SU1493889A1 - Device for measuring dynamic loads - Google Patents

Abstract

The invention relates to force-measuring technique and permits an increase in the accuracy of measuring dynamic loads by eliminating the influence of gyroscopic moments. The device includes a machine 1, mounted on three-component force sensors 2, 3, 4, 5, which are mounted on a rigid intermediate base 6, mounted on one-component vibration isolators, positioners 7, 8, 9, connected to the base 10. On the intermediate base 6 are installed displacement sensors 11, 12, 13, the outputs of which are connected to the input of transducers 14, 15, 16 of the sensor signals. The machine 1, which generates dynamic loads through force sensors 2, 3, 4, 5, acts on the intermediate base 6, whose positioning, which prevents the appearance of gyroscopic moments, is carried out using vibration isolators of positioners 7, 8, 9. Signals from the sensors are received to converters 14, 15, 16, after which they are recorded and processed. 1 il.

Description

The invention relates to a power engineering technique and is intended to determine the dynamic loads exerted by the working equipment on the supporting building structures.

The purpose of the invention is to improve the measurement accuracy by eliminating the influence of gyroscopic moments.

The drawing shows a diagram of the device.

The device includes a machine 1, mounted on three-component force sensors 2-5, which are mounted on a rigid intermediate base 6, made in the form of a platform, which is mounted on single-component vibration isolators-positioners 7,8,9 Zones with base 10 On the intermediate base 6, sensors of 11,12,13 linear displacement parameters are installed, and their sensitivity axes coincide with the axes of active vibration isolators-positioners 7,8,9. The outputs of sensors 11, 12, 13 are connected to the input of converters 14, 15, 16 of sensor signals, the outputs of which are connected to the control input of active vibration isolators-positioners.

The device works as follows.

Machine 1

generating dynamic loads through sensors 2-5 forces act on intermediate base 6. On the reverse side, one-component active vibration isolators, positioners 7,8,9, act on the intermediate base. Positioning is carried out only in one direction (vertical) as follows: signals from sensors 11,12,13 absolute linear displacement parameters, which can be, for example, seismic instruments (accelerometers, displacement sensors) are fed to converters 14,15 , 16 sensor signals, which form the signal necessary for controlling active vibration isolators by positioners 7,8,9, which may be, for example, pneumatic, electromagnetic, etc. Sensors 11, 12, 13, transducers 14, 15, 16, and positioners 7, 8, 9 form three position feedback loops.

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platform along the vertical axis. It is also possible to provide Positioning on other axes by noting another three feedback loops on mutually perpendicular horizontal axes (two along one axis and one along the other). However, as a rule, the stiffness of real-life bases is 10 in a 10-point pattern. direction is much lower

than the stiffness in the horizontal direction, so the errors in the horizontal direction are less than the vertical. Therefore, positioning by

15 all directions are not required. The rigidity of the intermediate base 6 is much easier to provide than the base 10, since the distance between the force sensors and the positioners, for example, measures 2 and 7, is small, so you can reduce the mass of the intermediate base to 0.1 machine mass. The upper mass limit of the intermediate base 6 is 0.7 machine mass.

The proposed technical solution makes it possible to use for the measurements the existing workshops of the enterprises instead of the device of special bases and improves the measurement accuracy of dynamic loads, which allows reducing the safety factors when calculating the building structures on which the vibroactive equipment is installed.

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Claims (1)

Invention Formula An apparatus for measuring dynamic loads acting on a machine base, comprising three-component force sensors and a measuring device supported by the base, characterized in that, in order to improve the measurement accuracy by eliminating the effect of gyroscopic moments, active vibration isolators are inserted into it - positioners with absolute linear displacement parameter sensors, rigid intermediate base connected to the machine through three-component force sensors, and with a base through active vibration isolators-p iodioners, while the outputs of the displacement sensors are connected to the control inputs of active vibration isolators and positioners, and the mass of the intermediate base is 0.1-0.7 of the mass of the machine.