JPH09133512A - Optical three dimensional measuring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure a to-be-measured hole, a marking line, and a three- dimensional position of an end point with high precision and workability. SOLUTION: When a central position and radius of a to-be-measured hole 11 of complete roundness are measured with a spherical probe 10 of the tip of a measuring point indicator 3, the to-be-measured hole 11 is made contact to the probe 11 of a diameter larger than it, and the positions of three or more light sources of the measuring point indicator 3 are measured, and the position of the sphere center of the probe 10 is found from the data, and the data and the radius of the probe 10 are numerically calculated, for finding the central position and radius of the to-be-measured hole 11. When a to-be-measured object is a marking line, an intersection of it or the position of the end point of a boast, as well, the sphere center position data is found with the use of the probe 10, for numerically calculating the data and the probe radius.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to two or more CCDs.
When measuring the position coordinates of various measurement targets using a portable optical three-dimensional measurement device that uses an imaging device such as a camera, and a measurement point indicator with a light source that points to the measurement point of the measurement target Regarding measurement method.

[0002]

2. Description of the Related Art As a method of measuring the three-dimensional position coordinates of an object to be measured such as an automobile body or a press die, the image data of the object to be measured taken by two or more image pickup devices is numerically calculated by a computer, and the measured object is measured. There is an optical three-dimensional measurement method for measuring the position coordinates, size, etc. In this measuring method, when the measurement target is a hole formed on the object surface, such as a marking line, or an end point such as a ridgeline of the object,
A measurement point pointing device that points the position of the measurement target to the imaging device is used. This measurement point indicator is provided with a probe that directly contacts the measurement target and a light source that emits light at three or more points. A conventional measurement method using this is shown in FIG.
This will be described with reference to FIG.

The portable optical three-dimensional measuring device shown in FIG. 11 comprises two image pickup devices, a CCD camera 6 and one measuring point indicator 3. The measurement point indicator 3 has a probe 4 at the tip of the main body that can be held by one hand, and a light source 5 such as a light emitting diode at three or more fixed locations on the rear end of the main body.

When measuring the center position and size of a measurement object, for example, a measurement object hole 2 of a perfect circle formed on the plane of the measurement object 1 with the measuring device of FIG. The relative positions of the object to be measured 1 and the two CCD cameras 6 are determined, the tip of the probe 4 of the measuring point indicator 3 is brought into contact with the inner circumference of the hole to be measured 2, and the light source 5 is placed in the field of view of the CCD camera 6. Put in. In this state, the tip of the probe 4 is traced to the inner peripheral surface of the hole 2 to be measured in the circumferential direction to move the entire measuring point indicating tool 3 in an arc, and the light source 5 at this time is imaged by the CCD camera 6. Image data from the two CCD cameras 6 is sent to a computer (not shown) to obtain three-dimensional position data of the arc of the light source 5, and from this position data, position data of the moved arc of the tip of the probe 4 is obtained. . The arc position data thus obtained corresponds to the position data of the inner circumference of the hole 2 to be measured, and the hole position of the hole 2 to be measured is corrected by correcting the inner circumference position data as necessary. The position coordinates and radius of the center are calculated.

[0005]

The work of tracing the probe tip of the measuring point indicator to the inner circumference of the hole to be measured as described above is performed so that the probe tip does not move up and down on the inner peripheral surface of the hole to be measured. It is difficult to measure the center position and size of the hole to be measured with caution, and the workability of one measurement is poor. Further, the probe tip is usually spherical, and the measurement is not possible for the measurement target hole having a hole diameter smaller than or substantially the same as the spherical diameter of the spherical probe tip.

Further, when measuring the marking line formed on the object surface and the three-dimensional position of its intersection, the needle of the measuring point pointing device having a needle tip is traced to the marking line. In this case, it is difficult to trace the tip of the probe so that it does not come off the marking line, and the reliability of the measurement result and the workability of the measurement are poor.

Further, when measuring the three-dimensional positions of the end points such as corners and ridges of the object, the probe tip of the above-mentioned measuring point indicator is brought into contact with the end point of the object. Again,
There is a problem that the tip of the probe is easily dislocated from the end point and the reliability of the measurement result is poor.

