CN212205973U - Orthogonal point laser double-measuring-head pose calibration test piece - Google Patents
Orthogonal point laser double-measuring-head pose calibration test piece Download PDFInfo
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- CN212205973U CN212205973U CN202021390210.3U CN202021390210U CN212205973U CN 212205973 U CN212205973 U CN 212205973U CN 202021390210 U CN202021390210 U CN 202021390210U CN 212205973 U CN212205973 U CN 212205973U
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Abstract
The utility model discloses a test piece is markd to two gauge head position appearance of quadrature point laser, it includes three shaft section: the device comprises a clamping shaft section, a horizontal measuring head calibration shaft section and a vertical measuring head calibration shaft section; the clamping shaft section comprises a clamping prismatic surface and a positioning cylindrical surface; the horizontal measuring head calibration shaft section comprises a calibration cylindrical surface, a calibration eccentric cylindrical surface, a peripheral alignment plane, a boss type step surface, a cross-shaped groove and a peripheral calibration boss which are distributed according to the calibration station sequence; the vertical measuring head calibration shaft section comprises an annular stepped surface, a top calibration boss, a top alignment plane and a T-shaped groove; in the calibration process, the test piece can meet the calibration and calibration of a horizontal measuring head and a vertical measuring head in an orthogonal coordinate system, the test piece can effectively improve the measurement range relative to the calibration of the pose of a single measuring head, and the pitching and yawing errors in the installation process of the point laser measuring head and the calibration errors of two measuring head coordinate systems are reduced by utilizing the calibration of a plurality of characteristic surfaces.
Description
Technical Field
The utility model relates to a non-contact three-dimensional detection device's demarcation test piece, in particular to test piece is markd to two gauge head position appearance of quadrature point laser.
Background
When the three-coordinate detection device measures a workpiece for the first time, the three-coordinate detection device needs to be subjected to precision calibration, and the precision of a calibrated test piece directly influences the system precision of a coordinate system measured by the three-coordinate detection device; the traditional gantry type three-coordinate detection device adopts a contact type measurement mode, and adopts a standard ball or a standard cylinder for calibration, and in the point laser three-coordinate detection device, the calibration test piece is applied to effectively inhibit the influence of a depth of field error and an inclination angle error in laser triangulation on calibration precision, and the calibration errors of pitching and deflection errors and two measuring head coordinate systems in the installation process of the point laser measuring head are reduced by utilizing a plurality of characteristic surfaces for calibration.
For a single measuring head pose calibration piece, in the measuring process, the calibration work of a peripheral measuring coordinate system or a top measuring coordinate system can only be met, the simultaneous calibration cannot be carried out, and the workpiece detection efficiency is obviously reduced.
The patent CN201920346069 can only calibrate a single-laser measuring head three-coordinate detection device, and cannot be applied to a measurement scene in which top feature plane detection needs to be performed on a workpiece to be detected; the device has no clamping surface fixed in the detection device, and extra system precision errors can be introduced in the calibration process; the method has no test characteristics of the origin after the measuring head coordinate system is calibrated, so that the calibration error of the measuring head origin cannot be reflected.
SUMMERY OF THE UTILITY MODEL
The utility model provides a test piece is markd to two gauge head position appearance of quadrature point laser.
The clamping shaft section (I) is positioned at the end part of the calibrated test piece in the-Z direction and comprises a positioning cylindrical surface (101) and a clamping prismatic surface (102); the axis of the positioning cylindrical surface (101) is coincident with the Z axis of the test piece coordinate system, and the distance between the end surface of the positioning cylindrical surface and the XOY reference surface of the test piece coordinate system is a known fixed value; the clamping prismatic surface (102) is an attraction surface of the calibration test piece fixed on the detection device, and the axis of the clamping prismatic surface is coincident with the Z axis of the test piece coordinate system.
