Oil metal particle detection device and method based on electromagnetic infrared thermal imaging technology

Abstract

The invention provides an oil metal particulate matter detection device and method based on the electromagnetic infrared thermal imaging technology, the device comprises a flow cell, an electromagnetic induction heating module and a thermal infrared imager, the flow cell is used for containing oil to be detected and forming a detection window, and the electromagnetic induction heating module is used for heating the detection window; comprising a flow cell base body, a slit flat plane structure, a quartz glass window and an infrared window, the slit flat plane structure is arranged in the flow cell base body, and the quartz glass window is fixed to one side of the slit flat plane structure in a sealed mode; the infrared window is hermetically fixed on the other side of the slit flat surface structure; the electromagnetic induction heating module is fixedly arranged on the outer side of the quartz glass window and used for conducting induction heating on the metal particles in the slit flat face structure through the quartz glass window. The thermal infrared imager is fixedly arranged on the outer side of the infrared window and used for collecting an infrared thermal image of the slit area of the slit flat face structure through the infrared window so as to recognize the heated metal particles.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic infrared active thermal imaging nondestructive testing technology, and more particularly to a device and method for detecting oil metal particles based on electromagnetic infrared thermal imaging technology. Background Technology

[0002] Active infrared nondestructive testing (ANDT) is a nondestructive testing method based on the combination of thermal excitation and infrared imaging. In recent years, it has been widely used in industrial inspection due to its advantages such as fast detection speed, non-contact operation, high safety, large single-scan area, and intuitive results. This technology rapidly heats the surface of the object under test using an external excitation source (such as a flash lamp, halogen lamp, laser, electromagnetic induction, or microwave), then uses an infrared thermal imager to record the temperature distribution changes during the heating or cooling process. Combined with algorithms to analyze the infrared thermal characteristic curves, it achieves defect location and feature extraction. In the field of oil testing, the presence of metal particle contaminants is often closely related to wear, fatigue, or potential failures of internal friction pairs or key components. Therefore, accurate detection of metal particles in oil is of great significance for equipment condition monitoring, fault early warning, and maintenance decision-making.

[0003] Currently, methods for detecting metal particles in oil mainly include optical microscopy, inductively coupled plasma (ICP) sensors, and X-ray fluorescence spectroscopy. However, these methods have certain limitations: optical microscopy requires offline processing of oil samples, resulting in low detection efficiency and the inability to achieve real-time monitoring; ICP sensors are susceptible to interference from factors such as oil viscosity and air bubbles, limiting detection accuracy; and X-ray fluorescence spectroscopy involves expensive equipment and poses radiation safety risks. Furthermore, while traditional infrared thermal imaging technology can be used for material defect detection, its application in detecting metal particles in oil is limited. This is mainly because oil has complex thermal conductivity characteristics, and the thermal response signal of metal particles is weak, making it difficult for existing methods to achieve high-sensitivity, high-resolution particle identification and quantitative analysis. Therefore, a new detection technology that can overcome these shortcomings is urgently needed to meet the needs of online monitoring and intelligent operation and maintenance of industrial equipment. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a device and method for detecting metal particles in oil based on electromagnetic infrared thermal imaging technology. This invention utilizes electromagnetic induction to externally heat metal particles in the oil, and then captures the thermal signals of the particles through an infrared thermal imager window, achieving non-contact, online detection of metal contaminants in oil.

[0005] The technical means employed in this invention are as follows: An oil-based metal particle detection device based on electromagnetic infrared thermal imaging technology includes: a flow cell, an electromagnetic induction heating module, and an infrared thermal imager, wherein: The flow cell, used to contain the oil to be tested and form a detection window, includes a flow cell substrate, a slit flat surface structure, a quartz glass window, and an infrared window. The slit flat surface structure is disposed inside the flow cell substrate. The quartz glass window is sealed and fixed to one side of the slit flat surface structure and located on the outer sidewall of the flow cell. The infrared window is sealed and fixed to the other side of the slit flat surface structure and located on the opposite outer sidewall of the flow cell. The electromagnetic induction heating module is fixedly installed on the outside of the quartz glass window and is used to inductively heat the metal particles in the slit flat structure through the quartz glass window. The infrared thermal imager is fixedly installed on the outside of the infrared window and is used to collect infrared thermal images of the slit area of ​​the slit flat surface structure through the infrared window in order to identify the heated metal particles.

