Auxiliary lifting device for food detection

Abstract

The invention relates to an auxiliary lifting device for food detection, the auxiliary lifting device is arranged in a food detection bin, a detection camera, an X-ray light source and a transmission device are arranged in the detection bin, the transmission device is in butt joint with front and rear feeding and discharging conveyor belts of the detection bin, and the camera and the X-ray light source are located above the transmission device. The auxiliary lifting device is arranged below the conveying device and comprises a lifting air cylinder, a rotating motor and a lifting disc which are sequentially connected from bottom to top, and the output end of the lifting air cylinder faces the conveying device. The output end of the lifting air cylinder is provided with the rotating motor. The output end of the rotating motor is located on the side away from the lifting air cylinder and is in driving connection with the lifting disc. Compared with the prior art, stable rotation detection of large elliptical fruits such as durian and the like can be realized, and the imaging quality and the detection accuracy are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of food detection, and in particular to an auxiliary lifting device for food detection. Background Art

[0002] Before large fruits like durian are officially released for sale, their appearance and maturity must be inspected to determine if they are insect-infested, ripe, quality-determined, or moldy. Only fruits that pass these inspections are put on the shelves and graded for sale based on their quality.

[0003] For example, the durian internal quality detection system disclosed in Chinese patent CN202311681758.1 places the durian on a rotating platform, which is driven by a conveyor belt through an X-ray detection device to perform non-destructive testing of the durian's internal quality. However, for large, oval fruits with irregular shapes, such as durian, it is difficult to maintain balance on the moving rotating platform and they are prone to rolling. In addition, the size and shape of different durian individuals vary greatly, resulting in unstable X-ray imaging, which is not conducive to subsequent image-based detection and grading of fruit quality. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide an auxiliary lifting device for food inspection.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An auxiliary lifting device for food inspection, the auxiliary lifting device is arranged in a food inspection chamber, which is equipped with an inspection camera, an X-ray light source, and a transmission device connected to the front and rear feeding and discharging conveyor belts of the inspection chamber. The camera and X-ray light source are arranged above the transmission device, and the auxiliary lifting device is arranged below the transmission device. It includes a lifting cylinder, a rotary motor, and a lifting plate connected in sequence from bottom to top;

[0007] The lifting cylinder is arranged in a vertical direction, the output end of the lifting cylinder faces the transmission device, and the rotary motor is installed at the output end of the lifting cylinder;

[0008] The output end of the rotary motor is located at a side away from the lifting cylinder, and the output end of the rotary motor is driven and connected to the lifting plate.

[0009] As a preferred technical solution, the transmission device includes: a roller fixing plate, a roller, a synchronous motor, a power transmission shaft and a synchronous belt;

[0010] The two rows of rollers are arranged on the roller fixing plate along the food conveying direction of the detection bin, and one or more synchronous motors are arranged in the roller fixing plate.

[0011] As a preferred technical solution, the lifting disc is arranged between the two rows of rollers, and the upper surface of the lifting disc is concave with a high edge and a low center.

[0012] As a preferred technical solution, the upper surface of the lifting disc is coated with an anti-skid coating or provided with a raised anti-skid structure.

[0013] As a preferred technical solution, when the lifting cylinder is in a retracted state, the lifting disc is located below the upper surface of the conveying device.

[0014] As a preferred technical solution, when the lifting cylinder is in an extended state, the lifting disc extends above the upper surface of the conveying device.

[0015] As a preferred technical solution, a reset optical coupler is arranged on the side of the rotary motor, and the reset optical coupler is signal-connected with the lifting cylinder.

[0016] As a preferred technical solution, the reset optical coupler includes a light-emitting diode and a photoelectric receiver, and the rotary motor is provided with a baffle extending from the opposite sides of the rotary motor; the light-emitting diode and the photoelectric receiver are oppositely arranged on the two sides of the baffle.

[0017] As a preferred technical solution, an impurity guide disc is arranged below the conveying device.

[0018] As a preferred technical solution, one end of the impurity guide disc is higher than the other end, and the inclination angle is 15°-30°.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1) The present application provides an auxiliary lifting device for food detection, which can first lift the target to the height position corresponding to the X-ray light source for stable X-ray detection imaging; then the lifting disc is rotated by the DD rotary motor, and the appearance is detected by the camera, which can realize stable rotation detection of large oval fruits such as durians, and ensure the imaging quality and detection accuracy.

