A device for detecting the maturity of watermelon

Abstract

The present invention discloses a device for detecting the ripeness of watermelons. The device comprises: a chain conveyor line including chain plates for conveying watermelons; a tray mounted on the chain plates for supporting the watermelons; a base plate for synchronous movement with the chain plates; a knocking assembly mounted on the base plate and located on one side of the chain conveyor line for knocking the watermelons to produce sound information; and a receiver assembly mounted on the other side of the chain conveyor line from the base plate for receiving the sound information. The device has the advantages of a simple structure and convenient detection.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, in particular to a device for detecting the maturity of watermelon. Background Art

[0002] When we buy watermelons, the most worrying thing is whether the watermelon is ripe. This is also the concern of the merchants. Therefore, in order to ensure that every watermelon sold by the merchants is ripe, the watermelon needs to be tested for maturity. There are many ways to identify the maturity of watermelons. The most common one is to tap the watermelon with your hands and judge its maturity by listening to the sound. This method depends entirely on the operator's experience and is difficult to master. Therefore, it is necessary to develop a watermelon maturity detection device. Summary of the Invention

[0003] In view of the shortcomings of the above technologies, the present invention provides a watermelon maturity detection device with simple structure and convenient detection.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a device for detecting the maturity of watermelons, comprising: a chain conveyor line, which includes chain plates for conveying watermelons; a tray, arranged on the chain plates, for supporting the watermelons; a base plate, which moves synchronously with the chain plates; a knocking component, arranged on the base plate and located on one side of the chain conveyor line, for knocking the watermelons to generate sound information; and a receiver component, arranged on the base plate and located on the other side of the chain conveyor line opposite to the chain conveyor line, for receiving sound information.

[0005] Preferably, an arc-shaped supporting groove is formed on the top of the tray.

[0006] Preferably, the knocking assembly includes: a base, on which a through hole is formed; a push cylinder, inserted into the through hole, the push cylinder is hollow inside and one end is open; a cylinder, arranged on the base and the piston rod is connected to the other end of the push cylinder, the cylinder drives the push cylinder to perform linear reciprocating motion in the through hole along the axial direction of the through hole; a slender rod, telescopically arranged in the hollow cavity of the push cylinder; a knocking head, detachably arranged at one end of the slender rod and located outside the push cylinder; and a first driving unit that drives the base to perform linear reciprocating motion in the vertical and horizontal directions.

[0007] Preferably, the open end of the push cylinder is detachably provided with a sleeve, the slender rod is inserted into the barrel cavity of the sleeve, a compression spring is sleeved on the slender rod, and a limiting member is detachably provided on the other end of the slender rod; wherein, one end of the compression spring abuts against the striking head and the other end abuts against the sleeve, the limiting member and the striking head are respectively located on opposite sides of the sleeve, and the limiting member is located in the hollow cavity of the push cylinder.

[0008] Preferably, the earpiece assembly includes: an outer tube that is hollow inside and open at one end; a sound pressure sensor supported in the hollow cavity of the outer tube; a sound insulation cover that is detachably arranged on the open end of the outer tube and connected to the outer tube; a sound-absorbing cotton ring mounted on the outer wall of the sound insulation cover; and a second driving unit that drives the outer tube to perform linear reciprocating motion in the vertical and horizontal directions; wherein the sound pressure sensor is connected to a connecting wire, one end of the connecting wire is electrically connected to the sound pressure sensor, and the other end extends out of the outer tube and is electrically connected to an external control unit.

[0009] Preferably, the sound pressure sensor is supported in the hollow cavity of the outer cylinder through a rubber sleeve seat, wherein the rubber sleeve seat is detachably arranged in the hollow cavity of the outer cylinder.

[0010] Preferably, it further comprises a clamping assembly detachably provided on the base plate for positioning the pallet on the chain plate, and the clamping assembly pair is provided on opposite sides of the chain plate conveyor line.

