Acoustic online detection device and nondestructive detection method for recessive cracks on surfaces of poultry eggs based on continuous ripple array active excitation

Abstract

The invention relates to an acoustic online detection device and nondestructive detection method for hidden cracks on the surfaces of poultry eggs based on continuous ripple array active excitation, and the device comprises an active excitation sound production mechanism which is configured to push the poultry eggs to roll to contact and collide with a ripple array mechanism so as to excite sound waves, and comprises a poultry egg detection channel and a poultry egg pushing mechanism, the poultry egg pushing mechanism is arranged on one side of the poultry egg detection channel and can slide in the first direction of the poultry egg detection channel, and a ripple array mechanism which makes contact and collides with poultry eggs to excite sound waves is arranged in the poultry egg detection channel; the sound wave collection mechanism is configured to collect sound waves excited by the poultry eggs and the ripple array mechanism, the poultry eggs are arranged between the sound wave collection mechanism and the poultry egg pushing mechanism, and the sound wave collection mechanism synchronously moves along the poultry egg detection channel along with the poultry egg pushing mechanism; and the signal processing equipment is configured to receive the sound wave information acquired by the sound wave acquisition mechanism and detect and determine whether cracks exist on the surfaces of the poultry eggs or not according to the acquired sound wave information. According to the technology, sound production is excited through contact collision between the poultry eggs and the corrugated array mechanism, the sound collection mechanism rolls along with the poultry eggs to collect excitation sound waves, tiny recessive cracks on the surfaces of eggshells of the poultry eggs can be detected, the detection rate of poultry egg recessive crack detection is increased, misjudgment is avoided, high adaptability is embodied in the actual application process, and the detection efficiency is improved. The method can be used for egg quality detection and grade evaluation.

Description

Technical Field

[0001] This application belongs to the field of online non-destructive testing technology for cracks in poultry eggs, and particularly relates to an acoustic online detection device and non-destructive testing method for hidden cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array. Background Technology

[0002] Egg quality inspection is a crucial step in the egg production process. Cracks in eggs reduce shell strength, making them prone to breakage and hindering collection, transportation, packaging, and storage. Furthermore, pathogens can more easily enter the egg through cracks, shortening its shelf life and potentially infecting consumers. Egg cracks are categorized into complete cracks and hidden cracks. Hidden cracks occur when the outermost protective membrane is intact, but the bony layer has minute cracks. These cracks are difficult to detect with the naked eye but can lead to leakage of egg liquid or bacterial invasion during transportation or storage due to vibration or pressure. Hidden crack eggs are also called "dark crack eggs." Complete cracks, on the other hand, mean that both the shell and shell membrane are ruptured. Completely cracked eggs are usually discarded during production, but hidden cracks, due to their minute size, are often difficult to detect visually and therefore often go undetected. Additionally, due to cost and testing limitations during the hatching process, hidden cracks are also frequently not discarded.

[0003] Currently, the main non-destructive testing methods for egg cracks at home and abroad are machine vision technology and acoustic technology. Machine vision is good at detecting the shape, color, blood spots and larger cracks of eggs, but it is not suitable for detecting very small eggshell cracks. In addition to the complexity of the algorithm and the high requirements for hardware, the main problems faced by machine vision methods in detecting egg cracks are: (1) After cracks appear in the egg, the protein inside the egg will fill the crack, making it difficult for machine vision to distinguish; (2) Impurities and stains on the surface of the egg that have not been cleaned properly will cover the cracks, or the appearance of the stains will be similar to the cracks, which will cause machine vision to misjudge; (3) The interval acquisition method of machine vision images cannot guarantee the acquisition of full information of the egg image; (4) Since the surface of the egg is ellipsoidal, it is difficult for industrial cameras to identify cracks at the blunt and blunt ends of the egg when the focal length is fixed.

[0004] In existing technologies, the acoustic impact response method for detecting cracked eggs has been practically applied abroad, and many large-scale poultry egg testing and grading equipment manufacturers use this method. The basic principle of the acoustic impact response method is to strike the eggshell with another object. Because the stiffness and damping of the eggshell near the crack differ from that of an intact egg, the vibration mode produced by the eggshell near the crack after being subjected to impact is also different. Therefore, collecting the sound signal emitted by the vibration and analyzing it in the time and frequency domains can be used to determine whether the eggshell has a crack. However, this method obtains the sound signal through multiple strikes, which has many drawbacks. Controlling the striking force is difficult due to the varying sizes and shapes of poultry eggs in actual production. At present, there is an urgent need to design a non-destructive testing method and device for detecting cracked eggs to solve the above-mentioned technical problems, hence this invention. Summary of the Invention

[0005] This application provides an online acoustic detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array, to solve the problems in the prior art: 1) relying on mechanical structures for active tapping excitation, resulting in complex structure, low efficiency, and high maintenance costs of the detection device; 2) when performing multi-point detection on poultry eggs, the change in the poultry egg's pose or the movement of the sensor leads to inconsistent sound path between the sound wave acquisition mechanism and the excitation point, thereby affecting the detection accuracy and latent crack detection rate.

[0006] In a first aspect, embodiments of this application provide an online acoustic detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array, the device comprising: An active excitation sound-generating mechanism is configured to drive the egg to roll and collide with the corrugated array mechanism to generate sound waves. It includes an egg detection channel and an egg pushing mechanism. The egg pushing mechanism is located on one side of the egg detection channel and can slide along a first direction of the egg detection channel. The egg detection channel is provided with a corrugated array mechanism that contacts and collides with the egg to generate sound waves. The sound wave acquisition mechanism is configured to acquire the sound waves excited by the egg and the corrugated array mechanism. The egg is placed between the sound wave acquisition mechanism and the egg pushing mechanism. The sound wave acquisition mechanism moves synchronously with the egg pushing mechanism along the first direction of the egg detection channel. The signal processing device is configured to receive the acoustic wave information collected by the acoustic wave acquisition mechanism, and to detect and determine whether there are cracks on the surface of the poultry egg based on the collected acoustic wave information.

[0007] Secondly, embodiments of this application provide an online acoustic nondestructive testing method for egg cracks based on active excitation of a continuous corrugated array, the method comprising the following steps: (S1) Based on the length of the corrugated array mechanism in the first direction, the egg is pushed to roll at a preset speed, and the sound waves excited by the egg and the corrugated array mechanism within several cycles are collected. (S2) Convert the sound wave information into an electrical signal, and analyze the difference in the output signal of the sound sensor to determine whether there are cracks in the eggshell of the poultry egg, and obtain the crack detection results and the corresponding crack location of the poultry egg.

[0008] Thirdly, this application provides an online acoustic detection device for hidden cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array, which is used for non-destructive testing of cracks in poultry eggs.

[0009] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the non-destructive testing method.

