JP6821424B2 - Information processing equipment, information processing methods, and programs - Google Patents

Description

The present invention relates to an information processing device, an information processing method, and a program applicable to measurement of an inner wall of, for example, an engine cylinder.
Regarding.

Observation, inspection, and analysis of the inner wall of the cylinder provided in the cylinder block are very important in the development and production of automobile engines and the like. For example, Patent Document 1 discloses an inspection method for calculating the distribution and volume of protrusions formed on the inner wall of a cylinder in order to reduce friction with a piston, and inspecting the inner wall of the cylinder based on the distribution and volume (Patent). Reference paragraph 1 [0018] FIG. 1 etc.).

Further, as described in Patent Document 2, an oil pit that functions as a pool hole for engine oil is formed on the bore inner peripheral surface (cylinder inner wall) of the cylinder block. As a result, an amount of oil capable of forming an oil film between the piston and the piston is retained, and the sliding resistance between the cylinder inner wall and the piston can be reduced (Patent Document 2 specification paragraph [0002]. [0016] Fig. 1 etc.).

Japanese Unexamined Patent Publication No. 2007-57344 Japanese Unexamined Patent Publication No. 2005-144475

There is a need for a technique capable of measuring the surface texture of the inner wall surface of a cylinder in which the above-mentioned oil pit or the like is formed with high accuracy.

In view of the above circumstances, an object of the present invention is to provide an information processing device, an information processing method, and a program capable of measuring the surface texture of a surface to be measured in which a recess such as an oil pit is formed with high accuracy. There is.

In order to achieve the above object, the information processing apparatus according to one embodiment of the present invention includes an input unit and a setting unit.
The shape data of the surface to be measured having a plurality of recesses is input to the input unit.
The setting unit detects each of the plurality of recesses based on the input shape data, and sets a removal target area including the recesses for each of the detected recesses.

In this information processing device, each of the plurality of recesses is detected, and a removal target area is set for each recess. This makes it possible to measure the surface roughness of the region excluding the recesses with high accuracy as the surface texture of the surface to be measured.

The setting unit may set the removal target area based on the area of the detected recess.
By setting the area to be removed according to the area of the concave portion, it is possible to measure the surface roughness of the region excluding the concave portion with high accuracy.

The setting unit may set a reference figure having an area substantially equal to the area of the detected recess, and set the removal target area with reference to the dimension of the reference figure.
As a result, it is possible to set a region based on the size of the recess as the region to be removed, and it is possible to improve the measurement accuracy of the surface roughness.

The setting unit may set a region in which the recess is enlarged with the difference between the dimensions of the reference figure and the integrated value obtained by integrating the dimensions of the reference figure with a predetermined enlargement ratio as the enlargement amount as the removal target region. Good.
As a result, it is possible to set a region in which the recess is enlarged at an appropriate ratio as the region to be removed, and it is possible to improve the measurement accuracy of the surface roughness.

The reference figure is a circle having an area substantially equal to the area of the detected recess, and the dimension may be the diameter of the circle.
This makes it possible to easily set the area to be removed based on the size of the concave portion, and it is possible to improve the measurement accuracy of the surface roughness.

The reference figure is a rectangle having a width substantially equal to the width of the recess, and the dimension may be the width dimension of the rectangle.
This makes it possible to easily set the area to be removed based on the size of the concave portion, and it is possible to improve the measurement accuracy of the surface roughness.

The setting unit may set the removal target area so that the integrated value obtained by integrating the area of the detected recess with a predetermined enlargement ratio and the area of the removal target area are substantially equal to each other.
As a result, it is possible to set a region in which the concave portion is enlarged at a predetermined enlargement ratio as the region to be removed, and it is possible to improve the measurement accuracy of the surface roughness.

The setting unit may set a reference height with respect to the shape data of the surface to be measured, and may detect a portion lower than the reference height by a predetermined threshold value or more as the recess.
As a result, the recess can be detected with high accuracy.

The setting unit may expand the input shape data on a plane, set the reference height with respect to the expanded shape data, and detect the recess.
For example, when the surface to be measured is an inner wall of a cylinder or the like, the concave portion can be detected with high accuracy by expanding the shape data into a flat surface.

