A device and method for optically detecting foodborne pathogens

Abstract

The invention relates to the technical field of foodborne pathogen detection, and specifically to a device based on optical detection of foodborne pathogens, comprising a conveyor belt, a bracket being provided on the upper middle side of the conveyor belt, and a near-infrared hyperspectral system detection head being provided in the middle of the lower end of the bracket; in the invention, as the lifting frame continues to rise, the gear shaft will rise to the end of the teeth on the rack, at which time the gear shaft will no longer mesh with the rack, a torsion spring 1 will drive the gear shaft, a square telescopic rod, an arc-shaped magnetic connecting plate, a clamping plate and a fruit and vegetable food sample to reset, the clamping plate will be squeezed by a top frame, the clamping plate will slide downward on the arc-shaped magnetic connecting plate, and the clamping plate on the other side will slide upward and tilt, at which time a first horizontal plate and a second horizontal plate on both sides will squeeze a second spring, and the fruit and vegetable food sample will rotate counterclockwise under the action of the clamping plates on both sides, so as to facilitate multi-angle rotation detection of the fruit and vegetable food sample, thereby improving the detection quality and efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of foodborne pathogenic bacteria detection, and in particular to a device and method for optically detecting foodborne pathogenic bacteria. Background Art

[0002] The indicators of food inspection mainly include general component analysis, trace element analysis, pesticide residue analysis, veterinary drug residue analysis, mycotoxin analysis, food additive analysis and analysis of other harmful substances. According to the characteristics of the inspected items, the inspection of each indicator corresponds to the corresponding inspection method. In addition to the traditional conventional analysis methods, instrumental analysis methods have gradually become the main means of food hygiene inspection, including spectrophotometry, atomic fluorescence spectroscopy, electrochemical method, atomic absorption spectroscopy, gas chromatography, high performance liquid chromatography, etc. The above inspection methods can be roughly divided into inorganic component analysis methods and organic component analysis methods according to the inspection items.

[0003] After searching, the patent with announcement number 201310309189.8 discloses "a foodborne pathogen detection system and method based on hyperspectral", including a surface detection line, a sorting line, a point detection line, a control system, a support frame and several sample boxes; the surface detection line, the sorting line and the point detection line are respectively connected to the control system and installed on the support frame in sequence.

[0004] However, when the above patent is in use, the near-infrared hyperspectral system 1-1 is installed above the central area of ​​the surface detection transmission belt 1-3 through the surface detection line gantry 1-4, which is used to perform a hyperspectral surface scan on the sample loaded in the sample box 4 and transmit the result to the control system 6; this method can only perform a hyperspectral surface scan on one angle of the sample, which is not conducive to the detection quality of the sample, and manual operation is required if the sample is to be turned over, and the detection efficiency is also poor. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that in the prior art, only one angle of the sample can be scanned by high-spectral surface, which is not conducive to the detection quality of the sample, and if the sample is to be turned over, manual operation is required, and the detection efficiency is also poor. A device and method based on optical detection of foodborne pathogens are proposed to solve the problem that in the prior art, only one angle of the sample can be scanned by high-spectral surface, which is not conducive to the detection quality of the sample, and if the sample is to be turned over, manual operation is required, and the detection efficiency is also poor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for optically detecting foodborne pathogens comprises a conveyor belt, a bracket is provided on the upper middle part of the conveyor belt, and a near-infrared hyperspectral system detection head is provided in the middle part of the lower end of the bracket;

[0008] A multi-angle detection mechanism for performing multi-angle infrared light detection on food is also provided, the multi-angle detection mechanism includes two clamping plates arranged in the middle of the upper end of the conveyor belt and arranged symmetrically on the left and right, a gap is provided between the lower end of the clamping plate and the conveyor belt, an arc-shaped magnetic connecting plate is slidably installed at one end of the clamping plate away from each other, a square telescopic rod is fixedly installed at the middle of the end of the arc-shaped magnetic connecting plate away from each other, a gear shaft is fixedly installed at the end of the square telescopic rod away from each other, a lifting frame is rotatably installed on the two gear shafts, a hydraulic cylinder is fixedly installed at the middle of the upper end of the lifting frame, the middle of the hydraulic cylinder is fixedly connected to the bracket, a spring one is sleeved on the outer side of the square telescopic rod, and the two ends of the spring one are respectively fixedly connected to the gear shaft and the arc-shaped magnetic connecting plate;

[0009] A cleaning mechanism is also provided for cleaning dust and impurities on the surface of the near-infrared hyperspectral system detection head. The cleaning mechanism includes a magnetic receiving box arranged at the lower right side of the near-infrared hyperspectral system detection head. A rotating rod is rotatably installed in the middle of the bottom end of the magnetic receiving box. A winding roller is fixedly installed on the upper end of the rotating rod. A cleaning block is fixedly installed on the upper end of the winding roller. A torsion spring three is sleeved on the outer side of the rotating rod.

[0010] Preferably, a magnetic frame is provided at one end of the arc-shaped magnetic connecting plate that is away from each other, the upper end of the magnetic frame is fixedly connected to the bracket, and the arc-shaped magnetic connecting plate and the magnetic frame are magnetically adsorbed to each other.

[0011] Preferably, a torsion spring is sleeved on the outer side of the gear shaft, and a matching rack is provided on the upper side of the gear shaft, and the upper end of the rack is fixedly mounted on the bracket.

