JP6956611B2 - Measuring method, correction amount setting method of measuring device and measuring device - Google Patents

Description

The present invention relates to a measuring method, a method for setting a correction amount of a measuring device, and a measuring device.

Conventionally, in a measuring device, a correction calculation is performed on a measured value of a measurement object (work) according to a measurement environment or a correction amount according to the measurement object.
For example, in Patent Document 1, in order to correct a detection error at the time of edge detection by an image measuring machine, the distance between a pair of edges facing each other is measured by the image measuring machine, and the difference between the measured value and the true value is obtained. The bias correction amount is calculated based on this. Using this bias correction amount, the detection point correction amount, which is the correction amount in each direction at the edge detection point detected by scanning the object to be measured by the image measuring machine, is calculated, and the edge is calculated based on the detection point correction amount in each direction. The correction amount used for the correction of the detection point is specified, and the edge detection point is corrected using this correction amount.

In the dimension measurement of a work using an image measuring machine, after the work is installed on the stage, the work is irradiated with illumination light from various light sources, the irradiated work is imaged by a camera, and then the measurement is performed based on the captured image. It is carried out. If the thickness of the workpiece to be measured is more than a certain level, the luminous flux when forming an image may be kicked (shadowed). When the luminous flux is kicked, the image formation at the edge of the work becomes even darker. In such a situation, the measured value measured from the image may be measured as a value larger than the true value of the work.
To solve such problems, measure the dimensions of the workpiece using a measuring means other than the image measuring machine, for example, a measuring tool such as a micrometer, determine the reference dimensions from the measurement results, and set the values at the time of image measurement. The difference between and the reference dimension can be used as the correction amount. By correcting the measured value using such a correction amount, it is possible to improve the accuracy of the dimensional measurement.

By preparing such a correction amount in advance for each type of work, it is possible to refer to the correction amount according to the type at any time when measuring the work.
By setting such a correction amount as a preset in the image measuring machine, it can be repeatedly referred to as a correction amount when a plurality of workpieces of the same type are measured.

Japanese Unexamined Patent Publication No. 2016-191579

When a correction amount for each type of work as described above is prepared and referred to each time of measurement, there is a problem that it takes time for the user to search for a corresponding correction amount from a plurality of correction amounts.
Further, if the user erroneously selects the correction amount of different types of workpieces and presets them in the image measuring machine, there is a problem that appropriate correction is not performed in the subsequent measurement.
Further, the workpieces having the same shape may not be of the same type (for example, the materials are different), and there is a possibility that the correction amount of the workpieces having different materials may be erroneously selected due to the similarity in shape. In such a case, since the reflected light when the work is irradiated is also different, there is a problem that erroneous detection of the edge portion occurs and the accuracy of the dimensional measurement is lowered.

An object of the present invention is to provide a measuring method, a method for setting a correction amount of a measuring device, and a measuring device capable of easily selecting an appropriate correction amount from a plurality of correction amounts prepared in advance.

The measuring method of the present invention is a measuring method for measuring a work using a measuring device, in which a set of a correction amount of the work and a design value of the work is stored for each type of the work, and the above-mentioned The work is measured by a measuring device, the set including the design value close to the obtained measured value is detected, the detected set is displayed and the user selects the set, and the set is included in the selected set. It is characterized in that the measured value is corrected by using the correction amount.

In the present invention, the correction amount for each type of work is the measured value of the work obtained by measuring the work with the measuring device used for the measurement and the work measured with high accuracy by using a measuring means different from this measuring device. It is desirable to calculate based on the difference from the true value of.
In the present invention, the determination of the approximation between the measured value and the design value is performed by setting an approximation range with reference to one of the measured value and the design value and determining whether or not the other value falls within the same range. be able to.
In the present invention, the storage of a set including the correction amount for each type of work, the calculation of the measured value of the work, the detection and display of the set close to the measured value, and the correction of the measured value by the selected correction amount are performed by the measuring device. It is desirable to be performed in the control device.

