Spectral diffuse reflection signal acquisition probe capable of switching light paths

Abstract

The utility model relates to a spectrum diffuse reflection signal acquisition probe capable of switching light paths, which comprises a fixed mounting rack, a linear slide rail device mounted on the fixed mounting rack, a light path switching module mounted on the linear slide rail device in a sliding manner, and a heat insulation connecting block fixed on the front surface of the fixed mounting rack above the linear slide rail device, a diffuse reflection probe fixing support is installed on the front face of the heat insulation connecting block and located above the light path switching module, a light source lamp and a light receiving assembly are installed on the diffuse reflection probe fixing support, an optocoupler is installed on the front face of the linear sliding rail device, and an optocoupler slice is installed on the side, facing the optocoupler, of the light path switching module. According to the utility model, the recovery response area and uniformity of diffuse reflection signals of an external sample can be effectively ensured; the structure design is more compact and small, assembling and debugging are convenient, measurement deviation caused by hardware assembling difference is eliminated to the maximum extent, the stability of collected signals is improved, and the wide application value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical detection instruments, in particular to a spectrum diffuse reflection signal acquisition probe capable of switching optical paths. Background Art

[0002] At present, the demand for automation and intelligence in industrial production is becoming increasingly prominent, and the realization of online detection is an important part of it. With the continuous advancement of online near-infrared analysis technology, the trend of using online near-infrared spectrometers to monitor production links in the field of industrial analysis is becoming more and more obvious. The working conditions in industrial environments are generally complex and diverse. Creating a good working environment for core components such as spectrometers is necessary to ensure the actual detection accuracy. If conditions permit, the spectrometers that are susceptible to interference are kept away from the industrial site, and only the light source probe is placed at the industrial site, it will greatly reduce the installation and protection requirements on site and expand the application scenarios of near-infrared instruments.

[0003] Due to the fluctuation of near-infrared light source and the influence of ambient temperature and humidity, the collected spectrum needs to be automatically calibrated in time to ensure the real-time update of the spectrum reference benchmark. During in-situ online testing in industrial environments, the morphology, particle size, uniformity, purity, impurities, etc. of the material to be tested are difficult to control. Near-infrared instruments need to collect as much representative sample information as possible to eliminate random analysis errors caused by sample inhomogeneity. Utility Model Content

[0004] The utility model aims to improve the stability of collected signals and provides a spectrum diffuse reflection signal collection probe with switchable optical paths.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A spectral diffuse reflection signal acquisition probe with switchable optical path comprises a fixed mounting frame, a linear slide device is mounted on the fixed mounting frame, an optical path switching module is slidably mounted on the linear slide device, a heat insulation connection block is fixed on the front of the fixed mounting frame above the linear slide device, a diffuse reflection probe fixing bracket is mounted on the front of the heat insulation connection block, the diffuse reflection probe fixing bracket is located above the optical path switching module, a light source lamp and a light receiving component are mounted on the diffuse reflection probe fixing bracket, an optical coupler is mounted on the front of the linear slide device, and an optical coupler slice is mounted on the side of the optical path switching module facing the optical coupler.

[0007] The optical path switching module includes a horizontal connecting plate slidably mounted on a linear slide rail device, a shading frame is connected to the front of the horizontal connecting plate, the shading frame runs through from top to bottom, a reference module fixing frame is arranged on the left side of the shading frame, and a reference module is installed in the reference module fixing frame.

[0008] The diffuse reflection probe fixing bracket includes a light receiving component fixing seat, and light source lamp fixing plates are symmetrically arranged on the left and right sides of the front of the light receiving component fixing seat. The light source lamp is fixed between the two light source lamp fixing plates by bolts, and the light source lamp is set to be inclined 30-45° toward the light receiving component.

[0009] The light receiving component comprises a converging sleeve and a collimating lens. The converging sleeve is fixed on a light receiving component fixing seat. The collimating lens is installed inside the light receiving component fixing seat and is located directly below the converging sleeve.

