144 results about "Zigbee wireless sensor networks" patented technology

In the present invention, a multi-person pose recognition system has been developed. This system includes a body pose detection module, a CC2420DBK board and a multi-person pose monitoring software module. The body pose detection module includes a triaxial accelerometer, a Zigbee chip and an 8-bit microcontroller. Several body pose detection modules and the CC2420DBK board form a Zigbee wireless sensor network (WSN). The CC2420DBK board functions as the receiver of the Zigbee WSN and communicates with a robot onboard computer or a host computer through a RS-232 port. The multi-person pose monitoring software monitors and records activities of multiple users simultaneously. The present invention provides a pose recognition algorithm by combining time-domain analysis and wavelet transform analysis. This algorithm has been implemented in the microcontroller of a body pose estimation module. Through the algorithm, the system can recognize seven body poses: falling, standing, sitting, lying, walking, going upstairs and going downstairs.

The invention discloses an intelligent dwelling environment integrated system based on wireless sensor network, particularly based on ZigBee wireless sensor network. The system comprises an embedded intelligent home server, can realize real-time acquisition of concentration, temperature, humidity and other information of carbon dioxide and controlling of household appliances, thereby greatly lowering the cost, achieving low complexity, low cost and robustness objectives and having very good promotional value.

1. The invention provides an unknown environment exploration-oriented mobile robot self-deploying sensing network, and a system includes a remote control platform, a ZigBee wireless sensor network system and a mobile robot platform. The mobile robot platform carries a ZigBee wireless sensor network node to enter. 2. An unknown environment is explored, in the exploration process, sensor network nodes are continuously deployed according to the need, a wireless sensor network node is put in and joints a network, a radio frequency module of itself is utilized as communication relay to increase control distance of a robot, an environmental sensor module of itself is utilized to monitor environment in real time, thereby expanding a monitoring range, and location information of itself is used as a positioning anchor point to assist robot positioning. The unknown environment exploration-oriented mobile robot self-deploying sensing network in the invention can well realize rapid exploration and relatively precise positioning of an unknown environment by the robot, and can be well applied to the field of exploration of unknown environments of disaster relief, environment survey and the like.

The invention discloses a wireless remote PLC (Programmable Logic Controller) monitoring system comprising a host server, remote monitoring client sides, a ZigBee coordinator node, ZigBee router nodes, PLC control nodes and PLCs. The PLC control nodes are in connection and communication with the PLCs, and the host server is in communication with the remote monitoring client sides and the ZigBee coordinator node; control information of the remote monitoring client sides is transmitted to the PLC control nodes by virtue of the ZigBee coordinator node, and the remote monitoring client sides are used for receiving operation state information of the PLCs and workshop equipment, which is transmitted by virtue of the PLC control nodes; and the ZigBee coordinator node is used for controlling ZigBee wireless sensor networks, the PLC control nodes are in connection and communication with the ZigBee router nodes, and the control information or the operation state information is transmitted between the PLC control nodes and the ZigBee coordinator node by virtue of the ZigBee router nodes. The invention also discloses a method for acquiring the PLC operation information and controlling the PLCs by virtue of the monitoring system. The wireless remote PLC monitoring system can be used for flexibly controlling the PLCs and timely acquiring the control and operation state information of the PLCs and controlled targets on the basis of a wireless sensor network technology, and is simple to operate and easy to maintain and expand.

The invention discloses a system and method for wireless monitoring of the deformation of a shield tunnel. According to the system and method for wireless monitoring of the deformation of the shield tunnel, monitoring of the deformation of the shield tunnel and early warning are achieved based on measurement of pipe piece inclination. The system for wireless monitoring of the deformation of the shield tunnel comprises a Zigbee wireless sensor network, a GPRS data transmission terminal and a data processing application center, wherein the Zigbee wireless sensor network comprises multiple inclination sensing nodes which are in data communication with one another in a wireless mode, a plurality of routing nodes and a center node, monitoring data, about the variation of inclinations of adjacent blocks, collected by the Zigbee wireless sensor network are sent to the data processing application center through the GPRS data transmission terminal, the monitoring data are processed, stored and analyzed through the data processing application center, monitoring and early warning are achieved according to an analysis result and a preset threshold value, and information is fed back to management staff. According to the system and method for wireless monitoring of the deformation of the shield tunnel, a reasonable early warning threshold value is determined scientifically, the installation positions of the inclination sensing nodes are optimized, the system and device have the advantages that construction is convenient, cost is low, energy consumption is low, the monitoring precision is high and operation is stable and reliable, and the system and device are particularly suitable for wide-range long-term real-time monitoring and early warning of deformation of long shield tunnels.

