A yarn motion state detection method and device thereof

Abstract

A yarn motion state detection method is characterized in that a parallel light area directly produced by a light-emitting unit is provided, a light receiving unit detects the motion state of the yarn in the parallel light area; the yarn is loaded to a spinning machine through the parallel light area; a photosensitive surface relative to the light receiving unit, confirms the lighting intensity variation in the parallel light area caused by the moving yarn in a fixed time interval, and a variable electrical signal is produced based on the lighting intensity variation in the parallel light area; in a fixed time interval, the electrical signal changes relative to the reference signal, to generate an output signal specifying the motion state of the yarn; operating members of the spinning machine receive the output signal and implement the shutdown or normal operation functional instructions. Compared with the existing technology, the invention uses a method of changing the optical signal intensity into electrical signal to achieve the detection of the motion state of the yarn, the detection method makes the circuit structure more simple and the detecting process easier, which not only reduces design costs but also improves the detection efficiency.

Description

technical field [0001] The invention relates to a method for detecting the moving state of yarn and a device applying the method. Background technique [0002] The spinning machine needs to detect the movement state of the yarn during the working process. Once the yarn is detected to stop moving or the yarn is broken, it is necessary to control the main machine to stop in time to prevent holes, broken needles or jumping in the woven fabric due to the broken yarn. Yarn and other defects. [0003] In the prior art, the Chinese invention patent "Method and Device for Determining the State of a Textile Machine by Front Yarn Motion of Optical Sensor" such as the patent No. ZL92104754.1 (notification No. CN1052209C) discloses a method for determining the The method and device for the yarn to be fed into the textile machine to move or stop. This patent adopts the method of placing the measured yarn between the light emitter and the photoelectric sensor, and generates an electrical...

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Problems solved by technology

This patent realizes the detection of the yarn movement state by converting optical signals into electrical signals, which is simpler than the detection method of the previous patent, but in this patent, the light emitting unit and the light receiving unit are located on the same side of the yarn , in order to effectively detect the motion state of the yarn, it is necessary to reasonably set the angle λ between the emitted light and the yarn, the angle β between the received light and the yarn, and the light emission intensity, especially for the design requirements of the angle λ and angle β Higher, which increases the difficulty of design, and the process of debugging the angle during detection is also more troublesome, so further improvement is still needed

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