Near-infrared nondestructive testing equipment for beef carcass rating

Abstract

The invention discloses near-infrared nondestructive testing equipment for beef cattle carcass rating, and belongs to the field of infrared scanning, the equipment comprises a conveying mechanism and a distance detection mechanism, and further comprises an infrared emission mechanism, the infrared emission mechanism comprises an infrared emission head arranged on the conveying mechanism and a lens vertically moving at the bottom of the infrared emission head, and the distance detection mechanism is arranged on the conveying mechanism. Beef cattle carcasses are conveyed by the conveying mechanism and move to the lower portion of the lens, the distance detection mechanism is used for detecting the distance between the beef cattle carcasses and the infrared emission head, and when the change of the distance between the beef cattle carcasses and the infrared emission head is within the zoom range of the lens, the lens vertically moves on the infrared emission head, and when the change of the distance between the beef cattle carcasses and the infrared emission head is within the zoom range of the lens, the lens vertically moves on the lens. When the distance change between the beef carcass and the infrared emission head exceeds the zoom range of the lens, the lens is reset and the infrared emission head moves vertically; the position of the lens is adjusted to change the focal length of the near-infrared light when the distance changes small, the scanning effect is ensured, and the moving frequency of the infrared emission head is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of infrared light scanning, and specifically to a near-infrared non-destructive detection device for beef carcass grading. Background Art

[0002] In the beef cattle breeding and meat processing industries, accurately evaluating the quality of beef carcasses is crucial for product grading, market pricing, and meeting consumer demands. Traditional methods for beef carcass grading, such as sensory evaluation and laboratory chemical analysis, have many drawbacks. Sensory evaluation relies on manual experience, is highly subjective, has poor accuracy and repeatability, and there are significant differences in judgments among different evaluators, making it difficult to ensure the consistency of grading. Although laboratory chemical analysis can provide accurate composition data, it is a destructive test that requires destroying samples, which not only consumes time and costs but is also not suitable for large-scale rapid detection and cannot meet the requirements of efficient and non-destructive detection in the modern meat industry.

[0003] With the development of technology, near-infrared non-destructive detection technology has gradually been applied in the field of meat quality detection due to its advantages such as rapidity, non-destructiveness, and simultaneous analysis of multiple components. It utilizes the interaction between near-infrared light and chemical components in meat and obtains meat quality information by analyzing spectral characteristics, effectively avoiding the shortcomings of traditional detection methods.

[0004] Existing near-infrared light scanning devices generally use robotic arms or rails to control the movement of the infrared emitter. It is necessary to continuously move the infrared emitter to adjust the distance from the beef carcass to ensure the imaging effect after scanning. However, the surface of the beef carcass is not flat, so it is necessary to continuously adjust the infrared emitter, which may cause damage and errors due to vibration during the continuous movement of the infrared emitter. Summary of the Invention

[0005] The purpose of the present invention is to provide a near-infrared non-destructive detection device for beef carcass grading, which solves the problem that continuous movement of the infrared emitter to ensure imaging may cause vibration and errors.

[0006] To achieve the above object, the present invention provides the following technical solution: A near-infrared non-destructive testing device for beef carcass grading, including a conveying mechanism and a distance detection mechanism, further including an infrared emission mechanism. The infrared emission mechanism includes an infrared emission head disposed on the conveying mechanism and a lens vertically moving at the bottom of the infrared emission head. The beef carcass is conveyed by the conveying mechanism and moves below the lens. The distance detection mechanism is used to detect the distance between the beef carcass and the infrared emission head. The near-infrared light emitted by the infrared emission head passes through the lens to scan the beef carcass. When the beef carcass moves below the infrared emission head and the change in the distance between the beef carcass and the infrared emission head is within the zoom range of the lens, the lens vertically moves relative to the infrared emission head. And when the change in the distance between the beef carcass and the infrared emission head exceeds the zoom range of the lens, the lens resets and the infrared emission head vertically moves.

[0007] Preferably, the distance detection mechanism includes a bracket, on which a slider is horizontally slidably connected. A vertical rod is vertically slidably connected to the slider. The bottom end of the vertical rod is connected with an inverted triangular wedge block. A through hole for the near-infrared light to pass through is opened in the middle of the inverted triangular wedge block. The inverted triangular wedge block moves on the beef carcass and fluctuates with the change in the shape of the beef carcass. A displacement sensor for detecting the sliding distance of the vertical rod is arranged on the slider.

