CN205426948U - Ultrasonic wave wind meter based on zigbee wireless network - Google Patents
Ultrasonic wave wind meter based on zigbee wireless network Download PDFInfo
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- CN205426948U CN205426948U CN201620220284.XU CN201620220284U CN205426948U CN 205426948 U CN205426948 U CN 205426948U CN 201620220284 U CN201620220284 U CN 201620220284U CN 205426948 U CN205426948 U CN 205426948U
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Abstract
本实用新型公开了一种基于Zigbee无线网络的超声波测风仪，包括采集控制器、超声波检测模块、无线传输模块和上位机，无线传输模块采用星型网络拓扑结构的Zigbee无线网络，包括多个传感器节点和一个协调器节点，采集控制器连接Zigbee通信单元作为传感器节点，采集控制器获取由超声波检测模块传递的传播时间计算出风速风向，并将其发送给协调器节点，协调器节点的输出端连接上位机，协调器节点用于向上位机上传从所有采集控制器接收到的风速风向数据和接收上位机发送的控制命令。本实用新型通过Zigbee无线网络实现上位机可以远程发送控制指令、实时监测风电场中风速风向的变化，且无需布线，传输距离远。
The utility model discloses an ultrasonic anemometer based on a Zigbee wireless network, which includes an acquisition controller, an ultrasonic detection module, a wireless transmission module and a host computer. The wireless transmission module adopts a Zigbee wireless network with a star network topology, including multiple The sensor node and a coordinator node, the acquisition controller is connected to the Zigbee communication unit as the sensor node, the acquisition controller obtains the propagation time transmitted by the ultrasonic detection module to calculate the wind speed and direction, and sends it to the coordinator node, the output of the coordinator node The terminal is connected to the upper computer, and the coordinator node is used to upload the wind speed and direction data received from all acquisition controllers to the upper computer and receive the control commands sent by the upper computer. The utility model realizes that the upper computer can remotely send control instructions and monitor the change of wind speed and direction in the wind farm through the Zigbee wireless network, without wiring, and the transmission distance is long.
Description
Technical field
This utility model relates to a kind of ultrasonic wind meter, is specifically related to a kind of ultrasonic wind meter based on Zigbee wireless network, belongs to wind speed and direction field of measuring technique.
Background technology
Wind Power Utilization also has become as one of important aspect solving global energy problem.The wind-power electricity generation cause of China is the most progressively carried out at present, and the investigation of wind energy resources is to set up the work that wind-power electricity generation place must be done.Size and the persistent period of effective wind speed of this area wind speed is depended in the storage of wind energy.In order to the place and wind energy of setting up wind energy turbine set are estimated, the probability of decision-making wind energy development, scale and potential ability, so anemometer will be installed in some places, and the host computer that the wind speed and direction data surveyed are transferred to monitoring station carries out real-time monitored.
At present, existing anemometer mainly includes mechanical type anemometer, heat-sensitive type anemometer and ultrasonic wind meter etc., wherein ultrasonic measurement anemometer, because not having the mechanical part of activity, has and is applicable to badly to measure environment and the measurement result advantage such as accurately, be increasingly becoming the main flow of anemometer.But current most ultrasonic wind meter is by wire transmission mode, data to be transferred to the host computer of monitoring station, use the ultrasonic wind meter that wired mode carries out data transmission, its wiring is complicated, anti-interference is poor and difficult in maintenance, it is impossible to distance data transmission.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, it is provided that a kind of ultrasonic wind meter based on Zigbee wireless network, solves the technical problem that in prior art, wire transmission wiring is complicated, difficult in maintenance.
nullFor solving above-mentioned technical problem，This utility model provides a kind of ultrasonic wind meter based on Zigbee wireless network，Including acquisition controller、The ultrasound examination module being connected with acquisition controller and host computer，The propagation time that acquisition controller acquisition is transmitted by ultrasound examination module calculates wind speed and direction，And wind speed and direction data are uploaded to host computer，It is characterized in that，Also include wireless transport module，Wireless transport module uses the Zigbee wireless network of star network topology，Including multiple sensor nodes and a coordinator node，Acquisition controller connects Zigbee communication unit as sensor node，Zigbee communication unit outfan connects the input of coordinator node，Acquisition controller is used for obtaining wind speed and direction data，And send it to coordinator node，The outfan of coordinator node connects host computer，Coordinator node is used for setting up and manage Zigbee wireless network，Upload the wind speed and direction data received from all acquisition controllers to host computer and receive the control command that host computer sends.