[0006] Furthermore, both the quartz glass window and the infrared window are fixedly connected to the slit flat surface structure via a sealing assembly, forming a sandwich structure.

[0007] Furthermore, the sealing assembly includes a window sealing ring and a window sealing ring flange. The quartz glass window and the infrared window are both pressed onto the flow pool substrate by the sealing ring and are fixed in a detachable manner by the window sealing ring flange.

[0008] Furthermore, the electromagnetic induction heating module heats the metal particles based on the principles of electromagnetic induction and skin effect, while the oil itself is not heated.

[0009] Furthermore, the quartz glass window is made of quartz or other non-conductive transparent materials; the infrared window is made of germanium, silicon, or other infrared transparent materials.

[0010] Furthermore, the slit height, width, and length of the slit flat surface structure are aligned with the direction of oil flow, and the size of the slit can be adjusted according to the detection requirements.

[0011] Furthermore, the two sides of the flow pool substrate are provided with connectors for connecting oil circuits, and the connectors are in the form of flanges, pagodas, or threaded holes.

[0012] The present invention also provides a method for detecting metal particles in oil based on the above-mentioned oil metal particle detection device, comprising: S1, a slit-flat structure that pumps the oil to be tested into the flow cell at a constant flow rate; S2. Start the electromagnetic induction heating module to heat the oil metal particles in the flow tank. S3. Acquire infrared images of the infrared window of the slit in the slit flat surface structure using an infrared thermal imager; S4. Identify and detect metal particles in oil based on the thermal signal of metal particles in infrared images.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The present invention achieves the effect of generating local thermal signals only for metal particles in the oil without disturbing the main body of the oil by placing an external electromagnetic induction heating module on one side of the flat slit of the flow pool and an external infrared thermal imager on the other side, and forming a sandwich sealing structure with a quartz glass window and an infrared window.

[0014] 2. This invention uses an alternating magnetic field to penetrate the quartz glass window and utilizes the skin effect to form an instantaneous heat source on the surface of the particles, achieving non-contact, chemical-free rapid heating and avoiding overheating and peeling of the particles or cracking of the oil.

[0015] 3. This invention uses an infrared thermal imager to directly collect the temperature field of the slit plane through the infrared window, obtaining a clear thermal contrast between particles and oil, expanding the single detection area and improving the visibility of tiny particles.

[0016] 4. This invention uses a flat slit combined with a laminar flow guiding structure to ensure that particles have a consistent residence time in the heating zone, thus ensuring that particles of the same size receive the same temperature rise and improving counting repeatability.

[0017] 5. This invention achieves in-situ series installation through a detachable flange sealing window and a compact integrated structure, eliminating the need to drain oil during maintenance and shortening downtime for maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the oil metal particle detection device based on electromagnetic infrared thermal imaging technology of the present invention.

[0020] Figure 2 This is a schematic diagram of the specially designed flow cell structure in the oil metal particle detection device based on electromagnetic infrared thermal imaging technology of the present invention.

[0021] Figure 3 The image shows the simulation results of the oil metal particle detection method based on electromagnetic infrared thermal imaging technology of this invention.

