SU807044A1 - Apparatus for measuring sprip material web diameter - Google Patents

Description

one

The invention relates to a measurement technique and can be used to measure the diameter of a roll in the papermaking, textile and other industries.

A device for measuring the diameter of a roll of material, comprising tachogenerators on the axes of the roll and the intermediate roller, and the dividing unit 1 are known.

A disadvantage of the known device is the difficulty of operating an analog dividing unit.

The closest in technical essence and the achieved result to the invention is a device for measuring the diameter of a roll of strip material containing a drum designed for winding material onto it, an intermediate roller and tachogenerators mounted on the axes of the drum and the intermediate roller G2.

A disadvantage of the known device is the low accuracy of measurement / due to the fact that the device does not allow measuring the diameter increment for each or several turns.

The purpose of the invention is to show measurement accuracy.

The goal is achieved by the fact that the device is equipped with a speed master, a speed controller, an integrator, a voltage source and an adder, the speed master output is connected to the first inputs of the speed controller and the integrator, the second integrator input is connected to the center of the intermediate roller and the integrator output is connected to the first input of the adder, to the second one, the input of which is connected to a voltage source, the output of the adder is connected to the excitation winding of the tachogenerator installed на on the axis of the drum, the measles of which is connected to the second input 0 of the speed regulator, and the output of the speed regulator is connected to the drum shafts.

The drawing shows a block diagram of the proposed device.

five

Claims (2)

The device for measuring the diameter of the roll contains a drum G intended for winding material on it, an intermediate roller 2, tachogenerators 3 and 4, installed, respectively, 0 on the axis of the drum 1 and an intermediate roller 2, setpoint 5 speed, regulator 6 speed integrator 7 The voltage source 8, the adder 9 and the engine 10. The regulator 6, the engine 10 and the tacho generator 4 form an angular velocity control loop. This pin is adjusted on the side of the exciter winding of the tachogenerator 4. The device works as follows. During the rewinding process, the linear velocity of the material is maintained. constant, i.e. U -const. The signal from setpoint 5 cKopoctH is fed to the first input of integrator 7, to the second input of which a tachogenerator 4 signal arrives. the linear linear velocity of the material, the excitation voltage (Ugg, -) is a constant value when the linear velocity of the material changes, U e, oj6 leads to a change in the number of engine revolutions until the linear velocity is equal to Adannoy master. 1. U.e. Considering that p wo5. - voltage setpoint 5 where and speed, - pressure excitation of tachogenerator 3; - the number of revolutions of drum diameter of the roll; linear velocity, then D U to god Uje const, therefore D UjQjg, where Ug is for example WbB & 7 gDie source 8; integrator voltage 7.. Choosing where p is the diameter of an empty drum, we have Od + d where DO is the increment of the diameter of the roll (S D Ug- Uy, hence, the output voltage of the integrator 7 is proportional to the increment of the diameter of the roll. The device has an additional output that measures the increment roll diameter, which can be used to indicate the thickness of the winding and to control the tension during rewinding depending on the diameter of the roll. The invention: Apparatus for measuring the diameter of a roll of strip material, comprising a drum for winding intermediate material, a roller and tahrgenerators, installed on the axes of the drum and intermediate, differing from the fact that, in order to improve the measurement accuracy, it is equipped with a speed controller, a speed controller, an integrator / voltage source and an adder , the output of the speed setter is connected to the first inputs of the speed controller and the integrator, the second input of the integrator is connected to the core of the tachogenerator installed on the intermediate roller axis, and the output of the integrator is connected to the first input of the adder, to the second input the voltage source is connected, the output of the adder is connected to the excitation winding of the tachogenerator installed on the drum axis, the measles of which is connected to the second input of the speed regulator, and the output of the speed regulator is connected to the drum shaft. Sources of information taken into account during the examination 1. USSR author's certificate 429259, cl. G 01 B 7/12, 1971. 2. Authors certificate of the USSR 323642, cl. G 01 B 7/12, 1970 prototype).