Particle pollutant dynamic tracking device based on optical imaging

Abstract

The utility model discloses a particulate pollutant dynamic tracking device based on optical imaging. The particulate pollutant dynamic tracking device comprises a camera assembly, a telecentric lens, a bowl-shaped light source, an oil passing detection module and a reflective background plate, a photographic lens of the camera assembly is mounted at an eye position of a telecentric lens, and a bowl-shaped light source is mounted at an objective lens position of the telecentric lens; the center of the telecentric lens and the center of the bowl-shaped light source only share the same axis, and the telecentric lens and the bowl-shaped light source face the oil passing detection module; the oil passing detection module is provided with a micro-channel through which oil passes, the oil passing detection module is made of a transparent material, and the micro-channel is located in the observation range of the telecentric lens and the bowl-shaped light source; and the reflective background plate is arranged on one surface, back to the bowl-shaped light source, of the oil passing detection module, and corresponds to the bowl-shaped light source. The utility model aims to provide a particulate pollutant dynamic tracking device based on optical imaging, which can perform clear video acquisition on wear particles in flowing oil through an imaging environment and an imaging lens which can be matched with each other.

Description

Technical Field

[0001] The utility model relates to a mechanical equipment detection technology, in particular to a particle pollutant dynamic detection device based on optical video imaging. Background Art

[0002] The most typical wear particle analysis technologies and devices are the Online Visual Ferrograph (OLVF) and the Laser Net Fines (LNF). The principle of the Online Visual Ferrograph (OLVF) system is to use magnetic force to adsorb the wear particles in the oil flow to a plane, and then use a camera to photograph the wear particles. This system is similar to an analytical ferroscope. Since the wear particles are adsorbed by magnetic force, they always form aggregated chains. Although researchers have tried to separate these aggregated wear particles, it is still a problem to extract the characteristics of individual wear particles. In contrast, the automatic wear particle analyzer (LNF) system uses a flow cell instead of using magnetism to obtain the moving wear particles. The system uses a two-dimensional transmission image to extract the shape characteristics of the wear particles, and can directly project the morphological characteristics of the wear particles onto the CCD sensor. It has been widely used in wear state monitoring; among them, the automatic wear particle analyzer uses the transmitted light to reflect the shadow of the particles in the oil, and then calculates the size and number of the particles by the shadow. LNF cannot detect the material type of abrasive particles through particle color information; in the existing abrasive particle collection and imaging system, the imaging environment, the depth of field of the imaging lens and the depth of the microchannel are difficult to match, and the imaging suffers from dynamic blur and unclearness, which needs to be improved. Utility Model Content

[0003] In view of the above-mentioned defects, the purpose of the utility model is to propose a dynamic tracking device for particle contaminants based on optical imaging, which can clearly capture video of wear particles in flowing oil through an imaging environment and an imaging lens that can cooperate with each other.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A particle pollutant dynamic tracking device based on optical imaging, comprising a camera assembly, a telecentric lens, a bowl-shaped light source, an oil-through detection module and a reflective background plate;

[0006] The photographic lens of the camera assembly is installed at the eyepiece position of the telecentric lens, and a bowl-shaped light source is installed at the objective lens position of the telecentric lens;

[0007] The telecentric lens and the bowl-shaped light source have a single common axis, and the telecentric lens and the bowl-shaped light source face the oil flow detection module;

[0008] The oil flow detection module is provided with a microchannel for oil to flow through, the oil flow detection module is made of transparent material, and the microchannel is located within the observation range of the telecentric lens and the bowl-shaped light source;

[0009] The reflective background plate is disposed on a side of the oil flow detection module facing away from the bowl-shaped light source, and the reflective background plate corresponds to the bowl-shaped light source.

[0010] Preferably, comprising a base plate;

[0011] The camera assembly, telecentric lens, and bowl-shaped light source are all mounted on the base plate through a bracket;

[0012] The oil flow detection module and the reflective background plate are fixedly mounted on the base plate;

[0013] The central axes of the camera assembly, the telecentric lens, and the bowl-shaped light source are located on the same axis, and the oil-through detection module and the reflective background plate are located within the observation range of the telecentric lens and the bowl-shaped light source.

