted, video code flow encrypted fulfill the H. 264 standard format. The characteristics of the invention are following: independent on video coder and decoder, video code flow encrypted fulfill the H. 264 standard; complexity of calculation is low, can fulfill the real time requirement of video information process and transmission; not affect the compression ratio; not affect video communication and network fault tolerant of video transmission; secrecy class can be realized; independent on concrete cryptogram arithmetic, it can use different international normal cryptogram arithmetic, the secrecy can achieve level that current technique can not decrypt.

The invention provides a remote sensing satellite system and a video image real-time transmission method thereof. The remote sensing satellite system comprises a satellite imaging device mounted on a satellite and used for acquiring a video image of a target object in real time; a ground receiving device arranged on the ground and used for receiving a video image in real time; and a data transmission device mounted on the satellite and used for transmitting the video image to the ground receiving device. The remote sensing satellite system and the video image real-time transmission method thereof provided by the invention solve the problems of dynamic target detection, recognition and tracking, and satellite rapid application and so on that are difficult to be realized by the existing satellites, so that users can quickly acquire video information of a target area, and the rapid application ability of the satellites in response to unexpected things can be improved drastically.

The invention discloses a four-dimensional direct-current electric process monitoring system on the basis of remote control and an inversion method. The four-dimensional direct-current electric process monitoring system and the inversion method have the advantages that monitoring procedures for data acquisition instruction transmission, data inversion and interpretation processing, visual imagingfeedback and the like are executed at remote control ends, accordingly, data can be quickly inverted and interpreted, and development and evolution characteristics of monitoring objects can be accurately judged by the aid of merits of remote expert consultation; time+space four-dimensional models can be built by the aid of four-dimensional inversion algorithms, four-dimensional linear equation sets and visual imaging can be solved, and accordingly time-dependent continuously variable characteristics and laws of electric abnormal bodies in monitored regions can be truly reflected to the greatest extent.

The invention discloses a power equipment inspection device based on an RFID (Radio Frequency Identification Device) electronic tag. The power equipment inspection device comprises multiple RFID tags, a handheld inspection terminal, a communication network and a data server located in a monitoring center, wherein the multiple RFID tags are respectively adhered to to-be-inspected power equipment and are used for storing communication information of power equipment in a character string way, and the communication information comprises an ID (Identity), the channel type and the channel parameters of the to-be-inspected power equipment; the handheld inspection terminal is used for reading a character string of the communication information, which is stored in the tags, of the to-be-inspected power equipment, and sending the obtained ID, the obtained channel type and the obtained channel parameters of the to-be-inspected power equipment to the data server through the communication network; the data server is used for receiving and storing inspection data of the power equipment so as to enable each inquire terminal to inquire. According to the power equipment inspection device disclosed by the invention, the inspection data can be transmitted to a management center in time, so that technical staff in the management center can know equipment situations in time, and a technical support is provided for inspection staff.

The invention discloses a tourism geography data acquisition and management system which comprises a tourism geography information acquisition module, a satellite video acquisition module, a tourism region route acquisition module, a data processing module, a central processing unit, a three-dimensional projection system, a database and a man-machine interaction module. Data transmission can be realized by adopting a short message communication manner through a Beidou module, so that the cost is greatly lowered, and the real-time transmission of data can also be guaranteed; through the self data integration function, the workload of workers can be greatly lightened, and through applying the holographic projection technology, the three-dimensional display of geography information can be realized, so that the workers can observe and feel the geographic situations of tourism regions personally on the scene; and the database has data cleansing and positioning functions, so that the automatic classification and storage of data can be realized, and the workload of the workers can be lightened.

The invention discloses an integrated wild animal image automatic acquisition device and method, and the device is disposed in a wild animal monitoring region, and comprises a power management module which is used for providing a power supply for the whole device, and carrying out the equipment power consumption monitoring, charging management and power path management; an automatic image acquisition module used for realizing automatic acquisition of wild animal images; wherein the automatic image acquisition module comprises an infrared camera, a photosensitive element, an optical filter, an infrared LED lamp array, an illumination intensity sensor, a main controller and a pyroelectric sensor group; and a peripheral module used for realizing remote transmission, local storage and local preview of the images; the invention has the beneficial effects that the infrared camera is used as a main body, and the power management module, the image automatic acquisition module and the peripheral module are configured, so that the power supply problem of the wild animal monitoring equipment, the image definition problem in a complex light environment, the power consumption problem of the equipment and the like are solved, and the intelligent level of the wild animal monitoring system is further improved.

The invention discloses a secret image sharing method based on the pixel mapping matrix embedding and solves the problems of low capability of the existing embedding method and pixel border crossing. The method is characterized by including before sharing, adopting differential coding, Huffman coding and data conversion to compress secret images, and acquiring shared secret data to improve the secret image carrier embedding capability; designing fresh pixel mapping matrix to guarantee all pixels of carrier images and hid secret image information, and improving the embedding capability; in the embedding process, embedding the shared secret data into the the carrier images through the pixel mapping matrix, acquiring host images, and preventing pixel border crossing; finally, recovering secret images and carrier images through the host images. The method has the advantages that in the secret image sharing process, the image transmitting speed is increased, the real-time transmission is guaranteed on the condition of bandwidth limitation, and the method can be applied to the field of network safety.

