Rheostatic flexible sensing unit design and manufacturing method thereof
A technology of a sensing unit and a manufacturing method, applied in the field of sensors, can solve the problems such as obstacles to the wide application of liquid metal, cumbersome and time-consuming operation steps, finished products with low success rate, etc., so as to achieve a simple, efficient and universal manufacturing process and a short response time. , the effect of low power consumption
Inactive Publication Date: 2019-08-30
BEIHANG UNIV
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Problems solved by technology
However, due to the high surface tension of liquid metal and the existence of surface oxide layer, it is difficult to realize the customization of pattern by traditional printing or printing, and the existing patterning technology often involves tedious and time-consuming operation steps, expensive instruments The application of equipment and the low success rate of finished products hinder the wide application of liquid metal
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[0048] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0049] ginseng figure 1 As shown, the varistor type flexible sensing unit in this embodiment snaps off the flexible encapsulation layer 1, the liquid sensitive layer 2 sandwiched between the two encapsulation layers, and the confinement mutation layer 3 distributed on both sides of the sensitive layer, and the wear-through The elastic rope 4 and the lead wire 5 passing through the limit mutation layer.
[0050] The material of the sensitive layer 2 is preferab...
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The invention discloses a rheostatic flexible sensing unit design and a manufacturing method thereof. The rheostatic flexible sensing unit design comprises a flexible sensitive layer, an upper packaging layer, a lower packaging layer, a restrictive mutation layer, an embedded elastic rope and an outgoing lead, wherein the flexible sensitive interlayer is sandwiched between the upper packaging layer and the lower packaging layer, which is presented in the form that a micro-flow cell is full of a liquid conductive alloy; and when an elastic line passes through the restrictive mutation layer on both sides of the micro-flow cell to put the elastic rope under stress, the cross sectional area of the micro-flow cell is reduced, so that the increase in the resistance of the liquid alloy in the micro-flow cell can be known according to a resistance definition formula. Through embedding of the elastic rope, higher and more stable sensitivity are ensured for a device without lowering other sensing performance. The invention also discloses a manufacturing method of the micro-flow cell. A casting process and a lost-wax process are introduced, and the micro-flow cell is prepared successfully. The lost-wax process is easy to operate, and the process conditions are easy to control, so that the whole manufacturing process is simplified greatly; the production efficiency is improved; and the production cost is lowered.
Description
[0001] Technical field: [0002] The invention belongs to the field of sensors, in particular to the design and manufacturing method of a rheostat type flexible sensing unit. [0003] Background technique: [0004] Flexible sensing technology is a very challenging and potential development direction, and has broad development prospects in the fields of artificial intelligence, medical and health. With the rapid development of subdivided fields such as human-computer interaction and sports health monitoring, related products have put forward higher requirements for sensing products, and there is an urgent need for flexible and elastic sensing technologies with characteristics such as flexibility, bendability, and stretchability. In order to realize the measurement of specified physical quantities under the condition of covering three-dimensional static / dynamic surfaces. [0005] Since 2004, researchers in various countries have developed flexible sensing units based on piezores...
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IPC IPC(8): G01D5/16
CPCG01D5/16
Inventor 陈殿生卢思彤
Owner BEIHANG UNIV