933results about How to "Real-time transmission" patented technology

The invention relates to a doctor-patient remote alternation platform and a remote alternation method, comprising: a computer system at a server end, a microcomputer device at a medical referral centre institution end, a microcomputer device at a medical referral application end, a microcomputer device at a medical expert end, which are in a wide area network and realize network connection, thereby realizing facial transmission in a broadcasting mode, medical image of real-time transmission, remote control automatic microscope platform, and alternation speech communication is present on the basis of sharing real-time medical image. Three perfect remote medical solution with different applications are realized, including a pathology remote consultation solution, a pathology remote medical education solutionand a pathology remote medical communication solution.

The invention discloses a method and device for controlling traffic signals of multipurpose electronic police mixed traffic flow detection. The method comprises the steps that traffic operation conditions of a crossing is monitored by a crossing video camera in real time and detected traffic operation condition information is output to an electronic police processor; the received traffic operation condition information is processed by the electronic police processor arranged in the crossing and traffic flow information obtained through processing is transmitted to a traffic signal controller in real time; statistic analysis is conducted on the received traffic flow information by the traffic signal controller and a real-time traffic signal controlling scheme is generated so that traffic signals of the crossing can be controlled. According to the method and device for controlling the traffic signals of multipurpose electronic police mixed traffic flow detection, the instantaneity of traffic signal control can be improved and the traffic signal control efficiency is improved.

The invention relates to a compression method and belongs to a method of data compression technology in the field of information technology. The method comprises the following steps: inputting large-batch bill images; sorting and sequencing the bill images; utilizing a dynamic image compression algorithm to compress the images; packing and encrypting the images; adopting a dynamic image decompression algorithm to decompress the images and reducing and taking each image picture out; and outputting the batch images after the sorting and reduction. Compared with JPEG 2000, the compression algorithm provided by the invention has the advantages that: the compression speed is improved by 4 times; the size of resulting file of the compression is one-tenth of that of the original image; and after the decompression, the discrimination rate of OCR is kept unchanged basically. Based on the property, the compression method can transmit a real-time image in the network by using only small bandwidth.

The invention provides an intelligent human body sign mobile phone monitoring system, which comprises a human body sign acquisition module, a monitoring mobile phone and a cloud server, wherein the human body sign acquisition module is used for monitoring the body sign signal of a monitored object; the monitoring mobile phone is used for receiving body sign signals of the human body sign acquisition module, preprocessing the body sign signals so as to eliminate baseline drift to obtain preprocessed body sign data, storing the preprocessed body sign data and analyzing the body sign data; and the cloud server is used for receiving an equipment recognition code of the monitoring mobile phone as well as preprocessed sign signals and alarm signals, storing the body sign data and the alarm signals in corresponding items, in a database, of the monitored object, analyzing the body sign data and the alarm signals so as to generate medical advice information and transmitting the medical advice information to the corresponding monitoring mobile phone and preset associated terminal equipment. The monitoring system disclosed by the invention has the characteristics of mobile operation, simple and convenient use, long-term continuous work supporting, diagnosis result intelligent display, abnormal physiological status alarm, wireless data transmission and the like.

The invention discloses a system for treating organic exhaust gas by adsorptive-catalytic combustion. The system comprises a pretreatment filter which communicates with and sucks the organic exhaust gas, a main adsorption fan which exhausts the adsorbed exhaust gas and a main fixed adsorbent bed which is connected between the pretreatment filter and the main adsorption fan through a pipe and usedfor adsorbing the exhaust gas; the exhaust pipe of the main adsorption fan is connected with a gas monitoring apparatus which is electrically connected with a control device; the entrance of the mainfixed adsorbent bed is connected with a catalytic bed through a main desorption fan via a pipe; the exit of the catalytic bed is connected with the exit of the main fixed adsorbent bed through a pipe; a temperature sensor in electric connection with a control device is arranged in the catalytic bed; and the main fixed adsorbent bed is connected in parallel with an auxiliary fixed adsorbent bed which conducts an alternative adsorptive or catalytic process with the main fixed adsorbent bed. The invention has the advantages of effectively guaranteeing the treatment efficiency of the organic exhaust gas, replacing manual operation with automatic control and effectively improving the production safety degree, the equipment operation reliability and the economy.