The reference height may be the average height of the surface to be measured calculated based on the shape data.
This makes it possible to accurately detect a portion lower than a predetermined threshold value as a recess from the average height.

The surface to be measured having the plurality of recesses may be an inner wall surface of a cylinder having a plurality of pits.
This makes it possible to measure the surface roughness of the region of the inner wall surface of the cylinder excluding the plurality of pits with high accuracy.

The surface to be measured having the plurality of recesses may be an inner wall surface of a cylinder in which a crosshatch is formed.
This makes it possible to measure the surface roughness of the region of the inner wall surface of the cylinder excluding the crosshatch with high accuracy.

The information processing apparatus may further include a measuring unit for measuring the surface roughness of a region other than the set removal target region.
As the surface texture of the surface to be measured, it is possible to measure the surface roughness of the region excluding the recesses with high accuracy.

The information processing method according to one embodiment of the present invention is an information processing method executed by a computer, and includes acquiring shape data of a surface to be measured having a plurality of recesses.
Each of the plurality of recesses is detected based on the acquired shape data, and a removal target area including the recess is set for each of the detected recesses.

A program according to an embodiment of the present invention causes a computer to perform the following steps.
A step of acquiring shape data of a surface to be measured having a plurality of recesses.
A step of detecting each of the plurality of recesses based on the acquired shape data, and setting a removal target area including the recesses for each of the detected recesses.

As described above, according to the present invention, it is possible to measure the surface texture of the surface to be measured in which recesses such as oil pits are formed with high accuracy. The effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

FIG. 1 is a diagram schematically showing the appearance of the inner wall measuring device according to the embodiment. FIG. 2 is a schematic view showing an example of the hardware configuration of the PC shown in FIG. FIG. 3 is a schematic view showing a configuration example of the probe head portion. 4A and 4B are schematic views for explaining a calculation example of shape data of the surface to be measured. FIG. 5 is a flowchart showing an example of processing for setting and removing the pit peripheral area. FIG. 6 is a diagram schematically showing an example of input shape data. 7A and 7B are diagrams schematically showing planar shape data for the inner wall surface. 8A, B and C are schematic plan views for explaining a setting example of the pit peripheral region. FIG. 9 is a schematic cross-sectional view for explaining a setting example of the pit peripheral region. FIG. 10 is a schematic view showing an enlarged example of the edge of the pit. FIG. 11 is a schematic plan view for explaining another setting example of the removal target area.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

[Configuration of inner wall measuring device]
FIG. 1 is a diagram schematically showing the appearance of the inner wall measuring device according to the embodiment of the present invention. FIG. 2 is a schematic view showing a hardware configuration example of a PC (Personal Computer) that functions as an information processing device according to the present embodiment. A computer other than a PC may be used.

As shown in FIG. 1, the inner wall measuring device 500 includes a three-dimensional coordinate measuring machine 100 and a PC 200. The three-dimensional coordinate measuring machine 100 includes a base portion 10, a three-axis moving mechanism 20, a stage 30, a head cover 40, and a probe head portion 50 (see FIG. 3). The three-axis moving mechanism 20 is supported by the base portion 10.

The 3-axis moving mechanism 20 includes an X-axis moving mechanism 21, a Y-axis moving mechanism 22, and a Z-axis moving mechanism 23. The X-axis moving mechanism 21 supports the stage 30 so as to be movable along the X direction. The Y-axis moving mechanism 22 supports the X-axis moving mechanism 21 so as to be movable along the Y direction. The Z-axis moving mechanism 23 moves the head cover 40 and the probe head portion 50 along the Z-axis direction.

By controlling the 3-axis movement mechanism 20 by the PC 200, it becomes possible to scan the probe head portion 50 within the measurement coordinate section composed of the three axes of XYZ. That is, the probe head portion 50 can be relatively moved along the three-axis directions of the XYZ orthogonal to each other with respect to the measurement object M placed on the stage 30.