[0008] Preferably, the distance detection mechanism further includes a lead screw rotatably connected to the bracket, and a threaded hole cooperating with the lead screw is opened on the slider.

[0009] Preferably, the infrared emission mechanism further includes an electric slide plate, which slides on the conveying mechanism, and the sliding direction of the electric slide plate is perpendicular to the moving direction of the beef carcass. The infrared emission head penetrates and is fixed on the electric slide plate.

[0010] Preferably, it further includes a variable distance mechanism. The variable distance mechanism includes a mounting plate fixedly connected to the infrared emission head. A first hydraulic rod is fixedly connected to the mounting plate. The output end of the first hydraulic rod is fixedly connected to the electric slide plate. When the displacement sensor detects that the change in the distance between the beef carcass and the infrared emission head exceeds the zoom range of the lens, the first hydraulic rod extends or contracts, thereby adjusting the distance between the beef carcass and the infrared emission head.

[0011] Preferably, the pitch-changing mechanism further includes a first piston cylinder. A first oil pipe is connected between the first piston cylinder and the first hydraulic rod. A first piston plate is slidably connected in the first piston cylinder. A first threaded rod is rotatably connected to the first piston plate. A first motor is slidably connected to the conveying mechanism. The first threaded rod is fixedly connected to the output end of the first motor. A threaded cylinder matching the first threaded rod is fixedly connected to the conveying mechanism. When the first motor is started, it can slide on the conveying mechanism, so that the first piston plate slides in the first piston cylinder.

[0012] Preferably, a zoom mechanism is further included. The zoom mechanism includes a second hydraulic rod. The second hydraulic rod is fixedly connected to the mounting plate. The output end of the second hydraulic rod penetrates through the mounting plate and is fixedly connected to the lens. When the displacement sensor detects that the change in the distance between the beef carcass and the infrared emitter is within the zoom range of the lens, the second hydraulic rod extends or retracts, so as to adjust the focal point of the near-infrared light on the beef carcass.

[0013] Preferably, the zoom mechanism further includes a second piston cylinder. A second oil pipe is connected between the second piston cylinder and the second hydraulic rod. A second piston plate is slidably connected in the second piston cylinder. A second threaded rod is rotatably connected to the second piston plate. A second motor is slidably connected to the conveying mechanism. The second threaded rod is fixedly connected to the output end of the second motor. A rectangular block is arranged on the upper part of the second threaded rod. A semi-circular threaded groove is formed on the lower surface of the rectangular block. When the second threaded rod is embedded in the semi-circular threaded groove, when the second motor is started, it can slide on the conveying mechanism, so that the second piston plate slides in the second piston cylinder.

[0014] Preferably, a reset mechanism is further included. The reset mechanism includes an N-shaped frame fixedly connected to the conveying mechanism. An electric telescopic rod is fixedly connected to the top of the N-shaped frame. A pressing block is fixedly connected to the output end of the electric telescopic rod. The rectangular block is slidably connected to the pressing block, and the pressing block and the rectangular block are in clearance fit;

[0015] A gear is rotatably connected to the conveying mechanism, and two sliding seats are fixedly connected. L-shaped claws are slidably connected to both sliding seats. The L-shaped claws are symmetrically arranged on both sides of the gear, and teeth matching the gear are arranged on both L-shaped claws;

[0016] When the first motor operates, the electric telescopic rod shortens and the gear rotates forward, so that the L-shaped claws drive the second motor to reset to make the lens reset. And after the second motor resets, the electric telescopic rod extends, and then the gear rotates in the reverse direction.

[0017] Preferably, two L-shaped plates are symmetrically connected to both sides of the briquette, an airbag is fixedly connected to the L-shaped plate, and both airbags are attached to the rectangular block.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In the present invention, the distance detection mechanism is used to detect the surface undulation of the beef carcass in real time, so as to obtain the distance between the infrared emission head and the beef carcass. When the distance between the infrared emission head and the beef carcass is within the zoom range of the lens, the lens moves vertically to change the focal length of the near-infrared light, so that the near-infrared light can converge on the surface of the beef carcass. At this time, the infrared emission head does not need to move up and down to adjust the distance. When the distance between the infrared emission head and the beef carcass exceeds the zoom range of the lens, the infrared emission head moves vertically, so that the near-infrared light can converge on the surface of the beef carcass. Since the surface undulation amplitude of the beef carcass is not large, during the process of near-infrared light scanning of the beef carcass, the infrared emission head basically does not need to move too much, thus ensuring the scanning effect and reducing the movement frequency of the infrared emission head, and ensuring that the infrared emission head will not be affected by factors such as vibration due to continuous movement, resulting in errors in scanning detection. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the structural schematic diagram of the conveying mechanism of the present invention;