The invention relates to a programmable multi-axis controller based on an IEEE-1394 serial bus in the technical field of numerical control. The programmable multi-axis controller comprises an IEEE-1394 serial communication interface module, a DSP module, an FPGA module, a differential motion reception module, a DA and operation amplification module, a photoelectric isolation module, a power supply and clock module and an auxiliary module, wherein the DSP module receives motion control information transmitted from the IEEE-1394 serial communication interface module and transmits a generated multi-axis motor pulse instruction to the FPGA module; and the FPGA module outputs the multi-axis motor pulse instruction to the DA and operation amplification module after the storage and frequency division treatment of the instruction so as to complete digital-analog conversion and operation amplification treatment and further control the operation of a multi-axis motor. The programmable multi-axis controller reduces the number of controller elements and the volume of an integrated circuit card, improves the flexibility and the expansibility of a system, and meets the requirements of the multi-axis real-time, high-speed and high-accuracy control in the technical field of numerical control.

The invention discloses an intelligent quality test management system and method of a WLAN (wireless local area network), wherein the method comprises the following steps that: the test mode of a test terminal is set; a service end judges the test mode, if the test mode is an automatic test mode, the service end issues a network quality test task to the test terminal by virtue of a mobile communication network, and the test terminal monitors the quality of the WLAN at a local WLAN access point according to the test task; if the test mode is a manual test mode, the test terminal carries out monitoring according to the manual operation of a user; and then, the test terminal reports monitored data to the service end by virtue of the WLAN; the service end carries out comprehensive analysis, statistic and analysis on the received monitored data and multi-network optimization data such as the network management platform of an operator, a daily maintenance test and the like, and estimates the network quality; and the network quality is shown multi-dimensionally by virtue of a map, a report form and a graph. According to the invention, the universalization of the test terminal, the real-time transmission of the test result and the intelligent analysis on the test result can be realized.

The invention relates to a water environment monitoring system based on ZigBee wireless technology. The current monitoring usually uses a way of wired transmission, which results in difficult routing and high cost. The water environment monitoring system of the invention comprises a plurality of water environment monitoring nodes which are distributed in water environment monitoring regions and a data and video base station, wherein, the water environment monitoring node is based on the ZigBee wireless technology and comprises a node microprocessor module, a node ZigBee radio frequency module CC2420 radio frequency chip, a power management module and a water quality parameter collection module. The data and video base station uses the structure of ARM-DSP dual processors and comprises a base station ZigBee radio frequency module CC2420 radio frequency chip, CDMA transmission module HUAWEI-CM320, a video signal collection module and a microprocessor module. The water environment monitoring system of the invention can simultaneously collect a plurality of parameters of water quality, and has the advantages of strong data communication capacity and wide network coverage area. Moreover, the water environment monitoring system of the invention can realize real-time collection, processing and wireless transmission of video signals.

The invention relates to a wireless image transmission communication system for an unmanned aerial vehicle and a wireless image transmission communication method. The wireless image transmission communication system comprises a digital camera, a control module and a power module, and is characterized in that the wireless image transmission communication system further comprises a wireless communication module for real-time data transmission with a ground monitoring center, the wireless communication module comprises a reconfigurable high-speed digital modulation unit and a digital transmission transmitter, the reconfigurable high-speed digital modulation unit is used for selecting a digital modulation mode to digitally modulate serial data stream according to the modulation mode of a remote control command of the ground monitoring center, the digital transmission transmitter is used for transmitting data by the aid of microwaves, and the reconfigurable high-speed digital modulation unit comprises a series-to-parallel portion, a sampling control portion and a carrier wave multiplication portion. By adding the reconfigurable multi-mode modulator, modulation modes can be changed in an online manner according to the quality of a signal channel environment, and high-resolution image data can be transmitted in real time even in a severe transmission environment.

The invention relates to a water environment monitoring node based on ZigBee wireless technique. The prior technology has long monitoring period and large work intensity, and cannot reflect dynamic variation of water environment. The invention includes an electric power management module, a water quality parameter acquisition module, an MPU module and a ZigBee radio frequency module. The equipment adopts an MSP430F149 MPU, for analyzing and processing water environmental parameter, and controls the operating status of the ZigBee radio frequency module and the water quality parameter acquisition module. The MSP430F149 processor is interconnected to the water quality parameter acquisition module through a 12 bit A / D converter self integrated with the MSP430F149 processor, and is interconnected to the ZigBee radio frequency module through an SPI serial interface, meanwhile also controls a power supply management module to supply power through an analogue switch, so as to achieve the goal of energy-saving. The invention has low cost, and low power consumption; can be arranged in water environment for a long term, execute multiple parameter real time monitoring to the water environment, and complete the high-efficiency transmission of data, thereby having wide applications prospect in the water environment monitoring.

