CN110691970A

CN110691970A - Eggshell state inspection device

Info

Publication number: CN110691970A
Application number: CN201880035897.8A
Authority: CN
Inventors: 藤谷伸一
Original assignee: Nabel Co Ltd
Current assignee: Nabel Co Ltd
Priority date: 2017-10-24
Filing date: 2018-10-16
Publication date: 2020-01-14
Anticipated expiration: 2038-10-16
Also published as: WO2019082730A1; JPWO2019082730A1; CN110691970B; JP7057602B2

Abstract

An eggshell condition inspection device (1) is provided with a knocking body (2), a stress light-emitting body (6), a measuring section (3), and a judging section (10). The knocking body (2) is made to collide with an eggshell as an inspection object. The stress light-emitting body (6) is provided on the knocking body (2), and the stress light-emitting body (6) emits light in accordance with the deformation of the knocking body (2) caused by the collision of the knocking body (2) with the eggshell. The measuring unit (3) measures the amount of light emitted from the stress light emitter (6) by the impact of the impact body (2) with the eggshell. The judging unit (10) judges the state of the eggshell based on the amount of light obtained by the measuring unit (3). The eggshell state inspection device (1) is used for judging the state of the eggshell by only observing the behavior of the knocking body (2). The eggshell state inspection device (1) is used for judging whether the eggshell has cracks or not. The eggshell state inspection device (1) is used for inspecting the difference of eggshell properties of normal eggs.

Description

Eggshell state inspection device

Technical Field

The present invention relates to an eggshell condition inspection device for inspecting the condition of an eggshell by making a knocking body collide with the eggshell.

Background

Various inspection devices for inspecting the state of an eggshell, for example, a normal egg or an egg having a crack, are known. As such an inspection device, there is an inspection device that determines the state of an eggshell based on the movement (vibration) of the eggshell after being struck by a striking body. Further, there is an inspection device that determines the state of an eggshell based on the springback of a knock-out body after collision with the eggshell. For example, in the inspection device described in patent document 1, the state of the eggshell must be determined after the 2 nd and subsequent collisions of the eggshell with the knocking body. Therefore, the inspection requires a certain time or more, which is a factor that hinders the speeding up of the inspection.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5832700

Patent document 2: japanese laid-open patent publication No. 2002-

Disclosure of Invention

Problems to be solved by the invention

The present invention is directed to inspecting the state of an eggshell using a new principle different from that of a conventional inspection apparatus for inspecting the state of an eggshell.

Means for solving the problems

The present invention provides an eggshell state inspection device, which comprises a knocking body, a stress light-emitting body, a measuring part and a judging part. The knocking body is made to collide with an egg shell as an inspection object. The stress luminous body is arranged on the knocking body and correspondingly emits light according to the deformation of the knocking body generated by the collision of the knocking body and the eggshell. The measuring unit measures the amount of light emitted from the stress illuminator by the impact of the knocking body with the eggshell. The judging section judges the state of the eggshell based on the light quantity obtained by the measuring section.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention can provide an eggshell condition inspection device for inspecting eggshells by a new principle different from the conventional eggshell condition inspection device.

The above and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description, which is to be read in connection with the accompanying drawings, related to the present invention.

Drawings

Fig. 1 is a view schematically showing an eggshell condition inspection apparatus according to an embodiment of the present invention.

Fig. 2 is a graph showing the measurement results of the eggshell condition inspection device in this embodiment.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in fig. 1, an eggshell condition inspection device 1 of the present embodiment is an eggshell condition inspection device for inspecting whether an egg E has a crack, and its main body is composed of a knocking body 2, a measuring section 3, and a judging section 10. The eggshell condition inspection apparatus 1 further includes: a driving unit (not shown) for driving the knocking body 2; and an irradiation unit 4 that irradiates light to the knocking body 2.

