Solid powder near-infrared analysis device and detection method thereof

Abstract

The invention discloses a solid powder near-infrared analysis device and a detection method thereof, and relates to the technical field of solid powder detection.The solid powder near-infrared analysis device comprises a powder bin, the powder bin is provided with a discharging port, and a bin door used for sealing the discharging port is arranged at the discharging port; the detection vessel is used for placing a to-be-detected sample; the placing table is arranged in the powder bin and is used for placing a detection vessel; the near-infrared light source is mounted in the powder bin and used for emitting near-infrared light; the light source reflecting mirror is rotationally arranged in the powder bin and used for reflecting near-infrared light, and the powder bin is provided with an adjusting mechanism used for adjusting the angle of the light source reflecting mirror; the spectrum collector is mounted in the powder bin and is used for receiving the near-infrared light reflected from the sample and converting the near-infrared light into a spectrum signal; and the data processing module is electrically connected with the spectrum collector and is used for receiving the spectrum signal and processing and analyzing the spectrum signal. The method has the effect of improving the accuracy and reliability of the detection result.

Description

Technical Field

[0001] The present application relates to the technical field of solid powder detection, and in particular to a solid powder near-infrared analysis device and a detection method thereof. Background Art

[0002] Near-infrared spectroscopy is a high-tech analytical technology that has developed rapidly in the field of analytical chemistry in recent years. The components of agricultural products such as protein, starch, crude fiber, and fat have hydrogen-containing groups and have specific absorption spectra in the near-infrared region. Each component has a specific absorption characteristic. The use of near-infrared analyzers to detect conventional components of feed has the characteristics of rapidity, accuracy, and low cost. It has been widely used in material component analysis, especially in the fields of industrial quality control, agricultural production, and food processing. It has significantly improved detection efficiency and accuracy and has become an indispensable and important means in modern industrial production. Near-infrared spectroscopy is not only used in the food industry, but also promoted in many fields such as chemical industry, pharmaceuticals, and environmental protection. It has played an important role in improving product quality and reducing production costs.

[0003] At present, conventional near-infrared analysis usually directly aims the light source and spectrum collector at the sample for detection. However, in the analysis of solid powder, due to the looseness and unevenness of the powder, and the different gaps and stacking states between the powder particles, the spectral information collection may be inaccurate, thus affecting the reliability of the detection results. Summary of the invention

[0004] In view of the problems existing in the prior art, the present application provides a solid powder near-infrared analysis device and a detection method thereof.

[0005] In the first aspect, the present application provides a solid powder near-infrared analysis device, which adopts the following technical solution: A near-infrared analysis device for solid powder, comprising A powder bin, wherein the powder bin is provided with a discharge port, and a bin door for closing the discharge port is provided at the discharge port; A test dish, used to place the sample to be tested; A placing table is arranged in the powder bin and is used for placing the test dish; A near-infrared light source is installed in the powder silo and is used to emit near-infrared light; A light source reflector is rotatably disposed in the powder bin and is used to reflect near-infrared light. The powder bin is provided with an adjustment mechanism for adjusting the angle of the light source reflector; A spectrum collector, installed in the powder bin, is used to receive near-infrared light reflected from the sample and convert it into a spectrum signal; The data processing module is electrically connected to the spectrum collector and is used to receive spectrum signals and perform processing and analysis.

[0006] Optionally, a positioning groove for placing the detection dish is provided on the placement table, and the positioning groove is adapted to the detection dish.

[0007] Optionally, the adjustment mechanism includes a worm wheel, a worm and a rotating handle, the worm wheel is coaxially fixedly connected to the rotating shaft of the light source reflector, the worm is rotatably arranged in the powder bin and meshes with the worm wheel, and the rotating handle is rotatably arranged on the powder bin and coaxially fixedly connected to the worm.

[0008] Optionally, an observation port is provided on the powder bin, and the observation port is sealed by a transparent glass plate.