The invention discloses a satellite positioning and static leveling-based layered settlement monitoring system and method. The system comprises a base station, a monitoring station which is arranged in a settlement monitoring area and a monitoring center which communicates with the monitoring station, wherein the base station communicates with the monitoring station; the monitoring station comprises an observation pillar, a second Beidou satellite signal receiver mounted on the observation pillar, a data transmission unit, a plurality of layered settlement marks and a static level system; the static level system comprises a plurality of static level gauges; each layered settlement mark is provided with one static level gauge; one of the static level gauges is arranged on the observation pillar. The method comprises the following steps: I, setting of the monitoring system; II, data acquisition and transmission; III, data processing and analysis. According to the satellite positioning and static leveling-based layered settlement monitoring system and method, the calibration and correction problems of the instable working base points during the static leveling can be effectively solved, and the long-term, remote and real-time monitoring for the layered settlement deformation of the geologic bodies can be realized.

The invention discloses panoramic video coding and decoding methods and devices. The coding method comprises the following steps: a coding end obtains various block coding data of a panoramic video frame, wherein the panoramic video frame is blocked according to the playing position at a playing end; the code rate of each block coding data is determined according to the relative position relationship of the playing position of a block and the current viewpoint position of the playing end; and the coding end sends the panoramic video frame to the playing end, so that the playing end is indicated to perform decoding playing. By means of the panoramic video coding and decoding methods and devices disclosed by the invention, the code rate of a coded video is greatly reduced; the network bandwidth pressure is reduced; furthermore, because the code rates of various blocks are determined according to the current viewpoint position, human eyes always can have the high-definition video watching effect; and the problem that a panoramic live high-definition video cannot be transmitted in real time can be solved.

The invention discloses a self-adaptive media access control (MAC) protocol for a vehicle-mounted wireless self-organized network, comprising a DR-ALOHA protocol which is used by a control channel and a strategy for accessing a business channel through a node dynamic selection competition method or a pre-reservation method, wherein the DR-ALOHA protocol dynamically adjusts the number of fixed-length time slot in a time division multiplexing principle so that the secure information of all nodes in a network can be transmitted reliably in real time, and is applicable to networks with the node density and the topological structure being dynamically changed; in the strategy of accessing the business channel through the node dynamic selection competition method or the pre-reservation method, firstly the switching threshold of a business channel access method is determined by theoretical analysis and mathematical deduction and then the business channel is accessed through the node dynamic selection competition method or the pre-reservation method by integrating the real-time channel utilization rate of the business channel, so that the channel utilization rate of the business channel can be the highest in any node density.

The disclosed network transmission method for audio / video data comprises: with real-time frame-to-code technology, coding the being-transmitted high code rate data with audio / video frame as unit, compressing and packing to send to the receive end; on the receive end, also with independent audio / video frame as unit, decoding to form audio / video flow for display or storing as file. This invention can transmit any high code rate data in bandwidth-limited network, and displays audio / video content real-time while stores file as requested format.

The invention relates to air quality monitoring equipment based on a sensor network. The prior monitoring equipment and apparatus have various types, thus the data types are not universal. The invention comprises air quality monitoring nodes, a base station and a monitoring center. The monitoring nodes form a network through a self-assembling way, the base station receives air quality parameters acquired by the monitoring nodes, and then processes the data for storage, and the processed data is sent to the remote monitoring center by a GPRS network. Each air quality monitoring node comprises a power management module, an air quality parameter acquisition module, a microprocessor module and a ZigBee radio frequency module. The base station comprises a power management module, a base station microprocessor module, a ZigBee radio frequency module and a GPRS transmission module. The invention is not restricted by geographic environment, thereby being capable of monitoring the air quality change situation in a large-scale region.

