Fish fillet quality detection system

Abstract

The invention relates to a fillet quality detection system which comprises a first fixing seat arranged in an elevated mode and a control center, a first electric shaft is arranged on the first fixing seat, a light shielding plate is arranged on the side, away from the first electric shaft, of the first fixing seat in an elevated mode, the first electric shaft is connected with a first telescopic mechanism, the first telescopic mechanism is connected with a light shielding cover, and a first conveying belt is arranged below the light shielding cover. A near-infrared detector is arranged in the light shield, a plurality of first sliding grooves are formed in the side wall of the light shield at intervals, the bottoms of the first sliding grooves penetrate through the bottom of the light shield, rotating discs are arranged at the bottoms of the first sliding grooves, second telescopic mechanisms are arranged at the tops in the sliding grooves and connected with inserting rods, and barbs are arranged at the ends of the inserting rods. The inserting rod can penetrate through the rotating disc to extend out of the light shield or return into the first sliding groove, and the control center is electrically connected to the first conveying belt, the first telescopic mechanism, the second telescopic mechanism and the near-infrared detector. The water content, the fat content and the protein content of the fillets can be automatically and rapidly detected in the fillet conveying process, and the detection efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of quality detection, and in particular relates to a fish fillet quality detection system. Background Art

[0002] In the fishery and food processing industries, it is a common operation to process fish into fillets and then quickly freeze and package them for sale. First, the fish will be sent to the processing plant after being caught. In the processing plant, professional workers will carry out a series of treatments on the fish, such as removing the scales and internal organs, and then use slicing equipment to cut the fish meat into fillets of uniform thickness and size. After that, the quality inspectors will conduct sensory evaluation and testing on the fillets. After completing the quality inspection, the fillets are sent to the quick freezing equipment for freezing treatment, which is designed to maximize the freshness and quality of the fillets. The frozen fillets will be carefully sealed, and the packaging materials need to be able to prevent the fillets from being physically damaged during storage and transportation, and have good sealing properties to prevent air and moisture from entering, thereby extending the shelf life of the fillets. When consumers buy this kind of fish fillet products, it is very convenient to use. They only need to thaw the frozen fillets, and then heat them until cooked by frying, baking, steaming or boiling, and then they can be eaten directly.

[0003] However, in the prior art, fish fillet quality detection mainly relies on manual sensory inspection, which is inefficient and cannot detect the moisture content, fat content and protein content in the fish fillet using sensory organs. Summary of the invention

[0004] The invention provides a fish fillet quality detection system, which can automatically and quickly detect the moisture content, fat content and protein content of the fish fillet during the fish fillet conveying process, and has high detection efficiency.

[0005] The technical solution adopted by the present invention is:

[0006] A fish fillet quality detection system, comprising an elevated fixed seat and a control center, the fixed seat is provided with an electric shaft, a side away from the electric shaft is elevated with a light shield, the electric shaft is connected with a telescopic mechanism, the telescopic mechanism is connected with a light shield with an opening at the lower end, a conveyor belt is provided below the light shield, the conveyor belt is used for intermittently conveying fish fillets to be detected, a near-infrared detector is provided at the top of the light shield, a plurality of slide grooves are provided at intervals in the side wall of the light shield, the bottom of the slide groove runs through the bottom of the light shield, a turntable is provided at the bottom of the slide groove, a telescopic mechanism is provided at the top of the slide groove, a plug rod is connected to the telescopic mechanism, a barb is provided at the end of the plug rod, so that the plug rod can pass through the turntable and extend out of the light shield or return to the slide groove, and the control center is electrically connected to the conveyor belt, the telescopic mechanism, the telescopic mechanism and the near-infrared detector;

[0007] Perform the inspection by following the steps below:

[0008] S1, controlling the second telescopic mechanism to drive the insertion rod to pass through the outside of the turntable, and controlling the first telescopic mechanism to drive the light shield to descend so that the multiple insertion rods are respectively inserted into the edges of the fish fillet;

[0009] S2, controlling the telescopic mechanism 1 to drive the shading cover to rise and lift the fish fillet from the conveyor belt 1, controlling the electric shaft 1 to drive the shading cover to rotate and align with the shading plate, and controlling the telescopic mechanism 1 to drive the shading cover to move toward the shading plate so that the fish fillet fits on the shading plate;

