SU726450A1

SU726450A1 - Resonator for frequency pressure sensors

Info

Publication number: SU726450A1
Application number: SU782671931A
Authority: SU
Inventors: Иосиф Анатольевич Горенштейн; Ольга Николаевна Филатова
Original assignee: Предприятие П/Я А-1874
Priority date: 1978-10-09
Filing date: 1978-10-09
Publication date: 1980-04-05

Description

. - . f - . -. f -

Изобретение относитсй к контрольно-измерительной технике, и может быть использовано в частотных датчиках , в которых в качестве основного измерительного преобразовател используютсй тонкостенные цилиндрические резонаторы, в частности вдатчикакдавлений жидких и газообразных сред..The invention relates to the measurement and measurement technique, and can be used in frequency sensors, in which thin-walled cylindrical resonators are used as the main measuring transducer, in particular, in the detection of pressures of liquid and gaseous media.

Известны резонаторы с тонкостенны цилиндрическим активным (колеблю щимс ) участком, выполненным из материалов или сплавОв, имеющих изотропную поликристаллическую структуру 1.: ч Known resonators with thin-walled cylindrical active (oscillating) section, made of materials or alloys with an isotropic polycrystalline structure 1 .: h

Недостаток таких резонаторов расщепление спектра форм и частот их собственных колебаний вследствие технологических отклонений параметров резонатора (толаданы стенки и других геометрических размеров однород- ности физических свойств материала и др.) от их номинальных значений. , Наиболее близким-к изобретению по технической сущности йвл етс The lack of such resonators is the splitting of the spectrum of the forms and frequencies of their natural oscillations due to technological deviations of the resonator parameters (wall thickness and other geometric dimensions of the homogeneity of the physical properties of the material, etc.) from their nominal values. The closest to the invention of the technical essence is the

резонатор с активным участком, вдоль образующих которого выполнены ребра 2.a resonator with an active region, along the generators of which ribs 2 are made.

Недостатком такого резонатора . вл етс то, что под действием давлеThe disadvantage of such a resonator. is that under the action of pressure

ни в материале резонатора возникают не т ОлЫко деформации растйжени -сжати ,но и изгибные деформации постойнного знака, что приводит к понижению точности преобразовани давлений в частоту.Not in the material of the resonator there are not tLyO deformations of stretching and compression, but also bending deformations of a postoynny sign, which leads to a decrease in the accuracy of converting pressures into frequency.

Цель изобретени - повышение точности преобразований давлений в частоту собственных колебаний резонатора .The purpose of the invention is to improve the accuracy of pressure conversions to the natural frequency of the resonator.

Цель достигаетс тем, что в резонаторе с тонкостенным разнотолщинным цилиндрическим активным y iacTком то. стёнкйэ1О1 б учас- Тса выполнена с периодически переменной вдоль периметра их поперечного оеченй толщиной; при этом рассто ний R и Rg от оси активного участка до его наружной и внутренней поверхности измен ютс в соответствии с формулаМи .The goal is achieved by the fact that in a resonator with a thin-walled, thick-walled, cylindrical active yacT, then. stenkie1O1 b part- Tsa is made with a periodically variable thickness along the perimeter of their transverse eyes; in this case, the distances R and Rg from the axis of the active region to its outer and inner surface change in accordance with the formula M.

. tna. т . tna. t

ЦПCPU

cos-2n4cos-2n4

m№m№

mat тптmat tpt

WW

соз-ЙпЧSoz-Ypch

где .R. - радиус ;редней линииwhere .R. - radius; redline

поперечного сечени сте .нок активного участкаcross-section of the glass. active site

Claims

resonator; - the thickness of the stack of the active part of the resonator is minimal; - the maximum wall thickness of the active part of the resonator; - the angle between the initial and current positions of the radii vectors .R and R. is a multiple of two. Figure 1 shows the general view of the resonator; on. 2 - the cross section of its active area (2a) and the selected form of bending vibrations (2b); in fig. 3 - variants of the forms of constructive implementation of the resonator. The resonator is: a monolithic structure in the form of a cup. thin-walled thick-skinned: by a cyanide active region 1, at one end of which there is a thickened bottom 2, and at the other thickened mounting juice 3. The wall thickness in the cross section of the active part of the resonator periodically changes, taking the maximum values and minimum values of b („and antinodes x 5. Fig. 2 shows the cross sectional shape of the active part of the resonator (2a) - and its shape is combined with bending vibrations for the case, that is, when two full waves are excited in the resonator I. .. Fig. 3 shows several variants of the design of resonators. The distinctive features of these options are taken shortly from the drawing and do not require special explanations. The thickening in the zones of transition from the thin-walled, active part of the TOJJa to the thickened The use of the invention makes it possible to increase the accuracy of pressure measurement several times. Claims of the Invention Resonator for frequency pressure sensors containing different thicknesses of a cylindrical active section, characterized in that, in order to increase the accuracy of pressure to frequency conversion, the walls of the active section are made periodically Variable along the perimeter of their cross section thickness to its outer and inner surfaces, the following ratios are met. V gpah mm cos-2n4 V «where R. - radius of the middle line. cross-sectional walls of the active region; minimum wall thickness of the active area; max is the maximum value. ; Wall thickness of the active area; . - the angle between the initial and. the current positions of the radius vectors; n is a multiple of two. Sources of information taken into account in the examination 1. The author's certificate of the USSR No. 427256, cl. G 01 L I / 00, 1972. 2, Copyright. The USSR certificate in application number 2456148 / 18-10, 11.01.78 (prototype) ..

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FIG. i

726450