The invention discloses a system and a method for determining the environment traffic capacity of an expressway based on vehicle emission. The system comprises a data acquisition system, a processor, a display and a server, wherein the processor is used for analyzing and processing data which are acquired by the data acquisition system; the display and the server are connected with the processor; the processor is in wireless connection and communication with the data acquisition system through a wireless communication system; and the data acquisition system consists of meteorological parameter detection equipment, traffic flow detection equipment and pollutant concentration detection equipment. The method comprises the following steps of: 1, acquisition and real-time uploading of the data; 2, determination of the environment traffic capacity of the expressway: determination of the cumulated amount of various vehicle emission pollutants, determination of a dilution factor f, and determination of the environment traffic capacity of a road section j of the expressway; and 3, synchronous output and storage of a processing result. The invention has the advantages of novel and reasonable design, convenience for implementation, high real-time performance, high determination accuracy of the environment traffic capacity of the expressway, high reliability, high practicability and high popularization and application value.

The invention provides a buoy for blue algae monitoring and blue algae water bloom early warning, which consists of a buoy carrier, an instrument cabin, a monitoring sensor aggregate, a communication antenna and a solar panel, wherein the buoy carrier supports the whole buoy to float on the water surface, the instrument cabin is fixed on the buoy carrier, the monitoring sensor aggregate is suspended right below the buoy carrier, the communication antenna is arranged on the top of the instrument cabin, the solar panel is arranged on the external surface of the instrument cabin, and a power supply, a control module, a signal receiving / transmitting module, a data recorder, a motor and a sensor position adjustor are arranged in the instrument cabin. The invention can be arranged in lakes, reservoirs or water head sites to monitor effective radiation light intensities, temperatures, dissolved oxygen amounts, blue algae amounts and total alga amounts at different positions and depths in the water bodies with the realization of data real-time transmission.

The invention discloses a track traffic train traction brake system and method with integrated traction brake. The system comprises a central control system, a brake executing device and a traction executing system, wherein the brake executing device and the traction executing system are respectively connected to the central control system; the central control system comprises a brake control module which is used for controlling the execution of electropneumatic hybrid brake, and a traction control module which is used for controlling the traction executing device to execute traction or electric braking operation; the central control system receives a traction command and a brake command of trains from a train communications network in real time, and respectively controls the brake executing device and the traction executing device to execute the traction operation or the electropneumatic hybrid brake operation through the brake control module and the traction control module. According to the method, the system is used for executing traction and brake. The track traffic train traction brake system disclosed by the invention has the advantages of being simple in structure, low in required cost, capable of realizing real-time traction and brake control, and high in execution precision and efficiency in the whole electropneumatic hybrid brake process.

The invention relates to a light-emitting diode (LED) large screen display control system and an LED large screen display control method. The method comprises the following steps of: in data source equipment, labeling data flow and transmitting the labeled data flow to remote display equipment; and in the remote display equipment, receiving the data flow with the label, converting the data flow with the label into metadata with the label, broadcasting to M LED display units, acquiring sub-picture data corresponding to the position of the received metadata from the received metadata by the M LED display units on the basis of the position information of the metadata and the label information in the metadata, and displaying, wherein the sub-picture data is a part of the metadata. By using the system and the method, data buffer memory is not required, so that delay is not generated, and real-time high speed transmission and stable synchronous display can be realized. In addition, fault positions can be intelligently fed back, so that the maintenance cost can be reduced.

The invention provides a large passenger aircraft cabin and information system with wireless broadband. The system comprises a cabin core system, a ground communication base station and a ground data center, wherein the ground communication base station is matched with the ground data center. Information of the cabin core system can be wirelessly transmitted to the ground data center, individual needs of passengers are met, updated content of a ground electronic flight bag can be wirelessly uploaded to an on-board electronic flight bag, aircraft state data and maintenance data of an on-board maintenance system can be transmitted to the ground data center, ground maintainers can conveniently monitor the flight state of an aircraft in real time, running safety of the aircraft is guaranteed, the maintenance efficiency of an aircraft maintenance department is improved, and safety, economy and comfort of domestic civil aircrafts are improved.

The invention discloses a wireless passive flexible sensing device for sweat ion detection. Sodium ions, potassium ions, hydrogen ions, calcium ions and hydrogen ions in sweat generate an electrochemical reaction on an ion electrode array, response voltage generated through the reaction is transmitted to an ion signal processing circuit through a connector and then sent into a single-chip microcomputer chip to perform on-chip analog-to-digital conversion after being subjected to signal conditioning, data obtained after conversion is transmitted to an NFC chip and a peripheral circuit thereof;a mobile terminal with an NFC module performs wireless data interaction and energy transfer with an NFC antenna and the NFC chip and the peripheral circuit thereof through inductive coupling among antennas, and voltage conversion data containing ion concentration information is read. The whole system does not need a power supply of a battery, an adopted sensor adopts a printing electronic technology to make an electrode detecting the ion concentration machined on a flexible polydimethylsiloxane substrate, flexibility and bending are achieved, and the device has the good working performance andwide application prospects.