[0010] S3, control described near infrared detector to detect the moisture content, fat content and protein content in the fish fillet and transmit it to control center, described control center compares moisture content, fat content and protein content with standard value;

[0011] S4. When the moisture content, fat content and protein content are respectively greater than the standard values, the telescopic mechanism 1 is controlled to drive the shading cover to move away from the shading plate, the electric shaft 1 is controlled to drive the shading cover to rotate and align with the conveyor belt 1, and the telescopic mechanism 2 is controlled to drive the insertion rod to retract into the chute 1, so that the fish fillet falls back onto the conveyor belt 1; when at least one of the moisture content, fat content and protein content is less than the standard value, the telescopic mechanism 1 is controlled to drive the shading cover to move away from the shading plate, the telescopic mechanism 2 is controlled to drive the insertion rod to retract into the chute 1, so that the fish fillet falls on the outside of the conveyor belt 1, and the electric shaft 1 is controlled to drive the shading cover to rotate and align with the conveyor belt 1;

[0012] S5, control the conveyor belt to drive the next fish fillet to move under the light shield.

[0013] Furthermore, the telescopic mechanism includes a U-shaped slide bar that is slidably arranged on an electric shaft, an electric push rod is connected between the electric shaft and the U-shaped slide bar, the light shield is connected to the end of the U-shaped slide bar, and the control center is electrically connected to the electric shaft.

[0014] Furthermore, a sponge seat is provided at the end of the U-shaped sliding rod near the light shield, and a water-absorbing sponge is provided on the sponge seat. When the insertion rod is inserted into the fish fillet, the sponge seat is pressed on the fish fillet at the rear side to absorb the accumulated water on the upper surface of the fish fillet.

[0015] Furthermore, a fixed plate 1 is elevated on one side away from the electric shaft 1, and when the light shield drives the fish fillet to fit onto the light shielding plate, the U-shaped sliding rod drives the water-absorbing sponge 1 to press onto the fixed plate 1.

[0016] Furthermore, a fixed seat 2 and a fixed plate 2 are elevated on a side away from the electric shaft 1, an electric shaft 2 is arranged on the fixed seat 2, a swing shaft is arranged on the electric shaft 2, the sunshade is arranged at one end of the swing shaft, a slide groove 2 is arranged at the other end of the swing shaft, a slide rod is arranged in the slide groove 2, an electric push rod 2 is connected between the slide rod and the inner end wall of the slide groove 2, a sponge seat 2 is arranged on the end of the slide rod away from the electric push rod 2, two water-absorbing sponges are arranged on the sponge seat 2, the control center is electrically connected to the electric shaft 2 and the electric push rod 2, when the sunshade drives the fish fillet to fit onto the sunshade, the water-absorbing sponge 1 is pressed on the fixed plate 1, the water-absorbing sponge 2 is aligned with the fixed plate 2, and the control center controls the electric push rod 2 to drive the water-absorbing sponge 2 to press on the fixed plate 2.

[0017] Furthermore, the telescopic mechanism 2 includes an electric push rod 3 arranged at the top of the slide groove 1, a slider arranged in the slide groove 1 and an external spline rod arranged at the center of the turntable, the electric push rod 3 is connected to the slider, a motor is arranged in the slider, the output shaft of the motor is connected to the internal spline sleeve, the external spline rod is slidably arranged in the internal spline sleeve and meshes with it, a push hole is eccentrically provided on the turntable, the turntable is rotatably connected to one side wall of the slide groove, the insertion rod is an L-shaped structure, the insertion rod is inserted into the push hole, and the insertion rod is connected to the internal spline sleeve

[0018] Furthermore, a plurality of conveyor belts 2 are provided at intervals on the sides of the conveyor belt 1. In step S4, when unqualified fish fillets are detected, the control center controls the telescopic mechanism 1 to drive the moving distance of the light shield according to the unqualified items, so that the light shield moves to above the corresponding conveyor belt 2, and the fish fillets are placed on the corresponding conveyor belt 2.