An object of the present invention is to provide a measuring method for measuring a three-dimensional position of a measuring object with high accuracy and good workability when the measuring object is a hole, a marking line, or an end point.

[0009]

SUMMARY OF THE INVENTION The present invention is an optical tertiary system having two or more imaging devices for measuring the three-dimensional position of a measuring object by using a measuring point indicator having a spherical probe and a light source of three or more points. The above-mentioned object is achieved by the following measuring method according to the type of the object to be measured, which is a measuring method using an original measuring device.

In the first measuring method, the measuring object is a hole having a diameter smaller than that of the spherical measuring element of the measuring point indicator, and the measuring element is brought into contact with the periphery of the measuring object surface where the measuring object hole is present, Obtain the surface position data of the surface to be measured with an optical three-dimensional measuring device,
In addition, the probe is inscribed in the hole to be measured, the point position data of the sphere center of the probe is obtained by an optical three-dimensional measuring device, and these two position data and the offset amount of the radius of the probe are numerically calculated. Then, the hole center position and size of the hole to be measured are measured.

The second measuring method is a case in which the measuring object is a marking line formed on the measuring surface, and the measuring point of the measuring point indicator is brought into contact with the measuring surface around the marking line to measure the measuring surface. The surface position data of is obtained by an optical three-dimensional measuring device, and a measuring aid having a ridge line part that coincides with the scribe line and a measurement auxiliary surface along this ridge line is the measurement target surface, and the ridge line part is the scribe line. Position and place the measurement point indicator along the measurement auxiliary surface of the measurement auxiliary tool while the spherical probe of the measurement point indicator is in point contact with the measurement auxiliary surface of the measurement auxiliary tool and the surface to be measured. Position data of the light source of the measuring point indicator at this time is obtained by an optical three-dimensional measuring device, and the line position data of the spherical center locus of the probe is calculated from this position data, and the surface position data Line position data, probe radius and probe center The offset amount of the distance to the measurement auxiliary surface of the measuring aid to numerical calculation, to measure the position of the scribe line of the object surface.

The third measuring method is to form a perfect circular measurement auxiliary hole having a diameter larger than that of the spherical probe of the measuring point indicator at the intersection of a plurality of marking lines formed by intersecting the measuring object surface with the measuring object surface. Place the measurement auxiliary tool on the surface to be measured with the hole center of the measurement auxiliary hole positioned right above the intersection of the marking lines,
The probe is brought into contact with the inner circumference of the auxiliary measurement hole and moved circularly.At this time, the position data of the light source of the measuring point indicator is obtained with an optical three-dimensional measuring device, and from this position data the trajectory of the center of the sphere of the probe. Is calculated, and the calculated amount of offset between the calculated circular position data and the radius of the tracing stylus is numerically calculated to measure the position of the marking line intersection of the surface to be measured.

A fourth measuring method is such that, when the measuring object is an end point such as a ridgeline of the measuring object and comes into contact with the end point of the measuring object and is positioned and installed on the measuring object, a predetermined distance from the end point of the measuring object is determined. Position a measuring aid with a perfect circular measuring aid whose center is directly above the end point of the distance, and place it on the object to be measured.Move the circle by touching the probe inside the measuring aid hole. Then, the position data of the light source of the measuring point indicator at this time is obtained by an optical three-dimensional measuring device, and the arc position data of the spherical center locus of the probe is calculated from this position data, and the calculated arc position data is The position of the end point of the measuring object is measured by numerically calculating the offset amount of the radius of the probe and the distance from the measurement assisting hole of the measuring aid to the end point of the measuring object.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Various embodiments of the measuring method of the present invention will be described below with reference to FIGS. 1 to 10. FIG.
The same or corresponding parts are denoted by the same reference symbols throughout the drawings including 1 to avoid redundant description.

FIGS. 1 (A) and 1 (B) are for explaining the first measuring method of the present invention. An optical three-dimensional measuring apparatus having the measuring point indicator 3 and the CCD camera 6 shown in FIG. The measurement target whose position is measured using is the measurement target hole 11 having a perfect circle. The measuring point indicator 3 has a spherical probe 10 at its tip.
Is provided. Although the tracing stylus 10 is shown as a hemisphere having a radius R larger than the radius of the hole 11 to be measured, it may be spherical as shown in FIG. The measurement object hole 11 is a machining reference hole or the like formed on the flat measurement object surface 13 of the measurement object 12, and the measurement of the hole center and the size (radius) of the measurement object hole 11 and the measurement point indicator 3 are shown in FIG.
The optical three-dimensional measuring device 1 is used to perform the following two steps.

