CN103077594A

CN103077594A - ZigBee-based wind power plant wireless data acquisition system

Info

Publication number: CN103077594A
Application number: CN2012105551660A
Authority: CN
Inventors: 彭力; 韩潇
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2012-12-20
Filing date: 2012-12-20
Publication date: 2013-05-01

Abstract

The invention belongs to the field of intelligent control and discloses a ZigBee-based wind power plant wireless data acquisition system. The ZigBee-based wind power plant wireless data acquisition system has an expatiation of a system hardware circuit and realizes wind power plant wireless data acquisition. Bottom sensor nodes of the hardware of the ZigBee-based wind power plant wireless data acquisition system join a coordinator network in a monitoring area and transmit acquired data to the coordinator network. In the cluster network, a middle router node is a data aggregation center and is used for receiving the data transmitted by all the sensor nodes and carrying out data fusion processing. An upper monitoring host is used for displaying and storing environmental monitoring data and transmits the instruction to the network. The software of the ZigBee-based wind power plant wireless data acquisition system mainly comprises a ZigBee star network. The implementation of the ZigBee star network comprises design of a coordinator node and terminal sensor nodes, data transmitting and receiving carried out by the nodes, and ZigBee star network implementation.

Description

Wind energy turbine set wireless data acquisition system based on ZigBee

One, technical field

The present invention is based on the wind energy turbine set wireless data acquisition system of ZigBee, belongs to field of intelligent control.

Two, background technology

In recent years owing to being subject to the impact that global economy relies on the fossil fuel height, and for the care to environmental problem, the alternative of generation mode is subject to increasing attention.Simultaneously, in energy market gradually under this megatrend of variation, wind energy may be one of the most promising sustainable energy.Wind all is a kind of cleaning and the inexhaustible energy in worldwide.The recently improvement of wind generating technology has made its cost greatly reduce, and under many circumstances, it becomes instinct and conventional power generation usage mode to contend with.Point out at Eleventh Five-Year Plan, approximately 9,000,000 kilowatts of the newly-increased installed capacity of wind-driven powers in the whole nation, by 2010, the wind-powered electricity generation total installation of generating capacity reached 1,000 ten thousand kilowatts.Propose simultaneously, in Gansu, the wind energy advantage area such as the Inner Mongol and Soviet Union Shanghai is coastal, focus the consruction on 30 more than 100,000 kilowatts Large Scale Wind Farm Integration and the wind-powered electricity generation base of 5 gigawatts.In addition, build up the Large Scale Wind Farm Integration of dozens of 100,000 multikilowatts in coastlands such as economically developed Jiangsu, Fujian, Shandong and Guangdong.This shows, the quantity of the wind-powered electricity generation unit that China puts into operation is increasing [2] year by year.

The normal operation of wind energy turbine set and generating need the guarantee of a lot of conditions, wherein the weather information constants such as temperature, humidity, wind speed, wind direction, pressure need stable remaining in certain scope, so in the world concern and the research of these parameters has been begun already.The Changing Pattern of the meteorologic parameters such as understanding and prediction wind energy turbine set temperature humidity is agricultural production, commercial production and daily life service, has very large actuality, therefore, gathering the relevant weather information such as wind energy turbine set humiture has great importance to the research of climate change and the fast development of wind-power electricity generation industry.

In a very long time in past, the collection of the meteorologic parameters such as wind energy turbine set temperature, humidity is artificial mode always, artificial observation does not still replace fully up to now, can there be a lot of shortcomings in the mode of this information acquisition unavoidably, such as, the accuracy of time, data precision are not high, the problem of the aspects such as poor reliability.In order to solve these shortcomings and the further development of propelling Wind Power Generation Industry, better utilize wind energy resources to benefit for the mankind, the various meteorologic parameters that need accurately investigation, grasp, analysis wind energy turbine set, therefore be necessary very much to set up the wireless data acquisition system of a wind energy turbine set meteorologic parameter, the state of Real-time Collection and the local wind energy of monitoring also carries out storage regularly, for the rule of analyzing wind energy and other application of wind energy provide reliable data foundation and technical support.Along with development and the communication apparatus of new generation of robot calculator science and technology, information science technology comes into operation, mobile communication technology and technology of wireless sensing network have obtained the development of advancing by leaps and bounds.Take full advantage of existing cordless communication network technology, progressively set up the wireless data acquisition system of wind energy turbine set, can reduce to a great extent inconvenience and limitation that artificial observation and field wiring bring.

