Method for detecting through holes and detection system for through holes

Abstract

The application discloses a kind of detection methods and detection systems for through hole for carrying out detection to through hole on object, detection method includes the following steps: the object to be measured is fixed, and the opening of the two ends of through hole on the object to be measured is located in two mutually independent regions respectively, and is recorded as first region and second region respectively;Infrared camera device is arranged in the first region, and the opening of the through hole in the first region is located in the shooting range of infrared camera device, gas with temperature different from the temperature of the second region and the object to be measured is released into the second region, and the gas flows into the first region through the through hole, and the infrared image when the gas flows out from the through hole is collected by infrared camera device;The infrared image collected by infrared camera device is processed and analyzed, to judge whether the through hole meets the requirements or not.The application carries out detection to through hole on object using the above detection method, and the detection efficiency is high, to avoid damage to the surface of the measured object.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of detection methods of through hole and the detection system for through hole. BACKGROUND

[0002] The working temperature of engine turbine, combustion chamber is high, far exceeds the temperature resistance limit of the material of current turbine blade, flame tube itself, makes the working environment of aeroengine turbine blade, flame tube seriously deteriorate, appears poor reliability, short service life etc.Problems.Currently, gas film cooling technology is used in engine.The main structural characteristics of gas film cooling technology is that a large number of gas film holes are designed on engine components, the hole diameter of gas film hole is generally 0.2-0.8mm, the space angle is complex, and the machining quality detection of gas film hole, especially the detection of whether there is blockage or non-through condition, generally adopts artificial observation method or uses through gauge / needle gauge to detect each gas film hole one by one, not only is inefficient, but also may not be accurate enough to the quality inspection of through hole, and is easy to cause scratch and other damage to the surface of measured object. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the low efficiency of detecting gas film holes on engine components in the prior art, and to provide a detection method for through hole and a detection system for through hole.

[0004] The present application solves the above technical problems by the following technical solutions:

[0005] The present application provides a detection method for through hole, for detecting through hole on object, the detection method comprises the following steps:

[0006] S1, the measured object is fixed, and the openings of the two ends of the through hole on the measured object are located in two mutually independent regions, respectively recorded as first region and second region;

[0007] S2, infrared camera device is arranged in the first region, and the opening of the through hole in the first region is located in the shooting range of the infrared camera device, the gas with temperature different from the temperature of the second region and the temperature of the measured object is released into the second region, and the gas flows from the second region to the first region through the through hole, and the infrared image of the gas flowing out of the through hole is collected by the infrared camera device;

[0008] S3, the infrared image collected by the infrared camera device is processed and analyzed to determine whether the through hole meets the requirements.

[0009] In this solution, when inspecting through holes on an object using the above steps, the infrared image acquired by the infrared camera can quickly identify, record, and detect whether gas is being discharged from the through hole to determine if it is a through hole. Furthermore, the shape of the gas or gas column as it passes through the through hole can be used to determine whether the outer dimensions, shape, and machining position of the through hole are correct. This inspection method not only offers high efficiency but also avoids scratches and other damage to the surface of the object being inspected, which can occur when using go / no-go gauges / pin gauges to inspect through holes.

[0010] Preferably, between step S1 and step S3, the detection method further includes the following step:

[0011] S21. The infrared camera is placed in the second region, and the opening of the through hole in the second region is located within the shooting range of the infrared camera. Gas with a temperature different from the ambient temperature of the first region and the temperature of the object to be measured is released into the first region, and the gas flows from the first region to the second region through the through hole. The infrared camera captures an infrared image of the gas flowing out of the through hole.

[0012] In this solution, by processing and analyzing the infrared images of the gas flowing out from both sides of the same through hole, it is possible to more accurately determine whether the size, shape, spatial position, and inclination of the through hole meet the design requirements.

[0013] Preferably, the infrared image includes one or more pieces of information about the shape, size, and spatial location of the gas as it flows out of the through-hole.

[0014] In this solution, by collecting information such as the shape, size, and spatial position of the infrared image when gas flows out of the through hole, it can be determined whether the through hole meets the requirements.

[0015] Preferably, in step S3, the infrared image obtained by the infrared camera device is processed into a three-dimensional stereoscopic image to generate a data model, which is then compared with the data model of the through hole during the design process to determine whether the through hole meets the requirements.

