Acoustic online detection device and nondestructive detection method for hidden cracks on surfaces of poultry eggs based on helical ripple multi-dimensional excitation

Abstract

The invention relates to an acoustic online detection device and nondestructive detection method for hidden cracks on the surface of an egg based on helical ripple multi-dimensional excitation, and the device comprises an excitation sound production mechanism which is configured to push the egg to contact and collide so as to excite and generate sound waves, comprising a poultry egg pushing mechanism used for pushing poultry eggs to roll and a corrugated array mechanism used for making contact and colliding with the poultry eggs, the poultry egg pushing mechanism pushes the poultry eggs to make contact and collide with the corrugated array mechanism, and an included angle is formed between the direction of the contact track of the corrugated array mechanism and the poultry eggs and the moving direction of the poultry eggs; the sound wave collection mechanism is configured to collect sound waves excited by the poultry eggs and the ripple array 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. The device can perform recessive crack detection on the three-dimensional surface of the eggshell of the poultry egg, the distribution of excitation points shows a remarkable spatio-temporal evolution characteristic, and along with the increase of a rolling period, contact points dynamically migrate and expand towards two poles (sharp ends and blunt ends) of the poultry egg along a spiral track, so that the detection accuracy is improved. The method fundamentally relieves the problem of detection blind areas caused by limited areas for detecting the hidden cracks, so that the hidden cracks on the surfaces of eggshells on the two sides of the sharp end and the blunt end of the poultry egg can be detected, the detection rate of poultry egg crack detection is improved, misjudgment is avoided, and the method shows relatively high adaptability in the actual application process and is suitable for popularization and application. The method can be used for egg quality detection and grade evaluation.

Description

TECHNICAL FIELD

[0002] The application belongs to the technical field of non-destructive testing of egg cracks, and particularly relates to an egg surface hidden crack acoustic online detection device based on spiral wave multi-dimensional excitation and a non-destructive testing method. BACKGROUND

[0003] Egg quality detection is an important step in the production process of eggs. The presence of egg cracks will reduce the strength of the eggshell, making it easy to break, which is not conducive to the collection, transportation, packaging and storage of eggs. In addition, pathogenic bacteria can more easily enter the egg body through the cracks, shorten the preservation period of the eggs, and even infect the consumers. Egg cracks are divided into complete cracks and hidden cracks, among which hidden cracks are chicken eggs with complete outer layer of eggshell but with fine cracks in the bone layer. Such cracks are not easy to be detected by the naked eye, but may cause egg liquid to seep out or bacteria to invade due to vibration or pressure during transportation or storage. Hidden crack eggs, or dark crack eggs, are not easy to be detected by the naked eye, and complete cracks mean that the shell and shell membrane have been broken. In the production process, completely broken eggs are usually eliminated, but hidden cracks are often difficult to be detected by the naked eye due to their small size, and therefore are often not screened out. In addition, due to the cost and detection means in the process of incubating the eggs, hidden cracks are often not eliminated.

[0004] At present, the non-destructive detection methods for egg cracks at home and abroad mainly include 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 cracks in the eggshell. In addition to the complexity of the algorithm and the high requirements for hardware, the main problems of the machine vision method in detecting egg cracks are: (1) the internal egg white will fill the crack site after the egg cracks, which is difficult for machine vision to distinguish; (2) impurities and stains on the egg surface covering the cracks, or the appearance of the stains similar to the cracks, etc. may cause misjudgment of machine vision; (3) the interval collection method of machine vision images cannot guarantee the full information collection of egg images; (4) due to the ellipsoidal shape of the egg surface, it is difficult for the industrial camera to identify the cracks at the blunt end and the sharp end of the egg under the condition of fixed focal length.

[0005] In the prior art, the acoustic impact response method for detecting cracks in eggs has been practically applied abroad, and many large egg detection and grading equipment manufacturers use this method. The basic principle of the acoustic impact response method is to hit the eggshell with another object. Since the stiffness and damping of the eggshell near the crack are different from those of the intact eggshell, the vibration mode of the eggshell near the crack after being impacted by the force is also different. Therefore, collecting the sound signals emitted by the vibration and analyzing them in the time domain and frequency domain can be used to determine whether the eggshell has cracks. However, this method acquires sound signals through multiple hits, which has many disadvantages. The control of the hitting force is difficult due to the different sizes and shapes of eggs in actual production. At the present stage, there is an urgent need to design a non-destructive testing method and system for detecting hidden cracks in eggs to solve the above technical problems, and the present application is thus proposed. SUMMARY

[0006] The embodiments of the present application provide an egg surface hidden crack acoustic online detection device based on spiral corrugated multi-dimensional excitation to solve the problems in the prior art that 1) the detection system has a complex structure, low efficiency and high maintenance cost due to the dependence on mechanical structure for active hitting excitation; and 2) when multiple points of the egg are detected, the distribution positions of the excitation points are relatively concentrated, and the trajectory of the excitation points is single, thereby affecting the detection accuracy and the detection rate of hidden cracks.

[0007] In a first aspect, the embodiments of the present application provide an egg surface hidden crack acoustic online detection device based on spiral corrugated multi-dimensional excitation, which comprises: An excitation sound generating mechanism configured to push the egg to contact and collide to generate sound waves, comprising an egg pushing mechanism for pushing the egg to roll and a corrugated array mechanism for contacting and colliding with the egg, the egg pushing mechanism pushes the egg to contact and collide with the corrugated array mechanism, and the contact trajectory of the corrugated array mechanism with the egg has an included angle with the moving direction of the egg; A sound wave collecting mechanism configured to collect the sound waves excited by the egg and the corrugated array mechanism; A signal processing device configured to receive the sound wave information collected by the sound wave collecting mechanism and detect whether the surface of the egg has cracks according to the collected sound wave information.

[0008] In a second aspect, the embodiments of the present application provide an egg surface hidden crack acoustic online non-destructive detection method based on spiral corrugated multi-dimensional excitation, which comprises the following steps: (S1) According to the length of the corrugated array mechanism in the first direction, the egg is rolled at a preset speed, and the sound waves excited by the contact and collision of the egg and the corrugated array mechanism in several rolling periods are collected and acquired; (S2) converting the sound wave information into electrical signals, and judging whether the eggshell of the egg has cracks according to the difference of the sound sensor output signals to obtain the crack detection result of the egg and the corresponding crack position.

[0009] In a third aspect, the application provides application of the device for detecting the latent cracks on the surface of the egg based on the spiral wave crests in the multi-dimensional excitation in the non-destructive detection of the latent cracks on the egg.

[0010] In a fourth aspect, the application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the non-destructive detection method.

[0011] In a fifth aspect, the application provides a computer device, which comprises: a memory for storing instructions; a processor for executing the instructions to enable the device to implement the non-destructive detection method.