In the present invention, a correction amount is prepared in advance for each type of work, and when measuring the work, the correction amount corresponding to the type can be referred to at any time, and the measurement can be performed by using an appropriate correction amount. High accuracy can be achieved.
When selecting one of the correction amounts for each type of work, by measuring the work to be measured, a set candidate including the correction amount corresponding to the work is detected based on the measured value. It is displayed and the user can select one from the display.
For this reason, it is possible to eliminate the complexity of the user searching for a correction amount corresponding to the work currently being measured from among many correction amounts, and it is also possible to reduce the possibility of making a mistake in selection, so that an appropriate correction amount can be obtained. Easy to choose.

In the measurement method of the present invention, when displaying the set and letting the user select it, it is preferable to display the information of the set and the goodness of fit between the set and the work to be measured.

In the present invention, when selecting a set, the user can more easily and surely make the selection by recognizing the goodness of fit.
In the present invention, the goodness of fit between the set and the work to be measured indicates, for example, the probability of mutual relation between the work corresponding to the set and the work currently being measured in terms of shape, dimensions, and other attributes. The evaluation function may be set, or the goodness-of-fit information may be set together with respect to the relationship with other workpieces when the set is prepared in advance.

In the measurement method of the present invention, the selected correction amount is preset, and the measurement value is repeatedly measured and the preset correction amount is used to repeatedly measure the measurement value and correct the preset correction amount for the work of the same type as the selected work but different. It is preferable to do so.

In the present invention, the previously selected correction amount can be repeatedly used for the subsequent measurement of the same type of work, and the measurement can be made more efficient.

In the method of setting the correction amount of the measuring device of the present invention, the correction amount of the work is stored for each type of the work, and the measured value when the work is measured is corrected by the correction amount corresponding to the work. In the correction amount setting method, the correction amount is stored in the measuring device together with the design value of the work for each type of the work, the work is measured by the measuring device, and the obtained measurement is performed. The set including the design value close to the value is detected, the detected set is displayed and the user selects the set, and the correction amount included in the selected set is set for the correction of the measured value. It is characterized by that.

According to the present invention, as described in the measurement method of the present invention described above, an appropriate correction amount can be easily selected.

The measuring device of the present invention includes an input / output device that can be operated by a user, a measuring unit that measures a work and detects a measured value, and a work candidate that is presumed to be the work currently being measured based on the measured value. A work candidate detection unit to be detected, a work selection unit that displays the work candidate on the input / output device and allows the user to select one, a correction amount table in which a correction amount corresponding to the work is stored, and the correction. It is characterized by having a correction calculation unit that corrects the measured value by using the correction amount corresponding to the work selected by the work selection unit among the correction amounts stored in the quantity table.

In the present invention, the measured value of the work can be obtained by the measuring unit, and the measured value can be corrected by the correction calculation unit with reference to the correction amount stored in the correction amount table.
The correction amount used in the correction calculation unit can be selected by the user in the work selection unit. Further, when selecting the user, even if the correction amount stored in the correction amount table is large, the work candidate detection unit can narrow down the selection.
That is, the work candidate detection unit detects a work candidate that is presumed to be the work currently being measured based on the measured value, and the work candidate is displayed by the work selection unit on the input / output device, and the user can use any of the displays from the display. Can be selected.
For this reason, it is possible to eliminate the complexity of searching for a correction amount corresponding to the work currently being measured from among many correction amounts, and also reduce the possibility of making a mistake in selection, making it easy to obtain an appropriate correction amount. You can choose.

The measuring device of the present invention has a goodness-of-fit calculation unit for calculating the goodness of fit between the measured value and the design value of the work candidate, and the work selection unit displays information on the work candidate together with the goodness of fit. It is preferable to let the user select.

