RU2687891C1 - Instrument for measurement force and measurement heads error monitoring - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and can be used for verification of measuring heads of various types of both Russian and foreign production. In order to solve the task, the invention proposes a device for control of measuring force and error of measuring heads, consisting of a housing, a support heel, a bracket and a guide, on housing of device there is additional flexible plate with strain gage located on it, bracket is made with possibility of movement along vertical axis by means of micrometer screw driven by step electric motor, support heel is made with possibility of fixation by means of solenoid and rod.

EFFECT: technical problem is increase of efficiency and expansion of control area of operations performed during verification of measuring heads.

1 cl, 1 dwg

Description

The invention relates to measuring equipment and can be used for calibration of measuring heads of various types of both Russian and foreign production. The proposed technical solution can be used when performing calibration work in metrological organizations.

The prior art design of devices that monitor the error of the measuring heads by moving the movable reference heel of the device.

A device is known for calibrating and calibrating indicators and calipers [Patent for utility model RU No. 177,502 “A device for calibrating indicators and calipers,” announced on 05.22.2017]. The device consists of a base and a solid U-shaped frame. A horizontal movable carriage is installed on the frame in the slot; it is equipped with a device for micro-feeding, with a hole for lever-toothed indicators; clamping device for nutromerov indicator and removable mounting feet. A disadvantage of the known device is the lack of a readout device and an automated protocol output, which leads to a decrease in performance.

Known device PPI-50 for calibration of dial gauges [Description of the type of measuring instruments No. 48167-11, Instruments for calibration of indicators PPI-50]. The device is a computerized place of the verifier and consists of a comparator with a digital camera, a lighting device, a personal computer, a printer and equipment for calibration. The disadvantage of the device is the absence of an electric drive for moving the mobile heel and, therefore, there is no possibility to implement automation of the measurement process, and also does not allow verification of all operations according to the current regulatory documents of the Russian Federation.

The closest in technical essence and the achieved result is a device for determining the error of the measuring heads of foreign production Mahr Optimar 100 [Description of the type of measuring instruments No. 369393-08, Instruments for calibration of measuring heads and sensors Optimar 100, Mahr GmbH]. The device is an automated place for calibration of inductive and incremental sensors, as well as digital measuring heads. The device consists of a housing, a measuring panel, a vertical guide for installing and adjusting the height of the measuring heads, as well as an electronic handwheel for controlling the movement. The movement of the measuring quill is carried out using the engine or manual control. The disadvantage of this device is the lack of a system for monitoring the measuring force. The lack of a digital camera reduces the accuracy of reference when calibrating the dial gauge heads.

The technical challenge is to increase productivity and expand the scope of control operations carried out during calibration of the measuring heads.

To solve this task, a device is proposed for monitoring the measuring force and the error of the measuring heads, consisting of a body, a support heel, a bracket and a guide, in which, according to the invention, a flexible plate with a strain gauge located on it is additionally installed on the device; vertical axis with a micrometer screw driven by a stepper motor, the support heel is designed to be fixed with the help of salt ide and rod.

From the known technical solutions, the invented Instrument for monitoring the measuring force and error of the measuring heads is characterized in that a flexible plate with a strain gauge located on it is additionally installed on the instrument case; the bracket is movable along the vertical axis using a micrometer screw driven by a stepper motor , the support heel is made with the possibility of fixation using a solenoid and a rod.

An additionally installed flexible plate on which the strain gauge is located, the bracket can be moved along the vertical axis using a micrometer screw driven by a stepper motor, and the support heel can be fixed with a solenoid and rod to increase productivity and expand the area of control operations performed when verification of measuring heads.

The invention is illustrated in FIG. 1, where:

1 - measuring head

2 - bracket

3 - guide,

4 - micrometer screw,

5 - stepper motor,

6 - linear encoder movements,

7 - supporting heel,

8 - plate

9 - load cell,

10 - housing

11 - rod

12 - solenoid,

13 - digital camera,

14 - personal computer (PC)

15 - control unit.

Monitoring the operation of determining the error of the measuring head on the proposed instrument is carried out by moving the head along the vertical axis and comparing the readings with a reference reading device.

Monitoring the operation of the measuring force of the head is carried out by comparing the force acting on the force-measuring surface when the tip of the measuring head contacts this surface.

The principle of control of the measuring force and (or) error on this measuring device is as follows - the measuring head 1 is mounted on the bracket 2, which moves along the guide 3 in a vertical position, using a micrometer screw 4. In turn, the rotation of the micrometer screw is transmitted through a stepper motor 5. The distance of movement along the vertical axis is controlled by the linear displacement encoder 6, which for less accurate measuring heads serves as a standard of length and permits It determines not only the measuring force, but also the error, the support heel 7 serves to contact the measuring head and the plate 8, on which the strain gauge 9 is installed. The plate 8 and the strain gauge 9 form a force-measuring surface and are mounted on the housing 10. To determine the error of the measuring head 1 the support heel 7 is fixed by the rod 11, which is inserted or withdrawn from the engagement by the solenoid 12. The reading from the measuring head 1 is taken with the help of the digital camera 13. The control, setting the values, control and processing ka values obtained by the control unit 14 and the personal computer 15.

When calibrating measuring heads, processing of measurement results and control of arm 2 movement are performed. When installing measuring head 1 on bracket 2, the operator commands the control of measuring force and (or) error by pressing the “MEASUREMENT”, “DEFINITION OF ERROR”, “DEFINITION OF MEASURING EFFORT” buttons on the PC monitor 14 depending on the desired operation.

Next, a command is sent from the PC 14 to the control unit 15, the stepping motor 5 is turned on, the movement of the bracket begins. At the beginning of the contact of the measuring head 1 with the support heel 7, readings are taken from the strain gauge 9 and further along the entire range.

The range of movement is controlled by the linear displacement encoder 6. Next, according to the algorithm, the characteristics of the measuring head 1 are monitored over the entire measurement range.

The measurement results are recorded in PC 14, the measurement protocol is automatically processed and the measurement protocol is generated, the result of verification is issued.

Thus, the proposed Instrument for monitoring the measuring force and the error of the measuring heads makes it possible to increase the accuracy of the performed verification operations, reduce the labor intensity and automate the measurement process, reduce the number of measuring instruments used for calibration.

Claims (1)

A device for monitoring the measuring force and the error of the measuring heads, comprising a housing, a supporting heel, a bracket and a guide, characterized in that a flexible plate with a strain gauge located on it is additionally installed on the housing of the instrument; the bracket is movable along the vertical axis using a micrometric screw, driven by a stepper motor, the support heel is made with the possibility of fixation with the help of a solenoid and a rod.

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