{"id":1007664,"date":"2015-11-26T00:00:21","date_gmt":"2015-11-25T22:00:21","guid":{"rendered":"http:\/\/blog.lufft.com\/?p=7664"},"modified":"2017-09-15T15:31:45","modified_gmt":"2017-09-15T13:31:45","slug":"lufft-technology-on-special-wind-turbine-of-university-in-regensburg","status":"publish","type":"post","link":"https:\/\/blog.otthydromet.com\/en\/lufft-technology-on-special-wind-turbine-of-university-in-regensburg\/","title":{"rendered":"Lufft technology on special wind turbine of University in Regensburg"},"content":{"rendered":"

The<\/span> Electrical and Computer Engineering<\/span> student at<\/span> the University of Regensburg<\/span> Peter<\/span> Kuchenbecker<\/span> has dealt<\/span> in his bachelor thesis with the<\/span> construction of an<\/span> economic<\/span>, vertical <\/span> small wind turbine, which doesn’t require any authorization. <\/span>Moreover the construction <\/span>needed to be<\/span> portable. <\/span>For this special wind power station<\/span> <\/span>he integrated <\/span>the<\/span> Lufft<\/span> WS200<\/span> ultrasonic wind sensor among other components<\/span>. For what it is used and which other components are built-in you can read in the following blog post…
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\u00a0\"Campus_OTH_RegensburgPhoto: CC BY-SA 3.0, K4210, Wikipedia, http:\/\/tinyurl.com\/OTH-Regensburg-WS200<\/em><\/p>\n

My<\/span> bachelor project<\/span> consisted of<\/span> the<\/span> development of an independent<\/span>, mobile<\/span> small wind turbine<\/span> that<\/span> can be used flexibly<\/span> in different locations<\/span>. In<\/span> the final<\/span> version<\/span> of the new technology<\/span> a<\/span> WS200<\/span><\/a>–<\/span>UMB compact weather sensor for wind measurements (<\/span>direction and speed<\/span>) from<\/span> Lufft <\/span>is<\/span> mounted at a height of<\/span> five <\/span>meters<\/span>. This is particularly important<\/span> for<\/span> an <\/span>projected<\/span> estimation of the yearly yield of the<\/span> installation as well as for <\/span>the ongoing<\/span> monitoring of the system<\/span>.<\/span><\/p>\n

The<\/span> power of the<\/span> wind<\/span> measuring device<\/span> is supplied via<\/span> a solar panel<\/span> that enables<\/span> autonomous operation<\/span>. The sensor’s<\/span> measuring<\/span> data<\/span> are stored in a<\/span> Raspberry Pi serving as\u00a0<\/span>data logger<\/span>. In addition,<\/span> a categorization of the<\/span> wind direction<\/span> takes place<\/span> assigning<\/span> 75 percent<\/span> of the wind<\/span> of the<\/span> east and west<\/span> direction as a result<\/span>.<\/span><\/p>\n

The measuring principle<\/span> of the <\/span><\/span>used <\/span><\/span> WS200<\/span> wind sensor<\/span> is based<\/span> on<\/span> a runtime measurement<\/span> of ultrasonic pulses<\/span> in the individual<\/span> air<\/span> routes<\/span>. The framework<\/span> consists of two<\/span> measuring paths<\/span> shifted<\/span> by 90 degrees<\/span> with two<\/span> ultrasonic<\/span> transceivers<\/span>, which are<\/span> alternately<\/span> driven<\/span> for measuring<\/span> the transit time between<\/span> transmitter and receiver.<\/span><\/span><\/p>\n\n

As you can see<\/span> in the image<\/span> of the WS200<\/a> measurement<\/span> principle<\/span>, it is generally<\/span> a<\/span> rectangular<\/span> structure<\/span>, which determines the<\/span> air movement<\/span> in the X and<\/span> Y direction.<\/span> The deviations<\/span> of the air temperature and humidity<\/span> are compensated by the<\/span> reciprocal<\/span> measurement of the<\/span>\u00a0sound velocity<\/span> in<\/span> the calculation<\/span>. To save the<\/span> data<\/span> in the data center<\/span>, we created a software<\/span> background<\/span> program that<\/span> can be adjusted<\/span> with the<\/span> Lufft<\/span> USB<\/span> Config Tool<\/span><\/a>.<\/span><\/p>\n

The Raspberry Pi has the main task to inform about the sampling rate of the wind sensor and to retrieve the measurement data from the port, which it then stores depending on the configuration file. In order to connect the Raspberry Pi interface to the wind sensor, a special adapter that is easily attached to the GPIO pins, was produced.<\/p>\n

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Further information:<\/p>\n