In the present invention, when selecting any of the work candidates, the user can more easily and surely make the selection by recognizing the goodness of fit.

The measuring device of the present invention has a correction amount preset for storing the correction amount, and the work selection unit corresponds to the selected work when the user selects one of the work candidates. It is preferable that the amount is read from the correction amount table and stored in the correction amount preset, and the correction calculation unit corrects the measured value with the correction amount stored in the correction amount preset.

In the present invention, the previously selected correction amount can be repeatedly used for the subsequent measurement of the same type of work, and the measurement can be made more efficient.

According to the present invention, it is possible to provide a measuring method, a method for setting a correction amount of a measuring device, and a measuring device that can easily select an appropriate correction amount from a plurality of correction amounts prepared in advance.

The block diagram which shows the structure of the measuring apparatus of one Embodiment of this invention. The schematic diagram which shows the work candidate list of the said embodiment. The schematic diagram which shows the work candidate detailed selection list of the said embodiment. The flowchart which shows the calibration operation of the said embodiment. The schematic diagram which shows the relationship of the data in the calibration operation of the said embodiment. The flowchart which shows the measurement operation of the said embodiment. The schematic diagram which shows the relationship of the data in the basic measurement operation of the said embodiment. The schematic diagram which shows the relationship of the data in the continuous measurement operation of the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the image measuring device 1 captures an image of a work 9 which is a measurement object and measures the dimensions, and includes an image measuring device 2, a control device 3, and an input / output device 4.

The image measuring machine 2 illuminates the work 9 while fixing it, shoots the work 9 and outputs it as image data to the control device 3, and each configuration in the existing image measuring machine can be used for lighting or shooting. ..
The control device 3 processes the image data obtained by the image measuring machine 2 to measure the dimensions, and has a configuration for performing a corrected measurement operation based on the present invention, which will be described later.

The input / output device 4 displays the measurement result of the control device 3 and receives operations on the control device 3 and the image measuring device 2. An existing image display panel or the like can be used for display, and a keyboard or pointing device or the like can be used for operation input.
The control device 3 and the input / output device 4 can be configured by using an existing personal computer system or the like.

The control device 3 includes an image detection unit 31, a dimension measurement unit 32, a correction calculation unit 33, and a correction amount preset 34 in order to process the above-mentioned image data and perform dimension measurement.
Of these, the image detection unit 31, the dimension measurement unit 32, and the correction calculation unit 33 are realized by executing a predetermined operation program on the computer system used as the control device 3.
Further, the correction amount preset 34 is allocated to a part of the memory area of the computer system used as the control device 3.

The image detection unit 31 processes the image data from the image measuring machine 2 to detect the image of the work 9.
The dimension measuring unit 32 measures the length, width, interval, and the like of the designated portion in the image of the work 9 detected by the image detecting unit 31, and outputs the measured value M.
The correction calculation unit 33 performs a correction calculation on the measured value M output from the dimension measurement unit 32 with reference to the correction amount C stored in the correction amount preset 34, and indicates the dimensions of the designated portion of the work 9. Output as an accurate calculated value O.

In the correction amount preset 34, the correction amount C corresponding to the work 9 is set so that an accurate correction calculation result can be obtained.
In order to make the correction amount C set in the correction amount preset 34 appropriate, the present embodiment employs a unique configuration based on the present invention.

The control device 3 has a correction amount calculation unit 41, a correction amount table 42, a product database 43, a work candidate detection unit 44, a conformity calculation unit 45, and a work as a configuration for setting the correction amount C based on the present invention. A selection unit 46 is provided.
Of these, the correction amount calculation unit 41, the work candidate detection unit 44, the goodness of fit calculation unit 45, and the work selection unit 46 are realized by executing a predetermined operation program on the computer system used as the control device 3.
Further, the correction amount table 42 and the product database 43 are allocated to a part of the memory area of the computer system used as the control device 3.
The product database 43 may be arranged in a server or the like outside the control device 3 and may be installed in a state in which the product database 43 can be referred to at any time from the control device 3.