[0010] Fifthly, embodiments of this application provide a computer device, including: Memory, used to store instructions; A processor for executing the instructions to enable the device to implement the non-destructive testing method.

[0011] This invention utilizes the sound waves generated by the collision of a rolling egg with a corrugated array mechanism. These sound waves are collected by a sound acquisition mechanism that moves with the rolling egg. The differences in the collected sound wave signals are analyzed to determine whether there are hidden cracks in the eggshell, thus obtaining the detection results and the location of the hidden cracks. Because this method uses a sound acquisition mechanism that follows the rolling egg to capture sound wave signals, the sound path between the excitation point and the sound acquisition mechanism is stable and controllable. The captured sound wave signals are stable and do not fluctuate drastically due to the different positions of the egg, thereby improving the accuracy and detection rate of hidden cracks. Furthermore, this scheme uses the active excitation of sound by the egg and the corrugated array mechanism. The sound acquisition mechanism collects the excitation sound waves as the egg rolls, simulating the production and transportation process of eggs, closely resembling the actual production and transportation process of eggs. This invention adopts a following method for the sound wave acquisition mechanism, controlling the distance between the egg-rolling mechanism and the corrugated array mechanism to be constant. This enables the detection of tiny hidden cracks on the eggshell surface on both the sharp and blunt ends of the egg, improving the detection rate of hidden cracks in eggs and avoiding false judgments. In practical applications, it demonstrates strong adaptability and can be used for egg quality testing and grading. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the acoustic online non-destructive testing device for hidden cracks on the surface of poultry eggs according to an embodiment of this application; Figure 2 This is another structural schematic diagram of the acoustic online non-destructive testing device for hidden cracks on the surface of poultry eggs according to an embodiment of this application; Figure 3 This is another structural schematic diagram of the acoustic online non-destructive testing device for hidden cracks on the surface of poultry eggs according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of an online acoustic non-destructive testing device for hidden cracks on the surface of poultry eggs, according to another embodiment of this application. Figure 5 This is another structural schematic diagram of an online acoustic non-destructive testing device for hidden cracks on the surface of poultry eggs according to another embodiment of this application; Figure 6 This is another structural schematic diagram of an online acoustic non-destructive testing device for hidden cracks on the surface of poultry eggs according to another embodiment of this application; Figure 7 This is a schematic diagram of the structure of the poultry egg detection channel of the non-destructive testing device according to an embodiment of this application; Figure 8 This is a schematic diagram of the corrugated array mechanism of the non-destructive testing device according to an embodiment of this application; Figure 9 This is another structural schematic diagram of the corrugated array mechanism of the non-destructive testing device according to an embodiment of this application; Figure 10 This is another structural schematic diagram of the corrugated array mechanism of the non-destructive testing device according to an embodiment of this application; Figure 11 This is another structural schematic diagram of the corrugated array mechanism of the non-destructive testing device according to an embodiment of this application; Figure 12 This is a schematic diagram of the corrugated array mechanism of a non-destructive testing device according to another embodiment of this application; Figure 13 This is a schematic diagram illustrating the principle of the two-dimensional structure of a poultry egg according to an embodiment of this application; Figure 14 This is a schematic diagram illustrating the principle of contact and collision excitation between poultry eggs and the corrugated array mechanism of the non-destructive testing device in an embodiment of this application. Figure 15 This is a schematic diagram of the structure of the egg-pushing mechanism and the sound wave acquisition mechanism of the non-destructive testing device according to an embodiment of this application; Figure 16This is another structural schematic diagram of the poultry egg pushing mechanism and the sound wave acquisition mechanism of the non-destructive testing device according to an embodiment of this application; Figure 17 This is another structural schematic diagram of the poultry egg pushing mechanism and the sound wave acquisition mechanism of the non-destructive testing device according to the embodiments of this application; Figure 18 The time-domain diagram shows the acoustic spectrum of an intact egg obtained by the non-destructive testing device in this application for testing poultry eggs.

[0015] Figure 19 The time-domain diagram shows the acoustic spectrum of a cracked egg obtained by the non-destructive testing device in this application for testing poultry eggs.

[0016] Figure 20 This is a frequency domain comparison diagram of intact eggs and cracked eggs obtained by the non-destructive testing device in this application embodiment when testing poultry eggs. Detailed Implementation

[0017] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0018] In existing technologies, online detection of cracks in poultry eggs involves striking the eggshell online with a striking device, acquiring the sound signal through a microphone, and then analyzing its spectrum to detect cracks. To improve the crack detection rate, it is usually necessary to strike multiple locations on the eggshell, striking as much of the eggshell surface as possible. Furthermore, it is necessary to control the magnitude and speed of the striking force. An additional detection device is used to first measure the size of the egg to control the appropriate striking force. This inevitably leads to a complex striking mechanism, and its control method requires comprehensive consideration of many factors, affecting the achievement of a higher crack detection rate.

[0019] like Figures 1-3 As shown, this embodiment of the invention provides an online acoustic detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array. Figure 1 Combination Figures 2-6As shown, the device includes: an active excitation sound-generating mechanism 2, configured to push the egg to roll and collide with the corrugated array mechanism 3 to generate sound waves, including an egg detection channel 21 and an egg pushing mechanism 22. The egg pushing mechanism 22 is located on one side of the egg detection channel 21 and can slide along the first direction DR1 of the egg detection channel 21. The corrugated array mechanism 3 is arranged inside the egg detection channel 21 to generate sound waves by contacting and colliding with the egg; a sound wave acquisition mechanism 4, configured to acquire the sound waves generated by the egg and the corrugated array mechanism 3. The egg is placed between the sound wave acquisition mechanism 4 and the egg pushing mechanism 22. The sound wave acquisition mechanism 4 moves synchronously with the egg pushing mechanism 22 along the first direction DR1 of the egg detection channel 21; and a signal processing device (not shown), configured to receive the sound wave information acquired by the sound wave acquisition mechanism 4 and detect and determine whether there are cracks on the surface of the egg 1 based on the acquired sound wave information. This device generates sound waves by pushing the egg to roll and collide with the corrugated array mechanism 3. A sound acquisition mechanism that slides along with the rolling egg continuously collects these sound waves. Changes in the sound wave signal are used to determine the presence and location of cracks in the egg. This device simulates the real-world egg production and transportation process, exhibiting a high detection rate and accuracy for egg cracks, avoiding false positives. It demonstrates strong adaptability in practical applications and can be used for egg quality testing and grading.

[0020] In the preferred technical solution of the present invention, such as Figure 1 Combination Figures 2-6 As shown, the system also includes a support frame 5, with the active excitation sound-generating mechanism 2, the sound wave acquisition mechanism 4, and the signal processing equipment mounted on the support frame 5. The support frame 5 includes a frame, within which the active excitation sound-generating mechanism 2 and the sound wave acquisition mechanism 4 are arranged. The signal processing equipment can be located outside the frame. Soundproof walls or doors can be installed on various surfaces of the frame to isolate external environmental noise, preventing external environmental noise from affecting the detection of egg cracks and making the crack detection more sensitive.

