Holographic particle online detector

Abstract

The present application provides a holographic particle online detector, including: a housing, the housing including a protective shell, an imaging notch in the middle of the protective shell, the imaging notch is used to accommodate the material to be measured, and a laser component and an imaging component are respectively provided in the protective shell and on both sides of the imaging notch. The utility model is provided with a housing, by installing the laser component and the imaging component in the protective shell, and sealing with a sealing component, the volume of the device is reduced to facilitate carrying, and it is suitable for field use; after the laser generator generates laser, a conical light path is formed through a light cone forming plate, and the laser passes through the light-transmitting plate, the imaging notch and the second light-transmitting plate and then irradiates the CCD camera lens to image the particle distribution and quantity, the light path is simple, and the position of the CCD camera can be adjusted forward and backward to adapt to light cones of different sizes and samples of different sizes.

Description

Technical Field

[0001] The present application relates to the technical field of algae measuring equipment, in particular to a holographic particle online detector. Background Art

[0002] Excessive reproduction of algae is the main cause of ecological disasters such as algae blooms. The establishment of a monitoring and early warning system for algae and other aquatic organisms will help reduce the risk and cost of blue algae blooms. It is of great significance to water pollution prevention and control and the management of the lake chief system. There are generally two ways to measure algae or other fine particles in water bodies. One is optical backscattering, which infers the particle concentration by calculating the scattering attenuation of light by particles; the other is to use multi-spectrum or hyperspectral. Different algae will show different spectral characteristics when absorbing specific spectra. Both methods are indirect measurement methods and cannot obtain specific information about particulate matter. Later, holographic microscopy technology appeared. Using the wave characteristics of light, a light field superimposed by reference light fluctuations and diffracted light waves is obtained on CMOS, thereby obtaining the distribution of limited particles in the water body.

[0003] The existing laser holographic technology for microscopic particles in water has the following problems:

[0004] 1. The equipment is large in size and low in integration, which is not suitable for field working environment;

[0005] 2. The hardware cost of the equipment is high and the optical path is complex to build;

[0006] 3. Low detection accuracy. Utility Model Content

[0007] In order to solve the problems raised in the related art, the present application provides a holographic particle online detector with a simple structure and high measurement accuracy.

[0008] Specifically, the holographic particle online detector includes:

[0009] The housing comprises a protective shell, an imaging notch is provided in the middle of the protective shell, the imaging notch is used to accommodate the material to be measured, and a laser component and an imaging component are provided in the protective shell and on both sides of the imaging notch;

[0010] Sealing components are provided at both ends of the protective shell, and the protective shell and the sealing components are used to protect the laser component and the imaging component inside;

[0011] The laser assembly includes a laser generator, which is used to emit laser light to irradiate the material to be measured in the imaging gap;

[0012] The imaging component comprises a CCD camera, and the CCD camera is used for receiving laser light passing through a substance to be measured and forming an image.

[0013] Furthermore, the sealing assembly includes a front end cover, and a circular through hole is provided in the middle of the front end cover.

[0014] Furthermore, a front end cover seal is provided between the front end cover and the protective shell, and the front end cover seal is inserted into the protective shell.

[0015] Furthermore, the sealing assembly also includes a rear end cover, and two circular through holes are formed in the middle of the rear end cover.

[0016] Furthermore, a rear end cover seal is provided between the rear end cover and the protective shell, and the rear end cover seal is inserted into the protective shell.

[0017] Furthermore, the imaging gap is parallel to two ends of the protective shell, and the width of the imaging gap is 10 mm.

[0018] Furthermore, the laser assembly also includes a mounting plate, the laser generator is inserted into the center of the mounting plate, a light cone forming plate is provided on the front side of the mounting plate, and the light cone forming plate is closely attached to the end of the laser generator.

[0019] Furthermore, a light-transmitting plate fixing ring is provided on the front side of the light cone forming plate, the light-transmitting plate fixing ring is fixed to the side of the imaging notch close to the front end cover, and a light-transmitting plate is provided on the side of the light-transmitting plate fixing ring close to the imaging notch.