The correction amount calculation unit 41 is activated by the calibration operation (details will be described later) in the image measuring device 1 of the present embodiment, and is set to the correction amount C (correction amount preset 34) for each type of the work 9 and used for the correction calculation. The value to be calculated) is calculated and stored in the correction amount table 42 as a set with the design value D for each type of the work 9.
When calculating the correction amount C, for example, the master work for each type of the work 9 is measured in advance by another measuring machine 8 different from the image measuring device 1 to obtain the true value T, and the same value T is obtained. The image measuring machine 2 or the dimension measuring unit 32 can acquire the measured value M with respect to the master work, and the difference between the obtained true value T and the measured value M can be taken as the correction amount C.

The correction amount table 42 stores the correction amount C for each type of the work 9 calculated by the correction amount calculation unit 41 as a set with the design value D for each type of the work 9.
The design value D of the work 9 is used as a search key when selecting any of the correction amounts C. For example, by searching for a design value D that approximates the measured value M obtained by the work 9 currently being measured and selecting a correction amount C that is set with the captured design value D, the work 9 is corrected. It can be used as the quantity C (see the measurement operation described later for details).

The product database 43 stores information on products including the work 9, and by designating the type of the work 9, a design value D for each type of the work 9 can be obtained.
The design value D obtained from the product database 43 is referred to by the correction amount calculation unit 41 described above, and is also referred to by the work candidate detection unit 44 during the measurement operation described later.

The work candidate detection unit 44 is activated by the measurement operation (details will be described later) in the image measuring device 1 of the present embodiment, and searches the product database 43 for the measured value M of the current work 9 obtained by the dimension measuring unit 32. , All the types of work 9 having a design value D close to the measured value M are detected as work candidates estimated as the work currently being measured.
The approximate design value D can be, for example, within ± 1% of the measured value M.
The work candidates may be selected by cutting or narrowing down, for example, the top three cases in which the difference between the measured value M and the design value D is small.

The goodness-of-fit calculation unit 45 calculates the goodness-of-fit F for the work 9 for the work candidates detected by the work candidate detection unit 44.
As the goodness of fit F, an attribute that can specify the type of the work 9 such as the work 9 currently being measured, the product type of the selected work candidate, and the target part of the current measured value M can be used in any combination. For example, matching of the contour pattern of the image of the work 9 and the correlation of the information recorded in the product database 43 are determined, the ones that do not correspond to the work 9 currently being measured are excluded, and the corresponding ones have the attribute values of each attribute value. It is possible to take a difference and so on.

The work selection unit 46 causes the input / output device 4 to list the work candidates detected by the work candidate detection unit 44 together with the goodness of fit F calculated by the goodness of fit calculation unit 45. Then, by operating the input / output device 4, the user is made to select the work 9 currently being measured and the correction amount C corresponding to the work 9.
The work selection unit 46 selects one of the work candidates 9 based on the user's operation, extracts the correction amount C of the work 9 from the correction amount table 42, and sets the correction amount preset 34. ..

FIG. 2 shows an example of a work candidate list displayed on the input / output device 4 by the work selection unit 46.
In FIG. 2, a work candidate list column 51 is formed in the display window 50. A plurality of work candidates 52 are listed in the work candidate list column 51 in the vertical direction, and any work candidate can be selected on the screen by using the pointer or the like of the input / output device 4. In FIG. 2, the third work candidate is displayed in a thick frame and is currently in the selected state.

As displayed in the horizontal direction of the work candidate list column 51, each of the work candidates 52 is stored in a "label" which is a symbol for identifying the work 9, a "design value" of the work 9, and a correction amount table 42. The "correction value" which is the correction amount of the work 9 of the octopus, the "date" when the work 9 is registered, and the "comment" regarding the work 9 are recorded.
In the display window 50, a work image 53 showing the work 9 is displayed on the right side of the work candidate list column 51, and can be used for user identification.