[0019] Furthermore, both ends of the electric shaft 1 are connected to a fixing seat 1.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The second telescopic mechanism is used to drive the insertion rod to pass through the outside of the turntable or return to the first slide slot, so that the fish fillet can be fixed on the open end of the light shield or released from the light shield. The electric shaft can be used to drive the light shield to rotate through the telescopic mechanism, so that the light shield can be respectively turned to connect with the conveyor belt or the light shield, so that the fish fillet on the conveyor belt can be lifted and turned to fit on the light shield. The moisture content, fat content and protein content in the fish fillet are detected by a near-infrared detector and transmitted to the control center. The control center compares the moisture content, fat content and protein content with the standard values. When the moisture content, fat content and protein content are respectively greater than the standard values, the fish fillet is put back on the conveyor belt. When it is unqualified, it is placed on the outside of the conveyor belt. The moisture content, fat content and protein content of the fish fillet can be automatically and quickly detected during the conveying of the fish fillet, and the detection efficiency is high.

[0022] 2. When testing, lift the fish fillet off the conveyor belt and place it between the light shield and the light shield to avoid the near-infrared light in the external environment affecting the detection accuracy, which is beneficial to improve the detection accuracy. After the test, the fish fillet can be placed on the outside of the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 for Figure 1 Sectional view at AA in the figure;

[0025] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0026] Figure 4 for Figure 1 Sectional view at CC in FIG.

[0027] Figure 5 for Figure 1 The enlarged view of D in the figure;

[0028] Figure 6 It is the electric control principle diagram of the present invention;

[0029] In the figure: 1. Conveyor belt 1; 2. Fish fillet; 3. Water-absorbing sponge 1; 4. Sponge seat 1; 5. U-shaped slide bar; 6. Fixed seat 1; 7. Electric push rod 1; 8. Electric shaft 1; 9. Near-infrared detector; 10. Light shield; 11. Insert rod; 12. Conveyor belt 2; 13. Electric shaft 2; 14. Swing shaft; 15. Fixed plate 2; 16. Light shield; 17. Fixed seat 2; 18. Fixed plate 1; 19. Barb; 20. Water-absorbing sponge 2; 21. Sponge seat 2; 22. Slide bar; 23. Slide trough 2; 24. Electric push rod 2; 25. Push hole; 26. Turntable; 27. External spline rod; 28. Internal spline sleeve; 29. ​​Motor; 30. Slider; 31. Slide trough 1; 32. Electric push rod 3; 33. Control center. DETAILED DESCRIPTION

[0030] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0031] See also Figures 1 to 6The present invention provides a fish fillet quality detection system, including a fixed seat 6 and a control center 33, the fixed seat 6 is provided with an electric shaft 8, both ends of the electric shaft 8 are connected with the fixed seat 6, which is conducive to improving the support strength of the electric shaft 8, and a shading plate 16 is provided on the side away from the electric shaft 8, the electric shaft 8 is connected with a telescopic mechanism 1, the telescopic mechanism 1 is connected with a shading cover 10 with an opening at the lower end, a conveyor belt 1 is provided below the shading cover 10, the conveyor belt 1 is parallel to the electric shaft 8, a plurality of fish fillets 2 to be detected are placed flat at intervals on the conveyor belt 1, the conveyor belt 1 is used for intermittently conveying the fish fillets 2 to be detected, and a near-infrared detector 9 is provided on the top of the shading cover 10, The near-infrared detector 9 can detect the moisture content, fat content and protein content in the fish fillet 2 by using near-infrared technology. A plurality of chutes 31 are arranged at intervals in the side wall of the light shield 10. The bottom of the chutes 31 runs through the bottom of the light shield 10. A turntable 26 is arranged at the bottom of the chutes 31. A telescopic mechanism 2 is arranged at the top of the chutes 31. The telescopic mechanism 2 is connected to a plunger 11. A bar is arranged at the end of the plunger 11. The bar can prevent the fish fillet 2 from falling off the plunger 11 when the fish fillet 2 is lifted. The telescopic mechanism 2 can drive the plunger 11 to pass through the turntable 26 and extend out of the light shield 10 or return to the chutes 31. The control center 33 is electrically connected to the conveyor belt 1, the telescopic mechanism 1, the telescopic mechanism 2 and the near-infrared detector 9.

