Wind Monitor | Microcom Design

WIND MONITOR

P/N 05103

The Wind Monitor, wind speed/wind direction sensor is both simple and lightweight. Corrosion resistant construction, and the elimination of slip rings and brushes combine to make a reliable wind sensor. The wind speed sensor is a helicoid shape propeller molded of polypropylene plastic. The four-blade propeller is 18 cm diameter x 30 cm pitch with a distance constant of 2.7 meters or 8.8 feet. Threshold of the propeller is 1 m/sec. Propeller rotation produces an AC sine wave voltage signal with frequency directly proportional to wind speed. The AC voltage signal is induced in a centrally mounted coil located on the non-rotating portion of the main mounting assembly, eliminating the need for slip rings and brushes. The vane assembly has a threshold below 1.3 m/s with a damping ratio of 0.25. Vane position is transmitted through a coupling to a precision conductive plastic potentiometer located in sealed chamber in the center of the main housing. The potentiometer requires a regulated excitation voltage, which outputs an analog voltage directly proportional to azimuth angle. All transducer leads terminate in a junction box on the mounting post, making sensor cable connections easy and convenient. Four conductors are required. The tail assembly is thermo-formed of rigid U.V. stabilized plastic, and the main housing assembly and other internal parts are injection-molded. Propeller shaft bearings and vertical shaft bearings are sealed stainless steel precision-grade ball bearings, which further contribute to the sensors’ ruggedness.