A plurality of command buttons 54 are arranged at the lower part of the display window 50. The command button 54 is displayed by checking the command button display check box 55, and the display is deleted by unchecking the check box 55.
The command buttons 54 include an "add" button for adding a work candidate 52, a "delete" button for deleting, an "edit" button for editing, a "confirm" button for confirming the currently selected work candidate 52, and a display window 50. A "cancel" button is arranged to cancel the operation in and close the display window 50.
When the "confirm" button is pressed, a detailed selection list for selecting a work 9 represented by the selected work candidate 52 but having a different type or material is displayed.

FIG. 3 shows an example of a work candidate detailed selection list displayed on the input / output device 4 by the work selection unit 46.
In FIG. 3, a work candidate list column 61 is formed in the display window 60. A plurality of work candidates 62 are listed in the work candidate list column 61 in the vertical direction, and any work candidate can be selected on the screen by using the pointer or the like of the input / output device 4.

A work image 63, a goodness-of-fit display 64, and a property display button 65 are arranged in order from the left side of each of the work candidates 62.
The work image 63 is the same as the work image 53 displayed in the work candidate 52 of FIG. 2, and the image may be slightly different depending on the difference in material and the like.
On the goodness-of-fit display 64, the goodness-of-fit F for each work candidate calculated by the goodness-of-fit calculation unit 45 is displayed. The user can easily make a determination based on the goodness of fit F displayed on the goodness of fit display 64.
By operating the property display button 65, detailed data of the work candidate 62 and the like can be displayed in a separate window. When it is difficult to judge only by the goodness of fit F, an appropriate work candidate 62 can be selected by examining the detailed data.

In the image measuring device 1 of the present embodiment, the correction amount C for each work 9 can be set by performing the calibration operation in advance. Then, in the measurement operation for actually measuring the work 9, the basic measurement operation is first performed to set the correction amount C using one of the works 9, and then the same correction amount C is used to set the correction amount C for the plurality of works 9. The continuous measurement operation is repeated for.

FIG. 4 shows the procedure of the calibration operation in the image measuring device 1.
In the calibration operation, a master work of a specific type of the work 9 is used as the work n to be calibrated, and this work n is measured by a measuring machine 8 different from the image measuring device 1, and the true value Tn of the work n is measured. Is acquired (process S1).
Next, the same work n is attached to the image measuring device 1 (process S2), and the control device 3 is made to perform the measurement of the work n.
The control device 3 measures the measured value Mn of the work n by the image measuring machine 2 and the image detecting unit 31 or the dimension measuring unit 32 (process S3). Subsequently, the correction amount calculation unit 41 calculates the correction amount Cn of the work n from the difference between the obtained true value Tn and the measured value Mn (process S4). The obtained correction amount Cn is stored in the correction amount table 42 as a set with the design value Dn of the work n obtained from the product database 43 (process S5).
The control device 3 confirms whether or not there is another work n to be calibrated (process S6), repeats processes S1 to S5 if there is any, and ends the calibration operation if not.

FIG. 5 shows the relationship between the true value Tn and the correction amount Cn in the calibration operation.
In FIG. 5, when the work a is first calibrated, the true value Ta is obtained by the process S1 (calibration operation in FIG. 4, the same applies hereinafter), the measured value Ma is obtained by the processes S2 to S3, and the correction amount is obtained by the process S4. Ca is obtained. Then, in the process S5, the correction amount Ca related to the work a is stored as a set with the design value Da (calibration operation C1).
Similarly, for the work b, the true value Tb or the measured value Mb is obtained, and the correction amount Cb is stored as a set with the design value Db (calibration operation C2).
Further, for the work c, the true value Tc or the measured value Mc is obtained, and the correction amount Cc is stored as a set with the design value Dc (calibration operation C3).