[0032] Perform the inspection by following the steps below:

[0033] S1, the control center 33 controls the telescopic mechanism 2 to drive the insertion rod 11 to pass through the outside of the turntable 26, and the control center 33 controls the telescopic mechanism 1 to drive the light shield 10 to descend so that the multiple insertion rods 11 are respectively inserted into the edges of the fish fillet 2;

[0034] S2, the control center 33 controls the telescopic mechanism 1 to drive the light shield 10 to rise and lift the fish fillet 2 from the conveyor belt 1, the control center 33 controls the electric shaft 8 to drive the light shield 10 to rotate 90 degrees counterclockwise, so that the light shield 10 is horizontally aligned with the light shielding plate 16, and the telescopic mechanism 1 is controlled to drive the light shield 10 to move toward the light shielding plate 16, so that the fish fillet 2 is attached to the light shielding plate 16, and the fish fillet 2 is placed between the light shield 10 and the light shielding plate 16, which can prevent the near-infrared light in the external environment from irradiating the fish fillet 2 and affecting the detection accuracy of the fish fillet 2, which is conducive to improving the detection accuracy;

[0035] S3, the control center 33 controls the near infrared detector 9 to quickly detect the moisture content, fat content and protein content in the fish fillet 2 and transmits it to the control center 33, and the control center 33 compares the moisture content, fat content and protein content with the standard value;

[0036] S4, when the moisture content, fat content and protein content are respectively greater than the standard values, the control center 33 controls the telescopic mechanism 1 to drive the shading cover 10 to move away from the shading plate 16, the control center 33 controls the electric shaft 18 to drive the shading cover 10 to rotate 90 degrees clockwise, so that the shading cover 10 is vertically aligned with the conveyor belt 1, the control center 33 controls the telescopic mechanism 2 to drive the insertion rod 11 to retract into the slide slot 1 31, and the turntable 26 is used to push the fish fillet 2 back onto the conveyor belt 1;

[0037] When at least one of the moisture content, fat content and protein content is less than the standard value, it indicates that the fish fillet 2 is of poor quality or unqualified. The control center 33 controls the telescopic mechanism 1 to drive the shading cover 10 to move away from the shading plate 16. The control center 33 controls the telescopic mechanism 2 to drive the insertion rod 11 to retract into the slide slot 131. The turntable 26 pushes the fish fillet 2 to the outside of the conveyor belt 1, and controls the electric shaft 18 to drive the shading cover 10 to rotate and align with the conveyor belt 1, so that the fish fillet 2 of poor quality or unqualified can be removed from the conveyor belt 1 during the detection process.

[0038] S5, control the conveyor belt 1 to drive the next fish fillet 2 to move under the light shield 10, and repeat steps S1 to S5. During the conveying process of the fish fillet 2, the moisture content, fat content and protein content of the fish fillet 2 can be automatically and quickly detected, and the detection efficiency is high.

[0039] Preferably, the telescopic mechanism includes a U-shaped slide bar 5 slidably arranged on an electric shaft 8, an electric push rod 7 is connected between the electric shaft 8 and the U-shaped slide bar 5, a light shield 10 is connected to the end of the U-shaped slide bar 5, a control center 33 is electrically connected to the electric shaft 8, and when the control center 33 controls the electric push rod 7 to extend, the electric push rod 7 drives the U-shaped slide bar 5 to slide on the electric shaft 8, and the U-shaped slide bar 5 drives the light shield 10 away from the conveyor belt 1 or the light shield 16, and the opposite is true when the electric push rod 7 is shortened.

[0040] Preferably, a sponge seat 4 is provided at the end of the U-shaped sliding rod 5 near the light shield 10, and a water-absorbing sponge 3 is provided on the sponge seat 4. When the insertion rod 11 is inserted into the fish fillet 2, the sponge seat 4 is pressed on the rear side of the fish fillet 2 to absorb the accumulated water on the upper surface of the fish fillet 2, thereby avoiding excessive accumulation of water on the surface of the fish fillet 2 and affecting the detection accuracy.

[0041] Preferably, a fixed plate 18 is provided on a fixed frame on the side away from the electric shaft 8. When the shading cover 10 drives the fish fillet 2 to fit onto the shading plate 16, the U-shaped sliding rod 5 drives the water-absorbing sponge 3 to be pressed onto the fixed plate 18 to squeeze out the water in the water-absorbing sponge 3, thereby preventing excessive water accumulation in the water-absorbing sponge and affecting the water absorption effect on the upper surface of the fish fillet 2.

