anemometer sensor / wind vane / for ships / ultrasonic
anemometer, wind vane
CV7 is an updated wind sensor based on the CV3F series, already having a world wide distribution. It is light, compact and has a small consumption.
CV7 is designed to fit the specific needs of sailing boats through an easy to use programmable interface.
The sensor can be combined with a P.C., either with normalised NMEA® input equipment or with any specialised equipment having common interface.
In PC mode, this bi-directional sensor can be programmed and configured for: angle correction, smoothing time constants, measurements units and interface formats.
The ultrasonic sound is conveyed by the movement of the wind in which it crosses. The electro-acoustic CV7 transducers communicate between themselves two by two by ultrasonic signals to measure, following the orthogonal axes, the wave transit time differences induced by the air flow.
The measurements are analysed by integrated calculator in order to establish the wind module and its direction in relation to a reference axis.
1. The temperature measurements are used for calibration corrections of the head mast ultrasonic wind sensor.
2. CV7 Transducers communicate between themselves delivering four independent measures while head wind measured vectors are preferably used for calculations.
3. The effect of an inclination of the head mast anemometer is partially corrected due to the shape given by the space.
This method gives a sensibility of 0.12 m/s (0.25 knots), a dynamic of 40 m/s (80 knots) and an excellent linearity.