[0009] Optionally, a cleaning rack is slidably arranged in the powder bin, a driving member for driving the cleaning rack to slide is arranged in the powder bin, a wiping plate is fixedly arranged on the cleaning rack, a wiping cloth is arranged on the wiping plate, and the wiping cloth is used to wipe the transparent glass plate.

[0010] Optionally, a plurality of nozzles are fixedly mounted on the cleaning rack, a water outlet end of each nozzle abuts against the rag, and a water supply assembly for supplying water to each nozzle is arranged in the powder bin.

[0011] Optionally, the water supply assembly includes a water tank and a water pump fixedly arranged in the powder silo, the water tank is connected to a water inlet pipe, a water inlet is opened on the powder silo, the water inlet pipe is connected to the water inlet, a sealing plug for closing the water inlet is provided at the water inlet, the water inlet end of the water pump is connected to the water tank, the water outlet end of the water pump is connected to a guide pipe, and each of the nozzles is connected to the guide pipe.

[0012] Optionally, the wiper plate is detachably arranged on the cleaning frame, an inspection opening is opened on the powder bin, and a cover for closing the inspection opening is arranged at the inspection opening.

[0013] In a second aspect, the present application provides a detection method of a solid powder near-infrared analysis device, which adopts the following technical solution: A detection method of a solid powder near-infrared analysis device comprises the following steps: S1. Place the sample to be tested in a test dish; S2. Open the discharge port of the powder silo, place the test dish on the placement table, and then close the silo door at the discharge port; S3, emitting near-infrared light through a near-infrared light source, adjusting the angle of the light source reflector, and reflecting the near-infrared light through the light source reflector onto the sample in the test dish; S4, receiving the near-infrared light reflected from the sample through a spectrum collector and converting it into a spectrum signal, and processing and analyzing the spectrum signal through a data processing module; S5. During the detection process, the angle of the light source reflector is adjusted multiple times, and multiple sets of spectral information are collected for comparative analysis.

[0014] Optionally, when placing the samples to be tested into the test dish, first determine three points in the test dish, and the three points are evenly spaced along the circumference of the test dish. Then, place a small amount of sample at the three selected points. Then, place the remaining samples to be tested into the test dish from the middle position of the three points. After all the samples to be tested are placed in the test dish, gently shake the test dish 1-2 times.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application places a sample to be tested in a test dish, and places the test dish on a placement table, emits near-infrared light through a near-infrared light source, adjusts the angle of a light source reflector, reflects the near-infrared light on the sample in the test dish through the light source reflector, receives the near-infrared light reflected from the sample through a spectrum collector and converts it into a spectral signal, and processes and analyzes the spectral signal through a data processing module. In the detection process, the angle of the light source reflector is adjusted multiple times to collect multiple sets of spectral information for comparative analysis, thereby effectively improving the accuracy and reliability of the detection result.

[0016] 2. In the present application, three points are determined in the test dish. When the sample to be tested is placed in the test dish, a small amount of sample is first placed in each of the three selected points, and then the remaining sample to be tested is placed in the test dish from the middle position of the three points. After that, the test dish only needs to be gently shaken 1-2 times to make the sample evenly distributed in the test dish. There is no need to excessively shake the test dish to improve the uniformity of the distribution of the sample in the test dish, and effectively avoid the stratification of the sample in the test dish due to excessive shaking of the test dish, reduce the detection error caused by uneven sample distribution, so that more consistent and stable spectral information can be obtained when near-infrared light is irradiated, and the accuracy and reliability of near-infrared spectral detection are further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the powder bin used to express the interior of the powder bin in the embodiment of the present application; Figure 3 yes Figure 2 A magnified view of part A; Figure 4 It is a schematic diagram of the structure of the cleaning rack used in the embodiment of the present application; Figure 5 yes Figure 4 A magnified view of part B; Figure 6 yes Figure 4 Magnified view of section C.

