SU977945A1 - Method of measuring linear dimensions o glass pipe - Google Patents

Description

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o The invention relates to measurement technology and npeflHaoHaHeHq in particular, for use in devices for optical non-contact measurement of the thickness of glass tubes, used electronic products.

An optical method is known for measuring linear dimensions of plastic products, for example, for measuring the thickness of a plate made of a transparent material, which consists in passing a beam of rays through a plate and measuring its displacement, judging the thickness of the plate, and passing a beam of radiation through the plate with the help of mirrors C13.

This method requires a rather complicated optical system for its implementation.

There is also known a method for measuring the thickness of a transparent film coating, which consists in installing a dual microscope based on the light section method on a controlled product, and sharpening the line of reflection of light from the surfaces of the coating, interlocking two curtains behind the lines with two sliding curtains. reflection of light, a calibrated stream of light is passed through the gap formed between the curtains and, judging from the current change in the measuring device of the micromass, the measured thickness 23 is judged.

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The method requires for each measurement to install manually or mechanically sliding shutters and a swiveling mirror, which eliminates the automation of the intent process.

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Furthermore, the method can only be applied to measure very small thicknesses on the order of a few micrometers.

Closest to the proposed technical essence is the way

Claims (3)

20, a measurement of the linear dimensions of the glass tube, comprising directing a parallel light beam to the tube, produces an image on the screen. formed by the light beam according to which the measured size is judged. A parallel light beam is directed perpendicularly to the axis of the glass tube, then an additional parallel light beam is directed towards the main one, and measured along the image formed by rays reflected from the outer surface of the tube and refracted in the NW tube. However, the image obtained by this method does not have clear boundaries, 4to, in turn, leads to a decrease in measurement accuracy. The purpose of the invention is to increase the accuracy of measurement. Delivered delta is achieved by measuring the linear dimensions of a glass tube, for example, wall thickness. , directing a parallel beam: a light beam onto a tube; an image is formed on the screen, formed by a beam of light, from which the measured size is judged; a light beam reflected from the outer surface of the tube is shielded; It sends only the light: a beam reflected from the inner surface of the tube,:, r. 1 is a schematic diagram of a device that implements the method of measuring the linear dimensions of the glass tube; in fig. 2 - field of view of the screen of the raika screen. The device contains a source of 1 parallel light, a flap 2, a beam of light 3 and a photodetector 4 with a screen 5 The method is carried out as follows. A glass tube 6 is placed in the guide device (not shown) and illuminated with a parallel beam of light from a source 1 of a parallel light beam at an angle of 45 to the generator tube 6. The valve 2 installs the perpendyc le of the axis of the glass tube 6 b in the middle of the illuminated area, due to which the light beam reflected from the inner surface of the tube 6, proportional to the wall thickness of the tube 6, is directed to the screen 5 of the photodetector 4. On the screen 5 of the photo light 4, there is a wide band with clear boundaries Torah determined thickness glass trubki.6, vyuokuyu proposed method provides measuring accuracy. Claims The method of measuring the linear dimensions of a glass tube, for example, the wall thickness, when Eochakshchy directs a parallel light beam onto the tube, receives on the screen an image formed by a light beam, which is measured by that, in order to measure accuracy, the reflected BT is shielded to the outer surface of the tube of the Q beam and the light beam reflected from the inner surface of the tube is directed onto the screen. Sources of information taken into account during the examination 1. USSR author's certificate No. 252624, cl. Ci 01 B 11/06, 1967. 2. USSR author's certificate number 4282O1, lCL. Q 01 B 11 / O6, 1972. 3. USSR author's certificate NO 610641, cl. G 01 B 11/08, 1974. (prototype).