The horizontal measuring head calibration shaft section (II) consists of a calibration eccentric cylindrical surface (201), a calibration cylindrical surface (202), a peripheral alignment plane (203), a boss type stepped surface (204), a cross-shaped groove (205), a peripheral calibration boss (206) and a horizontal calibration sheet (207); the calibration eccentric cylindrical surface (201) is positioned at the upper part of the clamping shaft section (I), and the axis of the calibration eccentric cylindrical surface deviates from a known fixed value along the direction of the test piece coordinate system X, Y to form a calibrated inspection characteristic surface of the horizontal measuring head coordinate system; the calibration cylindrical surface (202) is positioned at the upper part of the calibration eccentric cylindrical surface (201), and the axis of the calibration cylindrical surface is superposed with the Z axis of the test piece coordinate system to form a calibrated inspection characteristic surface of the horizontal measuring head coordinate system; the peripheral alignment plane (203) is positioned at the upper part of the calibration cylindrical surface (202) and is vertical to the boss type step surface (204), the distance from the peripheral alignment plane (203) to the Z axis of the test piece coordinate system is a known fixed value, two points with known spacing distance are detected in the X direction of the peripheral alignment plane (203) in the calibration process, the rotation alignment angle of the calibration test piece around the Z axis is calculated by utilizing the position difference value of the two points fed back by the horizontal measuring head (401), and the calibration characteristic of the Y axis linear zero position of the horizontal measuring head coordinate system is formed; each step surface of each boss type step surface (204) is parallel to each other, the relative distance is known, the transverse right-angle edge and the longitudinal right-angle edge of each boss type step surface (204) are perpendicular to each other, and in the transverse and longitudinal detection process of the horizontal measuring head (401) on the boss type step surfaces (204), if the horizontal measuring head (401) has pitching and yawing angles, the position difference fed back by the horizontal measuring head (401) on the three step surfaces is unequal to the design value of the boss type step surfaces (204), so that the pitching and yawing angle errors of the installation of the horizontal measuring head (401) are reflected; the plane where the cross-shaped groove (205) is located and the peripheral alignment plane (203) are symmetrical relative to a sample coordinate system XOZ reference plane, the cross-shaped groove (205) is symmetrical relative to a sample coordinate system YOZ reference plane, the cross section of the cross-shaped groove is rectangular, the symmetrical plane of a horizontal groove of the cross-shaped groove is superposed with the sample coordinate system XOY reference plane, the groove width of the cross-shaped groove (205) is a known fixed value and is larger than the maximum light spot size in the measuring range of the horizontal measuring head (401), and in the detection process, the transverse and longitudinal right-angle edges of the cross-shaped groove (205) can trigger the sudden change of the measuring value of the horizontal measuring head to form the calibration characteristic of the axial zero position of the horizontal measuring head coordinate system X, Z; the plane where the peripheral calibration boss (206) is located and the boss type step surface (204) are symmetrical about a reference plane of a test piece coordinate system YOZ, the center of the peripheral calibration boss (206) is overlapped with an X axis of the test piece coordinate system, a top characteristic surface of the peripheral calibration boss is parallel to a reference plane of a test piece coordinate system XOY, the length, the width and the height of the peripheral calibration boss (206) are known characteristic values, the horizontal calibration sheets (207) are fixed on four characteristic surfaces of the peripheral calibration boss (206) in two groups, each group is composed of two sheets and is symmetrically distributed about the peripheral calibration boss (206), calibration end surfaces of the four horizontal calibration sheets (207) are parallel to the top characteristic surface of the peripheral calibration boss (206), the distances of the calibration end surfaces are equal and are known fixed values, if an original point calibration of the horizontal measuring head (401) has an error, the horizontal measuring head (401) can delay or receive a setting mutation triggered by the horizontal calibration sheet (207) in advance in the transverse and longitudinal detection processes of the peripheral calibration boss (, therefore, the calibration error of the origin of the horizontal measuring head (401) is reflected, and the inspection characteristic of the origin after the horizontal measuring head coordinate system is calibrated is formed.
