SU1551972A2 - Device for measuring linear dimensions - Google Patents

Abstract

The invention relates to a measurement technique and can be used to automatically control and sort products by linear dimensions in mass production. The aim of the invention is to improve the measurement accuracy. The controlled products are alternately fed to measurement positions equipped with transformer sensors 1. Signals from sensors 1 are fed through switch 2 and the first detector 4 to the first input of subtraction unit 5, to the other input of which the second generator 6 receives rectified voltage of generator 3. From the output The block 5 subtracts the signal to the amplitude analyzer 7. Turning off the shape of the product being monitored causes the amplitude analyzer 7 channels to operate alternately. In this case, the signals from the stabilizers 11 of the level of the previous channels through the diodes 14 are fed to the inputs of the integrating units 12 of the following channels of the amplitude analyzer 7. The duration of the signal at the input of the corresponding integrator unit 12 corresponds to the residence time of the deviation of the shape of the test item above a predetermined level. From the output of the integrating unit 12, the signal goes to the corresponding threshold element 13 and when the specified threshold is exceeded, one of the inputs AND of the block 9 of the three-input elements I. The other inputs of the elements And receive signals from the outputs of the synchronizer 8 and the threshold element 10. From the outputs of the block 9, the signal goes on the sorting device. When the threshold elements 13 of the two adjacent channels are triggered, the signal to block 9 comes only from the previous (lower) channel, the signal of the next (upper) adjacent channel is blocked by the triode 15. 1 sludge.

Description

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The following channels of the analyzer are 7 amplitudes. The duration of the signal at the input of the corresponding integrator unit 12 corresponds to the residence time of the deviation of the shape of the test item above a predetermined level. From the output of the integrating unit 12, the signal goes to the corresponding threshold element 13 and, when the predetermined threshold is exceeded, to one of the inputs of the AND element of block 9 three-way 724

input elements I. The other inputs of the elements And receive signals from the outputs of the synchronizer 8 and the threshold element 10. From the outputs of block 9, signal i arrives at the sorting device. When the threshold elements 13 of the two adjacent channels are triggered, the signal to block 9 comes only from the previous (lower) channel, the signal of the next (upper) adjacent channel is blocked by the triode 15. 1 Il.

The invention relates to measurement technology, can be used to automatically control and sort products by linear dimensions in mass production and is an improvement of the invention according to author. No. 1366868.

The purpose of the invention is to improve the measurement accuracy by obtaining an integral assessment of the deviations of the shape of the products being monitored during the measurement process.

The drawing shows the block diagram of the device.

The device contains a series of differential transformer sensors 1 according to the number of measurement channels (in this example, six sensors), whose inputs are connected via switch 2c by generator 3, connected to outputs via switch 2 and first detector 4, the first input of subtractor 5. The second input of the subtraction unit 5 is connected via the second detector 6 to the output of the generator 3, To the output of the subtraction unit 5, the input of the amplitude analyzer 7 is connected, consisting of a number of threshold elements (not shown) tuned to the size limits of the sorting groups. In this example, the sorting is carried out in five size groups, and the amplitude analyzer 7 has five output channels respectively. The device also contains a synchronizer 8 associated with the control output of the switch 2, and a block 9 of three-input elements And, the first inputs of which are connected to the output of the synchronizer 8, the second - with the outputs of the analyzer 7 amplitude, and the third - the output of the threshold element 10, whose input connected to the output of the first detector 4.

The device also contains amplitudes 7 connected between the outputs of the analyzer and the second inputs of a block 9 of three-input elements And 11 levels of series-connected stabilizers, integrating blocks 12 and threshold elements 13. These blocks are included in the circuits of the first three channels of the analyzer 7 amplitude, because of the product specifications the sorting into these three dimensional groups should take into account the deviations of the shape of the controlled product.

In addition, the device contains diodes 14 and transistors 15. Through diodes 14, the outputs of the corresponding stabilizers 11 levels of the previous channel of the analyzer 7 amplitude are connected to the inputs of the integrating blocks 12 of the next level. The output of the corresponding threshold element of the previous channel of the analyzer 7 amplitude is connected to the base of each of the transistors 15, and the output of the threshold element 13 of the next channel is connected to the collector.

The device works as follows.

