SU1659872A1

SU1659872A1 - Accelerometer

Info

Publication number: SU1659872A1
Application number: SU884491593A
Authority: SU
Inventors: Михаил Владимирович Тюрин; Нина Васильевна Марова; Николай Серафимович Мешков
Original assignee: Предприятие П/Я А-1891
Priority date: 1988-10-10
Filing date: 1988-10-10
Publication date: 1991-06-30

Abstract

Изобретение относитс к измерительной технике, а именно к конструкци м датчиков линейных ускорений - акселерометрам, и может быть использовано дл измерени ускорений при движении различных объектов . Цель изобретени - повышение помехозащищенности от действи поперечных ускорений, параллельных упругим элементам . Чувствительный элемент состоит из несущего элемента 5, четырех упругих элементов 6 и инерционной массы 7, упругие элементы представл ют собой балку с двум упругими перемычками 8. Кольцевые электроды опорного конденсатора формируютс по периферии основани и на несущем элементе 5, а круглые электроды измерительного конденсатора формируютс в центре основани и на инерционной массе 7. Таким образом измерительный конденсатор чувствителен к измер емому параметру . Под действием линейного ускорени положение инерционной массы 7 изменитс благодар прогибу упругих перемычек 8, и, соответственно, происходит изменение зазора между электродами измерительного конденсатора, расположенного на основании и инерционной массе 7. При воздействии ускорени перпендикул рно измерительной оси центр т жести инерционной массы посто нно находитс симметрично поверхности несущего элемента, на которой закреплены упругие элементы. 1 з.п. ф-лы, 5 ил. ЁThe invention relates to a measurement technique, in particular, to designs of linear acceleration sensors — accelerometers, and can be used to measure accelerations during the movement of various objects. The purpose of the invention is to increase the noise immunity from transverse accelerations parallel to the elastic elements. The sensing element consists of a carrier element 5, four elastic elements 6 and an inertial mass 7, the elastic elements are a beam with two elastic jumpers 8. The ring electrodes of the reference capacitor are formed around the periphery of the base and on the carrier element 5, and the round electrodes of the measuring capacitor are formed in center of the base and inertial mass 7. Thus, the measuring capacitor is sensitive to the measured parameter. Under the action of linear acceleration, the position of the inertial mass 7 changes due to the deflection of the elastic jumpers 8, and, accordingly, the gap between the electrodes of the measuring capacitor located on the base and the inertial mass 7 changes. Under the action of the acceleration perpendicular to the measuring axis, the center of gravity of the inertial mass is constantly symmetrically to the surface of the bearing element, on which elastic elements are fixed. 1 hp f-ly, 5 ill. Yo

Description

Фиг.ЧFig.Ch

5-65-6

Фиг. 5FIG. five

Claims

Claim

1. The accelerometer containing a base mounted on it with a sensitive element, consisting of a bearing element, an inertial mass and four paired in parallel elastic elements connected at one end with a bearing element, and the other with an inertial mass, and a displacement transducer, characterized in that , in order to increase the noise immunity from the action of transverse accelerations, parallel elastic elements have thinning in the places of their connection with the bearing element and inertial mass, and for one pair of parallel of elastic elements they are made on one side of. the neutral plane of the sensor, and for another pair of parallel elastic elements, on the other side of the neutral plane of the sensor.

2. The accelerometer according to claim 1, with the fact that the displacement transducer is capacitive, consisting of a reference and measuring capacitors, and the reference capacitor is made in the form of ring electrodes located on the supporting element and the base, and the measuring one is in in the form of round electrodes located on the inertial mass and the base, while all the electrodes are coaxial, and the electrodes located on the supporting element and the inertial mass are connected by a jumper through one of the elastic elements.