초록 ▼

An ultrasonic anemometer wherein there is a fixed supporting framework, transmitter-receiver piezoelectric transducers spaced a predetermined distance apart and making known angles between them, a generator of ultrasonic waves to excite said transmitters, each receiver being connected to an impedanc

An ultrasonic anemometer wherein there is a fixed supporting framework, transmitter-receiver piezoelectric transducers spaced a predetermined distance apart and making known angles between them, a generator of ultrasonic waves to excite said transmitters, each receiver being connected to an impedance matching circuit, a phasemeter and display means, the phasemeters relating to the various receivers being connected to a computer.

대표청구항 ▼

An ultrasonic anemometer comprising three transmitter-receiver pairs, the transmitter and receiver of each pair being spaced apart along one of three mutually perpendicular axes, an ultrasonic wave generator electrically coupled to said transmitter and energizing said transmitter to produce acoustic

An ultrasonic anemometer comprising three transmitter-receiver pairs, the transmitter and receiver of each pair being spaced apart along one of three mutually perpendicular axes, an ultrasonic wave generator electrically coupled to said transmitter and energizing said transmitter to produce acoustic waves, a supporting structure supporting said transmitter-receiver pairs so that said transmitter-receiver pairs define a rectangular tetrahedron, a phasemeter coupled to each receiver, and calculating means responsive to signals from said phasemeter for determining wind velocity.