[0042] Preferably, a fixed frame 21 and a fixed plate 21 are provided on a side away from the electric shaft 18, an electric shaft 13 is provided on the fixed frame 21, a swing shaft 14 is provided on the electric shaft 13, a shading plate 16 is fixedly provided at one end of the swing shaft 14, a slide groove 23 is provided at the other end of the swing shaft 14, a slide rod 22 is provided in the slide groove 23, an electric push rod 24 is connected between the slide rod 22 and the inner end wall of the slide groove 23, an end of the slide rod 22 away from the electric push rod 24 extends out of the slide groove 23 and is fixedly provided with a sponge seat 21, a water-absorbing sponge 20 is provided on the sponge seat 21, a control center 33 is electrically connected to the electric shaft 13 and the electric push rod 24, when the control center 33 controls the electric push rod 17 to drive the U-shaped slide rod 5 When the light shield 10 moves toward the light shielding plate 16 so that the light shield 10 drives the fish fillet 2 to fit onto the light shielding plate 16, the U-shaped slide bar 5 drives the water-absorbing sponge 13 to be pressed onto the fixed plate 18 through the sponge seat 14. At this time, the water-absorbing sponge 20 is opposite to the fixed plate 15. The control center 33 controls the electric push rod 24 to drive the water-absorbing sponge 20 to be pressed onto the fixed plate 15 to squeeze out the water in the water-absorbing sponge 20, which can avoid excessive water accumulation in the water-absorbing sponge 20 and affect the water absorption effect. After squeezing out water, the control center 33 controls the electric push rod 24 to drive the water-absorbing sponge 20 to move away from the fixed plate 15 to avoid the water-absorbing sponge 20 and the sponge seat 21 from interfering with the fixed plate 15 when the swing shaft 14 rotates.

[0043] In the execution of step S2, before controlling the telescopic mechanism 1 to drive the shading cover 10 to move toward the direction close to the shading plate 16, the control center 33 controls the electric shaft 2 13 to drive the swing shaft 14 to rotate 180 degrees, and the swing shaft 14 drives the water-absorbing sponge 20 to rotate and align with the fish fillet 2 through the sponge seat 21. The control center 33 controls the telescopic mechanism 1 to drive the lower surface of the fish fillet 2 to press on the water-absorbing sponge 1 3 through the shading cover 10, and absorbs water from the lower surface of the fish fillet 2, which can avoid excessive water accumulation on the lower surface of the fish fillet 2 and affect the detection accuracy. The control center 33 controls the telescopic mechanism 1 to drive the fish fillet 2 to move away from the water-absorbing sponge 2 20 through the shading cover 10, and the control center 33 controls the electric shaft 2 13 to drive the swing shaft 14 to rotate 180 degrees, so that the shading plate 16 docks with the fish fillet 2;

[0044] In executing step S4, after the control center 33 controls the telescopic mechanism 1 to drive the shading cover 10 to move away from the shading plate 16, the control center 33 controls the swing shaft 14 to rotate 180 degrees, so that the absorbent sponge 20 turns to align with the shading cover 10, so as to absorb water from the lower surface of the fish fillet 2 in preparation for the next detection. It can absorb the accumulated water on the upper and lower surfaces of the fish fillet 2 to avoid excessive water accumulation on the fish fillet 2 affecting the detection accuracy.

[0045] Preferably, the telescopic mechanism 2 includes an electric push rod 32 fixedly arranged at the top of the slide groove 31, a slider 30 slidably arranged in the slide groove 31 and an outer spline rod 27 fixedly arranged at the center of the turntable 26, the telescopic end of the electric push rod 32 is fixedly connected to the slider 30, the electric push rod 32 can drive the slider 30 to slide in the slide groove 31, a motor 29 is arranged in the slider 30, the output shaft of the motor 29 is connected with an inner spline sleeve 28, the outer spline rod 27 is slidably arranged in the inner spline sleeve 28 and meshed therewith, a push hole 25 is eccentrically arranged on the turntable 26, the turntable 26 is rotatably connected to the side wall of the slide groove 31, the insertion rod 11 is an L-shaped structure, the insertion rod 11 is inserted into the push hole 25, and the insertion rod 11 is fixedly connected to the inner spline sleeve 28;