The specific configuration of each of the moving mechanisms 21, 22 and 23 of the XYZ is not limited. Further, as the configuration of the 3-axis moving mechanism 20, any configuration may be adopted as long as the probe head portion 50 can be scanned along each direction of XYZ.

The three-dimensional coordinate measuring machine 100 is provided with a position detection mechanism (not shown) such as a linear encoder in each direction of XYZ. The position detection mechanism outputs data on the relative displacement and position of the probe head portion 50 with respect to the object to be measured M to the PC200.

The stage 30 has a mounting surface 31 parallel to the horizontal direction (XY plane direction). The object to be measured M is placed on the mounting surface 31. In the present embodiment, a cylinder block mounted on an automobile or the like is mounted on the mounting surface 31 as the measurement object M. By controlling the probe head portion 50 covered with the head cover 40, it is possible to measure the inner wall of the cylinder provided in the cylinder block. The probe head portion 50 will be described in detail later.

As shown in FIG. 2, the PC 200 includes a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, an input / output interface 205, and a bus 204 that connects them to each other. A display unit 206, an operation unit 207, a storage unit 208, a communication unit 209, an I / F (interface) unit 210, and the like are connected to the input / output interface 205.

The display unit 206 is a display device using, for example, a liquid crystal, EL (Electro-Luminescence), or the like. The operation unit 207 is, for example, a keyboard, a pointing device, a touch panel (integrated structure with the display unit 206), and other operation devices. The storage unit 208 is a non-volatile storage device, and for example, an HDD (Hard Disk Drive) or the like is used.

The communication unit 209 is a communication module for communicating with other devices via a network such as LAN (Local Area Network) or WAN (Wide Area Network). A communication module for short-range wireless communication such as Bluetooth (registered trademark) may be provided. Further, a communication device such as a modem or a router may be used.

The I / F unit 210 is an interface to which other devices such as a USB (Universal Serial Bus) terminal and an HDMI (registered trademark) (High-Definition Multimedia Interface) terminal and various cables are connected. The display unit 206, the operation unit 207, the communication unit 209, and the like may be connected to the PC 200 via the I / F unit 210.

In the present embodiment, the three-dimensional coordinate measuring machine 100 and the PC 200 are connected by wire or wirelessly via the communication unit 209 or the I / F unit 210. Therefore, the shape data of the surface to be measured is input from the three-dimensional coordinate measuring machine 100 to the PC 200 through these blocks.

Information processing by the PC 200 is realized, for example, by the CPU 201 loading a predetermined program stored in the ROM 202, the storage unit 208, or the like into the RAM 203 and executing the information processing. As shown in FIG. 1, in the present embodiment, the drive control unit 211, the surface measurement unit 212, and the pit peripheral area setting unit 213 are realized by the CPU 201 executing a predetermined program. Dedicated hardware may be used to implement each block.

The drive control unit 211 controls the drive of each mechanism in the three-dimensional coordinate measuring machine 100. The surface measuring unit 212 measures the surface texture and the like of the object to be measured M based on the measurement data and the like output from the three-dimensional coordinate measuring machine 100. In the present embodiment, the surface roughness of the region excluding the pit peripheral region set by the pit peripheral region setting unit 213 is measured. The pit peripheral area is an area including the oil pit and its surroundings, and corresponds to the removal target area in the present embodiment. The setting of the area around the pit will be described in detail later.

The program is installed on the PC 200, for example, via various recording media. Alternatively, the program may be installed on the PC 200 via the Internet or the like. A computer other than a PC may be used as the information processing device according to the present embodiment.

FIG. 3 is a schematic view showing a configuration example of the probe head portion 50. The probe head portion 50 includes a base portion 51, a touch probe 52, an image probe 53, and a probe support mechanism 54. The base portion 51 is connected to the Z-axis moving mechanism 23 and is moved along the Z direction. When the base portion 51 moves, the touch probe 52, the image probe 53, and the probe support mechanism 54 also move integrally.

The touch probe 52 is attached to the base portion 51 so that the stylus 56 having the tip ball 55 extends in the Z direction. The touch probe 52 is scanned with respect to the measurement object M, and the coordinate information of XYZ when the contact between the measurement object M and the tip sphere 55 is detected is calculated. Based on the calculation result, the shape, height, etc. of the measurement object M are measured. The specific configuration of the touch probe 52 is not limited, and any touch probe may be used.

