SU943210A1 - Device for controlling thickness of glass filament - Google Patents

Description

• The invention relates to the production of glass fibers and can be used, in particular, in the automation of control of the process of forming glass fibers of a given thickness.

A device for regulating the thickness of a glass strand containing an electric furnace, a glass thickness sensor and a regulator in the power circuit of an electric furnace £ 1 J.

Closest to the proposed technical essence is a device for controlling the thickness of the glass fiber, containing an electric furnace, a glass thickness sensor, a setter, a regulator, an adder and an actuator included in the heating current control circuit, the glass thickness sensor and a setter being connected to the respective inputs of the controller ^ 2 ], _{2 £)}

The disadvantages of these devices is the low dynamic accuracy of regulation, which characterizes the occurrence of auto-motions caused by the presence of transport lag and non-linearities in the object and in the control device.

The purpose of the invention is to increase the accuracy of regulation.

The goal is achieved in that the device for adjusting the glass fiber thickness containing the electric furnace, the thickness of the glass fiber sensor, dial, knob, an adder and uc ¹⁰ additionally body included in the heating current control circuit, wherein the thickness of the glass fiber probe and dial are connected to respective inputs of a regulator, introduced a delay element ¹⁵ correcting unit and an additional controller, wherein the thickness of the glass fiber probe and dial are connected to respective inputs of an additional controller, the output of which through the f therefore connected delay element and a correction unit connected to the input of the adder, the other input of which is connected to the output D gulya3

Ί'ορ3, · 3 the output of the adder is connected to the executive body.

The drawing shows the proposed device.

The device contains an electric furnace 1, at the output of which, after the thread collector, a thickness gauge 2 is installed, connected through a regulator 3 and an adder 4 to an actuator 5. The input of an additional regulator 6 is connected to a thickness gauge 2, and the input through a delay element 7 and correction unit 8 is connected to 'to the adder 4. The inputs of the regulators 3 ^and 6 are also connected to the setter 9 ·

The device operates as follows.

Glass fiber is formed at the outlet of the electric furnace 1 and rewound using the rewind mechanism to the take-up reel. The thickness gauge of filament 2, installed at the output of the electric furnace 1 after the filament of the collector, continuously monitors the current value of the thickness, and the value of the nominal value of the thickness is set using knob 9. The output signal of controller 3, having passed. adder '(, it goes to the input of the executive body 5 = A correction signal from the correction unit 8 ^! ·. is received at the other input of the adder 4, depending on the type of signal at the output of the additional controller). The value of the correction signal is taken to be somewhat lower than the amplitude of the steady-state oscillations of the output signal of the controller 3. The correction signal is supplied in antiphase to the main signal, i.e. at the moment of increasing the value of the output signal of controller 3, it deducts & P - the value of the correction signal of block 8 is subtracted from it, at the time of decreasing the input signal of controller 3, the signal Δρ is added to it. Thus, the device slows down and self-oscillations are suppressed.

The value of the optimal phase shift is erased by setting the delay element 7. An additional controller is used without a dead zone, and its discrete output signal | l: 0 corresponds to a deviation of the thickness from the set value up or down.

The application of the proposed device · ϊθ va increases the dynamic accuracy of regulation by eliminating self-oscillations of the adjustable parameter, which significantly improves the quality of the glass fiber produced.

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Claims (2)

The invention relates to the production of glass yarn and can be used, in particular, in automating the management of the glass yarn forming process of a given thickness. A device for regulating the thickness of the glass filament is known, which contains an electric furnace, a glass thickness gauge and a regulator in the power supply circuit of the electric furnace 1. The closest to the proposed technical entity is a device for regulating the thickness of glass yarn containing an electric furnace, a glass thickness gauge sensor, a setting device, a regulator, an adder and an actuator included in the heating current control circuit, and the glass thickness sensor and the setting device are connected to the corresponding inputs of the regulator. The disadvantages of these devices are the low dynamic accuracy of the regulation, which is characterized by the occurrence of auto-preferences caused by the presence of a transport delay and nonlinearities in the object and a control device. The purpose of the invention is to increase the regulation accuracy. The goal is achieved by the fact that in a device for regulating the thickness of glass yarn, containing an electric furnace, a glass thickness sensor, a setting device, a regulator, an adder and an actuator included in the heating current control circuit, the sensor of glass thickness and a setting device are connected to the corresponding controller inputs, a delay element, a correction unit, and an additional controller were introduced, the sensor of glass fiber thickness and the setting device being connected to the corresponding inputs of the additional controller, the output of which is through been consistent and connected delay element. the correction unit is connected to the input of the adder, another input of which is connected to the output of regula 3 iopa, and the output of the adder is connected to the executive body. The drawing shows the proposed device. The device contains an electric furnace at the outlet of which a fiberglass sensor 2 is installed after the yarn, connected via regulator 3 and - a k dispenser with an actuator 5 An additional regulator 6 input is connected to a thickness sensor 2 and an input through delay element 7 and correction unit 8 is connected to adder k, the inputs of the regulators 3 and 6 are also connected to the setpoint 9. The device works as follows. Glass fiber is formed at the outlet of Electric Furnace 1 and rewound with the aid of a rewinding mechanism to a take-up reel. Yarn thickness sensor 2 installed at the exit; electric furnace 1 after the yarn collector, carry out continuous monitoring of the current thickness value, and the value of the nominal value of the bulk, iny is set using the setting device 9. The output signal of the regulator 3, pass. adder j, is fed to the input of the is -: i real organ 5 To the other input su, m, -; Ator receives a correction signal from the correction unit 8 (depending on MOCTv: depending on the type of signal at the output of the supplementary / gravity regulator), G; (, -the correcting signal is received by r; a somewhat smaller amplitude of the device SE-1B 11x of output oscillation C has been decelerated by an insulator 3. Correction,: .-: the signal is given in the phase of the base signal, i.e., of torus 3, the DS is subtracted from it — the value of the correction signal of block 8, in As the input signal of regulator 3 decreases, the signal dr is added to it, thus, the device brakes and suppresses self-oscillations. O4 The optimum phase shift is erased by adjusting the delay element 7. The auxiliary controller is used without a dead zone, and its discrete output the signal fl: 0 | j corresponds to the deviation of the thickness from the given value upwards or downwards. The application of the proposed device increases the dynamic accuracy of the regulation by eliminating the self-oscillations of the controlled parameter, which significantly improves the quality of the produced glass fiber. Apparatus of the Invention A device for regulating the thickness of a glass filament comprising an electric furnace, a glass thickness gauge sensor, a setting device, a regulator, an adder and an actuator included in the heating current control circuit, the glass thickness sensor and the setting sensor being connected to the corresponding controller inputs, characterized in that in order to improve the accuracy of the adjustment, a delay element, a correction unit and an additional controller have been introduced into it, the sensor of the glass fiber thickness and the setting device being connected to the corresponding inputs An additional ogulator, the output of which is connected through series-connected delay elements and a correction unit to the input of the adder, the other output of which is connected to the output of the regulator, and the output of the adder is connected to and Sources, information sources received so attention in the examination 1. USSR author's certificate W Szbbz, cl, from 03 to 37/00, .1970. 2. USSR author's certificate for application number 283/8 6 / 23-33, 1979.