Further, described ultrasound examination module includes that 3 pairs of ultrasonic sensors and multiplexer channel select unit, 3 pairs of ultrasonic sensors are placed according to three-dimensional cartesian coordinate system, the every pair of ultrasonic sensor is the most relative and any two pairs of ultrasonic sensors are mutually perpendicular to, each ultrasonic sensor connects multiplexer channel respectively and selects unit, multiplexer channel selects unit input to connect acquisition controller, acquisition controller sends select command and selects unit to multiplexer channel, makes only have a pair ultrasonic sensor on certain coordinate axes to work every time simultaneously.
Further, described ultrasound examination module also includes that ultrasonic drive circuit and ultrasound wave receive circuit, the input of ultrasonic drive circuit connects acquisition controller, and outfan connects ultrasonic sensor, for being amplified driving ultrasonic sensor by the ultrasound wave that acquisition controller sends；Ultrasound wave receives the input of circuit and connects ultrasonic sensor, and outfan connects acquisition controller, sends into acquisition controller after being filtered the ultrasound wave received processing.
Further, also including Temperature Humidity Sensor, the outfan of Temperature Humidity Sensor connects acquisition controller, and wind speed and direction data are compensated and corrected by acquisition controller according to the humiture data gathered.
Further, also including display unit, the input of display unit connects acquisition controller, for showing the numerical value of wind speed and direction.
Further, acquisition controller uses LPC1768 single-chip microcomputer.
Further, Zigbee communication unit uses CC2530 chip.
Further, Temperature Humidity Sensor uses SHT71 model sensor.
Compared with prior art, this utility model is reached to provide the benefit that:
1) this utility model uses Zigbee wireless communication, acquisition controller is transferred to coordinator node the wind speed and direction data surveyed by ZigBee communication unit, and then it being uploaded to host computer, it is achieved host computer can remotely send the change of control instruction, the in real time wind speed and direction of monitoring wind energy turbine set；
2) ultrasound examination module of the present utility model uses three-dimensional time difference method calculation of wind speed wind direction, it is possible to fast accurate calculates wind speed and direction numerical value, improves certainty of measurement and the resolution of system；
3) this utility model can complete wind speed and direction based on temperature and humidity compensation calculating so that ultrasonic wind meter, under the severe environmental conditions such as misty rain, realizes accurate, real-time measurement to wind farm wind velocity value；
4) this utility model is easy to use, low cost, low in energy consumption, and universality is strong.
Accompanying drawing explanation
Fig. 1 is the principle schematic of this utility model ultrasonic wind meter；
Fig. 2 is the structural representation of a kind of embodiment of acquisition controller in this utility model ultrasonic wind meter；
Fig. 3 is the arrangement schematic diagram of this utility model ultrasonic sensor.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is further described.Following example are only used for clearly illustrating the technical solution of the utility model, and can not limit protection domain of the present utility model with this.
nullAs Figure 1-3，A kind of ultrasonic wind meter based on Zigbee wireless network of the present utility model，Including acquisition controller、The ultrasound examination module being connected with acquisition controller and host computer，The propagation time that acquisition controller acquisition is transmitted by ultrasound examination module calculates wind speed and direction，And wind speed and direction data are uploaded to host computer，It is characterized in that，Also include wireless transport module，As shown in Figure 1，Wireless transport module uses the Zigbee wireless network of star network topology，Including multiple sensor nodes and a coordinator node，Acquisition controller connects Zigbee communication unit as sensor node，Zigbee communication unit outfan connects the input of coordinator node，Acquisition controller is used for gathering wind speed and direction data，And send it to coordinator node，The outfan of coordinator node connects host computer，Coordinator node is used for setting up and manage Zigbee wireless network，Upload the wind speed and direction data received from all acquisition controllers to host computer and receive the control command that host computer sends.Host computer can use PC computer.
