TWM595214U - Size measurement apparatus - Google Patents

Abstract

A size measurement apparatus is provided. Multiple captured images are combined to form a whole-body image, size information of multiple check portions is determined according to inspection information, and whether the size information of the whole body image is conformed to the corresponding specification size is determined, so as to obtain an inspection result. The whole body includes the whole of the object under test. Each captured image is corresponding to one of capturing portions of the object under test. The inspection information includes those check portions and the corresponding specification size thereof. Accordingly, the measure and inspection procedures can be completed automatically, so as to reduce time and manpower.

Description

Dimensional measuring device

This new creation is about a detection technique, and especially about a size measurement device.

The existing size measurement technology for products has always used traditional projectors for manual measurement. It is conceivable that the measurement time of the existing measurement method is quite long, and encounters products that need to output Process Capability Index (CPK) reports (continuous measurement of 20-50 pieces (PCS)) The deviation value comparison will also take more time. Manual measurement of data, manual copying, data integration and other procedures in an infinite loop not only consume a lot of man-hours, but also cause manpower costs. If unfortunately encounters the fatigue of the inspector, it will lead to operation negligence and misjudgment. In addition, if the personnel work is stiff, it is more likely to cause rapid staff turnover and high education and training costs, which will cause the dilemma of increasing product costs.

In view of this, the new creation provides a size measurement device, which can automatically control the shooting, size measurement and verification procedures, which is not only efficient but also avoids manual problems.

The size measuring device created by the new model is used to detect the object to be measured. The size measuring device includes but is not limited to an image capturing device and a processor. The image capturing device separately shoots several shooting parts of the object to be measured to obtain multiple captured images. Each captured image is directed to a shooting part of the object to be measured. The processor is coupled to the image capture device and is configured to perform the following steps: combine those captured images into a whole image; determine the size information of several detection parts in the whole image based on the inspection information; determine the size of the whole image Whether the size information conforms to the corresponding standard sizes, and the inspection results are obtained accordingly. The overall image includes the complete test object. The inspection information includes those test parts of the analyte and corresponding specifications.

Based on the above, the size measuring device of the novel creation embodiment changes the relative position of the image capturing device and the object to be measured to form corresponding captured images for several shooting parts on the object to be measured, and combines these captured images into A whole image covering the whole object to be measured, and measuring the size information of the corresponding detection part on the whole image, and verifying the conformity with the standard size based on this. In this way, industrial products such as 88×75 mm (mm) or even larger sizes can be measured, and software and hardware controls are integrated to achieve time-saving and labor-saving effects through automated operation.

In order to make the above-mentioned features and advantages of the creation of the new model more obvious and understandable, the embodiments are specifically described below and described in detail in conjunction with the accompanying drawings.

FIG. 1 is a block diagram of components of a size measurement device 100 according to an embodiment of the present invention. Please refer to FIG. 1, the size measuring device 100 includes but is not limited to an image capturing device 110, a light source 120, a moving mechanism 130, a storage 140 and a processor 150.

The image capturing device 110 may be a device such as a camera or a video camera. The image capturing device 110 may include an image sensor (for example, a charge coupled device (Charge Coupled Device, CCD), a complementary metal oxide semiconductor (Complementary Metal-Oxide- Semiconductor, CMOS, etc.), optical lens, image control circuit and other components. In one embodiment, the lens specifications included in the image capture device 110 (eg, aperture, magnification, focal length, viewing angle, image sensor size, pixels, etc.) may be different, and the number may be based on the actual Adjust to demand.

The light source 120 may be a rotatable frame light source composed of a coaxial light source, a backlight light source, a ring-shaped light source, a bar light source, a point light source, a bar light source, or other types of light sources. In one embodiment, the number of light sources 120 may be adjusted according to actual needs, and the brightness distribution provided by these light sources 120 may also be adjusted.

The moving mechanism 130 may be a mechanical arm, a height adjustment table, a slide rail, a slide table, a turntable, a screw, a motor, or a cylinder, or other types of mechanical components that can drive the connecting element to move or rotate, or a combination thereof. In one embodiment, the moving mechanism 130 can drive the placed test object (for example, various types of products or products) to be able to move up, down, and/or rotate. For example, the moving mechanism 130 may provide a platform for placing the object under test or clamping the object under test. In another embodiment, the moving mechanism 130 is coupled to the image capturing device 110 and/or the light source 120, and enables the image capturing device 110 and/or the light source 120 to perform one axis and two axes relative to the main body of the size measuring device 100 Or more axis movements. For example, the image capturing device 110 or the light source 120 can be raised, lowered, moved, and/or rotated.