[0046] When the control center 33 controls the electric push rod 32 to extend, the electric push rod 32 drives the slider 30, the motor 29 and the inner spline sleeve 28 to move toward the turntable 26 through the slider 30. During this process, the outer spline rod 27 slides in the inner spline sleeve 28 and remains engaged. The inner spline sleeve 28 drives the insertion rod 11 to pass through the push hole 25 and out of the outer side of the slide groove 1 31. When the insertion rod 11 is inserted into the fish fillet 2, the motor 29 drives the inner spline sleeve 28 to rotate, and the inner spline sleeve 28 drives the turntable 26 to rotate at the bottom of the slide groove 1 31 through the outer spline rod 27. The rotating disk 26 can only rotate in the slide groove 31 but cannot slide in the slide groove 31, so that the inner spline sleeve 28 drives the insertion rod 11 and the rotating disk 26 to rotate synchronously, and when the insertion rod 11 is inserted into the fish fillet 2, the insertion rod 11 is located on the side close to the center of the light shield 10, so that after being inserted into the fish fillet 2, the motor 29 drives the insertion rod 11 to turn to the outside away from the center of the light shield 10, so that multiple insertion rods 11 flatten the fish meat, avoiding wrinkles in the fish fillet 2 after being lifted, which affects the water absorption effect of the sponge on the lower surface of the fish fillet 2.

[0047] Preferably, a plurality of conveyor belts 12 are provided at intervals on the sides of the conveyor belt 1. In step S4, when it is detected that the fish fillet 2 is unqualified, the control center 33 controls the telescopic mechanism 1 to drive the light shield 10 to move according to the unqualified item, so that the light shield 10 drives the fish fillet 2 thereon to move to the top of the corresponding conveyor belt 12. The control center 33 controls the telescopic mechanism 2 to drive the insertion rod 11 back into the chute 1 31, and the fish fillet 2 is placed on the corresponding conveyor belt 12.

[0048] The number of conveyor belts 12 is three, one conveyor belt 12 is used to receive fish fillets 2 whose moisture content, fat content and protein content are unqualified, one conveyor belt 12 is used to receive fish fillets 2 whose moisture content, fat content and protein content are unqualified, and one conveyor belt 12 is used to receive fish fillets 2 whose moisture content, fat content and protein content are unqualified. In this way, the fish fillets 2 can be divided into different quality grades according to the test results during the testing process.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fish fillet quality detection system, characterized in that: It comprises an elevated fixed seat and a control center, wherein an electric shaft is provided on the fixed seat, a light shield is provided on a side away from the electric shaft, the electric shaft is connected with a telescopic mechanism, the telescopic mechanism is connected with a light shield with an opening at the lower end, a conveyor belt is provided below the light shield, the conveyor belt is used for intermittently conveying fish fillets to be detected, a near-infrared detector is provided on the top of the light shield, a plurality of slide grooves are provided at intervals in the side wall of the light shield, the bottom of the slide groove runs through the bottom of the light shield, a turntable is provided at the bottom of the slide groove, a telescopic mechanism is provided on the top of the slide groove, a plug rod is connected to the telescopic mechanism, a barb is provided at the end of the plug rod, so that the plug rod can pass through the turntable and extend out of the light shield or return to the slide groove, and the control center is electrically connected to the conveyor belt, the telescopic mechanism, the telescopic mechanism and the near-infrared detector; Perform the inspection by following the steps below: S1, controlling the second telescopic mechanism to drive the insertion rod to pass through the outside of the turntable, and controlling the first telescopic mechanism to drive the light shield to descend so that the multiple insertion rods are respectively inserted into the edges of the fish fillet; S2, controlling the telescopic mechanism 1 to drive the shading cover to rise and lift the fish fillet from the conveyor belt 1, controlling the electric shaft 1 to drive the shading cover to rotate and align with the shading plate, and controlling the telescopic mechanism 1 to drive the shading cover to move toward the shading plate so that the fish fillet fits on the shading plate; S3, control described near infrared detector to detect the moisture content, fat content and protein content in the fish fillet and transmit it to control center, described control center compares moisture content, fat content and protein content with standard value; S4. When the moisture content, fat content and protein content are respectively greater than the standard values, the telescopic mechanism 1 is controlled to drive the shading cover to move away from the shading plate, the electric shaft 1 is controlled to drive the shading cover to rotate and align with the conveyor belt 1, and the telescopic mechanism 2 is controlled to drive the insertion rod to retract into the chute 1, so that the fish fillet falls back onto the conveyor belt 1; when at least one of the moisture content, fat content and protein content is less than the standard value, the telescopic mechanism 1 is controlled to drive the shading cover to move away from the shading plate, the telescopic mechanism 2 is controlled to drive the insertion rod to retract into the chute 1, so that the fish fillet falls on the outside of the conveyor belt 1, and the electric shaft 1 is controlled to drive the shading cover to rotate and align with the conveyor belt 1; S5, control the conveyor belt to drive the next fish fillet to move under the light shield.