[0014] Preferably, it further comprises a shell, wherein the shell is covered on the base plate;

[0015] The top of the shell is a top cover part, and the sides of the shell are respectively provided with a display screen and a control switch;

[0016] The shell is provided with an oil inlet and an oil outlet.

[0017] Preferably, the oil inlet of the oil flow detection module is connected to the output port of a peristaltic pump through a pipeline, the peristaltic pump is installed on the inner wall of the housing, and the oil outlet of the oil flow detection module is connected to the oil pool.

[0018] Furthermore, the oil flow detection module is made of quartz material, the microchannel is connected to a multi-stage pressure balance pool, and the diameter of the pressure balance pool is larger than the diameter of the microchannel;

[0019] The micro-channel is relatively perpendicular to the observation plane of the telecentric lens.

[0020] Furthermore, the spherical inner concave surface of the bowl-shaped light source is a reflective surface, and a luminous ring is provided at the opening position of the spherical inner concave surface, and the irradiation direction of the luminous ring is toward the spherical inner concave surface.

[0021] Furthermore, it also includes a circuit board, wherein the circuit board is mounted on the base plate;

[0022] The signal lines of the camera assembly, the bowl-shaped light source, the display screen, the control switch, and the peristaltic pump are respectively connected to the control module of the circuit board.

[0023] One of the above technical solutions includes the following beneficial effects: First, this solution forms an illumination environment of incident light combined with reflected light by using a bowl-shaped light source in combination with a reflective background plate. The uniform light emitted by the bowl-shaped light source hits the particles, and the reflected light signal is easier to obtain. This design is more conducive to distinguishing the types of particle pollutants. The front and back sides of the oil-through detection module located between the bowl-shaped light source and the reflective background plate are fully illuminated in all directions, and the spherical uniform light formed on the surface of the sample to be tested is conducive to detecting the metal surface and defects of the curved surface. The transparent oil-through detection module will not have a lighting dead angle under this lighting environment, and the particles in the oil passing through the microchannel are not easy to produce shadows after being illuminated; under this lighting environment, the oil in the flow channel is detected by video in combination with a telecentric lens; the telecentric lens has the characteristics of accurate and consistent magnification and large depth of field, which can obtain the highest possible accuracy and avoid errors; this solution reduces the shortcomings of the two environments by upgrading the telecentric lens to cooperate with the lighting environment, thereby improving the detection accuracy of the device and enabling clear video acquisition of wear particles in the flowing oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model from an external perspective;

[0025] Figure 2 It is a schematic diagram of the internal structure of the overall structure of an embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional view of the main structure of an embodiment of the utility model;

[0027] Figure 4 It is a structural schematic diagram of an oil flow detection module in one embodiment of the utility model.

[0028] Among them: camera assembly 100, telecentric lens 200, bowl-shaped light source 300, oil flow detection module 400, microchannel 410, pressure balance tank 420, reflective background plate 500, base plate 600, housing 700, peristaltic pump 800, display screen 900. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] A particle pollutant dynamic tracking device based on optical imaging, comprising a camera assembly 100, a telecentric lens 200, a bowl-shaped light source 300, an oil-through detection module 400 and a reflective background plate 500;

[0031] The photographic lens of the camera assembly 100 is installed at the eyepiece position of the telecentric lens 200, and a bowl-shaped light source 300 is installed at the objective lens position of the telecentric lens 200;

[0032] The telecentric lens 200 and the bowl-shaped light source 300 are located on the same axis, and the telecentric lens 200 and the bowl-shaped light source 300 face the oil flow detection module 400;

[0033] The oil flow detection module 400 is provided with a micro channel 410 through which oil flows. The oil flow detection module 400 is made of a transparent material. The micro channel 410 is located within the observation range of the telecentric lens 200 and the bowl-shaped light source 300.