[0016] In this solution, by performing three-dimensional imaging processing on the infrared images acquired by the infrared camera device, the information of the through hole can be obtained more intuitively, facilitating rapid judgment.

[0017] Preferably, in step S3, an infrared image with a temperature close to that of the gas when it flows out of the through hole is selected from multiple sets of infrared images acquired by the infrared camera device for processing and analysis.

[0018] In this scheme, infrared images of the gas after the temperature has stabilized when it flows out of the through hole are processed and analyzed to avoid the instability of the initial stage when the gas flows out of the through hole affecting the accuracy of the through hole judgment.

[0019] Preferably, there are multiple through holes, and the multiple through holes are labeled before step S2.

[0020] In this solution, by labeling multiple through holes, the infrared images collected when detecting multiple through holes at once can be confused, making it impossible to match the infrared images with the through holes and affecting the correct judgment of the through holes.

[0021] Preferably, the pressure of the gas before entering the through-hole is greater than the atmospheric pressure in the second region.

[0022] In this solution, the above-mentioned technical solution allows gas to enter the through hole quickly, improving detection efficiency. It also avoids the gas moving slowly before entering the through hole and mixing with other gases in the area, which would affect the detection results.

[0023] Preferably, the gas is released through a gas release device, which includes a gas storage tank, a temperature regulating mechanism, a pressure regulating mechanism, and a jetting mechanism.

[0024] The gas storage tank is used to store the gas used for testing;

[0025] The temperature regulating mechanism is used to regulate the temperature of the gas so that the temperature of the gas when it is ejected from the injection mechanism is different from the ambient temperature in the first area or the second area and the temperature of the object to be measured.

[0026] The pressure regulating mechanism is used to regulate the injection pressure of the gas so that the pressure of the gas when it is ejected from the injection mechanism is greater than the atmospheric pressure in the first region or the second region.

[0027] The injection mechanism is used to inject the gas into the first area or the second area.

[0028] In this solution, by setting up a gas release device to control the temperature and pressure of the gas release, suitable test gas can be obtained as needed, which improves the detection efficiency and ensures the accuracy of through-hole detection.

[0029] The present invention also provides a detection system for through holes, the detection system comprising a detection platform, a gas release device, an infrared camera device, and an information processing device;

[0030] The detection platform is used to mount the object to be tested, and the openings at both ends of the through hole on the object to be tested are located in two independent areas.

[0031] The gas release device and the infrared camera device are respectively installed in one of the areas. The gas release device is used to release gas with a temperature different from the ambient temperature of the area and the temperature of the object to be tested. The infrared camera device is used to collect infrared images of the gas flowing out of the through hole.

[0032] The information processing device is connected to the infrared camera device. The information processing device is used to receive the infrared image acquired by the infrared camera device. The information processing device is also used to perform three-dimensional stereoscopic imaging processing on the infrared image to obtain the data model of the through hole. The information processing device is also used to compare the obtained data model with the data model of the through hole during the design and determine whether the through hole meets the requirements.

[0033] In this solution, the aforementioned structure is used. An infrared camera captures infrared images of the gas flowing out of the through-hole from the gas release device. An information processing device then processes the captured infrared images to generate a data model. Comparing this data model with the corresponding through-hole's design data model allows for rapid determination of whether the detected through-hole meets the requirements. This through-hole detection system can quickly detect the processing quality of through-holes on an object, improving detection efficiency and reliability. The non-contact detection also avoids damage caused by human contact during the detection process.

[0034] Preferably, the infrared image includes one or more pieces of information about the shape, size, and spatial location of the gas as it flows out of the through-hole.

[0035] In this solution, the infrared images collected by the infrared camera when gas flows out of the through hole convey various information, which can more accurately determine whether the through hole meets the design requirements.

[0036] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0037] The significant advantages of this invention are as follows: When detecting through-holes on an object, the infrared image acquired by the infrared camera can quickly identify, record, and detect whether gas is being discharged from the through-hole to determine if it is a through-hole. Furthermore, the shape of the gas or gas column as it passes through the through-hole can be used to determine whether the outer dimensions, shape, and machining position of the through-hole are correct. This detection method not only offers high efficiency but also avoids scratches and other damage to the surface of the object being tested caused by using go / no-go gauges / pin gauges when detecting through-holes, as this non-contact method is used. Attached Figure Description

[0038] Figure 1This is a flowchart illustrating the method for detecting through holes in a preferred embodiment of the present invention.

