SU123721A2 - Road profilograph - Google Patents

Description

Road profilographs are known based on determining the magnitude of the instantaneous speed of a wheel running around a road profile and its subsequent decomposition on a course gyroblock in two directions of geographical coordinates. Their disadvantage is that they do not allow to obtain the coordinates of the points of the traversed path.

The proposed device does not have this disadvantage and, in contrast to all existing road profilometers, it allows to obtain true horizontal and true vertical components of the instantaneous speed of the axis of the run-in wheel, which makes it possible to obtain geographical coordinates and exceeding the points of the path traveled.

The main difference of the proposed road profilograph is that a double eccentric axis is used in its running wheel, which, in combination with a helix, provides the components of the instant running speed of the running wheel in the vertical and horizontal directions. The use of an additional integrator to integrate the vertical component of the wheel speed makes it possible to obtain a third coordinate (transient) and thus create a kinematic scheme of a three-dimensional road profilograph, the accuracy of which is higher than that of known devices of this kind.

No. 123721

The kinematic scheme of the automatic three-coordinate road profilograph is shown in the drawing.

The running part of the device consists of the following main parts: running wheel /, gearbox 2 and 7, balancing weight 3, double eccentric axis 4, 19, ti 5, tachogenerator 6, driving frame 8, spring 9, hinges 10, lever mechanism // , sinus-cosine potentiometer 12, current collectors 13, 16, three-degree gyroscope with correcting motors to bring the axis of the gyroscope 14 to the vertical, body / 5 of the chassis, hinge 17, spacer beam 18.

In the working position, the running gear part is fastened to the frame of the movable object with its body 15 (tons of gacha, motor vehicles, etc.). The frame 8 of the device is attached by the hinge 10 to the housing 15 and has a device for rigidly fastening axis 4 therein, on which axis 19 is hingedly mounted, with wheel /, gear 2, 7, tachogenerator 6 and balancing weight 3.

Under the action of the spring 9 fixed in the hinge 17, the frame 8 has the ability, turning in the hinges 10, to press the wheel to the road surface. The line connecting the centers of AB hinges coincides with the direction of the normal to the road surface at the point of contact of the wheel. By means of the pull 5, the direction AB is transmitted to the lever 11, which is also set in the direction normal to the road surface, since the levers AB and SD are opposite sides of the parallelogram. On the lever // coaxially with hinge 10, a sine-cosine -potentiometer 12 is rigidly set, which is also installed along the normal to the ground. at an angle of 90 ° with respect to each other, respectively, in a vertical and horizontal plane.

At the functional potentiometer, a signal is multiplied, which is proportional to the instantaneous speed of the wheel, by the sine and cosine of the angle 1 between the tangent to the road profile and the horizontal plane. The horizontal signal, the component of the instantaneous speed of the axis of the running-in wheel, is fed to the sine-cosine potentiometer 20 of the heading gyro 21. The case of the sine-cosine potentiometer 20 is set strictly in accordance with the wheel rolling plane. The heading gyro itself with a potentiometer can be installed anywhere in the object away from the chassis or on the chassis body 15. On the sine-cosine potentiometer of the heading gyroscope, the horizontal wheel speed signal is multiplied by the sine and cosine of the angle between the tangent to the road profile and the horizontal plane (heading angle), i.e., the components of the true horizontal speed along geographic coordinates are determined. After integrating these components in the integrating unit, the geographic coordinates of the object are obtained, and after integrating the vertical component, the wheel axis velocities by a special additional integrator receive the relative excess of the object over the initial coordinates setting point.

Subject invention

Road profilograph on author. St. No. 120014, characterized by the use of a driving axle with two eccentrics on the traveling wheel for automatic determination of geographic coordinates and elevation of the points traveled.