[0012] The technical scheme of the application utilizes the sound waves generated by the collision between the egg and the wave crest array mechanism during the rolling process, and through the moving direction of the egg and the special design of the wave crest array mechanism, the excitation points of the contact collision can be distributed on the three-dimensional surface of the egg, and the distribution positions can cover the entire surface, and the excitation points of the surface have a gradual evolution in time and space. Specifically, the scheme generates sound waves by pushing the egg to roll and contact the wave crest array mechanism 3. Since the contact trajectory of the wave crest array mechanism 3 and the egg has an angle with the moving direction of the egg 1, the excitation points of the contact collision can be distributed on the entire surface of the egg, and the entire surface of the egg can be detected for latent cracks, and the distribution of the excitation points presents a significant time-space evolution characteristic. With the increase of the rolling period, the contact points are no longer limited to the equator, but dynamically migrate and expand along the spiral trajectory to the two poles (sharp end and blunt end) of the egg. This design converts one-dimensional rolling collision into two-dimensional curved surface scanning, which fundamentally alleviates the problem of limited detection blind area in crack detection. The scheme can detect the small latent cracks on the eggshell surface on both sides of the sharp end and the blunt end of the egg, improve the detection rate of the egg crack detection, avoid misjudgment, and have strong adaptability in actual application, and can be used for egg quality detection and grade evaluation. The application also uses a sound collecting mechanism to collect the sound waves while the egg is rolling, the excitation sound waves have small amplitude fluctuations, and the sound waves can be judged according to the difference of the sound waves collected by the sound collecting mechanism to determine whether the eggshell of the egg has cracks, so as to obtain the crack detection result of the egg and the corresponding crack position. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows, and other drawings can be obtained by those of ordinary skill in the art without any creative effort on the premise that the drawings are not creative.

[0014] Figure 1 A structural schematic diagram of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 2 Another structural schematic diagram of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 3 Another structural schematic diagram of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 4 A structural schematic diagram of the acoustic online detection device for the latent crack on the surface of the poultry egg according to another embodiment of the present application; Figure 5 Another structural schematic diagram of the acoustic online detection device for the latent crack on the surface of the poultry egg according to another embodiment of the present application; Figure 6 Another structural schematic diagram of the acoustic online detection device for the latent crack on the surface of the poultry egg according to another embodiment of the present application; Figure 7 A structural schematic diagram of the detection channel of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 8 A structural schematic diagram of the corrugated array mechanism of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 9 Another structural schematic diagram of the corrugated array mechanism of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 10 Another structural schematic diagram of the corrugated array mechanism of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 11 Another structural schematic diagram of the corrugated array mechanism of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 12 A structural schematic diagram of the corrugated array mechanism of the acoustic online detection device for the latent crack on the surface of the poultry egg according to another embodiment of the present application; Figure 13 A principle schematic diagram of the two-dimensional structure of the poultry egg according to the embodiment of the present application; Figure 14 A structural schematic diagram of the egg pushing mechanism and the sound wave collecting mechanism of the acoustic online detection device for the latent crack on the surface of the poultry egg according to the embodiment of the present application; Figure 15The structure schematic diagram of the corrugated array mechanism of the on-line acoustic detection device for the hidden crack on the surface of the egg of the comparative example of the present application; Figure 16 The contact point distribution diagram of the surface of the egg when the comparative example of the present application is used to detect the crack; Figure 17 The contact point distribution diagram of the surface of the egg when the comparative example of the present application is used to detect the crack; Figure 18 The time-domain waveform schematic diagram of the sound wave information spectrum obtained when the comparative example of the present application is used to detect the crack, wherein A is a cracked egg and B is a sound egg; Figure 19 The frequency domain comparison effect diagram of the sound egg and the cracked egg obtained when the comparative example of the present application is used to detect the crack. DETAILED DESCRIPTION

[0015] The features and exemplary embodiments of various aspects of the present application will be described in detail below, in order to make the purposes, technical solutions and advantages of the present application more clear and apparent, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, but not to limit the present application. The present application can be implemented without some of these specific details by those skilled in the art. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0016] In the prior art, the on-line detection method of the crack of the egg is to knock the eggshell by a knocking device, to obtain the knocking sound signal by a pickup, and then to analyze the frequency spectrum to detect the crack. In order to improve the crack detection rate, it is usually necessary to knock the eggshell at multiple positions, to knock the entire eggshell surface as much as possible, in addition, it is necessary to control the size of the knocking force and the knocking speed, and to detect the size of the egg 1 by an additional detection device to control the appropriate knocking force. These inevitably lead to the complex structure of the knocking mechanism, and the control method needs to consider many factors, which affects the higher crack detection rate.

[0017] As shown in Figures 1-6 The present application provides an on-line acoustic detection device for the hidden crack on the surface of the egg based on the spiral corrugated multi-dimensional excitation. As shown in Figure 1 In combination with Figures 2-6As shown, the device comprises: an excitation sound generating mechanism 2 configured to push the egg to contact and collide to excite sound waves, including an egg pushing mechanism 22 for pushing the egg to roll and a corrugated array mechanism 3 for contact and collision with the egg, the egg pushing mechanism 22 pushes the egg 1 to contact and collide with the corrugated array mechanism 3, and the contact trajectory of the corrugated array mechanism 3 with the egg has an included angle with the moving direction of the egg 1; a sound wave collecting mechanism 4 configured to collect the sound waves generated by the collision of the egg with the corrugated array mechanism 3; a signal processing device (not shown) configured to receive the sound wave information collected by the sound wave collecting mechanism 4, and detect and determine whether there is a crack on the surface of the egg 1 according to the collected sound wave information. The device excites sound waves by pushing the egg to roll and contact and collide with the corrugated array mechanism 3. Since the contact trajectory of the corrugated array mechanism 3 with the egg has an included angle with the moving direction of the egg 1, the excitation points of the contact and collision can be distributed throughout the surface of the egg, the entire egg can be cracked, and the distribution of the contact excitation points presents significant space-time evolution characteristics. With the increase of the rolling period, the contact points are no longer limited to the equator, but dynamically migrate and expand along the spiral trajectory to the two poles (large end and small end) of the egg. This design converts one-dimensional rolling collision into two-dimensional curved surface scanning, which fundamentally alleviates the problem of limited area and blind area in crack detection.

[0018] In the preferred technical solution of the present application, as shown in Figure 1 In combination with Figures 2-6 As shown, the device further comprises a support frame 5 and an egg detection channel 21 provided on the support frame, the egg detection channel 21 extends along a first direction DR1 on the support frame, the egg pushing mechanism 22 is provided on one side of the egg detection channel 21 and can slide along the first direction DR1 of the egg detection channel, and the corrugated array mechanism 3 for exciting sound waves by contact and collision with the egg is fixed in the egg detection channel; the excitation sound generating mechanism 2, the sound wave collecting mechanism 4 and the signal processing device are installed and arranged on the support frame 5. The egg is arranged between the sound wave collecting mechanism 4 and the egg pushing mechanism 22, and the sound wave collecting mechanism 4 moves synchronously with the egg pushing mechanism 22 along the first direction DR1 of the egg detection channel 21. The sound collecting mechanism slides continuously collects sound waves following the rolling of the egg, and judges whether there is a crack in the egg and the position of the crack according to the change of the sound wave signal. The device simulates the egg production and transportation process in the real environment, has high detection rate and detection accuracy of egg crack detection, avoids misjudgment, and has strong adaptability in actual application, and can be used for egg quality detection and grade evaluation.