[0020] Furthermore, the imaging assembly also includes a second limiting ring, and a camera mounting plate is provided on the side of the second limiting ring facing the imaging notch, and the CCD camera is installed in the camera mounting plate, and the CCD camera can slide in the camera mounting plate.

[0021] Furthermore, the imaging assembly also includes a second light-transmitting plate fixing ring, which is located on the side of the imaging notch close to the rear end cover, and a second light-transmitting plate is provided on the side of the second light-transmitting plate fixing ring facing the imaging notch.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model is provided with a shell. By installing a laser component and an imaging component in the protective shell and sealing it with a sealing component, the volume of the device is reduced, which is convenient to carry and suitable for outdoor use. After the laser generator generates laser, a cone-shaped light path is formed through a light cone forming plate. The laser passes through a light-transmitting plate, an imaging notch and a second light-transmitting plate and then irradiates a CCD camera lens to image the distribution and quantity of particles. The light path is simple, and the position of the CCD camera can be adjusted forward and backward to adapt to light cones of different sizes and samples of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure provided for an implementation method of the present application;

[0025] Figure 2 A schematic diagram of a housing structure provided in one embodiment of the present application;

[0026] Figure 3 A schematic diagram of a cross-sectional structure of a housing provided in one embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of a laser assembly provided in one embodiment of the present application;

[0028] Figure 5 A schematic diagram of the structure of an imaging component provided in one embodiment of the present application.

[0029] Illustration Description:

[0030] 1. Shell; 11. Protective shell; 12. Imaging notch; 13. Front cover; 14. Front cover seal; 15. Rear cover; 16. Rear cover seal;

[0031] 2. Laser assembly; 21. Limiting ring; 22. Mounting plate; 23. Laser generator; 24. Light cone forming plate; 25. Transparent plate; 26. Transparent plate fixing ring;

[0032] 3. Imaging assembly; 31. Second limiting ring; 32. Camera mounting plate; 33. CCD camera; 34. Second light-transmitting plate; 35. Second light-transmitting plate fixing ring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] In this document, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0035] In addition, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the change of the orientation of the structure.

[0036] See also Figures 1 to 5 , an embodiment of the present application provides a holographic particle online detector, comprising:

[0037] The housing 1 comprises a protective shell 11 , an imaging notch 12 is arranged in the middle of the protective shell 11 , and the imaging notch 12 is used to accommodate the material to be measured. A laser component 2 and an imaging component 3 are arranged in the protective shell 11 and on both sides of the imaging notch 12 .

[0038] The protective shell 11 is made of 6061 aluminum alloy tube, and is subjected to an anodic oxidation blackening treatment to produce an oxide film on the surface, thereby improving the anti-oxidation performance of the protective shell 11 .

[0039] Sealing components are provided at both ends of the protective shell 11, and the protective shell 11 and the sealing components are used to protect the internal laser component 2 and the imaging component 3. The sealing component includes a front cover 13, and a circular through hole is provided in the middle of the front cover 13. A front cover seal 14 is provided between the front cover 13 and the protective shell 11, and the front cover seal 14 is inserted into the protective shell 11.

[0040] The front cover seal 14 and the front cover 13 are fixed by M3 screws. The front cover 13 is made of 6061 aluminum alloy and is anodized black.

[0041] The sealing assembly further comprises a rear end cover 15 , and two circular through holes are formed in the middle of the rear end cover 15 . A rear end cover seal 16 is provided between the rear end cover 15 and the protective shell 11 , and the rear end cover seal 16 is inserted into the protective shell 11 .

[0042] The rear cover 15 and the rear cover seal 16 are fixed by M3 screws. The rear cover seal 16 is made of 6061 aluminum alloy and is anodized black.

[0043] The imaging gap 12 is parallel to the two ends of the protective shell 11, and the width of the imaging gap 12 is 10 mm.

