RU2423667C1 - Detecting element of vibration gyroscope - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: detecting element of vibration gyroscope has an outer movable and inner fixed part, joined by a suspension system in which there are elastic members, each having six segments. The fourth, fifth and sixth segments lie on the other side of the radius running from the centre of the fixed part relative the first, second and third segments. The lengths of the first and fourth segments, second and fifth segments, third and sixth segments, respectively, are equal.

EFFECT: invention enables to eliminate angular displacements in the detecting element of the vibration gyroscope when exciting radial oscillations of the movable part.

2 dwg

Description

The invention relates to the field of measuring equipment, namely to converters of angular velocity into an electrical signal.

A known sensitive element of a vibration gyroscope [1], containing an external fixed part and an internal movable part, interconnected by a suspension system with elastic elements.

The closest in technical essence is a sensitive element of a vibrating gyroscope [2], containing an external movable part and an internal fixed part connected to each other by a suspension system made of n circular elastic elements, each of which contains n elastic elements, each of which contains the first, second and a third segment, the first segment being radially directed from the center of the fixed part toward the movable part and connected at one end to the fixed part, connected at its second end to one end of the second segment, which is connected by the second end to the first end of the third segment and directed along an arc of a circle concentric with the outer generators of the movable and fixed parts, the third segment is radially directed from the center of the fixed part towards the movable part and is connected by its second end to the movable part .

The disadvantage of this sensitive element of the vibrating gyroscope is the angular displacement of the moving part relative to the fixed part, which occurs when the radial angular oscillations of the moving part are excited when operating as part of a vibrating gyroscope.

The technical result of the invention is the elimination of angular displacements in the sensitive element of the vibrating gyroscope when exciting radial vibrations of the moving part.

This technical result is achieved in a sensitive element of a vibrating gyroscope, comprising an external movable part and an internal stationary part connected to each other by a suspension system made of n elastic elements, each of which contains first, second and third segments, moreover, the first segment is directed along the radius from the center of the fixed part towards the movable part and is connected at one end to the fixed part, connected at its other end to one to end of the second segment, which is connected by the second end to the first end of the third segment and directed along an arc of a circle concentric with the external components of the movable and fixed parts, the third segment is radially directed from the center of the fixed part towards the movable part and is connected by its second end to the movable part, that in each elastic element the fourth, fifth and sixth segments are made, the fourth segment is connected at one end to the fixed part in the connection zone of the first segment with the fixed part, the other end connected to one end of the fifth segment and directed toward the movable part radially from the center of the fixed part, the fifth segment is connected by its second end to one end of the sixth segment and directed along the arc of the same circle as the second segment, in the direction opposite to the direction of the second segment, the sixth segment is connected at its second end to the movable part and directed radially from the center of the fixed part, the length of the fourth segment is equal to the length of the first segment, the length of the fifth segment is equal to the length of the second segment nta, the length of the sixth segment is equal to the length of the third segment.

By performing the fourth, fifth and sixth segments in each of the elastic elements, the angular displacements of the movable part are eliminated, since the presence of the fourth, fifth and sixth segments impedes the movement caused by deformation of the first, second and third segments during radial vibrations of the movable part.

Figure 1 presents a General view of the sensitive element of the vibrating gyroscope, figure 2 is a view of an elastic element.

The sensitive element of the vibrating gyroscope (Fig. 1) contains an internal stationary part 1 with an external generatrix 2 in the form of a circle, an external movable part 3 with an internal generatrix 4 in the form of a circle, and the external generatrix 5 in the form of a circle. The movable part 3 is connected to the fixed part 1 by elastic elements 6 ', 6 "... 6 ⁽ⁱ⁾ , ... 6 ⁽ⁿ⁾ . The fixed part 1, the movable part 3 and the elastic elements 6', 6" ... 6 ⁽ⁱ⁾ , ... 6 ^{(n) are} made by a single element in a single crystal silicon wafer.

The elastic element 6 '(Fig.2) contains the first segment 7, the second segment 8, the third segment 9, the fourth segment 10, the fifth segment 11, the sixth segment 12. The first segment 7 of length L _{1 is} connected at one end to the fixed part 1 on the outside forming 2, with its other end connected to the second segment 8 and directed towards the movable part 3 along the radius drawn from the center O of the fixed part 1.