[0011] Preferably, the clamping assembly includes a clamping cylinder detachably mounted on the base plate, a roller frame fastened to the piston rod of the clamping cylinder, and a roller pivotally connected to the roller frame, wherein the movement direction of the clamping cylinder piston rod is perpendicular to the conveying direction of the chain conveyor line.

[0012] Preferably, the knocking component has a knocking path, and the earpiece component has a sound receiving path, wherein the angle between the knocking path and the sound receiving path is 90°.

[0013] Preferably, the base plate is moved synchronously with the chain plate through a third driving unit, and the movement direction of the base plate is parallel to the movement direction of the chain plate.

[0014] Compared with the prior art, the present invention has the following advantages: the watermelon ripeness detection device provided by the present invention has the advantages that the cylinder drives the push cylinder to move toward the watermelon until the knocking head hits the watermelon. During this process, since the slender rod is retractably arranged on the push cylinder, a buffer is formed when the knocking head touches the watermelon, which can ensure that the watermelon is knocked while preventing it from cracking. The device has the advantages of simple structure and easy use.

[0015] While isolating external sounds, the sound insulation cover can transmit the sound generated by knocking the watermelon to the sound pressure sensor. The sound insulation cover and the sound-absorbing cotton ring together constitute a sound collecting cover. The sound pressure sensor collects the sound information generated by knocking the watermelon and sends the sound information to the external control unit through a connecting line. The control unit determines the maturity of the watermelon through comparison and calculation. It has the advantages of simple structure and convenient detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic structural diagram of a device for detecting watermelon maturity according to the present invention;

[0017] Figure 2 is a schematic diagram of the positional relationship between the tray and the clamping assembly of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the striking assembly of the present invention;

[0019] Figure 4 Schematic diagram of the positional relationship between the push cylinder, the striking head and the compression spring of the present invention;

[0020] Figure 5 Schematic diagram of the cross-sectional relationship between the push cylinder, the striking head and the compression spring of the present invention;

[0021] Figure 6 It is a schematic diagram of the exploded structure between the push cylinder, the striking head and the compression spring of the present invention;

[0022] Figure 7 is a schematic diagram of the positional relationship between the first vertical driving unit and the first horizontal driving unit of the present invention;

[0023] Figure 8 Schematic diagram of the positional relationship between the induction seat and the induction sheet of the present invention;

[0024] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure of area A in the middle;

[0025] Figure 10 is a schematic structural diagram of the handset assembly of the present invention;

[0026] Figure 11 Schematic diagram of the positional relationship between the outer cylinder and the soundproof cover of the present invention;

[0027] Figure 12 is a schematic diagram of the main viewing direction between the outer cylinder and the soundproof cover of the present invention;

[0028] Figure 13 It is a schematic cross-sectional view between the outer cylinder and the soundproof cover of the present invention;

[0029] Figure 14 It is a schematic diagram of the exploded structure between the outer cylinder and the soundproof cover of the present invention.

