SU121569A1 - The method of determining the angle of inclination of the aircraft for the study of the accuracy of the navigation and flight instruments - Google Patents

Description

The subject of the invention is a method for determining the angle of inclination; amolsta for investigating the accuracy of operation of naznachenny and aerobatic instruments by photographing the image of a light source installed on an aircraft with a nose plane from the water surface; The distance of this image in the aerial photograph is relative to the intersection of the coordinate axes:.

Methods are known for determining tilt angles :: amolsta based on and:, Merei 1, and coordinates of aerial photograph points. The disadvantage of these methods is the low quality of night shots, the measurement properties of the image are lowered, and, in addition, the need to determine the coordinates of some points of the terrain obtained in the image, which is suitable for a significant amount of field geodetic works.

In the described method, this disadvantage is eliminated by the fact that the photograph () irusts in a kolnyi nollet with an onboard camera above the surface of the voliioh surface is only a virtual image of the light source, bed, bed; ; Node of the fusel / aircraft head, for which it is not required when processing the aerial view: images were taken using complex measuring instruments, ;; the accuracy of the method is determined by the focal length of the aerial photo:; d: 1 and by the measurement errors of the segments on the image, but the races: then 1; and on the light source image, the coordinates of the aircraft are not slashed.

FIG. Figure 1 shows a diagram explaining the reflection of the light source from the water surface; in fig- 2 - the scheme of the image of the reflection;: o1Ch) and.to-; nick of Light on the film at the horizontal position of the P ssmet; :to; FIG. 3 - the same, with an inclined position of the aircraft.

The method in question is the following. An aerial camera is installed on the plane so that its optical camera is About :::. OQ occupied a fixed position relative to the coordinate axes X, W.: Z of the parasol, and under the fuselage placed the light source 2. Flpii, flying over the calm surface 3 of water, observed a nonsignificant 4 of the light source 2, pa; light 2 to surface 5 and on straight 5, not perpendicular; ; One G: sv :: rhnosti. Right 5 I; 5 l CTC true vertical, and ipendicular to the water surface, which is visible.

The imaginary image 4 is photographed by an aerophotograph.

With sheer on; Optics OO of aerial camera 1 image 6 of light source 2 will be offset by an A in aerial photograph. This mix from the point of intersection of coordinates is caused by the fact that photographing is taken from the aero photographic camera / distance from the light source 2 by distance B.

E :: whether the optical axis 00 is deflected at an angle Y from the true vertical - straight 5, then the imaginary image 4 of the light source 2 will give the image 7 in the picture, displaced from the point of intersection of the coordinates to the distance B, which is in favor of cameras, determine the total angle of inclination of the aerial camera, i.e., the angle of inclination itself; (eta.

PRED MET INITIATED AND

The method for determining tilt angles of an aircraft for investigating the accuracy of navigation and flight instruments, is made by determining what the angles are by photographing a calm water surface of an imaginary image of a light source, located in a night flight ( on the aerial photograph with respect to the intersection of 0; ei i coordinates judge the magnitude of the aircraft inclination angle.

in a calm state of mountains

-us.i