nullFurther，Described ultrasound examination module uses three-D ultrasonic wave sensor to measure wind speed and direction，Use 6 ultrasonic sensors，Each ultrasonic sensor had both had emission function and had also had receive capabilities，Ultrasonic sensor can use employing model to be the transmitting-receiving integrated sensor of DYA-125-02A，It is divided into 3 groups，Often group ultrasonic sensor is put relatively along rectangular coordinate system in space respectively，Spatially form a three-dimensional coordinate system，The i.e. every pair ultrasonic sensor is the most relative and any two pairs of ultrasonic sensors are mutually perpendicular to，Each ultrasonic sensor connects multiplexer channel respectively and selects unit，Multiplexer channel selects unit input to connect acquisition controller，Multiplexer channel selects unit can use 74LS151 MUX，Acquisition controller sends select command and selects unit to multiplexer channel，Make only have a pair ultrasonic sensor on certain coordinate axes to work every time simultaneously.As shown in Figure 3, ultrasound senor position direction is expressed as the X of rectangular coordinate system, Y, tri-axles of Z, in figure, the X-axis direction of arrow represents from west to east, and X-direction arranges ultrasonic sensor 1 and ultrasonic sensor 2, the Y-axis direction of arrow represents from south to north, Y direction arranges ultrasonic sensor 3 and ultrasonic sensor 4, and the Z axis direction of arrow represents from bottom to top, and Z-direction arranges ultrasonic sensor 5 and ultrasonic sensor 6.Every pair of ultrasonic sensor distance is typically chosen as 200mm.
Three-dimensional time difference method is in prior art, time difference in three dimensions is utilized to carry out calculation of wind speed, ultrasound wave is during air borne, a speed difference is there is with upwind when propagating with the wind, when propagating fixing distance, this speed difference reflects a time difference, and this time difference is linear with wind speed to be measured.
As a example by east-west direction X-axis, first the ultrasonic sensor 1 of position, west is as transmitting probe, the ultrasonic sensor 2 of position, east is as receiving transducer, measure the time t1 needed for transmission, after postponing a period of time, the ultrasonic sensor 2 of position, east is as transmitting probe, the ultrasonic sensor 1 of position, west is as receiving transducer, measure the time t2 needed for transmission, distance between two ultrasonic sensors in known X-axis, the wind speed component of X-direction can be calculated according to transmission time t1 and t2 received, according to X-axis wind speed Computing Principle, the wind speed component of Y-axis and Z axis can be measured respectively, the wind speed of natural wind be three directions wind vector and.
A kind of embodiment of sensor node of the present utility model, as shown in Figure 2, ultrasound examination module also includes that ultrasonic drive circuit and ultrasound wave receive circuit, the input of ultrasonic drive circuit connects acquisition controller, outfan connects ultrasonic sensor, for being amplified driving ultrasonic sensor by the ultrasound wave that acquisition controller sends；Ultrasound wave receives the input of circuit and connects ultrasonic sensor, and outfan connects acquisition controller, sends into acquisition controller after being filtered the ultrasound wave received processing.Owing to ultrasound wave exists decay in communication process, so in order to ensure the intensity of receiving end signal, needing to improve amplitude at sound source, it is therefore desirable to ultrasonic drive circuit.Ultrasound wave receive circuit include RC filter circuit, amplifying circuit, low-pass filter circuit, A D change-over circuit, fifo circuit.The ultrasonic signal received is converted into analogue signal by ultrasonic sensor, this analogue signal is delivered to amplifying circuit after RC filter circuit and is carried out signal amplification, signal after amplification filters the interference signal in the external world through low-pass filter circuit, final signal enter A be converted to digital signal after D change-over circuit and be stored in data buffer FIFO and store, the data of storage are sent into acquisition controller.
Being based in the principle of wind speed determined above during certain axial measuring wind speed, the speed of ultrasound wave is identical.It is that comparison is high that this measuring method changes little ideally precision in humiture, but owing to the velocity of sound in air is affected bigger by ambient temperature, humidity, the environment changed greatly in humiture when ultrasonic sensor uses, if without bigger measurement error can be produced during temperature and humidity compensation, affecting certainty of measurement.The error brought to can effectively compensate humiture degree to change, further, also include Temperature Humidity Sensor, the outfan of Temperature Humidity Sensor connects acquisition controller, wind speed and direction data are compensated and corrected by acquisition controller according to the humiture data gathered, to obtain wind speed and direction value more accurately.Temperature Humidity Sensor can use SHT71 sensor, SHT71 sensor to have, and response is rapid, capacity of resisting disturbance is strong, cost performance advantages of higher, it is possible to accurately measures humiture, reduces the cost of this anemometer.