[0044] The water body to be detected can flow through the center of the imaging gap 12 .

[0045] The laser assembly 2 includes a laser generator 23, the laser generator 23 is used to emit laser irradiation imaging notch 12 in the material to be measured;

[0046] The laser generator 23 adopts a well-known laser emitting device.

[0047] The laser assembly 2 also includes a mounting plate 22 , a laser generator 23 is inserted into the center of the mounting plate 22 , a light cone forming plate 24 is provided on the front side of the mounting plate 22 , and the light cone forming plate 24 is close to the end of the laser generator 23 .

[0048] The laser assembly 2 also includes a limit ring 21. The limit ring 21 is fixedly connected to the mounting plate 22 by bolts. The outer diameters of the limit ring 21 and the mounting plate 22 are the same as the inner diameter of the protective shell 11, thereby ensuring that the axis of the laser generator 23 coincides with the axis of the protective shell 11. The light cone forming plate 24 is fixedly connected to the mounting plate 22 by bolts. There is a through hole in the middle of the light cone forming plate 24, and the aperture of the through hole in the middle of the light cone forming plate 24 is 1 μm.

[0049] A light-transmitting plate fixing ring 26 is provided on the front side of the light cone forming plate 24 . The light-transmitting plate fixing ring 26 is fixed to the imaging notch 12 close to the front end cover 13 . A light-transmitting plate 25 is provided on the side of the light-transmitting plate fixing ring 26 close to the imaging notch 12 .

[0050] The light-transmitting plate fixing ring 26 is fixedly connected to the mounting plate 22 by bolts, and the mounting plate 22 has the same inner diameter as the protective shell 11. The limiting ring 21, the mounting plate 22, the light cone forming plate 24 and the light-transmitting plate fixing ring 26 are made of 6061 aluminum alloy, all of which are anodized black.

[0051] The light-transmitting plate 25 is fixedly connected to the light-transmitting plate fixing ring 26 by bolts. The light-transmitting plate 25 is made of 3 mm high-transmittance acrylic, and the protective film is retained.

[0052] The imaging component 3 includes a CCD camera 33, which is used to receive the laser light passing through the substance to be measured and to form an image.

[0053] The physical size of the target surface of the CCD camera 33 and the selection of pixels need to satisfy the Nyquist and Shannon criteria.

[0054] The imaging assembly 3 further includes a second limiting ring 31 . A camera mounting plate 32 is provided on the side of the second limiting ring 31 facing the imaging gap 12 . A CCD camera 33 is mounted in the camera mounting plate 32 . The CCD camera 33 can slide in the camera mounting plate 32 .

[0055] The second limiting ring 31 and the camera mounting plate 32 are fixedly connected by bolts, and the outer diameter of the second limiting ring 31 is the same as the inner diameter of the protective shell 11. The CCD camera 33 is connected to the camera mounting plate 32 by bolts.

[0056] The imaging assembly 3 further includes a second light-transmitting plate fixing ring 35 , which is located on a side of the imaging notch 12 close to the rear end cover 15 , and a second light-transmitting plate 34 is provided on the side of the second light-transmitting plate fixing ring 35 facing the imaging notch 12 .

[0057] The second light-transmitting plate fixing ring 35 is fixedly connected to the second limiting ring 31 by bolts, and the outer diameter of the second light-transmitting plate fixing ring 35 is the same as the inner diameter of the protective shell 11. The second light-transmitting plate fixing ring 35 and the second limiting ring 31 cooperate to ensure that the axis of the CCD camera 33 coincides with the axis of the protective shell 11.

[0058] The second limiting ring 31, the camera mounting plate 32 and the second light-transmitting plate fixing ring 35 are made of 6061 aluminum material and are anodized black.

[0059] The second light-transmitting plate 34 is fixedly connected to the second light-transmitting plate fixing ring 35 by bolts. The second light-transmitting plate 34 is made of 3 mm high-transmittance acrylic, and the protective film is retained.