In the image measuring device 1 of the present embodiment, the correction amount Cn (in FIG. 5) corresponding to each work n (work a, b, c, etc. in FIG. 5) is displayed on the correction amount table 42 by the calibration operation described above. Correction amounts Ca, Cb, Cc, etc.) are prepared.
Then, in the actual measurement operation, the operation shown in FIG. 6 is performed.
That is, first, the basic measurement operation (left side in FIG. 6) is performed, one of the correction amounts Cn of the work n prepared in the correction amount table 42 is selected and set in the correction amount preset 34 (this setting). Is referred to as a preset), and the continuous measurement operation (on the right side in FIG. 6) is repeated for a plurality of the same work n using the same correction amount Cn.

On the left side of FIG. 6, the procedure of the basic measurement operation in the image measuring device 1 is shown.
In the basic measurement operation, any one of the work n (correction amount Cn is undecided) to be measured is attached to the image measuring device 1 (process S11), and the control device 3 is made to measure the work n.
The control device 3 measures the measured value Mn of the work n by the image measuring machine 2 and the image detecting unit 31 or the dimension measuring unit 32 (process S12). Subsequently, the work candidate detection unit 44 detects some work n having a design value Dn close to the obtained measured value Mn as work candidates (process S13), and the goodness-of-fit calculation unit 45 detects the work. The goodness of fit F for each of n is calculated (process S14). Further, the work selection unit 46 displays a list of the work n as a work candidate together with the goodness of fit F, and waits for the user's selection (process S15).
When the user selects any work n (process S16), the control device 3 reads the correction amount Cn of the selected work n from the correction amount table 42 (process S17) and sets the correction amount preset 34. Further, the correction calculation unit 33 corrects the measured value Mn of the work n with reference to the correction amount Cn of the correction amount preset 34, and outputs it as the calculation value On (process S18).

FIG. 7 shows specific examples of the measured value M, the design value D, the goodness of fit F, the correction amount C, and the calculated value O in the basic measurement operation M1.
In FIG. 7, assuming that the work n whose correction amount Cn is undecided is the work e, for example, three designs are performed by the process S13 from the measured value Me obtained in the process S12 (basic measurement operation on the left side of FIG. 6, the same applies hereinafter). The values Da, De, and Df are detected as approximate values.
Then, the process S14 calculates the goodness of fit Fa, Fe, and Ff for the works a, e, and f having the respective design values Da, De, and Df, and after the list display by the process S15, any one of them in the process S16 ( The work e) is selected, and the correction amount Ce corresponding to the work e is read out in the process S17.
As a result, the undecided work n is identified as the work e, and the calculated value Oe (corrected measured value of the work e) is obtained by the process S18 using the correction amount Ce corresponding to the work e. The correction amount Ce referred to here is a correction amount Ce corresponding to the work e set by the basic measurement operation, and by continuing to use this correction amount Ce, the work e can be reliably corrected.

As described above, for a work whose correction amount Cn is undecided, the corresponding correction amount Cn can be set after distinguishing the work from the work n.
Further, if the correction amount Cn for the work n is appropriately selected, the measurement or correction calculation can be repeated for the same work n using the same correction amount Cn (continuous measurement operation).

On the right side of FIG. 6, the procedure of the continuous measurement operation in the image measuring device 1 is shown.
In the continuous measurement operation, another work m of the same type as the work n for which the correction amount Cn is set in the basic measurement operation (correction amount Cm has already been set) is attached to the image measuring device 1 (process S21), and is attached to the control device 3. The measurement of the work m is executed.
The control device 3 measures the measured value of the work m by the image measuring machine 2 and the image detecting unit 31 or the dimension measuring unit 32 (process S22). Further, the correction calculation unit 33 corrects the measured value Mm of the work m with reference to the correction amount Cm of the correction amount preset 34, and outputs it as the calculation value Om (process S23).
The control device 3 confirms whether or not there is another work to be measured (process S24), repeats processes S21 to S23 if there is any, and ends the continuous measurement operation if not.