Three, summary of the invention

The object of the present invention is to provide a kind of wind energy turbine set data acquisition scheme based on ZigBee.Specific implementation may further comprise the steps:

(1) temperature information of the required collection of wind energy turbine set is from-40 ℃ to+65 ℃, uses the collection of DS18B20 digital temperature sensor.Humidity sensor adopts SH1100 type capacitance type humidity sensor.The pressure transducer model is 24PCEFH2G, and pressure type is differential pressure, and the pressure range is 0 to 3400Pa, and power supply is 0 to 12VDC

(2) transmission of information: wind energy turbine set needs the site of the data acquisitions such as temperature, humidity, pressure a lot, objectively needs to set up a wireless near field communication network, so this design proposal adopts the ZigBee communication.

(3) microprocessor and storage mode: the volume of the data acquisition such as wind energy turbine set temperature humidity pressure and wireless communication devices is all very little, is inconvenient to use larger powered battery, therefore selects the CC2430 chip as microprocessor.Choose the SD card and carry out data storage.

In sum, single wire bus device DS18B20 digital temperature sensor and pressure transducer that system utilizes DALLAS company to produce, the data such as temperature humidity pressure that collect are nursed one's health through mimic channel, the A/D passage of sending into the CC2430 chip after conditioning is finished carries out data-switching, the collection of settling signal, data communication device after will changing is again crossed the ZigBee close range wireless communication modes and is transferred to geoceiver, processes the storage of storing the complete paired data of SD card into through single-chip microcomputer again.

The invention has the advantages that to replace the collection that artificial and field wiring is conveniently realized the various meteorologic parameters of wind energy turbine set place environment, provide enough real-time information to ensure the normal operation of wind energy turbine set to people.

Description of drawings

Fig. 1 is system global structure block diagram of the present invention;

Fig. 2 is the Hardware Design scheme;

Fig. 3 is ZigBee starshaped net topology figure;

Fig. 4 is that telegon is set up network and sensor node networking process flow diagram;

Fig. 5 is telegon receive data flow process figure;

Fig. 6 is that the null terminator Null node sends data flowchart.

Embodiment:

The present invention will be further described below in conjunction with accompanying drawing and instantiation:

A) Hardware Design:

By reference to the accompanying drawings 2, generally there are coordinator node, router node and sensor node to consist of based on the wireless data acquisition system of ZigBee technology, be applicable to star-like and data acquisition clustered network.The data that the sensor node of the bottom is responsible for adding telegon network and is collected to its transmission in the monitored area, in the clustered network, the intermediate router node is the convergence center, it is responsible for receiving the data that all the sensors node sends, and data are carried out fusion treatment, the upper strata monitoring host computer is used for showing and the data of storage environment monitoring, network is sent order.

Telegon is the distributed treatment center, belongs to full-function device, is responsible for developing and managing network, communicates by letter with PC by the UART serial port, and the user is configured and manages network by coordinator node, issue monitoring task and collection Monitoring Data.

B) design of ZigBee star net forming:

By reference to the accompanying drawings 3, Star Network is a radial system, is made of a telegon and several end sensor node devices.In this topological diagram, telegon is responsible for the management of network and the collection work of data, and the end sensor node utilizes the sensor image data, and the excessively wireless mode of data communication device is transmitted to telegon.All end sensor nodes can only be communicated by letter with telegon, and the communication between the end sensor node will be finished by the forwarding of network coordinator.

By reference to the accompanying drawings 4, PAN ID and channel parameter that the telegon networking is used all are made as default value, no longer select.Before each networking, be assigned to initial value of channel.Telegon networking on specific channel at first will be carried out 3 CCA and detect.If after detecting 3 times, channel still is then networking on this channel of free time, if anyly then change channel once for busy, re-starts detection, until detect idle channel, then networking on this idle channel.After telegon receives the sensor node request of networking, be that child node is distributed 16 network addresss, and set up neighbor list and address mapping table, the information of child node is joined in the neighbor list, set up the network connection relation with it.