[0022] Figure 3 is the structural schematic diagram of the distance detection mechanism of the present invention;

[0023] Figure 4 is the structural schematic diagram of the variable distance mechanism of the present invention;

[0024] Figure 5 is the structural schematic diagram of the zoom mechanism of the present invention;

[0025] Figure 6 is the structural schematic diagram of the reset mechanism of the present invention;

[0026] Figure 7 is the structural schematic diagram of the L-shaped claw of the present invention;

[0027] Figure 8 is the logic diagram of infrared light adjustment of the present invention.

[0028] In the figure: 100, conveying mechanism; 110, light-shielding box; 120, box door; 130, conveying rack; 140, conveyor belt; 150, inverted cone block; 200, distance detection mechanism; 210, bracket; 220, slider; 230, vertical rod; 240, inverted triangular wedge block; 250, through hole; 260, lead screw; 300, infrared emission mechanism; 310, electric skateboard; 320, infrared emitter; 330, lens; 400, variable distance mechanism; 410, mounting plate; 420, first hydraulic rod; 430, first oil pipe; 440, first piston cylinder; 450, first motor; 460, first threaded rod; 470, first piston plate; 480, threaded cylinder; 500, zoom mechanism; 510, second hydraulic rod; 520, second oil pipe; 530, second piston cylinder; 540, second motor; 550, second threaded rod; 560, second piston plate; 570, rectangular block; 600, reset mechanism; 610, N-shaped frame; 620, electric telescopic rod; 630, pressing block; 640, L-shaped plate; 650, airbag; 660, gear; 670, sliding seat; 680, L-shaped claw. Detailed implementation manners

[0029] 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.

[0030] Referring to Figures 1-7 , this embodiment provides a technical solution: a near-infrared non-destructive detection device for beef carcass grading, including a conveying mechanism 100 and a distance detection mechanism 200, and further including an infrared emission mechanism 300. The infrared emission mechanism 300 includes an infrared emitter 320 disposed on the conveying mechanism 100 and a lens 330 vertically moving at the bottom of the infrared emitter 320. The beef carcass is conveyed by the conveying mechanism 100 and moves below the lens 330. The distance detection mechanism 200 is used to detect the distance between the beef carcass and the infrared emitter 320. The near-infrared light emitted by the infrared emitter 320 passes through the lens 330 to scan the beef carcass. When the beef carcass moves below the infrared emitter 320 and the change in the distance between the beef carcass and the infrared emitter 320 is within the zoom range of the lens 330, the lens 330 vertically moves relative to the infrared emitter 320. And when the change in the distance between the beef carcass and the infrared emitter 320 exceeds the zoom range of the lens 330, the lens 330 resets and the infrared emitter 320 vertically moves.

[0031] The conveying mechanism 100 includes a light-shielding box 110. Two box doors 120 are symmetrically connected to the light-shielding box 110. A conveying rack 130 is placed inside the light-shielding box 110. A conveyor belt 140 is arranged on the conveying rack 130. The feet of the conveying rack 130 are connected with inverted cone blocks 150. The bottom wall of the light-shielding box 110 is provided with holes that are in clearance fit with the feet of the conveying rack 130 and card slots that cooperate with the inverted cone blocks 150. When the light-shielding box 110 is lifted, the feet of the conveying rack 130 move downward relative to the light-shielding box 110. After the inverted cone blocks 150 are inserted into the card slots, the entire conveying mechanism 100 is lifted. When the conveying mechanism 100 is released, the light-shielding box 110 is kept in a horizontal state. The feet of the conveying rack 130 first contact the ground, and then the bottom wall of the light-shielding box 110 contacts the ground. At this time, there is no direct contact between the conveying rack 130 and the light-shielding box 110, ensuring that the vibration during the operation of the conveyor belt 140 is not easily transmitted to the light-shielding box 110;