The image probe 53 is attached to the base portion 51 via the probe support mechanism 54. In this embodiment, a white light interferometer is used as the image probe 53. Therefore, as shown in FIG. 3, an optical interference optical system 57 is configured in the image probe 53. The present technology can be applied even when a probe other than the white light interferometer is used as the image probe 53.

The optical interference optical system 57 is configured so that the measurement object M can be photographed with the direction parallel to the mounting surface 31 on which the measurement object M is placed (XY plane direction) as the imaging direction. That is, it is possible to measure a vertical plane parallel to the Z direction with the image probe 53. This makes it possible to measure the surface texture of the inner wall of a cylinder or the like with high accuracy.

The probe support mechanism 54 has a rotation drive unit 60 and a linear drive unit 61. The rotation drive unit 60 is rotatably arranged on the base unit 51 via, for example, a connecting member (not shown). The rotation drive unit 60 can rotate the image probe 53 with the θ-axis extending in the Z direction, which is the direction perpendicular to the mounting surface 31, as the rotation axis. The specific configuration of the rotary drive unit 60 is not limited, and is composed of, for example, a drive source such as a motor, a rotary member that transmits rotational torque, and the like.

The linear drive unit 61 is attached to the rotary drive unit 60, and the image probe 53 can be moved along the W axis extending in one direction. The image probe 53 is attached to the linear drive unit 61 so that the direction of the photographing optical axis is equal to the direction of the W axis. Therefore, the linear drive unit 61 makes it possible to move the image probe 53 along the photographing direction. The specific configuration of the linear drive unit 61 is not limited, and may be arbitrarily designed.

FIG. 4 is a schematic diagram for explaining a calculation example of shape data of the surface to be measured by the three-dimensional coordinate measuring machine 100. Hereinafter, the measurement object M will be described as a cylinder block W. The surface to be measured is the inner wall surface 71 of the cylinder 70 included in the cylinder block W.

The cylinder block W is measured by the touch probe 52. As a result, the height of the upper surface of the cylinder block W, the center position C of each cylinder 70, the inner diameter, and the like are measured. As shown in FIG. 4A, the image probe 53 is moved so that the focal position P of the image probe 53 is arranged at a predetermined measurement point U on the inner wall surface 71 based on the offset amounts of both probes. .. The offset amount can be calculated in advance using, for example, a calibration jig or the like.

The specific method of moving the image probe 53 is not limited. For example, the image probe 53 is arranged at the center position C of the cylinder 70, and the rotation drive unit 60 rotates so that the W axis extends toward the measurement point U. Then, the linear drive unit 61 moves the image probe 53 to a predetermined W coordinate position on the W axis so that the image probe 53 is in focus toward the measurement point U.

As shown in FIG. 4A, the image probe 53 is scanned along the W axis. Further, as shown in FIG. 4B, the image probe 53 is also scanned in the rotation direction of the rotation drive unit 60. This makes it possible to calculate the shape data of the region centered on the measurement point U of the inner wall surface 71. For example, a range to be measured is specified in advance, and point cloud data for the specified range is calculated as shape data.

In the present embodiment, the touch probe 52 and the image probe 53 capable of photographing in the XY plane direction are arranged on the base portion 51. The image probe 53 is rotated about the Z direction by the rotation drive unit 60. Further, the linear drive unit 61 moves the vehicle along the shooting direction. This makes it possible to calculate the shape data of the inner wall surface 71 of the cylinder 70 or the like with high accuracy.

[Area around the pit]
On the inner wall surface 71 of the cylinder 70, a plurality of oil pits (hereinafter, simply referred to as pits) are formed, for example, composed of porous holes (dents) of about 10 μm to several hundred μm. As a requirement for measuring the surface texture of the inner wall surface 71, in addition to measuring the number and shape of pits, measurement of the surface roughness of a flat region where pits are not formed can be mentioned. When the surface roughness is measured for the entire inner wall surface 71, the pit portion is analyzed as the roughness, so that accurate data cannot be obtained. In the present embodiment, as described below, a pit peripheral area including a pit and a peripheral area thereof is set, and the pit peripheral area is appropriately removed.