The vertical measuring head calibration shaft section (III) is positioned at the upper part of the horizontal measuring head calibration shaft section (II) and consists of an annular stepped surface (301), a top calibration boss (302), a top alignment plane (303), a T-shaped groove (304) and a vertical calibration sheet (305); if the calibrated test piece has a deflection angle in the Z-axis direction, the vertical measuring head (402) detects two points of known distances along the Y-direction of the test piece coordinate system, and performs secondary detection in the-X direction at the detection starting point and the detection end point until the horizontal right-angle edge of the T-shaped groove (304) triggers mutation, and if the secondary detection distance between the starting point and the detection end point has a position difference, the rotary alignment angle of the Z axis can be calculated through the position difference and the known distance of the primary detection; the plane of the T-shaped groove (304) is superposed with the top alignment plane (303), the cross section of the T-shaped groove is rectangular, the T-shaped groove (304) is symmetrical about a XOZ reference plane of a test piece coordinate system, the symmetrical plane of a horizontal groove of the T-shaped groove (304) is superposed with a YOZ reference plane of the test piece coordinate system, the groove width of the T-shaped groove (304) is a known fixed value and is larger than the maximum light spot size in the measurement range of the vertical measuring head (402), and the right-angled edge of the T-shaped groove (304) can trigger the sudden change of the measurement value of the vertical measuring head (402) in the horizontal and longitudinal detection processes of the vertical measuring head (402) to form the calibration characteristic of the axial zero position of the vertical measuring head coordinate system X, Y; each step surface of the circular ring type step surface (301) is parallel to each other, the relative distance is known, in the process that the vertical measuring head (402) transversely and longitudinally detects the circular ring type step surface (301), if the vertical measuring head (402) has a pitching angle and a deflection angle, the position difference fed back by the vertical measuring head (402) on the three step surfaces is unequal to the design value of the circular ring type step surface (301), and therefore the pitching angle and the deflection angle of the vertical measuring head (402) are reflected; the center of the top calibration boss (302) is coincident with the Z axis of the test piece coordinate system, the length, the width and the height of the top calibration boss are known characteristic values, the vertical calibration sheets (305) are fixed on four characteristic surfaces of the top calibration boss (302) in two groups, each group is composed of two sheets and is symmetrically distributed about the top calibration boss (302), the calibration end surfaces of the four vertical calibration sheets (305) are parallel to the top alignment plane (303), the distances of the calibration end surfaces are equal and are known fixed values, if an error exists in the original point calibration of the vertical measuring head (402), the vertical measuring head (402) can delay or receive a set mutation triggered by the vertical calibration sheet (305) in the horizontal and longitudinal detection processes of the top calibration boss (302), so that the calibration error of the original point of the vertical measuring head (402) is reflected, and the inspection characteristic of the original point after the vertical measuring head coordinate system is calibrated is formed.
The thickness of the horizontal calibration sheet (207) is equal to the diameter of a light spot at the focus of the horizontal measuring head (401), the thickness of the vertical calibration sheet (305) is equal to the diameter of the light spot at the focus of the vertical measuring head (402), and calibration sheets with different thicknesses can adapt to point laser measuring heads with different models.
The periphery alignment plane (203), the boss type step surface (204), the cross-shaped groove (205) and the periphery calibration boss (206) of the horizontal measuring head calibration shaft section (II) are distributed at intervals of 90 degrees according to the station sequence in the calibration process.
The calibration test piece combines a horizontal measuring head calibration shaft section (II) and a vertical measuring head calibration shaft section (III) on the same shaft, and the axis of a calibration cylindrical surface (202) of the horizontal measuring head calibration shaft section (II) is superposed with the axes of the vertical measuring head calibration shaft section (III) and the clamping shaft section (I); the origin of the coordinate system is at the intersection point of the axis of the calibration cylindrical surface (202) and the horizontal symmetry plane of the cross-shaped groove (205); at least two prism surfaces of the clamping prism surface (102) are parallel to a plane where the boss type step surface (204) or the peripheral calibration boss (206) is located;
the horizontal symmetry intersection point department of coordinate system origin at calibration cylinder (202) axis and "cross" word groove (205), coordinate system Z axle axis and calibration cylinder (202), annular ladder face (301) axis coincidence point, directional top alignment plane (303) place direction is coordinate system Z axle positive direction, coordinate system Y axle axis perpendicular to peripheral alignment plane (203), directional peripheral alignment plane (203) place direction is coordinate system Y axle positive direction, the coordinate system accords with right hand coordinate system rule.
