- Acoustic virtual temperature
- Arithmetic mean value
- Damping coefficient
- Damping ratio
- Delay distance
- Detection limit
- Gliding mean value
- Gray-code
- Orthogonal wind velocity vector
- Scalar wind velocity
- Serial-synchron. output
- Starting value
- Stress
- Variation
- Vectorial mean value
- Vectorial mean value with standard vectors
- Wind direction
- Wind force
- Wind run
- Wind speed
- 8-bit wind direction Gray-code
Acoustic virtual temperature
The acoustic virtual temperature is the air temperature referred to dry air without any portion of water vapour.
It is acquired by propagation measurements of sonic pulses. After respective correction of the humidity influence the procedure exceeds the accuracy of the classic procedures of the temperature measurement in a weather and thermal radiation shield.
It is acquired by propagation measurements of sonic pulses. After respective correction of the humidity influence the procedure exceeds the accuracy of the classic procedures of the temperature measurement in a weather and thermal radiation shield.
Damping coefficient
The damping coefficient characterises the oscillations of the wind vane. It is an important characteristic quantity for the qualitative evaluation of the wind vane. The damping coefficient is determined from the amplitudes of two successive excursions and is calculated by means of an equation.
Gray-code
One-increment binary code, on the changeover of one value to the next one only one single data bit modifies each to the previous and the next value respectively. The Gray-code is used for the digital determination of distances, for ex. the wind direction of a wind vane.
The code can be set up by means of any number of digits, it depends only on the required accuracy of resolution.
The code can be set up by means of any number of digits, it depends only on the required accuracy of resolution.
Orthogonal wind velocity vector
A straight line standing vertically to another straight line. By arranging two measurement distances standing vertically on each others you achieve the amount and angle of the wind velocity vector in the form of rectangular components. After measurement of the rectangular wind velocity components the amount and angle of the wind velocity can be calculated.
8-bit wind direction Gray-code
The wind direction (0 … 360 °) is converted into an 8-bit Gray code (Thies special) and transmitted. The resolution is 2.5 °, 144 increments per revolution.
Increment 0 = 0 ° = North and corresponds to the sector 0 … 2.5 °
Increment 143 = 357.5 ° corresponds to the sector 357.5 … 0 °.
Increment 0 = 0 ° = North and corresponds to the sector 0 … 2.5 °
Increment 143 = 357.5 ° corresponds to the sector 357.5 … 0 °.