[0019] In the preferred technical solution of the present application, the support frame 5 comprises a frame body, the excitation sound generating mechanism 2 and the sound wave collecting mechanism 4 are arranged in the frame body, the signal processing device can be arranged outside the frame body, and each surface of the frame body can be provided with sound insulation walls or sound insulation doors for preventing the influence of external environmental noise on the crack detection of the eggs.

[0020] In the preferred technical solution of the present application, as shown in Figure 4 , and as shown in Figure 9 , the moving direction (for example, the rolling displacement direction) of the egg 1 is parallel to the first direction; the first included angle A2 between the contact trajectory of the corrugated array mechanism 3 and the egg 1 and the first direction is greater than 0° and less than 180°; in the preferred technical solution, the first included angle A2 between the contact trajectory of the corrugated array mechanism 3 and the egg 1 and the first direction is greater than 0° and less than 90° or greater than 90° and less than 180°. By designing the contact trajectory of the corrugated array mechanism 3 and the egg 1 at an angle with the first direction, the contact points can be gradually distributed to various positions of the egg during the contact and collision excitation, and are not limited to the equator on both sides, thereby expanding the crack detection points of the egg and having good adaptability.

[0021] It should be noted that, in the description herein, as shown in Figure 1 and Figure 2 , the transmission direction (length direction) of the egg pushing mechanism 22 is the first direction DR1 (the first direction has a horizontal inclination angle 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 the present description are relative concepts and can be changed to other directions. The excitation sound generating mechanism 2, the sound wave collecting mechanism 4 and the signal processing device are specifically described below with reference to these directions: Excitation sound generating mechanism part As shown in Figure 2 , 3 , 4, the excitation sound generating mechanism 2 of the present application comprises 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 in the egg detection channel 21 to make contact and collision with the corrugated array mechanism 3 to generate sound waves. It should be noted that, in the present application, by designing the corrugated array mechanism 3 and the rolling speed and rolling angle, the size of the collision force can be controlled to be between 15N and 25N. When the size of the collision force is greater than 30N, the collision will cause damage to the egg. If the collision force is less than 10N, the sound signal generated is weak and is not convenient for signal identification.

[0022] In the preferred technical solution of the present application, as shown in Figure 4 and Figure 5 The egg pushing mechanism 22 is configured to push the egg to roll on the egg detection channel 21 to make the egg collide with the corrugated array mechanism 3 to excite the sound wave; the egg pushing mechanism 22 comprises a pushing plate 23 and a transmission mechanism installed on the support frame 5, the transmission mechanism is provided with a transmission slide rail 24 and a transmission motor 25 driving the sliding block 26 on the transmission slide rail 24, the transmission slide rail 24 is arranged in parallel with the egg detection channel 21, one side of the pushing plate 23 is fixed with the sliding block 26, and the other end is provided with a pushing block 231 in contact with the egg, and the pushing block 231 slides in the first direction to push the egg 1 to roll on the egg detection channel 21 driven by the transmission motor 25. The egg pushing mechanism 22 pushes the egg 1 to roll in the egg detection channel 21, so that the egg keeps rolling in the first direction, which facilitates the egg to collide with the corrugated array mechanism 3 to excite the sound wave in the rolling cycle of the egg itself, thereby realizing the crack detection of each contact position of the egg 1. By utilizing the three-dimensional shape of the egg 1, the egg pushing mechanism 22 pushes the egg to roll in the egg detection channel 21, which can avoid repeated crack detection of the same position of the egg.

[0023] In the specific technical solution of the present application, as shown in Figure 6 The egg detection channel 21 is laid and extended in the first direction on the support frame 5, the egg detection channel 21 comprises a first preset section 211, a detection section 212 and a second preset section 213, the detection section 212 is arranged between the first preset section 211 and the second preset section 213, and the corrugated array mechanism 3 is embedded in the detection section 212 of the egg detection channel 21. The egg does not collide to excite the sound wave in the first preset section 211 and the second preset section 213, at which time the sound collecting mechanism can collect the environmental noise inside the frame for subsequent filtering and denoising. The egg detection channel 21 of the present application is provided with a special detection section 212, which collides with the corrugated array mechanism 3 of the detection section 212 to emit the sound wave after the egg is pushed to roll by the egg pushing mechanism 22, and the difference change of the sound wave signal is used to determine whether there is a crack on the surface of the egg.

[0024] In the specific technical solution of the present application, as shown in Figure 6 and Figure 7As shown, the support frame 5 is fixedly installed with a channel fixing seat 51, the egg detection channel 21 is an egg conveying groove fixed on the channel fixing seat 51 and extending in the first direction, and the lower end of the egg conveying groove is fixedly connected with the channel fixing seat 51 through a protruding fixing plate 214 by bolting. The inside of the egg conveying groove 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 embedded part 215 accommodating the corrugated array mechanism 3, and the embedded part 215 is provided with an embedded fixing hole matched with the corrugated array mechanism 3. The corrugated array mechanism 3 of the present application is fixed with the egg running through, and the length of the corrugated array mechanism 3 can be determined according to the length of the detection section 212 in the first direction, so as to determine the position of collision with the egg.

[0025] In the preferred technical solution of the present application, as shown in the drawings, Figures 8-12 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 one circle on the corrugated array mechanism 3, so that the circumferential crack detection of the minor axis of the egg can be completed. In the preferred technical solution, the length of the corrugated array mechanism 3 in the first direction is equal to 1 times the minor axis circumference of the egg 1. In the more preferred technical solution, the length of the corrugated array mechanism 3 in the first direction is equal to 2 times the minor axis circumference of the egg 1. The length design of the corrugated array mechanism 3 in the first direction can realize the space-time evolution of the contact position of the egg, and the continuous rolling of the egg realizes multiple rolling periods. According to experiments, 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, 4 circumferential crack detections of the minor axis of the egg can be completed, so that more than 70% of the surface area of the egg 1 can be covered, and the fixed detection track in the prior art when using the knocking method for crack detection of the egg, and the difficulty in covering the position of crack detection to reach 30% of the surface area of the egg.

[0026] In the specific technical solution of the present application, as shown in the drawings, Figure 9 , Figure 10As shown in the drawings, the corrugated array mechanism 3 comprises a mounting portion 31 and a spiral excitation portion 32, which is arranged on the upper end of the mounting portion 31 and has a plurality of excitation protrusions 33 for exciting sound waves by contacting and colliding with the eggs; wherein the distribution extension direction of at least two of the excitation protrusions 33 has a second included angle with the first direction. In the technical scheme of the present application, when the distribution extension direction of the two excitation protrusions 33 is the same as the contact trajectory of the corrugated array mechanism and the egg, the first included angle can be the same as the second included angle. When the distribution extension direction of the two excitation protrusions 33 is different from the contact trajectory of the corrugated array mechanism and the egg, the degree of the second included angle can be less than or equal to the first included angle. Controlling the size of the first and second included angles can adjust the dispersion speed of the contact point. According to the number of excitation protrusions 33 and the period of egg rolling, the number of contact and collision excitation of the egg and the corrugated array mechanism 3 can be quickly judged, so that the position and number of sound waves generated by the active excitation of the egg are easily obtained, the separation of sound waves is facilitated, and good crack detection accuracy and specific crack position are obtained.