[0030] In the figure: 10, chain conveyor line; 20, watermelon; 30, pallet; 40, base plate; 50, knocking assembly; 51, base; 511, push cylinder seat; 512, connecting plate; 52, push cylinder; 53, cylinder; 531, connecting piece; 54, slender rod; 55, knocking head; 551, threaded hole; 56, sleeve; 57, limit piece; 58, compression spring; 59, first drive unit; 591, first vertical drive part; 592, first horizontal drive part; 593, first connecting block; 594, second connecting block; 595, linear guide rail; 596, induction seat; 597, induction sheet. 60. Earpiece assembly; 61. Outer tube; 611. Outer tube seat; 6111. Partition; 6112. First fastening block; 6113. Second fastening block; 62. Sound pressure sensor; 63. Rubber sleeve seat; 631. First rubber sleeve; 632. Second rubber sleeve; 64. Sound insulation cover; 65. Sound-absorbing cotton ring; 66. Stainless steel hose clamp; 67. Connecting wire; 68. Waterproof connector; 69. Second drive unit; 70. Clamping assembly; 71. Clamping cylinder; 72. Roller frame; 73. Roller. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the text of the specification. If there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] There are many ways to identify the maturity of watermelons. The most common method is to tap the watermelon with your hands and judge its maturity by listening to the sound. This method is laborious and time-consuming in large-scale detection. In addition, different people tap the watermelon with different strengths and angles, which greatly affects the detection accuracy of the watermelon maturity. In view of this, the present invention provides a watermelon maturity detection device, such as Figures 1 to 14As shown, it includes: a chain conveyor line 10, which includes a chain for conveying watermelons 20; a tray 30, which is arranged on the chain and is used to support the watermelons 20; a base plate 40, which moves synchronously with the chain; a knocking component 50, which is arranged on the base plate 40 and located on one side of the chain conveyor line 10, and is used to knock the watermelons 20 to generate sound information; and an earpiece component 60, which is arranged on the base plate 40 and located on the other side of the chain conveyor line 10, and is used to receive sound information. Figures 3 to 6 As shown, the knocking assembly 50 includes: a base 51, which is formed with a through hole; a push cylinder 52, which is inserted into the through hole, and the push cylinder 52 is hollow inside and has an open end; a cylinder 53, which is provided on the base 51 and the piston rod is connected to the other end of the push cylinder 52, and the cylinder 53 drives the push cylinder 52 to perform linear reciprocating motion in the through hole along the axial direction of the through hole; a slender rod 54, which is telescopically provided in the hollow cavity of the push cylinder 52; a knocking head 55, which is detachably provided at one end of the slender rod 54 and is located outside the push cylinder 52; and a first driving unit 59 that drives the base 51 to perform linear reciprocating motion in the vertical and horizontal directions. Figures 10 to 14 As shown, the earpiece assembly 60 includes: an outer tube 61 which is hollow inside and open at one end; a sound pressure sensor 62 supported in the hollow cavity of the outer tube 61; a sound insulation cover 64 which is detachably arranged on the open end of the outer tube 61 and is connected to the outer tube 61; a sound-absorbing cotton ring 65 which is sleeved on the outer wall of the sound insulation cover 64; and a second driving unit 69 which drives the outer tube 61 to perform linear reciprocating motion in the vertical and horizontal directions; wherein the sound pressure sensor 62 is connected to a connecting line 67, one end of the connecting line 67 is electrically connected to the sound pressure sensor 62, and the other end extends out of the outer tube 61 and is electrically connected to an external control unit (not shown). During operation, the first driving unit 59 drives the knocking head 55 close to the watermelon 20, and the cylinder 53 pushes the push tube 52 to move toward the side of the watermelon 20 until the knocking head 55 hits the watermelon 20. In this process, since the slender rod 54 is arranged on the push tube 52 in a telescopic manner, a buffer can be formed when the knocking head 55 touches the watermelon 20 to slow down the impact force generated by the knocking head 55, ensuring that the watermelon is knocked while avoiding the watermelon from being cracked. The sound insulation cover 64 is connected to the open end of the outer tube 61 by a stainless steel throat clamp 66. The sound insulation cover 64 is a cylinder with a hollow interior and open ends. The sound insulation cover 64 can transmit the sound generated by knocking the watermelon to the sound pressure sensor 62 while isolating the external sound. The sound insulation cover 64 and the sound-absorbing cotton ring 65 together constitute a sound collecting cover. The sound pressure sensor 62 collects the sound information generated by knocking the watermelon and sends the sound information to the external control unit through the connecting line 67. The control unit determines the maturity of the watermelon by comparison and calculation, and has the advantages of simple structure and convenient detection. In this solution, the knocking assembly 50 has a knocking path, and the earpiece assembly 60 has a sound receiving path. The knocking path is the axial direction of the push tube 52, and the sound receiving path is the axial direction of the sound insulation cover 64. The sound insulation cover 64 is coaxially arranged with the outer tube 61. Figure 1 As shown, the angle between the knocking path and the sound receiving path is 90°. The purpose of this setting is to enable the sound information generated by knocking to be better transmitted to the sound pressure sensor 62, which has the advantage of good sound collection effect.