[0018] Explanation of the reference numerals: 1. powder silo; 11. discharge port; 111. silo door; 12. observation port; 13. worm; 14. handle; 15. drive member; 16. inspection port; 161. cover; 17. water tank; 171. water inlet pipe; 18. water pump; 181. flow guide pipe; 19. water inlet; 191. sealing plug; 2. test dish; 3. placement table; 31. positioning groove; 4. near-infrared light source; 5. spectrum collector; 51. data processing module; 6. light source reflector; 61. worm gear; 7. cleaning rack; 71. wiping board; 711. wiping cloth; 72. nozzle. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-6 This application is described in further detail.

[0020] The present application embodiment discloses a solid powder near infrared analysis device. Figure 1 , including a powder silo 1 and a testing dish 2, a placing table 3 is fixedly arranged in the powder silo 1, a discharge port 11 and an observation port 12 are opened in the powder silo 1, the observation port 12 is sealed by a transparent glass plate, a silo door 111 is hinged at the discharge port 11, the silo door 111 is used to close the discharge port 11, and the silo door 111 is fixed at the discharge port 11 by a lock.

[0021] Reference Figure 1 , 2 A positioning groove 31 for placing the detection dish 2 is provided on the placement table 3. The positioning groove 31 is matched with the detection dish 2 to ensure that the detection dish 2 is accurately and fixedly positioned when placed.

[0022] Reference Figure 2 , 3 A near-infrared light source 4 and a spectrum collector 5 are respectively installed in the powder bin 1, and the spectrum collector 5 is electrically connected to the data processing module 51. A light source reflector 6 is also provided in the powder bin 1. The light source reflector 6 adopts a plane mirror or a concave mirror. The sample to be detected is placed in the detection dish 2, and the detection dish 2 is placed in the positioning groove 31 on the placement table 3. The near-infrared light source 4 emits near-infrared light, and the near-infrared light is reflected on the sample in the detection dish 2 by the light source reflector 6. The near-infrared light reflected from the sample is received by the spectrum collector 5 and converted into a spectrum signal, and the spectrum signal is processed and analyzed by the data processing module 51, so as to realize the detection of the sample powder.

[0023] Reference Figure 3The light source reflector 6 is rotatably arranged in the powder bin 1. The powder bin 1 is provided with an adjusting mechanism for adjusting the angle of the light source reflector 6. The adjusting mechanism includes a worm gear 61, a worm 13 and a rotating handle 14. The worm gear 61 is coaxially fixedly connected with the rotating shaft of the light source reflector 6. The worm 13 is rotatably arranged in the powder bin 1 and meshes with the worm gear 61. The rotating handle 14 is rotatably arranged on the powder bin 1 and coaxially fixedly connected with the worm 13. During the detection process, the angle of the light source reflector 6 is adjusted multiple times to change the reflection path of the near-infrared light, thereby collecting multiple groups of spectral information for comparative analysis, which effectively improves the accuracy and reliability of the detection results.

[0024] Reference Figure 4 , 5 A cleaning rack 7 is slidably arranged in the powder bin 1 and located at the observation port 12. A wiping plate 71 is fixed to the cleaning rack 7 by screws. A wiping cloth 711 is arranged on the wiping plate 71. A driving member 15 for driving the cleaning rack 7 to slide is arranged in the powder bin 1. The driving member 15 includes a rodless cylinder, which is fixedly arranged in the powder bin 1, and a piston of the rodless cylinder is fixedly connected to the cleaning rack 7. The cleaning rack 7 is driven to slide by the rodless cylinder, and the transparent glass plate is wiped by the wiping cloth 711, thereby realizing automatic cleaning of the transparent glass plate and ensuring the cleanliness of the transparent glass plate.

