SU1580152A1 - Device for calibrating meter of linear displacements - Google Patents

Abstract

The invention relates to a measurement technique and can be used in mechanical engineering for the calibration of various sensors, for example eddy current sensors. The purpose of the invention is to improve the accuracy of calibration. Depending on the magnitude of the radius of the product being tested, a replaceable calibrated transducer of displacement 6 and an element 9 with a measuring surface imitating, in form and electromagnetic properties, the surface of the object being monitored are selected. The converter 6 is installed in the collet 11 of the mount 5 of the calibrated gauge. Using the reference setting unit 4, a predetermined value of the gap of the measuring surface 10 of the interchangeable element 9 with the transducer 6 is set. The measured gap on the measuring unit 7 is read. Thus, the transducer 6 is calibrated at normal temperature. By using the electric heater 14, the operating temperature is calibrated by the transmitter 6 at the selected temperature value. 1 il.

Description

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The invention relates to a measurement technique and can be used in mechanical engineering for the calibration of various sensors, for example, eddy current sensors.

The purpose of the invention is to improve the accuracy of calibration of the meter by taking into account when calibrating temperature errors.

The drawing shows the structure of the device.

The device contains a bracket 2 fixed on the base 1 with two coaxial holes 10 the initial value of the gap bz. chk mi 3, one of which is installed

The interchangeable element 9 is moved by means of the node 4 until the scale of the node 4 is set to its original, for example, zero, position. The converter 6 is freely moved in the collet 11 until its end face, which serves as one of the measuring surfaces, contacts the surface 10 of the element 9, and in this position is fixed with the help of a lock nut 15. On the measuring unit 7

node 4 - the task of reference movement, made, for example, in the form of a micrometer. In the other hole 3 there is a mounting node 5 for the calibrated gauge, in which the calibrated gauge is mounted, made in the form of, for example, a eddy current transducer 6. A replaceable element 9 is connected to the eddy current transducer 8 of the movable rod 8 of the reference setting unit 4 , made of a material with electromagnetic properties and a surface 10 simulating a controlled product. The mount 5 of the calibrated gauge contains, in its turn,

The calibration movements (bz) of the current-conducting measuring surface 10 are carried out by moving the element 9 using the node 4 to set the reference movement. The magnitude of the static displacement of the measuring surface 10 is read from the measuring unit 7 (b) - Thus, for a series of values of a given displacement (bz), the corresponding displacement values shown by the measuring block 7 are obtained and the readings of the block 7 are determined at normal temperature .

Produced by heating the converter 6 s

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An exchangeable collet 11 placed in the core with the help of the electric heater 12 up to a given temperature value in its operating conditions determines the readings errors at the selected temperature start.

Claims (1)

Invention Formula A device for calibrating a linear displacement meter, comprising a bracket mounted on the base with two coaxial holes, in one of which 12, which is attached to the bracket with a screw 13. On the housing 12 there is an adjustable electric heater 14 with a temperature meter (not shown). The collet 11 is provided with a locking nut 15. The measuring surface 10 of the element 9 can be moved a predetermined value fij from the initial position. The device works as follows. thirty Depending on the magnitude of the radius os, a unit for setting a reference product to be supervised is installed, for example, a rotor of a turbomachine, an interchangeable eddy current transducer 6 of a calibrated displacement meter and an element 9 are installed, which are installed in the attachment unit 5 with a movable rod, characterized in that, in order to increase the calibration accuracy, it is equipped with an electric heater, the calibration mounting unit and the 4th task of the reference transducer to be measured are as smenremescheni. The element 9 is fastened to the movable collet clamp, and the electrically heated rod 8, for example, with a screw (not shown on the outside surface zan) .chip clamp. the initial value of the gap bz. The interchangeable element 9 is moved by means of the node 4 until the scale of the node 4 is set to its original, for example, zero, position. The converter 6 is freely moved in the collet 11 until its end face, which serves as one of the measuring surfaces, contacts the surface 10 of the element 9, and in this position is fixed with the help of a lock nut 15. On the measuring unit 7 The calibration movements (bz) of the current-conducting measuring surface 10 are carried out by moving the element 9 using the node 4 to set the reference movement. The magnitude of the static displacement of the measuring surface 10 is read from the measuring unit 7 (b) - Thus, for a series of values of a given displacement (bz), the corresponding displacement values shown by the measuring block 7 are obtained and the readings of the block 7 are determined at normal temperature . Produced by heating the converter 6 s : ,, jtJ. By using an electric heater 12 to a predetermined temperature value in its operating conditions, the readings of the readings are determined at a selected temperature reading. A moving rod with a movable rod, in the other - a mounting node of a calibrated meter, characterized in that, in order to improve the calibration accuracy, it is equipped with an electric heater, the mounting block of a calibrated meter is designed as shifts