FIG. 5 is a flowchart showing an example of processing for setting and removing the pit peripheral area. First, the shape data of the inner wall surface 71 having a plurality of pits is input (step 101).

FIG. 6 is a diagram schematically showing an example of input shape data. For example, the three-dimensional coordinate measuring machine 100 calculates the shape data D1 for a specified range centered on the measurement point U set on the inner wall surface 71, and inputs the shape data D1 to the PC200. As shown in FIG. 6, when the shape data D1 for the designated range is combined along the circumferential direction of the inner wall surface 71, the shape data D2 for one circumference at a predetermined height of the inner wall surface 71 is obtained.

The surface measuring unit 212 shown in FIG. 1 expands the shape data D2 for one round into a plane, and the plane shape data D3 is generated. The generated plane shape data D3 is input to the pit peripheral area setting unit 213, and the setting and removal of the pit peripheral area are executed. By expanding to the plane shape data D3, it is possible to set and remove the pit peripheral region with high accuracy. The pit peripheral area setting unit 213 may execute the expansion to the plane shape data D3.

The method of developing the planar shape data D3 is not limited, and any technique may be used. For example, it is possible to generate the plane shape data D3 based on the inner diameter and curvature of the inner wall surface 71. In that case, by using the measured values measured by the touch probe 52 and the image probe 53, the planar shape data D3 can be generated with high accuracy.

FIG. 7 is a diagram schematically showing the planar shape data D3. FIG. 7B is a cross-sectional view taken along the line AA of FIG. 7A. The Z'direction in the figure is the height direction with respect to the plane shape data D3. The height of each point (measurement point) of the plane shape data D3 is a value corresponding to the measurement value in the W direction shown in FIG.

A plurality of pits 75 on the inner wall surface 71 are detected based on the plane shape data D3 (step 102). In the present embodiment, the reference height H and the threshold value T are set, and the portion lower than the reference height H by the threshold value T or more is detected as the pit 75. Therefore, a portion lower than the plane parallel to the XY'plane direction, which is set to a height lower than the reference height H by the threshold value T, is detected as the pit 75. This makes it possible to detect the pit 75 with high accuracy.

As the reference height H, for example, the average height of the entire plane shape data D3 is used. Of course, the present invention is not limited to this, and the average of the plane shape data D3 after the filter processing or the like is executed may be used. Alternatively, the reference height H may be specified by an operator or the like. In addition, any method may be adopted. The magnitude of the threshold value T is not limited and may be set arbitrarily.

A pit peripheral area 80 is set for each of the detected pits 75 (step 103). 8 and 9 are schematic views for explaining a setting example of the pit peripheral region 80. FIG. 8 is a plan view of the pit 75, and FIG. 9 is a cross-sectional view of the pit 75. In FIG. 9, the shape of the pit 75 is simplified for the sake of clarity.

As shown in FIG. 8A, a reference circle O1 having an area substantially equal to the area of the detected pit 75 is set. Assuming that the diameter of the reference circle O1 is the pit diameter L, the pit peripheral region 80 is set with the pit diameter L as a reference. As shown in FIG. 9, the width of the cross section of the actual pit 75 and the pit diameter L are not necessarily limited to the same case.

The area of the pit 75 can be calculated using, for example, a well-known technique. For example, when point cloud data arranged at equal intervals on the XY'plane is used as the plane shape data D3, the area of the pit 75 is calculated by counting the number of point clouds included in the pit 75. Can be done. In addition, the area of the pit 75 may be calculated by any technique.

