milijunction.blogg.se - Anemometer data logger

#ANEMOMETER DATA LOGGER SERIAL#
#ANEMOMETER DATA LOGGER FULL#
#ANEMOMETER DATA LOGGER SOFTWARE#
#ANEMOMETER DATA LOGGER DOWNLOAD#

Here a dummy battery is fitted into the battery holder to complete the circuit. Suitable power input comes from either one of 3 sources.

#ANEMOMETER DATA LOGGER DOWNLOAD#

It takes approx 80 minutes to download the logger when totally filled with data. When no sleep modes are entered, the max possible days of logging are: 1.5 days The programme saves the data to a file that can be read by Microsoft Excel and from there, there are no data processing/graphing limits for you computer wizards. Simple (freeware) data logging programmes are available from Eltima, Termite, WCSC & AccessPort.

The Logger’s download of data is in ASCII format, so is suitable for programmes such as the Picaxe’s Programming Editor’s Terminal programme. Display returns to the Display Only state when the download completes. During the download process the red LED is ON, and the display is disabled. Fortunately data is only erased by overwriting so multiple downloads of the same data is possible.

#ANEMOMETER DATA LOGGER SOFTWARE#

‘Download’ firstly, it is necessary to have the download cable connected, and the appropriate software running before downloading to the computer and saving to file.

Cessation of logging by either cause results in the orange LED no longer flashing.

#ANEMOMETER DATA LOGGER FULL#

Logging continues until either all the eeprom are full or logging is turned OFF by the user. Each time this data is logged an orange LED flashes.

‘Log’ sends clock time and wind speed data to be saved on eeprom.

It starts flashing at power ON and stops at power OFF. A green ‘Power On’ LED flashes each second and is most accurate as coming from the clock IC.

‘Display Only’ gives a wind speed reading that is updated at the end of each sample time.

In operation there are 3 states of use as controlled by the main Logging switch. During sleep mode the display is also disabled though typically this would be switched off when not attended by the user. Regular brief checks are made to assess if the wind has picked up during the sleep mode. To aid power conservation and extend logging duration, a very low power Sleep Mode is entered if wind speeds drop very low. This sample time influences the number of days data can be collected over. Sample time of the wind speed can be user set from 1 second up to the international standard sample time for small wind generators of 60 seconds. Data and display shows wind speed in either kph or m/s as user set. 3x 7 segment LED display gives a local display of wind speed.

#ANEMOMETER DATA LOGGER SERIAL#

It stores data in 8x serial eeprom, so holds 2Mb of data. The completed unit is based on the PicAXE 18x. To overcome these problems I felt a stand alone anemometer datalogger was needed. There is the power supply to be sorted if it were and besides, I need to use my laptop. However on more remote sites, I’m not inclined to leave my laptop unattended whilst it records data over many days. There is no problem when close to existing dwellings as the logging laptop can be safe and powered from inside the house. I have an anemometer that can log wind speeds direct to a computer. With a known general variation, the years of weather station records can be converted to site data for a quick more long term assessment. The idea is to gather a week or so of wind data then compare that to the nearest recording site say like a weather station or airport. I have a need to assess sites for their potential as suitable for wind power generation. First the datalogger, and then how Gill made this anemometer from spare parts. The design is based on the PicAxe chip, and shows how the PicAxe can be used with EEPROM chips (24LC256's) to increase its data memory.

Gilbert ( Gill on the forums )from Cairns, Queensland Australia has put together a Aneometer with logging!

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