Drawings
Fig. 1 is an axis mapping diagram i of an orthogonal point laser double-measuring-head pose calibration test piece, fig. 2 is an axis mapping diagram ii of an orthogonal point laser double-measuring-head pose calibration test piece, fig. 3 is a vertical measuring head calibration schematic diagram, and fig. 4 is a horizontal measuring head calibration schematic diagram.
The graphical representation is: i-clamping shaft section, II-horizontal measuring head calibration shaft section, III-vertical measuring head calibration shaft section, 101-positioning cylindrical surface, 102-clamping prismatic surface, 201-calibration eccentric cylindrical surface, 202-calibration cylindrical surface, 203-peripheral alignment plane, 204-boss step surface, 205- 'cross' -shaped groove, 206-peripheral alignment boss, 207-horizontal calibration sheet, 301-circular ring step surface, 302-top calibration boss, 303-top alignment plane, 304- 'T' -shaped groove, 305-vertical calibration sheet, 401-horizontal measuring head and 402-vertical measuring head.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is made with reference to the accompanying drawings;
the utility model provides a test piece is markd to two gauge head position appearance of quadrature point laser which characterized in that, it includes clamping shaft section (I), horizontal gauge head mark shaft section (II), vertical gauge head mark shaft section (III).
The clamping shaft section (I) is positioned at the end part of the calibrated test piece in the-Z direction and comprises a positioning cylindrical surface (101) and a clamping prismatic surface (102); the axis of the positioning cylindrical surface (101) is coincident with the Z axis of the test piece coordinate system, and the distance between the end surface of the positioning cylindrical surface and the XOY reference surface of the test piece coordinate system is a known fixed value; the clamping prismatic surface (102) is an attraction surface of the calibration test piece fixed on the detection device, and the axis of the clamping prismatic surface is coincident with the Z axis of the test piece coordinate system.
The horizontal measuring head calibration shaft section (II) consists of a calibration eccentric cylindrical surface (201), a calibration cylindrical surface (202), a peripheral alignment plane (203), a boss type stepped surface (204), a cross-shaped groove (205), a peripheral calibration boss (206) and a horizontal calibration sheet (207); the calibration eccentric cylindrical surface (201) is positioned at the upper part of the clamping shaft section (I), and the axis of the calibration eccentric cylindrical surface deviates from a known fixed value along the direction of the test piece coordinate system X, Y to form a calibrated inspection characteristic surface of the horizontal measuring head coordinate system; the calibration cylindrical surface (202) is positioned at the upper part of the calibration eccentric cylindrical surface (201), and the axis of the calibration cylindrical surface is superposed with the Z axis of the test piece coordinate system to form a calibrated inspection characteristic surface of the horizontal measuring head coordinate system; the peripheral alignment plane (203) is positioned at the upper part of the calibration cylindrical surface (202) and is vertical to the boss type step surface (204), the distance from the peripheral alignment plane (203) to the Z axis of the test piece coordinate system is a known fixed value, two points with known spacing distance are detected in the X direction of the peripheral alignment plane (203) in the calibration process, the rotation alignment angle of the calibration test piece around the Z axis is calculated by utilizing the position difference value of the two points fed back by the horizontal measuring head (401), and the calibration characteristic of the Y axis linear zero position of the horizontal measuring head coordinate system is formed; each step surface of each boss type step surface (204) is parallel to each other, the relative distance is known, the transverse right-angle edge and the longitudinal right-angle edge of each boss type step surface (204) are perpendicular to each other, and in the transverse and longitudinal detection process of the horizontal measuring head (401) on the boss type step surfaces (204), if the horizontal measuring head (401) has pitching and yawing angles, the position difference fed back by the horizontal measuring head (401) on the three step surfaces is unequal to the design value of the boss type step surfaces (204), so that the pitching and yawing angle errors of the installation of the horizontal measuring head (401) are reflected; the plane where the cross-shaped groove (205) is located and the peripheral alignment plane (203) are symmetrical relative to a sample coordinate system XOZ reference plane, the cross-shaped groove (205) is symmetrical relative to a sample coordinate system YOZ reference plane, the cross section of the cross-shaped groove is rectangular, the symmetrical plane of a horizontal groove of the cross-shaped groove is superposed with the sample coordinate system XOY reference plane, the groove width of the cross-shaped groove (205) is a known fixed value and is larger than the maximum light spot size in the measuring range of the horizontal measuring head (401), and in the detection process, the transverse and longitudinal right-angle edges of the cross-shaped groove (205) can