As shown in FIG. 8B, an arbitrary enlargement ratio is set as the peripheral removal rate E, and the peripheral removal rate E is integrated with the pit diameter L. The integrated value L × E corresponds to the diameter of the enlarged circle O2 obtained by expanding the reference circle O1 by the square value of the peripheral removal rate E. Further, the value d obtained by dividing the value obtained by subtracting the pit diameter L from the integrated value L × E shown in FIG. 8B by 2 corresponds to the difference between the radius of the reference circle O1 and the radius of the enlarged circle O2. That is, the value d is the difference between the radius of the reference circle O1 and the integrated value obtained by integrating the peripheral removal rate E with the radius of the reference circle O1. The value d is described as an enlargement amount d using the same reference numerals.

As shown in FIG. 8C, the pit peripheral region 80 is set by enlarging the edge portion 76 (intersection with the surface set to the reference height) of the pit 75 with the enlargement amount d as a reference. The pit peripheral region 80 is typically set according to the shape of the pit 75 so as to include the entire pit 75.

FIG. 10 is a schematic view showing an example of a method of enlarging the edge 76 of the pit 75 with reference to the enlargement amount d. The main point 76P is selected from the edge 76 of the pit 75. An expansion point 80P is set by expanding the point 76P by an expansion amount d. The pit peripheral area 80 is set by connecting the expansion points 80P according to the shape of the pit 75. This makes it possible to easily set the pit peripheral region 80 according to the shape of the pit 75.

The method of expanding the edge 76 of the pit 75 is not limited, and any method may be adopted. If the expansion circle O2 includes the entire pit 75 due to the shape of the pit 75 or the like, the expansion circle O2 may be set as the pit peripheral region 80 (see, for example, FIG. 9).

As shown in FIG. 9, the size of the portion around the pit 75 that can reduce the measurement accuracy of the surface roughness of the plane region 85 often differs depending on the pit diameter L. In the method of setting the pit peripheral area 80 in the present embodiment, it is possible to set the pit peripheral area 80 of an appropriate size according to each pit diameter L. As a result, it is possible to sufficiently prevent the flat area 85 from being removed larger than necessary, and the pit 75 and a part of the portion around the pit remaining as the flat area 85. As a result, the surface roughness of the plane region 85 can be measured with high accuracy.

As another setting method of the pit peripheral area 80, the pit peripheral area 80 may be set so that the area is substantially equal to the area of the enlarged circle O2. That is, a pit peripheral area 80 having an area substantially equal to the integrated value obtained by multiplying the area of the pit 75 (the area of the reference circle O1) by the predetermined enlargement ratio (the square value of the peripheral removal rate E in the present embodiment) is set. You may. Thereby, it is possible to set a pit peripheral area 80 having an appropriate size according to the area of each pit 75 (corresponding to the pit diameter L).

The pit peripheral region 80 is removed from the planar shape data D3 (step 104). For example, the point cloud data of the pit peripheral region 80 is set as invalid data that is not used for surface roughness analysis. Alternatively, the point cloud data of the pit peripheral region 80 may be deleted from the plane shape data D3. The plane shape data D3 from which the pit peripheral region 80 is removed is output to the surface measuring unit 212, and the surface roughness is measured.

As described above, in the inner wall measuring device 500 according to the present embodiment, each of the plurality of pits 75 is detected by the PC 200, and the pit peripheral area 80 is set for each pit 75. This makes it possible to measure the surface roughness of the plane region 85 excluding the pit 75 with high accuracy as the surface texture of the inner wall surface 71. Further, since it is possible to automatically set and remove the pit peripheral region 80 for the plurality of pits 75 at one time, the time required for measuring the surface roughness can be significantly shortened. Further, as described above, since the pit peripheral region 80 can be appropriately set based on the area of the pit 75, it is possible to sufficiently improve the measurement accuracy of the surface roughness.

<Other Embodiments>
The present invention is not limited to the embodiments described above, and various other embodiments can be realized.

In the above, the case where a plurality of pits are formed as a plurality of recesses has been given as an example. Then, a reference circle was set as a reference figure for setting the removal target area (the area around the pit). As described with reference to FIGS. 8 to 10, it was possible to easily set the removal target area with the diameter of the reference circle as the dimension (size) of the reference figure. The reference figure used to set the area to be removed is not limited to a circle, and any other figure may be used.