[0027] As shown in the drawings, Figure 11 、 Figure 12 The spiral excitation portion 32 is also provided with an import block 34 and an export block 35, and the excitation protrusions 33 are arranged between the import block 34 and the export block 35. The upper end of the import block 34 has a first convex surface for guiding the egg into the spiral excitation portion 32, and the height of the first convex surface close to one side of the first preset section 211 is equivalent to the height of the first preset section 211. The upper end of the export block 35 has a second convex surface for guiding the egg out of the spiral excitation portion 32, and the height of the second convex surface close to one side of the second preset section 213 is equivalent to the height of the second preset section 213. Because the surface roughness of the first preset section 211, the second preset section 213 and the detection section 212 is different, the surfaces of the first preset section 211 and the second preset section 213 are convenient for the egg to roll. The detection section 212 is provided with the corrugated array mechanism 3, and the surface thereof is a concave-convex surface for exciting sound. The import block 34 and the export block 35 are used to guide the egg into and out of the corrugated array mechanism 3, which facilitates the egg to excite sound for testing and reduces the adverse effects of different surfaces before and after crack detection.

[0028] In the specific technical scheme of the present application, the excitation teeth 33 of the spiral excitation part 32 extend from the guide-in block 34 to the guide-out block 35 in turn, and the guide-in block 34, the excitation teeth 33 and the guide-out block 35 have a first curve S1 in the orthographic projection profile of the egg detection channel 21. The guide-in block 34, the excitation teeth 33 and the guide-out block 35 extend in the same direction to guide the eggs to make exciting sound. In the specific technical scheme of the present application, the period of the first curve S1 is the circumference of n eggs in the short axis direction, and n is a natural number; and the m periods of the first curve S1 are the circumference of the eggs in the short axis direction, and m is a natural number. According to the circumference in the short axis direction and the period of the first curve S1, the rolling period of the eggs in the first direction can be determined, which facilitates subsequent separation of sound wave signals.

[0029] In the specific technical scheme of the present application, as shown in Figure 11 and 12 , the excitation teeth 33 of the spiral excitation part 32 extend from the guide-in block 34 to the guide-out block 35 in turn, and the guide-in block 34, the excitation teeth 33 and the guide-out block 35 have a second curve S2 in the orthographic projection profile in the third direction DR3; and the curvature of the second curve S2 is smaller than the curvature of the eggs in the half axis direction. The second curve S2 of the present application is a specially designed curve. Through the design of the second curve, the eggs can stably and continuously roll after the contact and collision excitation, and the contact force of the contact and collision excitation can also be controlled within the preset threshold force.

[0030] In the specific technical scheme of the present application, two spiral excitation parts 32 are arranged on the upper end of the mounting part 31, and the two spiral excitation parts 32 are arranged in mirror symmetry along the center line of the mounting part 31. The present application adopts the two spiral excitation parts 32 arranged in mirror symmetry, which facilitates processing and can simultaneously collect sound wave information of both ends of the egg 1, thereby improving the efficiency of crack detection.

[0031] In the specific technical scheme of the present application, the upper end of the mounting part 31 is provided with a first excitation part 321 and a second excitation part 322 arranged oppositely; and one of the first excitation part 321 and the second excitation part 322 is a spiral excitation part 32. The other can be a non-spiral excitation part, and the contact trajectory of the non-spiral excitation part is in the same direction as the rolling direction of the egg. The present application adopts the first excitation part 321 and the second excitation part 322 to distinguishably design the two ends of the egg 1, adapt to the characteristics of the sharp end and the blunt end of the egg 1, and can also reduce the interference of sound wave information of the two ends.

[0032] In the specific technical scheme of the present application, both the first excitation part 321 and the second excitation part 322 are spiral excitation parts 32; preferably, the first curve S1 of the first excitation part 321 and the first curve S1 of the second excitation part 322 are the same; and in the specific technical scheme of the present application, both the first excitation part 321 and the second excitation part 322 are spiral 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 the present application, as shown in the figure, Figure 11 In the specific technical solution of the present application, the second curve peaks of the excitation teeth 33 of the first excitation part 321 and the second curve peaks of the excitation teeth 33 of the second excitation part 322 correspond one-to-one, and the second curve peak heights of the corresponding excitation teeth 33 are equivalent. In the specific technical solution of the present application, the second curve valleys of the excitation teeth 33 of the first excitation part 321 and the second curve valleys of the excitation teeth 33 of the second excitation part 322 correspond one-to-one, and the height difference of the second curve valleys of the corresponding excitation teeth 33 is 0-1 / 4 of the short axis height. Since the poultry egg has a sharp end and a blunt end, the excitation teeth 33 of the first excitation part 321 and the excitation teeth 33 of the second excitation part 322 are designed, and after the poultry egg enters the corrugated array mechanism 3, the sharp end of the poultry egg 1 and the excitation teeth 33 of the first excitation part 321 are excited to produce sound, and the blunt end of the poultry egg 1 and the excitation teeth 33 of the second excitation part 322 are excited to produce sound. The excitation teeth 33 of the first excitation part 321 and the excitation teeth 33 of the second excitation part 322 are designed respectively to ensure that the poultry egg is relatively stable during rolling in the corrugated array mechanism 3. In the specific technical solution of the present application, 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 0-1 / 4 of the short axis, which reflects the problem of unstable rolling state caused by inconsistent curvature at the sharp end and the blunt end during the experiment.

[0034] In the specific technical solution of the present application, the first excitation part 321 is located on the sharp end side of the poultry egg 1, the second excitation part 322 is located on the blunt end side of the poultry egg 1, the excitation teeth 33 of the first excitation part 321 have a first contact position P1 that collides with the sharp end of the poultry egg 1, and the excitation teeth 33 of the second excitation part 322 have a second contact position that collides with the blunt end of the poultry egg 1; The height level of the first contact position P1 is roughly equivalent to the height level of the second contact position. By roughly equivalent height levels of the first excitation part 321 and the second excitation part 322, the positions where the sharp end of the poultry egg 1 and the blunt end of the poultry egg 1 collide are roughly the same height, and the positions where the sound waves are generated are also roughly the same, so the stability of the generated sound waves is better.

[0035] In the specific technical solution of the present application, the first excitation part 321 and the second excitation part 322 of the corrugated array mechanism 3 are a mounting part 31, the mounting part 31 is provided with a mounting hole 311 corresponding to the embedded part 215; the embedded part 215 fixes the corrugated array mechanism 3 through the embedded fixing hole corresponding to the mounting hole 311; the corrugated array mechanism 3 is installed in position through the mounting hole 311 and the embedded fixing hole, and the mounting part 31 does not participate in excitation and sound production, and its main function is to fix the corrugated array mechanism 3.

[0036] In the preferred scheme of the present application, the first preset section 211 and the second preset section 213 are integrally formed, the first preset section 211 or the second preset section 213 comprises a T-shaped groove formed by the communication of the first groove body 216 and the second groove body 217, the groove bottom surface of the first groove body 216 is at the same height level as the height of the introduction block 34 and the export block 35; the groove bottom surface of the second groove body 217 is at a lower height level than the groove bottom surface of the first groove body 216. The present application provides the second groove body 217 and the first groove body 216, the first groove body 216 limits the movement of the long axis direction of the eggs 1, and facilitates the egg pushing mechanism 22 to push the eggs to roll in the egg detection channel 21. The second groove body 217 can facilitate the egg pushing mechanism 22 to slide in the first direction and push the eggs to roll.