[0021] 2) The lifting disc in the present application is a disc with a high outer edge and a low inner edge, which can automatically center the durian to ensure its position and prevent rolling during rotation detection. Moreover, the lifting disc is designed with a hollow structure, which can effectively avoid unnecessary shadows on the X-ray source and the camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a large fruit X-ray detection system;

[0023] Figure 2 This is a schematic structural diagram of the auxiliary lifting device for food testing according to the present invention;

[0024] The numbers in the figure are as follows: 1. Durian, 2. Lifting plate, 3. Roller fixing plate, 4. Roller, 5. Synchronous belt, 6. Synchronous motor, 7. Impurity guide plate, 8. Lifting cylinder, 9. Detection frame, 10. Power transmission shaft, 11. Reset optocoupler, 12. Rotating motor. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0027] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0028] Example 1

[0029] The present invention provides an auxiliary lifting device for food detection, which is used for Figure 1 The X-ray detection system for large fruits such as durian is shown. The detection chamber is equipped with a detection camera and an X-ray light source. The detection frame 9 of the detection chamber is equipped with a transmission device that is flush with the front and rear feeding and discharging conveyor belts. The camera and X-ray light source are located above the transmission device. A lifting and rotating structure and an impurity guide plate 7 are installed below the transmission device. Figure 2 As shown, the auxiliary lifting device is arranged below the transmission device, and specifically includes: a lifting plate 2, a lifting cylinder 8, a reset optical coupler 11 and a rotating motor 12.

[0030] The transmission device specifically comprises: a roller 4, a roller fixing plate 3, and a synchronous motor 6 for driving the roller 4. The upper surface of the roller fixing plate 3 is flush with the front and rear feeding and discharging conveyors, and two rows of rollers 4 are arranged on the roller fixing plate 3 along the fruit conveying direction. The roller fixing plate 3 is provided with a slot for accommodating the lifting disc 2 between the two rows of rollers 4. One or more synchronous motors 6 are arranged inside the roller fixing plate 3, the output end of the synchronous motor 6 is provided with a power transmission shaft 10, the power transmission shaft 10 connects the roller 4 through the synchronous belt 5, and the output of the synchronous motor 6 drives the roller 4 to reciprocatingly roll through the power transmission shaft 10 and the synchronous belt 5.

[0031] The lifting rotating structure specifically comprises: a lifting cylinder 8, a rotating motor 12, and a lifting disc 2. Specifically, the bottom of the lifting cylinder 8 is fixedly connected with the detection frame 9 through bolts, the output end of the lifting cylinder 8 is connected with the lifting disc 2 through the rotating motor 12, the rotating motor is a servo motor, the rated power is 200W, the rated rotating speed is 3000rpm, and the output rotating speed is reduced to 60rpm through a speed reducer, so as to ensure the stability of the food in the rotating process. The output shaft of the rotating motor is connected with the center of the lifting disc through a key, so that the slipping phenomenon does not occur in the rotating process.

[0032] The lifting disc 2 is arranged between the two rows of rollers 4. The upper surface of the lifting disc 2 is concave with the edge being higher than the center, and in this embodiment, the edge is 20mm higher than the center, and the concave angle is 5°. This design can prevent the food from sliding due to centrifugal force in the rotating process. The concave receiving surface of the lifting disc 2 is provided with an anti-skid coating, and the surface roughness Ra value is 3.2μm; or a convex anti-skid structure can be arranged on the upper surface of the lifting disc 2 to increase the friction between the food and the lifting disc 2, and further prevent the food from sliding in the rotating process.

[0033] As another implementation manner of the application, further, the lifting disc 2 is hollowed out in one direction, the hollowed-out area accounts for 60% of the disc area, the hollowed-out part adopts a grid structure, the grid spacing is 10mm, and when the lifting disc 2 is installed, the hollowed-out direction is arranged along the X-ray light source emission direction, so as to ensure that the food is supported with sufficient strength, while the absorption of X-rays is minimized, and the detection accuracy is improved.

[0034] In the initial state, the lifting plate 2 is below the roller 4. When detection is needed, the lifting cylinder 8 rises, and after the lifting plate 2 is lifted to a predetermined position, the rotary motor 12 starts to work, driving the durians on the lifting plate 2 to rotate, realizing the rotation detection of the durians. The rotary motor 12 is further provided with a reset photoelectric coupler 11 for detecting the rotation angle thereof, which is in signal connection with the lifting cylinder 8. The reset photoelectric coupler 11 in the embodiment is installed on the side of the rotary motor, and is composed of a light emitting diode and a photoelectric receiver. The opposite sides of the rotary motor 12 are respectively provided with a baffle extending out of the rotary motor, and the light emitting diode and the photoelectric receiver are oppositely arranged on the two sides of the baffles. In the initial state, the baffles will shield the light so that the reset photoelectric coupler 11 is in the off state. When the rotary motor 12 receives a work instruction to start rotating, the baffles will no longer shield the photoelectric receiver, and the reset photoelectric coupler 11 will be triggered. When the rotary motor 12 rotates to 180 degrees, the baffle on the other side of the rotary motor 12 will again shield the light beam, and the photoelectric receiver will not be able to receive the light signal, and the reset photoelectric coupler 11 will again be in the off state. At this time, the lifting plate 2 has completed the rotation detection, the rotary motor 12 stops rotating, and the lifting cylinder 8 retracts and descends to the initial position.

