SU1030689A1 - Resonance testing stand - Google Patents

Abstract

1. A RESONANT TEST BENCH, containing a base and vibration mounted dampers and a resonator, made in the form of two parallel beams, the ends of which are connected to each other and to the base, with one short beam of beams used to install the product under test, and the middle part of the other beam interacts with an exciter, characterized in that, in order to increase the operating frequency, the ends of the beams are rigidly connected with each other and with the base. 2. A stand according to claim 1, distinguishing between u and the fact that the elements connecting the ends of the beams are made in one piece with the beams. f p 3 OO about about: 00 figure 1

Description

: The invention relates to a test bench, namely to resonant: test benches for testing, for example, electronic measuring transducers, tensor resistors and other instruments.

Resonant test benches are known for testing products, for example, resistance strain gages, containing a base and an airborne exciter and a resonator installed on it, built in the form of a chamber-to-tone, and one of the branches of the tuning fork is used to install the test piece, and the other is connected to a vibrating vibration sensor. L1 1.

The deficiency of this stand is -15 about the lack of testing in high frequencies (500 Hz and above).

Closest to / invented by. The technical essence and the result that is achieved is the result of a resonant test stand containing a base and an exciter mounted on it and a resonator, which is sweat-shaped in the form of two parallel beams, the ends of which are connected 25 with each other and with the base, one of which The beams are used to set up the test subject, and the middle part of the other beam interacts with vibration: Lem C23., 30

In the famous stand, the beams of the beams are connected to each other and to the base by an elastic bond. The stand makes it possible to obtain large oscillations in the region of more rolls, i of such frequencies, since under condition 35 of dd1p1 and cross section, the beam, in which both ends are fixed, has a higher natural frequency than the cantilever beam. However, the elastic bond of the Koshov beams does not ensure that the maximum (frequency beams of these sizes) of natural frequency is obtained, which restricts the operating frequency of the stand.

The aim of the invention is to increase the operating frequency of the resonant test bench 45.

The goal is achieved by the fact that in a resonant test bench containing a base and a vibration-suppressor mounted on it and a resonator made in the form of two parallel beams, the Kostos of which are interconnected with each other and with the base, one or more of the beams serve to set the test item , but

the middle part of the other beam interacts with the vibration exciter, the ends of the beams are interconnected with each other and with the base rigidly.

Elements connecting the ends of the beams are populated in one piece with beams.

Due to this arrangement, the working frequency increases, since the quality of the oscillating system increases, due to the absence of deflection in the elements associated with the sound of resonator beams.

Fig. 1 shows the proposed stand, a general view of Fig. 2 - the same plan; i in FIG. 3 Section A-A in FIG. 1.

The bench contains base 1, made in the form of a mounting plate, and vibration exciter 2 and resonator mounted on it, including two parallel beams 3 and 4, the ends of which are rigidly connected with each other and with the base using elements 5 and 6, bushings 7 and screws 8. In the middle part of the beam 3, the tested products are installed, for example, tensors 9,

The middle part of the beam 4 is connected with the moving part of the vibration exciter 2. Elements 5 and 6 to increase the quality factor of the resonator. can be completed for one whole with beams 3 and 4, forming a frame structure with them. Beam 3 may have a smaller mass, for example, at the expense of a smaller width than beam 4, associated with the vibratory vibration 2, which will ensure, at resonance, greater amplitude of oscillations.

Work on the bench is done in a hello manner.

The strain gauges 9 that are sent are glued to the middle part of the beam 3 from the outside and (1) to the inside of it. At. applying gp-1tash1 to exciter 2, its mobile system begins to vibrate, causes the beam 4 associated with it to oscillate. At the same time, the other beam 3 enters into resonance with beam 4. If the mass of beam 3 is less than the mass of ball 4: ki 4, then the amplitude of its oscillations will be greater than the amplitude of oscillations of beam 4,

The use of the present invention allows an increase in the working frequency p (onance test bench and thanks to this, it is carried out by accelerating tests at a high load level.

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Claims (2)

1. RESONANCE TEST - A NEW STAND containing a base and a vibration exciter and a resonator mounted on it, made in the form of two parallel beams, the ends of which are connected with each other and with the base, one of the beams used to install the test product, and the middle part of the other beam interacts with a vibration exciter, different the fact that, in order to increase the working frequency, the ends of the beams are tightly connected with each other and with the base. 2. Stand pop. 1, I am distinguished by the fact that the elements for connecting the ends of the beams are made in one piece with the beams. figure 1