SU1597616A1 - Strain-measuring dynamometer - Google Patents

Abstract

The invention relates to a measurement technique, in particular, strain gauge devices for multicomponent force measurements, and can be used to create multicomponent dynamometric systems. The purpose of the invention is to enhance the functionality of the dynamometer by measuring the three components of the force while maintaining the increased compactness and rigidity of the structure. The strain gauge dynamometer contains rigid support bases 1, two mutually perpendicular pairs of longitudinal elastic beams 2,3 with converters R ₁ ... R ₄ and R ₅ ... R ₈ located symmetrically relative to the longitudinal axis of the dynamometer. The cross section of the intermediate base is made in the form of an octahedron. Four longitudinal faces are oriented parallel to the plane of the elastic beams 2,3. In other faces, there are made through transverse cuts, by means of which transverse elastic plates 8 are formed along the edges of the intermediate base, and the cuts walls are sensitive elements. When tested in a wind tunnel, a dynamometer acts on the aerodynamic force. In this case, the longitudinal component causes bending of the sensitive elements. In this case, the electrical signal from the measuring diagonal is proportional to the magnitude of the measured force. When exposed to a transverse force, the bases 1 are displaced, and beams 2 are bent. The signal from the measuring diagonal of this bridge corresponds to the measured transverse force. Similarly, the measurement of lateral force. 7 il.

Description

1.

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the three components of the force while maintaining the compactness and rigidity of the structure, the strain gauge dynamometer contains rigid support bases 1, two mutually perpendicular pairs of longitudinal elastic beams 2,3 with transducers, ... R and R., R, are located symmetrically relative to the longitudinal axis of the dynamometer, the cross section of the intermediate base is made in the form of an octahedron. Four longitudinal faces are oriented parallel to the plane of the elastic beams 2,3, In other faces, you are 15

through cross-cutting out-, cuts through which

kva m intermediate base about 164

1 transverse elastic plates 8, and the walls of the cutouts are sensitive elements. When tested in a wind tunnel on the dynamometer operates the aerodynamic cima. In this case, the longitudinal axis of the tapping point causes its bending of sensitive elements. In this case, the electrical signal from the measuring diagonal is proportional to the magnitude of the measured force. Under the influence of a transverse force, the bases 1 are displaced, and beams 2c are bent. The signal from the measuring diagonal of this bridge corresponds to the measured transverse force. Similarly, the measurement of the lateral force, 7 or more

The invention relates to a measurement technique, in particular, to tensometric devices for multi-component measurement of forces, and can be used to create a single-component dynamometer system.

The purpose of the invention is to enhance the functionality of the dynamometer by measuring the three components of the force while maintaining the increased compactness and design of the design.

Figures 1 and 2 show a dynamometer, a general view; on - section aa on fig „1; FIG. 4 is a section BB in FIG. 1; FIGS. 5 - 7 — electric circuits for connecting transducers in voltage transducers

The strain gauge dynamometer contains support bases 1 (fig1) placed along the edges of the dynamometer, a pair of longitudinal elastic beams 2 in the transverse direction with strain gauges Ri ,,, R4 for measuring the normal force Y, a pair of beams 3 longitudinal in the transverse direction 3 with strain gauges R5e, R8 (FIG. 4) for measuring lateral, strength and intermediate base 4 in the form of an octahedron, with the face 5 parallel to the outer scosco of the elastic longitudinal beams 2, and on the face 6 to the outer planes of the beams 3

Cross-cut notches are made in face x 7, forming transverse elastic plates 8 (Figs, 1 and 2) and the longitudinal walls of the cutouts 9 are additional sensitive elements with strain gauges R9o, R16 (Figs 3) for measuring the longitudinal force X. Tension converters RI ,., R4,

RSoo.RSj R9, oRI6 are connected in bridged electrical circuits in accordance with FIGURE 7о. To increase the selectivity to measure its force in the elastic longitudinal beams, cylindrical undercuts 10 are located, which are located opposite the strain gauges. For the convenience of placing the spreading lines in the body of the scales in the supporting bases 1, the through longitudinal holes 1 of FIG. 1 are made. Thus, the power diagram of the tensometer and the meter consists of two pairs of perpendicular resilient in the plane of the measured

loads of beams, the ends of which are interconnected by an intermediate base, in which cuts and transverse elastic plates are made in the space between adjacent elastic beams, forming elastic parallelograms in which additional sensitive elements are placed

The dynamometer works as follows.

When testing in the wind tunnel of the model, the aerodynamic force acts on the dynamometer.

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FIG. 6

Compiled by MoMalginova Editor E.Papp Tehred M.Hodanych

Order 3043

Circulation 480

VIIPI of the State Committee for Inventions and Discoveries at the State Committee on Science and Technology CQCP 1.13035, Moscow, Zh-35, 4/5 Raushsk nab.

Production and Publishing Combine Patent, Uzhgorod, Gagarin Street, 101

1597616

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FIG.

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FIG. 7

Proofreader S.Shevkun

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Claims (1)

Claim A strain gauge dynamometer containing rigid support bases, two mutually perpendicular pairs of longitudinal sensing elements made in the form of elastic beams, located symmetrically relative to the longitudinal axis of the dynamometer and an intermediate base located between both pairs of beams and connected to it from the side opposite to that connected to the corresponding support base, t the fact that, in order to expand functionality by simultaneously measuring three components with With increased compactness and structural rigidity, it is equipped with additional sensitive elements, the intermediate base being made in the reed of an octahedron, the four longitudinal faces of which are parallel to the planes of the elastic beams, and the other faces are made through transverse cutouts forming transverse elastic plates, while the longitudinal walls are sensitive elements. Fig. £ Figure 3