FIG. 8 shows the relationship between the measured value Mm of the work m, the correction amount Cm, and the calculated value Om in the basic measurement operation M2.
In FIG. 8, the measured values are obtained in the process S21 and the process S22 (continuous measurement operation on the right side of FIG. 6, the same applies hereinafter). The correction amount Cm corresponding to the work m is set in the correction amount preset 34 by the selection in the preceding basic measurement operation.
Therefore, in the process S23, the calculated value Om of the work m corrected by the appropriate correction amount Cm corresponding to the work m can be obtained from the measured value Mm and the correction amount Cm.

According to this embodiment, the following effects can be obtained.
In the image measuring device 1 of the present embodiment, the correction amount C is prepared in advance for each type of the work 9 by the correction amount calculation unit 41 and the correction amount table 42, and the work candidate detection unit 44 or the work selection unit 46 provides the correction amount C. When measuring the work, the correction amount C according to the type can be referred to at any time, and the measurement can be made highly accurate by using an appropriate correction amount C.

When selecting any of the correction amounts C for each type of the work 9, the work 9 to be measured is measured to obtain the measured value M, and then the work candidate detection unit 44 stores the correction amount in the correction amount table 42. Any one of the set of the design value D and the correction amount C of the work 9 is detected as a work candidate, and the work selection unit 46 displays the detected work candidate, so that the user can select one from the display ( Any work and the correction amount C) corresponding to the work can be selected.
Therefore, it is possible to eliminate the complexity of the user searching for the correction amount C corresponding to the work 9 currently being measured from among the many correction amounts C, and it is possible to reduce the possibility of making a mistake in selection, which is appropriate. The correction amount C can be easily selected.

In the present embodiment, the goodness-of-fit calculation unit 45 calculates the goodness-of-fit F for the work candidates, and the work selection unit 46 also displays the goodness-of-fit F when the work 9 is selected. By recognizing the goodness of fit F, the user can more easily and surely select the work and its correction amount C.

In the present embodiment, the correction calculation unit 33 performs the correction calculation with reference to the correction amount C set in the correction amount preset 34, so that the previously selected correction amount C is used in the subsequent work 9 of the same type. It can be used repeatedly for measurement, and measurement can be made more efficient.

The present invention is not limited to the above-described embodiment, and modifications within the range in which the object of the present invention can be achieved are included in the present invention.
In the above embodiment, the product database 43 is provided as an information source of the design value D for each type of the work 9, but the product database 43 may be a data table of only the design value D, and the product including the design value D may be provided. It may be a database containing other information. The product database 43 is not limited to the one included in the control device 3, and may be installed outside and referenced by the control device 3.

The selection of the work 9 (selection of the set including the correction amount C) in the work selection unit 46 is not limited to the selection on the screen as shown in FIGS. 2 and 3, and is another selection method that can be operated by the user. May be good. Further, the work candidate selection unit 44 or the work selection unit 46 is not limited to selecting the work candidate, but the set itself including the correction amount C corresponding to the measured value M of the work 9 is detected and displayed in a list. May be good.

In the calculation of the goodness of fit F by the goodness-of-fit calculation unit 45, for example, an evaluation function indicating the probability of mutual relation between the work corresponding to the set and the work currently being measured for the shape, dimensions, and other attributes is set. Alternatively, the goodness-of-fit information may be set together with respect to the relationship with other workpieces when the set is prepared in advance.
It is not essential to use the goodness of fit F in selecting the work candidate in the present invention, and the processing of the goodness of fit F may be omitted.

In the above embodiment, the image measuring device 1 is used as the measuring device, but the present invention may be applied to a measuring device based on another measurement principle, and the correction calculation using the preset of the correction amount C may be performed. For example, the present invention can be applied.