[0012] Preferably, a horizontal plate 1 is fixedly installed in the middle of the front end of the splint, a horizontal plate 2 is fixedly installed at the ends of the arc-shaped magnetic connecting plates that are close to each other and are offset up and down, a spring 2 is fixedly installed between the horizontal plate 1 and the horizontal plate 2, and a top frame is fixedly installed on the middle of the right end of the rack corresponding to the left splint.

[0013] Preferably, a pressing block is slidably installed on the middle part of the end of the clamping plates that are close to each other, and a spring three is symmetrically fixedly installed on the end of the pressing blocks that are away from each other, and the other end of the spring three is fixedly connected to the inside of the clamping plate.

[0014] Preferably, the ends of the clamping plates that are close to each other are symmetrically inserted with clamping strips up and down and front and back, and the ends of the pressing blocks that are away from each other are fixedly installed with active airbags. The active airbags are connected to passive airbags, and the two ends of the passive airbags are respectively fixedly connected to the clamping strips and the inside of the clamping plates.

[0015] Preferably, the upper ends of the arc-shaped magnetic connecting plates are fixedly installed with push plates, and the sides of the push plates close to each other are provided with inclined blocks, and the upper ends of the inclined blocks are fixedly installed with guide rods, and the upper ends of the guide rods are slidably penetrated by connecting frames, and the lower ends of the connecting frames are fixedly connected to the lifting frame, and springs four are sleeved on the outer sides of the guide rods, and the upper and lower ends of the springs four are respectively fixedly connected to the connecting frame and the inclined blocks.

[0016] Preferably, the gear shafts are fixedly mounted with a cam wheel at one end away from each other, a cam rod is provided on the upper side of the cam wheel, a connecting shaft is rotatably mounted on the front side of the cam rod, the right end of the connecting shaft is fixedly mounted on the rack, and two torsion springs are sleeved on the outer side of the connecting shaft.

[0017] Preferably, a steel wire rope is wound on the outer side of the winding roller, and the two ends of the steel wire rope are respectively fixedly connected to the winding roller and the bracket, a guide rod 2 is fixedly installed on the front end of the magnetic receiving box, the right end of the guide rod 2 is slidably installed on the bracket, a limit plate is provided at the right end of the bracket corresponding to the guide rod 2, and a magnetic plate is fixedly installed on the upper end of the lifting frame corresponding to the magnetic receiving box.

[0018] A method based on an optical device for detecting foodborne pathogens, the specific steps are as follows:

[0019] Step 1: Clean the dust and impurities on the lower surface of the near-infrared hyperspectral system detection head through a cleaning mechanism;

[0020] Step 2: The fruit and vegetable food samples are clamped and lifted by the multi-angle detection mechanism, and the samples are automatically flipped and rotated to perform multi-angle detection on the fruit and vegetable food samples;

[0021] Step 3: The push plate and the inclined block are provided to buffer the arc-shaped magnetic connecting plates when they move toward each other;

[0022] Step 4: The active airbag is squeezed by the pressing block, so that the gas in the active airbag enters the passive airbag, which in turn pushes the upper and lower, front and back clamping strips to extend from the inside of the clamping plate, and stably abuts and clamps the two ends of the fruit food sample;

[0023] Step 5. The bump on the bump wheel is blocked by the bump at the lower end of the bump rod. When the two bumps collide, the bump rod is driven to rotate on the connecting shaft, compressing the torsion spring 2, thereby slowing down the rotation speed of the gear shaft when the torsion spring 1 is reset.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the present invention, the hydraulic cylinder is started to drive the lifting frame to rise, and the lifting frame drives the gear shafts and torsion spring 1 on both sides to rise (torsion spring 1 can prevent the gear shaft from self-rotation during the rising process), and the gear shaft drives the square telescopic rods, arc-shaped magnetic connecting plates and clamping plates on both sides to rise synchronously. When the arc-shaped magnetic connecting plates rise, they will separate from the magnetic frame, and then under the action of spring 1, the arc-shaped magnetic connecting plates on both sides will be pushed to move closer to each other, and the square telescopic rods will automatically extend, and the arc-shaped magnetic connecting plates will also drive the clamping plates on both sides to move closer to each other, so as to clamp the two ends of the fruit and food sample. As the lifting frame continues to rise, the gear shafts on both sides will mesh with the racks, thereby driving the gear shafts to rotate on the lifting frame and compressing the torsion spring. Since the fruit and food samples have been clamped by the clamps on both sides and risen synchronously, the fruit and food samples at this time are a whole with the clamps on both sides, the arc-shaped magnetic connecting plates, the square telescopic rods and the gear shafts. When the gear shafts rotate, the fruit and food samples will also be driven to rotate synchronously, which is convenient for automatically turning over different sides of the fruit and food samples, and is beneficial for infrared light detection of different sides of the fruit and food samples, thereby improving detection efficiency and quality.

[0026] 2. In the present invention, as the lifting frame continues to rise, the gear shaft will rise to the end of the teeth on the rack. At this time, the gear shaft is no longer meshed with the rack, and the torsion spring 1 will drive the gear shaft, the square telescopic rod, the arc-shaped magnetic connecting plate, the splint and the fruit and food sample to reset. The splint is squeezed by the top frame, which will cause the splint to slide downward on the arc-shaped magnetic connecting plate, and the splint on the other side will slide upward and tilt. At this time, the horizontal plates 1 and 2 on both sides will squeeze the spring 2, and the fruit and food sample will rotate counterclockwise under the action of the splints on both sides, which is convenient for multi-angle rotation detection of the fruit and food samples, thereby improving the detection quality and efficiency.

