SU932211A1

SU932211A1 - Resistance strain gauge manufacturing method

Info

Publication number: SU932211A1
Application number: SU802989664A
Authority: SU
Inventors: Виктор Николаевич Шалыгин; Лев Михайлович Шилимов; Андрей Григорьевич Оханов
Original assignee: Ленинградский Ордена Красного Знамени Механический Институт
Priority date: 1980-10-03
Filing date: 1980-10-03
Publication date: 1982-05-30

Description

(5) СПОСОБ ИЗГОТОВЛЕНИЯ ТЕНЗОРЕЗИСТОРА(5) METHOD OF MANUFACTURING A GENSOR

II

Изобретение относитс к измери1тельной технике, а именно к измерени м деформаций материалов с помощью тензорезисторов.The invention relates to a measuring technique, namely, to measuring the deformation of materials using strain gages.

Известен способ изготовлени тенэорезисторов , заключающийс в том, что чувствительный элемент выполн ют в виде нитевидного кристалла пироуглерода, соедин ют с электроизол ционной подложкой и припаивают серебр ной пастой к чувствительному элементу выводы ГП.A known method of manufacturing the resistors, in which the sensitive element is in the form of a pyrocarbon filamentary crystal, is connected to an electrical insulating substrate and soldered with silver paste to the sensitive element.

Недостатком данного способа вл етс невысока надежность в работе из-за выполнени чувствительного элемента из одной нити пироуглерода вследствие его высокой ломкости .The disadvantage of this method is low reliability in operation due to the performance of the sensing element from one strand of pyrocarbon due to its high fragility.

Наиболее близким по техническЫ) сущности к предлагаемому вл етс способ изготовлени тензорезистора , состо щего из чувствительного элемента и электроизол ционной подложки , заключающийс в том, чтоThe closest in technical terms to the present invention is a method for manufacturing a strain gauge consisting of a sensitive element and an electrically insulating substrate, consisting in that

чувствительный элемент, выполненный в виде проволочной решетки, про питывают полимерным материалом t2.The sensing element, made in the form of a wire grid, is fed with the polymer material t2.

Недостатком известного способа вл етс недостаточна надежность использовани изготовленных по нему тензорезисторов дл измерени деформаций композиционных материалов в процессе их изготовлени и хранени из-за несоответстви нагрузок, The disadvantage of the known method is the insufficient reliability of using strain gages made on it to measure the deformations of composite materials in the process of their manufacture and storage due to the disparity of loads,

10 испытываемых композиционными материалами , тем, которые может. выдер -жать тензорезистор, изготовленный по данному способу..10 tested composite materials, those that can. pull-down strain gauge manufactured by this method ..

Цель изобретени .- повышение на15 дежности, использовани тензорезистора при измерени х деформации ар-. к«1рованных полимерных материалов iThe purpose of the invention is to increase the reliability of using a strain gauge in measuring the deformation of ap-. to "1 polymeric materials i

Claims

This goal is achieved by the method of manufacturing a tensor resistor consisting of a sensitive element and an electrically insulating substrate, consisting in that the sensitive element is impregnated with a polymeric material, the sensitive element is made of a carbon fiber material and impregnated with the same impregnated material as in the reinforced material. polymer, and the leads are interwoven between the fibers of the sensing element and impregnated with a mixture of the same impregnate with an electrically conductive powder in an amount of 20–25 vol. tenzorezisto drawing shows a cross-sectional view. The strain gauge contains a sensing element made of carbon fiber material 1, an electrically insulating substrate 2 and conclusions 3. The method is carried out as follows. Between the fibers of the sensing element 1 made of a carbon-fiber unidirectional material, such as a Ural type carbon tape, before impregnation, the impregnate for the production of the electrically insulating substrate 2 is woven into pins 3 made of copper wire, and then impregnate the centerpiece with the same impregnated material Aue as a binder in api torn plastic, and the attachment areas of the pins - with the same impregnate, but with the addition of an electrically conductive powder, for example, nickel, in an amount of 20 - 25 D. Then a strain cutter A stopper is placed between the layers of reinforcing filler at a selected location and in a given direction. Conclusions 3 leads out of the limits of the item being tested. After the winding process is completed, the shells are cured. 11 The use of the invention allows to obtain the physicomechanical properties of the strain gauge close to the properties of the reinforced polymer material from which the test piece is made, which makes it possible to register the deformations of the casing, breaking the structural homogeneity of the base material and avoiding the concentration of stress defects in the structural material. test piece The method of manufacturing a strain gauge, consisting of a sensitive element and an electrically insulating substrate, is that the sensitive element of the strain gauge is impregnated with a polymeric material, characterized in that, in order to increase the reliability of using the strain gauge when measuring the deformations of reinforced polymeric materials, the sensitive element is are made of carbon fiber material and impregnated with the same impregnate as in the reinforced polymeric material under study, and the conclusions intertwined between the fibers of the sensing element and impregnated with a mixture of the same impregnate with an electrically conductive powder in an amount of 20-25%,%. Sources of information taken into account during the examination 1. USSR author's certificate No. 63857, cl. G, 01 B 7/18, 1972.

2. USSR author's certificate number 121588, cl. (i 01 B 7 / 18,1956 (prototype).