SU1392373A1 - Device for measuring inclination angle - Google Patents

Abstract

The invention relates to geodetic instrumentation, in particular to devices for controlling the position of the surface relative to the horizon. The purpose of the invention is to increase the sensitivity of the device. The vessel is made in the form of two rigidly connected parallelepipeds perpendicular to one another with inlet and outlet windows. The beam of rays from the radiation source 10, carrying information about the image of the projection mark 9, repeatedly passes through a layer of liquid 6, which takes a wedge shape when the device is tilted. The electrical signal produced in the photoelectric path is proportional to the displacement of the image of the projection brand. A flat reflectors 7 are placed over the non-specular vessel surfaces. The image of the mark 9 is formed in the focal plane of the objective 8, combined with the analyzer 11 image field, 2 Il. (L

Description

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one

(Reg. 1

The invention relates to geodetic instrumentation, in particular to devices for monitoring the position of the surface relative to the horizon.

The purpose of the invention is to increase the sensitivity of the device.

FIG. 1 shows the proposed device; in fig. 2 shows section A-A in FIG. one.

The device comprises a parallelepiped-shaped glass ampoule made, for example, of four rectangular prisms 1 rigidly fixed between two plane-parallel plates: surface 2 and surface 3, for example, by sintering. In this case, the prisms are arranged so that, with their side polished edges, they form, together with the surfaces, two mutually perpendicular channels, bounded along the X and Y axes by the end plates 4 and the plate 5 with a capillary. These communicating channels are partially filled with a thin fluid 6 (for example, dehydrated ethyl alcohol with a refractive index of 1.3617 at c), so much so that when nak: ampoule at an angle of ± Ti in the specified measurement range and the reverse of the device does not expose the base .

The inner surfaces are mirrored, except for the areas over which the flat reflectors 7 are located, installed between the ampoule and the lenses 8. Each pair of radiating and receiving lenses are installed coaxially along the beam and symmetrically the ampulla on π and the axially parallel surfaces along the axes X and Y in two mutually perpendicular Rny measurement planes.

Each object pair is an optical-electronic (or visual optical) measurement system. In the focal plane of the radiating lens, there is a projection mark 9 with a transparent slit, illuminated by a radiation source, for example, an LED emitting, in the case of a visual optical system, measuring the energy of the visible spectrum.

In the focal plane of the receiving lens, a photoelectric converter 11 is installed, for example, a photodiode or a charge coupled device (PSL array) 5 acting as field image analyzers.

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The device works as follows.

In the absence of slope (), T.e. in the zero position of the device, the reflecting surfaces. located at a distance h parallel to the liquid surface. In this case, the collimated beam of diameter F, formed by the lens and the projection mark 9 carrying information about the image, passes in the direction of the flat reflector 7. After reflection, the rays pass on a slope exceeding at least four times (o (j, j " a) angular measuring range, through the transparent area Q of the cover 3 and the plane-parallel layer of liquid 6 to the mirror surface of the base 2. Having endured at the length L t the mirror sections of the surfaces And reflections and (W + r) passes through the wedge with refraction After the reflection by the second opposite reflector 7, the rays are at an angle o (the output comes from the objective 8 into the objective 8, in the focal plane of which combined with the photoelectric converter 11 - a field analyzer images form the image of the projection mark 9.

In this case, an electric signal will be generated in the photoelectric converter circuit, which is proportional to the zero position of the level, indicating that there is no tilt.

When the device is tilted, for example, in the yz plane at an angle, a layer of liquid will take in the directions of the measurement plane a wedge shape with an apex angle formed by the surface of the liquid and the bottom of the vessel.

A collimated beam of rays, having undergone AND reflections and passed, respectively (N + I) times the liquid wedge, will receive the total angular deviation f of its original direction, the value of which is determined from the expression

yo (oh vih (K + 1) ().

In this case, an electrical signal will be generated in the circuit of the photoelectric path, proportional to the magnitude of the image displacement

U2.2

Compiled by E. Bibikova Editor A. Revin Tekhred And, Veres Corrector S. Cherni

Order 1882/44 Circulation 680. Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Claims (1)

¹⁵ claims A device for measuring the angle to the junction, and a measuring unit with a radiation source located below the liquid level and an analyzer, 'characterized in that, in order to increase sensitivity, the vessel is made in the form of two rigidly connected parallelepipeds located perpendicular to each other with an additional input and two exit windows, the surface of the vessel opposite the base is mirrored, the measuring unit of each of the parallelepipeds is made in the form of sequentially located after the radiation source Before the entrance window of the projection mark and the flat reflector and subsequently clone, comprising a vessel with an inlet window and a mirror base, a partially filled clear fluid downstream of the exit window in front of the analyzer 2Q planar reflector and the lens.