A condensing attachment for a near infrared spectrometer

Abstract

The utility model relates to near infrared spectrometer technical field, concretely relates to a kind of spotlight accessory for near infrared spectrometer, it includes accessory body, accessory body includes the light shield cover for covering at the detection end of spectrometer body;Two light sources are present at the detection end of spectrometer body;Light shield cover is equipped with the detection port for the light beam of two light sources to pass through respectively, sample can be placed at detection port, light shield cover is equipped with baffle;Baffle is rotatably matched at light shield cover by mounting piece, baffle is used to shield arbitrary detection port after rotation, so that the light beam of two light sources only passes through from one detection port;Through the light shield cover and baffle of the utility model, it can make the light beam of two light sources pass through from two detection ports by light shield cover, and when detecting small volume sample, only open one detection port makes the light beam of two light sources only pass through detection sample from the detection port, greatly reduce the light leakage amount, guarantee the accuracy of sample detection.

Description

Technical Field

[0001] This utility model relates to the field of near-infrared spectrometer technology, and more specifically, to a focusing accessory for a near-infrared spectrometer. Background Technology

[0002] Near-infrared spectroscopy analyzers are specialized equipment used in industrial production for the rapid detection of substance composition. Handheld models are easy to carry to the field for non-destructive testing of raw materials, semi-finished products, and finished products.

[0003] Existing handheld near-infrared spectrometers have a cylindrical main body with a detection end located at one end and two near-infrared light sources. However, when it is necessary to detect samples such as jujube seeds and safflower seeds, because the size of these samples is much smaller than the size of the detection end, only a portion of the light beam emitted from one light source illuminates the sample, resulting in a relatively serious light leakage phenomenon, which in turn affects the accuracy of the detection data. Summary of the Invention

[0004] This invention provides a focusing accessory for a near-infrared spectrometer, which overcomes some or all of the defects of the prior art.

[0005] According to the present invention, a focusing accessory for a near-infrared spectrometer includes an accessory body, the accessory body including a light-shielding cover for covering the detection end of the spectrometer body; the detection end of the spectrometer body has two light sources; the light-shielding cover is provided with detection ports for the light beams of the two light sources to pass through respectively, and a sample can be placed in the detection ports.

[0006] A baffle is provided at the light-shielding cover; the baffle is rotatably fitted at the light-shielding cover by the mounting parts, and the baffle is used to block any one of the detection ports after rotation, so that the beams of the two light sources pass through only one detection port.

[0007] The light-shielding cover and baffle of this invention allow the light beams from two light sources to pass through two detection ports. When detecting small-volume samples, only one detection port is opened so that the light beams from both light sources pass through that detection port, greatly reducing light leakage and ensuring the accuracy of sample detection.

[0008] Preferably, the mounting component includes a countersunk pin; the light shield and the baffle are respectively provided with a countersunk hole and a first through hole for the end of the countersunk pin to pass through; the end of the countersunk pin is provided with a stud; the diameter of the stud is smaller than the diameter of the countersunk pin, and it is threaded with a nut.

[0009] In this invention, the baffle can be detachably connected by the above-mentioned mounting components, which makes it easy to quickly remove the baffle when needed.

[0010] Preferably, a rubber ring is fitted at the countersunk pin, with the two ends of the rubber ring abutting against the nut and the baffle, respectively.

[0011] In this invention, the rubber ring creates a compression between the baffle and the rubber ring, thereby increasing friction and creating a damping effect, so that the baffle can be positioned at a certain position after rotation.

[0012] Preferably, the countersunk hole is opened from the side of the light-shielding cover closest to the detection end toward the other side.

[0013] In this invention, by setting the direction of the countersunk hole, the head of the countersunk pin can enter the countersunk hole, keeping the side of the light shield near the detection end flat and without protrusion, thereby ensuring that the detection end is not damaged by the protruding part.

[0014] Preferably, the light-shielding cover includes a cover plate for covering the detection end, a detection port and a baffle are disposed on the cover plate; the two ends of the cover plate are respectively provided with a ring-shaped circumferential ring and a collar; the inner diameter of the collar is larger than the diameter of the detection end, for the detection end to extend into; the collar is provided with a connecting component for fixing the accessory body to the detection end.

[0015] In this invention, the design of the retaining ring prevents the sample at the detection port from falling off the accessory body due to shaking or displacement when held.