[0027] 3. In the present invention, when the arc-shaped magnetic connecting plates on both sides approach each other, the push plates on both sides will also be driven to approach each other, and the push plates will contact the inclined blocks and push the inclined blocks and the guide rod 1 to move upward on the connecting frame, compressing the spring 4 until the push plates pass over the inclined blocks. The inclined blocks will then be reset under the action of the spring 4. The set push plates and inclined blocks can facilitate the buffering effect when the arc-shaped magnetic connecting plates move closer to each other, avoiding the situation that when the spring 1 releases the stored force, the arc-shaped magnetic connecting plates on both sides move too fast, resulting in excessive squeezing force on the fruit and food samples, causing damage to the fruit and food samples, thereby ensuring the subsequent inspection quality.

[0028] 4. In the present invention, when the clamps on both sides clamp the fruit and food samples, the pressing block will first contact the two ends of the fruit and food samples, and the pressing block will be squeezed by the two ends of the fruit and food samples, and then slide into the inside of the clamp, compressing the spring three, and the pressing block will also squeeze the active airbag, so that the gas in the active airbag enters the passive airbag, and then push the upper and lower, front and back clamping strips to extend from the inside of the clamp, abutting and clamping the two ends of the fruit and food samples, ensuring that the fruit and food samples will not fall during the flipping movement, ensuring the normal operation of the detection work, and ensuring the detection quality and efficiency.

[0029] 5. In the present invention, when the gear shaft rises to the end of the teeth on the upper end of the rack, the gear shaft rotates and resets under the action of torsion spring 1, which will also drive the lug wheel to rotate and reset. The lug on the lug wheel will collide with the lug rod, and the lug at the lower end of the lug rod will block the lug on the lug wheel. When the two lugs collide, the lug rod will rotate on the connecting shaft, compressing torsion spring 2, thereby slowing down the rotation speed of the gear shaft when torsion spring 1 is reset, thereby avoiding the gear shaft from rotating too fast when resetting, causing the clamped fruit and food samples to loosen and wear, and also playing a good protective role for the fruit and food samples, ensuring the quality of subsequent testing.

[0030] 6. In the present invention, when the lifting frame rises, it will also drive the magnetic plate to rise. When the magnetic plate rises to the right side of the magnetic receiving box, the magnetic block on the magnetic plate generates a magnetic repulsive force on the magnetic receiving box, which will push the magnetic receiving box and the guide rod 2 to move left on the bracket. The magnetic receiving box drives the rotating rod, the winding roller and the cleaning block to move synchronously. At this time, the wound wire rope will be unfolded from the winding roller, compressing the torsion spring 3, and the winding roller, the rotating rod and the cleaning block will rotate inside the magnetic receiving box. When the cleaning block follows the magnetic receiving box to move to the lower side of the near-infrared hyperspectral system detection head, the cleaning block contacts the lower surface of the near-infrared hyperspectral system detection head, and cleans the dust and impurities on the surface of the near-infrared hyperspectral system detection head to avoid the adhesion of dust and impurities on the near-infrared hyperspectral system detection head to affect the detection quality. Since the cleaning block itself is also in a rotating state, the cleaning effect is better, and the magnetic receiving box is also convenient for collecting the dust and impurities that fall off after cleaning, to avoid the dust and impurities falling onto the fruit and food samples below, which also ensures the detection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0032] Figure 2 It is a bottom-up three-dimensional structural schematic diagram of the present invention;

[0033] Figure 3 It is a left side cross-sectional structural schematic diagram of the present invention;

[0034] Figure 4 For the present invention Figure 1 An enlarged structural diagram of the middle splint;

[0035] Figure 5 For the present invention Figure 3 An enlarged structural diagram of the connection between the middle clamping plate and the lifting frame;

[0036] Figure 6 For the present invention Figure 1 An enlarged structural diagram of the connection between the middle bracket and the magnetic receiving box;

[0037] Figure 7 For the present invention Figure 6 An enlarged structural diagram of the connection between the middle magnetic receiving box and the cleaning block;

[0038] Figure 8 For the present invention Figure 4 A schematic diagram of the cross-sectional structure of the middle splint;

[0039] Fig. 9 For the present invention Figure 4 The structural diagram at A in the middle;

[0040] Fig.10 For the present invention Figure 5 The structural diagram at B in the middle;

[0041] In the figure: 1. conveyor belt; 2. bracket; 3. near-infrared hyperspectral system detection head;

[0042] Multi-angle detection mechanism: 4, clamping plate; 5, arc-shaped magnetic connecting plate; 6, square telescopic rod; 61, gear shaft; 7, lifting frame; 8, hydraulic cylinder; 9, spring one; 10, magnetic frame; 11, torsion spring one; 12, rack; 13, horizontal plate one; 14, horizontal plate two; 15, spring two; 16, top frame; 17, pressing block; 18, spring three; 19, clamping strip; 20, active airbag; 21, passive airbag; 22, push plate; 23, inclined block; 24, guide rod one; 25, spring four; 26, connecting frame; 27, convex wheel; 28, convex rod; 29, connecting shaft; 30, torsion spring two;

