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Weaving machine including optical device for monitoring wear of gripper belt and control method of weaving machine

A technology of grippers and looms, applied to measuring devices, looms, and material analysis through optical means, which can solve problems such as economic losses, damage to the same parts, and waste of resources

Pending Publication Date: 2020-12-18
ITEMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, premature replacement of gripper belts obviously leads to waste of resources and economic loss, while prolonged use of excessively worn gripper belts brings a serious risk of failure of the gripper belts, which may damage the textiles being processed and Same part of the loom causing damage

Method used

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  • Weaving machine including optical device for monitoring wear of gripper belt and control method of weaving machine
  • Weaving machine including optical device for monitoring wear of gripper belt and control method of weaving machine
  • Weaving machine including optical device for monitoring wear of gripper belt and control method of weaving machine

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Experimental program
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Embodiment Construction

[0024] As a result of the applicant's extensive research on monitoring the wear condition of the gripper band, it was finally found that the only detection technique that allows achieving the desired goal of continuously and efficiently measuring the condition of the gripper band is a detection technique based on optical measurements. In fact, these experiments demonstrate that optical measurements of reflectivity changes affecting a worn gripper strip surface - both in terms of spectral content and intensity of reflected radiation - relative to an intact surface of the same gripper strip allow for gripper Objective, reliable and repeatable assessment of the wear condition of the belt. Optical measurements can also be made smoothly on moving gripper strips, allowing the exploration of wide surfaces of gripper strips subject to wear phenomena; they require limited installation volume and lend themselves to being subsequently automatically processed to Obtaining an optical profi...

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PUM

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Abstract

The invention relates to a weaving machine including an optical device for monitoring wear of a gripper belt and a control method thereof. A gripper loom including a weft insertion system includes anoptical device monitoring a wear condition of at least one of gripper belts, a memory unit and a comparison unit. The optical device includes: a light source having a predetermined wavelength and emitting light radiation to a surface of the gripper belt as the gripper belt moves; a sensor, which is used for detecting the intensity of optical radiation reflected by the gripper belt during movementand sending out a corresponding electric signal sequence; and an acquisition device and a buffer memory, which are used for acquiring the electric signal sequence and transmitting an electric signal converted into a digital signal to a central control unit of the weaving machine. In the memory unit, the digital signal is saved as a historical sequence of optical profiles of the gripper belt at thewavelength at a subsequent time, and the comparison unit compares the processed latest optical profile with the saved historical sequence of optical profiles and provides an evaluation of the progressive wear condition of the gripper belt.

Description

technical field [0001] The present invention relates to a weaving machine comprising a flexible belt (hereinafter simply denoted "gripper belt") for monitoring the drive of two grippers for weft insertion in a gripper loom. strap)”) optical device for wear condition. In particular, the present invention relates to a control device that continuously monitors the wear condition of the gripper belt and sends an alarm signal to the central control system of the loom before the wear of the gripper belt reaches a level that endangers its mechanical strength. [0002] The invention also relates to an automatic control method for said loom. Background technique [0003] Known to those skilled in the art and as figure 1 As schematically shown in , in a gripper loom, the weft feeding gripper and the weft receiving gripper are controlled by means of two flexible gripper belts T which respectively fix the weft feeding gripper or the weft connecting gripper at one end thereof The alte...

Claims

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Application Information

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IPC IPC(8): G01N21/47D03D47/18
CPCG01N21/47D03D47/18G01N2021/4735D03D47/272D03J1/24
Inventor L·安德烈M·洛伦佐
Owner ITEMA
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