First, as shown in FIG.
0 is brought into contact with the measurement target surface 13, the measurement point indicator 3 is erected on the measurement target surface 13, and the tracing stylus 10 is slid on the measurement target surface 13 around the measurement target hole 11. The light source of the measurement point indicator 3 at this time is imaged by a CCD camera, and three-dimensional surface position data of the measurement target surface 13 is obtained from the image data.

Next, as shown in FIG.
0 is inserted into the hole 11 to be measured, and the spherical surface of the probe 10 is inscribed in the upper edge of the hole 11 to be measured. While maintaining this state, or by swinging and rotating the measuring point indicator 3 around the spherical center of the probe 10, the light source of the measuring point indicator 3 is CC
An image is taken with a D camera, and three-dimensional point position data of the center of the sphere of the probe 10 is obtained from the image data.

Numerical calculation is performed by adding data of known offset amount of the radius R of the tracing stylus 10 to the surface position data and point position data obtained as described above, and the hole center position and size of the hole 11 to be measured. To measure. A specific numerical calculation example at this time will be described with reference to FIG.

By measuring the position of the measurement target surface 13 in which the measurement target hole 11 is present, the parameters of the plane [normal vector n (n _X , n _Y , n _Z ) and position vector o (o _X , o) are measured.
_Y , o _Z )] is required. On the other hand, by placing the tracing stylus 10 on the measurement target hole 11, the spherical center p of the tracing stylus 10 is measured.
(P _X , p _Y , p _Z ) is obtained. The radius R of these position data and the measuring element 10, the hole center position q of the measurement target hole 11 Request (q _X, q _Y, q _Z) and radius r _h.

That is, the hole center position q (q
To obtain _X , q _Y , q _Z ), the sphere center p (p _X ,
p _Y , p _Z ) and a hole center position q (q _X , q _Y , q _Z ) are obtained, and the measured line 13 is measured with the line.
The intersection with the plane of should be calculated. The straight line in this case has a direction vector that is a plane normal vector and a position vector that is p.
Since it can be expressed by (p _X , p _Y , p _Z ), the following equation is obtained.

[(X−p _x ) / n _X )] = [(Y−p _Y ) / n _Y )] = [(Z−p _Z ) / n _Z )] ... Therefore, X = n _X k + p _x , Y = _ny k + _py , Z = _nz k + _pz ... k: parametric variable Here, from the parameters of the measurement target surface 13, the measurement target surface 13 is expressed by the following equation.

N _x (X−o _x ) + n _y (Y−o _Y ) + n _Z (Z−o _Z ) = 0 The following equation is obtained by substituting the equation into the equation and obtaining t.

K = n (op) / │n│ ² Therefore, the hole center position q (q _X , q _Y , of the hole 11 to be measured).
q _Z ) is calculated from the equation as follows.

Q = kn + p The radius r _{h of the} hole 11 to be measured is calculated from the Pythagorean theorem as follows: r _H = [R ² − | p−q | ² ] ^1/2 = [R ² −k ² | n | ² ]
^{Calculated as 1/2} .

According to the above measuring method, if the diameter of the hole to be measured is smaller than the spherical diameter of the spherical probe of the measuring point indicator,
It is possible to measure the center position and radius of the measurement target hole only by applying the probe to the measurement target hole. In this case, since the tracing stylus is stably positioned in the measurement target hole, highly accurate measurement and measurement with good workability are possible.

Next, the second aspect of the present invention will be described with reference to FIGS.
The measurement method of is explained. The measurement target of this measurement method is a straight marking line 21 formed on the measurement target surface 13.
In this case, the three-dimensional position of the marking line 21 is measured in two steps as follows using the same measurement point indicating tool 3 and the measuring aid 22 dedicated to a straight line.