The monitored products are alternately fed by an automatic transport device (not shown) on the measurement position, equipped with transformer sensors J, 15, the product rotates around its axis, interacting with the measuring rod of the transformer sensor 1. Signals from transformer sensors that are proportional to the size being monitored are fed through the switch 2 and the first detector 4 to the first input of the subtraction unit 5, to the second input of which through the second detector 6

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the rectified voltage of the generator 3 is applied. The signal from the output of the subtraction unit 5 is fed to the input of the amplitude analyzer 7. Depending on the magnitude of this signal, proportional to the size being monitored, the corresponding threshold element of the analyzer 7 amplitude is triggered. The signals from the outputs of the analyzer 7 amplitude are transmitted to the inputs of the block 9 of the three-input elements AND, which also receive pulses from the synchronizer 8 and the signal of the product from the output of the threshold element 10. The signals from the outputs of the two upper channels of the analyzer 7 amplitude are transmitted directly to the inputs the corresponding elements of And block 9, since the sorting into these two dimensional groups is carried out according to the largest size, without taking into account the deviations of the form. The output signals of the first three channels of the amplitude analyzer 7 are pre-fed to the inputs of the corresponding level stabilizers 11. After stabilization, these signals arrive at the inputs of the integrating units 12, the voltage at the output of which is proportional to the duration of the signal at their input.

Due to the fact that the monitored product vraps around its axis during the measurement, deviations of the shape of the measured size cause changes in the output signals of the transformer sensors 1 coming through the switch 2, the first detector 4 and the subtraction unit 5 to the input of the analyzer 7 amplitudes. A change in the magnitude of the output signal during the measurement process can cause the alternate triggering of different threshold elements of the amplitude analyzer 7. At the same time, the signals of the previous channels of the amplitude analyzer 7, which arrive at individual moments of the measurement process at the inputs of the integrating units 12, are added to the signals of the subsequent channels, since the output of the level stabilizer 11 of the previous channel of the analyzer 7 is connected — through the corresponding diode 14 to the input of the integrated unit 12 of the next channel of the analyzer 7. Consequently, the duration of the signal coming from the amplitude analyzer 1, after stabilization on, the input of each integrated unit 12 will be determined by oscillations contact

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roll size during measurement.

In accordance with the technical conditions, a product can be assigned to one of the dimensional sorting groups, for example, the Flange height only if the shape deviations beyond the boundaries of this sorting group do not exceed one third of the test surface, which corresponds to the angle rotation of the product around its axis by 12 (g). Since the speed of the product's variation is constant, then the time of its rotation at a given angle, which determines the permissible deviations of the shape, will also be constant. Thus, the signal value The output of each integrating unit 12, proportional to the time the signal is present at its input, will be determined by the deviations of the shape of the measured size. Signals from the integrating units 12 are fed to the inputs of threshold elements 13 adjusted for the signal size determined by the permissible signal duration at the corresponding output the amplitude analyzer 7. When one of the threshold elements 13 is triggered, the signal from the output of this element is fed to the input of the corresponding element AND block 9. In the case of simultaneous operation of the pores The final elements 13 of the two channels to the inputs of the block 9 of the three-input elements And only the signal from the output of the threshold element 13 of a lower level is supplied. This is achieved by connecting transistors 15, to the base of each of which the output of threshold element 13 of the previous channel is connected, and to the collector - output of threshold element 13 of the next channel.

Claims (1)

The signals from the outputs of block 9 of three-input elements And go to a sorting device (not shown), which performs automatic sorting of products into appropriate size groups. In addition, the measurement results from the outputs of the 9-unit And elements are transmitted to the digital display device and to the input of the electronic information processing device (not shown). Device for measuring linear dimensions, according to ed.S.N. 1366868, t - I l i ch ay IF, in order to improve the measurement accuracy, it is equipped with n additional channels, each of which is connected between the corresponding output of the amplitude analyzer and the second input of the corresponding element AND of the block of three input elements And, and is made in the form of connected level stabilizer that integrates Editor L. Zaitseva Compiled by Yu. Petrakovsky Tehred A. KravchukCorrector E.Lonchakova Order 320 Circulation 498 VNII11I State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 unit and threshold element, diodes, each of which is connected between the outputs of the level stabilizers, 1st and i + lth additional channels, triodes, the base of each of which is connected to the output of the threshold element of the 1st additional channel, and the collector - to the output threshold element (iH) -ro additional channel, where i - l- (nl). Subscription