[0043] Cleaning mechanism: 31. Magnetic receiving box; 32. Rotating rod; 33. Winding roller; 34. Cleaning block; 35. Torsion spring three; 36. Wire rope; 37. Guide rod two; 38. Limiting plate; 39. Magnetic plate. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] Reference Figure 1-Figure 10A device based on optical detection of foodborne pathogens comprises a conveyor belt 1, a bracket 2 is provided on the upper middle side of the conveyor belt 1, and a near-infrared hyperspectral system detection head 3 is provided in the middle of the lower end of the bracket 2; a multi-angle detection mechanism for performing multi-angle infrared light detection on food is also provided, and the multi-angle detection mechanism comprises two clamping plates 4 which are arranged in the middle of the upper end of the conveyor belt 1 and are arranged symmetrically on the left and right, and there is a gap between the lower end of the clamping plate 4 and the conveyor belt 1, and an arc-shaped magnetic connecting plate 5 is slidably installed at one end of the clamping plate 4 which is away from each other, and a square telescopic rod 6 is fixedly installed in the middle of the one end of the arc-shaped magnetic connecting plate 5 which is away from each other, and a gear shaft 61 is fixedly installed at the one end of the square telescopic rod 6 which is away from each other, and a lifting device is rotatably installed on the two gear shafts 61. Frame 7, a hydraulic cylinder 8 is fixedly installed in the middle of the upper end of the lifting frame 7, and the middle of the hydraulic cylinder 8 is fixedly connected to the bracket 2. A spring 9 is sleeved on the outer side of the square telescopic rod 6, and the two ends of the spring 9 are respectively fixedly connected to the gear shaft 61 and the arc-shaped magnetic connecting plate 5. The arc-shaped magnetic connecting plate 5 is fitted with a magnetic frame 10 at one end away from each other, and the upper end of the magnetic frame 10 is fixedly connected to the bracket 2, and the arc-shaped magnetic connecting plate 5 and the magnetic frame 10 are magnetically adsorbed to each other. A torsion spring 11 is sleeved on the outer side of the gear shaft 61, and a rack 12 that cooperates with each other is provided on the upper side of the gear shaft 61. The upper end of the rack 12 is fixedly installed on the bracket 2, and a cross plate 13 is fixedly installed in the middle of the front end of the splint 4. The upper and lower ends of the arc-shaped magnetic connecting plates 5 that are close to each other are fixedly connected. The staggered parts are fixedly installed with a second cross plate 14, a second spring 15 is fixedly installed between the first cross plate 13 and the second cross plate 14, and a top frame 16 is fixedly installed on the middle part of the right end of the rack 12 corresponding to the left clamping plate 4, a pressing block 17 is slidably installed on the middle part of the end of the clamping plates 4 close to each other, and a spring three 18 is symmetrically fixedly installed on the end of the pressing block 17 away from each other, and the other end of the spring three 18 is fixedly connected to the inside of the clamping plate 4, and the end of the clamping plates 4 close to each other is symmetrically inserted with a clamping strip 19 up and down and front and back, and the end of the pressing block 17 away from each other is fixedly installed with an active airbag 20, and the active airbag 20 is connected with a passive airbag 21, and the two ends of the passive airbag 21 are respectively fixedly connected to the clamping strip 19 and the inside of the clamping plate 4 , the upper ends of the arc-shaped magnetic connecting plates 5 are fixedly installed with push plates 22, and the sides of the push plates 22 that are close to each other are provided with inclined blocks 23, and the upper ends of the inclined blocks 23 are fixedly installed with guide rods 24, and the upper ends of the guide rods 24 are penetrated and slidably installed with connecting frames 26, and the lower ends of the connecting frames 26 are fixedly connected to the lifting frame 7, and the outer sides of the guide rods 24 are sleeved with springs 25, and the upper and lower ends of the springs 25 are respectively fixedly connected to the connecting frames 26 and the inclined blocks 23, and the ends of the gear shafts 61 that are away from each other are fixedly installed with cam wheels 27, and the upper side of the cam wheels 27 is provided with cam rods 28, and the front side of the cam rods 28 is rotatably installed with a connecting shaft 29, and the right end of the connecting shaft 29 is fixedly installed on the rack 12, and the outer side of the connecting shaft 29 is sleeved with torsion springs 23;

