SU1409861A1 - Device for measuring contour of object cross-section - Google Patents

Abstract

The invention allows controlling the cross section contour of a part of a complex profile. The aim of the invention is to improve the measurement accuracy by increasing the brightness of the light section of the controlled contour on the screen. A light section is designed on the surface of the object to be monitored with the power of four lighting channels evenly spaced around the controlled section. The image of a controlled light section is designed with the help of a lens onto a screen through a mirror system, which allows the viewing angle of the light section to be changed. The mirrors of the mirror system are installed with the possibility of changing their spatial position, which makes it possible to combine different parts of the light section into a single contour on the screen. The mirror system is made in the form of four pairs of mirrors, one of which is in each step-. re installed before the receiving lens, and the other after it, parallel to its optical axis. i (L

Description

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The invention relates to a measuring technique and can be used: to control the contours of the cross sections of the parts in the machine and instrument: structure.

A: The purpose of the invention is to increase the measurement accuracy by increasing the brightness of the light section of the controlled contour on the screen. : Figure 1 shows the principal | on the device diagram; Fig. 2 illustrates the embodiment of the implementation of the mirror system I of the device and the receiving lens. I The device contains four light channels (two are shown), each of which includes a light source 1, a condenser 7., a slit diaphragm I-3 and a lens 4, a mirror system 5, a receiving lens 6 of the projection channel and a screen 7, a fifth light source 8 with a condenser (FIG. 2), a transparent stencil 9 and a second projection lens 10.

I Figure 2 shows the implementation of a receptive lens from separate lenses, each of which is optically coupled with one of the lighting channels. The execution of the receiving channel according to FIG. 2 provides a direct image of the controlled section of the object.

Optical axis. Four illuminator;. channels lie in the same plane. I Option to build a mirror system; The themes shown in Fig. 1 contain four lars of mirrors (two I pairs of mirrors are shown, two others are arranged similarly to those shown in the drawing and installed in a plane perpendicular to the drawing-). The construction variant shown in FIG. 2 contains four mirrors (two of them are shown, the other two are arranged in a manner similar to that shown in a plane perpendicular to the drawing)

Mirrors of the mirror system are installed with the possibility of spatial movement parallel to themselves along the normal to their surface.

The drawings also indicate: the angle of inclination of the direction of observation to the optimal axis of the lighting channel; J is the angle of inclination between the optical axis of the receiving lens and the direction of observation of the controlled light section of the object at its input.

The device works as follows.

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50

50

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about

five

The light source 1 in each of the four lighting channels with the help of condenser 2 illuminates the slit diaphragm 3, the Image of which is designed with the lens 4 onto the object under control 11. As a result of the operation of all four lighting channels, a light section is formed on the surface of the object under test.

The receiving lens 6 projects an image of the monitored light section onto the screen 7 through the mirror system 5, which allows the viewing angle of the light section to vary, and also ensures that different sections of the light section combine into a single contour on the screen 7 by changing the spatial position of the mirror.

Screen 7 is also designed with a sample contour of the controlled cross section applied on a transparent stencil 9 (FIG. 2) with the help of a projection lens 10, with which the measured light cross section of the object under test is compared.

Claims (3)

1. A device for measuring a cross section of an object, which is installed uniformly around a monitored object and designed to project a light section of a chain of lighting channels, each of which includes a radiation source, a condenser, a slit aperture, and a lens that make up the first projection channel, receiving lens, and a screen mounted parallel to the main plane of the lens and the optical axis of the lighting channels, and forming the second projection channel, the fifth light source , a transparent stencil with an exemplary profile of a controlled cross section applied to it and a projection lens installed so that its optical axis is perpendicular to the screen, characterized in that, in order to improve accuracy, it is equipped with a mirror system designed to observe a controlled light section on the object under acute angle and made of mirrors located in the receiving channel and installed with the possibility of their linear movement along the normals to them. 2. The device according to claim 1, wherein the mirror system is made up of four pairs of mirrors, each of the pair of mirrors is connected to one of the lighting channels, and the mirrors of each pair are parallel to each other on opposite sides of the receiving lens. 3. The device according to claim 1, about tl and - .4..a .to and so that the mirror The system is made of four mirrors located between the screen and the receiving lens, each of the mirrors is optically coupled to one of the lighting channels, and the receiving lens is made of a set of lenses that are offset from the center of the screen along the respective axes of the lighting channel. FIG. //