First, in the same manner as the above-mentioned first measuring method, the probe 10 of the measuring point indicator 3 is brought into contact with the measurement object surface 13 to obtain surface position data of the measurement object surface 13 having the marking line 21. . Next, as shown in FIGS. 3 and 4, the measurement auxiliary tool 22 is positioned and placed on the measurement target surface 13. The measurement assisting tool 22 is, for example, a flat plate having a straight ridge line portion 23 along the marking line 21 and a measurement assisting surface 24 along the ridge line portion 23, and the measurement target surface 1 with the ridge line portion 23 aligned with the marking line 21.
3 is placed. In this case, if the measurement target surface 13 is a magnetic surface, if the measurement auxiliary tool 22 is made of a magnet sheet, the attachment / detachment work on the measurement target surface 13 becomes easy.

When the measuring auxiliary tool 22 is placed on the measuring object surface 13, the measuring element 10 of the measuring point indicator 3 is brought into contact with the measuring object surface 13 and the measuring auxiliary surface 24, and the measuring element 10 is directly placed on the measuring auxiliary surface 24. The linear position is moved along the line, and the line position data of the light source locus of the measuring point indicator 3 at this time is obtained. From this line position data, the line position data of the center of the sphere of the probe 10 is obtained,
The three-dimensional position of the marking line 21 is measured by numerically calculating this data, the radius R of the probe 10, and the offset amount of the thickness t of the measuring aid 22. A specific numerical calculation of the above second measurement method will be described with reference to FIGS. 4 and 5.

Measure the surface 13 to be measured with the marking line 21
Parameters of the plane of the measurement target surface 13
[Normal vector n (n_X , N_Y , N_Z ) And position vector
o (o _X , O_Y , O_Z )] Is required. Also, the measurement pair
A probe is attached to the measurement assisting surface 24 of the measurement assisting tool 22 on the quadrant 13.
By tracing 10
Parameter of the straight line [direction vector l (l_X , L_Y , L
_Z ) And the position vector p (p_X, P_Y, P_Z )]
It is. These surface position data, line position data, and probe 1
From the radius R of 0 and the thickness t of the measurement aid 22, the following calculation
The position data of the marking line 21 is obtained by the formula.

Direction vector l (l
_X, using l _Y, l _Z) as it is, corrected position vector q (q _X, q _Y, obtaining the q _Z). For that purpose, first, a point s projected from the point p in FIG. 4 onto the measurement target surface 13 where the marking line 21 exists is obtained, and then a point q is obtained.
When the point s is obtained in the same manner as in the case of the first measuring method, it is obtained by the following equation.

S = kn + p k = [n (op)] / | n | ² Here, the distance between the point s and the point q is as shown in FIG.
From the Pythagorean theorem, it can be calculated by (2Rt-t ² ) ^1/2 . Therefore, an equation of a straight line passing through the points s and q is obtained. In this case, since it passes through the point s, the position vector is s, and the direction vector is perpendicular to the normal line n of the measurement target surface 13 and the direction vector l of the straight line. Therefore, the outer product of the two vectors is obtained by the following equation.

N × l = v (v _X , v _Y , v _Z ) Therefore, the equation of the straight line passing through the points s and q is as follows.

(X-s _X ) / v _X = (Y-s _Y ) / v _Y = (Z-s _Z ) / v _Z = u u: Parametric variable That is, q = uv + s, so u is obtained. Good.
To obtain u, the lengths of the points q and s are (2Rt-t ² ) ^1/2
You can use that. That is, | s−q | ² = 2Rt−t ² , and from this formula and q = uv + s, | v | ² u ² = 2Rt−t ² u = + (2Rt−t ² ) ^1/2 / (| v | ² ) ^1/2 ... Is obtained. Here, the value of u is originally two values with a sign of ±, but becomes a value of + depending on the set direction. Therefore, q corrected by substituting the value obtained by the equation into uv + s
Is obtained, the position of the marking line 21 to be measured can be obtained.

Next, a third measuring method of the present invention will be described with reference to FIGS. 6 and 7. The measurement target of this measurement method is an intersection 31 of two linear marking lines 21 formed on the measurement target surface 13. Dedicated measuring aid 3 used in this case
Reference numeral 2 is a flat plate such as a magnet sheet, for example, and has a perfect circular measurement auxiliary hole 33 penetrating in the central portion. Measurement auxiliary hole 33
The hole diameter is set to be larger than the spherical diameter of the spherical probe 10 of the measuring point indicator 3. In the case where the two marking lines 21 are orthogonal to each other, the positioning marks 34 are formed at four positions on the surface of the measurement auxiliary tool 32 which are two orthogonal lines. The extension line intersection of the positioning mark 34 coincides with the center of the measurement auxiliary hole 33.

