SU1545169A1 - Digital portable anemometer - Google Patents

Abstract

The invention relates to measuring the speed of air currents and can be used in meteorology. The aim of the invention is to improve the measurement accuracy. When measuring the wind speed of the wind receiver, it rotates and at the output of the primary measuring transducer 1 a number-pulse signal corresponding to the wind speed is formed. The pulses from the output of the converter 1 are fed to the inputs of the device 2 for the correction of the division factor and the counter 7 pulses. The pulse counting is performed according to the program of operation of the device 2 for the correction of the division factors, the output of which is connected to the counter of 7 pulses, and the program of operation of the device 2 is selected depending on the signal of the decoder 3, taking into account the type of the connected primary measuring transducer 1. -linear approximation of the number of pulses as a function of air speed, thereby improving measurement accuracy. 1 il.

Description

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The invention relates to a measurement technique, namely to measuring the speed of air currents, and can be used in meteorology, in areas of the agro-industrial complex.

The purpose of the invention is to improve the accuracy when using wind receivers with different sensitivity and operating range.

The drawing shows a structural block diagram of the anemometer.

The anemometer contains primary measuring transducer 1, device 2 for dividing coefficient correction, decoder 3, reference generator 4, control device 5, power supply control circuit 6, pulse counter 7, amplifier 8, indicating device 9

Structurally, the primary measuring transducer 1 is executed as an external unit and converts the rotational speed of the wind receiver to a number-pulse signal, and also forms an additional code carrying information about the type and characteristics of the connected converter (the code can be set with jumpers in the block connector).

The pulses from the output of the primary measuring converter are fed to the inputs of the device 2 for dividing factor correction and counter, 7 pulses, and the additional code through the decoder 3 is fed to control device 5 and device 2 for dividing factor correction. The latter compares the input frequency coming from the primary measuring transducer 1 with the reference frequencies coming from the reference oscillator 4, and determines the conversion factor of the pulse counter 7, taking into account the information coming from the decoder 3.

The reference generator 4 provides all the clock frequencies (for example, 32768, 64, 2 and 1 Hz) required for operation of the anemometer, which are fed to the division correction factor device 2 and the control device 5.

The control device 5 synchronizes the operation of the anemometer. Signals from the

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the reference generator 4 and information on the power supply of the anemometer from block 6, through the decoder 3 information about the type of primary measuring transducer 1 used. The output of the control unit is connected to the inputs of the division correction device, the pulse counter and the indicator device 9.

The power supply control circuit 6 is designed to control the power supply, its output is connected directly to the control device 5. The pulse counter 7 counts the pulses coming from the primary transducer, its output through the amplifier 8 is connected to the indicator device 9. The control of the operating modes of the indicator device 9 is performed by the control device.

Thus, when measuring the wind speed, the wind receiver rotates and a number-pulse signal corresponding to the wind speed is generated at the output of the primary measuring converter. The pulses from the output of the primary measuring converter are fed to the inputs of the device for the division of the division factor and the pulse counter.

Pulse counting is performed according to the program of the division factor correction device, the output of which is connected to a pulse counter, and the program selection of the division factor correction device is performed according to the signal of the decoder depending on the type of the connected primary measuring transducer. By means of a division factor correction device in the anemometer, a piecewise linear approximation of the number of pulses depending on the speed of the air flow is carried out, thereby improving the measurement accuracy.

Claims (1)

Invention Formula Digital portable anemometer containing primary measuring transducer including wind receiver with speed transducer 5 1545169 wind in a pulse number signal, and the decoder input is connected to the output a digital device including a reference primary measuring converter, a control device, a caller, a decoder outputs — with a power supply control level monitor, correction device moves, a pulse counter, an amplifier and an indicator of the division and control, inputs katorny device, about tl and h and y-correction devices are connected to u and with the fact that, for the purpose of higher-output primary converter, .in the accuracy of measurement, in it introduced the reference generator and the device the decoder and correction device 1Q are displayed, and its output is connected to dividing coefficient, with a pulse counter.