The knocking body 2 is made to collide with an eggshell as an inspection object. The impact body 2 contains a stress emitter 6, which stress emitter 6 emits light in accordance with the deformation produced in the impact body 2 by the impact of the impact body 2 with the eggshell. The knocking body 2 is hollow, and a stress luminous body 6 is arranged in the hollow part of the knocking body.

The striking body 2 is formed of, for example, a transparent and elastically deformable resin. The knocking body 2 has, for example, a cylindrical shape, and is disposed so that the outer peripheral surface 21 collides with the egg E and the hollow portion 22 does not contact the egg E. The outer peripheral surface 21 of the knocking body 2 includes a contact region 23 that comes into contact with the egg E during knocking and a non-contact region 24 that does not come into contact with the egg E during knocking.

The stress light emitter 6 is, for example, a light emitter to which the stress light emitting material described in patent document 2 is applied, and the light emission intensity thereof changes depending on the magnitude of mechanical energy applied from the outside. It is known that the luminous intensity is proportional to the "rate of change of strain energy" represented by the product of strain and the rate of change of strain. In the present embodiment, the stress illuminator 6 is provided in the hollow portion 22 of the striking body 2. The stress illuminator 6 is provided on the back (inner surface) of the contact region 23 of the tap body 2. The stress illuminator 6 is provided on the tap body 2 so as to deform in accordance with the deformation of the tap body 2. The stress illuminator 6 is provided to the impact body 2 so as to be deformed integrally with the impact body 2 that collides with the eggshell. The stress illuminator 6 is provided in such a way as to be able to directly detect the deformation of the contact area 23 of the tap body 2.

In the eggshell condition inspection apparatus 1 of the present embodiment, one end side of the shaft 7 is connected to the knocking body 2. The shaft 7 has rigidity, supports the knocking body 2, and transmits force from the driving portion to the knocking body 2.

The measuring unit 3 measures the amount of light emitted from the stress emitter 6 of the tap body 2. The term "light amount" in the present specification also includes a value obtained by second differentiating a change rate of light intensity or light intensity, and the like. The measuring unit 3 measures the degree of deformation of the knocking body 2 itself. In addition, the measuring section 3 measures the speed at which the knocking body 2 leaves the eggshell. In the measurement unit 3 of the eggshell condition inspection apparatus 1 of the present embodiment, a photodiode provided with a condenser lens 31 is used as an example, and the condenser lens 31 condenses light around the collision position (I) of the impact body 2.

The determination unit 10 determines the state of the eggshell based on the light quantity obtained by the measurement unit 3. The determination unit 10 determines the state of the eggshell based on the degree of deformation of the impact body 2 obtained by the measurement unit 3. The determination unit 10 determines the state of the eggshell based on the speed at which the impact body 2 is separated from the eggshell, which is obtained by the measurement unit 3. The determination unit 10 in the eggshell condition inspection apparatus according to the present embodiment is configured by a dedicated or general-purpose computer such as a cpu (central Processing unit), an internal memory, an input/output interface, and an AD conversion unit. The CPU or other peripheral devices cooperate with each other in accordance with a program stored in the internal memory, thereby functioning as a determination unit.

The driving section controls the operation of the knocking body 2. The drive section causes the knocking body 2 to reciprocate in an arc shape between an upper end position (T) and a collision position (I) in contact with the eggshell. Further, in fig. 1, a state is shown in which the knocking body 2 (right side in the drawing) colliding with the tip end side of the egg E is in the upper end position (T) and the knocking body 2 (left side in the drawing) colliding with the blunt end side of the egg E is in the collision position (I). The driving portion includes, for example, a cam, a spring, and the like provided on the other end side of the shaft 7 connected to the knocking body 2. As the driving unit, the same driving unit as that used in the related art or a driving unit based on the driving unit can be applied. Therefore, detailed description of the driving portion is omitted.

The irradiation unit 4 irradiates the tap body 2 with a predetermined light to accumulate the light in the stress emitter 6 of the tap body 2. In the eggshell condition inspection apparatus 1 of the present embodiment, an LED (light Emission diode) that emits light having a wavelength for exciting the stress emitter 6 is used as the irradiation portion 4. The irradiation unit 4 irradiates the stress illuminator 6 temporarily held at the upper end position (T) with light for a predetermined time, and the irradiation unit 4 turns off the light in other time periods.

