SU530255A1 - Device for measuring average wind direction - Google Patents

Description

Comparison node 3, dividing circuit 4 and reverSer 1 counter 5

The wind direction sensor is used to obtain primary information about the wind.

The analog-to-digital converter is used to convert the output information from the wind direction sensor to a numeric code corresponding to the current wind direction value. This numeric code is updated and fed to one input of the comparison node cyclically, with the cycle duration being constant and determined by the resolution of the sensor and the required measurement accuracy. Timestamps; the corresponding Beginning of each cycle is also formed in the code converter and is fed from its output to the input of the division circuit.

The comparison node performs the following functions: comparing two input numeric codes and calculating the difference taking into account the sign; analysis of this difference adi. but to the module and the sign; code generation (360); the formation of the command controlling the reversible counter (addition - vychtenania).

The result of the analysis of the value of ck. it also determines which code goes from the output of the comparison node to the input of the dividing scheme - either L, 1, or 360 ° - / & dL |.

The division scheme is used to obtain the partial from division of one numerical code to another, arriving at two different inputs of the node, and both the dividend and the divider in the general case are not constant. of time. Correction of this information is made by adding or subtracting the pulses fed to the input of the counter, and its control mode (addition - subtraction) is controlled by the control input of the reversible counter.

In the initial state, the reversible counter 5 is reset. The capacity of the reversible counter in terms of degrees is 360

At the moment of the beginning of the averaging process from the analog-digit converter 2, the first impulse (time mark) corresponding to the beginning of the first cycle arrives at the input of dividing circuit 4. The number of such pulses is summed in the division scheme and is a divisor. Consequently, in the first cycle the division by 1 will be performed.

Then, information about the current value comes from converter 2 to one input of comparison node 3, to another input of this node information is received about the average value of wind winding during the time elapsed from the beginning. Node 3 compares the values received at its inputs, i.e. analyzes the difference in magnitude and sign, after which the signal from its output is fed to the input of the 4 dividing circuit, and from another output of node 3, the addition or subtraction command is sent to the control input of the reversible counter.

Thus, at any time, the reversible counter 5 will find the average wind direction over the period of time elapsed since the start of the measurement, and the wind direction will be determined without error in any change in wind direction.

Claims (3)

1.Avt. St. No. 243970, class G 01 R 13/02, 12.07.67 2. Avt. St. No. 363923, cl. G 01 R 13/00, 11.01.71 3., Auth. St. No. 421932, cells, G 01 R 5/08, 12.08.71, the (prototype).