Device and method for detecting content of trichloropropanol ester in rapeseed oil

Abstract

The invention belongs to the technical field of food safety detection, and discloses a device and method for detecting the content of trichloropropanol ester in rapeseed oil, the device comprises a machine body, a detector is installed in the machine body, a feeding assembly and a protection assembly are arranged in the machine body, the feeding assembly comprises two moving tables arranged in the machine body, and the number of the moving tables is two. A first threaded rod and a first limiting shaft are installed in the two sides of the two moving tables respectively, a first motor is installed at one end of the first threaded rod, the protection assembly comprises a protection plate installed in the machine body in a sliding mode, and when the content of trichloropropanol ester in the rapeseed oil needs to be detected, a second motor is started firstly, the protection plate slides into the machine body, and then the trichloropropanol ester in the rapeseed oil is detected; then a detection sample is placed in the bearing table below the detector, and is moved upwards to the two sides of the bearing table below the detector through the protection plate, so that the bearing table is in a relatively sealed environment for detection, and the accuracy of a detection result is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of food safety detection, and specifically relates to a device and method for detecting the content of 3-monochloropropane-1,2-diol esters in rapeseed oil. Background Art

[0002] During the refining process of rapeseed oil, especially in the deodorization stage, due to high temperature and long-time heating, some components in the oil may undergo structural changes, resulting in the formation of 3-chloropropane-1,2-diol esters. To ensure food safety, countries and regions have formulated limit standards for 3-chloropropane-1,2-diol esters in food. For edible oils such as rapeseed oil, the content of its 3-chloropropane-1,2-diol esters should be strictly controlled below the limit standard. The detection methods usually include techniques with high sensitivity and good separation effect such as gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS);

[0003] After retrieval, for example, in the patent: CN210401337U, a gas chromatography-mass spectrometry instrument, including a machine body, a detector, and a sample detection table. A frame is arranged on the upper surface of the machine body. The front and rear sides of the frame are connected by a connecting frame and a U-shaped bracket. A guide rail groove is arranged on the right side of the bracket. A sliding seat is slidably installed in the guide rail groove, and the bottom of the right side of the sliding seat extends outside the guide rail groove and is fixedly connected to the top of the detector. In this gas chromatography-mass spectrometry instrument, the test tube sample on the sample detection table is moved below the detector through mechanical operation, reducing the workload. Moreover, the detection position in the front and rear directions of the detector can be changed according to the positions of the test tubes containing different samples on the sample detection table, avoiding the trouble of manually moving the test tube sample on the sample detection table below the detector by the experimenter, and greatly improving the work efficiency;

[0004] During the process of batch detecting the content of 3-chloropropane-1,2-diol esters in rapeseed oil, although the automatic movement of the sample detection table below the detector for detection can be achieved, batch detection involves a large number of samples. As a result, during the waiting period for detection, the unsaturated fatty acids in rapeseed oil are exposed to air for a long time and are prone to oxidation reactions. Oxidation products such as peroxides and aldehydes generated by these reactions may interfere with the detection of 3-MCPD esters, thereby affecting the accuracy of the detection results. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for detecting the content of 3-chloropropane-1,2-diol esters in rapeseed oil to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A device for detecting the content of 3-chloropropane-1,2-diol esters in rapeseed oil, including a machine body, a detector is installed inside the machine body, and a feeding component and a protection component are arranged inside the machine body;

[0007] The feeding component includes a moving platform arranged inside the machine body. There are two moving platforms. Inside both of the two moving platforms, a bearing platform is installed. On the tops of the two bearing platforms, test tubes are evenly arranged. Inside the two sides of each moving platform, a first threaded rod and a first limiting shaft are respectively installed. One end of the first threaded rod is installed with a first motor;

[0008] The protection component includes a protection plate slidably installed inside the machine body. There are two symmetrically arranged protection plates. At the bottoms of the two protection plates, second threaded rods are threadedly connected. At the bottom ends of the two second threaded rods, second motors are installed.

[0009] As a further technical solution of the present invention, a sealing gasket is installed on one side of the protection plate.