The eggshell condition inspection apparatus 1 of the present embodiment is used together with a conveying apparatus (not shown) such as a roller well known in the art. The eggshell condition inspection device 1 inspects eggs E conveyed to the downstream side by the conveying device. The eggs E are conveyed by the conveying device while being rotated about the long axis (the axis connecting the tip end side and the blunt end side) of each egg E. In each egg E, the tip side and the blunt end side are knocked, respectively. In the present embodiment, 8 portions on the tip end side and 8 portions on the blunt end side of 1 egg E are each struck by the striking body 2. The tapping method is also the same as or based on the tapping method used in the related art. Therefore, a detailed description of the tapping method is omitted. In the eggshell condition inspection apparatus 1 of the present embodiment, at least a plurality of striking bodies 2 and the measuring section 3, the driving section, and the irradiation section 4 corresponding to each striking body 2 are unitized.

As an example of the inspection method using the eggshell condition inspection apparatus 1 of the present embodiment, the inspection is performed by a series of cyclic operations of the striking body 2. That is, the inspection method is executed by a series of cycles of a standby step, a light accumulation step, a lowering step, an approaching step, a collision step, a free movement step, a raising stroke, and returning to the standby step again after reaching the upper end position (T).

In the standby step, the knocking body 2 is held at the upper end position (T) by the operation of the driving section. In the light accumulation step, the light is irradiated from the irradiation portion 4 in a state where the tap body 2 is held at the upper end position (T), and the irradiated light is absorbed by the stress emitter 6 of the tap body 2 and accumulated as energy. During a short period after the irradiation with light, fluorescence continues to be emitted from the luminescent material 6 as afterglow at least in the course of the series of cycles.

In the lowering process, the knocking body 2 is lowered toward the eggshell. At this time, the stress luminescent material 6 inside the tap body 2 continues to emit fluorescence as afterglow. The approaching step is a state in which the knocking body 2 descends toward the eggshell, and is a continuation of the descending step. In this approach step, the afterglow of the stress luminescent body 6 provided on the descending tap body 2 enters the field of view of the measurement unit 3, and the amount of light received by the measurement unit 3 increases.

In the collision process, the knocking body 2 reaches the collision position (I) and collides with the egg shell. At this time, at least one of the tap body 2 and the egg shell is deformed. In the collision step, when the tap body 2 is deformed, a force is applied to the stress emitter 6 following the deformation to generate stress luminescence, and the measurement unit 3 receives the stress luminescence in addition to afterglow from the stress emitter 6. Further, although the collision position (I) varies depending on the size or shape of the egg, the light from the collision positions (I) different from each other depending on the egg E can be measured by providing the measuring unit 3 with the condenser lens 31.

In the free movement process, the knocking body 2 receives no force from the driving portion. In the free movement process, the knocking body 2 collided with the eggshell leaves the eggshell. In the free movement process, the knocking body 2 rebounds from the collision position (I) with the eggshell in the direction of the arc-shaped upper end position (T). In the ascending stroke, the knocking body 2 is returned to the upper end position (T) by the operation of the driving portion.

Next, a difference in change in the amount of light received by the measurement unit 3 between a case where the tap body 2 collides with a portion where a crack exists (indicated by a broken line in fig. 2) and a case where the tap body 2 collides with a (normal) portion where a crack does not exist (indicated by a solid line in fig. 2) will be described with reference to fig. 2. In the eggshell condition inspection apparatus 1 according to one embodiment, the measurement (observation) is performed by the measurement unit 3 in the lowering step, the approaching step, the collision step, and the free movement step among the above-described steps, and the measurement value of the light amount in a predetermined time period after a time exceeding a predetermined light amount threshold is recorded, thereby determining the condition of the eggshell. In other words, in the eggshell condition inspection apparatus 1, the measurement is performed not only when the impact body 2 collides with the eggshell but also in the time period before and after the collision.

