CN203219503U - Wireless sensor network system - Google Patents
Wireless sensor network system Download PDFInfo
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- CN203219503U CN203219503U CN 201320188703 CN201320188703U CN203219503U CN 203219503 U CN203219503 U CN 203219503U CN 201320188703 CN201320188703 CN 201320188703 CN 201320188703 U CN201320188703 U CN 201320188703U CN 203219503 U CN203219503 U CN 203219503U
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Abstract
The utility model relates to a wireless sensor network system which can expand network capacity, reduce system cost and raise data transmission efficiency. The wireless sensor network system comprises a Zigbee tree network subsystem and a plurality of star network subsystems. The Zigbee tree network subsystem comprises a coordinator, a plurality of routers and a plurality of terminal nodes. Each star network subsystem comprises a main node and a plurality of sensor nodes. The main nodes of the star network subsystems are in communication connection with the terminal nodes of the Zigbee tree network subsystem. The sensor nodes are in communication connection with the main nodes through wireless links. The sensor nodes are used to collect sensing data and send the sensing data to the main nodes. The routers are connected with the terminal nodes through wireless links. The coordinator is connected with the routers through the wireless links.
Description
Technical field
The utility model relates to a kind of wireless sensor network system.
Background technology
Along with the develop rapidly of the communication technology, embedded computing technique, distributed information processing and sensor technology and constantly fusion, a kind of new network that has perception, computing capability and communication capacity concurrently---wireless sensor network is progressively developed, exploitation is simple, cheap, survivability is strong, disguised high advantage because it has, and is with a wide range of applications in fields such as environmental monitoring, reading intelligent agriculture, Smart Home, medical monitorings.
For satisfying the Wireless Networking requirement of small low-cost equipment, in December, 2000, IEEE set up IEEE802.15.4 working group, be devoted to define a kind ofly be suitable for fixing, low rate wireless connect technology---the ZigBee technology of portable or utmost point low complex degree, cost and power consumption that mobile device uses.ZigBee one word derives from honeybee when finding the pollen position, transmits the azimuth information at pollen place by jumping the dancing of ZigZag shape, namely relies on this mode to constitute the communication network in the colony.Be characterized in closely, low complex degree, low-power consumption, low data rate, low cost.Mainly be suitable for control and remote control field automatically, can embed various device.
The Zigbee wireless network mainly comprises three types node, be telegon, router and terminal node, wherein telegon and router are full-function device FFD(Full Function Device), all functions and the characteristic of support standard definition can communicate with any node; And terminal node is to simplify function device RFD(Reduced Function Device), the RFD functions of the equipments are succinct, storage capacity requirement is minimum, RFD equipment can only with a FFD devices communicating, can not direct communication between the RFD equipment.
Zigbee network support star, tree-like and netted three kinds of network topology structures.The routing mode of tree topology is very simple, each message is transmitted and is all carried out between father, child node, namely when source node need communicate with destination node, at first message is forwarded to its father node or child node, the node of receiving this message also is transmitted to message corresponding father node or child node in the same way, is transferred into objective sensor node until this message.Though this routing mode is simple, total node number that traditional Zigbee tree network can be supported is limited, and along with the increase of number of terminal nodes purpose, the cost of system is obviously increase also, and to the maintenance of network node with very big test.Simultaneously because tree-like route, when the terminal node number more for a long time, it is on the low side that network coordinator wants to obtain the sensing data efficient of each terminal node.
The star point-to-point configuration, by a major node with a plurality ofly form from node, host node and microcontroller is arranged from node, host node can be initiatively to the sensing data that collects from the node poll, also can regularly data initiatively be uploaded to host node from node, working method is very flexible.This starshaped net topology is very simple, the overhead that need not to produce for maintaining network, and it is very low to adopt corresponding park mode power consumption can be dropped to when not working, and point-to-point communication is minimum a kind of of cost in all communications.But its communication distance is limited, and network configuration is single, and the transfer of data robustness is low, is not suitable for complicated large-scale relatively application scenario, and certain limitation is arranged.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of can the extended network network capacity, reduce system cost, improve the wireless sensor network system of data transmission efficiency.
The purpose of this utility model is achieved in that
A kind of wireless sensor network system, comprise a Zigbee tree network subsystem and some star network subsystems, described Zigbee tree network system comprises a telegon, several routers and several terminal nodes, described star network subsystem comprises a host node and some sensor nodes, and the terminal node of the host node of described star network subsystem and described Zigbee tree network subsystem communicates to connect; Described sensor node and host node communicate to connect by Radio Link, sensor node is used for collecting sensing data and being sent to host node, described router is connected by Radio Link with each terminal node, and described telegon is connected by Radio Link with each router.