[0032] When detecting the beef carcass, open any one of the box doors 120, place the beef carcass on the conveyor belt 140, and the conveyor belt 140 conveys the beef carcass to the lower part of the infrared emitter 320 to receive near-infrared light scanning. The conveyor belt 140 is driven by a servo motor and runs intermittently, so that the beef carcass stops after being transported a diameter length distance scanned by the near-infrared light. When the near-infrared light scans the beef carcass to obtain the required data, the conveyor belt 140 runs again, and so on in a cycle;

[0033] To ensure the irradiation effect of the near-infrared light, the focal length of the light and the irradiation position on the beef carcass need to remain relatively consistent as the beef carcass moves. Therefore, when the beef carcass is conveyed by the conveyor belt 140, the focal point of the near-infrared light on the beef carcass needs to be continuously adjusted. The distance detection mechanism 200 then detects the surface undulation of the beef carcass in real time to obtain the distance between the infrared emitter 320 and the beef carcass. When the distance between the infrared emitter 320 and the beef carcass is within the zoom range of the lens 330, the lens 330 moves vertically to change the focal length of the near-infrared light, so that the near-infrared light can converge on the surface of the beef carcass. At this time, the infrared emitter 320 does not need to move up and down to adjust the distance. When the distance between the infrared emitter 320 and the beef carcass exceeds the zoom range of the lens 330, the infrared emitter 320 moves vertically, so that the near-infrared light can converge on the surface of the beef carcass. Since the surface undulation amplitude of the beef carcass is not large, the infrared emitter 320 basically does not need to move too much during the near-infrared light scanning of the beef carcass. Thus, it not only ensures the scanning effect but also reduces the movement frequency of the infrared emitter 320, ensuring that the infrared emitter 320 will not be affected by factors such as vibration due to continuous movement and cause errors in scanning detection.

[0034] The distance detection mechanism 200 includes a bracket 210. A slider 220 is horizontally slidably connected to the bracket 210. A vertical rod 230 is vertically slidably connected to the slider 220. The bottom end of the vertical rod 230 is connected to an inverted triangular wedge 240. A through hole 250 for near-infrared light to pass through is formed in the middle of the inverted triangular wedge 240. The inverted triangular wedge 240 moves on the beef carcass and fluctuates with the change of the shape of the beef carcass. A displacement sensor for detecting the sliding distance of the vertical rod 230 is provided on the slider 220.

[0035] The bracket 210 is fixedly connected to the conveying frame 130 and erected above the conveyor belt 140. The length direction of the inverted triangular wedge 240 is parallel to the conveying direction of the conveyor belt 140. When the beef carcass moves to the lower part of the inverted triangular wedge 240, it first contacts the inclined side of the inverted triangular wedge 240. As the beef carcass moves, the inverted triangular wedge 240 is lifted. At this time, the vertical rod 230 moves upward synchronously. The upward movement distance of the vertical rod 230 is the shortened distance between the infrared transmitting head 320 and the beef carcass. The inverted triangular wedge 240 is located directly below the infrared transmitting head 320, and a through hole 250 is formed in the middle to allow near-infrared light to pass through and irradiate on the beef carcass, ensuring accurate and synchronous distance detection.

[0036] The distance detection mechanism 200 further includes a lead screw 260 rotatably connected to the bracket 210. A threaded hole cooperating with the lead screw 260 is formed in the slider 220.

[0037] After the conveying mechanism 100 conveys the beef carcass to the end, the lead screw 260 rotates, so that the slider 220 drives the inverted triangular wedge 240 to move a distance equal to the scanning width of the infrared transmitting head 320. Subsequently, the conveying mechanism 100 conveys the beef carcass in the reverse direction and continues to scan the beef carcass until the beef carcass is fully scanned. After the displacement sensor detects that the vertical rod 230 has moved down to the lowest distance, it indicates that the inverted triangular wedge 240 has separated from the beef carcass at this time. At this time, the conveyor belt 140 stops running and only conveys the beef carcass in the reverse direction after the positions of the inverted triangular wedge 240 and the infrared transmitting head 320 are adjusted.

[0038] The infrared emission mechanism 300 further includes an electric slide plate 310. The electric slide plate 310 slides on the conveying mechanism 100, and the sliding direction of the electric slide plate 310 is perpendicular to the moving direction of the beef carcass. The infrared transmitting head 320 is inserted and fixed on the electric slide plate 310.

