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 pyramid mosquito net is a portable mosquito net that is ideal for mosquito protection over your bed or sleeping bag. The mosquito pyramid net is compact, lightweight and easy to use. Made from polyester mesh which creates an impenetrable bug barrier. Ideal for solo travellers, backpackers and outback campers, the pyramid mosquito netting is essential for travel in areas where mosquito-borne disease is a risk.
VALUABLE TEXTILE CO., LTD is a comprehensive modern enterprise integrating manufacturing and sales. Since its establishment in 2016, the company has risen rapidly in the Home Textile industry with its professional technical ability and mature craft production level. Valuable Textile Co., Ltd. is a manufacturer which focus on producing different kinds of indoor and outdoor mosquito nets,bed canopy, baby canopies, kid play tents. Every year, VALUABLE exported to over 20 countries and up to 2,000,000 pieces of products to the whole world.
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Valuable Textile Co., Ltd. , https://www.valuablecanopies.com