[0021] It should be noted that, as stated in this article, Figure 1 and Figure 2 As shown, the transmission direction (length direction) of the egg-pushing mechanism 22 is the first direction DR1 (the first direction has a horizontal inclination angle A1 with the horizontal direction), the height direction of the egg-pushing mechanism 22 is the second direction DR2, and the width direction of the egg-pushing mechanism 22 is the third direction DR3, which is the normal direction of the plane defined by the first direction DR1 and the second direction DR2. The directions indicated by the first to third directions DR1, DR2, and DR3 described in this specification are relative concepts and can be changed to other directions. The active excitation sound-generating mechanism 2, the sound wave acquisition mechanism 4, and the signal processing device will be specifically described below with reference to these directions: Actively incentivize voice-making organizations like Figure 2 , 3 As shown in Figure 4, the active excitation sound-generating mechanism 2 of the present invention includes an egg detection channel 21 and an egg pushing mechanism 22. The egg pushing mechanism 22 is used to push the egg 1 to roll within the egg detection channel 21, so that it contacts and collides with the corrugated array mechanism 3, thereby generating sound waves. It should be noted that, in this invention, through the design of the corrugated array mechanism 3 and the design of the rolling speed and rolling angle, the magnitude of the collision force can be controlled between 15N and 25N. When the collision force is greater than 30N, the collision will damage the egg; if the collision force is less than 10N, the generated sound signal is weak and difficult to identify. Preferably, the magnitude of the collision force can be controlled at 15N, 16N, 17N, 18N, 19N, 20N, 21N, 22N, 23N, 24N, and 25N. These collision forces can also be adjusted by setting the horizontal tilt angle.

[0022] In the preferred technical solution of the present invention, such as Figure 4 and Figure 5 As shown, the egg-pushing mechanism 22 is configured to push the egg to roll on the egg detection channel 21, so that the egg comes into contact with the corrugated array mechanism 3 and generates sound waves. The egg-pushing mechanism 22 includes a push plate 23 and a transmission mechanism mounted on the support frame 5. The transmission mechanism is provided with a transmission slide rail 24 and a transmission motor 25 that drives the slider 26 on the transmission slide rail 24 to slide. The transmission slide rail 24 is arranged parallel to the egg detection channel 21. One side of the push plate 23 is fixed to the slider 26, and the other end is provided with a push block 231 that contacts the egg. The push block 231 slides along the first direction driven by the transmission motor 25, pushing the egg 1 to roll on the egg detection channel 21. The present invention pushes the egg 1 to roll in the egg detection channel 21 by the egg-pushing mechanism 22, so that the egg keeps rolling in the first direction, which facilitates the egg to come into contact with the corrugated array mechanism 3 successively during its own rolling cycle and generate sound waves, thereby realizing the detection of cracks in various parts of the egg 1. By utilizing the three-dimensional shape of the egg 1, the egg pushing mechanism 22 pushes the egg to roll within the egg detection channel 21, which can avoid repeated crack detection of the same contact area of ​​the egg.

[0023] In the specific technical solution of this invention, such as Figure 6As shown, the egg detection channel 21 extends along a first direction on the support frame 5. The egg detection channel 21 includes a first preset section 211, a detection section 212, and a second preset section 213. The detection section 212 is located between the first preset section 211 and the second preset section 213. A corrugated array mechanism 3 is embedded in the detection section 212 of the egg detection channel 21. The egg does not collide with the first preset section 211 and the second preset section 213, yet it is excited to generate sound waves. At this time, the sound acquisition mechanism can collect environmental noise inside the frame for subsequent filtering and noise reduction. The egg detection channel 21 of this invention has a dedicated detection section 212. After the egg is pushed to roll by the egg pushing mechanism 22, it collides with the corrugated array mechanism 3 of the detection section 212 to generate sound waves. The difference in the sound wave signal is used to determine whether there are cracks on the surface of the egg.

[0024] In the specific technical solution of this invention, such as Figure 6 and Figure 7 As shown, a channel fixing seat 51 is fixedly installed on the support frame 5. The egg detection channel 21 is an egg conveying trough fixed on the channel fixing seat 51 and extending along the first direction. The lower end of the egg conveying trough is bolted to the channel fixing seat 51 through a protruding fixing plate 214. The egg conveying trough has a first preset section 211, a detection section 212 and a second preset section 213 along the first direction. The detection section 212 includes an embedding part 215 for accommodating the corrugated array mechanism 3. The embedding part 215 is provided with an embedding fixing hole that cooperates with the corrugated array mechanism 3. The corrugated array mechanism 3 of the present invention is fixed to the egg travel, and the length of the corrugated array mechanism 3 can be designed and determined according to the length of the detection section 212 in the first direction. According to the length of the corrugated array mechanism 3 and the position of entering the corrugated array mechanism 3, the contact parts that collide with the egg can be determined, thereby determining the specific excitation point for crack detection.

[0025] In the preferred technical solution of the present invention, such as Figures 8-12 As shown, the length of the corrugated array mechanism 3 in the first direction is at least greater than or equal to the minor axis circumference of the egg 1. When the minor axis circumference of the egg 1 is less than or equal to the length of the corrugated array mechanism 3 in the first direction, the egg can roll at least once on the corrugated array mechanism 3, thus completing the circumferential crack detection of the egg's minor axis. In a preferred embodiment, the length of the corrugated array mechanism 3 in the first direction is equal to one time the minor axis circumference of the egg 1. In a more preferred embodiment, the length of the corrugated array mechanism 3 in the first direction is equal to two times the minor axis circumference of the egg 1. Experiments have shown that when the minor axis circumference of the egg 1 is equal to 1 / 4 of the length of the corrugated array mechanism 3 in the first direction, four circumferential crack detections of the egg's minor axis can be completed, thus covering more surface area of ​​the egg 1 and achieving crack detection at more excitation points.

[0026] In the specific technical solution of this invention, such as Figure 9 , Figure 10 As shown, the corrugated array mechanism 3 includes a mounting part 31 and a continuous excitation part 32. The continuous excitation part 32 is disposed on the upper end of the mounting part 31 and has a plurality of excitation protrusions 33 that excite sound waves by contacting and colliding with the egg; wherein the distribution and extension direction of the plurality of excitation protrusions 33 is parallel to a first direction. Based on the number of excitation protrusions 33 and the rolling period of the egg, the number of contact collisions between the egg and the corrugated array mechanism 3 can be quickly determined, thus easily obtaining the location and number of sound waves generated by the active excitation of the egg, thereby obtaining the specific distribution location of the crack detection.