The storage 140 may be any type of fixed or removable random access memory (RAM), read only memory (Read Only Memory, ROM), flash memory (flash memory), or traditional hard disk (Hard Disk Drive, HDD), Solid-State Drive (SSD) or similar components, and used to record code, software modules (for example, shooting control module 141, image combination module 143, inspection module 145, etc.), captured images, overall images, inspection information, image recognition algorithms, image processing algorithms, size information, specification information, inspection results, drivers of mobile mechanism 130, mobile information related to mobile mechanism 130, and other data Or archives, the detailed content of which will be detailed in subsequent embodiments.

The processor 150 is coupled to the image capturing device 110, the light source 120, the moving mechanism 130, and the storage 140. The processor 150 may also be a central processing unit (CPU), microcontroller, programmable controller, special Application Integrated Circuit (Application-Specific Integrated Circuit, ASIC), chip or other similar components or a combination of the above components. In this embodiment, the processor 150 controls all operations of the size measurement device 100, for example, drives the moving mechanism 130, and controls the functions of the image capturing device 110 and the light source 120 (eg, switching, shooting, shading, at least one axis Sports, etc.). In addition, the processor 150 can access and load the software, data, or files recorded in the storage 140.

In order to facilitate the understanding of the operation flow of the novel creation embodiment, a number of embodiments will be given below to describe in detail the flow of the size measurement and inspection of the object to be measured in the novel creation embodiment. In the following, the methods described in the new creative embodiment will be described with various devices, components and modules in the size measuring device 100. The various processes of the method can be adjusted according to the implementation situation, and it is not limited to this.

FIG. 2 is a flowchart of a size measurement method according to an embodiment of the novel creation. Referring to FIG. 2, the image combining module 143 combines multiple captured images into a whole image (step S210). Specifically, each captured image is directed to one of several shooting parts of a test object. The size measuring device 100 may provide a user interface (for example, through a display) for the user to input identification information of the object to be measured (for example, part number, production number, serial number, or model number, etc.), and the processor 150 may be based on the object to be tested Download the identification information, movement information, and/or shooting parameters corresponding to the test object from the storage 140 or from the Internet.

In an embodiment, the inspection information may be the detection part of the object to be tested and the corresponding standard sizes. For example, the length, angle, radian, etc. of a specific part (ie, the detection part that needs to be inspected) in the object to be measured are used to express the shape or size. It should be noted that the standard size represents the size of the test object in a normal state (for example, it can be shipped or within the tolerance), and is related to the specification or self-defined, and its items, quantities and values can be based on the needs of the user. change. In some embodiments, the canonical size in the inspection information may come from information such as Enterprise Resource Planning (ERP) or other system editing and/or output.

In one embodiment, the movement information is related to the moving distance or direction of the movement mechanism 130, and the movement information is more related to the image capturing device 110 respectively facing each shooting part of the object to be measured (the image capturing device 110 is defined here to be measured The part where the object is shot is called the relative position of the shooting part). In other words, the mobile information is also related to how to distinguish the object to be measured into one or more shooting parts. The detection part corresponding to the inspection information corresponding to the test material of different material numbers or its shape and size are different, and the shooting control module 141 can generate movement information according to the inspection information (relative to the detection part and the shape and size of the test object). For example, the shooting part is a shooting range of 5 mm × 5 mm, and the shooting control module 141 cuts the object to be measured according to the shooting range (the shooting parts may overlap), and accordingly plans the movement path of the slide to make the test to be measured The shooting part of the object can be sequentially moved to a position that can be shot by the image capturing device 110. That is to say, the movement information is used to instruct the mobile mechanism 130 how to drive the image capturing device 110 or the object to be measured, so that the image capturing device 110 can face a certain shooting part of the object to be measured. Next, the shooting control module 141 can drive the mobile mechanism 130 to move according to the movement information, and sequentially shoot part or all of the shooting part. For example, the movement information is to translate the object to be measured by 3 cm to the left, or the image capturing device 110 to move upward by 5 cm, or it may be to move the object to be measured by 2 cm every certain time.

In one embodiment, the shooting parameters are related to the exposure time and focal length of the image capture device 110, and the light source (eg, light source type, brightness in a specific direction, or light source distribution, etc.). Different types of test objects are suitable for different shooting environments, and these shooting parameters can be defined in advance or adjusted according to the inspection results.