[0039] Figure 2 This is a schematic diagram of the detection of one side of the through hole in a preferred embodiment of the present invention.

[0040] Figure 3 This is a schematic diagram illustrating the detection of the other side of the through hole in a preferred embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of the infrared image of the gas outflow through hole after three-dimensional stereoscopic imaging processing in a preferred embodiment of the present invention.

[0042] Figure 5 The results of hole shape inspection for some through holes that do not conform to the design (taking circular through holes as an example).

[0043] Explanation of reference numerals in the attached figures:

[0044] Flame tube 100

[0045] First air film pore 101

[0046] Second air film pore 102

[0047] Third air film pore 103

[0048] Fourth air film pore 104

[0049] Infrared camera device 200

[0050] Gas release device 300

[0051] 400 isolation components

[0052] Area 10

[0053] Second Zone 20 Detailed Implementation

[0054] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments thereon.

[0055] like Figure 1 The diagram illustrates a method for detecting through holes disclosed in this embodiment. This method is used to detect through holes on an object and includes the following steps:

[0056] S10. Fix the object to be measured, and make the openings at both ends of the through hole on the object to be measured located in two independent regions, which are referred to as the first region and the second region respectively.

[0057] S20. An infrared camera is set up in the first area, and the opening of the through hole in the first area is located within the shooting range of the infrared camera. Gas with a temperature higher than the ambient temperature of the second area and the temperature of the object to be measured is released into the second area, and the gas flows from the second area to the first area through the through hole. The infrared camera captures an infrared image of the gas flowing out of the through hole.

[0058] S30. Set the infrared camera device in the second area, and make the opening of the through hole in the second area within the shooting range of the infrared camera device. Release gas with a temperature higher than the ambient temperature of the first area and the temperature of the object to be measured into the first area, and make the gas flow from the first area to the second area through the through hole. Collect infrared images of the gas flowing out of the through hole through the infrared camera device.

[0059] S40. Process and analyze the infrared images acquired by the infrared camera device to determine whether the through hole meets the requirements.

[0060] In this embodiment, when inspecting through holes on an object using the above steps, the infrared image acquired by the infrared camera can quickly identify, record, and detect whether gas is being discharged from the through hole to determine if it is a through hole. Furthermore, based on the shape of the gas or gas column as it passes through the through hole, parameters such as the outer dimensions, shape, machining position, and inclination of the through hole can be detected to determine if they meet design requirements. This inspection method not only offers high efficiency but also avoids scratches and other damage to the surface of the object being inspected, which can occur when using go / no-go gauges / pin gauges to inspect through holes.

[0061] Specifically, in this embodiment, gas is released through a gas release device, which can adjust parameters such as the temperature and pressure of the released gas as needed. During testing, all holes, openings, etc., of the object under test, except for the through hole to be tested, are sealed, and the area on the side to which gas is to be introduced forms a sealed inner cavity. The pressure in the inner cavity is the atmospheric pressure at the location, and the temperature of the object under test and the first and second areas surrounding it are both room temperature. The gas release device releases gas into its inner cavity at temperatures and pressures higher than the room temperature and atmospheric pressure of the surrounding area. When the gas passes through the through-hole, due to the temperature difference between the regulated gas and the object under test, an infrared camera placed outside the object can clearly distinguish between the gas and the object, obtaining an infrared image of the gas exiting the through-hole. By establishing a three-dimensional image and comparing it with the data model designed for the object, it is possible to quickly identify, record, and detect whether gas is exiting the through-hole, thus determining whether the through-hole is indeed a through-hole. The shape of the gas / gas column as it passes through the through-hole can also be detected, along with the outer dimensions, shape, and machining position of the through-hole. By adjusting the positions of the infrared camera and the gas release device's outlets, for example, by swapping their positions and repeating the above method, it is possible to detect the outer dimensions, shape, and machining position of the other opening of the through-hole.