A parking space detecting system based on a magnetoresistive sensor and the ZigBee is characterized by comprising a ZigBee wireless sensor network unit and an upper computer unit, and the ZigBee wireless sensor network unit is composed of a router, a coordinator and a parking space detector serving as a terminal node. The working method of the system comprises the steps of arousing a node and starting detection, establishing a ZigBee wireless sensor network, detecting the information of a parking space, detecting the state of the parking space and displaying the occupied information of the parking space. The system has the advantages that construction is convenient, cost is low, parking space information is accurate and complete, detecting effect is good, and expandability is high.

The invention discloses beam pumping unit remote monitoring method and system based on a wireless sensor network and a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access). The system comprises three parts of a wireless sensor network of a local scope, a TD-SCDMA public network and a beam pumping unit remote monitoring center. The wireless sensor network comprises a plurality of sensor nodes and a unique coordinator node which is also used as a ZifBee/TD-SCDMA gateway; important beam pumping unit working condition parameters are uploaded to the beam pumping unit remote monitoring center through the TD-SCDMA gateway on line in real time; general working condition parameters are temporarily stored on the coordinator node, acquired by an inspector with wireless USB acquirer in hand in fixed time and off-line aggregated to the beam pumping unit remote monitoring center; and a beam pumping unit indicator diagram (rod load and displacement relationship diagram) is obtained by adopting a cooperative work mode of indirect and direct measurement, which improves the reliability of the monitoring system. The ZigBee wireless sensor network replaces traditional complicated sensor node wiring communication, which improves the reliability of a field detection system; and moreover, the sensor node adopts an intermittent working mode with timing awakening, which saves the electric energy.

The invention discloses an embedded electrocardiograph (ECG) pulse signal monitoring early warning system which integrates the existing wireless ECG Holter monitor with a wearable pulse sensor by the ZigBee wireless sensor network technology. The embedded ECG pulse signal monitoring early warning system is built and comprises a physiological signal acquisition module and a physiological signal subsequent treatment module. The obtained synchronous electrocardiograph signal and pulse data are performed with fusion analysis and treatment to eliminate ambient interference and obtain a credible analysis and diagnosis result. DSP large data throughput and quick arithmetic capability are utilized to transmit physiological signals, such as ECG, pulse wave and the like to a DSP processor; the analysis method of data mining and information fusion is adopted, an intelligent diagnosis result built by a clinical database is taken as the reference to obtain personal medical care proposal; a communication controller and a GSM transceiver module are carried to transmit important medical data to a medical monitoring station which can quickly apply relevant rescue measures.

The invention relates to the field of offshore wind power, relates to a remote offshore wind power monitoring device based on ZigBee and GPRS techniques and in particular relates to a remote offshore wind power monitoring communicating system. Sensors are arranged on blades, a transmitting system, a cabin and a tower frame of an offshore wind turbine to collect operation parameters and state parameters of the offshore wind turbine; data of the sensors are gathered through a ZigBee wireless sensor network, and the data are transmitted to a remote monitoring platform through a GPRS network; the monitoring platform can analyze and further process the data to obtain parameters which can show the rotating speed, the vibration, the temperature, the voltage and the current of the offshore wind turbine in real time; and the monitored parameters are stored in a database, the vibration signals of the offshore wind turbine are analyzed to early find fault of the offshore wind turbine. Thus, convenience is brought to maintainers to process the fault in time, serious accidents are avoided, and the operating and maintaining cost of the offshore wind turbine is reduced.

The method comprises: receiving the data packet from Ethernet; comparing the length of the Ethernet data packet with a predetermined value; if it is more than the predetermined value, then ending the conversion process; if not, then continuing the process; getting the address of radio sensor network corresponding to the destination address of the Ethernet data packet to construct the data packet of the radio sensor network; ending the conversion process. The invention also reveals an apparatus thereof. The invention can be used in the data transmission between IPV5 Ethernet network and the ZIGBEE radio sensor network.