[0047] During operation, the oval fruit and vegetable food samples are transported by the provided conveyor belt 1. When the fruit and vegetable food samples move to the lower side of the near-infrared hyperspectral system detection head 3, the provided near-infrared hyperspectral system detection head 3 performs infrared light detection on the fruit and vegetable food samples, and the hydraulic cylinder 8 is started to drive the lifting frame 7 to rise. The lifting frame 7 drives the gear shaft 61 and the torsion spring 11 on both sides to rise (the torsion spring 11 can prevent the gear shaft 61 from self-rotation during the rising process). The gear shaft 61 drives the square telescopic rod 6, the arc-shaped magnetic connecting plate 5 and the clamping plate 4 on both sides to rise synchronously. When the arc-shaped magnetic connecting plate 5 rises, it will separate from the magnetic frame 10, and then, under the action of the spring 9, it will push the arc-shaped magnetic connecting plates 5 on both sides to move closer to each other, as well as the square telescopic rod 6 will automatically extend, and the arc-shaped magnetic connecting plate 5 will also drive the clamping plates 4 on both sides to move closer to each other, clamping the two ends of the fruit and food sample. As the lifting frame 7 continues to rise, the gear shafts 61 on both sides will mesh with the racks 12, thereby driving the gear shafts 61 to rotate on the lifting frame 7 and compressing the torsion spring 11. Since the fruit and food sample has been clamped by the clamping plates 4 on both sides and rises synchronously, the fruit and food sample, the clamping plates 4 on both sides, the arc-shaped magnetic connecting plate 5, the square telescopic rod 6 and the gear shaft 61 are a whole at this time. When the gear shaft 61 rotates, it will also drive the fruit and food sample to rotate synchronously, which is convenient for automatically turning over different sides of the fruit and food sample, which is beneficial for infrared light detection of different sides of the fruit and food sample, thereby improving the detection efficiency. The rate and quality, as the lifting frame 7 continues to rise, the gear shaft 61 will rise to the end of the teeth on the rack 12, at this time the gear shaft 61 is no longer meshed with the rack 12, the torsion spring 11 will drive the gear shaft 61, the square telescopic rod 6, the arc-shaped magnetic connecting plate 5, the clamping plate 4 and the fruit and food sample to reset, the clamping plate 4 is squeezed by the top frame 16, the clamping plate 4 will slide down on the arc-shaped magnetic connecting plate 5, and the clamping plate 4 on the other side will slide upward and tilt, at this time the horizontal plate 13 and the horizontal plate 2 14 on both sides will squeeze the spring 2 15, the fruit and food sample will rotate counterclockwise under the action of the clamping plates 4 on both sides, which is convenient for multi-angle rotation detection of the fruit and food sample, improving the detection quality and efficiency, when the arc-shaped magnetic connecting plates 5 on both sides are close to each other, The push plates 22 on both sides will also be driven to approach each other, the push plates 22 will contact the inclined blocks 23, and push the inclined blocks 23 and the guide rods 1 24 to move upward on the connecting frame 26, compressing the springs 4 25. Until the push plates 22 pass over the inclined blocks 23, the inclined blocks 23 will be reset under the action of the springs 4 25. The push plates 22 and inclined blocks 23 are arranged to facilitate the arc-shaped magnetic connecting plates 5 to move closer to each other, and play a buffering role, avoiding the arc-shaped magnetic connecting plates 5 on both sides from moving too fast when the springs 1 9 release the stored force, resulting in excessive squeezing force on the fruit and food samples, causing damage to the fruit and food samples, thereby ensuring the subsequent inspection quality. When the clamping plates 4 on both sides clamp the fruit and food samples, the pressing blocks 17 will first contact the two ends of the fruit and food samples,The pressing block 17 will be squeezed by the two ends of the fruit and food sample, and then slide into the clamping plate 4 to compress the spring three 18. The pressing block 17 will also squeeze the active airbag 20, so that the gas in the active airbag 20 enters the passive airbag 21, and then push the upper and lower, front and back clamping strips 19 to extend from the inside of the clamping plate 4 to abut and clamp the two ends of the fruit and food sample, ensuring that the fruit and food sample will not fall during the flipping movement, ensuring the normal operation of the detection work, and ensuring the detection quality and efficiency. When the gear shaft 61 rises to the end of the upper teeth of the rack 12, the gear shaft 61 is in the torsion spring one. When the cam wheel 27 rotates and resets under the action of 11, the cam wheel 27 will also be driven to rotate and reset. The cam on the cam wheel 27 will collide with the cam rod 28, and the cam at the lower end of the cam rod 28 will block the cam on the cam wheel 27. When the two cams collide, the cam rod 28 will be driven to rotate on the connecting shaft 29, compressing the torsion spring 2 30, thereby slowing down the rotation speed of the gear shaft 61 when the torsion spring 11 is reset, thereby avoiding the situation where the gear shaft 61 rotates too fast when resetting, causing the clamped fruit and vegetable food samples to loosen and wear, and also playing a good protective role for the fruit and vegetable food samples, ensuring the quality of subsequent detection.

[0048] As an embodiment of the present invention, a cleaning mechanism for cleaning dust and impurities on the surface of the near-infrared hyperspectral system detection head 3 is also provided, the cleaning mechanism comprising a magnetic receiving box 31 arranged at the lower right side of the near-infrared hyperspectral system detection head 3, a rotating rod 32 is rotatably installed in the middle of the bottom end of the magnetic receiving box 31, a winding roller 33 is fixedly installed on the upper end of the rotating rod 32, a cleaning block 34 is fixedly installed on the upper end of the winding roller 33, a torsion spring 35 is sleeved on the outer side of the rotating rod 32, a steel wire rope 36 is wound on the outer side of the winding roller 33, and the two ends of the steel wire rope 36 are respectively fixedly connected to the winding roller 33 and the bracket 2, a guide rod 2 37 is fixedly installed on the front end of the magnetic receiving box 31, the right end of the guide rod 2 37 is slidably installed on the bracket 2, a limit plate 38 is provided at the right end of the bracket 2 corresponding to the guide rod 2 37, and a magnetic plate 39 is fixedly installed on the upper end of the lifting frame 7 corresponding to the magnetic receiving box 31;