[0037] In the specific technical scheme of the present application, the width of the second groove body 217 is equivalent to the width between the first excitation part 321 and the second excitation part 322 of the corrugated array mechanism 3. In this way, the egg pushing mechanism 22 can continue to push the eggs to roll when the eggs pass through the corrugated array mechanism 3 in the egg detection channel 21, and the eggs can maintain the same state during rolling, avoiding the deflection of the long axis of the eggs during movement.

[0038] In the specific technical scheme of the present application, the egg detection channel 21 has a preset horizontal inclination A1, and the preset horizontal inclination A1 is in the range of 0-5°. When the horizontal inclination of the egg detection channel 21 is switched from a first angle such as 0° to a second angle such as 5°, the first contact position P1 colliding with the sharp end of the same egg is switched from a first position to a second position, and the second contact position colliding with the blunt end of the same egg is switched from a third position to a fourth position (wherein the first position and the second position are different; the third position and the fourth position are different). The preset horizontal inclination of the egg detection channel 21 can be set by setting an inclined angle adjusting plate 52 on one side of the support frame 5, and the inclined angle adjusting plate 52 is fixedly installed on the support frame 5 according to the preset inclined angle. By setting the preset horizontal inclination of the egg detection channel 21, the rolling direction and speed of the eggs can be effectively controlled, and the stability of the egg rolling can be improved.

[0039] The detection device of the present application can be applied to the detection of common eggs. These eggs are collectively referred to as egg classes of poultry and edible birds, specifically, the egg classes can be chicken eggs, duck eggs, quail eggs, goose eggs, ostrich eggs or their processed products, but are not limited to this. Typical eggs mainly include more than ten kinds of chicken eggs, duck eggs, goose eggs, quail eggs, pigeon eggs, etc. They are rich in protein, amino acids and minerals such as calcium and zinc, among which the utilization rate of chicken egg protein is more than 98%, duck eggs have the effect of nourishing yin and moistening dryness, goose eggs have the highest lecithin content, and quail eggs are the richest in vitamin B2.

[0040] As Figure 13As shown, the common egg has a sharp end A and a blunt end B, assuming that the long axis direction of the egg 1 is the x-axis direction, the short axis direction of the egg 1 is the y-axis direction, the long axis radius of the egg 1 is a, the short axis radius of the egg 1 is b, and the egg angle is θ, then the outer contour curve of the egg 1 can be described as a deformed ellipse equation in a two-dimensional plane as follows: .

[0041] As Figure 13 , and in combination Figure 11 As shown, in terms of structure, the egg has a clear long axis a and a short axis b, and can be considered to be center-symmetric in the long axis direction, so assuming that the first contact position P1P1 of the egg in contact with the sharp end of the egg to the next first contact position P2 of the contact collision, according to the circumferential arc length between P1 and P2 in the short axis direction and the rolling distance of the egg from the first contact position P1 of the egg in contact with the sharp end to the next first contact position P2 of the contact collision, the spiral excitation part 32 of the corrugated array mechanism 3 can continuously detect the crack detection position on the surface of the egg.

[0042] The sound wave collection mechanism 4 part In the specific technical scheme of the present application, as Figures 4-6 , and in combination Figure 14 As shown, the sound wave collection mechanism 4 is arranged opposite to the position of the egg 1, and the relative distance between the sound wave collection mechanism 4 and the egg 1 is fixed. Specifically, the sound wave collection mechanism 4 is arranged opposite to the position of the egg pushing mechanism 22, and the relative distance between the sound wave collection mechanism 4 and the egg pushing mechanism 22 is fixed. By fixing the relative distance between the sound wave collection mechanism 4 and the egg pushing mechanism 22, the excitation sound emitting distance of the egg to the corrugated array mechanism 3 is relatively stable during rolling, and the sound wave information data collected by the sound wave collection mechanism 4 is reliable and continuous, and the threshold size of the sound wave information is also relatively controllable and stable, and it is not easy to produce abnormal sound wave information to affect the detection of egg cracks.

[0043] In the specific technical scheme of the present application, the sound wave collection mechanism 4 includes a sound wave collection fixed frame 41 fixed with the sliding block 26, a sound collector is arranged on the sound wave collection fixed frame 41, and the position of the sound sensor of the sound collector is arranged opposite to the position of the egg 1. The sound collector can be a sound pickup device such as a pickup, a microphone, etc. The sound pickup device is a device used to collect the sound of the scene. It is usually composed of a microphone and an audio amplification circuit, and is used to transmit the sound signal to the back-end device for processing. In this application, the sound pickup device can be a separate microphone, a wired or wireless microphone, such as an omnidirectional microphone, a directional microphone or a professional microphone, etc.; or a terminal device equipped with a microphone, the terminal device is a device with wireless communication function, such as a mobile phone, a tablet computer, a notebook computer, a palm computer, etc.; or a headset and earplug equipped with a microphone.

[0044] In the specific technical solution of the present application, the relative distance of the pushing block 231 and the sound wave collection fixed frame 41 in the first direction is fixed. In the specific technical solution of the present application, the sound wave collection fixed frame 41 is integrally arranged with the pushing plate 23, the sound wave collection fixed frame 41 is provided with a diagonal mounting frame 42, and the sound collector is arranged in the diagonal mounting frame 42. The height level of the sound sensor of the sound collector is located at half of the height level of the poultry egg 1 when the poultry egg is horizontally placed. When the sound collector is arranged on the diagonal mounting plate, the included angle between the axis of the sound collector and the first direction is in the range of 30°-80°. Through the design of the diagonal mounting frame 42, the sound collector can be accurately aligned with the excitation sound generating part, which is beneficial to the stable collection of sound wave information.

[0045] In the specific technical solution of the present application, the distance of the excitation teeth 33 of two adjacent first excitation parts 321 in the first direction is a first distance, and the distance of the excitation teeth 33 of two adjacent second excitation parts 322 in the first direction is a second distance. In the specific technical solution, the first distance can be equal to the second distance. In the specific technical solution of the present application, the distance between the sound sensor of the sound collector and the poultry egg in the first direction is less than or equal to the first distance or the second distance, and 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 poultry egg in the first direction can control the sound wave information within a preset threshold range, and the sound wave information processing can be faster in the subsequent signal processing process, so as to efficiently output the poultry egg crack detection result.

[0046] In the specific technical solution of the present application, one side of the support frame 5 is provided with an inclination angle adjusting plate 52, and the inclination angle adjusting plate 52 is fixedly arranged on the support frame 5 according to a preset inclination angle. The inclination angle can be 0°-5°, and the arrangement of the inclination angle adjusting plate 52 can control the rolling of the poultry egg 1, so that the long axis direction of the poultry egg 1 does not deviate.