It can be seen that the shooting control module 141 controls the moving mechanism 130 according to the movement information, and respectively shoots one or more shooting parts of the object to be measured through the image capturing device 110 according to the shooting parameters to obtain multiple captured images. And each captured image can be directed to a shooting part of the object to be measured. For example, FIG. 3A is an example illustrating captured images CI for different shooting parts. Please refer to FIG. 3A, which shows that 30 captured images CI are shot for a certain product, and each captured image CI is for a certain shooting part.

It is worth noting that each captured image may be directed to a certain part of the object to be measured, but a single shot part does not necessarily correspond to the complete detection part in the inspection information. In one embodiment, the shooting section overlaps at least another shooting section with partial areas, and the image combination module 143 may combine those captured images into an overall image according to the overlapping partial areas of those shooting sections. In the new creative embodiment, it is defined that the overall image includes a complete object to be tested. The size and shape of the overlapping part of the shooting part can be adjusted according to actual needs. Taking FIG. 3A as an example, in the two upper left captured images CI, the right part of the leftmost captured image CI has the same content as the left side of the captured image CI on the right. The image combination module 143 can recognize the image content of the overlapping partial areas, and pair the overlapping areas in the captured images to combine to form an overall image. For example, FIG. 3B is an example illustrating the overall image WI. Please refer to FIGS. 3A and 3B. The overall image WI of FIG. 3B is formed by a combination of thirty captured images CI of FIG. 3A.

In another embodiment, the image combination module 143 can also train the recognition model of the object under test through machine learning in advance, and from this recognition model determine which part of the object under test and the position of each object to be captured, and According to the position correlation of the captured images, the whole image is combined.

It should be noted that there may be other changes in the means of image combination. For example, techniques such as image stitching and image alignment can be applied. In addition, the captured image and the overall image can be recorded in the storage 140, and can be accessed and presented by the display or other external devices to facilitate the user to view.

It can be seen from this that even if the size of the object to be measured is too large to allow the image capturing device 110 to capture the entire object to be measured at once, the novel embodiment of the present invention can obtain the overall image by separately shooting and combining them. In addition, in some applications, the image capture device 110 can be set to 10 million pixels, so that the details of the overall image can be quite clear.

Next, the inspection module 145 judges the size information of the detection portion in the overall image based on the inspection information (step S230). Specifically, the inspection information of each object to be tested records the inspection part to be measured (may be an edge, vertex or area) and its standard specification size (may be length, thickness, angle, radian, radius, Metric such as quantity).

For example, Table (1) is an example to explain the standard size: Table (1)

On the other hand, the inspection module 145 can identify the corresponding detection parts in the overall image, and measure the size of these detection parts separately as size information. For example, FIG. 3C is an example illustrating dimensional measurement. Please refer to FIG. 3C, the overall image WI defines the detection parts 301 and 302, and the inspection module 145 can measure the size information such as the length of the line segment and the angle between the edges in these detection parts 301 and 302, respectively.

Next, the inspection module 145 can determine whether the size information of the overall image conforms to the corresponding standard sizes, and accordingly obtain the inspection result (step S250). Specifically, the verification module 145 can compare the size information with the corresponding standard size, whether the size information exceeds the upper limit, the lower limit, or the upper and lower warning limits, or determine whether the difference between the two exceeds the difference threshold. The inspection module 145 can separately record the size information, corresponding standard size, difference and conformity (eg, whether it is normal, whether it is NG product, or allowable abnormality, etc.) of those detected parts, and select all or part of the information as the inspection result. In an embodiment, the inspection module 145 may also set an allowable quantity (for example, 1, 3, or 10, etc.), and it is considered as an NG product only if the quantity of the detection part that does not meet the specification size exceeds the allowable quantity. The inspection results may be in the form of tables, charts or other forms (for example, CPK reports or other reports), and can be output to a display or other external device for viewing. The inspection results can also be combined with the whole image or captured images, and mark abnormal positions in the images.

In one embodiment, the inspection result includes the difference between the size information of the detection part and the corresponding standard size. The inspection module 145 can obtain the corresponding differences of those detection parts obtained at different time points for different multiple test objects, and generate a trend graph according to the corresponding differences of those test objects in different detection parts. This trend graph records the corresponding differences and corresponding allowable ranges at those time points. The inspection module 145 can add a timestamp to the inspection result of each object to be tested, and integrate the inspection results of the same type of object to be tested at different time points. For example, the inspection module 145 classifies the items of the detection part, and arranges or even charts the differences and the degree of conformity of the same detection part according to the chronological order as a trend graph.