Wherein, each node of described Zigbee tree network subsystem is formed by Node Controller, RF front-end module and radio frequency power amplification modules, and each node of described Zigbee tree network subsystem refers to telegon, router and terminal node; Each node of described star network subsystem is formed by Node Controller and point-to-point radio receiving transmitting module, and each node of described star network subsystem refers to host node and sensor node; The terminal node of the host node of described star network subsystem and tree network subsystem is directly direct-connected by serial ports, the host node of star network subsystem will gather from the sensing data that sensor node is collected, and information directly is forwarded to the terminal node of tree network subsystem through serial ports.
As a kind of preferred disposition of the present utility model, described Node Controller is the LPC2136 Node Controller; Described RF front-end module is the CC2520 RF front-end module; Described radio frequency power amplification modules is the CC2591 radio frequency power amplification modules; Described Node Controller is the STM32F103 Node Controller; Described point-to-point radio receiving transmitting module is the point-to-point radio receiving transmitting module of nRF24L01.Above-mentioned preferred disposition makes between the terminal node of Zigbee tree network subsystem line communication apart from reaching more than 300 meters, and has mechanism such as encryption, data re-transmission, the robustness and the fail safe that have improved transfer of data; And the nRF24L01 radio receiving transmitting module supports at most that a bit to 6 communication, the line communication distance reaches 100 meters, and it is low that this module has a cost, uses functions such as simple.
The utility model is owing to adopted technique scheme, compared with prior art have following beneficial effect: the utility model combines the star network subsystem of point-to-point wireless receiving and dispatching with traditional Zigbee tree network subsystem, constitute the hybrid wireless sensor network system, the advantage of two kinds of network systems of set, realize the remote of data by Zigbee tree network subsystem, the transmission of high reliability, realize the collection of local heat transfer agent by the star network subsystem simultaneously and gather, because the cost of point-to-point communication is minimum a kind of in all radio communications, therefore under the equivalent network capacity, (namely has identical sensor node number), the cost of the utility model hybrid network is lower than the cost of traditional Zigbee tree network, avoid the secondary development of the Zigbee protocol stack network layer of sensor node simultaneously, shortened the construction cycle greatly; In addition, because the star network subsystem can gather the information of a plurality of sensor nodes, send to together in the Zigbee tree network, compare each traditional terminal node and only have a sensor node Zigbee tree network, the efficient of transmission obviously improves.
Description of drawings
By following embodiments of the invention and description taken together with the accompanying drawings, other advantage of the present invention and feature are shown, this embodiment provides with the form of example, but is not limited to this, wherein:
Fig. 1 is the structural representation of the utility model wireless sensor network system;
Fig. 2 is that the structure of each node of Zigbee tree network subsystem is formed schematic diagram;
Fig. 3 is that the structure of each node of star network subsystem is formed schematic diagram;
Fig. 4 is the connection diagram of Zigbee tree network subsystem and star network subsystem.
Embodiment
As shown in Figure 1, be a preferred embodiment of the utility model wireless sensor network system, whole system is made up of Zigbee tree network subsystem 1 and star network subsystem 2.Wherein, tree network subsystem 1 is by a telegon 11, and some router ones 2 and some terminal nodes 13 are formed; Star network subsystem 2 is made up of a host node 21 and Dorr sensor node 22.Wherein, it is the same that the hardware of each telegon 11, router one 2, terminal node 13 is formed, just different on the function of software, telegon 11 and router one 2 all have routing function, allow other node to add network, need more relatively resource to come storage networking routing table and information such as neighbor table, network state; Telegon 11 also has the function of setting up Zigbee Wireless Personal Network and initialization network except possessing routing function; And terminal node 13 does not possess routing function, can only join in certain router or the telegon.
It is the same (in conjunction with shown in Figure 2) that each node of Zigbee tree network subsystem is formed at hardware, and namely telegon 11, router one 2 and terminal node 13 all are made up of Node Controller, RF front-end module and radio frequency power amplification modules.Moving the Zigbee protocol stack based on embedded real-time operating system uC/OSII on the Node Controller, protocol stack sofeware has been specified the role of each node in Zigbee tree network subsystem, namely is telegon, router or terminal node.Telegon is at first set up and Zigbee network of initialization, and router and terminal node add in succession subsequently, form Zigbee tree network subsystem jointly.In the present embodiment, the chip LPC2136 of NXP company is adopted in the master control of Node Controller, and this chip is based on a microcontroller of supporting 16/32 ARM7TDMI-STM CPU of real-time simulation and tracking, and has the high speed Flash memory that the 256K byte embeds; This chip has 4 32 bit timing devices, 2 10 8 road ADC, 1 10 DAC, 6 PWM passages and reaches 47 GPIO and reach 9 external interrupt that the edge level sets out, and is specially adapted to Industry Control and medical system.RF front-end module is made up of radio transmitting and receiving chip CC2520 and corresponding peripheral circuit based on the compatible IEEE802.15.4/Zigbee agreement of Texas Instrument, communicates by spi bus with Node Controller, finishes actual transmission and the receiving course of data.Radio frequency power amplification modules is formed based on radio-frequency (RF) power amplification chip CC2591 and the corresponding peripheral circuit produced by Texas Instruments equally.CC2591 increases power output by power amplification is provided, add reception sensitivity by providing LNA to heighten, well expand efficient and the distance of wireless receiving and dispatching, made the communication distance of tree network subsystem node can reach more than 300 meters on the open ground.