[0016] Preferably, the connecting assembly includes two opposing clamps; the two clamps are arc-shaped with their inner arc surfaces facing each other; a rod is connected to the opposite side of the clamps; a second through hole is provided at the collar for the rod to pass through; a pull ring is detachably connected to one end of the rod that passes through the second through hole; a compression spring is fitted at the rod, with both ends of the compression spring abutting against the clamps and the collar respectively.

[0017] In this invention, the accessory body is held at the detection end of the spectrometer body by two clamps with spring action, allowing for quick assembly and disassembly of the accessory body at the detection end.

[0018] Preferably, the inner arc surface of the clamping plate is provided with several anti-slip strips spaced apart; the anti-slip strips are arranged along the axial direction of the collar.

[0019] In this invention, by setting the anti-slip strip and its direction, the friction force of the clamp and the detection end can be increased, ensuring that the accessory body is not easily loosened, ensuring that the detection port will not shift from the light source due to loosening, and that the accessory body will not be greatly affected by the anti-slip strip when it is installed or removed along the length of the spectrometer body.

[0020] Preferably, a guide plate is provided on the side of the clamping plate away from the cover plate, which is inclined relative to the clamping plate, and the two guide plates together form a figure-eight shape.

[0021] In this invention, the guide plate design allows the spectrometer's detection end to be directly inserted between the two guide plates and interlocked with the accessory body during installation, eliminating the need to pull the ring to open the two clamps and further improving installation efficiency.

[0022] Preferably, a glass plate is provided at the detection port to hold the sample.

[0023] In this invention, the glass plate allows the sample to be supported, and the distance between the light source and the sample can be adjusted by adjusting the distance between the accessory body and the light source.

[0024] Preferably, a lever is connected to the side of the baffle away from the detection end.

[0025] In this invention, the baffle is made easier to rotate by the setting of the lever. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the accessory body and the spectrometer body connected in Example 1;

[0027] Figure 2 This is a schematic diagram showing that both detection ports in Example 1 are covered.

[0028] Figure 3 This is a schematic diagram of the accessory body after it has been separated from the spectrometer body in Example 1;

[0029] Figure 4 This is a three-dimensional top view of the accessory body in Example 1;

[0030] Figure 5 This is a perspective bottom view of the accessory body in Example 1;

[0031] Figure 6 This is an exploded view of the accessory body in Example 1;

[0032] Figure 7 This is a schematic diagram of the mounting components in Example 1. Detailed Implementation

[0033] To further understand the content of this utility model, a detailed description of the utility model is provided in conjunction with the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the utility model.

[0034] Example 1

[0035] like Figure 1-7As shown, this embodiment provides a focusing accessory for a near-infrared spectrometer, which includes an accessory body 100. The accessory body 100 includes a light-shielding cover 420 for covering the detection end 311 of the spectrometer body 110. The detection end 311 of the spectrometer body 110 has two light sources 312. The light-shielding cover 420 is provided with detection ports 4210 for the light beams of the two light sources 312 to pass through respectively, and a sample can be placed in the detection ports 4210.

[0036] A baffle 430 is provided at the light-shielding cover 420; the baffle 430 is rotatably fitted at the light-shielding cover 420 via the mounting part 440. The baffle 430 is used to block any one of the detection ports 4210 after rotation, so that the beams of the two light sources 312 pass through only one detection port 4210.

[0037] Through the light-shielding cover 420 and baffle 430 in this embodiment, the light beams of the two light sources 312 can pass through the two detection ports 4210. Furthermore, when detecting small-volume samples, only one detection port 4210 is opened, allowing the light beams of the two light sources 312 to pass through only that detection port 4210, greatly reducing light leakage and ensuring the accuracy of sample detection. The spectrometer body 110 in this paper can be a handheld near-infrared spectrometer of model HHNIR21-1700, with its detection end 3... 11 is cylindrical in shape and has two light sources 312. The two light sources 312 have the same function. Larger samples can cover the detection end 311 and the beams of the two light sources 312 can completely illuminate the sample. However, samples the size of mung beans, such as safflower seeds and jujube kernels, cannot be completely illuminated by either light source 312. Therefore, the light beams of the two light sources 312 can be concentrated at the detection port 4210 by using the light shield 420 and the baffle 430. Placing the sample at the detection port 4210 can ensure that the concentrated beam of light is fully illuminated on the sample, so as to ensure the accuracy of the detection.