[0034] The reflective background plate 500 is disposed on a side of the oil flow detection module 400 facing away from the bowl-shaped light source 300 , and the reflective background plate 500 corresponds to the bowl-shaped light source 300 .

[0035] This solution first forms an illumination environment of incident light combined with reflected light by using a bowl-shaped light source 300 in conjunction with a reflective background plate 500. The uniform light emitted by the bowl-shaped light source hits the particles, and the reflected light signal is easier to obtain. This design is more conducive to distinguishing the types of particle pollutants. The front and back sides of the oil-through detection module 400 located between the bowl-shaped light source 300 and the reflective background plate 500 are fully illuminated in all directions. The spherical uniform light formed on the surface of the sample to be tested is conducive to detecting the metal surface and defects of the curved surface. The transparent oil-through detection module 400 will not have a lighting dead angle under this lighting environment, and the particles in the oil passing through the microchannel 410 are not easy to produce shadows after being illuminated; in this lighting environment, the oil in the flow channel is detected by video in conjunction with a telecentric lens; the telecentric lens has the characteristics of accurate and consistent magnification and large depth of field, which can obtain the highest possible accuracy and avoid errors; this solution reduces the shortcomings of the two environments by upgrading the telecentric lens to cooperate with the lighting environment, thereby improving the detection accuracy of the device and enabling clear video capture of wear particles in the flowing oil.

[0036] Wherein, a base plate 600 is included;

[0037] The camera assembly 100, the telecentric lens 200, and the bowl-shaped light source 300 are all mounted on the base plate 600 through a bracket;

[0038] The oil detection module 400 and the reflective background plate 500 are fixedly mounted on the base plate 600;

[0039] The central axes of the camera assembly 100 , the telecentric lens 200 , and the bowl-shaped light source 300 are located on the same axis, and the oil detection module 400 and the reflective background plate 500 are located within the observation range of the telecentric lens 200 and the bowl-shaped light source 300 .

[0040] The above devices are uniformly installed on the base plate 600, so that the relative position of the device is fixed, which is convenient for repeated use and position movement. The various components of this solution have no assembly relationship with each other, and are all fixedly installed on the base plate 600. The relative position relationship between each component is fixed, so when each component is replaced, only one component needs to be removed separately, which is very convenient to operate. The device adopts a modular structure, and in future use, the maintenance cost of replacing a single component is also lower.

[0041] The device further comprises a housing 700, wherein the housing 700 is covered on the base plate 600;

[0042] The top of the housing 700 is a top cover, and the sides of the housing 700 are respectively provided with a display screen 900 and a control switch;

[0043] The housing 700 is provided with an oil inlet and an oil outlet.

[0044] The device is encapsulated by a shell to form an integral structure, and the shell protects the internal structure. Since existing similar devices require an external display and are cumbersome to use, this solution integrates the display screen 900 into the device body, which enhances the integrity of the device and facilitates users to view information output on the screen when using it. The display screen 900 can be a flexible screen, and the screen is mounted on the shell through an angle adjustment mechanism, or mounted on the device in the form of a folding screen. When using the screen, the user can adjust the screen to a position that is convenient for use.

[0045] In addition, the oil inlet of the oil flow detection module 400 is connected to the output port of the peristaltic pump 800 through a pipeline. The peristaltic pump 800 is installed on the inner wall of the shell, and the oil outlet of the oil flow detection module 400 is connected to the oil pool.

[0046] The peristaltic pump conveys the oil to the oil detection module 400 .

[0047] In addition, the oil flow detection module 400 is made of quartz material, and the microchannel 410 is connected to a multi-stage pressure balance pool 420, and the diameter of the pressure balance pool 420 is larger than the diameter of the microchannel 410;

[0048] The microchannel 410 is relatively perpendicular to the observation plane of the telecentric lens 200 .

[0049] The volume of the pressure balance pool 420 is greater than that of the microchannel 410, and the multi-stage pressure balance pool 420 is used to balance the flow rate in the microchannel 410. The microchannel 410 is relatively perpendicular to the observation plane of the telecentric lens 200. Such a design is more conducive to particle detection, prevents particle sedimentation from being detrimental to observation, and prevents particles from blocking the microchannel.

