TWI671713B - Surface inspection method - Google Patents

Abstract

The surface detection method of the present invention firstly establishes at least one ultrasonic image model and at least one optical image model, and after capturing the ultrasonic image of the measured object and the optical image of the measured object, it is transmitted through comparison. The two methods of the ultrasonic image of the measured object and the optical image of the measured object achieve the purpose of surface inspection. Not only can accurate detection results be obtained, but also the detection time can be greatly shortened. It is particularly suitable for the application of automated continuous processing processes, and is relatively more Proactive and reliable means to avoid problematic product continuity output and to monitor the proper rate of production line equipment.

Description

Surface inspection method

The invention relates to a detection technology, in particular to a surface detection method which can shorten the detection time and is particularly suitable for the application of an automated continuous processing process.

In today's processing and manufacturing field, it is extremely important to inspect the quality of the product surface. In addition to detecting the processing completion of the product to maintain the processing quality of the product, it is also possible to further discover related processing by using defects on the product surface. Whether the equipment is abnormal or worn.

Traditionally, the surface inspection methods of products are mostly visual inspection methods. Generally, after inspecting the surface state of the upper and lower surfaces of the product by visual inspection, the quality inspection personnel need to make relevant inspection judgments. It varies, and occasionally because of the unsuccessful inspection, it can not immediately reflect the full picture of product processing quality.

With the evolution of science and technology, the ability to recognize digital images has become more and more advanced, and related automatic surface detection systems have emerged. It is known to detect defects on the surface of products by scanning using optical instruments (such as infrared scanners). In order to achieve the inspection purpose by forming a point and a line to form a surface, it must take a long time. Relatively long random sampling intervals are relatively inconsistent with the requirements of today's automated continuous processing processes.

In view of this, the present invention is to provide a surface detection method which can shorten the detection time, and is particularly suitable for the application of an automated continuous processing process.

The surface detection method of the present invention basically includes the following steps: (a) establishing at least one ultrasonic image model and at least one optical image model; (b) setting the range and comparison value of the detection items according to the required detection Project, using software to set at least one ultrasonic image detection range and ultrasonic comparison value corresponding to the detection item in the at least one ultrasonic image model, and using software to set at least one and The detection range and optical comparison value of the optical image corresponding to the test item; (c) providing a test object; (d) capturing the ultrasonic image of the test object and the optical image of the test object, using at least one The ultrasonic imaging device captures the ultrasonic image of the measured object, and uses at least one digital camera to capture the optical image of the measured object; (e) compares the ultrasonic image of the measured object And the optical image of the object to be tested, the digital image information of the ultrasonic image of the object to be tested and the at least one ultrasonic image model according to the set ultrasonic image detection range and the ultrasonic comparison value through the software Digit Comparing the image information, and comparing the digital image information of the optical image of the measured object with the digital image information of the at least one optical image model through software according to the set optical image detection range and optical comparison value; (f) Output the comparison result.

According to this, the surface detection method of the present invention can achieve the purpose of surface detection by comparing the two results of the ultrasonic image of the measured object and the optical image of the measured object, which can not only obtain accurate detection results, but also greatly Reduce the inspection time, especially suitable for the application of automatic continuous processing.

According to the above technical features, the at least one ultrasonic image model or the at least one optical image model can be constructed by software; the ultrasonic image model and the optical image model are corresponding to the measured object.

According to the above technical features, the surface detection method is to complete the at least one ultrasonic map after completing a solid model corresponding to the measured object, and using at least one ultrasonic imaging device to capture an ultrasonic image of the solid model. Like models.

According to the above technical features, the surface detection method is to complete the at least one optical image model after completing a physical model corresponding to the measured object, and using at least one digital camera to capture an optical image of the physical model.

According to the above technical features, the surface detection method is to complete at least one ultrasound image of the solid model by using at least one ultrasonic imaging device after completing a solid model corresponding to the measured object, and modifying the at least one ultrasound by software. Sonic image model.

According to the above technical features, the surface detection method is to complete the at least one optical image model by using at least one digital camera to capture an optical image of the solid model after completing a solid model corresponding to the measured object, and modifying the software by software.

The surface detection method, when comparing the ultrasonic image of the measured object and the optical image of the measured object, further superimposes the at least one ultrasonic image model and the optical image of the measured object, and the at least one optical The image model and the ultrasonic image of the test object are superimposed for cross-comparison.

The object to be tested can be a product or a semi-finished product that is stuck on a processing line.

The test object is a product or a semi-finished product moving on a processing production line.

The test object is a product or a semi-finished product removed from a processing production line.

In the surface detection method, the comparison result of the ultrasonic image of the measured object and the comparison result of the optical image of the measured object are output to at least one display device connected to the at least one transmission interface through at least one transmission interface.