The invention provides a real-time bus working state monitoring method and an intelligent bus system. The intelligent bus system comprises one or a plurality of intelligent bus connector units which serve as routes with one another and are used for acquiring working state parameters of all busbars, an intelligent control box and a management device, wherein each intelligent bus connector unit transmits the working state parameters acquired by each intelligent bus connector unit to the intelligent control box by selecting a nearest route path; the intelligent control box is used for receiving busbar working state parameters transmitted by the plurality of intelligent bus connector units by using wireless self-networking technology, carrying out protocol conversion on the received busbar working state parameters and then sending the received busbar working state parameters subjected to the protocol conversion to the management device; and the management device is used for monitoring, managing and controlling working states of buses according to the busbar working state parameters. By implementing the method and the system, the technology of monitoring, managing and controlling the working states of the buses through monitoring the working states of the buses in real time and transmitting a monitoring result to a management center in real time is realized.

The invention discloses an intelligent milling cutter system based on a RFID (Radio Frequency Identification) technology. The intelligent milling cutter system comprises a main shaft mounted on a base of a machine tool; a cutter handle is mounted on the main shaft; a cutter is mounted on the cutter handle; a primary unit is fixedly mounted on the base; a secondary unit is fixedly mounted on the cutter handle; a sensing unit is fixedly mounted on the cutter, is mounted in a position close to a cutting edge of the cutter and is connected with the secondary unit through a conducting wire; the sensing unit is used for sensing the physical quantity of the cutter in the cutting process; the secondary unit is used for on-line sampling of the physical quantity sensed by the sensing unit and transmitting the physical quantity to the primary unit through a wireless transmission channel; the primary unit is used for generating a radio-frequency carrier wave and obtaining data transmitted by the primary unit in the wireless transmission channel. The intelligent milling cutter system completes the simultaneous transmission of energy and data through the same transmission channel, is simpler in structure, more in sensed physical quantity and high in transmission speed, can be used for identity recognition of the cutter and is compatible with an intelligent cutter management system.

The invention discloses a wireless sensor network-based greenhouse temperature control system which includes a video data acquisition module, a sensor module composed of a plurality of monitoring nodes internally provided with Beidou modules, an outdoor environment acquisition module, a central processor, an environmental control module in a greenhouse and a three-dimensional simulation module. Through the arrangement of the sensor monitoring nodes with the Beidou modules, the temperature, humidity, and carbon dioxide concentration in the greenhouse are detected, and control commands of the environmental control module in the greenhouse are output according to detected data through the central processor, so that the environment in the greenhouse is automatically controlled; panoramic videocapture is adopted for video capture, to improve the coverage of video monitoring, and real-time monitoring of the situation in the greenhouse is achieved; through the design of the three-dimensionalsimulation module, the three-dimensional delivery of greenhouse conditions is achieved, monitoring workers can observe the conditions in the greenhouse personally on the scene, and thus various reasonable environmental control schemes can be formulated conveniently.

The invention discloses a low-redundancy compensation method of video transmission packet loss in an erasure channel, which is used for error-free transmission of video data. The low-redundancy compensation method comprises the following steps: processing to-be-transmitted data through a transmitting terminal, adding a few redundancy packets into the data to be transmitted so as to form new data to be transmitted, transmitting the new data to a receiving terminal, and if the packet of data received by the receiving terminal is lost, recovering the lost data through the redundancy packets by the receiving terminal. By adopting the low-redundancy compensation method, the lost data can be recovered through the redundancy packets, so that complete data information can be decoded. By adopting the method, the problems that the transmission is delayed or the decoding is failed as data is required to be retransmitted when the packets are lost in the data transmission process are effectively solved, the real-time property and the completeness of data transmission are ensured, and a packet loss retransmission mechanism is not needed.

The invention discloses a conductivity analyzer system. The system is characterized by comprising a controller module, a conductivity electrode, a conductivity signal processing module, a temperature acquisition module, a power module, an RS 485 communication module and an RS 232 communication module, wherein the conductivity signal processing module consists of an ICL 8038 square-wave generator, an OPA 2704 operational amplifier feedback circuit and an AD637 true virtual value circuit; the control method of the conductivity analyzer system is characterized in that the working process of the controller module (1) comprises an initialization subprogram, an A / D conversion sampling subprogram, a control algorithm subprogram, a controlled quantity output subprogram and a communication interface subprogram. The conductivity analyzer system overcomes the defect of slow data transmission speed in the past, selects an STM32F103 series microprocessor produced by STMicroelectronics NV for use, and is capable carrying out 32-bit data serial processing, thus accelerating the speed of data processing and guaranteeing real-time transmission of data; therefore, the conductivity analyzer system has higher stability and measurement accuracy.