FIG. 4 is an example illustrating a trend chart. Please refer to FIG. 4, which is a trend graph formed for the size of a certain detection part. The size information 403 is the measurement results obtained at different time points (for example, the values of 1.966 and 1.956). After connecting these measurement results, the trend of the value decreasing with time can be obtained. In addition, the trend graph can be additionally set with a lower limit 401 and an upper limit 402, and the difference can be clearly and quickly observed after being displayed on the display. When the user finds that the measurement result exceeds the lower limit 401 or the upper limit 402, he can find the cause of the abnormality for this detection part and remove the obstacle accordingly. Through the analysis of the trend graph, the user can understand the stability of the machine operation during the product manufacturing process, and can eliminate the abnormality in real time to avoid excessive NG product output.

In summary, the size measuring device of the new creative embodiment can automatically photograph the object to be measured (more suitable for large-sized objects to be measured), and quickly perform precise measurements (accuracy up to micrometers, even more small). For the inspection of the size of the test object, the standard standard size can be connected, and OK and NG products are automatically judged, so as to avoid human misjudgment. Measurement data, shooting images or inspection results can be stored digitally, and various types of reports can be automatically generated to save manpower. Graphical analysis of inspection results allows users to quickly determine product production status. In addition, the new creative embodiment simplifies measurement steps, which can reduce education costs and staff turnover.

Although the new creation has been disclosed as above with examples, it is not intended to limit the creation of the new creation. Anyone with ordinary knowledge in the technical field of the subject can make some changes and without departing from the spirit and scope of the creation of the new creation. Retouching, so the scope of protection of this new creation shall be subject to the scope defined in the appended patent application.

100: size measuring device 110: Image capture device 120: light source 130: mobile mechanism 140: memory 141: Shooting control mode 143: Image combination module 145: Inspection module 150: processor S210~S250: Steps CI: Capture images WI: overall image 301, 302: Detection section 401: lower limit 402: upper limit 403: size information

FIG. 1 is a block diagram of components of a size measuring device according to an embodiment of the present invention. FIG. 2 is a flowchart of a size measurement method according to an embodiment of the novel creation. FIG. 3A is an example illustrating captured images for different shooting parts. FIG. 3B is an example illustrating the overall image. FIG. 3C is an example illustrating dimensional measurement. FIG. 4 is an example illustrating a trend chart.

100: size measuring device

110: Image capture device

120: light source

130: mobile mechanism

140: memory

141: Shooting control mode

143: Image combination module

145: Inspection module

150: processor

Claims (5)

A size measuring device is used for detecting an object to be measured, and the size measuring device includes: An image capturing device, respectively shooting a plurality of shooting parts of the object to be tested to obtain a plurality of captured images, wherein each of the captured images is directed to a shooting part of the object to be tested; and A processor, coupled to the image capture device, is configured to execute: Combining the captured images into a whole image, wherein the whole image includes the complete object to be measured; Judging the size information of the plurality of detection parts in the overall image according to a piece of inspection information, wherein the inspection information includes the detection parts of the object to be tested and the corresponding plurality of standard sizes; and It is determined whether the size information of the overall image conforms to the corresponding standard sizes, and a test result is obtained accordingly. The size measuring device according to claim 1, further comprising: A moving mechanism, coupled to the image capturing device or for placing the object to be measured, wherein The processor is configured to: A movement information is generated according to the inspection information, wherein the movement information is related to the moving distance or direction of the movement mechanism, and the movement information is more related to the relative position of the image capturing device respectively toward each of the shooting parts of the object to be measured Location; and Based on the mobile information to drive the mobile agency activities. The size measuring device according to claim 1, wherein each of the shooting portions overlaps with at least another of the shooting portions, and the processor is configured to: The captured images are combined into the overall image according to the overlapping partial regions of the captured parts. The size measurement device of claim 1, wherein the processor is configured to: Obtaining the inspection information, a movement information and a shooting parameter according to the identification information of the object to be tested, wherein the movement information is related to the relative position of the image capturing device toward each of the shooting parts of the object to be tested, and the The shooting parameters are related to the exposure time and focal length of the image capturing device, and the light source. The size measuring device according to claim 1, wherein the inspection result includes the difference between the size information and the corresponding standard size, and the processor is configured to: Obtaining corresponding differences of the detection parts obtained at different time points to different multiple test objects; and A trend graph is generated according to the corresponding differences between the test objects in the different detection parts, wherein the trend graph records the corresponding differences and corresponding allowable ranges at the time points.

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