[0062] During testing, any gas that is harmless to the environment and the object under test can be used to avoid environmental pollution or damage to the object. The gas temperature can be adjusted to any temperature that is harmless to the environment and the object under test to avoid accidental injury to operators or thermal deformation of the object under test due to excessive gas temperature. Simultaneously, the temperature of the released gas should have a significant temperature difference from the temperature of the object under test and the surrounding environment, ideally more than 10°C. This facilitates the infrared camera's differentiation between the infrared image of the gas flowing out of the orifice and the infrared image of the object itself, creating a clear boundary between the temperature inside the orifice and the temperature of the object outside the orifice, thus allowing for more accurate determination of the orifice's shape and size.

[0063] The pressure of the released gas must be greater than atmospheric pressure, while also avoiding environmental damage or deformation of the object being tested. A gas pressure greater than atmospheric pressure before entering the through-hole allows for rapid entry, improving detection efficiency and preventing slow gas movement and mixing with other gases in the area, which could affect the test results. In this embodiment, the gas pressure can be adjusted to 0.2 MPa.

[0064] The atmospheric pressure mentioned in this embodiment refers to the pressure in the normal environment where the object under test is located. In other embodiments, a pressure difference can be created at both ends of the through-hole, allowing gas to enter the other side of the region through the through-hole from the release area.

[0065] When testing both sides of the through-hole of the same object, it is best to wait for a period of time to allow the object to cool down, so as to avoid the high-temperature gas introduced during the previous test affecting the test results.

[0066] In other embodiments, an infrared camera can be installed on only one side of the through hole, while gas is introduced into the other side for detection. Although this cannot obtain more accurate information about the through hole, it can detect whether gas is discharged from the through hole to determine whether it is a through hole. This can be used in situations where only checking whether a hole is a through hole is required, and the requirements for parameters such as the size, shape, and inclination of the through hole are not high.

[0067] Alternatively, in other embodiments, the positions of the infrared camera and the gas release device can be kept unchanged, and the orientation of the object under test can be adjusted to acquire infrared images of the gas passing through the openings at both ends of the through hole.

[0068] Of course, in other embodiments, the temperature of the gas introduced into the first region or the second region may also be lower than the ambient temperature in the first region or the second region, and also lower than the temperature of the object being tested itself, which will not be elaborated here.

[0069] In this embodiment, the infrared image captured by the infrared camera includes multiple pieces of information such as the shape, size, and spatial position of the gas flowing out of the through-hole. By analyzing the above information in the infrared image, it can be determined whether the through-hole meets the requirements.

[0070] Professional image processing software can be used to process and analyze infrared images to determine whether the through-hole meets the requirements. In this embodiment, the infrared image obtained by the infrared camera device is processed into a three-dimensional stereoscopic image to generate a data model, which is then compared with the data model of the through-hole during the design phase to determine whether the through-hole meets the requirements. This provides a more intuitive way to obtain information about the through-hole and facilitates quick judgment.

[0071] When processing infrared images, the infrared image at which the gas flows out of the orifice at a temperature close to the temperature at which the gas is released is selected from multiple sets of infrared images acquired by the infrared camera for processing and analysis. This avoids the instability of the initial stage when the gas flows out of the orifice affecting the accuracy of the orifice determination.

[0072] To improve the detection efficiency of through holes on the object under test, multiple through holes can be detected at once. When there are multiple through holes to be detected, they should be labeled to avoid confusion between the acquired infrared images when detecting multiple through holes at once, which would prevent the infrared images from being matched with the through holes and affect the correct identification of the through holes.

[0073] In this embodiment, the gas release device includes a gas storage tank, a temperature regulating mechanism, a pressure regulating mechanism, and a jetting mechanism. The gas storage tank stores the gas for testing; the temperature regulating mechanism regulates the gas temperature, ensuring that the temperature of the gas ejected from the jetting mechanism is higher than the ambient temperature in the first or second region and the temperature of the object being tested; the pressure regulating mechanism regulates the gas jetting pressure, ensuring that the pressure of the gas ejected from the jetting mechanism is greater than the atmospheric pressure in the first or second region; the jetting mechanism jets the gas into the first or second region. By controlling the temperature and pressure of the released gas using this gas release device, suitable test gas can be obtained as needed, improving detection efficiency and ensuring the accuracy of through-hole detection.

