SU1285080A1 - Apparatus for stabilizing the amount of fibre in bin - Google Patents

Abstract

BACKGROUND OF THE INVENTION The invention relates to devices for stabilizing the amount of fiber in a hamper bin. The aim of the invention is to increase the ACCURACY of stabilization by reducing the error from unstable fiber moisture. The output of the adder 5, which is the output of the capacitive sensor for the mass of the fiber in the bunker, is proportional to the mass of the fiber and its humidity. The frequency analyzer 6 divides the signal from the output of the adder 5 in such a way that its low-frequency signal proportional to the fiber moisture passes through the inverter 7 to the first summing input of the adder 8, the second summer input of which comes from the analyzer 6 signal proportional to both the fiber mass and its moisture. Since in the adder 8, the algebraic summation of these signals occurs, the OUTPUT signal of the adder is determined only by the actual amount of fiber in the bin. 1 hp f-ly, 1 IL.

Description

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HsoGpereiine relates to tsc1; -Hi industry industry, namely, devices for stabilizing the amount of fiber in the hopper, mainly carding machine.

The purpose of the invention is to improve the accuracy of stabilization by reducing the error of instability of the moisture content of the fiber.

The drawing shows a block diagram of the device.

The device contains a capacitive fiber mass sensor in a bunker (not shown), made in the form of a set of capacitors (C1, C2 and Sz), each of which is included in the oscillator circuit of its generator I. A fixed-frequency generator 2 is connected to the first inputs of all discriminators 3, the second the inputs of which are connected to the outputs of the corresponding generators 1. The output of each discriminator

3 through an appropriate detector D. is connected to the input of the adder 5, the output of which is the output of a fiber mass sensor in the bin.

The output of the adder 5 is connected to the input of the frequency analyzer 6, the low-frequency output of which through the inverter 7 is connected to one summing input of the adder 8, another summing input is connected to the high-frequency output analyzer a 6. The subtracting input of the adder 8 is connected to the output of the fiber mass setting unit 9 in the hopper, and the output of the adder 8 is connected to the actuator 10 of the actuator 11 for feeding the fiber into the hopper.

The device works as follows.

When the amount of fiber in the bin changes, the capacitance of the fiber mass sensor changes, which leads to a change in the frequency of the generators 1 from the initial value. The discriminator 3 selects the beat frequencies of the oscillators I and 2. The beats are detected on the detectors 4 and stored in the adder 5. The output signal from the adder 5 carries information about the amount of fiber c. bunker and its humidity. The change in the moisture content of the fiber is much slower (tens of minutes, hours) than the change in fiber mass in the bunker (seconds, tens of seconds). Frequency analyzer 6 separates the signal from the output of the adder 5. A digital, characterizing the degree of fiber moisture, through the inverter 7 enters

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The input of the adder 8, to the other input of which, from the output of the analyzer 6, receives a signal that determines both the mass of the fiber and its humidity.

5 A mismatch signal is generated at the output of the adder 8, which is determined by the difference between the specified and the actual number of fibers in the bunker. This misalignment signal affects the actuator 10 of the actuator 1-1, which regulates the fiber feed into the hopper so that this mismatch signal tends to zero.

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Claims (2)

1. A device dp stabilizing the amount of fiber in a bunker, containing a capacitive fiber mass sensor in the bunker, fiber mass regulator in the bunker, output connected to the subtractive input of the adder, the output of which is connected to the input of the actuator actuator of the fiber feeding mechanism into the bunker, characterized in that in order to improve the accuracy of stabilization by reducing the error of moisture instability in. It is equipped with a frequency analyzer and an inverter, the output of the capacitive fiber mass sensor in the bunker is connected to the input of the frequency analyzer, the high-frequency output of which is connected to the first summing input of the adder, and the low-frequency output through the second summing input of the adder. 2. The device according to claim 1, characterized in that the capacitive mass sensor of the entire fiber in the bunker consists of a set of capacitors, one of which is included in the corresponding oscillating circuit, a generator of a fixed frequency, an adder and, according to the number of oscillatory circuits, successively included discriminators and detectors, while the output of each oscillatory circuit is connected with the first input of the corresponding discriminator, the second inputs of all discriminators are connected to the generator output fixed frequencies, and the outputs of the detectors are connected to the corresponding inputs of the adder, the output of which is the output of a capacitive fiber mass sensor in the hopper.