[0010] The beneficial effects of the utility model are as follows: the utility model can effectively ensure the recovery response area and uniformity of the external sample diffuse reflection signal, integrate the reference signal and sample signal acquisition into a set of diffuse reflection probes, automatically and regularly calibrate the influence of factors such as environmental temperature and humidity, light source energy, baseline drift, etc., and improve the measurement accuracy and reliability; the structural design is more compact and small, and the assembly and debugging are convenient, which can eliminate the measurement deviation caused by hardware assembly differences to the greatest extent, improve the stability of the acquisition signal, and has wide application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the optical path switching module and the optical coupler slice;

[0013] Figure 3 Schematic diagram of the diffuse reflectance probe fixing bracket;

[0014] Figure 4 This is a schematic diagram of the diffuse reflection probe fixing bracket after fixing the light source lamp and collimating lens;

[0015] Figure 5 This is a schematic diagram of the diffuse reflection probe fixing bracket after fixing the light source lamp, focusing sleeve and collimating lens;

[0016] Figure 6 is a schematic diagram of a fixed mounting frame;

[0017] Figure 7 is a schematic diagram of a linear slide device;

[0018] Figure 8 This is the light principle diagram of the utility model;

[0019] In the figure: 1-light path switching module; 2-fixed mounting frame; 3-diffuse reflection probe fixing bracket; 4-thermal insulation connection block; 5-linear slide device; 6-optical coupler; 7-optical coupler slice; 8-light source lamp; 9-light receiving component; 10-external sample;

[0020] 101- horizontal connection plate; 102- light shielding frame; 103- reference module fixing frame; 104- reference module;

[0021] 201-horizontal support plate; 202-vertical mounting plate;

[0022] 301-light receiving component fixing seat; 302-light source lamp fixing plate;

[0023] 501-U-shaped bracket; 502-lead screw; 503-drive motor; 504-nut seat;

[0024] 601-fixed ear plate;

[0025] 701-vertical slice; 702-connecting slice;

[0026] 901-converging sleeve; 902-collimating lens;

[0027] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0032] A spectral diffuse reflectance signal acquisition probe with switchable optical path, such as Figure 1 As shown, it includes an optical path switching module 1, a fixed mounting frame 2, a diffuse reflection probe fixing bracket 3, a heat insulation connecting block 4, a linear slide device 5, an optical coupler 6, an optical coupler slice 7, a light source lamp 8, and a light receiving component 9.

[0033] A linear slide device 5 is installed on the fixed mounting frame 2, and an optical path switching module 1 is slidably installed on the linear slide device 5. A heat insulation connecting block 4 is fixed on the front of the fixed mounting frame 2 above the linear slide device 5, and a diffuse reflection probe fixing bracket 3 is installed on the front of the heat insulation connecting block 4. The diffuse reflection probe fixing bracket 3 is located above the optical path switching module 1, and a light source lamp 8 and a light receiving component 9 are installed on the diffuse reflection probe fixing bracket 3. An optical coupler 6 is installed on the front of the linear slide device 5, and an optical coupler slice 7 is installed on the side of the optical path switching module 1 facing the optical coupler 6.

[0034] Optical path switching module 1 Figure 2 As shown, it includes a horizontal connecting plate 101 slidably mounted on the linear slide rail device 5, the front of the horizontal connecting plate 101 is connected to a shading frame 102, the shading frame 102 runs through from top to bottom, a reference module fixing frame 103 is provided on the left side of the shading frame 102, and a reference module 104 is installed in the reference module fixing frame 103.

[0035] Diffuse reflection probe fixing bracket 3 Figure 3 , Figure 4 , Figure 5 As shown, it includes a light receiving component fixing seat 301, and light source lamp fixing plates 302 are symmetrically provided on the left and right sides of the front of the light receiving component fixing seat 301. The light source lamp 8 is fixed between the two light source lamp fixing plates 302 by bolts, and the light source lamp 8 is set to face the light receiving component 9 and tilted at 30-45°.

[0036] The light receiving component 9 is as follows Figure 4 , Figure 5 As shown, it includes a converging sleeve 901 and a collimating lens 902. The converging sleeve 901 is fixed on the light receiving component fixing seat 301, and the collimating lens 902 is installed inside the light receiving component fixing seat 301 and is located directly below the converging sleeve 901. The converging sleeve 901 is connected to an external detector through a wire.