[0074] The gas release device also has a heat preservation function, which avoids increasing the detection cost due to frequent heating of the gas.

[0075] Based on the above-described method for detecting through-holes, this embodiment also provides a detection system for through-holes, which detects through-holes. The detection system includes a detection platform, a gas release device, an infrared camera, and an information processing device. The detection platform is used to mount the object to be tested, with the openings at both ends of the through-hole on the object located in two independent areas. The gas release device and the infrared camera are each located in one of these areas. The gas release device releases gas at a temperature higher than the ambient temperature of the area, and the infrared camera captures infrared images of the gas flowing out of the through-hole. The information processing device is connected to the infrared camera and receives the infrared images captured by the infrared camera. The information processing device also performs three-dimensional imaging processing on the infrared images to obtain a data model of the through-hole. Furthermore, the information processing device compares the obtained data model with the data model of the through-hole during its design and determines whether the through-hole meets the requirements.

[0076] When using this inspection system to inspect through holes, an infrared camera captures infrared images of the gas flowing out of the through hole as it is released from the gas release device. An information processing device then processes these infrared images to generate a data model. Comparing this data model with the corresponding design data model for the through hole allows for a quick determination of whether the inspected through hole meets the requirements. This through hole inspection system can rapidly detect the processing quality of through holes on an object, improving the inspection efficiency and reliability. The non-contact inspection also avoids damage caused by human contact during the inspection process.

[0077] The following section uses the inspection of film vents on the flame tube of an aero-engine as an example. By utilizing the above-mentioned through-hole inspection system and method, a brief introduction will be given on how to inspect whether the film vents on the flame tube meet the processing requirements.

[0078] like Figure 2 and Figure 3 As shown, the flame tube 100 to be tested is first sealed by the separator 400 (except for the first gas film hole 101, the second gas film hole 102, the third gas film hole 103, and the fourth gas film hole 104 to be tested), dividing the inside and outside of the tube into two regions: the outside of the tube is the first region 10, and the inside of the tube is the second region 20. The first region 10 and the second region 20 do not affect each other; Figure 2 As shown, the outlet of the gas release device 300 is placed in the second region 20, and the infrared camera 200 is set in the first region 10 on the outside of the cylinder to detect the outer opening of the gas film hole to be tested. The outer opening of the gas film hole must be within the shooting range of the infrared camera 200. The gas temperature and pressure in the gas release device 300 are adjusted so that the gas temperature is greater than 20°C different from the cylinder temperature of the flame tube 100 to be tested, which is at room temperature. The gas pressure is adjusted to 0.2 MPa, and the gas is released to enter the cylinder of the flame tube 100 to be tested (i.e., the second region 20), and then discharged through the first gas film hole 101, the second gas film hole 102, the third gas film hole 103, and the fourth gas film hole 104 on the cylinder wall. The discharge process is recorded by the infrared camera 200. Then, as shown in the figure... Figure 3 As shown, the inner and outer positions of the infrared camera device 200 and the gas release device 300 are changed, and the outer side of the flame tube 100 is sealed with the isolator 400 to form a closed space. The above process is repeated to detect the openings on the inner sides of the first gas film hole 101, the second gas film hole 102, the third gas film hole 103, and the fourth gas film hole 104 to be tested.

[0079] like Figure 4 The image shows the detection results of the first air film hole 101, the second air film hole 102, the third air film hole 103, and the fourth air film hole 104 located on the outer side of the cylinder, captured by the infrared camera device 200. Among them, no high-temperature gas flowed out of the detected fourth air film hole 104, which indicates that the fourth air film hole 104 is not a through hole.

[0080] Taking a circular air film pore as an example again, if the pore shape of the detected air film pore is as follows... Figure 5 As shown, this indicates that these air film pores do not meet the design requirements and need to be reprocessed.

[0081] By using professional image processing software to perform three-dimensional imaging processing on the infrared images of the same gas film hole with different openings obtained from two separate photographs, the shape, size, machining position, and inclination of the gas film hole can be determined. Then, by comparing the data model of the corresponding gas film hole on the cylinder of the flame tube 100 during the design process, it can be determined whether the gas film hole meets the design requirements.