[0049] During operation, when the lifting frame 7 rises, it will also drive the magnetic plate 39 to rise. When the magnetic plate 39 rises to the right side of the magnetic receiving box 31, the magnetic block on the magnetic plate 39 generates a magnetic repulsive force on the magnetic receiving box 31, which will push the magnetic receiving box 31 and the guide rod 2 37 to move left on the bracket 2. The magnetic receiving box 31 drives the rotating rod 32, the winding roller 33 and the cleaning block 34 to move synchronously. At this time, the wound wire rope 36 will be unfolded from the winding roller 33, compressing the torsion spring 35. The winding roller 33, the rotating rod 32 and the cleaning block 34 will rotate inside the magnetic receiving box 31. When the cleaning block 34 follows the magnetic receiving box 31 to move to the lower side of the near-infrared hyperspectral system detection head 3, the cleaning block 34 contacts the lower surface of the near-infrared hyperspectral system detection head 3, The dust and impurities on the surface of the system detection head 3 are cleaned to prevent the adhesion of dust and impurities on the near-infrared hyperspectral system detection head 3 and affect the detection quality. Since the cleaning block 34 itself is also in a rotating state, the cleaning effect is better, and the magnetic receiving box 31 is also convenient for collecting the dust and impurities that fall after cleaning, preventing the dust and impurities from falling onto the fruit and food samples below, and also ensuring the detection quality. When the upper end of the magnetic plate 39 moves away from the right side of the magnetic receiving box 31, it will drive the rotating rod 32, the winding roller 33 and the cleaning block 34 to rotate under the action of the torsion spring three 35, and rewind the wire rope 36, which will cause the magnetic receiving box 31 and the guide rod two 37 to move to the right and reset. The set limit plate 38 limits the guide rod two 37 and the magnetic receiving box 31 when they are reset.

[0050] A method based on an optical device for detecting foodborne pathogens, the specific steps are as follows:

[0051] Step 1: Clean the dust and impurities on the lower surface of the near-infrared hyperspectral system detection head 3 through a cleaning mechanism;

[0052] Step 2: The fruit and vegetable food samples are clamped and lifted by the multi-angle detection mechanism, and the samples are automatically flipped and rotated to perform multi-angle detection on the fruit and vegetable food samples;

[0053] Step 3: The push plate 22 and the inclined block 23 provide a buffering effect when the arc-shaped magnetic connecting plates 5 move toward each other;

[0054] Step 4: The active airbag 20 is squeezed by the pressing block 17, so that the gas in the active airbag 20 enters the passive airbag 21, which in turn pushes the upper and lower, front and back clamping strips 19 to extend from the inside of the clamping plate 4, and stably abuts and clamps the two ends of the fruit food sample;

[0055] Step 5: The bump on the bump wheel 27 is blocked by the bump at the lower end of the bump rod 28. When the two bumps collide, the bump rod 28 is driven to rotate on the connecting shaft 29, compressing the torsion spring 2 30, thereby slowing down the rotation speed of the gear shaft 61 when the torsion spring 11 is reset.

[0056] Working principle:

