SU1303812A1 - Method of measuring length of articles moving in longitudinal direction - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure the length of a rental. The purpose of the invention, an increase in the accuracy of length measurement, is achieved by installing sensors along different base distances Eg. Along each line of movement of the product, from each other, taking into account the signals of the length sensors. the base sections completely covered by the product and the time intervals for the front end of the product tS i-ro to pass through the base section adjacent to the sections completely covered by the product. At; - the remainder of the length of the product, Atj. d- additions to the remainder of the product length up to the length of the i-ro base section. The length of the product is calculated by one of the formulas j + 4ut; / tg,). C-; E "2: ESj + ESi - (btg. /T.x fj.). The final result of the calculation is chosen for the smaller value of i t; or tj. . 1 il. I (L

Description

143

The invention relates to a measurement technique and can be used to measure the length of a rental.

The aim of the invention is to improve the measurement accuracy by reducing the error due to a change in the speed of the product during the measurement process.

Pa the drawing presents a diagram explaining the proposed method.

In the example, four different base areas, limited by five sensors 1-5 of the presence of the product 6. Depending on the conditions of use of this invention, their number can be changed. The outputs of the sensors -5 are connected to the corresponding inputs of the computational computing unit 7, the output of which is the output of the device.

The method for measuring the length of moving articles is implemented as follows.

At the moment when the rear end of the product 6 of the sensor 1 passes through, in block 7 a set of completely covered basic sections is fixed (phase

C ,,, J, h,

as well as the interval it, the transit time of the remainder of the product, counted by block 7 from the time the front end of the product 6 passes through the next sensor 3. Then at the time of passing the front sensor 6 of the next sensor 4 (phase II) by the block 7, the length of the next baseline is additionally fixed the section Eg and the intervals tg and Atg of the time for the front end of the product 6 to pass, respectively, of the next base station ES and its remainder (from the moment the rear end of the product 6 leaves the sensor 1 until the front end of the product 6 passes through sensor 4, schtrihovoy line drawing shown in a phase I). Thereafter, in block 7, a comparison is made of the codes of the values of the At values obtained, and ttj, from which a smaller one is selected. Then, for the selected lower value, the product length is calculated using the following algorithms:

for less i t,

V - Tfr. . R

 t.its, b

for less

P rPt + g -

 S ,, ts,

five

eight

five

ABOUT

ABOUT

Oh ,, Q ate

122

The calculated product length and its corresponding value ut, () is stored in block 7,

Similarly, at the moment when the rear end of the product 6 of the next sensor 2 (phase III) passes, block 7 fixes a set of basic sections 21 Pg g completely covered by the product + the time interval ut of the passage of the front end of the product 6 from the moment it passes through the first intermediate sensor 4 until it passes the rear end of product 6 of sensor 2. After that, in block 7, the lowest t (btj) value stored therein is compared with the f, t value just recorded. If ut was less than the ut value stored in block 7, (t§) , then in block 7 produced with Iran has previous information & t | (utf) and the corresponding length) and remembering the new information g, and At. If a

five

the same lit, when comparing with block 7, will be more than the corresponding value of the DC stored in it, (btj), then the value of Atj is canceled, and the information stored in block 7 is saved.

Finally, at the moment when the front end of the product 6 of the last sensor 5 (phase CHA) passes in block 7, the length of the last base section Ef and the intervals C§ and utj of the passage time of the front end of product 6, respectively, of the next base one are recorded; section g and the remainder of the base section uEj (from the moment when the rear end of the product 6 passes through the next sensor 2 until the forward end of the product of the next sensor 5). Thereafter, in block 7, a comparison of the stored value of & t, (A.t§, it) with the newly recorded value of? Tg is made and the lesser value is taken from the two values. In this case, if the stored fit was smaller, (utj,) s, then the corresponding value of the product length t is outputted by block 7 to the output as the final measurement result; if it, or utg, turned out to be smaller, then in block 7, for the smaller of them, the product length is calculated using the algorithms:

for less it.

w b ,,, M

ts.

H

four

for less itg

EI, zEg + es, -.

, i tj

The calculated length of the product is output by block 7 to the output as the final measurement result. This completes the measurement of the product length.

Claims (1)

Invention Formula A method for measuring the length of products moving in the longitudinal direction, which consists in that, in the course of moving the products, sensors of the presence of the product are placed at different base distances Eg. from each other, according to the moments of the ends of the product, areas of the sensors fix the intervals of 20 times for the ends of the product to pass certain areas between the sensors, at the moment when the rear end of the product leaves the zone of the first sensor, fix a set of ZEg- completely 25 basic areas covered by the product and ; t, the passage of the front end of the product from the next sensor, at the time the front end of the product reaches the next sensor code 30, the time interval tj of the front end of the product p is recorded of the base base area, using fixed values of time intervals, calculate the length of an item of 15 units as a sum of a set of 2Г f and a ratio of time intervals, -S, multiplied by the length of the base region j on which these time intervals are measured, the calculated information is memorized, with further product advancement, the operations on determining the sets of base sections completely covered by the product, iy-45 time intervals it, are repeated; and t§. and operations to calculate the length of the product and g 5 0 5 0 5 0 5 storing the calculated information in the memory, at the moment when the front end of the product reaches the last sensor, select the final result of the product length measurement, characterized in that, in order to improve the measurement accuracy, the time interval utj from the moment the rear end of the product leaves the zone of the first sensor to the moment when the front end of the product reaches the zone of the next sensor, a smaller value is determined from the two measured time intervals At, and i.tg, and the corresponding calculated length is recorded. If a smaller time interval value is selected and selected, when utj is selected, a smaller length of the product is calculated as the sum of a set of 8j base sections completely covered by the product and the length of the base section in which the time intervals are measured .t,, utj and t§, minus ratio, multiplied by the length of the section in which these time intervals are measured, at each input of the rear end of the product from the zone of the next sensor and each time the front end of the product reaches the next sensor, the corresponding time intervals At are recorded ;, itj; and tg. compare as they arrive, time intervals ut; and tj. with the time interval stored in memory, the smallest value is selected from them and stored in it and the corresponding value of the calculated length; the final result of the product length measurement is selected by the smallest value & tg measured at the last baseline and the time interval stored in memory after the previous similar comparison. Phase I Phase II Phase III fcfza / V Compiled by L.Kryukova Editor M.Kelemesh Tehred N.Glushchenko Proofreader A.Zimokosov Order 1295/39 Circulation 6781 Signed VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. D. 4/5 Production and printing company, Uzhgorod, Project 4 street. ffir / xffi