[0027] In the specific technical solution of this invention, such as Figure 11 , Figure 12 As shown, the continuous excitation section 32 is also provided with an inlet block 34 and an outlet block 35. An excitation protrusion 33 is disposed between the inlet block 34 and the outlet block 35. The upper end of the inlet block 34 has a first convex surface that guides the egg into the continuous excitation section 32. The height of the side of the first convex surface near the first preset segment 211 is approximately equal to the height of the first preset segment 211. The upper end of the outlet block 35 has a second convex surface that guides the egg out of the continuous excitation section 32. The height of the side of the second convex surface near the second preset segment 213 is approximately equal to the height of the second preset segment 213. The surfaces of the first preset segment 211, the second preset segment 213, and the detection segment 212 have different roughness. The surfaces of the first preset segment 211 and the second preset segment 213 are designed to facilitate rolling of the eggs. The detection segment 212 is equipped with a corrugated array mechanism 3, which has an uneven surface for excitation and sound generation. The present invention uses an inlet block 34 and an outlet block 35 to guide the eggs into and out of the corrugated array mechanism 3, which facilitates the excitation and sound generation test of the eggs and reduces the adverse effects of the different surfaces on the eggs before and after crack detection.

[0028] In the specific technical solution of this invention, the excitation teeth 33 of the continuous excitation section 32 extend sequentially from the guide block 34 to the exit block 35. The orthographic projection contour of the guide block 34, the excitation teeth 33, and the exit block 35 in the egg detection channel 21 is a first curve S1, which is a first line segment parallel to the first direction. The guide block 34, the excitation teeth 33, and the exit block 35 extend in the same direction, guiding the egg to be excited and produce sound. In the specific technical solution of this invention, the length of the first line segment is the circumference of n eggs along the minor axis, where n is a natural number. Based on the circumference along the minor axis and the length of the first line segment, the period of the egg rolling in the first direction can be determined, facilitating subsequent sound wave signal separation.

[0029] In the specific technical solution of this invention, such as Figure 12 , 13As shown in Figure 14, the excitation teeth 33 of the continuous excitation section 32 extend sequentially from the guide block 34 to the exit block 35. The orthographic projection contour of the guide block 34, the excitation teeth 33, and the exit block 35 on the third direction DR3 is the second curve S2. The curvature of the second curve S2 is less than the curvature of the egg in the semi-axial direction. The second curve S2 of the present invention is a specially designed curve. Through the design of the second curve, the egg rolls stably and continuously after contact collision excitation, and the collision force at the excitation point of contact collision can also be controlled within a preset threshold range.

[0030] In the specific technical solution of this invention, two continuous excitation units 32 are provided at the upper end of the mounting part 31, and the two continuous excitation units 32 are arranged symmetrically in mirror image along the center line of the mounting part 31. This invention uses two continuously excitation units 32 arranged symmetrically in mirror image to simultaneously collect acoustic information from both ends of the egg 1, thereby improving the efficiency of crack detection.

[0031] In the specific technical solution of the present invention, a first excitation part 321 and a second excitation part 322 are respectively arranged opposite to each other on the upper end of the mounting part 31; one of the first excitation part 321 and the second excitation part 322 is a continuous excitation part 32. The present invention uses the first excitation part 321 and the second excitation part 322 to differentiate the two ends of the egg 1, adapting to the characteristics of the sharp end and the blunt end of the egg 1, and also reducing the interference of acoustic information at both ends.

[0032] In the specific technical solution of the present invention, both the first excitation part 321 and the second excitation part 322 are continuous excitation parts 32; preferably, the first line segment of the first excitation part 321 and the first curve S1 of the second excitation part 322 are the same; in the specific technical solution of the present invention, both the first excitation part 321 and the second excitation part 322 are continuous excitation parts 32, and the second curve of the first excitation part 321 and the second curve of the second excitation part 322 are the same.

[0033] In the specific technical solution of this invention, such as Figure 14As shown, the second curve peaks of the excitation teeth 33 of the first excitation section 321 and the second curve peaks of the excitation teeth 33 of the second excitation section 322 correspond one-to-one, and the heights of the corresponding excitation teeth 33's second curve peaks are approximately equal. In a specific technical solution of the present invention, the second curve troughs of the excitation teeth 33 of the first excitation section 321 and the second curve troughs of the excitation teeth 33 of the second excitation section 322 correspond one-to-one, and the height difference of the corresponding excitation teeth 33's second curve troughs is 0 to 1 / 4 of the minor axis height. Because eggs have sharp and blunt ends, this invention designs the excitation teeth 33 of the first excitation part 321 and the excitation teeth 33 of the second excitation part 322. After the egg enters the corrugated array mechanism 3, the sharp end of the egg 1 is excited by the excitation teeth 33 of the first excitation part 321, and the blunt end of the egg 1 is excited by the excitation teeth 33 of the second excitation part 322. By designing the excitation teeth 33 of the first excitation part 321 and the second excitation part 322 separately, this ensures stable rolling of the egg during its movement in the corrugated array mechanism 3 and reduces the difference in sound waves between the excitation points at both ends. In the specific technical solution of this invention, the height difference between the highest level of the excitation teeth 33 of the first excitation part 321 and the lowest level of the excitation teeth 33 of the second excitation part 322 is 0 to 1 / 4 of a short axis. During the experiment, this effectively compensates for the problem of unstable rolling caused by the inconsistent curvature at the sharp and blunt ends.

[0034] In the specific technical solution of this invention, the first excitation part 321 is located on the sharp end side of the egg 1, and the second excitation part 322 is located on the blunt end side of the egg 1. The excitation protrusion 33 of the first excitation part 321 has a first contact position P1 that contacts the sharp end of the egg 1, and the excitation protrusion 33 of the second excitation part 322 has a second contact position N2 that contacts the blunt end of the egg 1. The height of the first contact position P1 is approximately equal to the height of the second contact position N2. Because the heights of the first excitation part 321 and the second excitation part 322 are approximately equal, the collision positions of the sharp end and the blunt end of the egg 1 are approximately at the same height, and the positions where sound waves are generated are also approximately the same. Therefore, the stability of the generated sound waves is better, the amplitude fluctuation range is smaller, and it is more sensitive to crack detection.

[0035] In the specific technical solution of the present invention, the first excitation part 321 and the second excitation part 322 of the corrugated array mechanism 3 are connected by a mounting part 31, which is provided with a mounting hole 311 corresponding to the embedding part 215. The embedding part 215 fixes the corrugated array mechanism 3 by means of an embedding fixing hole corresponding to the mounting hole 311. The corrugated array mechanism 3 is installed by means of an mounting hole 311 aligned with the embedding fixing hole. The mounting part 31 does not participate in the excitation and sound generation, and its main function is to fix the corrugated array mechanism 3.

