Inner bore measuring head inherent geometrical parameter calibration method based on laser triangulation

A technology of laser triangulation and calibration method, which is applied in the field of calibration of the inherent geometric parameters of the inner hole probe, can solve the problems of eccentricity and difficulty in ensuring coplanarity, and achieve the effects of easy processing, easy grasp, and flexible structure

Inactive Publication Date: 2013-12-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Due to the limitation of the size of the measured hole itself and the measurement range of the sensor, it is difficult to ensure that the axis of rotation of the sensor is coplanar with the laser beam emitted by the sensor, and there will

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  • Inner bore measuring head inherent geometrical parameter calibration method based on laser triangulation
  • Inner bore measuring head inherent geometrical parameter calibration method based on laser triangulation
  • Inner bore measuring head inherent geometrical parameter calibration method based on laser triangulation

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Embodiment Construction

[0024] Attached below Figure 2-4 The specific embodiment of the present invention is described in detail:

[0025] (1) Install the calibration piece on the three-jaw chuck of the rotary mechanism, and the rotary mechanism drives the calibration piece to rotate, so that the two measured surfaces inside the calibration piece are perpendicular to the working table;

[0026] (2) Place the probe supporting shell above the plane of the workbench through the V-shaped block, the probe should be located in the two measured surfaces of the calibration part, and control the figure 2 When the probe moves along the Z direction, observe the readings of the laser triangular displacement sensor. If there is a large change, adjust the probe on the worktable until the laser triangular displacement sensor moves along the Z axis. If the reading changes very little (for example, within 5um), it means that the rotation axis of the probe is parallel to the rotation axis of the calibration part, a...

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Abstract

The invention relates to an inner bore measuring head inherent geometrical parameter calibration method based on the laser triangulation. The inner bore measuring head inherent geometrical parameter calibration method aims to achieve precise measurement on inner bore section parameters. In the process of calibration, a movement platform and a calibration workpiece are needed, wherein the movement platform is composed of a single-rotation freedom degree and two move freedom degrees; before calibration, two faces to be measured of the calibration workpiece are adjusted to be perpendicular to a worktable plane, a measuring head axial line is adjusted to be parallel to a calibration workpiece axial line, then, rotation of a laser triangle displacement sensor is adjusted to enable a laser beam to be respectively perpendicular to the inner side face A and the inner side face B of the calibration workpiece, and the deviation distance from the measuring head rotation axial line to a sensor measurement reference face is calibrated, namely, b=(d-1 1-12)/2 through two read numbers of the sensor and the distance d between the two faces to be measured of the calibration workpiece; rotation of the sensor is adjusted to find out the minimum distance between the sensor and the two faces to be measured of the calibration workpiece, and the deviation value a between the measuring head rotation axial line and the laser beam emitted by the sensor is calibrated through the calibrated b.

Description

1. Technical field [0001] The invention relates to a method for calibrating inherent geometric parameters of an inner hole measuring head based on a laser triangulation method, which is used to realize precise measurement of inner hole section parameters. 2. Background technology [0002] Hole parts are the most commonly used parts in the field of industrial production, such as automobile engines, oil drill pipes, precision bearings, artillery barrels, etc. Whether the internal geometric parameters of hole parts are qualified has a great impact on their working performance, and they must be accurately measured . The existing measurement methods mainly include contact measurement and non-contact measurement. Contact measurement has low measurement efficiency because the sensor itself needs to be in contact with the measured surface (such as plug gauge or three-coordinate measuring machine), and it is easy to scratch the measured surface. Surface and wear sensors. The non-co...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/02
Inventor 郝娟徐春广肖定国宗亚娟盛东良孟凡武
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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