[0038] Meanwhile, the accessory body 100 can be quickly disassembled and assembled with the detection end 311 of the spectrometer body 110 through the connection component 450 and remain stable after installation;

[0039] The baffle 430 is fan-shaped, and its size can expose only one detection port 4210 or cover two detection ports 4210. When it is completely covered, it can play a role in dust protection. At this time, the accessory body 100 acts as a protective cover.

[0040] In this embodiment, the mounting component 440 includes a countersunk pin 741; the light shield 420 and the baffle 430 are respectively provided with a countersunk hole 5211 and a first through hole 632 for the end of the countersunk pin 741 to pass through; a stud 742 is provided at the end of the countersunk pin 741; the diameter of the stud 742 is smaller than the diameter of the countersunk pin 741, and a nut 744 is threadedly fitted.

[0041] The mounting component 440 in this embodiment allows the baffle 430 to be detachably connected via the nut 744 and the countersunk pin 741, making it easy to quickly remove the baffle 430 when needed.

[0042] In this embodiment, a rubber ring 743 is fitted at the countersunk pin 741, and the two ends of the rubber ring 743 are respectively abutted against the nut 744 and the baffle 430.

[0043] By setting the rubber ring 743 in this embodiment, the baffle 430 and the rubber ring 743 are squeezed together, thereby increasing the friction and forming a damping effect, so that the baffle 430 can be positioned in a certain position after rotation.

[0044] In this embodiment, the countersunk hole 5211 is opened from one side of the light-shielding cover 420 near the detection end 311 toward the other side.

[0045] By setting the opening direction of the countersunk hole 5211 in this embodiment, the head of the countersunk pin 741 can enter the countersunk hole 5211, so that the side of the light shield 420 near the detection end 311 remains flat and does not protrude, thereby ensuring that the detection end 311 is not damaged by the protruding position.

[0046] In this embodiment, the light-shielding cover 420 includes a cover plate 421 for covering the detection end 311, a detection port 4210 and a baffle 430 disposed at the cover plate 421; the two ends of the cover plate 421 are respectively provided with a ring-shaped circumferential ring 422 and a collar 423; the inner diameter of the collar 423 is larger than the diameter of the detection end 311, for the detection end 311 to extend into; the collar 423 is provided with a connecting component 450 for fixing the accessory body 100 at the detection end 311.

[0047] The inclusion of the retaining ring 422 in this embodiment ensures that the sample at the detection port 4210 will not fall off the accessory body 100 due to shaking or displacement when held.

[0048] In this embodiment, the connecting assembly 450 includes two opposing clamping plates 651; the two clamping plates 651 are arc-shaped and their inner arc surfaces face each other; a rod 652 is connected to the opposite side of the clamping plates 651; a second through hole 6230 is provided at the collar 423 for the rod 652 to pass through; a pull ring 654 is detachably connected to one end of the rod 652 that passes through the second through hole 6230; a compression spring 653 is sleeved on the rod 652, and the two ends of the compression spring 653 abut against the clamping plates 651 and the collar 423 respectively.

[0049] With the connection component 450 in this embodiment, the accessory body 100 can be clamped at the detection end 311 of the spectrometer body 110 by two clamps 651 with compression springs 653, allowing the accessory body 100 to be quickly installed and removed at the detection end 311; the pull ring 654 and the plug rod 652 are detachably connected by a threaded connection, which facilitates installation and replacement.

[0050] In this embodiment, a plurality of anti-slip strips 656 are provided at intervals on the inner arc surface of the clamping plate 651; the anti-slip strips 656 are arranged along the axial direction of the collar 423.

[0051] By setting the anti-slip strip 656 and its direction in this embodiment, the friction force of the circumferential movement between the clamp 651 and the detection end 311 can be increased, ensuring that the accessory body 100 is not easy to loosen, ensuring that the detection port 4210 will not shift between itself and the light source 312 due to loosening, and that the accessory body 100 will not be greatly affected by the anti-slip strip 656 when it is installed or removed along the length of the spectrometer body 110.

[0052] In this embodiment, a guide plate 655 is provided on the side of the clamping plate 651 away from the cover plate 421, which is inclined relative to the clamping plate 651. The two guide plates 655 together form a figure-eight shape.

[0053] By setting the guide plate 655 in this embodiment, when installing the accessory body 100, the detection end 311 of the spectrometer body 110 can be directly inserted between the two guide plates 655 and directly engaged with the accessory body 100, without having to pull the pull ring 654 to open the two clamps 651, thus further improving the installation efficiency.