[0022] In the diagram: 1. Flow cell; 1-1. Slit flat surface structure; 1-2. Quartz glass window; 1-3. Infrared window; 1-4. Window sealing ring; 1-5. Window sealing ring flange; 1-6. Flow cell substrate; 2. Electromagnetic induction heating module; 3. Infrared thermal imager. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0027] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0030] like Figure 1 As shown, this invention provides an oil metal particle detection device based on electromagnetic infrared thermal imaging technology, comprising: a flow cell 1, an electromagnetic induction heating module 2, and an infrared thermal imager 3, wherein: The flow cell 1 is used to contain the oil to be tested and form a detection window, such as... Figure 2 As shown, the flow cell includes a flow cell substrate 1-6, a slit flat surface structure 1-1, a quartz glass window 1-2, and an infrared window 1-3. The slit flat surface structure 1-1 is disposed inside the flow cell substrate 1-6. The quartz glass window 1-2 is sealed and fixed to one side of the slit flat surface structure 1-1 and is located on the outer sidewall of the flow cell 1. The infrared window 1-3 is sealed and fixed to the other side of the slit flat surface structure 1-1 and is located on the opposite outer sidewall of the flow cell 1. The two ends of the flow cell 1 serve as an oil inlet and an oil outlet.

[0031] The electromagnetic induction heating module 2 is fixedly installed on the outside of the quartz glass window 1-2, and is used to inductively heat the metal particles in the slit flat surface structure 1-1 through the quartz glass window 1-2. The infrared thermal imager 3 is fixedly installed on the outside of the infrared window 1-3, and is used to collect infrared thermal images of the slit area of ​​the slit flat surface structure 1-1 through the infrared window 1-3 in order to identify the heated metal particles.

[0032] In specific implementation, as a preferred embodiment of the present invention, please refer to [reference needed]. Figure 2 The quartz glass window 1-2 and the infrared window 1-3 are both fixedly connected to the slit flat surface structure 1-1 through a sealing assembly, forming a sandwich structure.

[0033] In specific implementation, as a preferred embodiment of the present invention, please refer to [reference needed]. Figure 2 The sealing assembly includes a window sealing ring 1-4 and a window sealing ring flange 1-5. The quartz glass window 1-2 and the infrared window 1-3 are both pressed against the flow cell substrate 1-6 by the sealing ring 1-4 and are detachably fixed by the window sealing ring flange 1-5. In this embodiment, the quartz glass window 1-2 and the infrared window 1-3, along with their respective window sealing rings 1-4 and window sealing ring flanges 1-5, can be combined and fixed by means including but not limited to bolt combinations, threads, adhesive bonding, and welding.

[0034] In a preferred embodiment of the invention, the electromagnetic induction heating module 2 heats the metal particles based on the principles of electromagnetic induction and the skin effect, while the oil itself is not heated. In this embodiment, the electromagnetic induction heating module 2 can be designed in various styles according to specific detection requirements.

[0035] In a specific implementation, as a preferred embodiment of the present invention, the quartz glass window 1-2 is made of quartz or other non-conductive transparent material to avoid being heated by the electromagnetic induction heating module 2. Therefore, it can be any other material such as quartz. The infrared window 1-3 is made of germanium, silicon or other infrared transparent material, which is used by the camera to observe the oil in the slit flat surface of the specially designed flow cell and the thermal signal of the heated metal particles through the infrared window. Therefore, it can be any other material such as germanium or silicon.

[0036] In a specific implementation, as a preferred embodiment of the present invention, the slit height, width and length of the slit flat surface structure 1-1 are consistent with the direction of oil flow, and the size of the slit is adjusted according to the detection requirements.

[0037] In a specific implementation, as a preferred embodiment of the present invention, the two sides of the flow pool substrate 1-6 are provided with connectors for connecting oil circuits, and the connectors are in the form of flanges, pagodas, or threaded holes.