trigger the sudden change of the measuring value of the horizontal measuring head to form the calibration characteristic of the axial zero position of the horizontal measuring head coordinate system X, Z; the plane where the peripheral calibration boss (206) is located and the boss type step surface (204) are symmetrical about a reference plane of a test piece coordinate system YOZ, the center of the peripheral calibration boss (206) is overlapped with an X axis of the test piece coordinate system, a top characteristic surface of the peripheral calibration boss is parallel to a reference plane of a test piece coordinate system XOY, the length, the width and the height of the peripheral calibration boss (206) are known characteristic values, the horizontal calibration sheets (207) are fixed on four characteristic surfaces of the peripheral calibration boss (206) in two groups, each group is composed of two sheets and is symmetrically distributed about the peripheral calibration boss (206), calibration end surfaces of the four horizontal calibration sheets (207) are parallel to the top characteristic surface of the peripheral calibration boss (206), the distances of the calibration end surfaces are equal and are known fixed values, if an original point calibration of the horizontal measuring head (401) has an error, the horizontal measuring head (401) can delay or receive a setting mutation triggered by the horizontal calibration sheet (207) in advance in the transverse and longitudinal detection processes of the peripheral calibration boss (, therefore, the calibration error of the origin of the horizontal measuring head (401) is reflected, and the inspection characteristic of the origin after the horizontal measuring head coordinate system is calibrated is formed.
The vertical measuring head calibration shaft section (III) is positioned at the upper part of the horizontal measuring head calibration shaft section (II) and consists of an annular stepped surface (301), a top calibration boss (302), a top alignment plane (303), a T-shaped groove (304) and a vertical calibration sheet (305); if the calibrated test piece has a deflection angle in the Z-axis direction, the vertical measuring head (402) detects two points of known distances along the Y-direction of the test piece coordinate system, and performs secondary detection in the-X direction at the detection starting point and the detection end point until the horizontal right-angle edge of the T-shaped groove (304) triggers mutation, and if the secondary detection distance between the starting point and the detection end point has a position difference, the rotary alignment angle of the Z axis can be calculated through the position difference and the known distance of the primary detection; the plane of the T-shaped groove (304) is superposed with the top alignment plane (303), the cross section of the T-shaped groove is rectangular, the T-shaped groove (304) is symmetrical about a XOZ reference plane of a test piece coordinate system, the symmetrical plane of a horizontal groove of the T-shaped groove (304) is superposed with a YOZ reference plane of the test piece coordinate system, the groove width of the T-shaped groove (304) is a known fixed value and is larger than the maximum light spot size in the measurement range of the vertical measuring head (402), and the right-angled edge of the T-shaped groove (304) can trigger the sudden change of the measurement value of the vertical measuring head (402) in the horizontal and longitudinal detection processes of the vertical measuring head (402) to form the calibration characteristic of the axial zero position of the vertical measuring head coordinate system X, Y; each step surface of the circular ring type step surface (301) is parallel to each other, the relative distance is known, in the process that the vertical measuring head (402) transversely and longitudinally detects the circular ring type step surface (301), if the vertical measuring head (402) has a pitching angle and a deflection angle, the position difference fed back by the vertical measuring head (402) on the three step surfaces is unequal to the design value of the circular ring type step surface (301), and therefore the pitching angle and the deflection angle of the vertical measuring head (402) are reflected; the center of the top calibration boss (302) is coincident with the Z axis of the test piece coordinate system, the length, the width and the height of the top calibration boss are known characteristic values, the vertical calibration sheets (305) are fixed on four characteristic surfaces of the top calibration boss (302) in two groups, each group is composed of two sheets and is symmetrically distributed about the top calibration boss (302), the calibration end surfaces of the four vertical calibration sheets (305) are parallel to the top alignment plane (303), the distances of the calibration end surfaces are equal and are known fixed values, if an error exists in the original point calibration of the vertical measuring head (402), the vertical measuring head (402) can delay or receive a set mutation triggered by the vertical calibration sheet (305) in the horizontal and longitudinal detection processes of the top calibration boss (302), so that the calibration error of the original point of the vertical measuring head (402) is reflected, and the inspection characteristic of the original point after the vertical measuring head coordinate system is calibrated is formed.
