ICSET 2008 PC Based Wireless Wind Data Analyser R L Badami, Ashok S, Suresh H Jangamshetti Faculty in E&E Dept. . Asst. Prof of EED, Professor, E&E Dept. B.V.V.S Polytechnic, National Institute of Technology , Basaveshwar Engineering College Bagalkot. Calicut. Bagalkot. Karnataka, India . Kerala, India. Karnataka, India. revanbadami@yahoo.co.in ashoks@nitc.ac.in suresh.j@ieee.org Abstract: This paper presents the development and implementation of a wireless wind data analyser. The proposed analyser employs the Global System for Mobile technology to read and transmit the wind data to a PC located at the work place. The output of anemometer is processed by microcontroller and transmitted to a personal computer via dedicated transmitter-receiver mobiles. The receiver mobile is interfaced to a personal computer, where the received wind data is analyzed to assess the wind potential, annual energy yield and siting. Two cup type anemometers, set up at different heights, are used for testing the proposed wind monitoring system. The output is compared with the wind data recorded using NRG wind data logger. The results are accurate. The proposed data logger can be effectively used for recording wind data from remote places. IINTRODUCTION Research has shown that employing effective statistical tools for wind data analysis helps in optimum site matching of wind turbines [1-4]. It has been established that use of cubic mean cube root of wind velocities gives better estimate of power in the wind [1]. Hence, accurate measurement of wind data is an essential requirement and is done using wind data loggers. Existing wind data loggers store the arithmetic mean of wind velocities recorded over a period of time in a dedicated memory card. It requires replacing memory card at frequent intervals, which is tedious and is prone to data loss. Hence there is a need to overcome the said drawbacks of the conventional method of wind data recording. This paper presents the development and implementation of a wireless wind data analyser. The proposed analyser employs the Global System for Mobile technology (GSM) to read and transmit the wind data to a PC located at the work place. The output of anemometer is processed by microcontroller and transmitted to a personal computer via dedicated transmitter-receiver mobiles. Two cup type anemometers, set up at different heights, are used for testing the proposed wind monitoring system. The output of cup type anemometer is a low sine wave with its frequency proportional to wind speed. This signal is converted into pulses by schimt trigger circuit. A frequency counter counts the pulses every 30 seconds. The output of frequency counter is given to a microcontroller AT89S8252, where these pulses are stored. After every fifteen minutes these are transmitted to a remote personal computer through wireless transmission mode using GSM module. The receiver mobile transfers the pulse count to a personal computer. The data is further analyzed to assess the wind potential, annual energy yield and optimum site matching. Comparing with the wind data measured using NRG wind data logger validates the accuracy of the data recorded using the proposed system. II METHODOLOGY OF SYSTEM DEVELOPMENT The overall architecture of the proposed wind monitoring system is as shown in Fig.1. The system has two major components, viz, Remote Transmitter Module attached to the Cup type anemometers and the Receiving Module interfaced to the personal computer. Dedicated interactive software is developed to manage the wind database. The Graphical User Interface (GUI) facilitates the user to view the wind data and the results. Fig.1 Block diagram of Wind Monitoring System. III DESCRIPTION OF HARDWARE DEVELOPMENT 1) Transimitter Section:The system hardware is divided into three modules as shown in Fig.1, the interface card at the remote transmitter side, the PC at the receiving side and the GSM modem/user mobile phone modules. The remote transmitter module is used to acquire, process, transmit the parameters to the GSM modem. A PC-based server, located at the receiver side is connected to the GSM modem, which receives SMS from the remote transmitter side, via the GSM network. The GSM module/user mobile phone module is the link between the remote module and the public GSM networks. A functional block diagram of the transmitter module is shown in Fig.2. The frequency is measured using microcontroller (AT89C2051). Two separate microcontrollers are used for two anemometers and outputs of these anemometers are converted to square wave by Schmitt trigger. The output of Schmitt trigger is given to microcontrollers (AT89C2051). The pulses generated by Schmitt trigger are counted. The frequency is 474 978-1-4244-1888-6/08/$25.00 c  2008 IEEE Authorized licensed use limited to: Basaveshwar Engineering College. Downloaded on June 4, 2009 at 01:09 from IEEE Xplore. Restrictions apply.