In the approach step, no difference was observed in the amount of light received or the change in the amount of light received over time, regardless of whether the eggshell had a crack or was normal. On the other hand, in the collision step, when the eggshell has a crack, the amount of light received is smaller than when the eggshell is normal. That is, when the crack is present in the eggshell, the degree of deformation of the impact body 2, specifically, the "rate of change in strain energy" represented by the product of the strain and the rate of change in strain, is smaller than in the case where the eggshell is normal. In the free movement process, when the eggshell has a crack, the rate of decrease in the amount of light received is slower than when the eggshell is normal. That is, when there is a crack in the eggshell, the speed at which the striking body 2 moves away from the eggshell is slower than when the eggshell is normal.

The reason behind these phenomena is the difference in the proportion of the distribution of kinetic energy that the striking body 2 has immediately before impact. The kinetic energy possessed by the beating body 2 immediately before the collision is distributed to the beating body 2 after the collision and the egg shell as the beaten body.

In the case where the rigidity or strength of the eggshell as the knocked body is large, deformation of the eggshell side or friction of the interior of the eggshell is small, and the energy received by the eggshell is small. In this case, a relatively large proportion of the kinetic energy of the knocking body 2 colliding with the eggshell to be inspected remains on the knocking body 2 side, and is converted into strain energy of the knocking body 2 itself. In this process, the stress illuminator 6 fixed inside the knocking body 2 also obtains a large strain energy, and stress light emission corresponding to the strain energy is generated from the stress illuminator 6.

On the other hand, when the rigidity or strength of the eggshell as the body to be knocked is low due to cracks or the like around the portion of the eggshell where the body to be knocked collides, the deformation on the eggshell side and the friction inside the eggshell are large, and the energy received by the eggshell is large. In this case, among the kinetic energies of the striking body 2 which is about to collide with the eggshell as the inspection object, the energy received by the eggshell side becomes large, and the proportion of the kinetic energy remaining on the striking body 2 side becomes smaller than that when the rigidity or strength of the eggshell is large. Thus, the conversion of the strain energy to the knocking body 2 itself is also small. In this process, the strain energy obtained by the stress illuminator 6 fixed inside the knocking body 2 also becomes small. Therefore, stress light emission does not occur from the stress light emitter 6, or even if stress light emission occurs from the stress light emitter 6, only weak stress light emission occurs.

The reason why the knocking body 2 is separated from the eggshell after the collision is that the energy remaining as the strain energy of the knocking body 2 itself is once again converted into the kinetic energy. Therefore, the greater the strain energy remaining in the knocking body 2 itself, the faster the knocking body 2 moves away from the egg shell. Conversely, the smaller the strain energy remaining in the knocking body 2 due to cracks in the eggshell, the slower the speed of the knocking body 2 from the eggshell.

In this way, the amount of kinetic energy distributed to the striking body 2 itself after the collision changes according to the state of the rigidity or strength of the eggshell as the struck body, and when the state is observed as strain energy, the strain energy corresponds to the amount of stress luminescence, and when the state is observed after returning to kinetic energy again, the amount of kinetic energy that the striking body 2 has immediately after the collision corresponds to the speed at which the striking body 2 leaves the eggshell after the collision.

In the eggshell condition inspection apparatus 1 of the present embodiment, it can be said that the measured deformation of the striking body 2 itself or the speed of the striking body 2 moving away from the eggshell is a phenomenon that reflects the rigidity or strength of the body to be struck (eggshell). Therefore, the state of the rigidity or strength of the eggshell is determined by measuring the deformation of the knocking body 2 itself or the speed of leaving the eggshell after the collision.