[0047] Signal processing device part The signal processing device can 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-confusion filtering circuit. The anti-confusion filtering circuit can adopt a Bessel low-pass filter with a cutoff frequency of 10 kHz. The analog-to-digital conversion circuit is used to convert analog signals into digital signals, and the computer device is used for data processing, which can be a computer-based system or an embedded processor (DSP, ARM, etc.) based system for real-time data acquisition and processing. In addition, some other conventional auxiliary elements are also needed in the specific implementation process, such as a photoelectric switch for poultry egg positioning and a photoelectric encoder for speed measurement.

[0048] The computer device provided by the present application comprises a memory for storing instructions and a processor for executing the instructions to enable the device to implement the nondestructive testing method described above. The computer device provided by the present application can be an electronic device such as a personal computer (PC), a server device, a mobile device, and an embedded device. Such an electronic device performs modeling according to information provided by other components in the system. The electronic device can include a processor, a RAM, a neural network chip, a memory, a sensor, and a communication module. It can also include an input / output module, a security module, a power control device, etc. The processor can control the overall operation of the electronic device. The processor can 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 functions of the neural network chip by executing programs stored in the memory. The processor can be implemented as a CPU, a GPU, an AP, etc. The CPU in the computer device of the present application can be mounted with 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), a CD-ROM, a Blu-ray or another optical disk storage device, a hard disk drive (HDD), a solid state drive (SSD), or a flash memory. The device can analyze input data in real time based on the system to extract valid information and implement a fully automated fruit product quality evaluation modeling based on the extracted information. The memory is a storage location for storing data and can store an operating system (OS), various programs, and various data.

[0050] The sensor can collect peripheral information of the electronic device on which the electronic device is mounted. The sensor can sense or receive a signal (e.g., a video signal, an audio signal, a magnetic signal, a biological signal, a touch signal, etc.) from the outside of the electronic device and convert the sensed or received signal into data. For example, the sensor can include at least one of various types of sensing devices such as a microphone, an imaging device, an image sensor, a light detection and ranging (LIDAR) sensor, an ultrasonic sensor, an infrared sensor, a biological sensor, and a touch sensor.

[0051] The communication module can be provided with various wired or wireless interfaces capable of communicating with external devices. For example, the communication module can include a communication interface capable of accessing a wired local area network (LAN), a wireless local area network (Variate WLAN) (such as wireless fidelity (Wi-Fi)), a wireless personal area network (WPAN) (such as Bluetooth), a wireless universal serial bus (wireless USB), Zigbee, near field communication (NFC), radio frequency identification (RFID), power line communication (PLC), or a mobile cellular network (such as third generation (3G), fourth generation (4G), and long term evolution (LTE)). The data interface of the present application can be connected with various detection sensors to obtain the spectral information collected by the detection sensors. These data interfaces can be transmission interfaces that comply with various data transmission protocols, such as USB interfaces, RS232 interfaces, and the like.

[0052] In the technical solution of the present application, as shown in Figure 3 As shown in the specific implementation of the present application, the specific steps are as follows: first, start the device, place the eggs in the egg detection channel 21, and make them pass through the first preset section 211, the detection section 212, and the second preset section 213 in turn. The sound wave collection mechanism 4 can collect the sound wave information of the eggs passing through the corresponding first preset section 211, detection section 212, and second preset section 213 in turn, and convert the sound wave signal into an electrical signal. Since the ambient noise outside the support frame 5 may interfere with the crack detection of the eggs 1, the outside of the support frame 5 can be soundproofed to ensure the accuracy of the data. Therefore, maintaining a stable measurement environment is crucial to reducing system errors during sound collection. The detection of sound wave information can be carried out in the preset soundproof wall, and the collected sound wave results are stable, accurate, and fast.

[0053] When performing acoustic online non-destructive detection of egg cracks, the following steps are included: (S1) According to the length of the wave array mechanism 3 in the first direction, push the eggs to roll at a preset speed, and collect the sound waves generated by the collision between the eggs and the wave array mechanism 3 within several cycles; (S2) Convert the sound wave information into an electrical signal, and analyze and determine whether the eggshell of the egg 1 has cracks according to the difference in the sound sensor output signal, to obtain the crack detection result and the corresponding crack position of the egg 1.

[0054] The sound wave information obtained by the sound wave acquisition mechanism 4 under the condition that the distance between the sound wave acquisition mechanism 4 and the egg is stable can obtain the sound wave information of the egg and the corrugated array mechanism 3, and the sound wave data obtained by the sound wave acquisition mechanism 4 mainly reflects the crack condition of the collision position. The crack detection information of each collision position of the egg in the rolling period can be obtained by the continuous rolling contact. The sound wave information obtained in this way can detect the surface quality of the egg 1 as a whole, and the detection result is more objective and reliable. Through the design of the corrugated array mechanism 3, the collision position covers most of the positions of the egg 1, the crack detection rate is more objective, and the detection accuracy is greatly improved.

[0055] The computer device of the embodiment of the present application can include a computer readable storage medium storing a computer program, and the computer program is executed by a processor to implement the nondestructive testing method described above. Wherein, the computer program instructions can form a program file in the form of a software product stored in the above computer readable storage medium, so that a computer device (which can be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the method of each embodiment of the present application. And the aforementioned computer readable storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc. Various media that can store program codes, or computer, server, mobile phone, tablet terminal device. Therefore, the present application can provide an application of the egg surface latent crack acoustic online detection device based on continuous corrugated array active excitation in the field of egg crack nondestructive testing.

[0056] In the specific crack detection, chicken eggs are used as the detection object, and the following specific steps are performed: (S11) Connect the sound wave acquisition mechanism 4 with the computer device, and make the sound wave acquisition mechanism 4 and the egg pushing mechanism 22 in the device run for a period of time to reach a stable state, and ensure that the running environment of the detection device is stable.

[0057] (S12) Use the sound wave acquisition mechanism 4 to collect the background sound wave information in the device under the condition that no egg is placed and the egg 1 is placed.

[0058] (S13) Put the egg into the device, and make it pass through the first preset section 211, the detection section 212 and the second preset section 213 in turn. The sound wave acquisition mechanism 4 can collect the sound wave information when the egg passes through the corresponding first preset section 211, detection section 212 and second preset section 213 in turn, and transmit the received sound wave information to the signal processing device.

[0059] (S14) The signal processing device converts the sound wave information into an electrical signal, and performs amplification and filtering, and segmentation processing on the sound wave information. The signal processing device determines the period of the egg rolling according to the length of the wave array mechanism 3 in the first direction, and determines the number of contact collisions according to the rolling speed of the egg 1, and divides the continuous sound signal into a plurality of segment sound signals corresponding to the number of contact collisions; (S15) The signal processing device determines whether the egg has a crack and the position of the crack according to the sound wave information. The signal processing device sequentially performs time domain and frequency domain analysis (FFT) and feature extraction (time domain: zero crossing rate, decay time, root mean square value, variance, etc.; FFT frequency domain: total energy, spectral variance, resonance peak position and peak value, spectral centroid, frequency band energy, frequency band energy ratio, etc.) on each segment sound signal, establishes a crack discrimination model based on the difference in characteristics of the segment sound signal, and detects the eggshell using the crack discrimination model to realize adaptive online eggshell crack detection.