The present invention can be used for a measuring method, a correction amount setting method for a measuring device, and a measuring device.

1 ... Image measuring device, 2 ... Image measuring machine, 3 ... Control device, 31 ... Image detection unit, 32 ... Dimension measuring unit, 33 ... Correction calculation unit, 34 ... Correction amount preset, 4 ... Input / output device, 41 ... Correction Quantity calculation unit, 42 ... correction amount table, 43 ... product database, 44 ... work candidate detection unit, 45 ... conformity calculation unit, 46 ... work selection unit, 50 ... display window, 51 ... work candidate list column, 52 ... work Candidate, 53 ... Work image, 54 ... Command button, 55 ... Command button display check box, 60 ... Display window, 61 ... Work candidate list column, 62 ... Work candidate, 63 ... Work image, 64 ... Conformity display, 65 ... Property display button, 8 ... Measuring machine, 9, a, b, c, e, n, m ... Work, C1, C2, C3 ... Calibration operation, C, Ca, Cb, Cc, Ce, Cn, Cm ... Correction amount , D, Da, Db, Dc, De, Dn ... Design value, F, Fa, Fe, Ff ... Conformity, M, Ma, Mb, Mc, Me, Mn, Mm ... Correction amount, O, Oa, Ob, Occ, Oe, On, Om ... Calculated value, T, Ta, Tb, Tc, Tn ... Correction amount, M1 ... Basic measurement operation, M2 ... Basic measurement operation.

Claims (7)

It is a measurement method that measures a workpiece using a measuring device.
A set of the correction amount of the work and the design value of the work is stored for each type of the work.
The work is measured by the measuring device, the set including the design value close to the obtained measured value is detected, the detected set is displayed and the user selects the set, and the set is included in the selected set. A measuring method characterized in that the measured value is corrected by using the correction amount. In the measurement method according to claim 1,
A measurement method comprising displaying information on the set and displaying the goodness of fit between the set and the work to be measured when the set is displayed and made to be selected by a user. In the measuring method according to claim 1 or 2.
The selected correction amount is preset,
A measuring method characterized in that the measured value is repeatedly measured and the preset correction amount is used to repeatedly measure the measured value and correct the work that is the same as the work to which the correction amount is selected but is different from the work. A correction amount setting method of a measuring device in which a correction amount of a work is stored for each type of the work, and a measured value when the work is measured is corrected by the correction amount corresponding to the work.
The correction amount is stored in the measuring device together with the design value of the work for each type of the work.
The work is measured by the measuring device, the set including the design value close to the obtained measured value is detected, the detected set is displayed and the user selects the set, and the selected set is selected. A correction amount setting method, characterized in that the included correction amount is set for correction of the measured value. I / O devices that can be operated by the user
A measuring unit that measures the workpiece and detects the measured value,
A work candidate detection unit that detects a work candidate that is presumed to be the work currently being measured based on the measured value, and a work candidate detection unit.
A work selection unit that displays the work candidates on the input / output device and allows the user to select one of them.
A correction amount table in which the correction amount corresponding to the work is stored, and
It is characterized by having a correction calculation unit that corrects the measured value by using the correction amount corresponding to the work selected by the work selection unit among the correction amounts stored in the correction amount table. measuring device. In the measuring device according to claim 5,
It has a goodness-of-fit calculation unit that calculates the goodness of fit between the measured value and the design value of the work candidate.
The work selection unit is a measuring device that displays information on the work candidate together with the goodness of fit and allows a user to select the work. In the measuring device according to claim 5 or 6.
It has a correction amount preset that stores the correction amount, and has a correction amount preset.
When the user selects one of the work candidates, the work selection unit reads the correction amount corresponding to the selected work from the correction amount table and stores it in the correction amount preset.
The correction calculation unit is a measuring device characterized in that the measured value is corrected by the correction amount stored in the correction amount preset.

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