The second segment 8 is connected at its other end to one end of the third segment 9, directed along an arc of a circle concentric with the circumference of the outer generatrix 2 of the fixed part 1, and is made of length L ₂ .

The third segment 9 of length L _{3 is} directed along the radius from the center O of the fixed part 1 towards the movable part 3 and is connected at its other end to the movable part 3 along the inner generatrix 4 of the movable part 3.

The fourth segment 10 of length L _{4 is} connected at its one end to the fixed part 1 along the outer generatrix 2 of the fixed part 1 in the area where the first segment 7 is connected to the fixed part 1. The fourth segment 10 is radially directed from the center O of the fixed part 1 towards the movable part 3 and connected at its other end to the fifth segment 11.

The fifth segment 11 is directed along an arc of a circle concentric with the circumference of the outer generatrix 2 of the fixed part 1, connected to one end of the sixth segment 12 and is made of length L ₅ . In this case, the fifth segment 11 is directed in the opposite direction compared with the direction of the location of the second segment 8.

The sixth segment 12 of length L _{6 is} connected at its second end to the movable part 3 along its inner generatrix 4 and is directed towards the movable part 3 along the radius from the center O of the fixed part 1.

The elastic element 6 'is made so that the length L _{7 of the} fourth segment 10 is equal to the length L _{1 of the} first segment 7, the length L _{5 of the} fifth segment 11 is equal to the length L _{6 of the} second segment 8, the length L _{6 of the} sixth segment 12 is equal to the length L _{3 of the} third segment 9.

In a similar manner, elastic elements 6 "... 6 ⁽ⁱ⁾ , ... 6 ^{(n) are made} .

When excited in a vibrational gyroscope of radial vibrations of the movable part 3, the distance between the outer generatrix 2 of the stationary part 1 and the inner generatrix 4 of the movable part 3 changes.

If the elastic suspension 6 'consisted only of the first 7, second 8 and third 9 segments, then when the distance between the beginning of the first segment 7 and the end of the third segment 9 changed, the position of the beginning of the second segment 8 relative to its end would change, which should lead to the angular movement of the movable part 3 relative to the fixed part 1 in one direction. But since the elastic element 6 'has a fourth 10, fifth 11 and sixth 12 segments, a change in the position of the beginning and end of the fifth segment 11 leads to the angular movement of the movable part 3 in the opposite direction.

Thus, angular movement in one direction is compensated by angular movement in the other direction.

Therefore, angular displacements of the moving part 3 relative to the fixed part 1 are excluded when the radial vibrations of the moving part 3 are excited.

INFORMATION SOURCES

1. US patent No. 5262321, NKI 73/505, 75/517 A, IPC G01P 9/04. Vibrating planar gyroscope. 1993 year

2. RF patent No. 2331845, Cl. G01C 19/56, G01P 9/04. Vibrating gyroscope. 2008 year

Claims (1)

A sensitive element of a vibrating gyroscope, comprising an external movable part and an internal fixed part made with external circumferential shapes, interconnected by a suspension system in which n elastic elements are made, each of which contains first, second and third segments, the first segment being directed along the radius from the center of the fixed part towards the movable part and at one end is connected to the fixed part, connected to one end of the second segment, which is connected to the second by its second end end with the first end of the third segment and directed along an arc of a circle concentric with the outer generators of the movable and fixed parts, the third segment is directed along the radius from the center of the fixed part to the side of the moving part and is connected by its second end to the moving part, characterized in that in each the fourth, fifth and sixth segments are made of the elastic element, the fourth segment is connected at one end to the fixed part in the area of the first segment to be connected to the fixed part, the other end is connected to one end of the canopy segment and directed toward the movable part in radius from the center of the fixed part, the fifth segment is connected by its second end to one end of the sixth segment and is directed along the arc of the same circle as the second segment, in the direction opposite to the direction of the second segment, the sixth segment is connected its second end with the movable part and directed radially from the center of the fixed part towards the movable part, the length of the fourth segment is equal to the length of the first segment, the length of the fifth segment is equal to the length of the second segment, the length of the sixth segment is equal to the length of the third segment.

Images