SU79221A1 - Optical range finder - Google Patents

Description

An optical rangefinder, made in the form of a theodolite and intended for wave survey of the coastal region, is already known.

The design of the known optical range finders does not allow their use for wave tracking from one point.

The invention aims to solve this problem and consists in the fact that the range finder is equipped with a second telescope, which is rotatable around the sighting axis.

FIG. 1 shows schematically the arrangement of the reticle in the range finder; in fig. 2 is a diagram of the installation of a float for wave recording with the proposed range finder.

The range finder is made in the form of a conventional theodolite equipped with two clamps for inserting a second telescope in them, which has a distance meter grid and is rotatable around its sighting axis.

By hovering the grid of the device onto the surface of the sea, one can determine the azimuths of the hair direction and the distance between them by the projections at the observation point on the vertical angle of sight and the distance measuring grid factor.

By rotating the tube around the axis of sight, the grid lines can be aligned with the general direction of the wave crests, which allows all elements of the waves, except the height, to be determined.

For wave recording, a float / is used, having a socket in the center in which a universal joint is placed; A rail 2 is attached to the latter, having divisions from wooden cross-beams located one after the other through 0.20 m. The rail is held in a vertical position by a weight 8 attached to the float. In order to vibrate, in the case of float installation at great depths, the part of the cable on which it stands is supported by a small additional depth float 4.

No. 79221-2 -

Hovering one of the horizontal hairs of the telescope to the middle part of the float and securing the pipe still, you can determine the height of the waves, doing the corresponding readings on the float rail.

Of particular importance for observations is the height of the 1 instrument above sea level. The greater this height, the farther from the coast can be taken the point of observation at sea.

The process of making observations of the waves with an optical rangefinder is as follows.

The range finder is set at the observation point in the same way as the theodolite; after that, they sight them with a range finder at the point of triangulation and do a reading on a horizontal circle. Given the vertical angle of sight, the rangefinder is aimed at the surface of the sea so that the direction of sight of the horizontal hairs corresponds to the direction of wave movement; then, the time of passage of 15–20 consecutive waves through the average hair of the range finder grid is determined by a stopwatch. Selecting a pair of horizontal hairs on the grid, the time is determined by the stopwatch to find a single crest of the wave between the hairs.

The measurement is repeated 5-10 times. Based on this data, the speed of the waves is determined.

By changing the value of the vertical angle, they sight at another point on the surface of the sea and repeat all the above measurements.

The ultimate goal of the office processing of wave observations is to determine the repeatability of all wave elements by their magnitude during the year and to establish the connection between the wave and wind elements.

To determine the distance between the projections of the hairs on the surface of the sea, it is necessary to first calculate the angle between the lines of sight passing through the middle and each of the other horizontal hairs.

Subject invention

An optical rangefinder, made in the form of a theodolite, characterized in that, in order to conduct wave surveys of the coastal region from one point of a stand, it is equipped with a second telescope, made with the possibility of rotation around the sight axis.