Yarn tension sensor
A tension sensor and weft yarn technology, applied in tension measurement, textile, textile and paper making, etc., to achieve the effect of high reliability, simple structure and long service life
Inactive Publication Date: 2009-09-30
WUJIANG WANGONG ELECTROMECHANICAL EQUIP
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Problems solved by technology
The three stages correspond to different tension states and time processes. The existing measurement of the time process can be obtained by measuring the time when the weft reaches the weft catcher and using photoelectric reflection to detect the arrival time of the weft. However, there is no online real-time The parts that measure the weft flight tension are actually more important to measure the weft flight tension than the arrival time of the weft yarn, because knowing the weft flight tension at each stage can correctly understand the whole process of weft flight
Method used
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[0016] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0017] Sensitive element is an element that converts the strain change on the measured object into an electrical signal. There are many types of sensitive elements, among which resistance strain gauge (referred to as resistance gauge or strain gauge) is the simplest and most widely used. At the same time, the strain gauge is tightly bonded to the substrate that produces mechanical strain through the adhesive. When the substrate is stressed and the stress changes, the resistance strain gauge also deforms together, so that the resistance value of the strain gauge changes. As a result, the voltage applied to the resistance changes. The resistance change of this strain gauge is usually small when it is stressed. Generally, this strain gauge forms a strain bridge, which is amplified by a subsequent instrument amplifier and then transmitted. To t...
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Abstract
The invention relates to a weft yarn tension sensor, which comprises a sensing matrix with a cavity, at least three roller bodies arranged above the sensing matrix at intervals and in parallel, and a sensor for converting strain changes into electric currents pasted on the outer wall of the cavity. The sensitive element of the signal, the connecting line of each axis center of the roller body on the same cross section is an inverted triangle, and when the weft yarn passes through each roller body, its flying tension makes the force generated by the roller body transmitted to the sensitive element through the sensing matrix Thereby causing the deformation of the sensitive element and outputting the electric signal. The weft yarn tension sensor can accurately calculate the weft yarn tension through the processing of the back-end processing module connected with the sensitive element. The weft yarn tension sensor has a simple structure, strong service life and high reliability. It can be applied to the air-jet loom. Real-time measurement of dynamic weft tension can greatly improve the control of air-jet looms and the success rate of weft insertion.
Description
technical field [0001] The invention relates to a measuring part for online real-time measurement of weft yarn tension on an air-jet loom. Background technique [0002] The air-jet loom uses airflow to achieve weft insertion, and the flight process of the weft yarn is divided into a starting stage, a free flight stage and a restrained flight stage. The three stages correspond to different tension states and time processes. The existing measurement of the time process can be obtained by measuring the time when the weft reaches the weft catcher and using photoelectric reflection to detect the arrival time of the weft. However, there is no online real-time The components for measuring the weft flight tension are actually more important to measure the weft flight tension than the arrival time of the weft yarn, because knowing the weft flight tension at each stage can correctly understand the whole process of weft flight. Whether the weft insertion process is normal can be clear...
Claims
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IPC IPC(8): G01L5/04G01L5/10D03J1/00
Inventor 周平祝章琛
Owner WUJIANG WANGONG ELECTROMECHANICAL EQUIP