The position of the intersection 31 is measured by the measuring aid 32 in the following manner. As shown in FIG.
A measurement aid 32 is provided on the surface 13 to be measured on which the marking line 21 is present.
The positioning mark 34 is positioned and placed right above the two marking lines 21, and the hole center of the measurement auxiliary hole 33 is aligned with the intersection 31. As shown in FIG. 7, the spherical probe 10 of the measurement point indicator 3 is attached to the measurement target surface 13 and the measurement auxiliary hole 33.
The probe 10 is moved in a circle along the inner circumference of the measurement auxiliary hole 33 by making contact with the inner peripheral surface of. Measuring point indicator 3 at this time
The circular arc position data of the circular movement of the light source is obtained, the circular arc position data of the circle through which the sphere center of the probe 10 passes is calculated from this arc position data, and the center point of the arc through which the sphere center of the probe 10 passes from this position data. Find the point position data of. Then, this point position data and the offset amount of the radius R of the tracing stylus 10 are numerically calculated to measure the three-dimensional position of the intersection 31.

Numerical calculation for measuring the position of the intersection 31 may be performed as follows. Parameters of an arc passing through the center of the sphere when tracing the tracing stylus 10 along the inner circumference of the auxiliary measurement hole 33 [normal vector n (n _X , n _Y , n _Z ) and position vector p (p
_X , p _Y , p _Z ) and radius r]. From these and the radius R of the tracing stylus 10, the vector q of the intersection 31 is obtained. If the distance corresponding to the radius R of the tracing stylus 10 is obtained from the points q and p in the direction opposite to the normal vector of the circle, the position of the intersection 31 can be obtained.

Here, the equation of the straight line passing through the point p is expressed as follows. [(X-p _x ) / n _X )] = [(Y-p _Y ) / n _Y )] = [(Z-
p _z ) / n _z )] Therefore, q = kn + p (k: parameter), and the distance between the point p and the point q is the radius R. | q−p | ² = R ² k = R / (| The expression n | ² ) ^1/2 is obtained. Here, since the value of k is k <0 depending on the set direction, the position of the intersection 31 of the marking line 21 can be obtained by these equations.

Next, a fourth measuring method of the present invention will be described with reference to FIGS. In this case, the measurement target is an edge point 41 such as a ridge or a corner of the measurement target 12 such as a rectangular block.
It is. When the end point 41 is an intersection point of two orthogonal planes of the measurement object 12, the dedicated measurement aid to be used is, for example, a first measurement aid 42 having a triangular prism shape and a second measurement aid 43 having a flat plate shape. It is a thing. Second measurement aid 43
Has a measurement assisting hole 44 having a perfect circle with a bottom at the center of the surface thereof. The hole diameter of the measurement auxiliary hole 44 is set to be larger than the ball diameter of the spherical probe 10 of the measuring point indicator 3.

As shown in FIG. 8, the extension line of one ridge line of the first measurement auxiliary tool 42 and the center line of the measurement auxiliary hole 44 of the second measurement auxiliary tool 43 are made to coincide with each other so that both measurement auxiliary tools 42, 43. Is positioned and held along two orthogonal planes of the measuring object 12, and the hole center of the measurement auxiliary hole 44 of the second measurement auxiliary tool 43 is positioned directly above the end point 41 (state of FIG. 9). Next, FIG.
As shown in 0, the measuring element 10 is brought into contact with the bottom surface and the inner peripheral surface of the measuring auxiliary hole 44, and the measuring element 10 is circularly moved along the inner peripheral surface of the measuring auxiliary hole 44. The arc position data of the light source of the tool 3 is obtained, and the point position data of the center point of the arc through which the center of the sphere of the probe 10 passes is calculated from this position data. The calculation for this calculation may be performed in the same manner as the third measurement method in FIG. 7.