In the surface detection method, the comparison result of the ultrasonic image of the measured object and the comparison result of the optical image of the measured object are output to at least one control device connected to the at least one transmission interface through at least one transmission interface.

In the surface detection method, the comparison result of the ultrasonic image of the measured object and the comparison result of the optical image of the measured object are output to at least one display device and at least one control device connected to the at least one transmission interface through at least one transmission interface. .

The surface detection method disclosed by the present invention mainly achieves the purpose of surface detection by comparing the two results of the ultrasonic image of the measured object and the optical image of the measured object, which not only can obtain accurate detection results, but also greatly shortens the detection. Time is particularly suitable for the application of automated continuous processing processes, in a relatively more active and reliable way, to avoid problematic product continuous output, and to monitor the proper rate of production line equipment.

The present invention mainly provides a surface detection method which can shorten the detection time and is particularly suitable for the requirements of an automated continuous processing process. Please refer to FIG. 1 and FIG. 2 at the same time. The surface detection method of the present invention basically includes at least the following steps :

(a) Step S1 is to establish at least one ultrasonic image model and at least one optical image model; in principle, the at least one ultrasonic image model or the at least one optical image model can be constructed by software; the ultrasound The sonic image model and the optical image model correspond to the measured object.

(b) Step S2 is to set the range and comparison value of the detection items. According to the required detection items, set at least one ultrasonic image detection range corresponding to the detection items in the at least one ultrasonic image model through software. And ultrasonic comparison value; using software to set at least one optical image detection range and optical comparison value corresponding to a detection item in the at least one optical image model.

(c) Step S3 provides a test object 10; when implemented, the test object may be a product or a semi-finished product that is stagnated on a processing production line; the test object 10 may also be a The product or semi-finished product moving on a processing production line 20; of course, the measured object can be a product or semi-finished product removed from a processing production line.

(d) Step S4 is to capture the ultrasonic image of the measured object 10 and the optical image of the measured object; as shown in the figure, at least one ultrasonic imaging device 30 may be used to capture the measured object 10 An ultrasonic image of the object under test, and an optical image of the object under test 10 captured by at least one digital camera 40.

(e) Step S5 is to compare the ultrasonic image of the measured object and the optical image of the measured object. The software 50 uses the software 50 to detect the ultrasonic image according to the set ultrasonic image detection range and the ultrasonic comparison value. The digital image information of the image is compared with the digital image information of the at least one ultrasonic image model; and the software 50 is used to optically measure the object according to the set optical image detection range and optical comparison value through the software 50 The digital image information of the image is compared with the digital image information of the at least one optical image model.

(f) Step S6 is to output the comparison result; it is possible to output the comparison result of the ultrasonic image of the test object and the comparison result of the optical image of the test object to at least one transmission interface 60 through at least one transmission interface 60. Device; during implementation, it can be connected to at least one display device 71 through the at least one transmission interface 60, or at least one control device 72 through the at least one transmission interface 60; of course, as shown in the figure, the at least one The transmission interface 60 is connected to at least one display device 71 and at least one control device 72. In addition to using the display device 71 to present the comparison result in real time, the control device 72 can also use the control device 72 to perform real-time detection of the flawed detected object according to the comparison result. 10 Disposal (such as removal from the production line or shaving).

In the surface detection method of the present invention, when comparing the ultrasonic image of the measured object, as shown in FIG. 3, the at least one ultrasonic image model A1 (represented by a solid line in the figure) and the The ultrasonic image A2 of the test object (indicated by a dashed line in the figure) is overlapped to compare the difference between the at least one ultrasonic image model A1 and the ultrasonic image A2 of the test object; similarly, in comparison When measuring the optical image of the test object, the software can also overlap the at least one optical image model with the optical image of the test object by comparing the difference between the at least one optical image model and the optical image of the test object; of course, also Further, a cross-comparison is performed on a manner in which the at least one ultrasonic image model is overlapped with the optical image of the measured object, and a manner in which the at least one optical image model is overlapped with the ultrasonic image of the measured object.

According to this, the surface detection method of the present invention can achieve the purpose of surface detection by comparing the two results of the ultrasonic image of the measured object and the optical image of the measured object, which can not only obtain accurate detection results, but also greatly Shorten the detection time, which can effectively shorten the random sampling interval, and even detect one pair of products or semi-finished products. It is particularly suitable for automatic continuous processing processes such as sheet metal stamping or unmanned factories. It uses relatively more active and reliable means to avoid problematic product continuous output and monitors the availability of production line equipment.

Furthermore, the surface detection method of the present invention can be implemented after completing a solid model corresponding to the measured object, and then acquiring the ultrasonic image of the solid model by using at least one ultrasonic imaging device. At least one ultrasonic image model; and after completing a physical model corresponding to the measured object, using at least one digital camera to capture the optical image of the physical model, the at least one optical image model is completed.