[0033] As an embodiment of the present solution, an arc-shaped supporting groove (not shown) is formed on the top of the tray 30. Through the arc-shaped supporting groove, the watermelon 20 can be more firmly supported on the tray 30, providing a guarantee for the smooth progress of subsequent inspection operations.

[0034] As an embodiment of this solution, Figures 4 to 6 As shown, the striking head 55 is made of nylon material. The striking head 55 is threadedly connected to the slender rod 54. Specifically, a first threaded portion is formed on one end of the slender rod 54, and a threaded hole 551 is formed on the striking head 55 to match the first threaded portion. This has the advantages of stable and reliable connection and easy assembly and disassembly. The base 51 includes a push cylinder seat 511 that supports the push cylinder 52 and a connecting plate 512 fixedly connected to the push cylinder seat 511; wherein the connecting plate 512 is detachably mounted on the first drive unit 59, and the cylinder 53 is detachably mounted on the connecting plate 512. The piston rod of the cylinder 53 is connected to the other end of the push cylinder 52 via a connecting member 531; wherein one end of the connecting member 531 is detachably connected to the other end of the push cylinder 52, and the other end is detachably connected to the piston rod of the cylinder 53.

[0035] As an embodiment of this solution, Figures 4 to 6 As shown, the slender rod 54 is telescopically arranged on the push tube 52 through the sleeve 56, the limit piece 57 and the compression spring 58. Specifically, the open end of the push tube 52 is detachably provided with a sleeve 56, the slender rod 54 is inserted into the barrel cavity of the sleeve 56, and the compression spring 58 is sleeved on the slender rod 54. The other end of the slender rod 54 can also be detachably provided with a limit piece 57; wherein, one end of the compression spring 58 abuts against the knocking head 55, and the other end abuts against the sleeve 56, the limit piece 57 and the knocking head 55 are respectively located on the opposite sides of the sleeve 56, and the limit piece 57 is located in the hollow cavity of the push tube 52; a second threaded portion is formed on the other end of the slender rod 54, and the limit piece 57 is a limit nut that cooperates with the second threaded portion.

[0036] As an embodiment of this solution, Figures 11 to 14As shown, the sound pressure sensor 62 is supported in the hollow cavity of the outer cylinder 61 by a rubber sleeve seat 63, wherein the rubber sleeve seat 63 is detachably disposed in the hollow cavity of the outer cylinder 61. Specifically, the rubber sleeve seat 63 is connected to the outer cylinder 61 by bolts, which has the advantages of stable and reliable connection and easy assembly and disassembly. In this embodiment, the rubber sleeve seat 63 includes a first rubber sleeve and a second rubber sleeve, wherein the first rubber sleeve and the second rubber sleeve are detachably connected, and the first rubber sleeve and the second rubber sleeve are arranged to form a housing space for accommodating the sound pressure sensor 62; the first rubber sleeve and the second rubber sleeve have the same structure. Taking the first rubber sleeve as an example, the first rubber sleeve is semi-cylindrical, and a circular arc groove is formed on the rectangular straight plane of the semi-cylinder along its axial direction, and the diameter of the circle where the circular arc groove is located is less than or equal to the diameter of the outer wall of the sound pressure sensor 62.

[0037] As an embodiment of this solution, Figures 11 to 14 As shown, the outer cylinder 61 is provided with a through hole for the connecting wire 67 to extend to the outside of the outer cylinder 61. A waterproof connector 68 is fixedly installed in the through hole, and the waterproof connector 68 is formed with a channel for routing the connecting wire 67. The outer cylinder 61 is detachably mounted on the outer cylinder base 611, which is detachably mounted on the second drive unit 69. The outer cylinder base 611 includes a partition 6111 detachably mounted on the second drive unit 69, a first fastening block 6112 fixedly mounted on the partition 6111, and a second fastening block 6113 detachably connected to the first fastening block 6112. The first fastening block 6112 and the second fastening block 6113 are both provided with a groove for accommodating the outer cylinder 61.

