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In the natural environment, wind speed and wind direction may vary randomly. In order to accurately measure wind vector information, the wind anemometer takes two pairs of ultrasonic transducers that are integrated into each other and are placed perpendicular to each other. The ultrasonic drive unit receives commands from the CPU and generates them. The pulse of the ultrasonic probe is driven, and the ultrasonic probe is driven to emit ultrasonic waves; the time measuring unit is connected to the ultrasonic transmitting and receiving circuit.
The time for the ultrasonic wave measured by the wind anemometer to be transmitted from transmission to reception; the operation and processing unit is used for data collection, processing, and issuing various control commands; the communication interface unit provides the user terminal with a corresponding digital interface for data Communication; The power supply unit converts the input power to the voltage required by the various parts of the system.
The signal received by the ultrasonic probe in the wind anemometer is very weak, and corresponding amplification must be performed to correctly determine its arrival time. First, the received signal is amplified enough by the op amp and then sent to the Schmitt trigger. It becomes a digital signal that can be recognized by the CPLD, and finally its arrival time is measured by the CPLD.
The principle of the detection design principle in wind anemometer is based on a variety of different methods. The main feature of the instrument development is that it will not cause the parts to rotate continuously and bring about certain wear and tear, and even the phenomenon of aging. The speed of wind anemometer measurement has been widely used in the detection of various natural phenomena and environmental climate in agriculture. The application of this anemoscope in other fields has very promising prospects.
October 24, 2024