[0025] Reference Figure 4 , 5 An inspection port 16 is provided on the powder silo 1, and a cover 161 is hinged at the inspection port 16. The cover 161 is adapted to the inspection port 16 and is used to close the inspection port 16. The cover 161 is also fixed at the inspection port 16 by a lock. When the rag 711 needs to be replaced or cleaned, the cleaning rack 7 is driven to move to the inspection port 16. By opening the cover 161 at the inspection port 16, the rag 711 can be replaced or cleaned.

[0026] Reference Figure 4 , 5 A plurality of nozzles 72 are fixedly arranged on the cleaning frame 7, and the water outlet end of each nozzle 72 is in contact with the wiping cloth 711. A water supply assembly for supplying water to each nozzle 72 is arranged in the powder bin 1, and the water supply assembly includes a water tank 17 and a water pump 18 fixedly arranged in the powder bin 1. The water inlet end of the water pump 18 is connected to the water tank 17, and the water outlet end of the water pump 18 is connected to a guide pipe 181. Each of the nozzles 72 is connected to the guide pipe 181, and the water in the water tank 17 is transported to each nozzle 72 through the water pump 18 to soak the wiping cloth 711, thereby improving the cleaning effect on the transparent glass plate.

[0027] Reference Figure 6The water tank 17 is connected to a water inlet pipe 171, a water inlet 19 is provided on the powder silo 1, the water inlet pipe 171 is connected to the water inlet 19, a sealing plug 191 for closing the water inlet 19 is provided at the water inlet 19, an external thread is provided on the sealing plug 191, and a water inlet 19 adapted to the sealing plug 191 is provided at the water inlet 19. By opening the sealing plug 191 at the water inlet 19, the water tank 17 can be replenished with water.

[0028] The implementation principle of a near-infrared analysis device for solid powder in an embodiment of the present application is as follows: by placing a sample to be tested in a test dish 2, and placing the test dish 2 in a positioning groove 31 on a placement table 3, emitting near-infrared light through a near-infrared light source 4, adjusting the angle of a light source reflector 6, reflecting the near-infrared light on the sample in the test dish 2 through the light source reflector 6, receiving the near-infrared light reflected from the sample through a spectrum collector 5 and converting it into a spectrum signal, and processing and analyzing the spectrum signal through a data processing module 51, and in the detection process, by adjusting the angle of the light source reflector 6 multiple times to change the reflection path of the near-infrared light, thereby collecting multiple sets of spectrum information for comparative analysis, thereby effectively improving the accuracy and reliability of the detection results.

[0029] The present application also discloses a detection method of a solid powder near-infrared analysis device, comprising the following steps: S1, placing the sample to be tested in the test dish 2; S2, open the discharge port 11 of the powder bin 1, place the test dish 2 on the placement table 3, and then close the bin door 111 at the discharge port 11; S3, emitting near-infrared light through the near-infrared light source 4, adjusting the angle of the light source reflector 6, and reflecting the near-infrared light through the light source reflector 6 onto the sample in the detection dish 2; S4, receiving the near-infrared light reflected from the sample through the spectrum collector 5 and converting it into a spectrum signal, and processing and analyzing the spectrum signal through the data processing module 51; S5. During the detection process, the angle of the light source reflector 6 is adjusted multiple times, and multiple groups of spectral information are collected for comparative analysis.

[0030] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A near-infrared analysis device for solid powder, characterized in that: include A powder material bin (1), wherein the powder material bin (1) is provided with a discharge port (11), and a bin door (111) is provided at the discharge port (11) for closing the discharge port (11); A test dish (2) for placing a sample to be tested; A placement table (3) is arranged in the powder bin (1) and is used to place the detection dish (2); A near-infrared light source (4) is installed in the powder bin (1) and is used to emit near-infrared light; A light source reflector (6) is rotatably disposed in the powder bin (1) and is used to reflect near-infrared light; the powder bin (1) is provided with an adjustment mechanism for adjusting the angle of the light source reflector (6); A spectrum collector (5) is installed in the powder bin (1) and is used to receive near-infrared light reflected from the sample and convert it into a spectrum signal; The data processing module (51) is electrically connected to the spectrum collector (5) and is used to receive spectrum signals and perform processing and analysis.