[0038] As an embodiment of this solution, the first drive unit 59 and the second drive unit 69 drive different objects, but the first drive unit 59 and the second drive unit 69 have the same structure. For the sake of convenience, only one of the two units is described, and the first drive unit 59 is taken as an example. Figure 7 As shown, the first drive unit 59 includes a first vertical drive portion 591 and a first horizontal drive portion 592 that drives the first vertical drive portion 591 to perform linear reciprocating motion in the horizontal direction; wherein the first vertical drive portion 591 and the first horizontal drive portion 592 are detachably connected; in this solution, the first vertical drive portion 591 is a screw mechanism driven by a motor; the first horizontal drive portion 592 is a belt transmission mechanism driven by a motor; the first vertical drive portion 591 and the first horizontal drive portion 592 are detachably connected through a connecting block unit, specifically, as shown in FIG. Figures 7 to 9As shown, the connecting block unit includes a first connecting block 593 detachably arranged on the first vertical driving part 591, a second connecting block 594 connecting the first connecting block 593 and the transmission belt, and a linear guide rail 595 horizontally installed on the first horizontal driving part 592, wherein the transmission belt is clamped between the first connecting block 593 and the second connecting block 594, and the second connecting block 594 is detachably arranged on the first connecting block 593 by screws. The first vertical driving part 591 is also provided with a slider (not shown in the figure) that cooperates with the linear guide rail 595; the first driving unit 59 is also provided with a photoelectric sensor unit for limiting the stroke, and the photoelectric sensor unit includes a sensing seat 596 fastened to the first horizontal driving part 592 and a sensing sheet 597 fastened to the first vertical driving part 591. In this solution, the first vertical driving part 591 of the first driving unit 59 drives the base 51 to perform lifting and lowering movements in the vertical direction, and the second vertical driving part of the second driving unit 69 drives the outer cylinder seat 611 to perform lifting and lowering movements in the vertical direction. The base 51 and the first vertical driving part 591 are detachably connected, and the outer cylinder seat 611 and the second driving unit 69 are detachably connected.

[0039] As an embodiment of this solution, Figure 1 and Figure 2 As shown, the watermelon maturity detection device further includes a clamping assembly 70 detachably provided on the base plate 40 for positioning the tray 30 on the chain plate, and the clamping assembly 70 is provided on opposite sides of the chain plate conveyor line 10. Figure 2 As shown, the clamping assembly 70 includes a clamping cylinder 71 detachably arranged on the base plate 40, a roller frame 72 fastened to the piston rod of the clamping cylinder 71, and a roller 73 pivotally connected to the roller frame 72, wherein the movement direction of the piston rod of the clamping cylinder 71 is perpendicular to the conveying direction of the chain conveyor line 10, and a wheel groove matching the roller 73 is formed on the outer circumferential wall surface of the pallet 30, and the surface of the roller 73 installed on the roller frame 72 is an arc-shaped surface matching the outer circumferential wall surface of the pallet 30; the clamping assembly 70 can realize the positioning of the pallet 30, and has the advantage of good positioning effect.

[0040] In one embodiment of this solution, the base plate 40 is driven by a third drive unit (not shown) to achieve synchronous movement with the chain plate. The base plate 40 moves in a direction parallel to the direction of movement of the chain plate. The third drive unit is capable of driving the base plate 40 to perform horizontal linear reciprocating motion. Preferably, the third drive unit is a rack and pinion mechanism.