[0060] The comparative example uses a wave array mechanism whose distribution extension direction of the excitation convex teeth 33 is parallel to the first direction, and its structure is as shown in Figure 15 The comparative example uses a wave array mechanism whose distribution extension direction of the excitation convex teeth 33 is parallel to the first direction, and its structure is as shown in

[0061]

[0062] From the above table and Figure 16 It can be seen that the contact point distribution of the comparative example shows a high degree of spatial limitation. Regardless of the increase in the rolling period (from period 1 to period 4), the collision points are always constrained on two fixed latitude strips near the equator of the egg. Increasing the rolling period only increases the collision density in this narrow area, but cannot expand a new detection area in the long axis direction of the egg (i.e. both ends). Therefore, the comparative example has the defect of a physical polarity detection blind area. The data of the comparative example quantitatively confirms its spatial limitation, and the effective coverage rate of the contact point position coverage area reaches 31.84% after period 1, but then increases extremely slowly, and only reaches 37.23% at period 6, indicating that its coverage ability quickly saturates at a low level. This shows that a large part (more than 60%) of the eggshell surface, especially the two end regions, is always in an uncovered (undetected) state.

[0063] And from Figure 17As can be seen from the above table, the contact point distribution of the embodiment of the present application presents significant space-time evolution characteristics. With the increase of the rolling period, the contact points are no longer limited to the equator, but dynamically migrate and expand along the spiral trajectory to the two poles (sharp end and blunt end) of the egg. The one-dimensional rolling collision is converted into two-dimensional curved surface scanning, which fundamentally alleviates the detection blind area problem of the two ends of the comparative example. The data of the embodiment of the present application presents efficient and continuous growth, and its effective coverage rate rapidly increases with the number of periods: 32.71% for period 1, 54.24% for period 2, and 68.79% for period 3. Although the growth rate slows down after period 3, showing diminishing marginal benefits, the total coverage rate can still continuously increase to 80.07% (period 6).

[0064] In contrast, the present application expands dynamic spiral scanning in the long and short axis directions at the same time by the contact trajectory of the corrugated array mechanism 3 and the egg 1 and the moving direction of the egg 1, which has an included angle, thereby achieving high spatial diversity and high coverage efficiency, continuously expanding the detection boundary with the increase of the number of detection periods, and particularly for the key areas of the two ends of the egg, showing significant superiority.

[0065] When using the present application scheme for specific detection, chicken eggs are taken as the detection object, and a batch of training sample tests need to be performed in advance before testing to establish a crack discrimination model of the excitation sound signal under different rolling speeds.

[0066] First, a batch of 300 eggs are selected as training samples, 100 intact eggs are selected by artificial recognition labeling method, and the other 200 eggs are artificially manufactured as cracked eggs. Then, according to the hardware configuration and crack detection steps of the embodiment, the eggs are pushed into contact with the corrugated array mechanism using a transmission motor, and continuous sound wave information is obtained. Then, the sound wave is divided into 5 segment signals, and 20 sets of feature parameter vector sets can be obtained through time domain and frequency domain feature extraction. The corrugated array of the embodiment is two columns, which can generate 5 segment signals, and 20 sets of feature parameter vector sets can be obtained through time domain and frequency domain feature extraction. 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, resonance peak position and peak value, spectral centroid, frequency band energy, frequency band energy ratio, etc.). The pushing speed of the eggs is controlled by the transmission motor, and a crack discrimination model under different pushing speeds is established. Finally, the egg to be tested is placed in the egg detection channel, and 20 sets of feature parameter vector sets are obtained according to the steps S11-S15, and the model is established to comprehensively judge whether the egg has a crack.

[0067] Figure 18Fig. 1 is a time-domain waveform diagram obtained by the nondestructive testing device of the embodiment of the present application when detecting eggs. A is a cracked egg, and B is a perfect egg. It can be seen that the sound fragment signal generated by the crack is obviously different from the sound fragment signal generated by the perfect egg. Due to the existence of the crack, the amplitude of the sound generated by the crack in the time domain is obviously smaller than the amplitude of the sound signal generated by the perfect egg. Figure 19 Fig. 2 is a frequency-domain comparison effect diagram of a perfect egg and a cracked egg obtained by the nondestructive testing device of the embodiment of the present application when detecting eggs. It can also be seen that the sound fragment signal generated by the cracked egg is obviously different from the sound fragment signal generated by the perfect egg.

[0068] The various functional units in the embodiments of the present application can be integrated in one processing module, or each unit can exist physically independently, or two or more units can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software functional module. When the integrated module is realized in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0069] In the above embodiments, all or part of the embodiments can be realized by software, hardware, firmware or any combination thereof. When realized by software, all or part of the embodiments can be realized in the form of a computer program product. The 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 processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted by 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 through a wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. containing one or more available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD) or a semiconductor medium (such as a solid state disk (SSD)) and the like.

[0070] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present disclosure.

Claims

1. A device for acoustic online detection of latent cracks on the surface of poultry eggs based on helical corrugation multidimensional excitation, characterized in that, The device comprises: The excitation sound generating mechanism is configured to push the eggs to contact and collide to excite sound waves, comprising an egg pushing mechanism for pushing the eggs to roll and a corrugated array mechanism for contacting and colliding with the eggs, the egg pushing mechanism pushes the eggs to contact and collide with the corrugated array mechanism, and the contact trajectory of the corrugated array mechanism with the eggs has an included angle with the moving direction of the eggs; The sound wave collecting mechanism is configured to collect the sound waves excited by the eggs and the corrugated array mechanism; The signal processing device is configured to receive the sound wave information collected by the sound wave collecting mechanism, and detect whether there is a crack on the surface of the egg according to the collected sound wave information.