[0039] The electric skateboard 310 is slidably connected to the top of the light-shielding box 110, and the sliding direction is perpendicular to the conveying direction of the conveyor belt 140. When the lead screw 260 rotates, the electric skateboard 310 slides synchronously, and the sliding distance of the electric skateboard 310 is equal to the moving distance of the inverted triangular wedge 240, ensuring that the infrared emitter 320 can be directly above the inverted triangular wedge 240. The drive source of the inverted triangular wedge 240 and the drive source of the infrared emitter 320 are separately arranged to reduce the vibration influence on the infrared emitter 320.

[0040] It further includes a variable-distance mechanism 400. The variable-distance mechanism 400 includes a mounting plate 410 fixedly connected to the infrared emitter 320. A first hydraulic rod 420 is fixedly connected to the mounting plate 410. The output end of the first hydraulic rod 420 is fixedly connected to the electric skateboard 310. When the displacement sensor detects that the change in the distance between the beef carcass and the infrared emitter 320 exceeds the zoom range of the lens 330, the first hydraulic rod 420 extends or retracts, thereby adjusting the distance between the beef carcass and the infrared emitter 320.

[0041] The displacement sensor transmits the acquired distance information to the control system. Among them, when the vertical rod 230 moves upward, the distance information value is negative, and vice versa, the distance information value is positive. When the control system acquires a negative distance information value and the absolute value of this distance information exceeds the zoom range of the lens 330, it controls the first hydraulic rod 420 to shorten. When it acquires a positive distance information value and the absolute value of this distance information exceeds the zoom range of the lens 330, it controls the first hydraulic rod 420 to extend.

[0042] The variable-distance mechanism 400 further includes a first piston cylinder 440. A first oil pipe 430 is connected between the first piston cylinder 440 and the first hydraulic rod 420. A first piston plate 470 is slidably connected in the first piston cylinder 440. A first threaded rod 460 is rotatably connected to the first piston plate 470. A first motor 450 is slidably connected to the conveying mechanism 100. The first threaded rod 460 is fixedly connected to the output end of the first motor 450. A threaded cylinder 480 cooperating with the first threaded rod 460 is fixedly connected to the conveying mechanism 100. When the first motor 450 is started, it can slide on the conveying mechanism 100, so that the first piston plate 470 slides in the first piston cylinder 440.

[0043] The first piston cylinder 440 communicates with the first hydraulic rod 420 through the first oil pipe 430. The control system controls the first motor 450 to rotate forward or backward by a specific angle, enabling the first threaded rod 460 to axially move a specific distance relative to the threaded barrel 480, thereby causing the first piston plate 470 to slide a corresponding distance, and enabling the first piston cylinder 440 to deliver a fixed amount of hydraulic oil into the first hydraulic rod 420, ensuring that the infrared emitter 320 can move the required distance. The cooperation of the first threaded rod 460 and the threaded barrel 480 is used to drive the first piston plate 470 to slide, ensuring that the flow rate of the hydraulic oil remains uniform and avoiding the vibration of the infrared emitter 320 caused by the uneven telescopic speed of the first hydraulic rod 420.

[0044] It further includes a zoom mechanism 500. The zoom mechanism 500 includes a second hydraulic rod 510. The second hydraulic rod 510 is fixedly connected to the mounting plate 410. The output end of the second hydraulic rod 510 penetrates through the mounting plate 410 and is fixedly connected to the lens 330. When the displacement sensor detects that the change in the distance between the beef carcass and the infrared emitter 320 is within the zoom range of the lens 330, the second hydraulic rod 510 extends or retracts, thereby adjusting the focal point of the near-infrared light on the beef carcass.