[0050] In addition, the spherical inner concave surface of the bowl-shaped light source 300 is a reflective surface, and a light-emitting ring is provided at the opening position of the spherical inner concave surface, and the irradiation direction of the light-emitting ring is toward the spherical inner concave surface.

[0051] The light source faces upward, and combined with the reflective structure of the spherical inner concave surface, the light reflected from the spherical inner concave surface is fully and evenly emitted downward, which can reduce the shadow.

[0052] In addition, it also includes a circuit board, which is mounted on the base plate 600;

[0053] The signal lines of the camera assembly 100 , the bowl-shaped light source 300 , the display screen 900 , the control switch, and the peristaltic pump 800 are respectively connected to the control module of the circuit board.

[0054] The control module of the circuit board is used to control the camera assembly 100, the bowl-shaped light source 300, the display screen 900, the control switch, and the peristaltic pump 800, so as to facilitate the user to operate the various components of the device.

[0055] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A device for dynamic tracking of particle pollutants based on optical imaging, characterized in that: It includes camera assembly, telecentric lens, bowl-shaped light source, oil-through detection module and reflective background plate; The photographic lens of the camera assembly is installed at the eyepiece position of the telecentric lens, and a bowl-shaped light source is installed at the objective lens position of the telecentric lens; The telecentric lens and the bowl-shaped light source have a single common axis, and the telecentric lens and the bowl-shaped light source face the oil flow detection module; The oil flow detection module is provided with a microchannel for oil to flow through, the oil flow detection module is made of transparent material, and the microchannel is located within the observation range of the telecentric lens and the bowl-shaped light source; The reflective background plate is disposed on a side of the oil flow detection module facing away from the bowl-shaped light source, and the reflective background plate corresponds to the bowl-shaped light source.

2. The device for dynamic tracking of particle pollutants based on optical imaging according to claim 1, characterized in that: including a base plate; The camera assembly, telecentric lens, and bowl-shaped light source are all mounted on the base plate through a bracket; The oil flow detection module and the reflective background plate are fixedly mounted on the base plate; The central axes of the camera assembly, the telecentric lens, and the bowl-shaped light source are located on the same axis, and the oil-through detection module and the reflective background plate are located within the observation range of the telecentric lens and the bowl-shaped light source.

3. The device for dynamic tracking of particle pollutants based on optical imaging according to claim 2 is characterized in that: It also includes a shell, wherein the shell is covered on the base plate; The top of the shell is a top cover part, and the sides of the shell are respectively provided with a display screen and a control switch; The shell is provided with an oil inlet and an oil outlet.

4. The device for dynamic tracking of particle pollutants based on optical imaging according to claim 3 is characterized in that: The oil inlet of the oil flow detection module is connected to the output port of the peristaltic pump through a pipeline. The peristaltic pump is installed on the inner wall of the shell. The oil outlet of the oil flow detection module is connected to the oil pool.

5. The device for dynamic tracking of particle pollutants based on optical imaging according to claim 4, characterized in that: The oil flow detection module is made of quartz material, the microchannel is connected to a multi-stage pressure balance pool, and the diameter of the pressure balance pool is larger than the diameter of the microchannel; The micro-channel is relatively perpendicular to the observation plane of the telecentric lens.

6. The device for dynamic tracking of particle pollutants based on optical imaging according to claim 5, characterized in that: The spherical inner concave surface of the bowl-shaped light source is a reflective surface, and a luminous ring is provided at the opening position of the spherical inner concave surface, and the irradiation direction of the luminous ring is toward the spherical inner concave surface.

7. The device for dynamic tracking of particle pollutants based on optical imaging according to claim 6, characterized in that: Also included is a circuit board, the circuit board being mounted on the base plate; The signal lines of the camera assembly, the bowl-shaped light source, the display screen, the control switch, and the peristaltic pump are respectively connected to the control module of the circuit board.

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