[0037] Optocoupler 6 Figure 7 As shown, it is a U-shaped structure, and the left and right sides of the optical coupler 6 are provided with fixed ear plates 601, and the fixed ear plates 601 are fixed to the front side of the linear slide device 5 by bolts.

[0038] Optocoupler slice 7 Figure 2As shown, it includes a vertical slice 701, which is flush with the U-shaped groove of the optical coupler 6. A connecting piece 702 is provided at the upper end of the back side of the vertical slice 701, and the connecting piece 702 is fixed to the side of the horizontal connecting plate 101 by bolts.

[0039] Fixed mounting bracket 2 Figure 6 As shown, it includes a horizontal support plate 201 and a vertical mounting plate 202 . The horizontal support plate 201 and the vertical mounting plate 202 are L-shaped structures. The linear slide rail device 5 is installed on the horizontal support plate 201 , and the insulation connection block 4 is fixed on the front side of the vertical mounting plate 202 .

[0040] Linear guide rail device 5 Figure 7 As shown, a U-shaped bracket 501 is fixed on the horizontal support plate 201, and a screw 502 is provided between the two side plates of the U-shaped bracket 501. A drive motor 503 is connected to one end of the screw 502, and the drive motor 503 is fixed on one side of the U-shaped bracket 501. A nut seat 504 is threadedly installed on the screw 502, and the horizontal connecting plate 101 is fixed on the top of the nut seat 504.

[0041] The light emitted by the light bulb of the light source lamp 8 is reflected and collimated by the aluminum reflector cup and then emitted. Figure 8 As shown, the linear slide rail device 5 drives the optical path switching module 1 to move, and realizes the switching of the reference optical path and the sample optical path in turn. After the light is irradiated to the external sample 10 or the reference module 104 respectively, the reflected light is received by the light receiving component 9 encapsulated in the diffuse reflection probe fixing bracket 3, and then transmitted through the optical fiber, and finally received by the external detector.

[0042] The light source lamp 8 and the light receiving component 9 are encapsulated in the diffuse reflection probe fixing bracket 3 at a certain angle. The light receiving component 9 includes a collimating lens 902 and a converging sleeve 901, wherein the installation angle of the light source lamp 8 can be fine-tuned as needed. The light source lamp 8 obliquely illuminates the external sample 10 at a certain angle, which can effectively reduce the light signal interference introduced by mirror reflection. In addition, the light source lamp 8 uses a reflective cup cover to collimate the light and then illuminates the sample. A large-size collimating lens 902 is set in the receiving light path, which can ensure the uniform distribution of the light emitted by the light source lamp 8 and effectively form a larger effective spot response area, so that the reflected light can feedback rich information about the external sample 10 and reduce the loss of external sample 10 information caused by differences in the uniformity of the external sample 10.

[0043] The optical path switching module 1 is integrated with a reference module 104 and a light shielding frame 102 and fixed on a linear slide device 5 , and the switching of the sample optical path, the reference optical path and the initial position is realized respectively through the linear slide device 5 .

[0044] The initial position is determined by moving the optical coupler slice 7 fixed on the optical path switching module 1 to the position of the optical coupler 6 fixed on the linear slide device 5 and cutting off the signal of the optical coupler 6 to ensure that each movement is performed first accurately reset and then moved to the corresponding irradiation position.

[0045] The provision of the heat-insulating connecting block 4 can prevent the heat generated by the light source lamp 8 from being directly transferred to the fixed mounting frame 2 and then transferred to the linear guide rail device 5, thereby causing aging of the electrical components.

[0046] The utility model can effectively ensure the recovery response area and uniformity of the diffuse reflection signal of the external sample 10, integrate the reference signal and sample signal acquisition into a set of diffuse reflection probes, automatically and regularly calibrate the influence of factors such as environmental temperature and humidity, light source energy, baseline drift, etc., and improve the measurement accuracy and reliability; the structural design is more compact and small, and the assembly and debugging are convenient, which can eliminate the measurement deviation caused by hardware assembly differences to the greatest extent, improve the stability of the collected signal, and has wide application value.