[0045] The displacement sensor transmits the acquired distance information to the control system. Among them, when the vertical rod 230 moves upward, the distance information value is negative, and vice versa, the distance information value is positive. When the control system acquires a negative distance information value and the absolute value of this distance information is within the zoom range of the lens 330, it controls the second hydraulic rod 510 to shorten, and the shortening distance is the absolute value of the acquired distance information value. When it acquires a positive distance information value and the absolute value of this distance information is within the zoom range of the lens 330, it controls the second hydraulic rod 510 to extend, and the extension distance is also the absolute value of the acquired distance information value;

[0046] It should be noted here that the telescopic movement of the second hydraulic rod 510 also needs to consider the focal length of the lens 330. During use, adjust the telescopic logic of the second hydraulic rod 510 according to the focal length of the lens 330, or select a lens 330 with an appropriate focal length according to the telescopic logic of the second hydraulic rod 510;

[0047] If the second hydraulic rod 510 is in an unextended or retracted state when the first hydraulic rod 420 operates, the first hydraulic rod 420 directly extends or retracts, causing the infrared emitter 320 to move to the position at the height of the distance between the beef carcass set by the system. If the second hydraulic rod 510 is already in an extended or retracted state, the control system first controls the second hydraulic rod 510 to reset, and then makes the first hydraulic rod 420 extend or retract, so that the infrared emitter 320 moves to the position at the height of the distance between the beef carcass set by the system.

[0048] The zoom mechanism 500 further includes a second piston cylinder 530. A second oil pipe 520 is connected between the second piston cylinder 530 and the second hydraulic rod 510. A second piston plate 560 is slidably connected in the second piston cylinder 530. A second threaded rod 550 is rotatably connected to the second piston plate 560. A second motor 540 is slidably connected to the conveying mechanism 100. The second threaded rod 550 is fixedly connected to the output end of the second motor 540. A rectangular block 570 is arranged on the upper part of the second threaded rod 550. A semi-circular threaded groove is formed on the lower surface of the rectangular block 570. When the second threaded rod 550 is inserted into the semi-circular threaded groove, the second motor 540 can be started to slide on the conveying mechanism 100, so that the second piston plate 560 slides in the second piston cylinder 530.

[0049] The telescoping of the second hydraulic rod 510 is controlled by the operation of the second motor 540, and its operating principle is the same as that of the first motor 450. It can also make the telescoping speed of the second hydraulic rod 510 uniform, avoiding large vibration transfer values to the infrared emitter 320 when the lens 330 moves. The second hydraulic rod 510 is connected to the mounting plate 410 and can move synchronously when the infrared emitter 320 moves, ensuring that the lens 330 is always directly below the infrared emitter 320.

[0050] It further includes a reset mechanism 600. The reset mechanism 600 includes an N-shaped frame 610 fixedly connected to the conveying mechanism 100. An electric telescopic rod 620 is fixedly connected to the top of the N-shaped frame 610. A pressing block 630 is fixedly connected to the output end of the electric telescopic rod 620. The rectangular block 570 is slidably connected to the pressing block 630, and there is a clearance fit between the pressing block 630 and the rectangular block 570. A gear 660 is rotatably connected to the conveying mechanism 100, and two sliding seats 670 are fixedly connected. An L-shaped claw 680 is slidably connected to each of the two sliding seats 670. The L-shaped claws 680 are symmetrically arranged on both sides of the gear 660, and teeth meshing with the gear 660 are arranged on both of the two L-shaped claws 680. When the first motor 450 operates, the electric telescopic rod 620 shortens and the gear 660 rotates forward, so that the L-shaped claws 680 drive the second motor 540 to reset to make the lens 330 reset. And after the second motor 540 resets, the electric telescopic rod 620 extends, and then the gear 660 rotates in the reverse direction.

[0051] To ensure that the zoom range of the lens 330 is not affected after the infrared emitter 320 moves, when the control system detects the operation of the first motor 450, it controls the electric telescopic rod 620 to shorten, releases the restriction on the second threaded rod 550, and at the same time the gear 660 Figure 7When the state rotates counterclockwise, the gear 660 is rotationally connected to the light-shielding box 110 through an electric rotating rod. When the gear 660 rotates counterclockwise, the two L-shaped claws 680 approach each other synchronously, pushing the second motor 540 to the initial position. At this time, the second piston plate 560 resets, and thus the second hydraulic rod 510 resets. Subsequently, the electric telescopic rod 620 extends, causing the rectangular block 570 to approach the second threaded rod 550 again. During the meshing process of the thread teeth on the second threaded rod 550 and the rectangular block 570, the rectangular block 570 can move relative to the pressing block 630, thereby ensuring that the second motor 540 is not easily displaced. After the second threaded rod 550 is engaged with the rectangular block 570, the rectangular block 570 no longer moves relative to the pressing block 630. Subsequently, the electric telescopic rod 620 continues to extend, causing the rectangular block 570 to be pressed tightly by the pressing block 630. The lower surface of the pressing block 630 is provided with anti-slip lines to ensure that the rectangular block 570 does not move when the second threaded rod 550 rotates. After the electric telescopic rod 620 is fully extended, the control system controls the gear 660 to rotate in the reverse direction, causing the two L-shaped claws 680 to reset.