[0057] When the present invention is used, the oval fruit and vegetable food samples are transported by the provided conveyor belt 1. When the fruit and vegetable food samples move to the lower side of the near-infrared hyperspectral system detection head 3, the provided near-infrared hyperspectral system detection head 3 performs infrared light detection on the fruit and vegetable food samples, and the hydraulic cylinder 8 is started to drive the lifting frame 7 to rise. The lifting frame 7 drives the gear shaft 61 and the torsion spring 11 on both sides to rise (the torsion spring 11 can prevent the gear shaft 61 from self-rotation during the rising process). The gear shaft 61 drives the square telescopic rod 6, the arc-shaped magnetic connecting plate 5 and the clamping plate 4 on both sides to rise synchronously. When the arc-shaped magnetic connecting plate 5 rises, it will separate from the magnetic frame 10, and then, under the action of the spring 9, it will push the arc-shaped magnetic connecting plates 5 on both sides to move closer to each other, and the square telescopic rod 6, the arc-shaped magnetic connecting plate 5 and the clamping plate 4 will move closer to each other. The retractable rod 6 will automatically extend, and the arc-shaped magnetic connecting plate 5 will also drive the clamping plates 4 on both sides to move closer to each other, clamping the two ends of the fruit and food sample. As the lifting frame 7 continues to rise, the gear shafts 61 on both sides will mesh with the racks 12, thereby driving the gear shaft 61 to rotate on the lifting frame 7 and compressing the torsion spring 11. Since the fruit and food sample has been clamped by the clamping plates 4 on both sides and rises synchronously, the fruit and food sample, the clamping plates 4 on both sides, the arc-shaped magnetic connecting plate 5, the square telescopic rod 6 and the gear shaft 61 are a whole at this time. When the gear shaft 61 rotates, it will also drive the fruit and food sample to rotate synchronously, which is convenient for automatically turning over different sides of the fruit and food sample, which is beneficial to infrared light detection of different sides of the fruit and food sample, thereby improving the detection In order to improve the measurement efficiency and quality, as the lifting frame 7 continues to rise, the gear shaft 61 will rise to the end of the teeth on the rack 12. At this time, the gear shaft 61 is no longer meshed with the rack 12, and the torsion spring 11 will drive the gear shaft 61, the square telescopic rod 6, the arc-shaped magnetic connecting plate 5, the clamping plate 4 and the fruit and food sample to reset. The clamping plate 4 is squeezed by the top frame 16, which will make the clamping plate 4 slide downward on the arc-shaped magnetic connecting plate 5, and the clamping plate 4 on the other side will slide upward and tilt. At this time, the horizontal plate 13 and the horizontal plate 2 14 on both sides will squeeze the spring 2 15, and the fruit and food sample will rotate counterclockwise under the action of the clamping plates 4 on both sides, which is convenient for multi-angle rotation detection of the fruit and food samples, thereby improving the detection quality and efficiency. When the arc-shaped magnetic connecting plates 5 on both sides are close to each other, , it will also drive the push plates 22 on both sides to approach each other, the push plates 22 contact the inclined blocks 23, and push the inclined blocks 23 and the guide rods 1 24 to move upward on the connecting frame 26, compressing the springs 4 25. Until the push plates 22 pass over the inclined blocks 23, the inclined blocks 23 will be reset under the action of the springs 4 25. The push plates 22 and inclined blocks 23 are arranged to facilitate the arc-shaped magnetic connecting plates 5 to move closer to each other, and play a buffering role, avoiding the arc-shaped magnetic connecting plates 5 on both sides from moving too fast when the springs 1 9 release the stored force, resulting in excessive squeezing force on the fruit and food samples, resulting in damage to the fruit and food samples, thereby ensuring the subsequent inspection quality. When the clamping plates 4 on both sides clamp the fruit and food samples, the pressing blocks 17 will first contact the two ends of the fruit and food samples,The pressing block 17 will be squeezed by the two ends of the fruit and food sample, and then slide into the inside of the clamping plate 4, compressing the spring three 18, and the pressing block 17 will also squeeze the active airbag 20, so that the gas in the active airbag 20 enters the passive airbag 21, and then push the upper and lower, front and back clamping strips 19 to extend from the inside of the clamping plate 4, abut and clamp the two ends of the fruit and food sample, ensuring that the fruit and food sample will not fall during the flipping movement, ensuring the normal operation of the detection work, and ensuring the detection quality and efficiency. When the gear shaft 61 rises to the end of the upper teeth of the rack 12, the gear shaft 61 rotates and resets under the action of the torsion spring one 11, which will also drive the cam wheel 27 to rotate. When the two protrusions collide, the protrusions on the protrusion wheel 27 will collide with the protrusion rod 28, and the protrusions at the lower ends of the protrusion rods 28 will block the protrusions on the protrusion wheel 27. When the two protrusions collide, the protrusion rods 28 will be driven to rotate on the connecting shaft 29, compressing the torsion spring 2 30, thereby slowing down the rotation speed of the gear shaft 61 when the torsion spring 11 is reset, thereby avoiding the gear shaft 61 from rotating too fast when resetting, resulting in the loosening and wear of the clamped fruit and food samples, and also playing a good protective role for the fruit and food samples, ensuring the quality of subsequent inspections. When the lifting frame 7 rises, it will also drive the magnetic plate 39 to rise. When the magnetic plate 39 rises to the right side of the magnetic receiving box 31, the magnetic plate 39 The magnetic block generates a magnetic repulsive force on the magnetic receiving box 31, which will push the magnetic receiving box 31 and the guide rod 2 37 to move left on the bracket 2, and the magnetic receiving box 31 drives the rotating rod 32, the winding roller 33 and the cleaning block 34 to move synchronously. At this time, the wound wire rope 36 will be unfolded from the winding roller 33, compressing the torsion spring 35, and the winding roller 33, the rotating rod 32 and the cleaning block 34 will rotate inside the magnetic receiving box 31. When the cleaning block 34 follows the magnetic receiving box 31 to move to the lower side of the near-infrared hyperspectral system detection head 3, the cleaning block 34 contacts with the lower surface of the near-infrared hyperspectral system detection head 3, and cleans the dust and impurities on the surface of the near-infrared hyperspectral system detection head 3, avoiding near-infrared The dust and impurities adhering to the detection head 3 of the hyperspectral system affect the detection quality. Since the cleaning block 34 itself is also in a rotating state, the cleaning effect is better, and the magnetic receiving box 31 is also convenient for collecting the dust and impurities that fall after cleaning, avoiding the dust and impurities from falling onto the fruit and food samples below, and also ensuring the detection quality. When the upper end of the magnetic plate 39 moves away from the right side of the magnetic receiving box 31, it will drive the rotating rod 32, the winding roller 33 and the cleaning block 34 to rotate under the action of the torsion spring 35, and rewind the wire rope 36, which will cause the magnetic receiving box 31 and the guide rod 2 37 to move to the right and reset. The set limit plate 38 limits the guide rod 2 37 and the magnetic receiving box 31 when they are reset.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for optically detecting foodborne pathogens, comprising a conveyor belt (1), characterized in that: A bracket (2) is provided on the upper middle side of the conveyor belt (1), and a near-infrared hyperspectral system detection head (3) is provided on the middle lower end of the bracket (2); A multi-angle detection mechanism for performing multi-angle infrared light detection on food is also provided. The multi-angle detection mechanism comprises two clamping plates (4) which are arranged at the middle of the upper end of the conveyor belt (1) and are arranged symmetrically on both sides. A gap is provided between the lower end of the clamping plates (4) and the conveyor belt (1). An arc-shaped magnetic connecting plate (5) is slidably mounted on one end of the clamping plates (4) away from each other. A square telescopic rod (6) is fixedly mounted on the middle of the end of the arc-shaped magnetic connecting plate (5) away from each other. A gear shaft (61) is fixedly mounted on the end of the square telescopic rod (6) away from each other. A lifting frame (7) is rotatably mounted on the two gear shafts (61). A hydraulic cylinder (61) is fixedly mounted on the middle of the upper end of the lifting frame (7). 8), the middle part of the hydraulic cylinder (8) is fixedly connected to the bracket (2), a spring (9) is sleeved on the outer side of the square telescopic rod (6), the two ends of the spring (9) are respectively fixedly connected to the gear shaft (61) and the arc-shaped magnetic connecting plate (5), the ends of the arc-shaped magnetic connecting plate (5) are fitted with a magnetic frame (10), the upper end of the magnetic frame (10) is fixedly connected to the bracket (2), and the arc-shaped magnetic connecting plate (5) and the magnetic frame (10) are magnetically attracted to each other, the outer side of the gear shaft (61) is sleeved with a torsion spring (11), the upper side of the gear shaft (61) is provided with a mutually matching rack (12), and the upper end of the rack (12) is fixedly mounted on the bracket (2); A cleaning mechanism for cleaning dust and impurities on the surface of the near-infrared hyperspectral system detection head (3) is also provided, the cleaning mechanism comprising a magnetic receiving box (31) arranged at the lower right side of the near-infrared hyperspectral system detection head (3), a rotating rod (32) is rotatably mounted in the middle of the bottom end of the magnetic receiving box (31), a winding roller (33) is fixedly mounted on the upper end of the rotating rod (32), a cleaning block (34) is fixedly mounted on the upper end of the winding roller (33), and a torsion spring (35) is sleeved on the outer side of the rotating rod (32).