In conjunction with shown in Figure 3, the star network subsystem is made up of a host node 21 and some sensor nodes 22, and host node 21 is the same with sensor node 22 at hardware, forms by Node Controller and point-to-point radio receiving transmitting module.In the present embodiment, the STM32F103 chip of ST company of STMicw Electronics is adopted in the master control of Node Controller, this chip adopts the RISC kernel of high performance ARM Cortex-M332 position, operating frequency is 72MHz, built-in up to the flash memory of 128K byte and the SRAM of 20K byte, comprise 2 12 ADC, 3 general 16 bit timing devices and 1 PWM timer, also comprise 2 I2C interfaces and SPI interface, 3 UART interfaces, a USB interface and a CAN interface.Point-to-point transceiver module is based on point-to-point transceiving chip nRF24L01 and compositions such as peripheral circuit and antenna; NRF24L01 is that a 2.4GHz of being operated in is to the monolithic wireless transceiver chip of 2.5GHz Global Access with ISM band, comprise frequency generator, enhancement mode controller, power amplifier, crystal oscillator, modulator and demodulator, arranging of power output, channel selection and agreement can arrange by the SPI interface.This chip has lower current drain, and communication distance can reach 100 meters.
NRF24L01 can be set to sending mode and receiving mode under mode of operation, under receiving mode, can receive the data of 6 tunnel different passages, each data channel is used obstructed address, but share identical channel, namely 6 different nRF24L01 are set to can carry out communication with the same nRF24L01 that is set to receiving mode behind the sending mode, and the nRF24L01 that is set to receiving mode can identify these 6 transmitting terminals.Therefore, the point-to-point radio receiving transmitting module of nRF24L01 supports at most at 1 o'clock to 6 o'clock communication, host node passes through the mode of poll successively to sending request of data from node, after receiving data request information from node, the sensing data that collects is sent to host node, realize the collection of sensing data in the certain limit and gather.
As shown in Figure 4, direct-connected by serial ports between the Node Controller of the Node Controller of the terminal node 13 of Zigbee tree network subsystem and the host node 21 of star network subsystem, finish the information interaction between star network subsystem and the Zigbee tree network subsystem.The host node 21 of star network subsystem is asked image data by polling mode to each sensor node 22, sensor node 22 is sent to corresponding host node 21 with the data that collect, host node 21 gathers the data of all 6 sensor nodes 22, and be sent to the terminal node 13 of Zigbee tree network subsystem by serial ports, after the terminal node 13 of Zigbee tree network subsystem is received the data that the star network subsystem sends, via router one 2, data are sent to the telegon 11 of far-end, realize that finally the long-range of sensing data obtains.
The terminal node place of Zigbee tree network subsystem expands by the star network subsystem, effectively raise the coverage of whole wireless network, and, because the terminal node of Zigbee tree network subsystem can obtain the data of 6 sensing nodes that the host node of star network subsystem sends simultaneously, compare the tree-like sensor network of traditional Z igbee that each terminal node only links to each other with 1 sensing node, the efficient that data are obtained obviously promotes; Simultaneously, in view of the price of point-to-point wireless transceiver more much lower than Zigbee node, and the software development of point-to-point wireless transceiver is compared the exploitation of Zigbee protocol stack and is safeguarded much simple, therefore no matter on price still is the development time, present embodiment is compared traditional Z igbee wireless network and is had remarkable advantages, and range of application is more extensive.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and distortion, these improvement and distortion also should be considered as protection range of the present utility model.
Claims (6)
1. wireless sensor network system, it is characterized in that: comprise a Zigbee tree network subsystem and some star network subsystems, described Zigbee tree network system comprises a telegon, several routers and several terminal nodes, described star network subsystem comprises a host node and some sensor nodes, and the terminal node of the host node of described star network subsystem and described Zigbee tree network subsystem communicates to connect;
Described sensor node and host node communicate to connect by Radio Link, sensor node is used for collecting sensing data and being sent to host node, described router is connected by Radio Link with each terminal node, and described telegon is connected by Radio Link with each router.
