Patent ID: 6046679
Filing Date: 2000-04-04
Classification: G01P

Abstract:
Method of using light to indicate at a distance the wind direction and wind velocity and the air pollution level, which makes use of a weather vane, an anemometer and sensors, consisting in the following steps:a) dividing the compass dial into four equal sectors each corresponding to an angle of 90.degree., bisecting lines of which coincide respectively with the cardinal points, respectively, in the clockwise direction, the sectors north west to north east, north east to south east, south east to south west and south west to north west,b) assigning to each sector delimited in the preceding step a) a predetermined color, chosen arbitrarily to form a color code,c) choosing light sources colored according to the color code defined in the preceding step b) in an equal number for each color,d) juxtaposing the colored light sources brought together in the preceding step c), alternating them regularly and respecting the order defined in step a),e) individually connecting each colored light source to an electricity supply of appropriate specification, interposing a selector controlled by the angular displacement of the weather vane in such a manner that only the light sources of the same color corresponding to the sectors defined in step d) are illuminated when the weather vane is orientated in the direction of one of the cardinal points, but are illuminated over only a part of the distance covered by all the juxtaposed colored light sources, when the weather vane forms an angle with the direction of the cardinal point in question, the light indication of the wind direction then being specified by the illumination of the remainder of said distance covered by the light sources of the color corresponding to that assigned to the sector in the direction of which the weather vane is angularly offset in relation to the cardinal point in question, said remainder then being proportional to the value of the angle swept by the weather vane,f) associating with the colored light sources which serve to indicate the wind direction, a series of light sources distributed according to the wind speed, in such a manner that each light source corresponds to one graduation of the wind speed scale,g) individually connecting the light sources intended to indicate the wind force, as defined in step f) above, to an electricity supply of appropriate specification, interposing a selector controlled by the speed of rotation of the anemometer, effecting the illumination of only those light sources corresponding to the graduations of the wind speed scale, andh) utilizing further colored light sources which are actuated separately according to the pollution level measured by dedicated sensors, assigning a separate color to each pollution level.