As described above, the eggshell condition inspection apparatus 1 of the present embodiment includes the tap body 2, the stress emitter 6, the measurement unit 3, and the determination unit 10. The knocking body 2 is made to collide with an eggshell as an inspection object. The stress light-emitting body 6 is provided to the tap body 2, and the stress light-emitting body 6 emits light in accordance with the deformation of the tap body 2 caused by the collision of the tap body 2 with the eggshell. The measuring unit 3 measures the amount of light emitted from the stress emitter 6 by the impact of the impact body 2 with the eggshell. The determination unit 10 determines the state of the eggshell based on the light quantity obtained by the measurement unit 3. With such a configuration, it is possible to determine whether or not a crack has occurred in the eggshell by a new method that has not been available.

In other words, the eggshell condition inspection device 1 of the present embodiment includes: a knocking body 2 for colliding the knocking body 2 with an egg shell as an inspection object; a measuring unit 3 for measuring the degree of deformation of the knocking body 2 itself; and a determination unit 10 for determining the state of the eggshell based on the physical quantity indicating the degree of deformation of the impact body 2 obtained by the measurement unit 3.

The eggshell condition inspection device 1 of the present embodiment includes: a knocking body 2 for colliding the knocking body 2 with an egg shell as an inspection object; a measuring unit 3 for measuring a speed at which the knocking body 2 moves away from the egg shell; and a determination unit 10 for determining the state of the eggshell based on the speed of the knocking body 2 leaving the eggshell, which is obtained by the measurement unit 3.

In the eggshell condition inspection apparatus 1 of the present embodiment, since the amount of light emitted from the stress emitter 6 is measured, wiring of the striking body 2 is not necessary, and a simple structure can be provided. In the eggshell condition inspection apparatus 1, the stress illuminator 6 approaches the eggshell while emitting light, so that the start time of measurement can be easily captured. Further, it is possible to detect a tapping time point (tapping timing) that differs depending on the size, shape, or the like of the egg. Further, after the impact body 2 collides with the eggshell, the stress emitter 6 is also separated from the eggshell while emitting light, and thus the end time point of the measurement can be easily captured.

In the eggshell condition inspection apparatus 1 of the present embodiment, a plurality of eggs E can be measured simultaneously. That is, in the conventional egg shell condition inspection device, it is difficult to obtain accurate data because signals obtained from the environment in which eggs other than the inspection target or eggs to be inspected are located interfere with signals of the eggs to be inspected, and in contrast, in the egg shell condition inspection device 1 according to the present embodiment, such interference can be easily suppressed.

In the eggshell condition inspection apparatus 1 of the present embodiment, the eggshell condition can be determined based on only the 1 st collision of the striking body 2 against the eggshell. Therefore, the inspection can be performed in a shorter time than the conventional method using the springback of the knocking body, and the egg E can be conveyed at a higher speed.

In the eggshell condition inspection apparatus 1 of the present embodiment, it is possible to accurately determine eggs of various sizes or cracked eggs of various degrees generated in eggshells, which have been difficult to determine in the past, using the rate of change in strain energy of the striking body 2 itself, which has not been paid attention to in the past.

In the eggshell condition inspection device 1 of the present embodiment, the stress illuminator 6 provided on the knocking body 2 is not in direct contact with the eggshell, and therefore the stress illuminator 6 is less likely to be contaminated, and the effect thereof can be sustained. In addition, cleaning of the striking body 2 is also easy. Further, since light from the stress emitter 6 can pass through the tap body 2, the measurement unit 3 can be easily observed from above.

The present invention is not limited to the above embodiments.

The eggshell condition inspection apparatus 1 is used not only for inspecting whether or not an eggshell has a crack, but also for inspecting differences in eggshell properties of normal eggs (for example, rigidity, strength, and the like of an eggshell). That is, the present invention can be applied to various inspection apparatuses that determine a difference in eggshell properties of normal eggs by causing a knocking body to collide with the eggshell.

The knocking body 2 may be applied to various structures used in a conventional cracked egg inspection device, in addition to the illustrated structure, and may be, for example, a knocking body that is not connected to a shaft, that is, a knocking body supported by another method. Various changes can be made to the downward swing position or direction of the striking body. The shape of the striking body can be variously modified in addition to the illustrated shape.