[0036] In a preferred embodiment of the present invention, the first preset segment 211 and the second preset segment 213 are integrally formed. The first preset segment 211 or the second preset segment 213 includes a T-shaped groove formed by the connection of the first groove 216 and the second groove 217. The bottom surface of the first groove 216 is at a similar height to the inlet block 34 and the outlet block 35; the bottom surface of the second groove 217 is at a lower height than the bottom surface of the first groove 216. The present invention provides a second groove 217 and a first groove 216. The first groove 216 restricts the movement of the egg 1 along its long axis, facilitating the egg-pushing mechanism 22 to push the egg to roll within the egg detection channel 21. The second groove 217 allows the egg-pushing mechanism 22 to slide in the first direction, pushing the egg to roll.

[0037] In the specific technical solution of this invention, the width of the groove opening of the second groove 217 is approximately equal to the width between the first excitation part 321 and the second excitation part 322 of the corrugated array mechanism 3. This facilitates the egg pushing mechanism 22 in pushing the egg to continue rolling as it passes through the corrugated array mechanism 3 in the egg detection channel 21, keeping the egg in the same state during the rolling process and preventing the long axis of the egg from deflecting during movement.

[0038] In the specific technical solution of this invention, the egg detection channel 21 has a preset horizontal inclination angle A1, which is set within the range of 0-5°; specifically, the horizontal inclination angle A1 is set to 0°, 1°, 2°, 3°, 4°, or 5°. When the horizontal inclination angle of the egg detection channel 21 changes from a first angle (e.g., 0°) to a second angle (e.g., 5°), the first contact position P1, which contacts the sharp end of the same egg, changes from a first position to a second position, and the second contact position N2, which contacts the blunt end of the same egg, changes from a third position to a fourth position (where the first and second positions are different; the third and fourth positions are different). The preset horizontal inclination angle of the egg detection channel 21 can be set by setting an inclination angle adjustment plate 52 on one side of the support frame 5. The inclination angle adjustment plate 52 is fixedly installed on the support frame 5 according to the preset inclination angle. By setting the egg detection channel 21 to have a preset horizontal inclination angle, the direction and speed of egg rolling can be effectively controlled, improving the stability of egg rolling.

[0039] The detection device of this invention is applicable to the detection of common poultry eggs. These poultry eggs are a general term for eggs from domestic poultry and edible birds; specifically, eggs can be chicken eggs, duck eggs, quail eggs, goose eggs, ostrich eggs, or their processed products, but are not limited to these. Typical poultry eggs mainly include more than ten types, such as chicken eggs, duck eggs, goose eggs, quail eggs, and pigeon eggs. They are rich in protein, amino acids, and minerals such as calcium and zinc. Chicken eggs have a protein utilization rate of over 98%, duck eggs are cooling in nature and have the effect of nourishing yin and moisturizing dryness, goose eggs have the highest lecithin content, and quail eggs are the richest in vitamin B2.

[0040] like Figure 13 As shown, common poultry eggs have an acute end A and an obtuse end B. Assuming that the major axis of egg 1 is in the x-axis direction, the minor axis of egg 1 is in the y-axis direction, its major axis radius is a, its minor axis radius is b, and its egg shape angle is θ, then the outer contour curve of egg 1 can be described in a two-dimensional plane by the following deformed ellipse equation: .

[0041] like Figure 14 As shown, in terms of structural morphology, a poultry egg has a clearly defined major axis a and minor axis b, and can be considered to be centrally symmetrical in the direction of the major axis. Therefore, assuming that from the first contact point P1 that collides with the sharp end of the poultry egg to the first contact point P2 of the next contact collision, based on the circumferential arc length in the direction of the minor axis between P1 and P2 and the rolling distance of the poultry egg from the first contact point P1 that collides with the sharp end of the poultry egg to the first contact point P2 of the next contact collision, the continuous excitation part 32 of the corrugated array mechanism 3 designed in this invention can continuously detect the crack detection position on the surface of the poultry egg.

[0042] The sound wave acquisition mechanism consists of 4 parts. In the specific technical solution of this invention, such as Figure 15 As shown, the acoustic wave acquisition mechanism 4 is positioned relative to the egg 1, with a fixed relative distance between them. Specifically, the acoustic wave acquisition mechanism 4 is positioned relative to the egg pushing mechanism 22, with a fixed relative distance between them. By fixing the relative distance between the acoustic wave acquisition mechanism 4 and the egg pushing mechanism 22, the excitation distance between the egg and the corrugated array mechanism 3 during the rolling process remains relatively stable. The acoustic wave information data acquired by the acoustic wave acquisition mechanism 4 is reliable and continuous, and the threshold value of its acoustic wave information is relatively controllable and stable, making it less likely for abnormal acoustic wave information to affect the detection of egg cracks. The sound path is the unidirectional path length from the excitation point to the sound sensor of the acoustic acquisition mechanism. In this invention, by fixing the relative distance between the acoustic wave acquisition mechanism 4 and the excitation point where the egg contacts and collides with the corrugated array mechanism, the amplitude and waveform of the excitation acoustic wave for normal eggshell quality are generally stable, while the excitation acoustic wave generation for micro-cracks shows significant differences, with a significantly smaller amplitude. This is beneficial for detecting the location of surface cracks. Therefore, this invention has a good detection rate.

[0043] In the specific technical solution of this invention, such as Figure 16 and Figure 17As shown, the sound wave acquisition mechanism 4 includes a sound wave acquisition mounting frame 41 fixed to the slider 26. A sound acquisition device is mounted on the sound wave acquisition mounting frame 41, and the position of the sound sensor of the sound acquisition device is relative to the position of the egg 1. The sound acquisition device can be a pickup, microphone, or other sound pickup device. A sound pickup device is a device used to collect ambient sound. It usually consists of a microphone and an audio amplification circuit, used to transmit the sound signal to the back-end equipment for processing. In this application, the sound pickup device can be an independent microphone, which can be a wired or wireless microphone, such as an omnidirectional microphone, a directional microphone, or a professional microphone; it can also be a terminal device equipped with a microphone, which is a device with wireless communication function, such as a mobile phone, tablet computer, laptop computer, PDA, etc.; or it can be an earphone or earbud equipped with a microphone.

[0044] In this invention, the relative distance between the push block 231 and the acoustic wave acquisition mounting frame 41 in the first direction is fixed. The acoustic wave acquisition mounting frame 41 is integrally formed with the push plate 23. The acoustic wave acquisition mounting frame 41 is equipped with an inclined mounting bracket 42, within which a sound acquisition device is mounted. The height of the sound sensor of the sound acquisition device is horizontally located at half the height of the egg 1 when it is placed horizontally. When the sound acquisition device is mounted on the inclined mounting bracket, the angle between the axis of the sound acquisition device and the first direction is within the range of 30°-80°. Through the design of the inclined mounting bracket 42, the sound acquisition device can be accurately aligned with the excitation sound-emitting part, which is beneficial for stable acquisition of acoustic wave information.

