Function Anemometer
Observation of the elements of weather and climate requires meteorological instruments that are sensitive, robust, simple and precise. Judging from the way the reading, the meteorological instrument consists of two types, namely:
Recording is a tool that can record data continuously, since the installation until the turn of the next tool. Example: barograf and anemograf.
Observation of the elements of weather and climate requires meteorological instruments that are sensitive, robust, simple and precise. Judging from the way the reading, the meteorological instrument consists of two types, namely:
Recording is a tool that can record data continuously, since the installation until the turn of the next tool. Example: barograf and anemograf.
Non-recording is a tool that is used when data must be read at certain times to obtain data. Example: barometer, ermometer and anemometer.
Anemometer is an instrument used to measure wind speed and direction. Meteorological unit of wind speed is Knots (Beaufort Scale). While the meteorological unit of wind direction is 0o - 360o and direction of the wind. Anemometer must be placed in open areas.During the breeze, propeller / bowl found on the anemometer will move in the direction of the wind. The greater the wind speed blowing bowls are, the faster the rotation speed of disc bowls. From the number of rounds in one second then can be seen the wind speed . Inside there anemometer enumerator tool that will calculate the wind speed. The result means the enumerator recorded, then matched with Beaufort.c Scale Figure Anemometer is:
Anemometer is an instrument used to measure wind speed and direction. Meteorological unit of wind speed is Knots (Beaufort Scale). While the meteorological unit of wind direction is 0o - 360o and direction of the wind. Anemometer must be placed in open areas.During the breeze, propeller / bowl found on the anemometer will move in the direction of the wind. The greater the wind speed blowing bowls are, the faster the rotation speed of disc bowls. From the number of rounds in one second then can be seen the wind speed . Inside there anemometer enumerator tool that will calculate the wind speed. The result means the enumerator recorded, then matched with Beaufort.c Scale Figure Anemometer is:
Type Anemometer
Anemometer itself there are two general types. Type are as follows:
Anemometer itself there are two general types. Type are as follows:
a. Anemometer with three or four bowls
The sensor consists of three or four fruit bowls mounted on a radius centered on a vertical axis or all of the bowl is mounted on a vertical axis. The whole bowl is facing a circular direction so that when the wind blows on direction of the rotor spinning equipment. Rotational speed of the rotor depends on the speed of the wind. Through a system of mechanical gears, rotor rotation rate set accumulation system pointer distance wind. Anemometer type "cup counter" can only measure the average wind speed during a period of observation. With this tool the addition of value that can be read from one observation to the next observation, stating the mileage accumulation wind during the time of the second observation, so that the wind speed is equal to the accumulated mileage is divided long interval of observation.
The sensor consists of three or four fruit bowls mounted on a radius centered on a vertical axis or all of the bowl is mounted on a vertical axis. The whole bowl is facing a circular direction so that when the wind blows on direction of the rotor spinning equipment. Rotational speed of the rotor depends on the speed of the wind. Through a system of mechanical gears, rotor rotation rate set accumulation system pointer distance wind. Anemometer type "cup counter" can only measure the average wind speed during a period of observation. With this tool the addition of value that can be read from one observation to the next observation, stating the mileage accumulation wind during the time of the second observation, so that the wind speed is equal to the accumulated mileage is divided long interval of observation.
b. Thermal Anemometer
This anemometer is a sensor used to measure the fluid velocity (wind) for a moment. The workings of this sensor is based on the number of the convective heat loss from the sensor to the environment around the sensor. The amount of heat transferred from the sensor is directly related to the fluid velocity passing through the sensor. If only the fluid velocity is changed, then the heat loss can be interpreted as the fluid velocity. Anemometer Work follows the principle of Pitot tube, which is calculated from static pressure and velocity pressure.
Anemometer Measurement Process
Here are examples of simple calculations the wind speed measured by anemometer three bowls. The length of the circle composition bowls is 3 m, and the arrangement was at one time spinning 20 times in 10 seconds, then the wind speed can be calculated: [(20x3) / 10 m = 6 m / sec]
To facilitate the counting round of the plate, one cup anemometer was given another color.
Here are examples of simple calculations the wind speed measured by anemometer three bowls. The length of the circle composition bowls is 3 m, and the arrangement was at one time spinning 20 times in 10 seconds, then the wind speed can be calculated: [(20x3) / 10 m = 6 m / sec]
To facilitate the counting round of the plate, one cup anemometer was given another color.
In connection with because of differences in wind speed from a variety of different heights, the installation of anemometer height is usually adjusted with the purpose or usefulness. For the field agroklimatologi fitted with a height sensor (cup) 2 meters above ground level. To collect supporting data for Class A Pan evaporation measurements, anemometer mounted 0.5 m tall In general airfield installation height of 10 m. Installed in the area open at stake is strong enough. For the purposes of navigation appliance must be installed at a distance of 10 x high barrier factors such as buildings or trees. Most of these Anemometer generally can not record wind speeds below 1-2 miles / hour because there is friction factor of what the early rounds.
Anemometer Calibration Process
Anemometer calibration process is done periodically for performance of recording and the results remained stable and good. The following sequence of anemometer calibration process.
Anemometer calibration process is done periodically for performance of recording and the results remained stable and good. The following sequence of anemometer calibration process.
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