[0082] Infrared cameras are a relatively mature technology. Common infrared camera devices can be selected from those available on the market, and there are also many types of image processing software available. You can choose according to your needs, which will not be described in detail here.

[0083] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for detecting through holes, used to detect through holes on an object, characterized in that: The detection method includes the following steps: S1. Fix the object to be tested, and make the openings at both ends of the through hole on the object to be tested located in two independent regions, which are respectively referred to as the first region and the second region. S2. An infrared camera is set up in the first area, and the opening of the through hole in the first area is located within the shooting range of the infrared camera. A gas with a temperature different from the ambient temperature of the second area and the temperature of the object to be measured is released into the second area, and the gas flows from the second area to the first area through the through hole. An infrared image of the gas flowing out of the through hole is acquired by the infrared camera. The infrared image includes one or more pieces of information such as the shape, size and spatial position of the gas flowing out of the through hole. S3. Process and analyze the infrared image acquired by the infrared camera device, and determine whether the outer dimensions, shape and machining position of the through hole meet the requirements based on one or more of the information of the shape, size and spatial position of the gas flowing out of the through hole.

2. The method for detecting through holes as described in claim 1, characterized in that, Between step S1 and step S3, the detection method further includes the following steps: S21. The infrared camera is placed in the second region, and the opening of the through hole in the second region is located within the shooting range of the infrared camera. Gas with a temperature different from the ambient temperature of the first region and the temperature of the object to be measured is released into the first region, and the gas flows from the first region to the second region through the through hole. The infrared camera captures an infrared image of the gas flowing out of the through hole.

3. The method for detecting through holes as described in claim 2, characterized in that, In step S3, the infrared image obtained by the infrared camera device is processed into a three-dimensional stereoscopic image to generate a data model, which is then compared with the data model of the through hole during the design process to determine whether the through hole meets the requirements.

4. The method for detecting through holes as described in claim 2, characterized in that, In step S3, an infrared image with a temperature close to that of the gas when it flows out of the through hole is selected from multiple sets of infrared images acquired by the infrared camera device for processing and analysis.

5. The method for detecting through holes as described in claim 1, characterized in that, The number of through holes is multiple, and before step S2, the multiple through holes are labeled.

6. The method for detecting through holes as described in claim 1, characterized in that, The pressure of the gas before entering the through hole is greater than the atmospheric pressure in the second region.

7. The method for detecting through holes as described in claim 1, characterized in that, The gas is released through a gas release device, which includes a gas storage tank, a temperature regulating mechanism, a pressure regulating mechanism, and a jetting mechanism. The gas storage tank is used to store the gas used for testing; The temperature regulating mechanism is used to regulate the temperature of the gas so that the temperature of the gas when it is ejected from the injection mechanism is different from the ambient temperature in the first area or the second area and the temperature of the object to be measured. The pressure regulating mechanism is used to regulate the injection pressure of the gas so that the pressure of the gas when it is ejected from the injection mechanism is greater than the atmospheric pressure in the first region or the second region. The injection mechanism is used to inject the gas into the first area or the second area.

8. A detection system for through holes, characterized in that, For performing the detection method of a through hole as described in any one of claims 1-7, the detection system includes a detection platform, a gas release device, an infrared camera device, and an information processing device; The detection platform is used to mount the object to be tested, and the openings at both ends of the through hole on the object to be tested are located in two independent areas. The gas release device and the infrared camera device are respectively installed in one of the areas. The gas release device is used to release gas with a temperature different from the ambient temperature of the area and the temperature of the object to be measured. The infrared camera device is used to collect infrared images of the gas flowing out of the through hole. The infrared images include one or more of the following information: the shape, size and spatial position of the gas flowing out of the through hole. The information processing device is connected to the infrared camera device. The information processing device is used to receive infrared images acquired by the infrared camera device. The information processing device is also used to perform three-dimensional stereoscopic imaging processing on the infrared images to obtain a data model of the through hole. The information processing device is also used to compare the obtained data model with the data model of the through hole during design, and to determine whether the outer dimensions, shape, and machining position of the through hole meet the requirements based on one or more of the shape, size, and spatial position of the gas flowing out of the through hole.

Images