RU233131U1 - Hanging laser plummet - Google Patents

Abstract

The utility model relates to the field of geodesy, in particular to geodetic accessories, and can be used as a suspended laser plummet for installing a theodolite above a reference point. The technical result from using the utility model consists in simplifying the measurement process. The technical result is achieved in that the suspended laser plummet contains a laser module configured to create a narrow laser beam with radiation in the visible spectrum and a red laser beam, a conical housing with an opening in the narrowed lower part and with a cover in the upper part, in the center of the outer surface of which an eye with a suspension thread is glued, while in the middle of the outer surface of the housing there is a control button connected to the laser module and a place for connecting the battery. 1 Fig.

Description

The utility model relates to the field of geodesy, in particular to geodetic accessories, and can be used as a suspended laser plummet for installing a theodolite over a reference point.

Before carrying out most geodetic works, for example, geodetic layout base, tachymetric survey, the first stage is to install the tachymeter over the reference point. For this, it is necessary to coincide the vertical axis of rotation of the device, for example, the tachymeter, with the reference point with an accuracy of up to 1 mm. Therefore, it is necessary to use a device for centering geodetic instruments over the reference point. The centering device allows you to install a geodetic instrument over reference points. Therefore, the creation of a suspended laser centering device is relevant.

An optical plummet is known (patent No. 145760, published 01.01.1962), containing telescopes and a “cube” prism, distinguished by the fact that for the purpose of centering above and below the point of standing and combining the vertical directions of the sighting axes of the telescopes, two telescopes are used in it, between which a “cube” prism is located, the central part of which is not covered with a reflective material, forming an opening in the reflective layer.

The disadvantage of this device is the difficulty of taking measurements due to the fact that the operator must simultaneously control the coincidence of the vertical axis of the plummet with the reference point and the coincidence of the bubble level with the horizon line, which significantly complicates the measurements.

An adjustable plumb bob is known (patent 2027145, published 01.1995), comprising a massive elongated body with a pointed lower part and a through slot made in the body, a spool with two side cheeks installed in the slot of the body with the ability to rotate around a horizontal axis intersecting the vertical axis of the plumb bob, and a flexible thread attached to the spool, passed through an axial hole in the upper part of the body.

The disadvantage of this device is the difficulty of taking measurements due to the fact that when working near ferromagnetic materials, the plumb line deviates from the vertical due to the action of the magnetic field.

An optical scheme of an optical-laser plummet is known (patent No. 2272250, published on 20.03.2006), taken as a prototype, containing an eyepiece, a grid, an objective, a prism made with the possibility of changing the beam path by 90° and obtaining a direct image in the eyepiece, characterized in that it additionally includes a laser module made with the possibility of creating a narrow laser beam with radiation in the visible region of the spectrum, a beam-splitting unit placed between the objective and the prism, on the dividing face of which an optical coating is applied, made with the possibility of reflecting the light flux of the laser beam and transmitting a visible image into the eyepiece.

The disadvantage of this device is the difficulty of taking measurements. With a beam length of more than a meter, it is poorly visible in daylight. Due to the fact that the lens fogs up in cloudy weather and with temperature changes, it is difficult to conduct tests.

The technical problem solved by the proposed utility model is the creation of a suspended laser plummet.

The technical result of using the utility model is to simplify the measurement process.

The technical result is achieved in that the suspended laser plummet contains a laser module designed with the ability to create a narrow laser beam with radiation in the visible spectrum and a red laser beam, a conical housing with an opening in the narrowed lower part and with a cover in the upper part, in the center of the outer surface of which an eye with a suspension thread is glued, while in the middle of the outer surface of the housing there is a control button connected to the laser module and a place for connecting the battery.

The essence of the utility model is shown in Fig. 1.

The device consists of a cone-shaped body (1). The length of the body (1) is from 4 cm to 15 cm, the diameter is from 1 cm to 3 cm. In the lower narrowed part of the body (1) there is a through hole (2) with a diameter of 2 mm to 5 mm for outputting the laser beam. Any laser module (3) with a length and width of 5 mm to 10 mm and a place (4) for connecting a lithium battery with a capacity of up to 580 mAh are fixed inside the body (1). The cover (5) with a diameter of 1 cm to 3 cm is fixed to the body (1) with any loop (6) with a length of 7 mm to 15 mm and riveted with a rivet (7) placed in the hole (8). The rivet (7) is made of metal, for example, aluminum, with a diameter of 2 to 3 mm, a length of 5 mm to 15 mm. The hole (8) with a diameter of 2 mm to 3 mm. In the center of the outer surface of the cover (5) an eyelet (9) for a suspension thread (10) is glued. The eyelet (9) is up to 10 mm long and up to 5 mm wide. The thread (10) is made of any durable polymer material, for example, nylon. The length of the thread (10) is from 10 cm to 50 cm. In the middle of the outer surface of the case (1) there is a control button (11), connected by a communication line (12) to the laser module (3) and the place (4).

The body (1), cover (5) and eye (9) can be made of any plastic suitable for 3D printing, for example, PET-G plastic.

The device works as follows.

The body (1) with the cover (5), riveted with a rivet (7), placed in the hole (8), and fixed with a loop (6), is suspended by a thread (10), secured to the eye (9), to the hook of the tripod's mounting screw. The control button (11) is pressed, power is supplied via the communication line (12) to the laser module (3) from the battery placed in the place (4). Centering is performed over the reference point using the point of the laser beam of the module (3), directed from the hole (2).

Thus, the useful model of the suspended laser plummet allows to simplify the testing. Due to the fact that the thread is fixed on the cover of the housing, the distance from the ground to the output point will be shorter, therefore, the beam will be less scattered and shine more clearly, which will allow to carry out measurements at any time of the day. Due to the possibility of connecting the battery, the operation of the device will not depend on the theodolite. The conical shape of the housing is least susceptible to the influence of bad weather conditions, such as wind, which ensures continuous operation of the device in any conditions. The control button located on the outer surface of the housing allows you to easily control the device.

Claims (1)

A suspended laser plummet comprising a housing, inside which a laser module is fixed, designed with the possibility of creating a laser beam with radiation in the red region of the electromagnetic spectrum, characterized in that the housing is made cone-shaped with an opening in the narrowed lower part and with a cover in the upper part, while in the center of the outer surface an eye with a suspension thread is glued, while in the middle of the outer surface of the housing there is a control button connected via a communication line to the laser module and a place for connecting the battery.