The thickness of the horizontal calibration sheet (207) is equal to the diameter of a light spot at the focus of the horizontal measuring head (401), the thickness of the vertical calibration sheet (305) is equal to the diameter of the light spot at the focus of the vertical measuring head (402), and calibration sheets with different thicknesses can adapt to point laser measuring heads with different models.
The periphery alignment plane (203), the boss type step surface (204), the cross-shaped groove (205) and the periphery calibration boss (206) of the horizontal measuring head calibration shaft section (II) are distributed at intervals of 90 degrees according to the station sequence in the calibration process.
The calibration test piece combines a horizontal measuring head calibration shaft section (II) and a vertical measuring head calibration shaft section (III) on the same shaft, and the axis of a calibration cylindrical surface (202) of the horizontal measuring head calibration shaft section (II) is superposed with the axes of the vertical measuring head calibration shaft section (III) and the clamping shaft section (I); the origin of the coordinate system is at the intersection point of the axis of the calibration cylindrical surface (202) and the horizontal symmetry plane of the cross-shaped groove (205); at least two prism surfaces of the clamping prism surface (102) are parallel to a plane where the boss type step surface (204) or the peripheral calibration boss (206) is located;
the horizontal symmetry intersection point department of coordinate system origin at calibration cylinder (202) axis and "cross" word groove (205), coordinate system Z axle axis and calibration cylinder (202), annular ladder face (301) axis coincidence point, directional top alignment plane (303) place direction is coordinate system Z axle positive direction, coordinate system Y axle axis perpendicular to peripheral alignment plane (203), directional peripheral alignment plane (203) place direction is coordinate system Y axle positive direction, the coordinate system accords with right hand coordinate system rule.
The above is only the preferred embodiment of the present invention. All equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. An orthogonal point laser double-measuring-head pose calibration test piece is characterized by comprising a clamping shaft section (I), a horizontal measuring-head calibration shaft section (II) and a vertical measuring-head calibration shaft section (III);
the clamping shaft section (I) is positioned at the end part of the calibration test piece coordinate system in the Z-axis negative direction and comprises a positioning cylindrical surface (101) and a clamping prismatic surface (102); the axis of the positioning cylindrical surface (101) is superposed with the axis of the Z axis of the test piece coordinate system, and the distance between the end surface of the positioning cylindrical surface and the XOY reference surface of the test piece coordinate system is a known fixed value; the clamping prismatic surface (102) is an attraction surface for fixing the calibration test piece on the detection device, and the axis of the clamping prismatic surface is superposed with the axis of the Z axis of the test piece coordinate system;
the horizontal measuring head calibration shaft section (II) consists of a calibration eccentric cylindrical surface (201), a calibration cylindrical surface (202), a peripheral alignment plane (203), a boss type stepped surface (204), a cross-shaped groove (205), a peripheral calibration boss (206) and a horizontal calibration sheet (207); the calibration eccentric cylindrical surface (201) is positioned at the upper part of the clamping shaft section (I), and the axis of the calibration eccentric cylindrical surface deviates from a known fixed value along the direction of the test piece coordinate system X, Y; the calibration cylindrical surface (202) is positioned at the upper part of the calibration eccentric cylindrical surface (201), and the axis of the calibration cylindrical surface is superposed with the Z axis of the test piece coordinate system to form a calibrated inspection characteristic surface of the horizontal measuring head coordinate system;