[0045] In a specific technical solution of this invention, the distance between the excitation teeth 33 of two adjacent first excitation parts 321 in the first direction is a first distance; the distance between the excitation teeth 33 of two adjacent second excitation parts 322 in the first direction is a second distance. In a specific technical solution, the first distance can be equal to the second distance. In a specific technical solution of this invention, the distance between the sound sensor of the sound collector and the egg in the first direction is less than or equal to the first distance or the second distance; or greater than or equal to half of the first distance or half of the second distance. Controlling the distance between the sound sensor and the egg in the first direction allows the sound wave information to be controlled within a preset threshold range, enabling faster sound wave information processing in subsequent signal processing, thus facilitating efficient output of egg crack detection results.

[0046] In the specific technical solution of this invention, a tilt angle adjustment plate 52 is provided on one side of the support frame 5. The tilt angle adjustment plate 52 is fixedly installed on the support frame 5 according to a preset tilt angle. The tilt angle can be 0°-5°. The setting of the tilt angle adjustment plate 52 can control the rolling of the egg 1, so that the long axis of the egg 1 does not deflect.

[0047] Signal processing equipment section The signal processing device of this invention may include a signal conditioning circuit, an analog-to-digital conversion circuit, and a computer device. The signal conditioning circuit has signal amplification and filtering functions, including a multi-channel charge amplification circuit, a multi-channel audio amplification circuit, and an anti-aliasing filter circuit. The anti-aliasing filter circuit may employ a Bessel low-pass filter with a cutoff frequency of 10kHz. The analog-to-digital conversion circuit is used to convert analog signals into digital signals. The computer device is used for data processing and may be a computer-based system or a system based on an embedded processor (DSP, ARM, etc.) for real-time data acquisition and processing. In addition, some other conventional auxiliary components are required in the specific implementation process, such as photoelectric switches for locating poultry eggs and photoelectric encoders for speed measurement.

[0048] The computer device provided by this invention includes: a memory for storing instructions; and a processor for executing the instructions to enable the device to implement the aforementioned non-destructive testing method. The computer device provided by this invention can be an electronic device such as a personal computer (PC), server device, mobile device, and embedded device. This electronic device models a model based on information provided by other components in the system. The electronic device may include a processor, RAM, neural network chip, memory, sensors, and communication modules. It may also include input / output modules, security modules, power control devices, etc. The processor can control the overall operation of the electronic device. The processor may include one processor core (single-core) or multiple processor cores (multi-core). The processor can process or execute programs and / or data stored in the memory. In some example embodiments, the processor can control the function of the neural network chip by executing programs stored in the memory. The processor can be implemented as a CPU, GPU, AP, etc. In the computer device of this invention, the CPU can be an ARM microcontroller.

[0049] The memory can include random access memory (RAM) (such as dynamic random access memory (DRAM) and static random access memory (SRAM)), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM, Blu-ray or other optical disc storage devices, hard disk drive (HDD), solid-state drive (SSD), or flash memory. This device can analyze input data in real time to extract useful information, and based on the extracted information, realize fully automated fruit product quality evaluation model modeling. The memory is a storage location used to store data and can store the operating system (OS), various programs, and various types of data.

[0050] Sensors can collect peripheral information about electronic devices on which electronic components are mounted. Sensors can sense or receive signals (e.g., video signals, audio signals, magnetic signals, biosignals, touch signals, etc.) from outside the electronic device and convert the sensed or received signals into data. For example, sensors can include at least one of various types of sensing devices, such as microphones, imaging devices, image sensors, light detection and ranging (LIDAR) sensors, ultrasonic sensors, infrared sensors, biosensors, and touch sensors.

[0051] The communication module can be equipped with various wired or wireless interfaces capable of communicating with external devices. For example, the communication module may include interfaces capable of accessing wired local area networks (LANs), variable WLANs (such as Wi-Fi), wireless personal area networks (WPANs) (such as Bluetooth), wireless universal serial buses (wireless USB), Zigbee, near field communication (NFC), radio frequency identification (RFID), power line communication (PLC), or mobile cellular networks (such as 3G, 4G, and LTE). The data interface of this invention can connect to various detection sensors to acquire spectral information collected by the sensors. These data interfaces can be transmission interfaces conforming to various data transmission protocols, such as USB interfaces, RS232 interfaces, etc.

[0052] In the technical solution of this invention, such as Figure 3 As shown, in specific implementation of the present invention, the specific steps are as follows: First, the device is activated, and the poultry egg is placed in the poultry egg detection channel 21, allowing it to pass sequentially through the first preset section 211, the detection section 212, and the second preset section 213. The sound wave acquisition mechanism 4 can sequentially acquire the sound wave information of the poultry egg as it passes through the corresponding first preset section 211, detection section 212, and second preset section 213, and convert the sound wave signal into an electrical signal. Since environmental noise outside the support frame 5 may interfere with the crack detection of the poultry egg 1, the environment outside the support frame 5 can be soundproofed to ensure the accuracy of the data. Therefore, maintaining a stable measurement environment is crucial for reducing systematic errors in the sound acquisition process. The present invention can detect sound wave information within a preset soundproof wall, and the acquired sound wave results are stable, accurate, and fast.

[0053] When performing online acoustic nondestructive testing of egg cracks based on active excitation of a continuous ripple array, the method includes the following steps: (S1) Based on the length of the corrugated array mechanism 3 in the first direction, the egg is pushed to roll at a preset speed, and the sound waves excited by the egg and the corrugated array mechanism 3 within a number of cycles are collected. (S2) Convert the sound wave information into an electrical signal, and analyze the difference in the output signal of the sound sensor to determine whether there is a crack in the eggshell of egg 1, and obtain the crack detection result and the corresponding crack location of egg 1.

[0054] This invention utilizes acoustic wave acquisition mechanism 4 and the egg at a relatively stable distance to obtain acoustic wave information. This allows for the acquisition of acoustic wave information between the relatively stable egg surface and the corrugated array mechanism 3. The acquired acoustic wave data primarily reflects the crack condition at the collision site. Through continuous rolling contact collisions, crack detection information at each collision site within the rolling cycle can be comprehensively obtained. This acoustic wave information allows for overall surface quality assessment of the egg 1, resulting in more objective and reliable detection results. Furthermore, the design of the corrugated array mechanism 3 ensures that the impact area covers most of the egg 1, leading to a more objective crack detection rate and significantly improved detection accuracy.

[0055] The computer device in this application embodiment may include a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the aforementioned non-destructive testing method. The computer program instructions can be formed into a program file and stored in the aforementioned computer-readable storage medium as a software product, enabling a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods in the various embodiments of this application. The aforementioned computer-readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, or terminal devices such as computers, servers, mobile phones, and tablets. Therefore, this invention can provide an application of an online acoustic detection device for latent cracks on the surface of poultry eggs based on continuous corrugated array active excitation in the non-destructive testing of egg cracks.