2. A solid powder near-infrared analysis device according to claim 1, characterized in that: The placement table (3) is provided with a positioning groove (31) for placing the detection dish (2), and the positioning groove (31) is adapted to the detection dish (2).

3. A solid powder near-infrared analysis device according to claim 2, characterized in that: The adjustment mechanism comprises a worm wheel (61), a worm (13) and a rotating handle (14); the worm wheel (61) is coaxially fixedly connected to the rotating shaft of the light source reflector (6); the worm (13) is rotatably arranged in the powder bin (1) and meshes with the worm wheel (61); and the rotating handle (14) is rotatably arranged on the powder bin (1) and coaxially fixedly connected to the worm (13).

4. A solid powder near-infrared analysis device according to claim 1, characterized in that: The powder bin (1) is provided with an observation port (12), and the observation port (12) is sealed by a transparent glass plate.

5. A solid powder near-infrared analysis device according to claim 4, characterized in that: A cleaning rack (7) is slidably arranged in the powder bin (1), a driving member (15) for driving the cleaning rack (7) to slide is arranged in the powder bin (1), a wiping plate (71) is fixedly arranged on the cleaning rack (7), a wiping cloth (711) is arranged on the wiping plate (71), and the wiping cloth (711) is used for wiping a transparent glass plate.

6. A solid powder near-infrared analysis device according to claim 5, characterized in that: A plurality of nozzles (72) are fixedly arranged on the cleaning frame (7), and the water outlet end of each nozzle (72) is in contact with the wiping cloth (711). A water supply component for supplying water to each nozzle (72) is arranged in the powder bin (1).

7. A solid powder near-infrared analysis device according to claim 6, characterized in that: The water supply assembly comprises a water tank (17) and a water pump (18) fixedly arranged in the powder silo (1); the water tank (17) is connected to a water inlet pipe (171); a water inlet (19) is provided on the powder silo (1); the water inlet pipe (171) is connected to the water inlet (19); a sealing plug (191) for sealing the water inlet (19) is provided at the water inlet (19); the water inlet end of the water pump (18) is connected to the water tank (17); the water outlet end of the water pump (18) is connected to a guide pipe (181); and each of the nozzles (72) is connected to the guide pipe (181).

8. The solid powder near-infrared analysis device according to claim 5, characterized in that: The wiper plate (71) is detachably arranged on the cleaning frame (7); an inspection opening (16) is provided on the powder bin (1); and a cover (161) for closing the inspection opening (16) is provided at the inspection opening (16).

9. A detection method based on the solid powder near-infrared analysis device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. placing the sample to be tested in a test dish (2); S2, opening the discharge port (11) of the powder bin (1), placing the test dish (2) on the placement table (3), and then closing the bin door (111) at the discharge port (11); S3, emitting near-infrared light through the near-infrared light source (4), adjusting the angle of the light source reflector (6), and reflecting the near-infrared light through the light source reflector (6) onto the sample in the detection dish (2); S4, receiving the near-infrared light reflected from the sample through the spectrum collector (5) and converting it into a spectrum signal, and processing and analyzing the spectrum signal through the data processing module (51); S5. During the detection process, the angle of the light source reflector (6) is adjusted multiple times, thereby collecting multiple sets of spectral information for comparative analysis.

10. The detection method of a solid powder near-infrared analysis device according to claim 9, characterized in that: When placing the sample to be tested into the test dish (2), first determine three points in the test dish (2), and the three points are evenly spaced along the circumference of the test dish (2). Then, a small amount of sample is placed in each of the three selected points. Then, the remaining sample to be tested is placed in the test dish (2) from the middle of the three points. After all the samples to be tested are placed in the test dish (2), the test dish (2) is gently shaken 1-2 times.

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