FIG. 11 is a schematic plan view for explaining another setting example of the removal target area. As schematically shown in FIG. 11, a crosshatch (net-like groove) 90 may be formed on the inner wall of the cylinder by honing to hold oil. The present technology can also be applied by using the groove 91 of such a crosshatch as a recess.

In the example shown in FIG. 11, a reference rectangle R extending in the extending direction of the groove 91 of the crosshatch is set as the reference figure. The width dimension (size in the lateral direction substantially orthogonal to the extending direction) L of the reference rectangle R is set as the dimension of the reference figure, and the removal target area is set based on this.

The reference rectangle R is set to have an area substantially equal to the area of the groove 91 of the crosshatch. The groove 91 of the crosshatch has a shape closer to a rectangle than a circle. Therefore, a rectangle having a length substantially equal to the length of the groove 91 of the crosshatch and having a width dimension L substantially equal to the width of the groove 91 (the size in the direction substantially orthogonal to the length) can be easily used as the reference rectangle R. It is possible to set to.

As the width of the groove 91 of the crosshatch, for example, the maximum value of the width of each point in the length direction may be used, or an average value may be used. Alternatively, the width of a predetermined point (center, etc.) in the length direction may be used as the width of the groove 91 of the crosshatch. In addition, the method of setting the reference rectangle R is not limited, and for example, the area of the groove 91 of the crosshatch may be calculated and set based on the calculated value.

For the removal target area, for example, the width dimension L of the reference rectangle R shown in FIG. 11 can be set as the pit diameter L shown in FIG. 8 or the like by the same processing. For example, an enlarged rectangle is set in which the integrated value L × E obtained by integrating the peripheral removal rate E into the width dimension L of the reference rectangle R is the width dimension. The edge of the groove 91 is enlarged by dividing the width dimension of the enlarged rectangle and the value obtained by subtracting the width dimension L of the reference rectangle R by 2. This makes it possible to easily set the removal target area according to the shape of the groove 91. As described above, since the groove 91 of the crosshatch is close to a rectangle, the enlarged rectangle often includes the entire groove 91. In this case, the enlarged rectangle can be easily set as the removal target area. In addition, any method based on the width dimension L of the reference rectangle R may be adopted.

The three-dimensional coordinate measuring machine 100 and the PC 200 shown in FIG. 1 may be integrally configured. In this case, the input / output interface or the like provided in the device functions as an input unit. Of course, the input unit may be composed of software blocks.

Instead of the reference height, a height that serves as a threshold value for detecting the pit may be set. A portion lower than the threshold height is detected as a pit.

This technology can be applied to the surface to be measured other than the inner wall surface having a plurality of pits and cross hatches. That is, this technique can be applied to various shape data of the surface to be measured measured by an arbitrary measuring device different from the inner wall measuring device illustrated in FIG. 1.

For example, the surface roughness of a surface area to be measured in which a plurality of recesses are intentionally formed for a predetermined purpose, or a surface roughness of a surface to be measured in which a plurality of recesses are unintentionally formed, or the like. , It becomes possible to measure with high accuracy. Of course, a process other than the measurement of the surface roughness may be executed on the flat region. Further, a predetermined measurement or the like may be performed on the area to be removed including the recess.

It is also possible to combine at least two feature parts among the feature parts of each form described above. Further, the various effects described above are merely examples and are not limited, and other effects may be exhibited.

D1, D2, D3 ... Shape data E ... Peripheral removal rate H ... Reference height L ... Pit diameter, width dimension M ... Measurement target (cylinder block)
O1 ... Reference circle O2 ... Enlarged circle R ... Reference rectangle 70 ... Cylinder 71 ... Inner wall surface 75 ... Pit 80 ... Pit peripheral area 85 ... Plane area 100 ... Three-dimensional coordinate measuring machine 209 ... Communication unit 210 ... I / F unit 212 ... Surface measurement unit 213 ... Pit peripheral area setting unit 500 ... Inner wall measurement device

Claims (15)