According to the surface detection method of the present invention, after completing a solid model corresponding to the measured object, at least one ultrasonic imaging device is used to capture an ultrasonic image of the solid model, and the at least one ultrasonic image is completed by software modification. An image model; and after completing a solid model corresponding to the measured object, at least one digital camera is used to capture the optical image of the solid model, and the at least one optical image model is completed by software modification.

It is worth mentioning that, after the surface detection method of the present invention completes the comparison between the ultrasonic image of the measured object and the optical image of the measured object, it can further establish a database to record all comparison results, and compare the results. The resulting defect features are named to help further establish an effective defect judgment rule.

Specifically, the surface detection method disclosed in the present invention mainly achieves the purpose of surface detection by comparing the two results of the ultrasonic image of the measured object and the optical image of the measured object, which not only can obtain accurate detection results, but also It can greatly shorten the testing time, and is especially suitable for the application of automated continuous processing processes. By using relatively more positive and reliable methods, it can avoid problematic product continuous output and monitor the production line equipment's proper rate.

The above-mentioned embodiments are only for explaining the technical ideas and characteristics of the present invention. The purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. When the scope of the patent of the present invention cannot be limited, That is, any equivalent changes or modifications made in accordance with the spirit disclosed in the present invention should still be covered by the patent scope of the present invention.

S1‧‧‧ (a) Step

S2‧‧‧ (b) Step

S3‧‧‧ (c)

S4‧‧‧ (d) Step

S5‧‧‧ (e) Step

S6‧‧‧ (f) Step

A1‧‧‧ Ultrasonic Image Model

A2‧‧‧ Ultrasonic image of the test object

10‧‧‧ Test object

20‧‧‧ Production Line

30‧‧‧ Ultrasonic imaging equipment

40‧‧‧ digital camera

50‧‧‧Software

60‧‧‧Transport interface

71‧‧‧display device

72‧‧‧Control

Fig. 1 is a basic flowchart of the present invention. FIG. 2 is a schematic diagram of a method of capturing an ultrasonic image of a measured object and a method of capturing an optical image of the measured object that may be implemented by the present invention. FIG. 3 is a schematic diagram of a comparison state between the ultrasonic image of the measured object and the ultrasonic image model in the present invention.

Claims (11)

A surface detection method is used for a test object, a processing production line, an ultrasonic imaging device, a digital camera, a software, a control device, a transmission interface, a display device, an ultrasonic image model and a An optical image model; wherein the transmission interface is connected to the display device and the control device; the surface detection method includes at least the following steps: the processing production line provides the test object; the ultrasonic imaging device captures one of the test objects Ultrasound image of the test object, and the digital camera captures an optical image of the test object of the test object; the software digital image information of the ultrasonic image of the test object and digital of the ultrasonic image model The image information is compared, and the software compares the digital image information of the optical image of the measured object with the digital image information of the at least one optical image model; compares the ultrasonic image of the measured object through the transmission interface The comparison result between the result and the optical image of the measured object is output to the display device connected to the transmission interface, and the comparison result is presented by using the display device. The surface inspection method according to claim 1, wherein the ultrasonic image model or the optical image model can be constructed by the software; the ultrasonic image model and the optical image model are corresponding to the The test object. The surface detection method according to claim 1, wherein the surface detection method is after completing a solid model corresponding to the measured object, and then using the ultrasonic imaging device to capture an ultrasonic image of the solid model. To complete the ultrasonic image model. The surface inspection method as described in claim 1, wherein the surface inspection method is to complete the optical after acquiring a physical image of the physical model using the digital camera after completing a physical model corresponding to the measured object. Image model. The surface detection method according to claim 1, wherein the surface detection method is to acquire an ultrasonic image of the physical model by using the ultrasonic imaging device after completing a physical model corresponding to the measured object, The ultrasonic image model is completed through the software modification. The surface inspection method according to claim 1, wherein the surface inspection method is to complete an entity model corresponding to the object under test, and then use the digital camera to capture an optical image of the entity model and modify it through the software. Complete the optical image model. The surface detection method according to claim 1, wherein the surface detection method further compares the ultrasonic image model with the object when comparing the ultrasonic image of the object with the optical image of the object. The method of overlapping the optical images of the test object and the method of overlapping the optical image model with the ultrasonic image of the test object are used for cross comparison. The surface inspection method according to any one of claims 1 to 7, wherein the measured object is a product or a semi-finished product that is stagnated on a processing production line. The surface inspection method according to any one of claims 1 to 7, wherein the measured object is a product or a semi-finished product moving on a processing production line. The surface inspection method according to any one of claims 1 to 7, wherein the measured object is a product or a semi-finished product removed from a processing production line. The surface detection method according to any one of claims 1 to 7, wherein, in the surface detection method, the software outputs the comparison result of the ultrasonic image of the test object and the comparison result of the optical image of the test object to the transmission. The control device connected to the interface.