SU405016A1 - PHOTOELECTRIC DEVICE FOR THE CONTROL OF DIAMETER DIFFUSIONS FROM A TARGETED SIZE - Google Patents

Description

one

The invention relates to the field of measurement technology and is concerned with measuring the deviations of the diameter from a given dimension.

A photoelectric device is known for controlling the deviations of the diameter from a predetermined size, containing successively located ator moving in a direction perpendicular to the direction of propagation of the light beams illuminating the product being controlled. s, photodetector, signal processing unit with a photodetector.

The proposed device differs from the known one in that the scanner is made of vibro-impact, and three photodetectors with different inertia are decorated on its bark.

This allows us to simplify the processing of the signal from the photodetector and improve the measurement accuracy.

On the fit. 1 shows the scheme of the proposed device; in fig. 2 - plots of the diameters of the diameter of the measured product.

The device includes a scanner, a broadband, an opener /, on the bark of which there are three phoT01 receivers 2, 3, 4 with different capacities, circuits 5, 6, 7 converting the darkening impulses into Progressive plots, dividers 10, 9, 11 voltages The measured product is established during the light rays in front of the scanner.

When vibro-shock oscillations of the scanner core are excited over the photosensitive areas of the photo-detectors, the shadow of the measured item runs. As a result, darkening pulses appear in their output circuits, the level of which is determined by the width of the shadow, i.e., the object being measured and the inertia of each photodetector. These pulses are converted by means of schemes 5, 6, 7 constant proportions proportional to their levels, supplied to comparison circuits 8, 9 through dividers 10, 11. In FIG. Figure 2 shows the graphs of the dependence of these stresses on the diameter of the measured product for the first photopulse with the lowest inertia, the second with the middle one and the third with the least inertia.

When the coefficients of the divisors of 10 and 11, respectively, equal to the ratio of the ordinates

and

and

z

2

. and gr-, corresponding to the lower and upper uaj z

mu Limits of the floor tolerances on the diameter of the object being measured. When the measured diameter lies in the start-up field, the voltage between the points of the circuit O and a (see fig. 1) is positive, and between the points a and p a is negative. When the diameter value exceeds the lower granularity, the tolerance field changes the sign of the first one;