[0041] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A device for detecting the maturity of watermelon, characterized in that: include: A chain conveyor line (10) comprising a chain for conveying watermelons (20); A tray (30) is provided on the chain plate and is used to support the watermelon (20); a base plate (40) moves synchronously with the chain plate; a knocking assembly (50) is provided on the base plate (40) and is located on one side of the chain plate conveyor line (10) and is used to knock the watermelon (20) to generate sound information; and an earpiece assembly (60) is provided on the other side of the base plate (40) and is located on the chain plate conveyor line (10) and is used to receive the sound information; The top of the tray (30) is formed with an arc-shaped supporting groove; The knocking assembly comprises: a base (51) having a through hole formed thereon; a push cylinder (52) inserted into the through hole, wherein the push cylinder (52) is hollow inside and has an open end; a cylinder (53) arranged on the base (51) and a piston rod connected to the other end of the push cylinder (52), wherein the cylinder (53) drives the push cylinder (52) to perform linear reciprocating motion in the through hole along the axial direction of the through hole; a slender rod (54) telescopically arranged in the hollow cavity of the push cylinder (52); a knocking head (55) detachably arranged at one end of the slender rod (54) and located outside the push cylinder (52); and a first driving unit (59) driving the base (51) to perform linear reciprocating motion in the vertical and horizontal directions; The open end of the push cylinder (52) is detachably provided with a sleeve (56), the slender rod (54) is inserted into the barrel cavity of the sleeve (56), the slender rod (54) is sleeved with a compression spring (58), and the other end of the slender rod (54) is detachably provided with a limiting member (57); wherein, one end of the compression spring (58) abuts against the knocking head (55), and the other end abuts against the sleeve (56), the limiting member (57) and the knocking head (55) are respectively located on opposite sides of the sleeve (56), and the limiting member (57) is located in the hollow cavity of the push cylinder (52).

2. The device for detecting the ripeness of watermelon according to claim 1, wherein: The earpiece assembly (60) includes: an outer tube (61) that is hollow inside and open at one end; a sound pressure sensor (62) supported in the hollow cavity of the outer tube (61); a sound insulation cover (64) that is detachably arranged on the open end of the outer tube (61) and is connected to the outer tube (61); a sound-absorbing cotton ring (65) sleeved on the outer wall of the sound insulation cover (64); and a second driving unit (69) that drives the outer tube (61) to perform linear reciprocating motion in the vertical and horizontal directions; wherein the sound pressure sensor (62) is connected to a connecting line (67), one end of the connecting line (67) is electrically connected to the sound pressure sensor (62), and the other end extends out of the outer tube (61) and is electrically connected to an external control unit.

3. The device for detecting the ripeness of watermelon according to claim 2, wherein: The sound pressure sensor (62) is supported in the hollow cavity of the outer cylinder (61) via a rubber sleeve seat (63), wherein the rubber sleeve seat (63) is detachably arranged in the hollow cavity of the outer cylinder (61).

4. The device for detecting the ripeness of watermelon according to claim 1, wherein: It also includes a clamping assembly (70) detachably arranged on the base plate (40) for positioning the tray (30) on the chain plate, wherein the clamping assembly (70) is arranged on two opposite sides of the chain plate conveyor line (10).

5. The device for detecting the ripeness of watermelon according to claim 4, wherein: The clamping assembly (70) includes a clamping cylinder (71) detachably mounted on the base plate (40), a roller frame (72) fastened to the piston rod of the clamping cylinder (71), and a roller (73) pivotally connected to the roller frame (72), wherein the movement direction of the piston rod of the clamping cylinder (71) is perpendicular to the conveying direction of the chain conveyor line (10).

6. The device for detecting the ripeness of watermelon according to claim 1, wherein: The knocking component (50) has a knocking path, and the earpiece component (60) has a sound receiving path, wherein the angle between the knocking path and the sound receiving path is 90°.

7. The device for detecting the ripeness of watermelon according to claim 1, wherein: The base plate (40) is moved synchronously with the chain plate through a third driving unit, and the movement direction of the base plate (40) is parallel to the movement direction of the chain plate.

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