the peripheral alignment plane (203) is positioned at the upper part of the calibration cylindrical surface (202) and is vertical to the boss type step surface (204), the distance from the peripheral alignment plane (203) to the Z axis of the test piece coordinate system is a known fixed value, two points with known spacing distance are detected in the X direction of the peripheral alignment plane (203) in the calibration process, the rotation alignment angle of the calibration test piece around the Z axis is calculated by utilizing the position difference value of the two points fed back by the horizontal measuring head (401), and the calibration characteristic of the Y axis linear zero position of the horizontal measuring head coordinate system is formed; each step surface of each boss type step surface (204) is parallel to each other and has a known relative distance, and the transverse right-angle edge and the longitudinal right-angle edge of each boss type step surface (204) are vertical to each other; the plane where the cross-shaped groove (205) is located and the peripheral alignment plane (203) are symmetrical relative to a sample coordinate system XOZ reference plane, the cross-shaped groove (205) is symmetrical relative to a sample coordinate system YOZ reference plane, the cross section of the cross-shaped groove is rectangular, the symmetrical plane of a horizontal groove of the cross-shaped groove is superposed with the sample coordinate system XOY reference plane, the groove width of the cross-shaped groove (205) is a known fixed value and is larger than the maximum light spot size in the measuring range of the horizontal measuring head (401), and in the detection process, the transverse and longitudinal right-angle edges of the cross-shaped groove (205) can trigger the sudden change of the measuring value of the horizontal measuring head to form the calibration characteristic of the axial zero position of the horizontal measuring head coordinate system X, Z; the plane where the peripheral calibration boss (206) is located and the boss type step surface (204) are symmetrical about a YOZ reference plane of a test piece coordinate system, the center of the peripheral calibration boss (206) is overlapped with an X axis of the test piece coordinate system, a top characteristic plane of the peripheral calibration boss is parallel to an XOY reference plane of the test piece coordinate system, and the length, the width and the height of the peripheral calibration boss (206) are known characteristic values;
the vertical measuring head calibration shaft section (III) is positioned at the upper part of the horizontal measuring head calibration shaft section (II) and consists of an annular stepped surface (301), a top calibration boss (302), a top alignment plane (303), a T-shaped groove (304) and a vertical calibration sheet (305); if the calibrated test piece has a deflection angle in the Z-axis direction, the vertical measuring head (402) detects two points of known distances along the Y-direction of the test piece coordinate system, and performs secondary detection in the-X direction at the detection starting point and the detection end point until the horizontal right-angle edge of the T-shaped groove (304) triggers mutation, and if the secondary detection distance between the starting point and the detection end point has a position difference, the rotary alignment angle of the Z axis can be calculated through the position difference and the known distance of the primary detection; the plane of the T-shaped groove (304) is superposed with the top alignment plane (303), the cross section of the T-shaped groove is rectangular, the T-shaped groove (304) is symmetrical about a XOZ reference plane of a test piece coordinate system, the symmetrical plane of a horizontal groove of the T-shaped groove (304) is superposed with a YOZ reference plane of the test piece coordinate system, the groove width of the T-shaped groove (304) is a known fixed value and is larger than the maximum light spot size in the measurement range of the vertical measuring head (402), and the right-angled edge of the T-shaped groove (304) can trigger the sudden change of the measurement value of the vertical measuring head (402) in the horizontal and longitudinal detection processes of the vertical measuring head (402) to form the calibration characteristic of the axial zero position of the vertical measuring head coordinate system X, Y; each step surface of the circular ring type step surface (301) is parallel to each other and the relative distance is known; the center of the top calibration boss (302) is coincident with the Z axis of the test piece coordinate system, and the length, the width and the height of the top calibration boss are known characteristic values.
2. An orthogonal point laser double measuring head pose calibration test piece according to claim 1, characterized in that the thickness of the horizontal calibration sheet (207) is equal to the diameter of a light spot at the focus of the horizontal measuring head (401), the thickness of the vertical calibration sheet (305) is equal to the diameter of a light spot at the focus of the vertical measuring head (402), and calibration sheets with different thicknesses can adapt to different types of point laser measuring heads.
3. The orthogonal point laser double measuring head pose calibration test piece according to claim 1, wherein the peripheral alignment plane (203), the boss type step surface (204), the cross-shaped groove (205) and the peripheral calibration boss (206) of the horizontal measuring head calibration shaft section (II) are distributed at intervals of 90 degrees according to the station sequence in the calibration process.