2. wireless sensor network system as claimed in claim 1, it is characterized in that: each node of described Zigbee tree network subsystem is formed by Node Controller, RF front-end module and radio frequency power amplification modules, and each node of described Zigbee tree network subsystem refers to telegon, router and terminal node.
3. wireless sensor network system as claimed in claim 2, it is characterized in that: described Node Controller is the LPC2136 Node Controller; Described RF front-end module is the CC2520 RF front-end module; Described radio frequency power amplification modules is the CC2591 radio frequency power amplification modules.
4. wireless sensor network system as claimed in claim 1, it is characterized in that: each node of described star network subsystem is formed by Node Controller and point-to-point radio receiving transmitting module, and each node of described star network subsystem refers to host node and sensor node.
5. wireless sensor network system as claimed in claim 4, it is characterized in that: described Node Controller is the STM32F103 Node Controller; Described point-to-point radio receiving transmitting module is the point-to-point radio receiving transmitting module of nRF24L01.
6. wireless sensor network system as claimed in claim 1, it is characterized in that: the terminal node of the host node of described star network subsystem and tree network subsystem is directly direct-connected by serial ports, the host node of star network subsystem will gather from the sensing data that sensor node is collected, and information directly is forwarded to the terminal node of tree network subsystem through serial ports.
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| CN 201320188703 CN203219503U (en) | 2013-04-15 | 2013-04-15 | Wireless sensor network system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700596A (en) * | 2015-03-25 | 2015-06-10 | 哈尔滨中超信诺科技有限公司 | Wireless temperature collection system |
| CN105204788A (en) * | 2015-10-28 | 2015-12-30 | 成都鼎智汇科技有限公司 | Data processing method based on Internet of Things |
| CN106205098A (en) * | 2016-08-30 | 2016-12-07 | 广东柯内特环境科技有限公司 | Environment Internet of Things data acquisition transmission terminal |
| CN107025200A (en) * | 2016-01-29 | 2017-08-08 | 美国亚德诺半导体公司 | GPIO to GPIO communications on multinode linked network |
| CN108205879A (en) * | 2016-12-20 | 2018-06-26 | 天津市军联科技有限公司 | Photovoltaic array management system for monitoring based on wireless sensor network |
| CN110191454A (en) * | 2019-07-12 | 2019-08-30 | 四川长虹电器股份有限公司 | A method of the dilatation of access device quantity is realized at Zigbee coordinator end |
| CN110350925A (en) * | 2018-11-29 | 2019-10-18 | 西安电子科技大学 | Wireless transmitting system and its method based on frequency agility |
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2013
- 2013-04-15 CN CN 201320188703 patent/CN203219503U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700596A (en) * | 2015-03-25 | 2015-06-10 | 哈尔滨中超信诺科技有限公司 | Wireless temperature collection system |
| CN104700596B (en) * | 2015-03-25 | 2018-01-16 | 哈尔滨中超信诺科技有限公司 | wireless temperature acquisition system |
| CN105204788A (en) * | 2015-10-28 | 2015-12-30 | 成都鼎智汇科技有限公司 | Data processing method based on Internet of Things |
| CN105204788B (en) * | 2015-10-28 | 2018-03-30 | 内蒙古青电云电力服务有限公司 | A kind of data processing method based on Internet of Things |
| CN107025200A (en) * | 2016-01-29 | 2017-08-08 | 美国亚德诺半导体公司 | GPIO to GPIO communications on multinode linked network |
| US10872049B2 (en) | 2016-01-29 | 2020-12-22 | Analog Devices, Inc. | GPIO-to-GPIO communication on a multi-node daisy-chained network |
| CN107025200B (en) * | 2016-01-29 | 2021-03-12 | 美国亚德诺半导体公司 | GPIO to GPIO communication over multi-node link networks |
| CN106205098A (en) * | 2016-08-30 | 2016-12-07 | 广东柯内特环境科技有限公司 | Environment Internet of Things data acquisition transmission terminal |
| CN108205879A (en) * | 2016-12-20 | 2018-06-26 | 天津市军联科技有限公司 | Photovoltaic array management system for monitoring based on wireless sensor network |
| CN110350925A (en) * | 2018-11-29 | 2019-10-18 | 西安电子科技大学 | Wireless transmitting system and its method based on frequency agility |
| CN110191454A (en) * | 2019-07-12 | 2019-08-30 | 四川长虹电器股份有限公司 | A method of the dilatation of access device quantity is realized at Zigbee coordinator end |
| CN110191454B (en) * | 2019-07-12 | 2021-06-22 | 四川长虹电器股份有限公司 | Method for realizing capacity expansion of number of access devices at Zigbee coordinator end |
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