A loom weft detecting sensor system and its control method

Abstract

The invention discloses a loom weft detection sensing system and a control method thereof. The loom weft detection sensing system comprises a photoelectric sensor, an amplification and rectification module and a central processing unit. The central processing unit is connected with a sensitivity data storage module, a weft selection controller, a drive module, a display module and a loom mainboard. The weft selection controller controls multiple weft accumulators, the weft accumulators are located at the corresponding fabric width head end of a loom, and the photoelectric sensor is arranged at the corresponding fabric width tail of the loom. Corresponding sensitivity data are called according to the different weft accumulators, the amplification factor is adjusted through the amplification and rectification module according to the sensitivity data, when weft is thick, sensitivity is automatically reduced, when the weft is thin, sensitivity is automatically improved, the spun yarn empty stop phenomenon and the thick yarn short weft non-stop phenomenon are greatly reduced, consumption of manpower and material resources is reduced, and production cost is reduced.

Description

technical field [0001] The invention relates to textile machinery, in particular to a weft detecting sensor system for a loom. Background technique [0002] Commonly used looms are generally water-jet looms or air-jet looms. The weaving process of the loom usually includes steps such as shedding, weft insertion, weft beating, coiling, and let-off. The weft device is introduced into the shed formed by the opening of the warp yarns, so that the warp and weft are interwoven to form a fabric. Taking the water-jet loom as an example, the weft insertion method is to use water as the weft insertion medium to generate frictional traction on the weft yarn through the jet of water, and then introduce the weft yarn into the shed. In this process, in order to judge the state of weft insertion, it is necessary to use the weft detecting sensor to detect. [0003] The weft detection sensor is usually a photoelectric sensor, which can be in the form of direct beam or reflection, but no ma...

AI Technical Summary

Problems solved by technology

In order to take into account the sensitivity of coarse and spun yarns, it can only be adjusted to the middle position. Doing so will easily cause the sensitivity of roving to be taken care of, but not the sensitivity of spun yarn.

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