[0010] As a further technical solution of the present invention, the bearing platform is embedded inside the moving platform, and the bearing platform is slidably connected to the moving platform.

[0011] As a further technical solution of the present invention, protective covers are arranged on both sides inside the machine body, and the protective covers are arranged above the bearing platform.

[0012] As a further technical solution of the present invention, moving plates are arranged at the bottoms of both sides of the protective cover. Inside the inner walls of the two moving plates, a second limiting shaft and a third limiting shaft are embedded. Between the two second limiting shafts, transmission is carried out through a second pulley group. On the outer wall of one of the second limiting shafts, a first pulley group is installed. The end of the first pulley group away from the second limiting shaft is installed on the outer wall of the second threaded rod.

[0013] As a further technical solution of the present invention, the moving plate is slidably connected to the protective cover.

[0014] As a further technical solution of the present invention, the protective cover is slidably connected to both the second limiting shaft and the third limiting shaft.

[0015] As a further technical solution of the present invention, springs are arranged on the top of the protective cover, and there are two symmetrically arranged springs.

[0016] As a further technical solution of the present invention, one side of the inner wall of the protective cover is rotatably connected to a rotating shaft. At both ends of the rotating shaft, a rotating block and a gear are respectively fixedly installed. On both sides of the gear, rack plates are meshed. At one end of each of the two rack plates, a clamping block is fixedly installed. At one end of each clamping block, a clamping groove is arranged, and the clamping groove is opened on the inner wall of the machine body.

[0017] A method for detecting the content of trichloropropanol esters in rapeseed oil by a device, includes the following steps:

[0018] S1: When it is necessary to detect the content of 3-MCPD esters in rapeseed oil, first slide the protective cover upward, then rotate the rotating block. The rotation of the rotating block drives the rotation of the rotating shaft, the rotation of the rotating shaft drives the rotation of the gear, the rotation of the gear drives the two rack plates to move outward, and the movement of the two rack plates drives one end of the block to slide out of the protective cover and embed into the card slot to fix the position of the protective cover. Then place the sample. After placing, move the protective cover to the top of the bearing table;

[0019] S2: Then start the second motor. When the second motor starts, it drives the second threaded rod to rotate. The rotation of the second threaded rod drives the movement of the protective plate, so that the protective plate slides into the machine body;

[0020] S3: Then place the test sample into the bearing table under the detector, and then move the protective plate upward to both sides of the bearing table under the detector, so that the bearing table is in a relatively sealed environment for detection;

[0021] S4: After the rapeseed oil sample in the bearing table under the detector is detected, control the two protective plates to slide downward into the machine body again. At the same time, the rotation of the second threaded rod drives the second limit shaft to rotate through the first pulley group transmission, and the rotation of the second limit shaft drives another second limit shaft to rotate through the second pulley group transmission. The rotation of the two second limit shafts drives the two moving plates to move upward, and the movement of the moving plates drives the movement of the protective cover, so that the protective cover moves away from above the bearing table;

[0022] S5: Then control the first motor to start through the PLC. When the first motor starts, it drives the two moving platforms to move. The movement of the moving platforms drives the movement of the bearing table, so that one bearing table moves away from under the detector, and the other bearing table carrying the sample to be detected moves into the position under the detector. Finally, repeat the above operations for continuous detection.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. Through the cooperation of the feeding component and the protection component, when it is necessary to detect the content of trichloropropanol esters in rapeseed oil, first start the second motor. When the second motor starts, it drives the second threaded rod to rotate. The rotation of the second threaded rod drives the movement of the protection plate, causing the protection plate to slide into the machine body. Then, place the test sample into the carrier under the detector. Next, move the protection plate upward to both sides of the carrier under the detector, making the carrier in a relatively sealed environment for detection. After the rapeseed oil sample in the carrier under the detector is detected, control the two protection plates to slide downward into the machine body again. Then, start the first motor through the PLC. When the first motor starts, it drives the movement of the two moving platforms. The movement of the moving platforms drives the movement of the carrier, causing one carrier to move away from under the detector, and the other carrier carrying the sample to be detected to move into the position under the detector. Finally, repeat the above operations for continuous detection. During the detection process of the rapeseed oil sample, the protection plate protects the test sample to prevent the rapeseed oil sample from undergoing an oxidation reaction due to long-term exposure to air, thereby ensuring the accuracy of the detection results.