[0038] This invention also provides a method for detecting metal particles in oil based on the above-mentioned oil metal particle detection device, comprising: S1. The oil to be tested is pumped into the slit-flat surface structure 1-1 of the flow cell 1 through the oil inlet at a constant flow rate; S2. Start the electromagnetic induction heating module 2 to heat the oil metal particles in the flow pool through the electromagnetic induction heating module; S3. Infrared images of the infrared window 1-3 of the slit in the slit flat surface structure 1-1 are acquired by infrared thermal imager 3. S4. Identify and detect metal particles in oil based on the thermal signal of metal particles in infrared images, such as... Figure 3 The image shown is a simulation result.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil metal particle detection device based on electromagnetic infrared thermal imaging technology, characterized in that, include: The components include a flow cell (1), an electromagnetic induction heating module (2), and an infrared thermal imager (3), wherein: The flow cell (1) is used to contain the oil to be tested and form a detection window. It includes a flow cell substrate (1-6), a slit flat surface structure (1-1), a quartz glass window (1-2), and an infrared window (1-3). The slit flat surface structure (1-1) is located inside the flow cell substrate (1-6). The quartz glass window (1-2) is sealed and fixed to one side of the slit flat surface structure (1-1) and located on the outer sidewall of the flow cell (1). The infrared window (1-3) is sealed and fixed to the other side of the slit flat surface structure (1-1) and located on the opposite outer sidewall of the flow cell (1). The electromagnetic induction heating module (2) is fixedly installed on the outside of the quartz glass window (1-2) and is used to induction heat the metal particles in the slit flat surface structure (1-1) through the quartz glass window (1-2). The infrared thermal imager (3) is fixedly installed on the outside of the infrared window (1-3) and is used to collect infrared thermal images of the slit area of ​​the slit flat surface structure (1-1) through the infrared window (1-3) to identify the heated metal particles.

2. The oil metal particle detection device based on electromagnetic infrared thermal imaging technology according to claim 1, characterized in that, The quartz glass window (1-2) and the infrared window (1-3) are both fixedly connected to the slit flat surface structure (1-1) through a sealing assembly, forming a sandwich structure.

3. The oil metal particle detection device based on electromagnetic infrared thermal imaging technology according to claim 2, characterized in that, The sealing assembly includes a window sealing ring (1-4) and a window sealing ring flange (1-5). The quartz glass window (1-2) and the infrared window (1-3) are both pressed onto the flow cell substrate (1-6) by the sealing ring (1-4) and fixed in a detachable manner by the window sealing ring flange (1-5).

4. The oil metal particle detection device based on electromagnetic infrared thermal imaging technology according to claim 1, characterized in that, The electromagnetic induction heating module (2) heats the metal particles based on the principles of electromagnetic induction and skin effect, while the oil itself is not heated.

5. The oil metal particle detection device based on electromagnetic infrared thermal imaging technology according to claim 1, characterized in that, The quartz glass window (1-2) is made of quartz or other non-conductive transparent material; the infrared window (1-3) is made of germanium, silicon or other infrared transparent material.

6. The oil metal particle detection device based on electromagnetic infrared thermal imaging technology according to claim 1, characterized in that, The slit height, width, and length of the slit flat surface structure (1-1) are aligned with the direction of oil flow, and the size of the slit is adjusted according to the detection requirements.

7. The oil metal particle detection device based on electromagnetic infrared thermal imaging technology according to claim 3, characterized in that, The flow pool substrate (1-6) has joints on both sides for connecting oil circuits. The joints are in the form of flanges, pagodas, or threaded holes.

8. A method for detecting metal particles in oil, based on the apparatus for detecting metal particles in oil according to any one of claims 1 to 7, characterized in that, include: S1. The slit-flat surface structure (1-1) of the flow cell (1) is used to pump the oil to be tested into the flow cell (1) at a constant flow rate. S2. Start the electromagnetic induction heating module (2) to heat the oil metal particles in the flow pool through the electromagnetic induction heating module; S3. Infrared images of the infrared window (1-3) of the slit in the slit flat surface structure (1-1) are acquired by an infrared thermal imager (3); S4. Identify and detect metal particles in oil based on the thermal signal of metal particles in infrared images.

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