By reference to the accompanying drawings 5, after telegon receives the data message of sensor node, according to the order of protocol stack MAC layer-NWK layer-APL layer the end of from and on, carry out layer by layer packet to resolve, every one deck decomposes head of packet according to frame format separately.After this information is present networks node data information certainly, information loads is extracted, otherwise abandon.Show the data message that sensor node gathers by serial ports at last.

By reference to the accompanying drawings 6, end sensor node main task is to add the telegon network and send image data to it.Behind the end sensor node power-up initializing, carry out now CCA on the initial channel and detect.If channel idle could be carried out network entry procedure at this channel, again detect otherwise will change channel.Native system sampling beacon is enable mode not, the irregular broadcast beacon frame of telegon, and node is before networking, and telegon sends beacon request in the network.After receiving beacon response, node sends connection request to telegon again, if request is correctly responded, then node networks successfully, obtains an available network address as the sign of present networks from telegon; Otherwise node networks unsuccessfully.

C) design of reduction node power consumption:

The present invention adopts ZigBee technology, has well realized the requirement of sensor node low-power consumption.The realization of this dormancy is finished by related register is set.Wherein SLEEP is the sleep pattern control register, is used for arranging four kinds of functional modes.RFPWR arranges radio-frequency power, when entering park mode, the simulation of voltage adjuster partly need to be closed.PCON is the electric source modes controller, and lowest order is set at 1 o'clock, system force to enter SLEEP set electric source modes.Must use simultaneously two registers in the design, node just can enter park mode.

CC2430 is divided into four kinds of mode of operations according to the difference of power consumption, is respectively PM0, PM1, PM2 and PM3.PM0 is the global function pattern, is used for normal operations.PM3 pattern power consumption is minimum, and all oscillators are not worked, and change the PM0 pattern over to by external interrupt, is applicable to waiting for that external event reaches the situation of low power consumpting state when triggering.PM1 and PM2 can be by resetting, and external interrupt or dormancy regularly wake the PM0 pattern that changes over to up, and PM2 is relative, and the PM1 dormancy time is long.

Design selects the PM2 pattern as the sensor node low-power consumption mode, and sleep timer adopts the RC oscillator of inner 32.768KHz that clock is provided.Although the PM3 pattern is low in energy consumption, need external interrupt or replacement just can carry out data transmit-receive control, the PM2 pattern is applicable to the long-time interior dormant state of node with respect to the PM1 pattern, and low in energy consumption, therefore selects the PM2 pattern.At first open the interruption of sleep timer (ST), with the interrupt flag bit zero clearing of ST.It is ST2:ST1:ST0 that sleep timer/skill is counted comparand register, and sleep timer counting/fiducial value read register should be read first ST0, writes register and writes ST0 after just.It is IEN0.STIE that ST interrupts enabler flags, and interrupt flag is IRCON.STIF.Be set the length of one's sleep that the sleep timer system entered and withdrawed from low-power consumption PM2 sleep pattern afterwards, and the interruption of sleep timer comes the timing wake-up sensor node to enter the PM2 pattern.

Claims

1. based on the wind energy turbine set wireless data acquisition system of ZigBee, the realization of ZigBee star network, it is characterized in that: adopt the mode of state machine that each action of protocol stack is changed, every layer of operation that has the FSM tracking to carry out of protocol stack, service call each time all can cause protocol stack from the top and under service response, protocol stack once can only be carried out a service, can judge by repeating to call apsBusy () function whether protocol stack hurries in the upper service of processing, and the state machine function of top layer is that apsFSM () is equal to the APLTask () function in the standard protocol stack.

2. the realization of sensor node low-power consumption, it is characterized in that: design selects PM2 pattern among the CC2430 as the sensor node low-power consumption mode, sleep timer adopts the RC oscillator of inner 32.768KHz that clock is provided, at first open the interruption of sleep timer (ST), interrupt flag bit zero clearing with ST, it is ST2:ST1:ST0 that sleep timer/skill is counted comparand register, sleep timer counting/fiducial value read register should be read first ST0, write register and write ST0 after just, it is IEN0.STIE that ST interrupts enabler flags, interrupt flag is IRCON.STIF, be set the length of one's sleep that the sleep timer system entered and withdrawed from low-power consumption PM2 sleep pattern afterwards, and the interruption of sleep timer comes the timing wake-up sensor node to enter the PM2 pattern.