The distance between the center of the measurement auxiliary hole 44 of the second measurement auxiliary tool 43 and the end point 41 is determined by the plate thickness t of the second measurement auxiliary tool 43.
Since the offset amount is obtained by subtracting the depth d of the measurement auxiliary hole 44 from the above, the tracing stylus 1 when tracing the measurement auxiliary hole 44
The three-dimensional position of the end point 41 can be obtained by obtaining the center point position data of an arc passing through the sphere center of 0 and numerically calculating the offset amount of this and the numerical value (td). That is, since | q−p | ² = (t−d + R) ² in FIG. 10, the third measurement method of FIG. 7 is obtained by obtaining the center point position data of the arc through which the spherical center of the probe 10 passes. End point 4 in the same manner as
The position of 1 is obtained.

The measuring aids used in the above second to fourth measuring methods correspond to the shape and content of the object to be measured and are not limited to the shapes shown.

[0042]

According to the measuring method of the first aspect, the hole center position and the size of the measurement target hole can be measured only by the operation of bringing the spherical probe of the measurement point indicator into contact with the measurement target hole having a smaller diameter. Since the value is calculated by numerical calculation, highly accurate measurement can be performed with good workability.

According to the measuring method of the second aspect, the three-dimensional position of the marking line can be measured simply by installing the measuring auxiliary tool along the marking line and comparing the measuring element of the measuring point indicator on the measuring auxiliary surface. Therefore, even with a thin marking line, the position of the marking line can always be measured with high accuracy and workability.

According to the measuring method of claim 3, the measuring element is traced in the measuring auxiliary hole of the measuring auxiliary tool installed on the surface to be measured without contacting the measuring element of the measuring point indicator with the intersection of the marking lines. By doing so, the position of the intersection of the marking lines can be measured, so that highly accurate measurement is always possible.

According to the measuring method of the fourth aspect, the hole center position of the measuring auxiliary hole of the measuring auxiliary tool installed on the measuring object with reference to the end points of the measuring object such as ridges and corners is used as a measuring point indicator. Since the end point position of the measurement object of the measurement object can be obtained by performing the measurement, even if the end point of the measurement object is a place where the probe of the measurement point indicator slips easily, this end point position can be easily and accurately determined. Can be measured.

[Brief description of the drawings]

FIG. 1 (A) is a perspective view of a measuring point indicator and a measuring object for explaining a first measuring method of the present invention, FIG.
FIG. 1B is a cross-sectional view when the probe of FIG. 1A is engaged with a measurement target.

2 is a reference perspective view for explaining a numerical calculation formula of a center position and a radius of a hole to be measured by the probe of FIG.

FIG. 3 is a perspective view of a measurement point indicating tool, a measurement assisting tool, and a measurement target for explaining a second measuring method of the present invention.

FIG. 4 is a perspective view of the probe and the measurement assisting tool of FIG.

FIG. 5 is a front view of the tracing stylus and measurement auxiliary tool of FIG. 3;

FIG. 6 is a perspective view of a measurement point indicating tool, a measurement assisting tool, and a measurement target for explaining a third measuring method of the present invention.

FIG. 7 is a cross-sectional view of the probe and the measurement assisting tool of FIG.

FIG. 8 is a perspective view of a measurement auxiliary tool and a measurement target for explaining a fourth measurement method of the present invention.

9 is a front view at the time of measurement with the measurement auxiliary tool and the measurement point pointing tool of the measurement target in FIG.

FIG. 10 is an enlarged front view of the main part of FIG.

FIG. 11 is a perspective view showing a conventional technique.

[Explanation of symbols]

 3 Measuring Point Indicator 5 Light Source 6 Imaging Device (CCD Camera) 10 Measuring Element 11 Measuring Target Hole 12 Measuring Target 13 Measuring Target Surface 21 Marking Line 22 Measuring Aid 23 Ridge Line 24 Measuring Aiding Surface 31 Intersection Point (of Marking Line) 32 measuring aid 33 measuring aid hole 41 end points 42, 43 measuring aid 44 measuring aid hole

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location G06T 7/00 G06F 15/62 415 (72) Inventor Yoshihide Aoki Nishiharu, Nishiharu-cho, Aichi Prefecture Okimura character Oka No. 1 Sanyo Kiko Co., Ltd. (72) Inventor Mitsutoshi Goto Okimura, Nishiharu-cho, Nishikasugai-gun, Aichi Oka No. 1 Sanyo Kiko Co., Ltd. (72) Inventor Takushi Goto Oishi-mura, Nishiharu-cho, Nishikasui-gun Aichi No. 1 in Jinoka Sanyo Kiko Co., Ltd.

