SU145014A1 - Stereocomparator - Google Patents

Description

Two- and three-stereo stereocomparators are known for measuring photographs with automatic recording of measurement results. The three-cage stereocomparator, which has a higher accuracy and productivity than the two-cage one, is difficult to manufacture and has large dimensions and weight.

The proposed single quail stereocomparator, while retaining the advantages of a three-cage stereocomparator, does not have its inherent drawbacks. In terms of its design, it is also easier for a two-cell comparator.

To simplify the design, reduce the size and weight of the proposed comparator, one carriage and one prefix are used. Stereoscopic sighting is carried out by simultaneous observation of the aerial photograph and photo lab with the stamp depicted in the photograph recorded during the manufacturing process of the photo lab.

FIG. 1 shows a diagram of an apparatus for manufacturing photo labs; in fig. 2 - stereocomparator; in fig. 3 - recording device.

The basis of the stereocomparator device and the method of measurements on it is the use of single images and photo galleries of points chosen for building the network. The combination of a single snapshot and photo labs allows for stereoscopic viewing and highly accurate identification of connecting and other points in the network.

A stereocomparator kit consists of an instrument for manufacturing photo cameras and the stereocomparator itself.

The device for making photo cameras includes a lamp /, a glass plate 2, a lens 3, a prism 4, a mark 5, an eye 6, a shutter 7, an applied frame 8 and a film cartridge 9. The plate is on a carriage that moves in its plane along the axes l: and g /. Diagonal face of the prism silver plated by 50%. In the center of the applied frame is a stamp. Thus, this device represents

No. 145014- 2 is the combination of a microscope with a camera, the axes of which are aligned.

To make photo galleries, a picture is placed on a plate, in the course, a microscope is pointed at selected points of the picture and photographed. The photo dataset includes the point number and the number of the image for which it was obtained. The stereocomparator consists of the following main parts: a base, a carriage with a snapshot holder 10, a microscope, an attachment 2, an automatic recording device and a light source 13. The carriage moves in its plane along the axes of the henna. The microscope and the attachment are used for stereoscopic observation of the image and photo labs, as well as for identification of selected points in the image. Moving the image along the axes l: and y measures the electronic counter 14 of the automatic recording unit. This measurement is performed using a raster scale 15 attached to the carriage that carries the image. The light from the lamp 16, mounted in the base of the device, passes through the transparent raster intervals and falls onto the photocell 17. Under the action of light, current pulses arise, which, after amplification, fall on an electronic counter 14. Pribof has two counters. The meter readings arrive in the form of pulses on a perforator 18, which breaks the measurement results on punched tape or punched cards. As a perforator, conventional devices are used when using a scraper. Stereocomparator. Works as follows. The picture is installed on the carriage of the device so that its axis of coordinates y is approximately parallel to the axis of the device. In the field of view of the prefix, a photo dataset of the point whose coordinates are to be measured is entered. The microscope points to the point of the image. Here, the picture and outline are viewed stereoscopically. Then, a recording device is switched on which pierces the measurement results on punched tape or punched cards. Similarly, the coordinates of other points of the first and subsequent images of a route or several routes are measured. At the same time, the microscope is also aimed at the coordinate marks of the images, which determine the initial readings.

The results of measuring images recorded on punched tape or punched cards are used to calculate the geodetic coordinates of terrain points or other objects depicted on the images on the electronic calculating mask. By using the stated method you can process both regular images and images obtained from artificial satellites of the Earth or from space ships.

In conclusion, the Central Research Institute of Geodesy, Aerial Survey and Cartography notes the novelty of the proposal and its possible use in cases where the dimensions and weight of the device are of decisive importance.

Subject invention

Stereocomparator for measurements, aerial photographs containing a movable carriage for aerial photographs, equipped with raster scales of photocells, electronic counters and a perforator, as well as an attachment for a photoplant, characterized in that, in order to simplify the design of the stereo comparator and reduce its dimensions, it uses one movable carriage and one prefix intended for stereoscopic sighting by simultaneous observation of an aerial photograph and a photo factory with the mark depicted on it fixed in the process of production tovleni fotoabrisa.

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