[0060] This application has at least one of the following advantages:

[0061] (1) By integrating the laser component 2 and the imaging component 3 into the protective shell 11 and sealing it with a sealing component, the size of the device is reduced, making it easy to carry and suitable for field use;

[0062] (2) Simplified design and simple optical path construction;

[0063] (3) The CCD camera 33 can be adjusted forward and backward, and the CCD camera 33 and the laser generator 23 can be changed to adapt to light cones of different sizes, thereby adapting to samples of different sizes.

[0064] The holographic particle online detector provided by the implementation method of the present application is introduced in detail above, and the principle and implementation method of the present application are explained by using specific examples. The above description is only used to help understand the method of the present application and its core mechanism; at the same time, for general technical personnel in this field, according to the ideas of the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. Holographic particle online detector, characterized in that: include: A housing (1), the housing (1) comprising a protective shell (11), an imaging notch (12) being provided in the middle of the protective shell (11), the imaging notch (12) being used to accommodate a substance to be measured, and a laser component (2) and an imaging component (3) being provided in the protective shell (11) and on both sides of the imaging notch (12); Sealing components are provided at both ends of the protective shell (11), and the protective shell (11) and the sealing component are used to protect the laser component (2) and the imaging component (3) inside; The laser assembly (2) comprises a laser generator (23), wherein the laser generator (23) is used to emit laser light to illuminate the material to be measured in the imaging notch (12); The imaging component (3) comprises a CCD camera (33), and the CCD camera (33) is used to receive laser light that passes through a substance to be measured and to form an image.

2. The holographic particle online detector according to claim 1, characterized in that: The sealing assembly comprises a front end cover (13), and a circular through hole is provided in the middle of the front end cover (13).

3. The holographic particle online detector according to claim 2, characterized in that: A front end cover seal (14) is provided between the front end cover (13) and the protective shell (11), and the front end cover seal (14) is inserted into the protective shell (11).

4. The holographic particle online detector according to claim 3 is characterized in that: The sealing assembly further comprises a rear end cover (15), wherein two circular through holes are provided in the middle of the rear end cover (15).

5. The holographic particle online detector according to claim 4, characterized in that: A rear end cover seal (16) is provided between the rear end cover (15) and the protective shell (11), and the rear end cover seal (16) is inserted into the protective shell (11).

6. The holographic particle online detector according to claim 5, characterized in that: The imaging notch (12) is parallel to two ends of the protective shell (11), and the imaging notch (12) has a width of 10 mm.

7. The holographic particle online detector according to claim 6, characterized in that: The laser assembly (2) further comprises a mounting plate (22), the laser generator (23) being inserted into the center of the mounting plate (22), a light cone forming plate (24) being provided on the front side of the mounting plate (22), and the light cone forming plate (24) being closely attached to the end of the laser generator (23).

8. The holographic particle online detector according to claim 7, characterized in that: A light-transmitting plate fixing ring (26) is provided on the front side of the light cone forming plate (24); the light-transmitting plate fixing ring (26) is fixed to a side of the imaging notch (12) close to the front end cover (13); and a light-transmitting plate (25) is provided on a side of the light-transmitting plate fixing ring (26) close to the imaging notch (12).

9. The holographic particle online detector according to claim 8, characterized in that: The imaging assembly (3) further comprises a second limiting ring (31), a camera mounting plate (32) being provided on the side of the second limiting ring (31) facing the imaging notch (12), the CCD camera (33) being mounted in the camera mounting plate (32), and the CCD camera (33) being able to slide in the camera mounting plate (32).

10. The holographic particle online detector according to claim 9, characterized in that: The imaging assembly (3) further comprises a second light-transmitting plate fixing ring (35), the second light-transmitting plate fixing ring (35) being located on a side of the imaging notch (12) close to the rear end cover (15), and a second light-transmitting plate (34) being provided on a side of the second light-transmitting plate fixing ring (35) facing the imaging notch (12).

Images