[0025] 2. Through the setting of the up-and-down movement of the moving plate, when the protection plate moves downward, the rotation of the second threaded rod drives the rotation of the second limiting shaft through the transmission of the first pulley group. The rotation of the second limiting shaft drives the rotation of another second limiting shaft through the transmission of the second pulley group. The rotation of the two second limiting shafts drives the upward movement of the two moving plates. The movement of the moving plates drives the movement of the protective cover, causing the protective cover to move away from above the carrier, facilitating the transfer of the sample group into the position under the detector for detection.

[0026] 3. Through the cooperation of the clamping block and the clamping groove, when manually moving the protective cover, slide the protective cover upward, and then rotate the rotating block. The rotation of the rotating block drives the rotation of the rotating shaft. The rotation of the rotating shaft drives the rotation of the gear. The rotation of the gear drives the outward movement of the two rack plates. The movement of the two rack plates drives one end of the clamping block to slide out of the protective cover and embed into the clamping groove to fix the position of the protective cover, facilitating the taking of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic cross-sectional view of the overall structure of the present invention;

[0029] Figure 3 is a schematic diagram of the structure at the carrier and the protection plate of the present invention;

[0030] Figure 4 is a schematic diagram of the structure at the protection plate of the present invention;

[0031] Figure 5 is a schematic diagram of the structure at the carrier of the present invention;

[0032] Figure 6 This is a schematic cross-sectional view of the structure at the protective cover of the present invention.

[0033] In the figure: 1, the body; 2, the detector; 3, the carrier table; 4, the test tube; 5, the moving table; 6, the first threaded rod; 7, the first limiting shaft; 8, the first motor; 9, the protective plate; 10, the second threaded rod; 11, the second motor; 12, the gasket; 13, the first pulley set; 14, the second limiting shaft; 15, the moving plate; 16, the second pulley set; 17, the third limiting shaft; 18, the protective cover; 19, the spring; 20, the rotating block; 21, the rotating shaft; 22, the gear; 23, the rack plate; 24, the clamping block; 25, the clamping groove. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] As Figures 1 to 6 shown, in the embodiment of the present invention, a device for detecting the content of trichloropropanol esters in rapeseed oil includes a body 1, a detector 2 is installed inside the body 1, and a feeding component and a protection component are arranged inside the body 1;

[0036] The feeding component includes a moving table 5 arranged inside the body 1. There are two moving tables 5. Carrier tables 3 are installed inside both of the two moving tables 5. Test tubes 4 are evenly arranged on the tops of the two carrier tables 3. A first threaded rod 6 and a first limiting shaft 7 are respectively installed inside both sides of the two moving tables 5. A first motor 8 is installed at one end of the first threaded rod 6;

[0037] The protection component includes a protective plate 9 slidably installed inside the body 1. There are two symmetrically arranged protective plates 9. Second threaded rods 10 are threadedly connected to the bottoms of the two protective plates 9. Second motors 11 are installed at the bottom ends of the two second threaded rods 10.

[0038] Existing: CN210401337U discloses a gas chromatography-mass spectrometry instrument. The body 1 and the detector 2 proposed in the present application document are disclosed in this patent. These technical means will not be elaborated one by one here;

[0039] Both of the two moving tables 5 are threadedly connected to the first threaded rod 6, and both of the two moving tables 5 are slidably connected to the first limiting shaft 7;

[0040] When it is necessary to detect the content of 3-MCPD esters in rapeseed oil, first start the second motor 11. When the second motor 11 starts, it drives the second threaded rod 10 to rotate. The rotation of the second threaded rod 10 drives the movement of the protection plate 9, so that the protection plate 9 slides into the machine body 1;

[0041] Then put the test sample into the carrier table 3 below the detector 2, and then move the protection plate 9 upward to both sides of the carrier table 3 below the detector 2, so that the carrier table 3 is in a relatively sealed environment for detection;