[0054] In this embodiment, a glass plate 6212 is provided at the detection port 4210, and the glass plate 6212 is used to hold the sample.

[0055] The glass plate 6212 in this embodiment allows the sample to be supported, and the distance between the light source 312 and the sample can be adjusted by adjusting the distance between the accessory body 100 and the light source 312. Samples smaller than the detection port 4210 can be supported by the glass plate 6212. The glass plate 6212 is a transparent light-transmitting material, and the light-shielding cover 420 is a light-shielding material such as metal.

[0056] In this embodiment, a lever 431 is connected to the side of the baffle 430 away from the detection end 311.

[0057] The lever 431 in this embodiment makes it easier to rotate the baffle 430.

[0058] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0059] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited to this. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A focusing accessory for a near-infrared spectrometer, characterized in that: Includes an accessory body (100), which includes a light shield (420) for covering the detection end (311) of the spectrometer body (110); the detection end (311) of the spectrometer body (110) has two light sources (312); the light shield (420) is provided with a detection port (4210) for the light beams of the two light sources (312) to pass through respectively, and a sample can be placed in the detection port (4210); A baffle (430) is provided at the light shield (420); the baffle (430) is rotatably fitted at the light shield (420) via the mounting part (440). The baffle (430) is used to block any one of the detection ports (4210) after rotation, so that the beams of the two light sources (312) pass through only one detection port (4210).

2. A focusing accessory for a near-infrared spectrometer according to claim 1, characterized in that: The mounting component (440) includes a countersunk pin (741); the light shield (420) and the baffle (430) are respectively provided with a countersunk hole (5211) for the end of the countersunk pin (741) to pass through and a first through hole (632); a stud (742) is provided at the end of the countersunk pin (741); the diameter of the stud (742) is smaller than the diameter of the countersunk pin (741), and a nut (744) is threadedly fitted.

3. A focusing accessory for a near-infrared spectrometer according to claim 2, characterized in that: A rubber ring (743) is fitted at the countersunk pin (741), and the two ends of the rubber ring (743) are respectively pressed against the nut (744) and the baffle (430).

4. A focusing accessory for a near-infrared spectrometer according to claim 2, characterized in that: The countersunk hole (5211) is opened from the side of the light shield (420) near the detection end (311) towards the other side.

5. A focusing accessory for a near-infrared spectrometer according to claim 1, characterized in that: The light shield (420) includes a cover plate (421) for covering the detection end (311), a detection port (4210) and a baffle (430) disposed at the cover plate (421); the two ends of the cover plate (421) are respectively provided with a ring-shaped circumferential ring (422) and a collar (423); the inner diameter of the collar (423) is larger than the diameter of the detection end (311) for the detection end (311) to extend into; the collar (423) is provided with a connecting component (450) for fixing the accessory body (100) at the detection end (311).

6. A focusing accessory for a near-infrared spectrometer according to claim 5, characterized in that: The connecting assembly (450) includes two opposing clamps (651); the two clamps (651) are arc-shaped and their inner arc surfaces face each other; a rod (652) is connected to the opposite side of the clamps (651); a second through hole (6230) is provided at the collar (423) for the rod (652) to pass through; a pull ring (654) is detachably connected to one end of the rod (652) that passes through the second through hole (6230); a compression spring (653) is sleeved on the rod (652), and the two ends of the compression spring (653) abut against the clamps (651) and the collar (423) respectively.

7. A focusing accessory for a near-infrared spectrometer according to claim 6, characterized in that: The inner arc surface of the clamp (651) is provided with a number of anti-slip strips (656) spaced apart; the anti-slip strips (656) are arranged along the axial direction of the collar (423).

8. A focusing accessory for a near-infrared spectrometer according to claim 6, characterized in that: A guide plate (655) is provided on the side of the clamping plate (651) away from the cover plate (421), which is inclined relative to the clamping plate (651). The two guide plates (655) together form a figure-eight shape.

9. A focusing accessory for a near-infrared spectrometer according to claim 1, characterized in that: A glass plate (6212) is provided at the detection port (4210), and the glass plate (6212) is used to hold the sample.

10. A focusing accessory for a near-infrared spectrometer according to claim 1, characterized in that: A lever (431) is connected to the side of the baffle (430) away from the detection end (311).

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