The invention provides an image processing device for image data, which comprises a CCD camera, a programmable gate array, a digital signal processor, a data assembly module and a display module, wherein the programmable gate array is connected with the CCD camera; the input end of the digital signal processor is connected with the output end of the programmable gate array; the data assembly module is connected with a gigabit network sending module of the digital signal processor; and the display module is connected with the data assembly module. Through software setting, the device can acquire the data of CCD cameras with a Camera link interface, different frame frequencies and different resolutions at a high speed in real time, and transmits and displays the acquired data in real time to facilitate field diagnosis and debugging; meanwhile, the device also has the advantages of miniaturization, real-time, high bandwidth and simple upgrade.

The invention discloses a liquid cooling server and a flow measurement method thereof. The liquid cooling server includes a liquid storage device, a liquid circulating pump, a liquid cooling plate anda cooler which are sequentially connected with one another through pipelines, wherein the liquid cooling plate is connected with a heating element, the cooler is connected with an external cold source through a pipeline, the pipelines among the liquid storage device, the liquid circulating pump, the liquid cooling plate and the cooler are filled with cooling liquid, and the liquid cooling plate is further provided with a flow adjusting mechanism which adjusts the flow rate of the cooling liquid flowing into the liquid cooling plate by obtaining the temperature and pressure difference of the cooling liquid flowing into the liquid cooling plate. Compared with the prior art, the liquid cooling server and the flow measurement method thereof are applicable to all liquid cooling servers, and the flow rate of the liquid cooling server can be measured and calculated only by adding three sensor devices for collecting data, so that the competitiveness of the product is greatly enhanced, and theliquid cooling server is high in practicability, wide in application range and easy to popularize.

The invention relates to the technical field of monitoring devices, in particular to intelligent video image processing equipment based on edge calculation. The equipment comprises an image channel processing module, an image coding processing module, a video stream processing server, an edge intelligent processing module and the like. After the data acquisition module acquires original image data, the original data is shunted by the image channel processing module and is transmitted to the video stream processing server and the edge intelligent processing module, and the edge intelligent processing module processes the encoded data according to a corresponding intelligent algorithm. According to the invention, the problem that the existing traditional video image processing equipment haspoor image processing capability is solved; the problem that massive big data cannot be processed in time due to development of a high-definition camera is solved, the effects of reducing uploading ofvideo data, reducing video storage space and efficiently processing and extracting useful video information are achieved, and meanwhile the technical effects of meeting real-time transmission of thevideo data, relieving bandwidth pressure and saving the storage space of a monitoring terminal are achieved.

The invention provides an intelligent electrocardiographic monitoring system. The intelligent electrocardiographic monitoring system comprises an intelligent electrocardiographic remote monitoring terminal, a cloud server and a mobile terminal. The intelligent electrocardiographic remote monitoring terminal collects an electrocardiographic signal of a user and conducting filtering processing and amplifying processing on the electrocardiographic signal, and sends the processed electrocardiographic signal to the cloud server; after receiving the processed electrocardiographic signal, the cloud server analyzes the electrocardiographic signal to calculate a heart rate of the user, and sends alarm information to the intelligent electrocardiographic remote terminal and the mobile terminal which is bound with the user when it is judged that the heart rate of the user is abnormal; the intelligent electrocardiographic remote monitoring terminal sends alarm prompt to the user to inform the user of timely taking processing measures; the mobile terminal is used for receiving electrocardiographic data of the user to monitor an electrocardiographic state of the user in real time, and taking a processing measure timely after receiving alarm information. According to the intelligent electrocardiographic monitoring system, an wireless Internet transmission technology and embedded type system design are integrally applied, and a patient can obtain a dynamic electrocardiographic signal in normal movement conditions with big freedom of movement.