[0056] When conducting crack detection, an egg is used as the test object, and the following specific steps are followed: (S11) Connect the acoustic wave acquisition mechanism 4 to the computer equipment, and make the acoustic wave acquisition mechanism 4 and the poultry egg pushing mechanism 22 in the system run for a period of time to reach a stable state, so as to ensure the stable operating environment of the detection device.

[0057] (S12) The background sound wave information inside the device is collected using the sound wave acquisition mechanism 4 under the conditions of no poultry eggs and poultry eggs 1.

[0058] (S13) The poultry egg is loaded into the device and passes through the first preset section 211, the detection section 212 and the second preset section 213 in sequence. The sound wave acquisition mechanism 4 can collect the sound wave information of the poultry egg as it passes through the corresponding first preset section 211, detection section 212 and second preset section 213 in sequence, and transmit the received sound wave information to the signal processing device.

[0059] (S14) The signal processing equipment converts the sound wave information into an electrical signal, and performs amplification, filtering, and segmentation processing on the sound wave information. The signal processing equipment determines the rolling period of the egg based on the length of the corrugated array mechanism 3 in the first direction, determines the number of contact collisions based on the rolling speed of the egg 1, and segments the continuous sound signal into multiple segment sound signals corresponding to the number of contact collisions. (S15) The signal processing equipment determines whether the egg has cracks and the location of the cracks based on the sound wave information. The signal processing equipment performs time-domain and frequency-domain analysis (FFT) and feature extraction on each segment of the sound signal in sequence (time domain: zero-crossing rate, decay time, root mean square value, variance, etc.; FFT frequency domain: total energy, spectral variance, formant position and peak value, spectral centroid, band energy, band energy ratio, etc.), establishes a crack discrimination model based on the differences in the characteristics of the segmented sound signals, and uses the crack discrimination model to detect eggshell cracks, realizing adaptive online eggshell crack detection.

[0060] In this embodiment of the invention, eggs are used as the detection object. Before testing, a batch of training samples need to be tested in advance to establish a crack discrimination model of excitation sound signal under different rolling speeds.

[0061] First, 300 eggs were purchased as training samples. 100 intact eggs were selected using manual identification and labeling methods, while the remaining 200 eggs were artificially cracked. Then, following the hardware configuration and crack detection steps of the embodiment, the eggs were pushed by a drive motor, colliding with the corrugated array mechanism to obtain continuous sound wave information. The sound waves were then segmented into five signal segments. Through time-domain and frequency-domain feature extraction, 20 sets of feature parameter vectors were obtained. In the embodiment, the corrugated array consists of two columns, thus generating five signal segments. Through time-domain and frequency-domain feature extraction, 20 sets of feature parameter vectors are obtained. Each feature parameter vector set contains the following feature parameters (time domain: zero-crossing rate, decay time, root mean square value, variance, etc.; frequency domain: energy, spectral variance, formant position and peak value, spectral centroid, band energy, band energy ratio, etc.). The pushing speed of the eggs was controlled by the drive motor, establishing a crack discrimination model under different pushing speeds. Finally, the eggs to be tested are placed in the poultry egg detection channel, and 20 sets of feature parameter vectors are obtained according to steps S11~S15. The established model is used to comprehensively determine whether the poultry eggs have cracks.

[0062] Figure 18 This is a time-domain diagram of the acoustic information spectrum of an intact egg obtained by the non-destructive testing device in this application embodiment during egg testing. Because the present invention uses a sound acquisition mechanism that slides along with the rolling of the egg to continuously collect sound waves, the amplitude of the acoustic information of the intact egg is stable in the time domain, which is better than the scheme without a sound acquisition mechanism that slides along with the rolling of the egg. Figure 19 This is a time-domain waveform diagram of the acoustic information spectrum of a cracked egg obtained by the non-destructive testing device in this application when testing poultry eggs. It can be seen that the sound segment signal generated by the crack is significantly different from the sound segment signal generated by the intact eggshell. Due to the presence of the crack, the amplitude of the sound generated by the crack in the time domain is significantly smaller than the amplitude of the sound signal generated by the intact egg. Figure 20 This image shows a frequency domain comparison of intact and cracked eggs obtained during poultry egg testing using the non-destructive testing device described in this application. It is clearly visible that the sound signal produced by the cracked egg is significantly different from that produced by the intact egg.

[0063] In the various embodiments of the present invention, the functional units can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0064] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted through a computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An apparatus for on-line acoustic detection of latent cracks on the surface of an egg based on active excitation of a continuous wave array, characterized in that, The device includes: An active excitation sound-generating mechanism is configured to drive the egg to roll and collide with the corrugated array mechanism to generate sound waves. It includes an egg detection channel and an egg pushing mechanism. The egg pushing mechanism is located on one side of the egg detection channel and can slide along a first direction of the egg detection channel. The egg detection channel is provided with a corrugated array mechanism that contacts and collides with the egg to generate sound waves. The sound wave acquisition mechanism is configured to acquire the sound waves excited by the egg and the corrugated array mechanism. The egg is placed between the sound wave acquisition mechanism and the egg pushing mechanism. The sound wave acquisition mechanism moves synchronously with the egg pushing mechanism along the first direction of the egg detection channel. The signal processing device is configured to receive the acoustic wave information collected by the acoustic wave acquisition mechanism, and to detect and determine whether there are cracks on the surface of the poultry egg based on the collected acoustic wave information.