[0035] The lower part of the roller fixing plate 3 is further provided with an inclined impurity guide plate 7. A certain gap is left between the adjacent two rollers 4, the impurity guide plate 7 is arranged along the direction of the roller 4, and the horizontal height of one end is higher than that of the other end. The impurity guide plate is made of stainless steel, with a thickness of 1.5 mm and an inclination angle of 15°-30°, for collecting food debris or impurities falling from the gap between the rollers, and guiding them to the collection container outside the detection bin, preventing the influence of impurities on fruit detection.

[0036] The specific working principle of the auxiliary lifting device is as follows:

[0037] The durian enters the durian X-ray inspection chamber via the infeed conveyor. The lifting tray 2 is positioned entirely below the upper surface of the roller mounting plate 3. The synchronous motor 6 rotates, driving the synchronous belt 5 through the power transmission shaft 10, which in turn drives the roller 4 to convey the durian 1 to the top of the lifting tray 2. The exterior camera, already installed in the X-ray inspection chamber, verifies that the durian is centered on the lifting tray 2. If not, the synchronous motor 6 rotates back and forth, moving the roller 4 to the center of the lifting tray 2. The durian's rotation is then inspected. The lifting cylinder 8 raises the durian to a specified height, and the inspection chamber begins X-ray imaging. Simultaneously, the DD rotary motor 12 begins rotating. When the DD rotary motor 12 reaches 180 degrees, the reset optical coupler 11 detects the reset state. At this point, the inspection chamber ceases X-ray inspection, and the lifting cylinder 8 returns to its initial position. The synchronous motor 6 then begins operating, driving the roller 4 to discharge the durian to the discharge line. This repetitive process continues for subsequent durian inspections.

[0038] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. An auxiliary lifting device for food inspection, wherein the auxiliary lifting device is arranged in a food inspection chamber, wherein the inspection chamber is provided with an inspection camera, an X-ray light source, and a transmission device docked with the front and rear feeding and discharging conveyor belts of the inspection chamber, wherein the camera and the X-ray light source are arranged above the transmission device, characterized in that: The auxiliary lifting device is arranged below the transmission device and comprises a lifting cylinder (8), a rotary motor (12) and a lifting plate (2) connected in sequence from bottom to top; The lifting cylinder (8) is arranged in a vertical direction, the output end of the lifting cylinder (8) faces the transmission device, and the rotary motor (12) is installed at the output end of the lifting cylinder (8); The output end of the rotary motor (12) is located on a side away from the lifting cylinder (8), and the output end of the rotary motor (12) is driven and connected to the lifting plate (2).

2. The auxiliary lifting device for food inspection according to claim 1, characterized in that: The transmission device comprises: a roller fixing plate (3), a roller (4), a synchronous motor (6), a power transmission shaft (10) and a synchronous belt (5); Two rows of rollers (4) are arranged on the roller fixing plate (3) along the food conveying direction of the detection chamber, one or more synchronous motors (6) are arranged inside the roller fixing plate (3), and a power transmission shaft (10) is provided at the output end of the synchronous motor (6). The power transmission shaft (10) is connected to the rollers (4) through a synchronous belt (5), and a gap is provided between two adjacent rollers (4).

3. The auxiliary lifting device for food inspection according to claim 2, characterized in that: The lifting plate (2) is arranged between two rows of rollers (4), and the upper surface of the lifting plate (2) is concave with high edges and a low center.

4. The auxiliary lifting device for food inspection according to claim 3, characterized in that: The upper surface of the lifting plate (2) is coated with an anti-slip coating or provided with a raised anti-slip structure.

5. The auxiliary lifting device for food inspection according to claim 3, characterized in that: When the lifting cylinder (8) is in a retracted state, the lifting plate (2) is entirely located below the upper surface of the transmission device.

6. The auxiliary lifting device for food inspection according to claim 3, characterized in that: When the lifting cylinder (8) is in an extended state, the lifting plate (2) extends above the upper surface of the transmission device.

7. The auxiliary lifting device for food inspection according to claim 1, characterized in that: A reset optical coupler (11) is installed on the side of the rotary motor (12), and the reset optical coupler (11) is connected to the lifting cylinder (8) signal.

8. The auxiliary lifting device for food inspection according to claim 7, characterized in that: The reset optical coupler (11) includes a light emitting diode and a photoelectric receiver; a baffle extending along the rotating motor is respectively provided on opposite sides of the rotating motor (12); the light emitting diode and the photoelectric receiver are relatively provided on both sides of the baffle.

9. The auxiliary lifting device for food inspection according to claim 1, characterized in that: An impurity guide tray (7) is provided below the transmission device.

10. The auxiliary lifting device for food inspection according to claim 9, characterized in that: The impurity guide plate (7) has one end with a higher level than the other end, and an inclination angle of 15°-30°.

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