The invention discloses a multi-diameter rock core dual-ring direct tension rock tensile strength tester. The tester comprises three parts such as a loading system, a pressure monitoring and data acquisition system and a loading rack and sample clamping system. The loading system comprises an upper pressure disc, a ball head, a ball seat, a tower-shaped spring, a spherical hinge end cover, an oil cylinder, a lower pressure disc, a guide sleeve and a guide plate. The pressure monitoring and data acquisition system comprises a sensor and data acquisition subsystem, a pressure digital display screen, a monitoring compression gauge and a notebook computer data acquisition subsystem. The loading rack and sample clamping system comprises a diameter-variable rock sample inner ring pressure disc, a diameter-variable rock sample outer ring pressure disc, a lower crossbeam, stand columns, stand column fixed rings and an upper crossbeam. The tester can monitor and record the whole rock sample drawing damage test process, fast determine a tensile strength quantitative value in direct drawing of a rock, has a rigorous and reliable test principle and process and fill a gap in the research field at home.

The present invention discloses a CAN bus electrical control system for automobile windows. The control system comprises a power circuit (1), a CAN (controller area network) bus transceiver (2), a photocoupler (3), a microcontroller (4), a power drive circuit (6), a lifter switch interface circuit (7) and a signal processing circuit (8). The power circuit (1) comprises an accumulator cell and a voltage-stabilizing / isolated power supply. The microcontroller (4) comprises a peripheral interface controller (PIC) and a CAN bus controller. The power drive circuit (6) comprises a current sampling circuit (5). The current sampling circuit (5) is formed by connecting a current (Curr) end of the power drive circuit (6) with the RAO port of the microcontroller (4). The present invention can make wires by which five windows are connected in an automobile reduced to one fifth of the original wires. Meanwhile, the control device has a window anti-pinching function, people can not be pinched and hurt, and the safety properties of the automobile are improved.

The invention relates to the technical field of wireless network high-definition video surveillance and discloses a video surveillance method and apparatus based on 3G network. The apparatus comprises terminal equipment and server-side equipment; the server-side equipment is accessed to Internet through IP network and receives video data stream sent by surveillance video transmission terminal equipment through the 3G network; the terminal equipment comprises a wireless communication module and a video processing module; the wireless communication module is connected with the video processing module through an interface; and the video processing module is connected with a video camera through any one of an IEEE 1394 interface, an SDI (Standard Data Interface) and an HDMI (High-Definition Multimedia Interface) to realize video data collection. According to the invention, mobile high-definition images of video surveillance are transmitted real-timely through binding parallel balance transmission of a plurality of wireless channels under different systems, so that the transmission bandwidth of data is expanded effectively, the data transmission rate of each channel can be adjusted dynamically and real-timely, and the problem of real-time surveillance in a mobile state can be solved.

The invention discloses an expandable three-dimensional display remote video communication method. According to the expandable three-dimensional display remote video communication method, the image of a first user is obtained by means of an RGB-D camera at the data transmission end, the image of the first user comprises a texture image and a depth image, facial feature information and expression feature information are extracted from the texture image, physical feature information is extracted from the depth image, and point clouds of the first user are reconstructed; all the feature information is optimized by means of the point clouds, the optimized feature information is obtained to generate a three-dimensional model A, the three-dimensional model A is projected on a corresponding texture image, the corresponding texture information is extracted, and acquired voice information, the optimized feature information and texture data are sent to a second user; at the data receiving end, the second user receives the data from the first user and extracts the optimized feature information from the received data to generate a three-dimensional model B, the three-dimensional model B is rendered by means of the texture data, and a rendering result is output through a three-dimensional display device, and the voice information is played.

The invention discloses a hybrid MAC protocol method for a cluster-structure multi-carrier acoustic sensor network. The hybrid MAC protocol method comprises the following steps: fusing a scheduling type MAC protocol with a competitive type MAC protocol into a hybrid acoustic communication network MAC protocol, realizing MAC protocol dynamic switching for all nodes in the network by virtue of a global synchronization time, and classifying data with different attributes through a cross layer design thought and then transmitting. Two transmission modes of free burst IBT and active polling IPT are adopted, data messages transmitted in the two different transmission modes are periodic messages and burst messages respectively, IBT time slots and IPT time slots are alternately carried out, and the length of the free burst IBT time slots is dynamically adjustable, so that the needs of transmission for the various messages in the sensor network can be met, the communication energy consumption of the sensor network can be reduced simultaneously when the service quality of the network can be ensured.