Zigbee network-based direction self-calibration ultrasonic wind measuring system and method

Abstract

The invention provides a Zigbee network-based direction self-calibration ultrasonic wind measuring system and method. A virtual machine coordinate system-based Zigbee network of a topological structure is established through a plurality of Zigbee protocol-based wireless transmission modules; each Zigbee network node comprises two pairs of ultrasonic probes; the probes in each pair are opposite to each other, and the two pairs of ultrasonic probes are vertically arranged in a crossing manner; the wind speeds in two branch directions are calculated by acquiring the propagation time of ultrasonic wave of each pair of probes and the space between two probes; wind speed vectors in the two directions are synthesized to obtain the speed and the direction of natural wind; the actual direction of the natural wind is obtained by acquiring the locating positions of the Zigbee network nodes and the deflection angle of the geomagnetic north pole through an electronic compass.

Description

technical field [0001] The invention relates to an ultrasonic wind measurement system, in particular to a Zigbee network-based self-calibrating ultrasonic wind measurement system and method. Background technique [0002] At present, existing anemometers mainly include mechanical anemometers, heat-sensitive anemometers, and ultrasonic anemometers. Mechanical anemometers have mechanical rotating parts, which have high requirements for the measurement environment. They cannot work normally in environments such as sand, dust, low temperature, and icing, and there are moving parts that are easy to wear and have a short life. Limited by the mechanical structure and measurement principle, the measurement accuracy of the mechanical anemometer is low. [0003] The basic principle of the thermal anemometer is to heat the object placed in the airflow to a certain temperature, and calculate the wind speed by calculating the heat loss of the object. Thermal anemometers are greatly affe...

AI Technical Summary

Problems solved by technology

However, the existing ultrasonic anemometers need to consider the influence of the climate environment on the ultrasonic propagation speed when measuring wind speed, and need to manually calibrate the direction, and the single node works alone, so it cannot accurately measure the wind speed and direction in the required area

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