[0052] Two L-shaped plates 640 are symmetrically connected to both sides of the pressing block 630, and an airbag 650 is fixedly connected to the L-shaped plate 640. Both airbags 650 are in contact with the rectangular block 570.

[0053] The setting of the airbag 650 limits the displacement distance of the rectangular block 570 relative to the pressing block 630, preventing the rectangular block 570 from detaching from the pressing block 630.

[0054] Refer to Figure 8 This embodiment also provides an infrared light adjustment method, including the following steps:

[0055] The control system obtains the distance value of the distance detection mechanism 200, determines whether the distance value changes from the initial value. If so, it controls the first hydraulic rod 420 to operate. If not, it determines whether the distance value is within the zoom range of the lens 330. If it is within the zoom range of the lens 330, it controls the second hydraulic rod 510 to operate. If it exceeds the zoom range of the lens 330, it controls the first hydraulic rod 420 to operate.

[0056] Furthermore, the zoom range of the lens 330 is L1 + L2, where L1 is the distance from the lens 330 to the top of the travel at the current position, and L2 is the distance from the lens 330 to the bottom of the travel at the current position. When the distance value is negative, it is determined whether the absolute value of the distance value is less than L1. If it is less than, the second hydraulic rod 510 operates;

[0057] When the distance value is positive, it is determined whether the distance value is less than L2. If it is less than, the second hydraulic rod 510 operates.

[0058] Further, when the distance value does not change from the initial value and the distance value exceeds the zoom range of the lens 330, it is determined whether the second hydraulic rod 510 is in a telescopic state. If not, the first hydraulic rod 420 operates to move the infrared emitter 320 to the position of the height of the distance from the beef carcass set by the system. If so, the second hydraulic rod 510 is first reset, and then the first hydraulic rod 420 extends and retracts to move the infrared emitter 320 to the position of the height of the distance from the beef carcass set by the system.

[0059] 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 near-infrared non-destructive testing device for beef cattle carcass grading, comprising a conveying mechanism (100) and a distance detection mechanism (200), characterized in that: The invention also comprises an infrared emitting mechanism (300), wherein the infrared emitting mechanism (300) comprises an infrared emitting head (320) arranged on the conveying mechanism (100) and a lens (330) vertically moving at the bottom of the infrared emitting head (320); the beef cattle carcass is conveyed by the conveying mechanism (100) and moves under the lens (330); the distance detecting mechanism (200) is used to detect the distance between the beef cattle carcass and the infrared emitting head (320); the near infrared light emitted by the infrared emitting head (320) passes through the beef cattle carcass; The lens (330) is used to scan the beef cattle carcass. When the beef cattle carcass moves below the infrared emitting head (320), and the distance change between the beef cattle carcass and the infrared emitting head (320) is within the zoom range of the lens (330), the lens (330) moves vertically to the infrared emitting head (320); and when the distance change between the beef cattle carcass and the infrared emitting head (320) exceeds the zoom range of the lens (330), the lens (330) is reset and the infrared emitting head (320) moves vertically.

2. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 1, characterized in that: The distance detection mechanism (200) comprises a bracket (210), a slider (220) is horizontally slidably connected to the bracket (210), a vertical rod (230) is vertically slidably connected to the slider (220), an inverted triangular wedge (240) is connected to the bottom end of the vertical rod (230), a through hole (250) is provided in the middle of the inverted triangular wedge (240) for near-infrared light to pass through, the inverted triangular wedge (240) moves on the carcass of the beef cattle and rises and falls with the shape of the carcass of the beef cattle, and a displacement sensor for detecting the sliding distance of the vertical rod (230) is provided on the slider (220).

3. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 2, characterized in that: The distance detection mechanism (200) further comprises a screw rod (260) rotatably connected to the bracket (210), and the slider (220) is provided with a threaded hole that matches the screw rod (260).

4. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 3, characterized in that: The infrared emitting mechanism (300) further comprises an electric slide plate (310), wherein the electric slide plate (310) slides on the conveying mechanism (100), and the sliding direction of the electric slide plate (310) is perpendicular to the moving direction of the beef cattle carcass, and the infrared emitting head (320) is inserted into and fixed on the electric slide plate (310).

5. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 4, characterized in that: The invention also includes a distance-changing mechanism (400), wherein the distance-changing mechanism (400) includes a mounting plate (410) fixedly connected to the infrared emitting head (320), a first hydraulic rod (420) fixedly connected to the mounting plate (410), an output end of the first hydraulic rod (420) fixedly connected to the electric slide plate (310), and when the displacement sensor detects that the distance between the beef cattle carcass and the infrared emitting head (320) changes beyond the zoom range of the lens (330), the first hydraulic rod (420) extends or shortens, thereby adjusting the distance between the beef cattle carcass and the infrared emitting head (320).

6. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 5, characterized in that: The variable pitch mechanism (400) further comprises a first piston cylinder (440), wherein a first oil pipe (430) is connected between the first piston cylinder (440) and the first hydraulic rod (420), a first piston plate (470) is slidably connected inside the first piston cylinder (440), a first threaded rod (460) is rotatably connected to the first piston plate (470), a first motor (450) is slidably connected to the conveying mechanism (100), the first threaded rod (460) is fixedly connected to the output end of the first motor (450), a threaded cylinder (480) cooperating with the first threaded rod (460) is fixedly connected to the conveying mechanism (100), and the first motor (450) can slide on the conveying mechanism (100) when started, so that the first piston plate (470) slides on the first piston cylinder (440).

7. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 6, characterized in that: The invention also comprises a zoom mechanism (500), wherein the zoom mechanism (500) comprises a second hydraulic rod (510), wherein the second hydraulic rod (510) is fixedly connected to the mounting plate (410), wherein an output end of the second hydraulic rod (510) passes through the mounting plate (410) and is fixedly connected to the lens (330), and when the displacement sensor detects that the distance change between the beef cattle carcass and the infrared transmitter head (320) is within the zoom range of the lens (330), the second hydraulic rod (510) is extended or shortened, thereby adjusting the focal point of the near-infrared light on the beef cattle carcass.

8. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 7, characterized in that: The zoom mechanism (500) further comprises a second piston cylinder (530), a second oil pipe (520) being connected between the second piston cylinder (530) and the second hydraulic rod (510), a second piston plate (560) being slidably connected inside the second piston cylinder (530), a second threaded rod (550) being rotatably connected to the second piston plate (560), a second motor (540) being slidably connected to the conveying mechanism (100), the second threaded rod (550) being fixedly connected to the output end of the second motor (540), a rectangular block (570) being arranged on the upper part of the second threaded rod (550), a semicircular threaded groove being arranged on the lower surface of the rectangular block (570), when the second threaded rod (550) is embedded in the semicircular threaded groove, the second motor (540) is started to slide on the conveying mechanism (100), so that the second piston plate (560) slides on the second piston cylinder (530).

9. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 8, characterized in that: The device also comprises a reset mechanism (600), wherein the reset mechanism (600) comprises an N-shaped frame (610) fixedly connected to the conveying mechanism (100), an electric telescopic rod (620) fixedly connected to the top of the N-shaped frame (610), a pressing block (630) fixedly connected to the output end of the electric telescopic rod (620), the rectangular block (570) being slidably connected to the pressing block (630), and the pressing block (630) and the rectangular block (570) being clearance-matched; The conveying mechanism (100) is rotatably connected to a gear (660) and fixedly connected to two slide seats (670), and both slide seats (670) are slidably connected to an L-shaped claw (680), and the L-shaped claws (680) are symmetrically arranged on both sides of the gear (660), and both L-shaped claws (680) are provided with teeth that match the gear (660); When the first motor (450) is running, the electric telescopic rod (620) is shortened and the gear (660) rotates in the positive direction, so that the L-shaped claw (680) drives the second motor (540) to reset so that the lens (330) is reset, and after the second motor (540) is reset, the electric telescopic rod (620) is extended, and then the gear (660) rotates in the reverse direction.

10. The near-infrared nondestructive testing device for beef cattle carcass grading according to claim 9, characterized in that: Two L-shaped plates (640) are symmetrically connected to the two sides of the pressing block (630), and an air bag (650) is fixedly connected to the L-shaped plate (640). The two air bags (650) are both fitted with the rectangular block (570).

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