SU1714354A1 - Device for measuring parameters of mechanical oscillations - Google Patents

Abstract

This invention relates to a measurement technique. The aim of the invention is to improve the measurement accuracy by applying a differential measurement scheme. For this purpose, a device for measuring mechanical vibration parameters, containing two working chambers 1 and 2. Filled with working fluid, an electric displacement sensor 3 and an indicator unit 7. are additionally equipped with three electric displacement sensors, a piston pair 8 and a piston position sensor 9. Chambers 1 and 2 are interconnected through the piston cavity 10 and are made in the form of U-shaped tubular tanks, electrical displacement sensors are installed on the outer sides of the chambers in the areas of displacements of the surfaces of the working fluid, and a colloidal ferromagnet solution is used as the working fluid. 1 hp ff. 2 ill. (LCJi ^ SLZel ^ > &

Description

The invention relates to a measurement technique and can be used to measure low frequency oscillations. .

A device for measuring mechanical vibration parameters is known, comprising interconnected two fluid-filled chambers, an electrical displacement transducer and an indicator unit.

The disadvantage of this device is low measurement accuracy.

The aim of the invention is to improve the measurement accuracy by applying a differential measurement scheme.

The goal is achieved by the fact that a device for measuring mechanical vibration parameters, containing interconnected two chambers filled with working fluid, an electrical displacement transducer and an indicator unit, is equipped with three additional electrical displacement transducers, a piston pair and a piston position sensor; podpnevnevuyu cavity and made in the form of and-shaped tubular tanks, electrical displacement sensors installed on the outside of the chambers on the site ah levels displacement hydraulic fluid as the working fluid used ferromagnetic colloidal solution.

FIG. 1 is a schematic diagram of a device for measuring mechanical vibration parameters; in fig. 2 is a plan view of a device consisting of two tanks.

A device for measuring mechanical vibration parameters contains interconnected two fluid-filled chambers 1 and 2, four electrical sensors 3-6 displacements, as well as an indicator unit 7, a piston pair 8 and a piston position sensor 9. Chambers 1 and 2 are interconnected through a podporshnevoy cavity 10 and made in the form of U-shaped tubular tanks, sensors 3-6 movements installed on the outer sides of chambers 1 and 2 in the areas of movement of the working fluid levels and through amplifiers 11 and 12 are connected to block 13 signal processing , and a colloidal solution of a ferromagnet was used as a working fluid. The position sensor 9 is connected to the signal processing unit 13 via the amplifier 14.

The device works as follows.

When the object under study oscillates, on which the device for measuring parameters of mechanical oscillations is rigidly attached, for example, in the plane of the pattern, the working fluid moves in chamber 2 and its level in vertical channels changes according to the oscillation frequency of the object under study. From displacement sensors 3 and 4, electrical signals about amplitude and oscillation frequency are fed through amplifiers 11 and 12 to signal processing unit 12, where signals having a time dependence are approximated, the average frequency and the measured amplitude of oscillation, as well as its time derivative are determined. .

The received data is sent to the indicator unit 7, which can be a recorder.,

To create optimal measurement conditions depending on various environmental conditions, multivariance

the selection of working liquid is driven by a piston pair of 8 s. the possibility of fixing the position of the piston, which allows the cross-sections of the sub-axle, cavity 10, to change;

This will vary the speed of movement of the working fluid. The magnitude of the piston movement is monitored by a piston position sensor 9 located outside the pores: a screw pair 8. The signal from sensor 9 through

the amplifier 14 is supplied to the signal processing unit 13, where it makes the appropriate correction when determining the measured parameters.

As a working fluid can

for example, an electromagnetic active solution is used and, accordingly, electromagnetic sensors are used.

The device can be used to measure the vibrations of the studied

object with variable vector. For this, the structure of the device is made of several U-shaped tubular tanks connected by a piston cavity and placed relative to one another.

friend in a horizontal plane at an angle (Fig. 2). Such a design allows the measurement of complex object vibrations.

Claims (1)

An apparatus for measuring mechanical vibration parameters, comprising interconnected two fluid-filled chambers, an electrical displacement transducer and an indicator unit, characterized in that, in order to improve measurement accuracy, the apparatus is equipped with three additional electrical transducers and displacements, a piston pair and piston position sensor, chambers interconnected through the piston cavity and are made in the form of u-shaped tubular tanks, electrical displacement sensors are installed on the outer sides of the chambers in the areas of displacement of the working fluid levels, and a colloidal solution of a ferromagnet is used as the working fluid. FIG, g