2. The device for detecting the hidden cracks on the surface of the egg based on the multi-dimensional excitation of the spiral corrugated wave according to claim 1, wherein The device further comprises a support frame and an egg detection channel arranged on the support frame, the egg detection channel extends along a first direction on the support frame, the egg pushing mechanism is arranged on one side of the egg detection channel and can slide along the first direction of the egg detection channel, and the corrugated array mechanism for exciting sound waves by contacting and colliding with the eggs is fixed in the egg detection channel; Preferably, the moving direction of the eggs is parallel to the first direction, the contact trajectory of the corrugated array mechanism with the eggs has a first included angle with the first direction, and the range of the first included angle is greater than 0° and less than 180°; preferably, the contact trajectory of the corrugated array mechanism with the eggs has a first included angle with the first direction, and the range of the first included angle is greater than 0° and less than 90° or greater than 90° and less than 180°; Preferably, the egg detection channel comprises a first preset section, a detection section and a second preset section, the detection section is arranged between the first preset section and the second preset section, and the corrugated array mechanism is fixedly embedded in the detection section of the egg detection channel; Preferably, the length of the corrugated array mechanism in the first direction is at least equal to the short axis circumference of the egg; preferably, the length of the corrugated array mechanism in the first direction is equal to 1 times the short axis circumference of the egg; preferably, the length of the corrugated array mechanism in the first direction is equal to 2 times the short axis circumference of the egg; Preferably, the corrugated array mechanism comprises a mounting portion and a spiral excitation portion, the spiral excitation portion is arranged on the upper end of the mounting portion and has a plurality of excitation teeth for exciting sound waves by contacting and colliding with the eggs, and at least two excitation teeth have a second included angle with the first direction; Preferably, the second included angle is less than or equal to the first included angle; Preferably, the spiral excitation portion is further provided with an import block and an export block, the excitation teeth are arranged between the import block and the export block, the upper end of the import block has a first convex surface for guiding the eggs into the spiral excitation portion, the height of the first convex surface close to one side of the first preset section is equivalent to the height of the first preset section, and the upper end of the export block has a second convex surface for guiding the eggs to separate from the spiral excitation portion, the height of the second convex surface close to one side of the second preset section is equivalent to the height of the second preset section. Preferably, the excitation protrusions of the spiral excitation part extend from the inlet block to the outlet block in sequence, and the orthographic projection profile of the spiral excitation part in the projection of the egg detection channel is a first curve; Preferably, the period of the first curve is the circumference of n eggs in the short axis direction, and n is a natural number; Preferably, the m periods of the first curve are the circumference of an egg in the short axis direction, and m is a natural number; Preferably, the excitation protrusions of the spiral excitation part extend from the inlet block to the outlet block in sequence, and the orthographic projection profile of the inlet block, the excitation protrusions and the outlet block in the second direction is a second curve; the curvature of the second curve is smaller than the curvature of the egg in the half axis direction; Preferably, two spiral excitation parts are arranged on the upper end of the mounting part, and the two spiral excitation parts are arranged in mirror symmetry along the center line of the mounting part; Preferably, the upper end of the mounting part is provided with a first excitation part and a second excitation part arranged oppositely; one of the first excitation part and the second excitation part is the spiral excitation part, and the other is a non-spiral excitation part, and the contact trajectory of the non-spiral excitation part is in the same direction as the rolling direction of the egg; Preferably, both the first excitation part and the second excitation part are the spiral excitation part; preferably, the first curve of the first excitation part and the first curve of the second excitation part are the same; preferably, the first curve of the first excitation part and the first curve of the second excitation part are different; Preferably, both the first excitation part and the second excitation part are the spiral excitation part, and the second curve of the first excitation part and the second curve of the second excitation part 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 to each other, and the second curve peak heights of the corresponding excitation protrusions are equivalent; Preferably, the second curve valleys of the excitation protrusions of the first excitation part and the second curve valleys of the excitation protrusions of the second excitation part correspond to each other, and the second curve valley heights of the corresponding excitation protrusions are 0-1 / 4 of the short axis height.

3. The egg surface latent crack acoustic online detection device based on spiral wave multi-dimensional excitation according to claim 1, wherein the first excitation part is located on the sharp end side of the egg, the second excitation part is located on the blunt end side of the egg, the excitation protrusions of the first excitation part have a first contact position which collides with the sharp end of the egg, and the excitation protrusions of the second excitation part have a second contact position which collides with the blunt end of the egg; the height level of the first contact position is substantially equivalent to the height level of the second contact position; Preferably, the egg detection channel has a preset horizontal inclination angle, and the setting range of the horizontal inclination angle is 0-5°; when the horizontal inclination angle of the egg detection channel is switched from a first angle to a second angle, the first contact position which collides with the sharp end of the same egg is switched from a first position to a second position, and the second contact position which collides with the blunt end of the same egg is switched from a third position to a fourth position.

4. The egg surface latent crack acoustic online detection device based on spiral wave multi-dimensional excitation according to claim 1, wherein ​ The egg pushing mechanism is configured to push the egg to roll on the egg detection channel to make the egg collide with the corrugated array mechanism to generate sound waves; the egg pushing mechanism comprises a pushing plate and a transmission mechanism mounted on the support frame, the transmission mechanism is provided with a transmission slide rail and a transmission motor driving a slider on the transmission slide rail, the transmission slide rail is arranged in parallel with the egg detection channel, one side of the pushing plate is fixed with the slider, and the other end is provided with a pushing block in contact with the egg, and the pushing block slides in the first direction to push the egg to roll on the egg detection channel under the driving of the transmission motor; Preferably, the support frame is fixedly installed with a channel fixing seat, the egg detection channel is an egg conveying groove fixed on the channel fixing seat and extending in the first direction, and the lower end of the egg conveying groove is fixedly connected with the channel fixing seat through a protruding fixing plate; the inside of the egg conveying groove has a first preset section, a detection section and a second preset section along the first direction, the detection section comprises an embedded part accommodating the corrugated array mechanism, and the embedded part is provided with an embedded fixing hole matched with the corrugated array mechanism; The installation part between the first excitation part and the second excitation part of the corrugated array mechanism is provided with an installation hole corresponding to the embedded part; the embedded part fixes the corrugated array mechanism through the embedded fixing hole and the installation hole; Preferably, the first preset section and the second preset section are integrally formed, the first preset section or the second preset section comprises a T-shaped groove formed by communication of a first groove body and a second groove body, and the groove bottom surface of the first groove body is at a height level corresponding to that of the guide-in block and the guide-out block; the groove bottom surface of the second groove body is at a height level lower than that of the first groove body; Preferably, the slot width of the second groove body is equivalent to the guide-in width or the guide-out width between the first excitation part and the second excitation part of the corrugated array mechanism.

5. The egg surface latent crack acoustic online detection device based on spiral corrugated multi-dimensional excitation according to claim 1, wherein The sound wave collecting mechanism comprises a sound wave collecting fixing frame fixed with the slider, and a sound collector is arranged on the sound wave collecting fixing frame; the position of a sound sensor of the sound collector is arranged opposite to the position of the egg; Preferably, the relative distance between the pushing block and the sound wave collecting fixing frame in the first direction is fixed; Preferably, the sound wave collecting fixing frame and the pushing plate are integrally arranged, the sound wave collecting fixing frame is provided with an oblique mounting frame, and the sound collector is arranged in the oblique mounting frame; the height level of the sound sensor of the sound collector is located at half of the height level of the egg when the egg is transversely arranged; Preferably, the distance between the excitation teeth of two adjacent first excitation parts in the first direction is a first distance, and the distance between the excitation teeth 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 the first distance or the second distance; greater than or equal to half of the first distance or half of the second distance. 6.The egg surface latent crack acoustic online detection device based on spiral wave-ridge multidimensional excitation according to claim 1, characterized in that, One side of the support frame is provided with an inclined angle adjusting plate, and the inclined angle adjusting plate is fixedly installed on the support frame according to a preset inclined angle.

7. A method for on-line non-destructive acoustic detection of cracks in poultry eggs based on multi-dimensional excitation of helical corrugations, characterized by The method comprises the following steps: (S1) according to the length of the wave-ridge array mechanism in the first direction, rolling the egg at a preset speed to collect sound waves generated by the contact excitation of the egg and the wave-ridge array mechanism in a plurality of periods; (S2) converting the sound wave information into an electrical signal, and judging whether the eggshell has cracks according to the difference of the sound sensor output signal to obtain the crack detection result of the egg and the corresponding crack position. 8.Application of the egg surface latent crack acoustic online detection device based on spiral wave-ridge multidimensional excitation according to claims 1-6 in nondestructive testing of egg cracks.

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. The computer program is executed by a processor to realize the nondestructive testing method of any one of claims 7. 10.A computer device, comprising: a memory for storing instructions; a processor for executing the instructions to enable the device to realize the nondestructive testing method of any one of claims 7.

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