SU1409858A1 - Vibrocontact instrument transducer of dimension derivations - Google Patents

Abstract

The invention relates to a measurement technique and has the purpose of raising the information content of monitoring the deviation of the dimensions of parts from nominal due to the provision of three-dimensional measurements. Used for this vibrocontact sensor measuring the deviation of dimensions contains the measuring tip 2, which is fixed tetrahedral measles

Description

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; 8 With a T-shaped nozzle 9, the excitation of mechanical oscillations of this end, which also contains two pairs of electromagnets A, ° 5, 6, and 7. When the electromagnets are pairwise excited, a vibrating probe measuring the 1st tip 2 along the axis X or V in horizontal plane, and with the simultaneous excitation of all electromagnets, the tip vibrates along the Z axis in a vertical plane. When measuring the deviations of the dimensions of the part being monitored along the Z coordinate, the output signal proportional to the amplitude of the oscillations of the tip 2 and the fixed magnet 19 fixed on it, is formed on the outputs of the measuring coil 20. When measuring the deviations of dimensions along the X coordinate, the output signal is removed from the terminals of two differentially connected coils 11 and 12, sensitive to the amplitude of oscillations of the rod magnets 15-16, and when measured along the Y coordinate - from the outlines of differentially connected coils 13 and 14, which are vibration-sensitive ti m magnets 17-18, 1 Il.

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The invention relates to a measurement technique and can be used as a three-coordinate sensor for deviations of the dimensions of parts and blanks from nominal values.

The aim of the invention is to increase the information content of the control of a two-dimensional sensor of dimensions by providing measurement of the size deviation and along the third coordinate.

The drawing shows a vibration sensor measuring the deviation of dimensions, a general view.

Vibrocontact sensor contains body 1 ,. in which measuring tip 2 is placed coaxially with it, designed for contacting one end with the surface of the test piece. The tip 2 is connected to the housing 1 by an equally rigid elastic element 3. In the housing 1, an oscillation exciter of the measuring tip 2 is installed, made in the form of four electromagnets 4-7, which are installed mutually perpendicular to the common plane. Four-sided bark 8 with a magnetic T-shaped nozzle 9 is fixed on the measuring tip 2. The planes of the edges of the core 8 are parallel to the end surface of the electromagnets of the vibration exciter. A measuring and recording unit consisting of two pairs of measuring coils 11-12 and 13-14 is placed on the housing 1 from the side of the other end 10 of the measuring tip 2,

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connected in pairs differentially and established. mutually perpendicular in a common plane, as well as two pairs of mutually perpendicular rod permanent magnets 15-16 and which are fixed at the end. 10 measuring tip and are located in a plane perpendicular to its axis. The coils 11-14 are mounted concentrically with the corresponding rod magnets 15-18. On the side of the same end 10, a permanent magnet 19 is fixed to the measuring tip 2, and an additional measuring coil 20 is mounted concentrically with it in the housing 1.

Vibration sensor-meter deviations of dimensions works as follows.

To measure the dimensions of the test piece (not shown) along one (for example, X) coordinate, the supply voltage is fed in antiphase to the windings of two oppositely placed electromagnets 5 and 7. In this case, measuring tip 2 is oscillating in a plane characterized by the X coordinate, and the corresponding (the bar magnets 15 and 16, rigidly connected to the measuring tip 2, oscillate in the same X plane. As a result, the EMFs that are algebraically summed are induced in the measuring coils 11 and 12 are are recorded and a measuring device (not

shown). The magnitude of the output voltage is proportional to the amplitude of oscillation of the measuring tip 2 When in contact with the measured surface, the amplitude of oscillation of the measuring tip will vary in proportion to the deviation of the size along the X coordinate, as a result of which the sensor output signal will change

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To measure the parameters of another (e.g., Y) coordinate, the anti-phase supply voltage is applied to another pair of electromagnets 6 and 4. Measuring tip 2 is oscillating in the Y plane, and rod magnets 17 and 18 associated with measuring tip 2, oscillate in the same plane U. In the measuring coils 13, 14 emf is induced, the magnitudes of which are proportional to the amplitude of the deviations of the measuring tip from the surface being tested, i.e. on the size of the controlled part at the coordinate Y.

In measuring the deviations of dimensions along the Z axis, the supply voltage is applied simultaneously to all four electrons of the information content of the control romagnet. At the same time, the T-shaped head is also

As 9 is periodically attracted to the ends of the electromagnets, the measuring tip 2 will oscillate along the axis of the measuring tip, i.e. Z coordinate. Due to the movement of the permanent magnet 19 along the Z coordinate, an emf is induced in the coil 20, the value of which is proportional to the amplitude of oscillation of the measuring tip 2 along the Z axis, depending on the size of the part being monitored along this coordinate. Thus, the deviations along the third coordinate,, it is equipped with a magnetic conductive l-shaped attachment fixed on the tetrahedral cortex of the exciter, an additional measuring coil installed concentrically with a permanent magnet, and two lars of mutually perpendicular rod permanent magnets mounted on the second end of the measuring tip and located in a plane perpendicular to its axis, and the four measuring rollers placed in the housing are mounted concentrically with the corresponding measurement of the deviations of erov controls:

 parts in three mutually matching rod magnets.

perpendicular coordinates increases the information content of the control.

Claims (1)

Claims of the invention A vibro-contact sensor measuring the deviations of dimensions, comprising a housing, a measuring tip arranged in it coaxially, designed to contact one of its ends with the surface of a controlled de-hoist and connected to the housing by an equally rigid elastic element, the exciter, the oscillation of the measuring pulse. , nechnika, executed in the form of four electromagnets installed mutually ;. but perpendicularly in a common plane, and a common tetrahedral core, the plane of the faces of which is parallel to the end surfaces of the electromagnets, and the measuring and recording unit, made in the form of fixed on. the second end of the measuring tip of a permanent magnet and two pairs located in the body of the measuring coils, which are differentially connected and installed mutually perpendicularly in a common plane, about tl and -; deviations along the third coordinate, it is equipped with a magnetic l-shaped nozzle attached to the four-sided cortex of the exciter, an additional measuring coil mounted concentrically with a permanent magnet, and two lars of mutually perpendicular rod permanent magnets mounted on the second end of the measuring tip and located in a plane perpendicular to its axis, and four measuring coils placed in the housing are mounted concentrically with corresponding :