The stress illuminator may be provided at a portion of the knocking body 2 other than the contact member (or the contact portion) that directly touches the eggshell. In the eggshell condition inspection apparatus 1 of the above-described embodiment, the contact member provided with the contact region 23 is elastically deformable, and the rigid shaft 7 is used as a support member for supporting the contact member, for example, a rigid member may be used as the contact member, and a rod-shaped elastically deformable support member may be used as a support member for supporting the contact member. In the eggshell condition inspection device, the eggshell condition can be determined based on the light quantity emitted from the stress light emitter provided on the supporting member by the method based on the above-described embodiment.

The tap body 2 may include the stress illuminator 6, and the stress illuminator 6 may be provided on the outer peripheral surface of the tap body 2, for example. Further, the stress illuminator 6 may be mixed into the resin forming the tap body 2.

The striking body 2 is not limited to a transparent structure, and various modifications can be made as long as light from the stress illuminator 6 can be transmitted. Further, when the shape of the tap body 2 or the installation position of the stress emitter 6 is designed, or light from the stress emitter 6 is guided to the measurement unit 3 using an optical fiber or the like, a portion where the light from the stress emitter 6 is blocked by the tap body 2 itself can be eliminated, and therefore, the tap body 2 can be formed using a material other than transparent.

The stress illuminator 6 can be variously applied as long as it can emit light according to the deformation of the tap body 2. As the light used for excitation, light suitable for the characteristics of the stress light-emitting material, such as generally known ultraviolet rays, electron beams, X-rays, and radiation, may be used.

The shape, arrangement position, and the like of the measurement unit 3 can be variously changed. The measuring unit 3 is not limited to the condenser lens 31.

In the eggshell condition inspection apparatus 1 of the above-described embodiment, the eggshell condition is determined based on only the 1 st impact of the knocking body 2 on the eggshell, but the eggshell condition may be determined after the knocking body 2 rebounds, that is, the knocking body 2 is allowed to impact the eggshell after the 2 nd impact.

In the eggshell condition inspection apparatus 1 of the present invention, the state of the eggshell is determined by observing only the behavior of the knocking body 2 side, but may be used together with a function of determining the state of the eggshell by observing the sound or vibration of the eggshell after knocking, which is conventionally known in the art. Information obtained from sound data, vibration data, or the like, that is, information of the eggshell that cannot be obtained by observing only the behavior of the knocking body 2 side, and information that can be obtained by observing only the behavior of the knocking body 2 may be combined to determine the state of the eggshell.

The eggshell to be examined is not limited to an eggshell of an egg, and may be, for example, an eggshell of a duck egg or the like.

The embodiments disclosed herein are examples, and are not limited to these. The scope of the present invention is not defined by the above description, and it should be understood that the scope of the present invention is defined by the claims and includes all modifications equivalent in meaning and scope to the claims.

Industrial applicability

The present invention can be used for an eggshell state inspection device which inspects an eggshell by making a knocking body collide with the eggshell.

Description of the reference numerals

1. An eggshell state inspection device; 2. a knocking body; 3. a measuring section; 4. an irradiation unit; 6. a stress illuminator; 7. a shaft; 10. a judgment section; 21. an outer peripheral surface; 22. a hollow portion; 23. a contact region; 24. a non-contact region; 31. a condenser lens; E. and (7) eggs.

Claims

1. An apparatus for inspecting the state of an eggshell, wherein,

the eggshell state inspection device comprises:

a knocking body that collides with an egg shell as an inspection object;

a stress light emitter provided to the knocking body, the stress light emitter emitting light according to deformation of the knocking body caused by collision of the knocking body with the egg shell;

a measuring unit that measures the amount of light emitted from the stress emitter by the impact of the impact body with the eggshell; and

and a determination unit that determines the state of the eggshell based on the light amount obtained by the measurement unit.