The invention discloses an intelligent household system based on ZigBee. The intelligent household system comprises household equipment nodes, a household main node, a household gateway and an intelligent mobile client. ZigBee modules are arranged in a household environment to serve as the household equipment nodes which are combined in a wireless communication mode to form a network. The household equipment nodes are responsible for monitoring the environment state in a certain scope around the household equipment nodes, sending and receiving signals and carrying out data processing. A ZigBee wireless sensor network serves as a household control subnet, a household PC machine serves as the household gateway and a household control center, and the household PC machine accesses the household control subnet on an Android through a WIFI wireless data communication technology, so that intelligent control and remote monitoring over household system equipment is realized. The intelligent household system based on ZigBee is simple and highly efficient, low in cost, high in universality and good in expansibility.

The invention discloses a ZigBee wireless sensor network-based node positioning method. The method comprises the following steps: A1, a to-be-tested node broadcasts positioning beacon signals to the whole ZigBee wireless sensor network periodically in accordance with a specified power; A2, power of each positioning beacon signal is respectively calculated after each beach node receives the positioning beacon signals, and the calculated power and the corresponding network ID of the beach nodes are packaged into a positioning data packet which is send to the to-be-tested node; A3, the positioning data packet which is received by the to-be-tested node is integrated and then is sent to a gateway node; A4, the gateway node transmits and processes the received positioning data packet to a PC, and the PC calculates the distance between the to-be-tested node and each beach node according to power values in the positioning data packet; and A5, the PC calculates position coordinates of the to-be-tested node according to the calculated distance between the to-be-tested node and each beach node.

The invention discloses a Zigbee wireless sensor network of master and slave tree types, a construction method and a routing protocol. The method comprises the following steps of: dividing a whole network into a master network and a plurality of salve networks; forming the master network by using a master coordinator and related nodes; and constructing the plurality of salve networks by using peripheral isolated nodes and a plurality of routers in the master network serving as slave coordinators so as to construct the network with a master and slave tree type structure. The traditional tree type routing protocol is improved so that the routing protocol can be applied to the network of the master and slave tree types. The method has the advantages of enlarging the scale of the traditional tree type network, facilitating elimination of the isolated node number in the network, facilitating reduction of overhead of energy and memory of the routers caused by constructing a routing table and improving the survival time of the network by adopting the improved tree type routing protocol, and ensuring the compatibility with the primary protocol without any modification on the frame structure of the primary Zigbee protocol.

The invention relates to a greenhouse environmental monitoring system based on a wireless sensor network and GPRS (general packet radio service). The greenhouse environmental monitoring system comprises a sensor, a Zigbee wireless sensor network, a field controller, a GPRS network, a remote control host and an environmental control execution mechanism, wherein the sensor, the Zigbee wireless sensor network, the field controller, and the environmental control execution mechanism are arranged in a greenhouse; the sensor is connected with the field controller through the Zigbee wireless sensor network or a wired manner; and the field controller is connected with the environmental control execution mechanism, and is connected with the remote control host through the GPRS network. Compared with the prior art, with the adoption of the greenhouse environmental monitoring system, the problems that wire arrangement is cockamamie and the cost is higher in the traditional system are overcome, the stability of the information transmission is good, and a control manner is flexible and convenient.

The invention relates to a vehicle wireless sensor system and a detection method thereof, in particular to vehicle status detecting system and a detection method thereof based on the ZigBee wireless sensor network and the GPRS wireless data transmission network. The vehicle wireless sensor system comprises a transmission unit and a reception unit. The transmission unit comprises a wireless humidity sensor and a wireless door-closing/opening sensor. The wireless humidity sensor is arranged at an air returning opening of an air conditioner in the carriage. The wireless door-closing/opening sensor is arranged in the carriage and triggered by a door magnetic signal. The reception unit adopts a wireless data collector arranged on the vehicle body. The detection method of the vehicle wireless sensor system comprises the following steps: 1) after the reception unit is electrified, the transmission unit is triggered and then transmits a radio frequency signal, and the reception unit receives and verifies the radio frequency signal; 2) the reception unit analyzes the received data; and after the reception of correct data frames from a transmitter and the processing of step 2), the reception unit transmits the data through RS232 level to a GPS vehicle terminal.