2. A fish fillet quality detection system according to claim 1, characterized in that: The telescopic mechanism 1 includes a U-shaped slide bar slidably arranged on an electric shaft 1, an electric push rod 1 is connected between the electric shaft 1 and the U-shaped slide bar, the light shield is connected to the end of the U-shaped slide bar, and the control center is electrically connected to the electric shaft 1.

3. A fish fillet quality detection system according to claim 2, characterized in that: The end of the U-shaped sliding rod close to the sunshade is provided with a sponge seat, on which a water-absorbing sponge is provided. When the insertion rod is inserted into the fish fillet, the sponge seat is pressed against the fish fillet at the rear side to absorb the accumulated water on the upper surface of the fish fillet.

4. A fish fillet quality detection system according to claim 3, characterized in that: A fixing plate 1 is elevated on one side away from the electric shaft 1. When the light shield drives the fish fillet to fit onto the light shield, the U-shaped sliding rod drives the water-absorbing sponge 1 to press onto the fixing plate 1.

5. A fish fillet quality detection system according to claim 4, characterized in that: A fixed seat 2 and a fixed plate 2 are elevated on one side away from the electric shaft 1, an electric shaft 2 is arranged on the fixed seat 2, a swing shaft is arranged on the electric shaft 2, the shading plate is arranged at one end of the swing shaft, a slide groove 2 is arranged at the other end of the swing shaft, a sliding rod is arranged in the slide groove 2, an electric push rod 2 is connected between the sliding rod and the inner end wall of the slide groove 2, a sponge seat 2 is arranged at the end of the slide rod away from the electric push rod 2, two water-absorbing sponges are arranged on the sponge seat 2, the control center is electrically connected to the electric shaft 2 and the electric push rod 2, when the shading cover drives the fish fillet to fit onto the light-shielding plate, the water-absorbing sponge 1 is pressed on the fixed plate 1, the water-absorbing sponge 2 is aligned with the fixed plate 2, and the control center controls the electric push rod 2 to drive the water-absorbing sponge 2 to press on the fixed plate 2.

6. A fish fillet quality detection system according to claim 5, characterized in that: The telescopic mechanism 2 includes an electric push rod 3 arranged at the top of the slide groove 1, a slider arranged in the slide groove and an external spline rod arranged at the center of the turntable, the electric push rod 3 is connected to the slider, a motor is arranged in the slider, the output shaft of the motor is connected to the internal spline sleeve, the external spline rod is slidably arranged in the internal spline sleeve and meshes with it, a push hole is eccentrically provided on the turntable, the turntable is rotatably connected to one side wall of the slide groove, the insertion rod is an L-shaped structure, the insertion rod is inserted into the push hole, and the insertion rod is connected to the internal spline sleeve.

7. A fish fillet quality detection system according to any one of claim 6, characterized in that: A plurality of conveyor belts 2 are arranged at intervals on the sides of the conveyor belt 1. In step S4, when unqualified fish fillets are detected, the control center controls the telescopic mechanism 1 to drive the light shield to move a distance according to the unqualified items, so that the light shield moves to the top of the corresponding conveyor belt 2, and the fish fillets fall onto the corresponding conveyor belt 2.

8. A fish fillet quality detection system according to any one of claims 1 to 7, characterized in that: Both ends of the electric shaft 1 are connected with a fixing seat 1.

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