2. The device for optically detecting foodborne pathogens according to claim 1, characterized in that: A first horizontal plate (13) is fixedly mounted on the middle of the front end of the clamping plate (4); a second horizontal plate (14) is fixedly mounted on the ends of the arc-shaped magnetic connecting plates (5) close to each other in an up-down offset manner; a second spring (15) is fixedly mounted between the first horizontal plate (13) and the second horizontal plate (14); and a top frame (16) is fixedly mounted on the middle of the right end of the rack (12) corresponding to the clamping plate (4) on the left side.

3. The device for optically detecting foodborne pathogens according to claim 1, characterized in that: A pressing block (17) is slidably mounted on the middle of the ends of the clamping plates (4) that are close to each other, and a spring three (18) is symmetrically fixedly mounted on the ends of the clamping blocks (17) that are away from each other, and the other end of the spring three (18) is fixedly connected to the inside of the clamping plate (4).

4. The device for optically detecting foodborne pathogens according to claim 1, characterized in that: The ends of the clamping plates (4) that are close to each other are symmetrically inserted with clamping strips (19) in an upper and lower manner and in a front and rear manner, and the ends of the pressing blocks (17) that are away from each other are fixedly installed with active airbags (20). The active airbags (20) are connected to a passive airbag (21), and the two ends of the passive airbag (21) are respectively fixedly connected to the clamping strip (19) and the inside of the clamping plates (4).

5. The device for optically detecting foodborne pathogens according to claim 1, characterized in that: The upper ends of the arc-shaped magnetic connecting plates (5) are fixedly mounted with push plates (22), and the sides of the push plates (22) close to each other are provided with inclined blocks (23), and the upper ends of the inclined blocks (23) are fixedly mounted with guide rods (24), and the upper ends of the guide rods (24) are slidably mounted with connecting frames (26), and the lower ends of the connecting frames (26) are fixedly connected to the lifting frame (7), and the outer sides of the guide rods (24) are sleeved with springs (25), and the upper and lower ends of the springs (25) are respectively fixedly connected to the connecting frame (26) and the inclined blocks (23).

6. The device for optically detecting foodborne pathogens according to claim 2, characterized in that: A lug wheel (27) is fixedly mounted on one end of the gear shaft (61) that is away from each other. A lug rod (28) is provided on the upper side of the lug wheel (27). A connecting shaft (29) is rotatably mounted on the front side of the lug rod (28). The right end of the connecting shaft (29) is fixedly mounted on the rack (12), and a second torsion spring (30) is sleeved on the outer side of the connecting shaft (29).

7. The device for optically detecting foodborne pathogens according to claim 1, characterized in that: A steel wire rope (36) is wound around the outer side of the winding roller (33), and the two ends of the steel wire rope (36) are fixedly connected to the winding roller (33) and the bracket (2) respectively. A guide rod 2 (37) is fixedly installed on the front end of the magnetic receiving box (31), and the right end of the guide rod 2 (37) is slidably installed on the bracket (2). A limit plate (38) is provided at the right end of the bracket (2) to abut against and fit the guide rod 2 (37), and a magnetic plate (39) is fixedly installed on the upper end of the lifting frame (7) to correspond to the magnetic receiving box (31).

8. The method according to claim 6, characterized in that: The specific steps are as follows: Step 1: Cleaning the dust and impurities on the lower surface of the near-infrared hyperspectral system detection head (3) by means of a cleaning mechanism; Step 2: The fruit and vegetable food samples are clamped and lifted by the multi-angle detection mechanism, and the samples are automatically flipped and rotated to perform multi-angle detection on the fruit and vegetable food samples; Step 3: The push plate (22) and the inclined block (23) are provided to provide a buffer when the arc-shaped magnetic connecting plates (5) move toward each other; Step 4: The active airbag (20) is squeezed by the pressing block (17) so that the gas in the active airbag (20) enters the passive airbag (21), thereby pushing the upper and lower, front and back clamping strips (19) to extend from the inside of the clamping plate (4) to stably abut and clamp the two ends of the fruit food sample; Step 5: The protrusion at the lower end of the protrusion rod (28) blocks the protrusion on the protrusion wheel (27). When the two protrusions collide, the protrusion rod (28) is driven to rotate on the connecting shaft (29), compressing the second torsion spring (30), thereby slowing down the rotation speed of the gear shaft (61) when the torsion spring (11) is reset.

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