The invention relates to the field of power equipment safety monitoring, in particular to a high-voltage equipment temperature monitoring system based on the ZigBee wireless sensor network technology. The high-voltage equipment temperature monitoring system comprises a monitoring center, RS 485 buses, at least one RS 485 gateway and a plurality of ZigBee terminal nodes corresponding to the RS 485 gateways respectively. Each RS 485 gateway comprises a ZigBee coordinator and an RS 485 forwarding module. The ZigBee terminal nodes are in the dormant state at ordinary times, temperature sensors in the ZigBee terminal nodes trigger interruption when the temperature of monitoring points is higher than a preset value, the interruption awakens the ZigBee terminal nodes so that the ZigBee terminal nodes can upload high temperature alarm information to the monitoring center in time, and therefore the problem that when ZigBee terminal nodes are in the dormant state, a monitoring system can not deal with sudden temperature rise of monitoring points or acquire high temperature alarm information in time is solved. The high-voltage equipment temperature monitoring system has the advantages of being low in cost and power consumption, high in real-time performance and reliability and good in usability.

The invention discloses a method of ZigBee network based vehicle positioning in indoor parking area environment. According to the method, a ZigBee wireless sensor network is established in an indoor parking area, the network is divided in a time division and zoning manner to calculate the distance between a to-be-positioned vehicle and a positioning terminal node, distance calculation precision is improved, further vehicle positioning precision is improved, and quick and accurate guide to the vehicles in the indoor parking area environment is realized beneficially.

The invention is suitable for the field of intelligent monitoring, and provides an energy source monitoring method, device and system based on a ZigBee wireless sensor network. The energy source monitoring method comprises the following steps: sending a data acquiring request to each energy source monitoring device in the ZigBee wireless sensor network through a ZigBee coordinator by a monitoring center; receiving data returned by each energy source monitoring device in the ZigBee wireless sensor network by the ZigBee coordinator, wherein the data is obtained by a sensor in each energy source monitoring device; recording the received data returned by each energy source monitoring device in the ZigBee wireless sensor network; counting the returned data according to an energy source consumption type and time to obtain use conditions of various energy sources. According to the energy source monitoring method, device and system, the data in various energy source monitoring devices can be accurately obtained in real time, the data obtained from the energy source monitoring devices can be analyzed through the monitoring center, so that the use conditions of various energy sources can be obtained, and the purposes of prewarning of a warning line and energy use planning in an energy source using process are achieved.

The invention relates to a detection method for rapidly positioning local discharge of a GIS (geographic information system) by using an ultrasonic testing technology. The detection method comprises the following steps: (1) respectively providing an ultrasonic probe in each air chamber in an interval of a power GIS; (2) carrying out synchronous data collection on each ultrasonic probe; (3) analyzing and comparing the data collected by each ultrasonic probe; (4) gradually detecting each air chamber in other intervals of the power GIS according to the order from the step (1) to the step (3). By adopting the detection method, local discharge of the GIS is subjected to ultrasonic local discharge detection by a multi-channel GIS using a zigBee wireless sensor network transmission technology and a GPS (global position system) synchronous collecting technology; the ultrasonic probes are respectively arranged inside each independent air chamber; a collecting command is transmitted by a host computer of a control display part; each probe synchronously collects the data through the GPS, so that the test efficiency of ultrasonic detection on local discharge inside the GIS is improved; the functions of rapidly detecting and positioning local discharge inside the GIS are achieved; the detection time is shortened; the problem that a plurality of interval equipments are detected within limited time in a commissioning test of the GIS is overcome.

The invention discloses a zigbee wireless sensor network based system and method for monitoring the microenvironment of a cabinet. The system comprises power distribution units for the cabinet with data nodes, convergent nodes and a wireless sensor network management platform. The power distribution units are used for adopting wireless sensors arranged in the power distribution units to collect such information as supply voltage, supply current, temperature and humidity in the microenvironment of the cabinet while distributing power for the cabinet, and are used for transmitting the collected data to the convergent nodes via wireless signals. The convergent nodes are connected with a plurality of power distribution units in a wireless manner, are used for taking charge of organizing, establishing, maintaining and controlling the wireless sensor networks formed by the power distribution units and are used for receiving the collected data. The convergent nodes are also connected with the wireless sensor network management platform via the Ethernet and transmit the received collected data to the wireless sensor network management platform via the Ethernet. The wireless sensor network management platform is used for receiving the collected data transmitted by the convergent nodes, analyzing the collected data and managing the wireless sensor network.