[0042] After the rapeseed oil sample in the carrier table 3 below the detector 2 is detected, control the two protection plates 9 to slide downward into the machine body 1 again, and then start the first motor 8 through the PLC. When the first motor 8 starts, it drives the two moving platforms 5 to move. The movement of the moving platform 5 drives the movement of the carrier table 3, so that one carrier table 3 is removed from below the detector 2, and the other carrier table 3 carrying the sample to be detected is moved into below the detector 2. Finally, repeat the above operations for continuous detection;

[0043] During the detection process of this device, the test sample is protected by the protection plate 9 to prevent the rapeseed oil sample from undergoing an oxidation reaction when exposed to air for a long time, thereby ensuring the accuracy of the detection results.

[0044] Such as Figure 3 and Figure 4 As shown, a sealing gasket 12 is installed on one side of the protection plate 9.

[0045] During the detection process, the two sealing gaskets 12 are located on both sides of the carrier table 3 and fit with it, so as to conduct sealing.

[0046] Such as Figure 2 、 Figure 3 and Figure 5 As shown, the carrier table 3 is embedded inside the moving platform 5, and the carrier table 3 is slidably connected to the moving platform 5.

[0047] Grooves are provided on both sides of the carrier table 3, which is convenient for the staff to pick up and place;

[0048] With the sliding setting of the moving platform 5, during use, the carrier table 3 can be directly taken out of the moving platform 5, which is convenient for taking or placing the test tube 4, and helps to improve the convenience during operation.

[0049] Such as Figure 1 and Figure 2 As shown, protective covers 18 are provided on both sides inside the machine body 1, and the protective covers 18 are arranged above the carrier table 3.

[0050] During the waiting process of the sample to be detected on the top of another set of carrier platforms 3, the protective cover 18 can be placed on the top of this carrier platform 3 to cover the test tube 4, which can not only reduce the contact between the sample and oxygen, delay the oxidation reaction, but also prevent contamination by dust, microorganisms, etc., ensure the stability of the sample before detection, and improve the reliability of the detection result.

[0051] As Figure 2 , Figure 3 and Figure 4 shown, moving plates 15 are provided at the bottoms of both sides of the protective cover 18, and second limiting shafts 14 and third limiting shafts 17 are embedded in the inner walls of the two moving plates 15. The two second limiting shafts 14 are driven by a second pulley group 16. A first pulley group 13 is installed on the outer wall of one of the second limiting shafts 14, and one end of the first pulley group 13 away from the second limiting shaft 14 is installed on the outer wall of the second threaded rod 10.

[0052] When the protective plate 9 moves downward, the rotation of the second threaded rod 10 drives the second limiting shaft 14 to rotate through the first pulley group 13. The rotation of the second limiting shaft 14 drives the other second limiting shaft 14 to rotate through the second pulley group 16. The rotation of the two second limiting shafts 14 drives the two moving plates 15 to move upward, and the movement of the moving plates 15 drives the movement of the protective cover 18, so that the protective cover 18 is moved away from above the carrier platform 3, facilitating the transfer of this group of samples under the detector 2 for detection.

[0053] As Figure 2 , Figure 3 and Figure 4 shown, the moving plate 15 is slidably connected to the protective cover 18.

[0054] Before detection, the protective cover 18 can be manually moved by hand to move the protective cover 18 away from above the carrier platform 3 to take the sample on the carrier platform 3.

[0055] As Figure 2 , Figure 3 and Figure 4 shown, the protective cover 18 is slidably connected to both the second limiting shaft 14 and the third limiting shaft 17.

[0056] As Figure 2 shown, springs 19 are provided on the top of the protective cover 18, and two springs 19 are symmetrically arranged.

[0057] When the protective plate 9 moves upward to drive the moving plate 15 to move downward, the elastic force of the spring 19 assists the protective cover 18 to move downward to cover the carrier platform 3 for protection.