The invention relates to a method for setting a message buffer queue length, and belongs to the technical field of computer networks. According to the invention, an Ethernet buffer queue mathematic model is established according to a queuing theory, and then based on an M / G / 1 / infinitely great queuing model, loss cost of Ethernet communication is calculated; and finally, an Ethernet optimal buffer queue length existing when the minimum loss cost is obtained is calculated, so that the optimal network buffer queue length at present can be dynamically calculated and set according to changes of the Ethernet bandwidth utilization rate, thereby reducing network data queuing time-delay, guaranteeing real time transmission of the network data and reaching an optimal Ethernet bandwidth utilization rate.

The invention discloses a vehicle-mounted Ethernet firewall system and a communication delay determination method and device, and the system comprises at least one terminal firewall, wherein one side of each terminal firewall is connected with a corresponding vehicle-mounted subsystem controller, and the terminal firewalls are used for filtering the data entering / exiting from the vehicle-mounted subsystem controller; and a switch firewall which is connected with the other side of the corresponding terminal firewall and is used for filtering data transmitted between the vehicle-mounted subsystem controllers, wherein the switch firewall is connected with an automobile electronic control unit and is used for filtering data of the in / out electronic control unit. According to the invention, the firewall is deployed according to the network architecture of the vehicle-mounted Ethernet, the protection requirement of communication data is realized in parts, the automobile attack defense effect is improved, and the safety of data transmission of the vehicle-mounted Ethernet is ensured.

The invention discloses a PH water quality analyzer system which is characterized by consisting of a controller module (1), a pH electrode (2), a PH signal data processing module (3), a temperature acquisition module (4), a power supply module (5), an RS485 communication module (6), an RS232 communication module (7) and an expansion module (8). A control method of the PH water quality analyzer system is characterized by comprising an initializing subprogram, an A / D conversion and sampling subprogram, a control algorithm subprogram and a communication subprogram in sequence. In a PH signal processing circuit, a one-step low-pass filter circuit is adopted to effectively filter out ripples, so that the data acquisition accuracy is improved; for the conventional PH meter, the data transmission speed is low; by the adoption of an STM32F103 series microprocessor produced by the ST Microelectronics to realize 32-bit data serial processing, the data processing speed is increased, and the real-time transmission of data is guaranteed.

The invention is applicable for the data transmission field, and provides a data transmitting method, a device and a system. The method includes generating a second data after grouping and encoding a first data; sending the second data to a receiving end, so that the receiving end receives a third data obtained through the transmission of the second data; receiving feedback information returning after the third data which is grouped and decoded by the receiving end; determining whether the feedback information carries requirements for resending the second data; and resending the second data to the receiving end, when the feedback information carries the requirements for resending the second data. The data transmission method, the device and the system effectively solve the problem of incomplete data caused by packet loss in the data transmission process, on the premise of guaranteeing the data transmission timeliness.

The invention discloses a method, a device and a system for transmitting scheduling information. A base station (BS) generates scheduling information contents for user equipment (UE) which needs scheduling, combines and encapsulates the scheduling information contents except the directly administered UE to form combined scheduling information according to UE information directly administered and indirectly administered by all levels of RS, and sends the combined scheduling information; and when the current RS receives the combined scheduling information, if determining that the combined scheduling information contains ID of the directly administered UE, the RS sends the scheduling information corresponding to the ID of the UE to the corresponding UE, otherwise, the RS forwards the combinedscheduling information corresponding to the ID of the next hop RS of the current RS to the next hop RS of the current RS till the combined scheduling information is transmitted to the last hop RS. Byusing the method, the device and the system, the resource expense of the system is saved, the time for processing the scheduling information by the current RS is reduced, and the service quality of real-time transmission of the scheduling information is ensured.

The invention discloses a data processing method for a virtual desktop, and the method comprises the steps of generating a current screen content on a canvas according to a drawing command when the drawing command is received; judging whether the available bandwidth of the current network is greater than a preset value or not; and if so, determining target area content in the current screen content, and performing compressed encoding operation on the target area content to obtain to-be-sent data so as to send the to-be-sent data to the client. According to the method, the real-time transmission of the remote desktop can be ensured on the premise of reducing the sending data volume corresponding to the drawing instruction. The invention furthermore discloses a virtual desktop data processing device, a computer readable storage medium and an electronic device, which have the above beneficial effects.

This invention relates to an inserted wireless encoding device of a dynamic access encode strategy containing a first interface unit introducing outside compressed and encoded video image code stream sequences and a second interface unit transmitting the code stream sequences in the carrier way of electromagnetic wave, a dynamic encoding unit connecting the two interface units in wire and providing a compatibility on the inserted wireless transmission platform to different forms of digital image code streams to finish the dynamic encoding of multiple code stream velocities within the limited wireless resource environment.