An input unit for inputting shape data of the surface to be measured having a plurality of recesses,
Each of the plurality of recesses is detected based on the input shape data, and each of the detected recesses is provided with a setting unit for setting a removal target area including the recesses .
The setting unit sets a reference figure having an area substantially equal to the area of the detected recess, and sets the removal target area with reference to the dimension of the reference figure.
Information processing device. The information processing device according to claim 1 .
The information processing unit sets an area in which the recess is enlarged with the difference between the dimensions of the reference figure and the integrated value obtained by integrating the dimensions of the reference figure with a predetermined enlargement ratio as the enlargement amount as the removal target area. apparatus. The information processing device according to claim 1 or 2 .
The reference figure is a circle having an area substantially equal to the area of the detected recess, and the dimension is the diameter of the circle. The information processing device according to claim 1 or 2 .
The reference figure is a rectangle having a width substantially equal to the width of the recess, and the dimension is the width dimension of the rectangle. The information processing device according to any one of claims 1 to 4 .
The surface to be measured having the plurality of recesses is an information processing device which is an inner wall surface of a cylinder having a plurality of pits or an inner wall surface of a cylinder in which a crosshatch is formed . An input unit for inputting shape data of the surface to be measured having a plurality of recesses,
Each of the plurality of recesses is detected based on the input shape data, and each of the detected recesses is provided with a setting unit for setting a removal target area including the recesses .
The surface to be measured having the plurality of recesses is an inner wall surface of a cylinder having a plurality of pits or an inner wall surface of a cylinder in which a crosshatch is formed.
Information processing device. The information processing device according to claim 6 .
The setting unit is an information processing device that sets the removal target area so that the integrated value obtained by integrating the area of the detected recess with a predetermined enlargement ratio and the area of the removal target area are substantially equal to each other. The information processing device according to any one of claims 1 to 7.
The setting unit is an information processing device that sets a reference height for the shape data of the surface to be measured and detects a portion lower than the reference height by a predetermined threshold value or more as the recess. The information processing apparatus according to claim 8.
The setting unit is an information processing device that expands the input shape data on a plane, sets the reference height with respect to the expanded shape data, and detects the recess. The information processing device according to claim 8 or 9.
The reference height is an information processing device which is an average height of the surface to be measured calculated based on the shape data. The information processing apparatus according to any one of claims 1 to 10 , further comprising:
An information processing apparatus including a measuring unit for measuring the surface roughness of a region other than the set removal target region. Information processing method executed by a computer
An acquisition step for acquiring shape data of a surface to be measured having a plurality of recesses, and
A setting step of detecting each of the plurality of recesses based on the acquired shape data and setting a removal target area including the recesses for each of the detected recesses.
Including
In the setting step, a reference figure having an area substantially equal to the area of the detected recess is set, and the removal target area is set with reference to the dimensions of the reference figure.
Information processing method. Information processing method executed by a computer
An acquisition step for acquiring shape data of a surface to be measured having a plurality of recesses, and
A setting step of detecting each of the plurality of recesses based on the acquired shape data and setting a removal target area including the recesses for each of the detected recesses.
Including
In the acquisition step, as the shape data of the surface to be measured having the plurality of recesses, the shape data of the inner wall surface of the cylinder having a plurality of pits or the shape data of the inner wall surface of the cylinder in which the crosshatch is formed is acquired.
Information processing method. A program that causes a computer to execute an information processing method.
The information processing method is
An acquisition step for acquiring shape data of a surface to be measured having a plurality of recesses, and
A setting step of detecting each of the plurality of recesses based on the acquired shape data and setting a removal target area including the recesses for each of the detected recesses.
Including
In the setting step, a reference figure having an area substantially equal to the area of the detected recess is set, and the removal target area is set with reference to the dimensions of the reference figure.
program. A program that causes a computer to execute an information processing method.
The information processing method is
An acquisition step for acquiring shape data of a surface to be measured having a plurality of recesses, and
A setting step of detecting each of the plurality of recesses based on the acquired shape data and setting a removal target area including the recesses for each of the detected recesses.
Including
In the acquisition step, as the shape data of the surface to be measured having the plurality of recesses, the shape data of the inner wall surface of the cylinder having a plurality of pits or the shape data of the inner wall surface of the cylinder in which the crosshatch is formed is acquired.
program.