[0058] As Figure 6As shown in the figure, a rotating shaft 21 is rotatably connected to one side of the inner wall of the protective cover 18. Rotating blocks 20 and gears 22 are fixedly installed at both ends of the rotating shaft 21. Rack plates 23 are engaged with both sides of the gear 22. Clamping blocks 24 are fixedly installed at one ends of the two rack plates 23. Card slots 25 are arranged at one ends of the clamping blocks 24, and the card slots 25 are opened on the inner wall of the machine body 1.

[0059] When manually moving the protective cover 18, slide the protective cover 18 upward, and then rotate the rotating block 20. The rotation of the rotating block 20 drives the rotation of the rotating shaft 21. The rotation of the rotating shaft 21 drives the rotation of the gear 22. The rotation of the gear 22 drives the two rack plates 23 to move outward. The movement of the two rack plates 23 drives one end of the clamping block 24 to slide out of the protective cover 18 and be embedded in the card slot 25 to fix the position of the protective cover 18, facilitating the taking of samples.

[0060] A method for detecting the content of trichloropropanol esters in rapeseed oil by a device, comprising the following steps:

[0061] S1: When it is necessary to detect the content of trichloropropanol esters in rapeseed oil, first slide the protective cover 18 upward, and then rotate the rotating block 20. The rotation of the rotating block 20 drives the rotation of the rotating shaft 21. The rotation of the rotating shaft 21 drives the rotation of the gear 22. The rotation of the gear 22 drives the two rack plates 23 to move outward. The movement of the two rack plates 23 drives one end of the clamping block 24 to slide out of the protective cover 18 and be embedded in the card slot 25 to fix the position of the protective cover 18, and then place the sample. After placing, move the protective cover 18 to the top of the carrier table 3.

[0062] S2: Then start the second motor 11. When the second motor 11 starts, it drives the second threaded rod 10 to rotate. The rotation of the second threaded rod 10 drives the movement of the protective plate 9, so that the protective plate 9 slides into the machine body 1.

[0063] S3: Then place the test sample into the carrier table 3 below the detector 2, and then move the protective plate 9 upward to both sides of the carrier table 3 below the detector 2, so that the carrier table 3 is in a relatively sealed environment for detection.

[0064] S4: After the rapeseed oil sample in the carrier table 3 below the detector 2 is detected, control the two protective plates 9 to slide downward into the machine body 1 again. At the same time, the rotation of the second threaded rod 10 drives the second limiting shaft 14 to rotate through the first pulley group 13. The rotation of the second limiting shaft 14 drives the other second limiting shaft 14 to rotate through the second pulley group 16. The rotation of the two second limiting shafts 14 drives the two moving plates 15 to move upward. The movement of the moving plates 15 drives the movement of the protective cover 18, so that the protective cover 18 is moved away from above the carrier table 3.

[0065] S5: Then, start the first motor 8 through PLC control. When the first motor 8 starts, it drives the two mobile platforms 5 to move. The movement of the mobile platforms 5 drives the movement of the carrier platform 3, so that one carrier platform 3 is moved away from below the detector 2, and the other carrier platform 3 carrying the sample to be detected is moved into the position below the detector 2. Finally, repeat the above operations for continuous detection.

[0066] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the content of trichloropropane ester in rapeseed oil, comprising a body (1), characterized in that: A detector (2) is installed inside the machine body (1), and a feeding component and a protection component are arranged inside the machine body (1); The loading assembly comprises a moving platform (5) arranged inside the machine body (1), wherein two moving platforms (5) are provided, and a bearing platform (3) is installed inside each of the two moving platforms (5), and test tubes (4) are evenly arranged on the tops of the two bearing platforms (3), and first threaded rods (6) and first limiting shafts (7) are installed inside the two sides of the two moving platforms (5), respectively, and a first motor (8) is installed at one end of the first threaded rod (6); The protection component comprises a protection plate (9) slidably mounted inside the machine body (1), wherein two protection plates (9) are symmetrically arranged, the bottoms of the two protection plates (9) are both threadedly connected with a second threaded rod (10), and the bottom ends of the two second threaded rods (10) are both mounted with a second motor (11).

2. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 1, characterized in that: A sealing gasket (12) is installed on one side of the protective plate (9).

3. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 1, characterized in that: The bearing platform (3) is embedded in the interior of the moving platform (5), and the bearing platform (3) and the moving platform (5) are slidably connected.

4. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 1, characterized in that: Protective covers (18) are provided on both sides of the interior of the machine body (1), and the protective covers (18) are arranged above the supporting platform (3).

5. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 4, characterized in that: A movable plate (15) is provided at the bottom of both sides of the protective cover (18), and the inner walls of the two movable plates (15) are embedded with a second limiting shaft (14) and a third limiting shaft (17). The two second limiting shafts (14) are driven by a second pulley group (16), and the outer wall of one of the second limiting shafts (14) is installed with a first pulley group (13), and the end of the first pulley group (13) away from the second limiting shaft (14) is installed on the outer wall of the second threaded rod (10).

6. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 5, characterized in that: The movable plate (15) is slidably connected to the protective cover (18).

7. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 4, characterized in that: The protective cover (18) is slidably connected to the second limiting shaft (14) and the third limiting shaft (17).

8. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 4, characterized in that: A spring (19) is arranged on the top of the protective cover (18), and two springs (19) are symmetrically arranged.

9. The device for detecting the content of trichloropropane ester in rapeseed oil according to claim 4, characterized in that: A rotating shaft (21) is rotatably connected to one side of the inner wall of the protective cover (18); a rotating block (20) and a gear (22) are respectively fixedly mounted on both ends of the rotating shaft (21); rack plates (23) are meshedly connected to both sides of the gear (22); a clamping block (24) is fixedly mounted on one end of each of the two rack plates (23); a clamping groove (25) is provided on one end of each of the clamping blocks (24); and the clamping groove (25) is formed on the inner wall of the machine body (1).

10. A method for detecting the content of trichloropropane ester in rapeseed oil, which is applicable to the device for detecting the content of trichloropropane ester in rapeseed oil according to claims 1 to 9, characterized in that: The following steps are involved: S1: When the trichloropropane ester content in rapeseed oil needs to be detected, the protective cover (18) is first slid upward, and then the rotating block (20) is rotated. The rotation of the rotating block (20) drives the rotation of the rotating shaft (21), and the rotation of the rotating shaft (21) drives the rotation of the gear (22). The rotation of the gear (22) drives the two rack plates (23) to move outward. The movement of the two rack plates (23) drives one end of the clamping block (24) to slide out from the inside of the protective cover (18) and embed into the clamping groove (25), and the position of the protective cover (18) is fixed. Then, the sample is placed, and after placement, the protective cover (18) is moved to the top of the supporting platform (3); S2: Then the second motor (11) is started. When the second motor (11) is started, it drives the second threaded rod (10) to rotate. The rotation of the second threaded rod (10) drives the protective plate (9) to move, so that the protective plate (9) slides into the machine body (1); S3: Then, the test sample is placed in the support platform (3) below the detector (2), and then moved upward to the two sides of the support platform (3) below the detector (2) through the protective plate (9), so that the support platform (3) is in a relatively sealed environment for testing; S4: After the rapeseed oil sample in the support platform (3) below the detector (2) is detected, the two protection plates (9) are controlled to slide downward into the machine body (1) again. At the same time, the rotation of the second threaded rod (10) drives the second limiting shaft (14) to rotate through the first belt pulley group (13). The rotation of the second limiting shaft (14) drives another second limiting shaft (14) to rotate through the second belt pulley group (16). The rotation of the two second limiting shafts (14) drives the two movable plates (15) to move upward. The movement of the movable plates (15) drives the movement of the protection cover (18), so that the protection cover (18) is removed from above the support platform (3); S5: The first motor (8) is then started by controlling the PLC. When the first motor (8) is started, it drives the two mobile platforms (5) to move. The movement of the mobile platforms (5) drives the movement of the carrier platforms (3), so that one carrier platform (3) is moved away from under the detector (2), and the other carrier platform (3) carrying the sample to be detected is moved under the detector (2). Finally, the above operation is repeated to perform continuous detection.

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