The invention discloses an intelligent transformer substation state monitoring data collection system based on a multilayer hybrid network, wherein the system belongs to the technical field of intelligent transformer substations. The intelligent transformer substation state monitoring data collection system comprises the components of a power equipment state monitoring data acquisition IED group based on a distributed ZigBee wireless sensor network, an upper convergence IED group and a deployment state monitoring server. The system is divided into a station controlling layer and an acquisition convergence layer. The state monitoring server is deployed in the station controlling layer of the intelligent transformer substation. The acquisition convergence layer comprises a convergence subsystem and an acquisition subsystem. A coordination concentrator of the convergence subsystem is connected with the state monitoring server. The intelligent transformer substation state monitoring data collection system remarkably settles defects of dependent for artificial intervention, discrete management, low efficiency and difficult data fusion in an existing transformer substation state monitoring field. Furthermore consistency, effectiveness and wholeness of state monitoring data are maximally improved. System data are monitored and evaluated in a larger-span macroscopic manner. Furthermore the intelligent transformer substation state monitoring data collection system supplies frontend support for state maintenance decision making and safety risk evaluation of the power equipment.

The invention relates to an indoor air quality test terminal, comprising a tank body, a fan air inlet/outlet, an LED (light-emitting diode) indicator light and a display screen, wherein a core board of the indoor air quality test terminal comprises a controller module and a radio frequency communication module; a sensor module comprises a temperature sensor, a humidity sensor, a carbon oxide sensor, a carbon dioxide sensor and an air quality sensor; an LCD (liquid crystal display) display module is used for displaying measurement parameters in real time; a power module supplies power to all the modules; a fan module is used for ventilation inside and outside the casing; an LED indicator light circuit prompts the working condition of the terminal in red, green or red-green; and a digital extended interface comprises an A/D (alternating/direct) conversion interface and an unappropriated I/O (input/output) port. The invention has the positive effects that: single composition detection ischanged into multiple composition detections, the requirement of HSE (health safety and environment) management of petrifaction enterprises can be met, the detected data can be displayed by a displayscreen or can be transmitted to a control room to be subjected to centralized monitoring by virtue of a ZigBee wireless sensor network, and the requirements of low cost and large-scale layout can be met, thus the terminal is applicable to popularization.

The invention discloses a device for detecting energy consumption and faults of a Zigbee wireless sensor network node, and is used for solving the technical problems that the wireless sensor network node is not beneficial to saving the energy of a whole network and prolonging the service life of the whole network because the wireless sensor network node can not detect self energy consumption and faults. The device mainly comprises a sensor socket, a signal amplification module, a working state indication module, a high-frequency transmission module, an energy consumption and fault detection module, a cell/power supply module and a serial port output module. The detection on the energy consumption and faults of the wireless sensor network node is realized by the energy consumption and fault detection module consisting of an MSP430 singlechip through control connection of the sensor socket and the sensor network node. The device for detecting the energy consumption and faults of the Zigbee wireless sensor network node, disclosed by the invention, has the characteristics and the beneficial effects of: simultaneously detecting node energy consumption and node fault information while the wireless sensor network node detects illumination intensity or humidity and temperature and networks based on a Zigbee technology, avoiding energy waste caused by sending information to faulty nodes, and prolonging the service life of the whole network. The wireless sensor network node is additionally provided with a light emitting diode, thus the working state of the sensor node is indicated by lightening or extinguishing the light emitting diode.

The invention discloses an outdoor wireless monitoring system of a patient in a hospital, consisting of three parts, namely a ZigBee wireless sensor network, a dual-mode wireless transmission system and an upper computer, wherein the ZigBee wireless sensor network comprises a coordinator node, a reference node and a patient positioning and physical parameter collecting node; the dual-mode wirelesstransmission system can carry out Ethernet transmission and GPRS network transmission; the software of the upper computer is divided into a head nurse station, a resident enrolled nurse station and anurse duty station. The system collects the physical parameters of electrocardio, blood oxygen, blood pressure, pulse rate, body temperature and the like and outdoor position data of the patient in real time; a true-code and reverse-code calibration method is adopted when in wireless transmission; a fusion method of Manhattan difference value positioning and Location Engine positioning is adoptedwhen in positioning; and the system has the functions of emergency alarm of patients, under-current alarm of batteries, threshold alarm of physical parameters and the like and ensures that the patients in outdoor activities obtain real-time and effective monitoring.