METHOD OF DETECTING METAL PARTICLES IN DISPLACED FIBROUS MATERIAL Russian patent published in 2015 - IPC G01N27/00 D06H3/14 

FIELD: textiles, paper.

SUBSTANCE: invention relates to the field of engineering for light industry and can be used to create the systems for detecting metal particles in textile materials, in nonwoven substrate in production of synthetic leather, felt, etc. The method of detecting metal particles in the displaced fibrous material consists in placing the displaced fibrous material in the working area of induced coil of oscillating circuit in which high-frequency oscillations are created using the generator. Further, amplification and detection of high-frequency output voltage of the generator is carried out. At that at the output of the amplifier-detector the impulse of the required duration for reliable operation of the actuating mechanism is formed. The output voltage of the amplifier-detector is compared with driving voltage. The resulting voltage difference is integrated, and the voltage is applied at the output of the integrator to stabilise the amplitude of high-frequency voltage at the generator output, and the integration process is interrupted for the duration of the impulse formed.

EFFECT: increase in reliability of detection of metal particles in the displaced fibre material and providing automatic compensation of external disturbing actions.

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