[0047] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or it is directly applied to other occasions without improvement, it is within the protection scope of the utility model.

Claims

1. A spectral diffuse reflectance signal acquisition probe with switchable optical path, characterized in that: The invention comprises a fixed mounting frame (2), a linear slide device (5) is mounted on the fixed mounting frame (2), an optical path switching module (1) is slidably mounted on the linear slide device (5), a heat insulation connection block (4) is fixed on the front of the fixed mounting frame (2) above the linear slide device (5), a diffuse reflection probe fixing bracket (3) is mounted on the front of the heat insulation connection block (4), the diffuse reflection probe fixing bracket (3) is located above the optical path switching module (1), a light source lamp (8) and a light receiving component (9) are mounted on the diffuse reflection probe fixing bracket (3), an optical coupler (6) is mounted on the front of the linear slide device (5), and an optical coupler slice (7) is mounted on the side of the optical path switching module (1) facing the optical coupler (6).

2. The spectral diffuse reflectance signal acquisition probe with switchable optical path according to claim 1, characterized in that: The optical path switching module (1) comprises a horizontal connecting plate (101) slidably mounted on a linear slide rail device (5); a light shielding frame (102) is connected to the front of the horizontal connecting plate (101); the light shielding frame (102) penetrates from top to bottom; a reference module fixing frame (103) is arranged on the left side of the light shielding frame (102); and a reference module (104) is installed in the reference module fixing frame (103).

3. The spectral diffuse reflectance signal acquisition probe with switchable optical path according to claim 2, characterized in that: The diffuse reflection probe fixing bracket (3) comprises a light receiving component fixing seat (301), and light source lamp fixing plates (302) are symmetrically arranged on the left and right sides of the front of the light receiving component fixing seat (301). The light source lamp (8) is fixed between the two light source lamp fixing plates (302) by bolts, and the light source lamp (8) is arranged to face the light receiving component (9) and be inclined at 30-45 degrees.

4. The spectral diffuse reflectance signal acquisition probe with switchable optical path according to claim 3, characterized in that: The light receiving assembly (9) comprises a converging sleeve (901) and a collimating lens (902); the converging sleeve (901) is fixed on the light receiving assembly fixing seat (301); the collimating lens (902) is installed inside the light receiving assembly fixing seat (301) and is located directly below the converging sleeve (901).

5. The spectral diffuse reflectance signal acquisition probe with switchable optical path according to claim 4, characterized in that: The optical coupler (6) is a U-shaped structure. Fixed ear plates (601) are provided on the left and right sides of the optical coupler (6). The fixed ear plates (601) are fixed to the front side of the linear slide rail device (5) by bolts.

6. The spectral diffuse reflectance signal acquisition probe with switchable optical path according to claim 5, characterized in that: The optical coupler slice (7) comprises a vertical slice (701), the vertical slice (701) is arranged flush with the U-shaped groove of the optical coupler (6), a connecting piece (702) is provided at the upper end of the back side of the vertical slice (701), and the connecting piece (702) is fixed to the side of the horizontal connecting plate (101) by bolts.

7. The spectral diffuse reflectance signal acquisition probe with switchable optical path according to claim 6, characterized in that: The fixed mounting frame (2) comprises a horizontal support plate (201) and a vertical mounting plate (202); the horizontal support plate (201) and the vertical mounting plate (202) are in an L-shaped structure; the linear slide rail device (5) is mounted on the horizontal support plate (201); and the heat insulating connection block (4) is fixed on the front side of the vertical mounting plate (202).

8. The spectral diffuse reflectance signal acquisition probe with switchable optical path according to claim 7, characterized in that: The linear slide rail device (5) is fixed to a U-shaped bracket (501) on a horizontal support plate (201); a lead screw (502) is provided between two side plates of the U-shaped bracket (501); one end of the lead screw (502) is connected to a drive motor (503); the drive motor (503) is fixed to one side of the U-shaped bracket (501); a nut seat (504) is screwed onto the lead screw (502); and a horizontal connecting plate (101) is fixed to the top of the nut seat (504).

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