Claims (4)

[Claims] 1. An optical three-dimensional measuring device having two or more image pickup devices for measuring the three-dimensional position of a measuring object by using a measuring point indicator having a spherical probe contacting the measuring object and a light source of three or more points. In the measurement method when measuring with, the measurement target is a hole with a diameter smaller than the spherical probe of the measurement point indicator,
Contact the probe around the hole on the measurement surface where this measurement hole is located, obtain surface position data of the measurement surface with an optical three-dimensional measuring device, and inscribe the probe in the measurement hole. Then, the point position data of the sphere center of the probe is obtained by an optical three-dimensional measuring device, and the offset amount of these two position data and the radius of the probe is numerically calculated, and the hole center position and size of the hole to be measured are calculated. An optical three-dimensional measuring method, which comprises: 2. An optical three-dimensional measuring device having two or more image pickup devices for measuring the three-dimensional position of a measuring object by using a measuring point indicator having a spherical probe contacting the measuring object and a light source of three or more points. In the measurement method when measuring with, the measurement target is the marking line formed on the measurement target surface, the measuring point of the measuring point indicator is brought into contact with the measuring target surface around this marking line, and the surface position of the measuring target surface Data is obtained with an optical three-dimensional measuring device, and a measuring aid having a ridge line portion that coincides with the marking line and a measuring auxiliary surface along this ridge line is placed on the surface to be measured, and the ridge portion is aligned with the marking line. Positioning and placing, move the measurement point indicator along the measurement auxiliary surface of the measurement auxiliary tool while the probe of the measurement point indicator is in point contact with the measurement auxiliary surface of the measurement auxiliary tool and the surface to be measured, The position data of the light source of the measuring point indicator at this time is converted to the optical cubic Obtained with a measuring device, and calculate the line position data of the sphere center locus of the probe from this position data, and the above-mentioned surface position data, line position data and probe radius, and the offset amount of the relative dimensional relationship between the probe and the measurement aid. An optical three-dimensional measuring method characterized by numerically calculating and measuring the position of the marking line on the surface to be measured. 3. An optical three-dimensional measuring device having two or more imaging devices for measuring the three-dimensional position of a measuring object by using a measuring point indicator having a spherical probe contacting the measuring object and a light source of three or more points. In the measurement method when measuring with, the measurement target has a perfect circular measurement auxiliary hole with a diameter larger than that of the contact point of the measurement point indicator at the intersection of the marking lines formed by intersecting the measurement target surface. Place the auxiliary tool on the surface to be measured with the hole center of the measurement auxiliary hole positioned right above the intersection of the marking lines, and move the probe circularly by contacting the probe with the inner circumference of the measurement auxiliary hole. At this time, the position data of the light source of the measuring point pointing device is obtained by the optical three-dimensional measuring device, and the arc position data which is the locus of the sphere center of the probe is calculated from this position data, and the calculated arc position data and Numerically calculate the offset amount of the radius of the child, and Optical three-dimensional measuring method characterized by measuring the position of the brat line intersections. 4. An optical three-dimensional measuring device having two or more imaging devices for measuring the three-dimensional position of a measuring object by using a measuring point indicator having a spherical probe contacting the measuring object and a light source of three or more points. In the measurement method when measuring with, the measurement target is an edge point such as a ridgeline of the measurement target, and when the measurement target is positioned and installed in contact with the end point of the measurement target, a predetermined distance from the end point of the measurement target Position the measuring aid with a perfect circular measuring auxiliary hole right above the end point of the measurement auxiliary object on the object to be measured, and move the circle by touching the probe inside the measuring auxiliary hole of this measuring auxiliary tool. , The position data of the light source of the measuring point indicator at this time is obtained by the optical three-dimensional measuring device, and the arc position data of the spherical center locus of the probe is calculated from this position data, and the calculated arc position data and the measured Radius of child and hole of measurement auxiliary hole of measurement auxiliary tool Sincerely numerical offset amount of the distance to the end point of the measurement object,
An optical three-dimensional measurement method characterized by measuring the position of an end point of a measurement object.