SU566127A1 - Methof of measuring the length of a material being wound onto a drum and apparatus realising the method - Google Patents

Description

(54) METHOD OF MEASURING THE LENGTH OF THE MATERIAL DURING A DRUM AND DEVICE FOR ITS IMPLEMENTATION

The roller does not measure all the material, but only a small part of it.

This method can be implemented using a new design device containing a measuring roller, a pulse sensor of the drum rotation angle, a pulse sensor of the angle of rotation of the measuring roller, a material presence sensor mounted at a fixed distance from the drum axis, a measuring unit whose inputs are connected to the sensor outputs , a computing unit whose inputs are connected to a measuring unit and a material availability sensor, and a recording unit whose input is connected to the output of a computing unit.

The proposed device is characterized in that it is provided with a device for the initial length of the material and a sensor of the outer radius of the roll connected to the inputs of the measuring unit.

In addition, the difference lies in the fact that the measurement unit contains the first resolution scheme, the inputs of which are connected to the sensors of the angle of rotation of the drum and roller, the sensor of the presence of material and the output of the task of the initial length of the material; the second resolution scheme, the first input of which is connected to the sensor of the outer radius. roll, and the output - to the input of the computing unit; and a counter, the first input of which is connected to the output of the first resolution, the second input to the output of the setpoint gauge of the initial material length, and the outputs to the second input of the second resolution scheme. the second input of the computing unit and the input of the setter of the initial length of the material.

The drawing shows a block diagram of a device for measuring the length of a material when it is wound on a drum.

The device includes a sensor 1 of the outer roll radius, a pulse sensor 2 of the angle of rotation of the drum, a sensor 3 of material presence, a measuring roller 4, a pulse. A sensor 5 of the angle of rotation of the measuring roller, a measuring unit 6 associated with all sensors, a unit 7 of the initial material length, connected to unit 6, measurement, computing unit 8, connected to measurement unit 6 and to the material availability sensor 3, and registration unit 9 connected to the output of computing unit 8.

The measurement unit 6 comprises the first resolution circuit 10, the input of which is connected to the outputs of the pulse sensors 2 and 5, the material presence sensor 3 and the unit 7 of the initial material length; second resolution circuit 11, first input

which is connected to the output of the sensor outer radius of the roll, and the output to the input of the computing unit 3; and a counter 12, the inputs of which are connected to the output of the resolution circuit 1O and the setting device 7 of the initial material length, and the outputs to the second input of the resolution circuit 11, the setting unit 7 input of the initial material length and the input of the computing unit 8.

The device works as follows. . zom.

Before winding the next strip or batch of strips in the setting device 7, set the value Q of the length of the material, after winding which the material does not slip on the drum. The value is chosen minimal and so that in the output

(Do + tHj,

whereB is the outer diameter of the drum; t is the material thickness; ID - number.turns of material per baraba

not equivalent to Eg; Kg for any t values

constant and whole.

At the same time, at the outputs of the setting device 7, a code is set corresponding to the number of measuring pulses of the sensor 5 in the length of the material AND + ZQ (2 is the distance from the axis of the sensor 3 to the axis of the drum),

J

Sensor Signal 3, which fixes the front edge of the material, permits the passage of sensor 5 pulses through circuit 10 to counter 12. At the time the codes of counter 12 and setpoint 7 match, the last signal generated by the pulse counter sensor 5, the signal to set counter 12 to the state n and the signal enabling the pulse counting of sensor 2. The first and last of them control the operation of the circuit 10.

The counter 12, counting the pulses of the sensor 2, generates, at the states Wj, ttij ... w, the pulse signals opening the circuit 11. At the same time, the block 8 carries out the memorization and summation of the codes of the sensor 1 corresponding to the values of, ... T radius roll.

The value t., FH, ... w is chosen so that the angular position of the front end of the strip does not coincide with the measurement zone of sensor 1. The higher bits of counter 12 count whole turns of material and. At t M, the number rf is increased by one, and in block 8 a signal is received allowing the calculation of the average radius of a roll of 1Hz by the formula

 +

+ 1,

where K is the number of measurements.

The end of the winding is fixed when the rear end of the band passes the sensor 3, the corresponding signal closes the circuit 10 and allows the calculation to be completed by block 8. It calculates the length of the material in accordance with the formula

, () 2fl7 H - "- bH,

de p is an integer number of coils of the field in

roll;

 - average roll radius; .20

Dy is the diameter of the drum; the number of pulses corresponding to the angular position of the front material code; M- number of pulses corresponding to 25

one turn of the drum P - distance from 3 to the axis

drum;

PQ is the initial length of the material wound on the drum.30. The results of the calculations are fed to lock 9 of the recording.

Claims (3)

1. A method for measuring the length of a material when winding on a drum, which consists in measuring the linear displacement using a measuring roller material, the angular displacement of the drum and calculate the length of the material, characterized in that, in order to increase the measurement accuracy, the initial length of the material is measured with the help of a measuring roller, and in the process of further winding the angular position of the front end of the material wound on the drum is measured The current geometrical dimensions, for example, the outer radius of the coiled winding, are calculated and the length of the mauterial is calculated. As linear ({a function of the initial length of the material is the angular position of the last end of the material and the outer radius and roll. 2. A device for implementing the method according to claim 1, comprising a measuring roller, a pulse drum angle sensor, a pulse angle sensor measuring Qi -. teller roller, the material availability sensor is installed at a fixed distance from the drum axis, the measurement unit, the inputs of which connected 4i to the sensor strokes, JsbiificniirbJrbUbtft CwiXKi inputs of the Kortiporo connected ..) to the outputs of the blocker (r-r (, and sensor the presence of the mahorna;., n blesh registration, the input of the iio / siiUOieH to the output of the computational unit, the tracing unit, PB, with the help of the measurement accuracy, it is (Shabzheno -LannTch chisy length mate} ha; and i i-rj jioua external sensor radius, subappropriately to the inputs of the iomerot block. 3. The device according to Claim 2, about the same day, the unit with the aim of the first resolution scheme, whose inputs are connected to the angle data. rota of the drum and roller, to the gauge of the availability of material and the output of the preset; as per the length of the material; the second cxoNty is the first input of which pi / .n lyuok to the sensor of the outer radius of the roll, and the input to the input of the helix block; The standard input, the first input of which is connected to the output of the first circuit, is resolved, the second input is connected to the output of the setter of the initial section for the material, and the outputs - to the SOIXisfy station, the second one: to the input of the calculator unit and DXoyj of the recruiter unit, and the second unit; Sources in (| x) rmatsni taken into account during the examination: 1. Author's testimony of the USSR № 310104, M. Kp. Q 01 B 7/04, 197О. 2. The patent of Great Britain 1158455, cl, G-1 M, 1969.