SU1224559A2 - Arrangement for measuring pipe length - Google Patents

Abstract

The invention relates to a measurement technique and can be used to control products in the areas of sorting and packaging of finished pipe production products and is an improvement of the known device described in a, c, No. 446731. The purpose of the additional invention is to improve the accuracy and reliability of the device. The device contains a sloping rack, roller conveyor subaccesses with rollers, provided with outer turns, a system of basic photosensors placed equally spaced from each other in the roller gaps of the roller table, a system of photosensors installed from the output (along the longitudinal movement of the pipe) of the roller table and a counting unit, which, together with photo sensor systems for coarse and accurate readings, respectively, forms the measuring part of the device. At the exit along the lateral movement of the pipe, the side of the roller table in its inter-roller gaps is fitted with guides representing two-sided metal strips. - To align the pipes along the end, a stop is provided, which is mounted on the rack and is part of its roller conveyor. 4 yl. i (Л § к ND 4 СЛ СП ф

Description

one

The invention relates to a measuring technique, is intended to control products in the areas of sorting and lacquering finished products of pipe production and is an improvement of the known device described in the ed. St. No. 446731.

The purpose of the additional invention is to trap the accuracy and reliability of the device by providing the possibility of using photosensors and guides in its measuring systems, which are protective means.

FIG. 1 shows the device, top view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - counting unit; in fig. 4 shows an interpolation node in a counting unit, an example of execution.

The device for measuring the length of the tubes contains an inclined rack 1, a feed roller table with rollers 2, provided with outer windings 3, a system of 4 basic photosensors (4.1-4.4) placed at equal distances from each other in the inter roller rollers of the roller table, system 5 photo sensors, installed from the output (along the longitudinal movement of the pipe) side of the roller table, and the counting unit 6, which together with the photo sensors 4 and 5 for the coarse and accurate readings, respectively, form the measuring part of the device. At the outlet along the lateral movement of the pipe, the side 7 of the roller table in its inter-roller gaps is provided with guides 7. The stop 8 is intended to align the pipes along the end. According to FIG. 1, it is mounted on the rack 1 and is part of its roller conveyor 9. The guides 7 are a soy metal strip with a two-sided slope fixed, for example, on a rack perpendicular to the longitudinal axis of the feed roller table. The angle oi of the inclination of the plane facing the roller table is determined by the force of the roll of the pipe from the ridge of turns 3, and its interface with the roller table is determined by the condition for placing the highest point of the slope (top C) within roller 2 of the roller table.

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The counting unit .6 contains the trigger 10, the element 11 OR, the element 12 And, the counter 13 pulses, the element 14 OR, the Converter 15 codes,

5 adder 16 and converter 17

codes. The outputs of the system of 5 precise photo counting sensors through the element 11 OR and the element 12 And are connected to the :: even input of the counter 13 pulse 10 ow. The outputs of the system 4 coarse photo sensors are connected via element 14 I1H to the resetting input of the trigger 10. The output of the counter 13 pulses through the converter 17

15 codes are fed to the first input of the combiner 16, the second input of which is connected through a converter of 13 codes to the system outputs of 4 photo sensors. Accuracy of measurement of the system is 5 photo sensors of an exact count. It can be provided by selecting the fl sshag when installing its photosensors, using a scanstor as such a system or by introducing

25 6 interpolation node 18. Node 18 is designed to determine the length t of a section of pipe that protrudes past the last of the sensors covered by the measuring pipe in the system 5 of exact

30 counts, and can be made in the form of a counter 19 connected by one input with a generator of 20 pulses, two registers 21 and 22, whose inputs are connected to the output of counter 19,

and the outputs to the computing node 23, the output of which is the output of the node 18, fed to the adder 16, while the second input of the register 22 is connected to the output of the element 14

d OR, and the second input of the counter 19 through the delay element 24 to the output of the element 11 PfflH.

The device works as follows.

 The pipe, aligned at the end of the support 8, rolls down the inclined rack 1 and is grabbed by the rollers 2 of the roll table. When the tube enters the measurement zone, all photodetectors

 System 5 of the exact reference point Z: are candlesticks and, in its longitudinal-lateral movement, it overlaps only the axes of the basic photosensors of the system 4. With the passage of the front end of the pipe

55 to the zone of accurate measurement. The first photo sensor of system 5 continues to change along the trigger 10 of block 6 and the signal from its output goes to the JC signal.

permits the passage of the counting pulse into counter 13. When successively intersecting the field of view of the photosensors of the accurate counting system 5, the output of element 11 OR impulses appear, the number of which will ultimately be equal to the number of crossed photosensors. When the rear end of the pipe comes out of the field of view of any of the basic photosensors 4.1-4.4, the signal of its illumination throws in block 6 a trigger 10 (through the OR element 14) in the output state, prohibiting the counting of pulses in the meter 13, the exact count information is generated and through the converter 17 enters the adder 16. The signals from the remaining ones that are not present at that moment (the signal of the illumination of the base photo sensor of the system 4) of the other basic photo sensors of the system 4 in the unit position code arrive at the input of the adder 16, forming the value of the base length. The result of the sum is the result of the measurement.

According to the variant with the use of the interpolation node 18, information is additionally generated on the length of the remainder of the EO segment located at the time of the 4 G photosensor system's operation from the rear end of the pipe between the two photosensors of the EXACT COUNTRY system 5. This is done as follows: when each photo sensor in system 5 is triggered, the contents of counter 19 are written to register 22 and, after a delay (delay element 24), it is reset to zero. Counter

19 counts the pulses from the generator

20 pulses continuously.

Thus, in the register 22, the number of pulses η counted by the counter 19 during the time tg of the pipe’s passage through the tube is recorded. Information register 23 is recorded from counter 19 at the instant of the next signal from element 14 OR. This number of pulses corresponds to the time t of passage

a pipe of length P. At the same time, a signal from element 14 OR starts the computational node 23. According to the data entered into the computational node 23 (L, t, t),

the latter calculates the length of the segment f according to the expression

E, .2.-d The result of the calculation of ig is output to the adder 16.

Claims (1)

Invention Formula Device for measuring the length of pipes St. No. 446731, characterized in that, in order to increase accuracy and reliability, the device is equipped with guides made with a two-sided slope, both measuring systems are made on photosensors, the elements of which are located on both sides of the roller table, and the optical axes in each pair are oriented parallel to axis its rollers, with the input along the transverse movement of the pipe side of the roller table elements of the photosensors are located under the plane of the rack, and on the output side of the roller table perpendicular to its axis are installed guides. figl