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 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 provides a video call method and a mobile terminal. The video call method comprises the steps of: when the mobile terminal enters a video call state, detecting the network quality of the mobile terminal; and, when the network quality is not beyond a pre-set threshold value, switching the mobile terminal into the voice call state, receiving and playing the audio data of a voice call, playing a pre-recorded target video clip in the display interface of the mobile terminal, wherein the target video clip is the display picture in the display interface of the mobile terminal within the pre-set time slot in the video call process. By means of the video call method and the mobile terminal provided by the invention, the problem that the user experience is poor due to the fact that the video chatting picture is jammed because of a poor network in the prior art can be solved.

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 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 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 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 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 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 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.