SU1283568A1 - Apparatus for testing articles for vibration impact loads - Google Patents

Abstract

This invention relates to a technique for dynamic testing of products. The aim of the invention is to increase operator comfort. This goal is achieved by presenting in time a specified and reproduced vibro-impact effects on the screen of a dual-beam oscilloscope. Vibrating shock is created using a random signal generator 1, a pulsed pulse former, a first adder 2, and a vibration driver 4. The signal from the vibration measuring transducer 6 is fed to one input of a two-beam oscilloscope 9. The other input of the oscilloscope 9 is supplied with a detected vibration impact signal, a pattern formed by a pattern, a pattern formed by a pattern, a pattern formed by a vibrator 9, a patterned signal generator 6 is sent to the other oscilloscope input 9. 10 sinusoidal oscillations, a driver 5, a shock pulse, a second adder 11, and a detector 12. Gil. I (L

Description

to

00 00

ate

oh

00

one

The invention relates to a testing technique, in particular to devices for testing products for vibro-impact effects.

The purpose of the invention is to improve the usability by presenting the specified and reproduced test modes in time.

The drawing shows a block diagram of a device for testing products for vibration impact loads.

The device contains a randomly connected generator 1 of a random signal, an adder 2, a power amplifier 3 and a vibration exciter 4, a shock pulse shaper 5 connected to the second input of the adder 2, a vibration measuring transducer mounted on the Mobile part 7 of the vibration exciter 4 and connected to the analyzer 8 and the visual display unit information, made in the form of a two-beam oscilloscope 9, as well as a generator of 10 sinusoidal oscillations, a second adder 11 and a detector 12. The inputs of the second adder 11 are connected s 5 to the input of the shock pulse generator 10 and the output of the sine wave, and an output - to a detector 12, whose output is connected to a second input of block

visual display of information. one

The device works as follows.

A random signal from the output of generator 1 and a shock pulse from the output of shaper 5 signals in the form of a non-stationary vibro-impact oscillation process with peak amplitudes of a random signal changing according to the law specified by shaper 5 of a shock pulse, is fed through an amplifier 3 to vibration exciter 4. Vibro-measurement A solid transducer 6 mounted on the movable part 7 of the vibration exciter 4 converts the vibro-shock mechanical action on the product (or on the weight equivalent when the device is tuned to preset mode), fixed to the movable part 7 exciters 4 and transmits an electrical signal to the analyzer 8 and the oscilloscope 9, on the oscilloscope screen 9 is presented in a visual time information

25

2835682

about actually replayed test mode.

Simultaneously with the signal from the vibration measuring transducer 6

5 in phase with it, the second input of the oscilloscope 9 is supplied with a signal from the output of the detector 12, the input of which receives a signal from the second adder II. The output of the second adder 1I

The signal is a nonstationary oscillation process consisting of sinusoidal oscillations, the amplitude of which is changed in accordance with the law of change of the shock acceleration pulse specified by the driver 5. The signal at the output of the detector 12 arrives at the second input of the visual information display unit (oscilloscope 9),

 represents a sequence of unipolar half-sinusoidal pulses, the frequency of which is equal to the oscillation frequency of the generator 10, and the amplitudes change in accordance with the shape of the shock pulse set by shaper 5. On the oscilloscope 9 visually the information of a given vibro-impact effect and on reproducible on the test object (product) test mode. This allows you to quickly control the current parameters of dynamic loading, to compare the peak values of vibration of random vibration with the required loading parameters, as well as to control the frequency spectrum.

 filling the shock pulse of a random vibration.

Claims (1)

The claims of the device for testing vibratory shock loads, containing a series-connected random signal generator, a first adder, a power amplifier and a vibration exciter, a shock pulse driver connected to the second input of the adder, a vibration measuring transducer mounted on the moving part of the vibration exciter and connected to the analyzer and the unit of visual display of information, a generator of sinusoidal oscillations and a second adder connected to it, characterized by about the purpose thirty 45 50 55 312835684 Enhance convenience in the operation of the input to the block of the visual display of the representation of the time-specified information, which is reproduced and used as a two-beam test, it is equipped with a detector, and a driver of the shock input is connected to the output of the -5 pulse connected also to the second of the second adder, and the output is to the high-input input of the second adder.