Constant stress coiling control system and method oriented to variable cross-section flexible electronics

Abstract

The invention belongs to the technical field related to coiling control of flexible electronics, and discloses a constant stress coiling control system oriented to variable cross-section flexible electronics. The constant stress coiling control system comprises a stress sensor, a stress controller, a coiling diameter sensor, an internal stress measuring device, an internal stress controller, an executive component and the like. The coiling diameter sensor is used for measuring the external diameter of a material coil; the stress sensor is used for detecting the stress of a film and feeding back the stress of the film to the stress controller to achieve closed-loop control over the stress; the internal stress measuring device comprises a set of pressure sensors, a conductive slip ring and a plurality of fixing parts, and is used for measuring and feeding back the internal stress distribution state of the material coils to the stress controller, and therefore the closed-loop control over the internal stress of the material coil is achieved. The invention further discloses a corresponding coiling control technique. Through the constant stress coiling control system, the internal stress in the material coil is uniformly distributed, and the quality of the material coil is improved.

Description

technical field [0001] The invention belongs to the related technical field of flexible electronic winding control, and more specifically relates to a constant stress winding control system and method for variable cross-section flexible electronic. Background technique [0002] At present, all kinds of flexible materials are generally transported and stored by being wound into rolls, and the winding quality of the rolls affects the transportation, storage and processing of the next process. In practical application, it is found that the distribution of internal stress of the material roll will directly determine the quality of the material roll. When the internal stress distribution of the material roll is not uniform, it is easy to cause uneven internal thickness of the film during storage, and even cause internal fracture in serious cases. . [0003] In particular, for flexible electronics such as flexible electronic displays, OLEDs, RFID tags, and thin-film solar panels,...

AI Technical Summary

Problems solved by technology

In this case, in addition to the commonality of other flexible materials, flexible electronics also have a common feature that the cross-section of the film often changes in the feeding direction, which makes the internal stress distribution of such rolls more complex. complex and difficult to control

[0004] In the prior art, taper tension control is generally used for this problem. The taper coefficient of winding tension is mostly selected based on production experience. However, in the case of large coil diameter, it is often difficult to obtain an ideal material by adjusting the taper coefficient Volume

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