2. The acoustic online detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array according to claim 1, characterized in that, The device also includes a support frame, and the poultry egg detection channel is laid and extended along a first direction on the support frame. The poultry egg detection channel includes a first preset section, a detection section and a second preset section. The detection section is disposed between the first preset section and the second preset section, and the corrugated array mechanism is embedded in the detection section of the poultry egg detection channel. Preferably, the length of the corrugated array mechanism in the first direction is at least greater than or equal to the minor axis circumference of the egg; preferably, the length of the corrugated array mechanism in the first direction is equal to one minor axis circumference of the egg; preferably, the length of the corrugated array mechanism in the first direction is equal to two minor axis circumferences of the egg. Preferably, the corrugated array mechanism includes a mounting part and a continuous excitation part, wherein the continuous excitation part is disposed at the upper end of the mounting part and has a plurality of excitation protrusions that contact and collide with the egg to excite sound waves; wherein the distribution and extension direction of the plurality of excitation protrusions is parallel to the first direction. Preferably, the continuous excitation section is further provided with an inlet block and an outlet block, the excitation protrusion is disposed between the inlet block and the outlet block, the upper end of the inlet block has a first convex surface that guides the egg into the continuous excitation section, and the height of the side of the first convex surface near the first preset segment is equivalent to the height of the first preset segment; the upper end of the outlet block has a second convex surface that guides the egg out of the continuous excitation section, and the height of the side of the second convex surface near the second preset segment is equivalent to the height of the second preset segment; Preferably, the excitation protrusions of the continuous excitation section extend sequentially from the inlet block to the outlet block, and the orthographic projection contours of the inlet block, the excitation protrusions, and the outlet block in the egg detection channel are a first curve, and the first curve is a first line segment parallel to the first direction. Preferably, the length of the first line segment is the circumference of n eggs along the minor axis, where n is a natural number; Preferably, the excitation teeth of the continuous excitation section extend sequentially from the inlet block to the outlet block, and the orthographic projection contours of the inlet block, the excitation teeth, and the outlet block in the second direction are a second curve; the curvature of the second curve is less than the curvature of the egg in the semi-axial direction. Preferably, the upper end of the mounting part is provided with two continuous excitation parts, and the two continuous excitation parts are arranged symmetrically in mirror image along the center line of the mounting part; Preferably, the upper end of the mounting portion is provided with a first excitation portion and a second excitation portion disposed opposite to each other; one of the first excitation portion and the second excitation portion is the continuous excitation portion; Preferably, both the first excitation part and the second excitation part are continuous excitation parts; preferably, the first line segment of the first excitation part and the first curve of the second excitation part are the same; Preferably, both the first excitation section and the second excitation section are continuous excitation sections, and the second curve of the first excitation section and the second curve of the second excitation section are the same; Preferably, the second curve peaks of the excitation protrusions of the first excitation part and the second curve peaks of the excitation protrusions of the second excitation part correspond one-to-one, and the heights of the second curve peaks of the corresponding excitation protrusions are equivalent. Preferably, the second curve trough of the excitation protrusion of the first excitation part and the second curve trough of the excitation protrusion of the second excitation part correspond one-to-one, and the height difference of the second curve trough of the corresponding excitation protrusion is 0 to 1 / 4 of the short axis height.

3. The acoustic online detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array according to claim 1, characterized in that, The first excitation part is located on the sharp end side of the egg, and the second excitation part is located on the blunt end side of the egg. The excitation teeth of the first excitation part have a first contact position that contacts the sharp end of the egg, and the excitation teeth of the second excitation part have a second contact position that contacts the blunt end of the egg. The height of the first contact position is approximately equal to the height of the second contact position. Preferably, the egg detection channel has a preset horizontal tilt angle, which is set within the range of 0-5°. When the horizontal tilt angle of the egg detection channel is switched from the first angle to the second angle, the first contact position that contacts the sharp end of the same egg is switched from the first position to the second position, and the second contact position that contacts the blunt end of the same egg is switched from the third position to the fourth position.

4. The acoustic online detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array according to claim 1, characterized in that, The egg-pushing mechanism is configured to push the egg to roll on the egg detection channel, so that the egg comes into contact with the corrugated array mechanism and excites sound waves; the egg-pushing mechanism includes a push plate and a transmission mechanism mounted on the support frame. The transmission mechanism is provided with a transmission slide rail and a transmission motor that drives the slider on the transmission slide rail to slide. The transmission slide rail is arranged parallel to the egg detection channel. One side of the push plate is fixed to the slider, and the other end is provided with a push block that contacts the egg. The push block slides along a first direction as driven by the transmission motor, pushing the egg to roll on the egg detection channel. Preferably, a channel fixing seat is fixedly installed on the support frame, and the poultry egg detection channel is a poultry egg conveying trough fixed on the channel fixing seat and extending along the first direction. The lower end of the poultry egg conveying trough is bolted to the channel fixing seat through a protruding fixing plate. The poultry egg conveying trough has a first preset section, a detection section and a second preset section inside along the first direction. The detection section includes an embedding part that accommodates the corrugated array mechanism. The embedding part is provided with an embedding fixing hole that cooperates with the corrugated array mechanism. The corrugated array mechanism has a mounting section between the first excitation section and the second excitation section, and the mounting section is provided with mounting holes corresponding to the embedding section; the embedding section fixes the corrugated array mechanism through the embedding fixing holes corresponding to the mounting holes. The first preset segment and the second preset segment are integrally formed. The first preset segment or the second preset segment includes a T-shaped groove formed by the connection of the first groove and the second groove. The bottom surface of the first groove is at the same height level as the inlet block and the outlet block. The bottom surface of the second groove is at a lower height level than the bottom surface of the first groove. Preferably, the width of the slot opening of the second groove is equivalent to the width between the first excitation part and the second excitation part of the corrugated array mechanism.

5. The acoustic online detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array according to claim 1, characterized in that, The sound wave acquisition mechanism includes a sound wave acquisition frame fixed to the slider, a sound acquisition device is mounted on the sound wave acquisition frame, and the position of the sound sensor of the sound acquisition device is set relative to the position of the poultry egg. Preferably, the relative distance between the pushing block and the acoustic wave acquisition fixture is fixed in the first direction; Preferably, the acoustic wave acquisition fixing frame is integrally formed with the push plate, and the acoustic wave acquisition fixing frame is provided with an inclined mounting frame, in which a sound acquisition device is mounted; the height of the sound sensor of the sound acquisition device is horizontally located at half the height of the egg when it is placed horizontally. Preferably, the distance between the excitation protrusions of two adjacent first excitation parts in the first direction is a first distance; the distance between the excitation protrusions of two adjacent second excitation parts in the first direction is a second distance. Preferably, the distance between the sound sensor of the sound collector and the egg in the first direction is less than or equal to a first distance or a second distance; or greater than or equal to half of the first distance or half of the second distance.

6. The acoustic online detection device for latent cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array according to claim 1, characterized in that, A tilt angle adjustment plate is provided on one side of the support frame, and the tilt angle adjustment plate is fixedly installed on the support frame according to a preset tilt angle.

7. An online non-destructive method for detecting cracks in eggs based on active excitation of a continuous wave array, characterized in that, The method includes the following steps: (S1) Based on the length of the corrugated array mechanism in the first direction, the egg is pushed to roll at a preset speed, and the sound waves excited by the egg and the corrugated array mechanism within several cycles are collected. (S2) Convert the sound wave information into an electrical signal, and analyze the difference in the output signal of the sound sensor to determine whether there are cracks in the eggshell of the poultry egg, and obtain the crack detection results and the corresponding crack location of the poultry egg.

8. The application of the acoustic online detection device for hidden cracks on the surface of poultry eggs based on active excitation of a continuous corrugated array as described in claims 1 to 6 in the non-destructive testing of cracks in poultry eggs.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. When the computer program is executed by the processor, it implements the non-destructive testing method according to any one of claims 7.

10. A computer device, comprising: Memory, used to store instructions; A processor for executing the instructions to enable the device to implement the nondestructive testing method according to any one of claims 7.

Images