Further, also include display unit, as in figure 2 it is shown, the input of display unit connects acquisition controller, for showing the numerical value of wind speed and direction.Display unit can use 12864 LCDs, and display wind speed and direction numerical value now, facilitates user to watch in real time.
Further, acquisition controller uses LPC1768 single-chip microcomputer.Acquisition controller uses LPC1768 single-chip microcomputer.LPC1768 is microcontroller based on ARMCortex-M3 kernel, and operating rate is high, and operation frequency is up to 100MHz, low-power consumption.
Further, Zigbee communication unit uses CC2530 chip.Chip CC2530 has higher sensitivity, and capacity of resisting disturbance is strong, and in the case of being not added with power amplification, outdoor transmissions distance, up to 400m, can realize Long-range Data Transmission by increasing power amplifier.
The work process of this utility model ultrasonic wind meter is, host computer sends sets up Zigbee wireless network order to coordinator node, coordinator node starts building network after starting, during networking, coordinator node is according to the regulation of Zigbee protocol, a series of session is carried out between each layer, as the acquisition controller access network of sensor node, until Zigbee wireless network is set up successfully.nullWhen after networking success，Acquisition controller first gathers the wind speed of X-direction，Detailed process is: first ultrasonic sensor 1 is as transmitting terminal，Ultrasonic sensor 2 is as receiving terminal，Acquisition controller sends the ultrasound wave square-wave signal of standard and is amplified rear drive ultrasonic sensor 1 through ultrasonic drive circuit，The signal received is sent into acquisition controller after ultrasound wave receives processing of circuit by corresponding ultrasonic sensor 2，Calculate the ultrasonic sensor 1 transmission time t1 to ultrasonic sensor 2，After time delay 10s certain time，Ultrasonic sensor 2 is as transmitting terminal、Ultrasonic sensor 1 is as receiving terminal，Acquisition controller sends the ultrasound wave square-wave signal of standard and is amplified rear drive ultrasonic sensor 2 through ultrasonic drive circuit，The signal received is sent into acquisition controller after ultrasound wave receives processing of circuit by corresponding ultrasonic sensor 1，Calculate the ultrasonic sensor 2 transmission time t2 to ultrasonic sensor 1，Acquisition controller calculates the wind speed of X-direction according to transmission time difference，Temperature Humidity Sensor is measured current humiture data and is uploaded to acquisition controller，The wind speed of the acquisition controller X-direction to calculating carries out temperature and humidity compensation，Obtain the wind speed of accurate X-direction，Method the most according to this，Calculate the wind speed of Y direction and the wind speed of Z-direction successively，And then calculate actual wind speed according to three's vector，The wind angle on each direction of principal axis is being calculated by the anemometer of each axle，Wind speed and direction numerical value transmission LCDs is shown in three-dimensional system of coordinate by acquisition controller.The wind speed and direction data of acquisition are uploaded to coordinator node by Zigbee communication unit by all acquisition controllers, and the data received are reached host computer by coordinator node.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; on the premise of without departing from this utility model know-why; can also make some improvement and modification, these improve and modification also should be regarded as protection domain of the present utility model.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199063A (en) * | 2016-08-09 | 2016-12-07 | 北京雨根科技有限公司 | A kind of ultrasound wave three-dimensional wind direction and wind velocity sensor |
| CN106815996A (en) * | 2016-12-05 | 2017-06-09 | 北京普华亿能风电技术有限公司 | A kind of signal transmission system of wind resistance shadow anemometer tower |
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2016
- 2016-03-22 CN CN201620220284.XU patent/CN205426948U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199063A (en) * | 2016-08-09 | 2016-12-07 | 北京雨根科技有限公司 | A kind of ultrasound wave three-dimensional wind direction and wind velocity sensor |
| CN106815996A (en) * | 2016-12-05 | 2017-06-09 | 北京普华亿能风电技术有限公司 | A kind of signal transmission system of wind resistance shadow anemometer tower |
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Effective date of registration: 20231122 Address after: 211500 No. 59 Wang Qiao Road, Xiongzhou Street, Liuhe District, Nanjing City, Jiangsu Province Patentee after: Nanjing Xiaoyang Electronic Technology Co.,Ltd. Address before: 210019 No. 69 Olympic Sports street, Jianye District, Jiangsu, Nanjing Patentee before: Nanjing University of Information Science and Technology |