4. The orthogonal point laser double measuring head pose calibration test piece according to claim 1, wherein a horizontal measuring head calibration shaft section (II) and a vertical measuring head calibration shaft section (III) are combined on the same shaft, and the axis of a calibration cylindrical surface (202) of the horizontal measuring head calibration shaft section (II) is coincident with the axis of the vertical measuring head calibration shaft section (III) and the axis of a clamping shaft section (I).
5. The orthogonal point laser double measuring head pose calibration test piece according to claim 1, wherein at least two prism surfaces of the clamping prism surface (102) are parallel to a plane where the boss step surface (204) or the peripheral calibration boss (206) is located.
6. The orthogonal point laser double-gauge-head pose calibration test piece according to claim 1, wherein the horizontal calibration sheets (207) are fixed on four feature surfaces of the peripheral calibration boss (206) in two groups, each group is composed of two sheets and is symmetrically distributed about the peripheral calibration boss (206), calibration end surfaces of the four horizontal calibration sheets (207) are parallel to a top feature surface of the peripheral calibration boss (206), distances between the calibration end surfaces and the top feature surface are equal and are fixed values, if an error exists in the origin calibration of the horizontal gauge head (401), the horizontal gauge head (401) can receive a set sudden change triggered by the horizontal calibration sheet (207) in a delayed or advanced manner in the transverse and longitudinal detection processes of the peripheral calibration boss (206), so that a calibration error of the origin of the horizontal gauge head (401) is reflected, and an inspection feature of the origin after the origin calibration of a horizontal gauge head coordinate system is formed.
7. The orthogonal point laser double-gauge-head pose calibration test piece according to claim 1, wherein the vertical calibration sheets (305) are fixed on four feature surfaces of the top calibration boss (302) in two groups, each group is composed of two sheets and is symmetrically distributed about the top calibration boss (302), calibration end surfaces of the four vertical calibration sheets (305) are parallel to the top alignment plane (303), distances between the calibration end surfaces and the top alignment plane (303) are equal and are fixed values, if an error exists in the calibration of the origin of the vertical gauge head (402), the vertical gauge head (402) can receive a set sudden change triggered by the vertical calibration sheet (305) in a delayed or advanced manner in the horizontal and longitudinal detection processes of the top calibration boss (302), so that the calibration error of the origin of the vertical gauge head (402) is reflected, and an origin inspection feature after the calibration of a vertical gauge head coordinate system is formed.
8. The orthogonal point laser double measuring head pose calibration test piece according to claim 1, wherein the origin of the coordinate system is at the intersection point of the axis of the calibration cylindrical surface (202) and the horizontal symmetrical plane of the cross-shaped groove (205), the axis of the coordinate system Z axis is coincident with the axis of the calibration cylindrical surface (202) and the axis of the circular ring type stepped surface (301), the direction of the pointing top alignment plane (303) is the positive direction of the coordinate system Z axis, the axis of the coordinate system Y axis is perpendicular to the peripheral alignment plane (203), the direction of the pointing peripheral alignment plane (203) is the positive direction of the coordinate system Y axis, and the coordinate system conforms to the rule of a right-hand coordinate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021390210.3U CN212205973U (en) | 2020-07-15 | 2020-07-15 | Orthogonal point laser double-measuring-head pose calibration test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021390210.3U CN212205973U (en) | 2020-07-15 | 2020-07-15 | Orthogonal point laser double-measuring-head pose calibration test piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795644A (en) * | 2020-07-15 | 2020-10-20 | 四川大学 | Orthogonal point laser double-measuring-head pose calibration test piece |
| CN112629439A (en) * | 2021-01-04 | 2021-04-09 | 四川大学 | Fixed gantry type orthogonal double-laser measuring head measuring method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795644A (en) * | 2020-07-15 | 2020-10-20 | 四川大学 | Orthogonal point laser double-measuring-head pose calibration test piece |
| CN111795644B (en) * | 2020-07-15 | 2024-04-16 | 四川大学 | Positive intersection point laser double-measuring head pose calibration test piece |
| CN112629439A (en) * | 2021-01-04 | 2021-04-09 | 四川大学 | Fixed gantry type orthogonal double-laser measuring head measuring method |
| CN112629439B (en) * | 2021-01-04 | 2024-04-09 | 四川大学 | Fixed gantry type orthogonal double-laser measuring head measuring method |
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