SU1522050A1 - Elastic element for resistance strain gauge sensor of force - Google Patents

Abstract

This invention relates to force-measuring technique and is intended to accurately measure force. The aim of the invention is to extend the range of measurement of forces in the direction of low loads. The goal is achieved by the fact that the elastic element of the strain gauge force sensor is made of coaxially arranged inner 1 and outer 2 elastic rings connected by wires with which the levers are connected. The measured force P is applied to the ends of the arms and causes the deformation of the elastic rings 1 and 2, so that the strain gages 6 and 8 placed on them are compressed, and the strain gages 7 and 9 are expanded. Elastic rings 1 and 2, ti gi and levers can be made in one piece for increased accuracy. Through-grooves can be made in rings 1 and 2 to increase sensitivity. 3 hp f-ly, 3 ill.

Description

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The invention relates to load engineering and is intended to measure stresses.

The purpose of the invention is to expand the range of measurement efforts in the direction of low loads.

FIG. 1 depicts an elastic element. men t, side view; in fig. 2-section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The elastic element of the strain gauge force sensor consists of inner 1 and outer 2 coaxial elastic rings, transverse 3 and longitudinal 4 tons of g located in pairs near opposite end surfaces of these rings, levers 5, whose longitudinal axes are parallel to the axis of coaxial elastic rings, strain gages 6 and 7, wound with a strain on the inner elastic ring 1, as well as strain gages 8 and 9, wound also with a strain on the outer elastic ring 2. Coaxial rings 1 and 2, plugs 3 and 4 and levers 5 can be filled 25 in one piece. In the middle part of coax. elastic rings 1 and 2 are filled with slots 10, uniformly distributed in the circumferential direction.

The elastic element works as follows.

To the free ends of the levers 5 there are applied oppositely directed forces, LIA P, under the action of which their ends approach each other. Pair t g 4 compresses the ends of 35 coaxial elastic rings 1 and 2, and pair t g 3 stretches the other ends of these rings so that the rings rotate. In addition, the levers 5 facilitate the direct rotation of the coaxial elastic rings 1 and 2. Thus, the strain gauges 6 and 8 are compressed, and 7 and 9 are expanded, which leads to an imbalance of the electric bridge, the value of which is proportional to the measured force P.

Longitudinal and transverse ti gi, squeeze and stretch weakened elastic rings 1 and 2 in mutually perpendicular directions, also along the thief

They are increased by increasing the deformation under strain gauges 6, 8 and 7, 9. The length of the levers is directly proportional to the amount of strain under the strain gauges, the elasticity of the elastic element is determined only by the stiffness characteristics of coaxial elastic rings wound on them, and therefore this strength This element can be used to measure small forces.

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Formula inventions

Claims (4)

1. Elastic element of the strain gauge force sensor, containing coaxial elastic rings, on the side surface of which tensor strain gauges are wound with tension, characterized in that, in order to extend the measurement range towards low loads, the outer and inner coaxial elastic rings are connected longitudinally and transverse thrusts connecting the inner surface of the outer ring with the outer surface of the inner ring and located in pairs near opposite end surfaces of coaxial elastic rings in mutually perpendicular diametrical directions, one of which is equipped with driving levers whose longitudinal axes are parallel to the axis elastic rings. 2. The elastic element according to claim 1, which is characterized by the fact that the coaxial elastic rings, the connecting rods and the force lever are made in one piece. 3. The elastic element according to claim 1, which is characterized by the fact that in coaxial elastic rings, in the middle part, there are equally spaced through grooves, 4. The elastic element according to claim 1, 1, and T-1, which is due to the fact that the tensorosystomas are wound near the ends of the outer elastic ring and at the protruding ends of the inner elastic ring. Formula inventions 1. Elastic element of the strain gauge force sensor, containing coaxial elastic rings, on the side surface of which tensor strain gauges are wound with tension, characterized in that, in order to extend the measurement range towards low loads, the outer and inner coaxial elastic rings are connected longitudinally and transverse thrusts connecting the inner surface of the outer ring with the outer surface of the inner ring and located in pairs near opposite end surfaces of coaxial elastic rings in mutually perpendicular diametrical directions, one of which is equipped with driving levers whose longitudinal axes are parallel to the axis elastic rings. 2. The elastic element according to claim 1, which is characterized by the fact that the coaxial elastic rings, the connecting rods and the force lever are made in one piece. 3. The elastic element according to claim 1, which is characterized by the fact that in coaxial elastic rings, in the middle part, there are equally spaced through grooves, 4. The elastic element according to claim 1, 1, and T-1, which is due to the fact that the tensorosystomas are wound near the ends of the outer elastic ring and at the protruding ends of the inner elastic ring. Editor L.Pcholinsk 2 Compiled by V.Godzikovsky Tehred M. Didyk Proofreader M. Pojo ten